CN114659117A - Waste incineration treatment system - Google Patents

Abstract

The invention discloses a waste incineration treatment system, which is characterized by comprising a tunnel kiln (1) and an incinerator (4); the incinerator (4) includes an incinerator main body, and the incinerator main body has a furnace chamber and a flue gas. The total discharge port (409); the tunnel kiln (1) includes a main structure of the tunnel kiln, an incinerator tail gas introduction device (115) and a waste heat exhaust device; the main structure of the tunnel kiln is divided into multiple parts from the kiln head to the kiln tail. A plurality of working zones include at least one high-temperature zone, and the incinerator tail gas introduction device (115) introduces the flue gas discharged from the flue gas general discharge port (409) into the main body of the burning tunnel kiln, The waste heat exhaust device introduces the flue gas in the high temperature zone into the furnace. The invention provides a waste incineration treatment system, so as to improve the waste treatment effect and save the cost of flue gas treatment.

Description

Waste Incineration Treatment System

technical field

The invention relates to the technical field of garbage incineration equipment, in particular to a garbage incineration treatment system.

Background technique

The waste incineration treatment system treats municipal solid waste, etc., generally by means of incineration. MSW in China has the characteristics of multi-component and multi-form, high moisture and high volatile content, low calorific value and low fixed carbon, and its composition varies greatly with seasons and different collection locations.

In the late 1980s, my country introduced the reverse-push mechanical grate incinerator technology from Japan, and my country began the modern incineration of municipal solid waste. Since then, incinerator cameras of different furnace types have been introduced from abroad, and many domestic waste incinerators with different working principles have also been developed in China.

Currently, there are several types of incinerators. However, with the increasing amount of garbage disposal year by year, the effect of garbage disposal is poor.

The current waste incineration plant incinerator flue gas treatment usually adopts: SNCR out-of-stock + semi-dry method + dry method (deacidification) + activated carbon jet adsorption + bag dust removal comprehensive treatment technology, the process flow is long, and there are many operating equipment, due to the presence of dioxins, etc. Substances have high requirements on equipment operation and management, which directly leads to high investment and management costs of waste incineration plants. The drying and incineration process in waste pretreatment will lead to the production of a large amount of VOCs, so the incineration plant is also equipped with a regenerative oxidizer or a regenerative catalytic oxidation burner (the effect is equivalent to the secondary combustion chamber). Therefore, due to pollutants such as dioxins, VOCs, fly ash and other SO2 in the flue gas, the cost of flue gas treatment in the waste incineration treatment system is relatively high.

Therefore, how to improve the effect of garbage treatment and save the cost of flue gas treatment is an urgent problem to be solved by those skilled in the art.

SUMMARY OF THE INVENTION

In view of this, the present invention provides a waste incineration treatment system to improve the waste treatment effect and save the cost of flue gas treatment.

To achieve the above object, the present invention provides the following technical solutions:

A waste incineration treatment system, comprising a tunnel kiln and an incinerator;

The incinerator includes a main body of the incinerator, and the main body of the incinerator has a furnace chamber and a total flue gas discharge port;

The tunnel kiln includes a tunnel kiln main structure, an incinerator tail gas introduction device and a waste heat exhaust device; the tunnel kiln main structure is divided into a plurality of working zones from the kiln head to its kiln tail, and the plurality of working zones include at least a high temperature zone, the incinerator tail gas introduction device introduces the flue gas discharged from the flue gas general discharge port into the main body of the burning tunnel kiln, and the waste heat exhaust device introduces the flue gas in the high temperature zone into the furnace chamber .

Optionally, in the above-mentioned waste incineration treatment system, the incinerator further comprises a stirring device and a feeding bin arranged on the top of the main body of the incinerator; the main body of the incinerator comprises a multi-layered furnace chamber arranged from top to bottom. , There is a communication structure between the two adjacent furnace chambers for the material to go down and the flue gas to go up; the main body of the incinerator is divided into a drying area, a combustion area and a cooling area from top to bottom. Both the cooling zone and the cooling zone have one or several layers of the furnace; the feeding bin is arranged on the top of the main body of the incinerator, and the discharge port of the feeding bin is connected to the first layer of the main body of the incinerator. The furnace is in communication; the stirring device includes a plurality of stirring components, and the plurality of stirring components are arranged in a one-to-one correspondence with the multiple layers of the furnace.

Optionally, in the above-mentioned waste incineration treatment system, the multi-layered furnace chambers include cross-arranged edge feeding furnace chambers and central feeding furnace chambers;

The feeding port of the edge-feeding furnace is located at its top edge, and the discharging port of the edge-feeding furnace is located at the bottom center; the feeding port of the center-feeding furnace is located at the top center, and the center feeding The discharge opening of the furnace is located on its bottom edge.

Optionally, in the above waste incineration treatment system, the stirring device further comprises a stirring shaft and a driving device for driving the stirring shaft to rotate;

A plurality of the stirring assemblies are arranged along the axial direction of the stirring shaft.

Optionally, in the above-mentioned waste incineration treatment system, cooling channels that communicate with each other are provided in the stirring shaft and the stirring assembly;

One end of the stirring shaft has a cooling medium inlet, and the other end of the stirring shaft has a cooling medium outlet.

Optionally, in the above-mentioned waste incineration treatment system, the furnace chambers of the combustion zone all have a heat source combustion chamber or a heat source combustion chamber that provides the furnace chamber with fresh air required for material combustion and an external heat source required to maintain the furnace chamber temperature. room interface.

Optionally, in the above-mentioned waste incineration treatment system, a compensation port for supplementing fresh air and a heat source and an air inlet duct connecting the compensation port are arranged on the furnace wall of the furnace;

The air inlet duct includes an air inlet main pipe and a plurality of air inlet branch pipes communicated with the air inlet main pipe, and a plurality of the air inlet branch pipes are connected to the compensation ports in one-to-one correspondence;

The waste heat exhaust device leads out the flue gas in the working belt, and the outlet of the waste heat exhaust device is connected with the inlet of the air inlet main pipe.

Optionally, in the above-mentioned waste incineration treatment system, each layer of the furnace chamber has an independent air outlet;

It also includes exhaust ducts and heat circulation pipes;

the exhaust duct is connected to the exhaust port and the total exhaust port of flue gas of the incinerator;

The air outlet of the furnace in the combustion zone and the inlets of the furnace in the drying zone and the cooling zone are communicated through the heat circulation pipe.

Optionally, in the above-mentioned waste incineration treatment system, each of the working belts has a kiln chamber and an interlayer, and the kiln chamber and the interlayer are communicated through smoke holes; a plurality of the working belts have a first working belt. a belt and a second working belt, the temperature of the flue gas in the first working belt is greater than the temperature of the flue gas in the second working belt;

The tunnel kiln further includes a flow guiding device, and the flow guiding device guides the flue gas in the interlayer corresponding to the first working zone into the kiln chamber corresponding to the second working zone.

Optionally, in the above-mentioned waste incineration treatment system, the plurality of working belts include a moisture removal preheating belt, a low-temperature drying belt, a medium-temperature drying belt, a high-temperature drying belt, a roasting belt, a thermal insulation belt, and a cooling belt, which are arranged in sequence. The roasting zone is lowered from the kiln head to the kiln tail of the main structure of the tunnel kiln;

When the high temperature drying belt and/or the roasting belt is the first working belt, the heat preservation belt is the second working belt;

The flow guiding device includes a high temperature flow guiding device, and the high temperature flow guiding device guides the flue gas in the interlayer corresponding to the high temperature drying zone and/or the roasting zone into the kiln chamber corresponding to the heat preservation zone middle.

Optionally, in the above waste incineration treatment system, the incinerator tail gas introduction device introduces the flue gas discharged from the total flue gas discharge port into the roasting zone.

Optionally, in the above-mentioned waste incineration treatment system, the high-temperature flow guiding device is further configured to introduce the flue gas in the interlayer corresponding to the high-temperature drying belt into the kiln chamber at the end of the roasting belt.

Optionally, in the above waste incineration treatment system, when the high temperature drying belt is the first working belt, the medium temperature drying belt is the second working belt;

The flow guiding device includes a medium temperature flow guiding device, and the medium temperature flow guiding device guides the flue gas in the interlayer corresponding to the high temperature drying zone into the kiln chamber corresponding to the medium temperature drying zone.

Optionally, the above-mentioned waste incineration treatment system further includes a chimney and a general exhaust device arranged at the kiln head of the main structure of the tunnel kiln, and the outlet of the general exhaust device is communicated with the chimney.

Optionally, the above-mentioned waste incineration treatment system further includes an ambient flue gas induced draft fan arranged at the kiln end of the main structure of the tunnel kiln for introducing ambient flue gas;

The ambient flue gas induced draft fan is communicated with the kiln tail of the main structure of the tunnel kiln.

Optionally, the waste incineration treatment system further includes a waste heat device;

The total flue gas discharge port is connected to the inlet of the waste heat device, and the incinerator tail gas introduction device is connected to the flue gas outlet of the waste heat device.

Optionally, the above-mentioned waste incineration treatment system further includes a gear steam generator connected to the steam outlet of the waste heat device;

And/or, a rotary drying kiln connected with the steam outlet of the waste heat device, the outlet of the rotary drying kiln is connected with the chimney of the waste incineration treatment system.

It can be seen from the above technical solutions that the waste incineration treatment system provided by the present invention introduces the exhaust gas inlet of the incinerator into the main body of the tunnel kiln through the introduction of the exhaust gas of the incinerator, and conducts waste heat treatment on the flue gas discharged from the exhaust gas outlet. In addition, the flue gas containing dioxins, dust, VOCs and acidic substances enters the main body of the tunnel kiln, and the dioxins and VOCs are fully decomposed in the high temperature oxidation environment in the main body of the tunnel kiln. The alkaline wet bricks will absorb and remove dust and acidic substances to achieve the effect of flue gas purification. Through the above settings, pollutants such as dioxins, VOCs, fly ash, SO2 and other pollutants in the flue gas are effectively resolved, the effect of flue gas purification is achieved, and the cost of flue gas treatment is saved. In addition, the waste heat exhaust device introduces the flue gas in the high temperature zone into the furnace. When the calorific value of the material burned in the furnace is extremely low, the flue gas in the high temperature zone can provide a suitable and stable heat source for the furnace to ensure the stable operation of the incinerator. Thus, the effect of garbage disposal is improved.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

1 is a schematic structural diagram of a waste incineration treatment system provided by an embodiment of the present invention;

Fig. 2 is the first structural representation of the incinerator provided by the embodiment of the present invention;

3 is a schematic structural diagram of a first flue gas and thermal circulation system of an incinerator provided in an embodiment of the present invention;

4 is a schematic structural diagram of a material system of an incinerator provided by an embodiment of the present invention;

5 is a schematic structural diagram of a stirring device of an incinerator provided in an embodiment of the present invention;

6 is a schematic diagram of a cooling structure of a stirring device provided in an embodiment of the present invention;

7 is a schematic structural diagram of a pneumatic stirring system provided by an embodiment of the present invention;

8 is a schematic cross-sectional structural diagram of an edge-feed furnace provided by an embodiment of the present invention;

9 is a schematic cross-sectional structural diagram of a center feeding furnace provided by an embodiment of the present invention;

10 is a schematic diagram of the bottom plate structure of an edge-feed furnace provided by an embodiment of the present invention;

11 is a schematic diagram of the bottom plate structure of the center feeding furnace provided by an embodiment of the present invention;

12 is a schematic cross-sectional structural diagram of another edge-feed furnace provided by an embodiment of the present invention;

13 is a schematic cross-sectional structural diagram of another central feeding furnace provided by an embodiment of the present invention;

14 is a schematic diagram of a second structure of an incinerator provided in an embodiment of the present invention;

FIG. 15 is a schematic structural diagram of a second type of flue gas and heat circulation system of an incinerator according to an embodiment of the present invention.

Detailed ways

The invention discloses a waste incineration treatment system, so as to improve the waste treatment effect and save the cost of flue gas treatment.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in FIGS. 1-15 , an embodiment of the present invention provides a waste incineration treatment system, including a tunnel kiln 1 and an incinerator 4; the incinerator 4 includes an incinerator main body, and the incinerator main body has a furnace chamber and a total flue gas discharge port 409; The tunnel kiln 1 includes a main structure of the tunnel kiln, an incinerator tail gas introduction device 115 and a waste heat exhaust device; the main structure of the tunnel kiln is divided into a plurality of working zones from the kiln head to its kiln tail, and the plurality of working zones include at least one high temperature The incinerator exhaust gas introduction device 115 introduces the flue gas discharged from the flue gas general discharge port 409 into the main body of the burning tunnel kiln, and the waste heat exhaust device introduces the flue gas in the high temperature zone into the furnace.

In the waste incineration treatment system provided by the embodiment of the present invention, the flue gas exhaust port 409 is introduced into the main body of the tunnel kiln through the incinerator tail gas introduction device 115, and the waste heat is utilized for the flue gas discharged from the flue gas exhaust port 409, and, The flue gas containing dioxins, dust, VOCs and acidic substances enters the main body of the tunnel kiln, and the dioxins and VOCs are fully decomposed under the high temperature oxidation environment in the main body of the tunnel kiln. The wet brick will absorb and remove the powder and acidic substances to achieve the effect of flue gas purification. Through the above settings, pollutants such as dioxins, VOCs, fly ash, SO2 and other pollutants in the flue gas are effectively resolved, the effect of flue gas purification is achieved, and the cost of flue gas treatment is saved. In addition, the waste heat exhaust device introduces the flue gas in the high temperature zone into the furnace. When the calorific value of the material burned in the furnace is extremely low, the flue gas in the high temperature zone can provide a suitable and stable heat source for the furnace to ensure the stable operation of the incinerator. Thus, the effect of garbage disposal is improved.

The incinerator 4 also includes a stirring device 405 and a feeding bin 401 arranged on the top of the main body of the incinerator; the main body of the incinerator includes a multi-layer furnace chamber arranged from top to bottom, and there is a downward flow for the material and an upward flow for the flue gas between two adjacent furnace chambers. The main body of the incinerator is divided into a drying area 402, a combustion area 403 and a cooling area 404 from top to bottom, and the drying area 402, the combustion area 403 and the cooling area 404 all have one or several layers of furnaces; the feeding bin 401 is provided with On the top of the main body of the incinerator, the discharge port of the feeding bin 401 is communicated with the first layer of the furnace of the incinerator main body; the stirring device 405 includes a plurality of stirring components 452, and the plurality of stirring components 452 are arranged one-to-one with the multi-layer furnace.

Since the main body of the incinerator includes a multi-layer furnace set from top to bottom, there is a communication structure between two adjacent furnaces for the material to descend and the flue gas to ascend. Therefore, the material enters the main body of the incinerator through the discharge port of the feeding bin 401 After the first layer of the furnace is moved, under the action of the stirring component 452, it moves to the next layer of the furnace at a certain moving speed. The slag is discharged through the bottom chamber of the incinerator. By setting up multiple furnace chambers, the space for processing materials is effectively increased, thereby increasing the amount of garbage disposal. The incinerator includes a drying zone 402 , a combustion zone 403 and a cooling zone 404 . It can be understood that the drying zone 402, the combustion zone 403 and the cooling zone 404 are divided according to the moisture content of the material, the composition of the flue gas and the temperature of the flue gas, and have the same furnace structure. Therefore, it is possible to adjust the working conditions and states of the furnace chambers of each layer according to the composition of the materials to be burned, so that the furnace chambers are located in the drying zone 402, the combustion zone 403 or the cooling zone 404, and then the drying zone 402, the combustion zone 403 and the cooling zone can be adjusted. The function of the number of furnace layers in the zone 404 is to achieve complete drying and complete combustion of the material, and to ensure the stable operation of the incinerator. Through the above setting, the effect of garbage disposal is effectively improved.

The slag produced by the incinerator 4 burns completely, and its properties are similar to fly ash. The slag is used as a raw material for the production of sintered bricks in the tunnel kiln 1, thereby improving economic benefits.

In the waste incineration treatment system provided by the embodiment of the present invention, the incinerator 4 can be applied to the combustion treatment of various solid wastes. Such as urban domestic waste, kitchen waste, agricultural and forestry waste, sludge, industrial sludge, medical waste, etc.

Under the condition of not reducing the material handling capacity, the working parameters of the furnace chambers of each layer are adjusted, and the number of furnace chamber layers in the drying zone 402 is increased, so as to achieve the purpose of prolonging the drying time, thereby realizing the complete drying of the materials.

Through various monitoring methods, such as monitoring flue gas composition, furnace working parameters and manual inspection, it is found that the materials in the cooling zone 404 are not completely burned, and the number of furnace layers in the combustion zone 403 can be adjusted to ensure complete combustion of the materials.

It will be appreciated that the cooling zone 404 is located at the bottom of the incinerator. A slag discharge port 406 is provided at the bottom of the incinerator, and the slag discharge port 406 communicates with the furnace chamber at the bottom of the cooling zone 404 . The slag discharged through the slag discharge port 406 can be transported to the brick blank production workshop as the ingredients of building bricks. In addition, the total flue gas discharge port 409 is arranged on the top of the incinerator, so as to discharge the flue gas after the incineration of garbage in the multi-layer furnace. One or more feeding ports can be set, and multi-channel uniform feeding can be realized according to the processing scale and actual process needs.

Among them, above the main body of the incinerator is the feeding area, and the feeding area has a plurality of temporary storage facilities such as feeding bins 401, so that the materials such as garbage can be uniformly and controllably fed into the main body of the incinerator continuously.

Preferably, the drying zone 402, the combustion zone 403 or the cooling zone 404 may all have multiple layers of furnace chambers. The principle of setting the total number of layers of the furnace of the main body of the incinerator increases with the increase of the amount of processed materials.

In this embodiment, the multi-layer furnace includes an edge-feeding furnace and a center-feeding furnace that are arranged crosswise; the feeding opening of the edge-feeding furnace is located at the top edge of the edge-feeding furnace, and the discharging opening of the edge-feeding furnace is located at the bottom center; The feeding port of the charging furnace is located at the top center, and the discharging port of the central charging furnace is located at the bottom edge. Through the above arrangement, the flow path of the material in the incinerator is increased, and the effect of garbage treatment is further improved.

Further, the total number of layers of the furnace chamber of the main body of the incinerator is an even number. In this embodiment, the furnace chamber of the first layer is the edge feeding furnace chamber, and the bottom furnace chamber is the center feeding furnace chamber.

For the consideration of uniform feeding, the first layer of furnace is the edge feeding furnace. Wherein, the feeding bin 401 may have multiple feeding ports; or there may be multiple feeding bins 401 , and each feeding bin 401 has one or more feeding ports. The feeding openings of the edge-feeding furnace can be multiple and correspondingly connected with the discharging openings of the feeding bin 401 , so that the materials can enter the furnace along the top edge of the edge-feeding furnace, and then stir in the stirring component 452 . Or under the action of the bottom surface of the furnace, it flows to the discharge port of the edge-feed furnace at the bottom center of the edge-feed furnace.

In other edge-feeding furnaces (excluding the first layer of furnaces), the furnace as a whole is a cylinder, the upper part of the furnace is a top plate, the edge of the furnace is a furnace wall, the bottom of the furnace is a bottom plate, and the stirring shaft 451 of the stirring device 405 is arranged in the center of the furnace, the bottom plate. There is a through hole for the stirring shaft 451 to pass through. The diameter of the through hole is larger than the diameter of the stirring shaft 451. The outer wall of the stirring shaft 451 and the inner wall of the through hole form a discharge port for the edge feeding furnace.

The top plate of the edge feeding furnace is provided with a feeding port of the edge feeding furnace, the feeding port is located at the edge of the top plate close to the furnace wall, and multiple feeding ports are set according to the material handling capacity. the edge of the top plate. The material enters the feeding port of the furnace chamber of this layer from the discharge port of the upper furnace chamber (central feeding furnace chamber), and the material is dried, burned or cooled in the furnace chamber of this layer. Center toggle.

The discharge opening of the edge-fed furnace is located in the center of its bottom plate. The material falls into the central feeding furnace through the feeding opening.

For the consideration of aggregated material discharge, the bottom furnace is the central feeding furnace. The feeding port of the furnace of this layer is located at the top center, that is, the material enters the feeding port of the furnace of this layer from the discharge port of the upper furnace (edge feeding furnace), and the stirring shaft 451 controls the stirring assembly 452 to transfer the material from the center of the furnace. Swipe towards the edge of the hearth. A slag discharge port 406 is arranged on the bottom plate of the furnace of this layer, so the material is discharged from the slag discharge port 406 .

In other center feeding hearths (excluding the bottommost hearth), the hearth is a cylinder as a whole, the upper part of the hearth is a top plate, the edge of the hearth is a furnace wall, the bottom layer of the hearth is a bottom plate, and the stirring shaft 451 of the stirring device 405 is arranged in the center of the hearth, and the top plate is There is a through hole for the stirring shaft 451 to pass through, the diameter of the through hole is larger than that of the stirring shaft 451, and a feeding port of the central feeding furnace is formed between the outer wall of the stirring shaft 451 and the inner wall of the through hole.

The bottom plate of the central feeding furnace is provided with a feeding port of the central feeding furnace, and the feeding port is located at the edge of the bottom plate close to the furnace wall. The feeding port is set up according to the material handling capacity. the edge of the base plate. The material enters the feeding port of the furnace chamber of this layer from the discharge port of the upper furnace chamber (edge feeding furnace chamber). The material is dried, burned or cooled in the furnace chamber of this layer. The stirring shaft 451 controls the stirring component 452 to move the material from the center of the furnace chamber to the furnace chamber Edge toggle.

The discharge opening of the bottom plate of the central feeding furnace is located at the edge of the bottom plate. The material falls into the edge feeding furnace through the discharge opening of the bottom plate.

It can be understood that, between an edge feeding furnace arranged from top to bottom and an adjacent central feeding furnace, the bottom plate of the edge feeding furnace is connected with the top plate of the central feeding furnace. The discharge opening on the bottom plate of the edge-feeding furnace is aligned with the feeding opening on the top plate of the center-feeding furnace; The hole in the center is used as the discharge port of the edge feeding furnace and the feeding port of the center feeding furnace.

Similarly, between a central feeding furnace arranged from top to bottom and an edge feeding furnace adjacent to it, the bottom plate of the central feeding furnace is connected with the top plate of the edge feeding furnace. The discharge opening on the bottom plate of the center feeding furnace is aligned with the feeding opening on the top plate of the edge feeding furnace; The hole arranged on the edge is used as the discharge port of the center feeding furnace and the feeding port of the edge feeding furnace.

In order to facilitate the stirring operation, the stirring device 405 further includes a stirring shaft 451 and a driving device 453 for driving the stirring shaft 451 to rotate; a plurality of stirring assemblies 452 are arranged along the axial direction of the stirring shaft 451 . The stirring shaft 451 is driven by the driving device 453 to rotate, and then a plurality of stirring components are driven to rotate with the axis of the stirring shaft 451 as the center line, so as to realize the operation of stirring the materials in the multi-layer furnace, effectively simplifying the structure of the stirring device 405 . Of course, the stirring device 405 can also be set to other structures, for example, multiple driving devices are provided, and the multiple driving devices correspond to the multiple stirring assemblies one-to-one and drive the stirring assemblies to operate.

Preferably, the stirring shaft 451 is arranged perpendicular to the horizontal plane along the center of the incinerator, and the stirring shaft 451 is driven to rotate by the driving device 453, thereby causing the stirring assembly 452 to rotate horizontally.

The stirring shaft 451 is located in the center of the incinerator and is arranged perpendicular to the horizontal plane, and the stirring shaft 451 is located at the bottom of each layer of the furnace chamber to assemble the stirring assembly 452 .

In this embodiment, the stirring assembly 452 includes a plurality of stirring arms arranged along the circumferential direction of the stirring shaft 451. The stirring arms can be in the form of rake arms, and stirring rake teeth are hung on the lower edge of the rake arms, and the shape of the stirring rake teeth depends on the layer The material in the furnace is determined by the inward or outward movement, that is, when the stirring shaft rotates, the rake teeth move the material to the furnace or outside the furnace to the next layer of the furnace.

It is also possible to strengthen the rake arm structure for the mesh connection. That is, the mesh reinforcement structure is arranged on the stirring arm to prevent breakage and enhance the heat dissipation effect. The stirring arms are preferably arranged in an even number symmetrically, so as to strengthen the stirring force and control the moving direction and speed of the material.

The main body of the incinerator is preferably a cylindrical structure. Therefore, each layer of the furnace is a separate cylindrical chamber. Since the stirring assembly 452 rotates with the axis of the stirring shaft 451 as the centerline, by adjusting the stirring assembly 452 along the radial direction of the furnace The size (ie the length of the stirring arm) enables the stirring assembly 452 to effectively stir the materials in the furnace.

The stirring shaft 451 and the stirring assembly 452 are provided with mutually communicating cooling channels; one end of the stirring shaft 451 has a cooling medium inlet 4511 , and the other end of the stirring shaft 451 has a cooling medium outlet 4512 .

The stirring shaft 451 and the stirring assembly 452 are located inside the incinerator. Due to the contact with materials and flue gas, they need to work under the working conditions of the maximum temperature of 1500 ° C. In order to ensure the service life, the stirring shaft 451 and the stirring assembly 452 need to be cooled. Reduce the cost and ensure the operation stability of the incinerator.

The cooling channel in the stirring shaft 451 is communicated with the cooling channel in the stirring assembly 452. When the incinerator is operated or repaired, the cooling medium is introduced into the cooling medium inlet 4511 at one end of the stirring shaft 451, and the cooling medium passes through the cooling medium in the stirring shaft 451. The cooling channel in the channel and the stirring assembly 452 flows out from the cooling medium outlet 4512 at the other end of the stirring shaft 451 , thereby realizing the cooling effect of the stirring shaft 451 and the stirring assembly 452 . Preferably, one end of the stirring shaft 451 is the bottom end, and the other end of the stirring shaft 451 is the top end.

The cooling medium can be cooling air, cooling water or cooling steam.

In this embodiment, for the convenience of adjustment and setting, the furnace chambers of the combustion zone 403 all have a heat source combustion chamber or a heat source combustion chamber interface 412 to provide the furnace chamber with fresh air required for material combustion and an external heat source required to maintain the furnace chamber temperature. It can be understood that the heat source combustion chamber interface 412 is used to connect with an external heat source combustion chamber. Each layer of the furnace can be provided with multiple heat source combustion chamber interfaces 412, that is, multiple heat source combustion chamber interfaces 412 are connected to multiple external heat source combustion chambers; each layer of the furnace can also be provided with a heat source combustion chamber interface 412. Through the above arrangement, the furnace chamber of the combustion zone 403 can be adjusted. In this embodiment, the first layer of furnace hearth is located in the drying zone 402 , the bottommost furnace chamber is in the cooling zone 404 , and the intermediate furnace chambers between the first layer of furnace hearth and the bottommost layer of furnace hearth may be in the combustion zone 403 .

In this embodiment, after the material enters the incinerator, the fresh air for combustion is fed into the incinerator from the heat source combustion chamber or the interface 412 of the heat source combustion chamber, and the hot flue gas generated in the combustion zone 403 enters the drying zone upward through the feeding hole of the furnace. In the furnace chamber 402, the high-moisture materials in the drying area 402 are evaporated and dried by the hot flue gas in the lower combustion area 403, and enter the combustion area 403 for combustion; after the flue gas passes through the drying area 402, it is discharged from the total flue gas discharge port to Waste heat boiler for waste heat power generation.

External heat sources include direct input of coal, natural gas, kerosene, heavy oil and other fossil fuels to support combustion, as well as compensation hot air provided by external equipment such as hot blast stoves.

A compensation port 4141 for supplementing fresh air and heat source and an air inlet duct 414 connecting the compensation port 4141 are arranged on the furnace wall of the furnace; The branch pipes are connected to the compensation ports 4141 in one-to-one correspondence. It is connected to the external equipment for supplementing fresh air and heat source through the air inlet main pipe, so that the hot air, fresh air and other heat sources can be directly supplemented into the furnace through the compensation port 4141 through the air inlet pipe 414 . In this embodiment, the waste incineration treatment system further includes a waste heat exhaust device for drawing out the flue gas in the interlayer of the working belt, and the outlet of the waste heat exhaust device is connected to the inlet of the air inlet main pipe.

The compensation port 4141 of each layer of the furnace is used as a fuel compensation port and a fresh air compensation port. With the compensation heat source, in addition to the hot air compensation method, the accompanying fuel (gas, natural gas, coal, heavy oil) compensation port and fresh air compensation port (or combustion chamber, to prevent excessive changes in the flue gas composition in the furnace layer in extreme cases), effectively ensure that every The temperature, pressure and other parameters of the layer furnace are within the designed process control range.

Further, each furnace chamber has an independent air outlet 4151 . Each layer of the furnace is provided with an independent smoke outlet 4151. The main function of the smoke outlet 4151 is to control parameters such as flue gas composition, temperature and pressure of the layer of furnace. By continuously supplementing the heat source and fresh air, the flue gas exceeding the design and control parameters is discharged, and the purpose of maintaining the stable working condition of the furnace is achieved.

The incinerator 4 further includes an exhaust duct 415 , which connects the exhaust port 4151 of the furnace and the total exhaust port 409 of the flue gas of the incinerator 4 . Through the above arrangement, it is convenient to realize the centralized discharge of flue gas, and to facilitate subsequent processing of the discharged gas (eg, discharge to the waste heat boiler).

A heat circulation pipe 411 is provided between the air outlet 4151 of the combustion zone 403 and the inlets of the drying zone 402 and the cooling zone 404 . In order to reuse the waste heat of flue gas inside the furnace, the incinerator 4 provided in the embodiment of the present invention has the effect of multi-path heat utilization of internal heat circulation and external heat source supplementation. Reuse of internal flue gas waste heat is an important guarantee measure and realization means for incinerator 4 to be efficient and stable. The exhaust port 4151 of each layer of the furnace is connected to the total flue gas exhaust port 409 through the exhaust duct 415, so as to realize centralized emission. The flue gas from the exhaust port 4151 of each layer of the furnace in the combustion zone 3 has two flow directions, one is to connect to the total flue gas discharge port 409, and the other is to lead the high-temperature flue gas of this layer of furnace to the drying zone 402. And the inlet of the furnace chamber of the cooling zone 404, that is, the exhaust port 4151 of the furnace chamber of the combustion zone 403 is communicated with the inlet of the furnace chamber of the drying zone 402 and the cooling zone 404 through the thermal circulation pipe 411, wherein, the inlet of the furnace chamber can be the above-mentioned heat source to support combustion The chamber interface 412, the compensation port 4141 or the circulation port machined directly on the furnace wall of the furnace. Wherein, the flow direction and flow rate of the flue gas flowing out of the exhaust port 4151 can be controlled by setting a valve.

Since the materials processed by the incinerator 4 do not require or only require very preliminary pretreatment means, the specifications and components of the materials to be processed are very different. When the moisture content of the material encountered is very high, and the incinerator 4 cannot achieve the purpose of drying and completely burning the material according to normal operation, the drying intensity of the drying zone 402 can be maintained or adjusted and the drying time can be extended to achieve the purpose of normal operation. Wherein, prolonging the drying time is to increase the number of furnace layers in the drying zone 402 . To maintain the drying strength is to ensure the temperature of the drying flue gas in the drying zone 402. The hot flue gas in the lower furnace chamber of the combustion zone 403 and/or the upper layer of the cooling zone 404 can be directly injected into the drying zone 402 to keep the furnace chambers of each layer of the drying zone 402. temperature.

Each layer of the furnace is provided with access holes 413 . The access hole 413 can also be a working door. Among them, several inspection holes 413 can be set on the outside of each layer of the furnace. The functions of the inspection holes 413 include: for observing the drying, combustion and cooling of materials in the furnace, overhauling, maintaining and replacing the mechanical facilities in the furnace, and manually checking and processing the furnace. Abnormal or abnormal combustion materials, etc. Therefore, the inspection hole 413 is used for observation, maintenance and emergency control of the working condition exhaust hole in the kiln. The inspection hole 413 can observe the structure and working conditions of mechanical moving parts such as stirring shaft 451, stirring arm and pneumatic stirring system 420 in the furnace, and observe the drying state of materials. The stirring arm and the pneumatic stirring system 420 are inspected and cleaned online from the inspection hole 413, so as to achieve the purpose of repairing without stopping the machine.

As shown in FIG. 8 and FIG. 9 , the incinerator 4 further includes a pneumatic stirring system 420 provided at the bottom of the non-bottommost furnace chamber. The non-bottommost furnace chamber is the furnace chamber except the bottommost furnace chamber of the multi-layer furnace chamber in the main body of the incinerator. The pneumatic stirring system 420 includes a fresh air input pipe 423 and a pneumatic stirring hole connecting the fresh air input pipe 423 and the furnace to supply air to the bottom of the furnace, and the pneumatic stirring hole is connected with the fresh air input pipe 423 and the furnace. The air is supplied to the fresh air input pipe 423 of the pneumatic stirring system 420 through the external air supply device, so that the pneumatic stirring holes of the pneumatic stirring system 420 supply air to the bottom of the furnace, preventing the material on the bottom plate from being hardened or agglomerated due to the inability of the stirring assembly 452 to stir. phenomenon occurs. In addition, the pneumatic stirring holes supply air from the bottom plate of the furnace, so that the incinerator 4 has certain characteristics of a boiling furnace. That is, the material can be fluidized to a certain extent, so that the efficiency is higher.

In this embodiment, the gas transported in the fresh air input pipeline 423 may be compensation hot air, air or internal circulating hot air (burning layer/burning layer to drying layer) drawn from a brick-burning tunnel kiln or other kilns (hot blast stoves). , Blow and loosen the unstirred garbage material at the bottom, move the garbage material and help the material to burn, and prevent the garbage material at the bottom and the furnace wall from agglomerating and adhering to the furnace.

Preferably, a plurality of strip-shaped or hole-shaped or sieve-shaped pneumatic stirring holes are evenly distributed on each layer of the furnace bottom plate, and the air source of the pneumatic stirring system 420 comes from the heat source combustion chamber or the fresh air or hot air from the heat source combustion chamber interface 412, or additional Set up air supply equipment.

In order to improve the service life, the pneumatic stirring system 420 includes a fresh air input pipe 423 and heat-resistant layers 421 arranged on both sides of the fresh air input pipe 423; the gas d in the fresh air input pipe 423 can flow out to the bottom of the furnace through the heat-resistant layer 421.

In order to prevent the fresh air input duct 423 from affecting the work inside the furnace, the fresh air input duct 423 is located between the bottom plate of the furnace and the top plate of the next furnace. In this embodiment, both the bottom plate and the top plate of the furnace are heat-resistant layers 421 .

The incinerator 4 also includes a cooling pipe 422 disposed between the bottom plate of one furnace chamber and the top plate of the next furnace chamber. By setting the cooling pipeline 422, it is convenient to pass the cooling medium into the cooling pipeline 422, so that the cooling pipeline 422 and the bottom plate and the top plate of the furnace are cooled by heat exchange, thereby controlling the temperature of the material of the incinerator 4, and prolonging the temperature of the incinerator 4. service life. Among them, if the steam c for cooling is introduced (the cooling medium can be water, steam, gas, oil, etc., which is determined according to the working conditions in the furnace), the efficiency of waste heat utilization can be further improved.

The cooling system (stirring shaft 451, stirring assembly 452 and the above-mentioned cooling pipeline 422) also utilizes a heat exchange device as part of the waste heat. That is, after cooling and absorbing heat, the cooling medium in the cooling channel of the stirring shaft 451 and the stirring assembly 452 and the cooling medium in the cooling pipeline 422 can be used as a medium for waste heat recovery to utilize the heat absorbed by heat exchange.

Further, the cooling pipe 422 is located above the fresh air input pipe 423 . Through the above arrangement, the cooling pipeline 422 is close to the bottom plate of the furnace, which effectively improves the cooling effect.

As shown in FIG. 10 and FIG. 11 , the cooling pipeline 422 and the fresh air input pipeline 423 are both serpentine tubes, the bottom plate (heat-resistant layer 421 ) of the furnace is divided into a plurality of fan-shaped units, and each fan-shaped unit corresponds to a set of cooling pipelines 422 and fresh air input duct 423, thereby effectively improving the effect.

As shown in FIG. 12 and FIG. 13 , a cooling branch pipeline may also be provided inside the furnace wall of the furnace, the cooling branch pipeline is vertically arranged, and the cooling branch pipeline is communicated with the cooling pipeline 422 . An outlet can also be provided on the branch pipeline and the cooling pipeline 422, so that the cooling medium flows out of the furnace.

As shown in FIG. 14 and FIG. 15 , the incinerator 4 further includes a secondary combustion chamber 410 , and the total flue gas discharge port 409 of the incinerator 4 is the outlet of the secondary combustion chamber 410 . Since the flue gas containing a large amount of VOCs is directly discharged to the waste heat boiler, it will not produce a good waste heat utilization effect, and it will easily affect the efficiency and life of the waste heat boiler. Therefore, by setting the secondary combustion chamber, the flue gas discharged from the main body of the incinerator enters the secondary combustion chamber to fully decompose the VOCs in the exhaust gas of the incinerator, and then is discharged through the total flue gas discharge port 409 . Through the above settings, while solving the emission of VOCs, the heat generated increases the temperature of the flue gas to a level where dioxins can be completely decomposed, further reducing the cost of subsequent flue gas treatment.

Further, a combustion-assisting gas pipe 416 for supplying combustion-assisting gas to the secondary combustion chamber 410 is also included. Wherein, the inlet of the combustion-supporting gas pipe 416 can be connected with the equipment for providing the combustion-supporting gas.

It can also be arranged in another secondary combustion chamber 408 as shown in Figures 2 and 3. Another secondary combustion chamber 408 is located on the flue gas main discharge pipe, and the flue gas in the flue gas main discharge pipe passes through another secondary combustion chamber. The chamber 408 is then discharged from the total flue gas discharge port 409 .

In this embodiment, since the secondary combustion chamber 410 is arranged on the top of the incinerator body, the feeding port 401 of the feed bin 401 is arranged at the side of the furnace chamber of the first layer of the incinerator body. material.

The main point of the present invention for drying materials efficiently is that the temperature of the drying flue gas is greatly improved. In the present invention, the combustion zone 403 provides stable high-temperature flue gas from bottom to top to evaporate the moisture in the material in the drying zone 402 (the primary air temperature provided by the grate furnace is generally 180°C, and the flue gas temperature in the drying layer of the grate furnace is not high. At 150 °C, the highest point of the flue gas temperature above the combustion layer of the grate furnace can reach 1400 °C). It accelerates the evaporation rate of water vapor, accelerates the precipitation of volatile matter in the material, and also accelerates the pyrolysis of the material. Unlike the grate furnace, which is dried by the recirculation effect of the flue gas at the front of the furnace, the present invention not only has the effect of the convection of the drying flue gas and the radiation in the furnace, which is several times higher than that of the grate furnace, but also the internal and external hot air circulation ensures the drying quality. .

In addition, there is no need to increase or decrease the proportion of fossil fuels according to different moisture content and different components of garbage, saving external supplementary energy.

The above-mentioned incinerator 4 can be adapted to the combustion treatment of various solid waste materials, including municipal solid waste, agricultural and forestry solid waste, sludge, medical waste, and biomass. Incinerator 4 operates stably: multi-stage furnaces with the same structure are used for drying, combustion, and ember cooling. The temperature, load and pressure in each stage of the furnace can be independently controlled, which can effectively control the normal operation of each stage of the furnace. Single-stage furnace multi-means temperature adjustment function: By supplementing hot air, fossil fuels, and fresh air, the temperature in the furnace is controlled. Keep each stage of the furnace in normal operation. Ease of maintenance: furnace equipment maintenance can be performed online. There are several inspection ports 413 on each floor, and the furnace maintains negative pressure. In special cases, the stirring device 405 inside the furnace fails and the charge is hardened. Rewire replacement and maintenance of the hardened area in the furnace can be performed. High drying efficiency: the temperature of flue gas in the drying layer is high, and through the circulation of internal hot flue gas, circulation of hot flue gas and external heat source compensation, the drying process is quantitatively controlled, so that the material can reach the condition of full combustion, compared with the mechanical grate furnace. The drying of materials, the drying process and the drying boundary are clearer and more efficient. The incinerator 4 has certain characteristics of a boiling furnace. Due to the distributed pneumatic stirring system 420 at the bottom of each stage of the furnace, independent supply of fresh air can be achieved. The fresh air passes through the bottom of the material to the top of the furnace, and the material is burned more fully. It can effectively control the problems of "deflagration" and "stacking combustion": independent air outlet facilities are set up in each layer of the furnace. The facility adjusts the flue gas composition in the furnace, and discharges the components that cause the kiln to fail to operate normally, such as CO that suddenly increases in the kiln under special working conditions. Simple operation, high combustion efficiency and low failure rate. The main body of the incinerator is composed of the furnace wall and each layer of the furnace chamber. The operation of the incinerator 4 is controlled by various medium pipes, valves and electrical instruments located outside the kiln. Compared with mechanical grate incinerators, combustion is more complete and there are fewer operation and maintenance items. In addition to municipal solid waste, the incinerator 4 provided by the embodiment of the present invention can process various solid wastes in different forms, such as sludge, industrial sludge, agricultural and forestry waste, medical waste, etc., and has a wider processing range. In order to apply to more fields, the same incinerator handles different materials, the design of the incinerator has a certain redundancy, and the purpose of different combustion is achieved by adjusting the number of furnace layers in each area and the working conditions of the corresponding furnace. Small footprint: Modular design, by increasing the number of furnace layers, the amount of garbage disposal can be increased while keeping the area of the furnace layer unchanged. No need for material pretreatment or pretreatment investment and low operating cost. There is no requirement for the moisture content of the material, and the size of the material is not larger than the width between the rake teeth of the stirring arm.

The embodiment of the present invention provides a tunnel kiln, which includes a main structure of the tunnel kiln and a flow guiding device. The main structure of the tunnel kiln is divided into a plurality of working zones from the kiln head to its kiln tail, each working zone has a kiln chamber and an interlayer, and the kiln chamber and the interlayer are connected through smoke holes; the first working zone is arranged in the plurality of working zones and the second working zone, the temperature of the flue gas in the first working zone is greater than that in the second working zone; the flow guiding device guides the flue gas in the interlayer corresponding to the first working zone into the kiln chamber corresponding to the second working zone middle.

In the tunnel kiln provided by the embodiment of the present invention, the inlet of the sintered brick wet billet is the kiln head of the main structure of the tunnel kiln, and the outlet of the cooled sintered brick is the kiln tail of the main structure of the tunnel kiln. The main structure of the tunnel kiln is divided into a plurality of working zones from the kiln head to the kiln tail, and the green sintered bricks pass through the multiple working zones in turn to form sintered bricks and then move out of the tunnel kiln from the kiln tail of the main structure of the tunnel kiln. Since the main structure of the tunnel kiln includes a kiln chamber and an interlayer, the kiln chamber and the interlayer are connected through smoke holes. Therefore, the interlayer provides a buffer, buffer and transmission path for the flue gas at the corresponding temperature in each working zone of the kiln chamber. By setting the interlayer and the kiln chamber, and connecting the kiln chamber and the interlayer through the smoke hole, the flue gas of the corresponding temperature in the working zone of the tunnel kiln is stored in the interlayer. The flue gas can maintain the corresponding temperature and provide the corresponding heat source for the internal thermal cycle of the working zone; since the flue gas is exported from the interlayer, the stable operation of the working zone (kiln chamber) under normal working conditions is ensured; The flue gas in the interlayer corresponding to the belt is introduced into the kiln chamber corresponding to the second working zone, so as to adjust the kiln chamber temperature of the second working zone to ensure that each working zone is in the specified operating parameters. Through the above settings, by adjusting the operating parameters of the working belt (temperature, air volume and air speed, etc.), the wet blanks of different varieties of sintered bricks can be treated correspondingly to ensure the quality of the sintered bricks.

As the post-processing equipment of the waste incineration plant, it realizes the recycling of waste. Through the control and adjustment of the working conditions of each part of the tunnel kiln, the production of different varieties of brick products can be realized; the construction cost is low, and the mechanical equipment is less than that of the secondary burning production line. Low maintenance cost.

The number of the smoke holes may be multiple, and the specific size and number of the smoke holes are set according to actual needs, and will not be described in detail here.

It can be understood that the green sintered bricks pass through the kiln chambers of a plurality of working zones along the kiln head to the kiln end in sequence, and therefore, the kiln chambers of the multiple working zones are connected. The interlayers of multiple working belts can be connected to each other or can be independent of each other. Preferably, the interlayers of a plurality of working belts can be connected on and off, and components such as on-off valves or gates can be arranged between two adjacent interlayers to facilitate the connection and disconnection between two adjacent interlayers. In combination with the above-mentioned components such as valves or gates, the flow guiding function can also be achieved, that is, it can be used as a flow guiding device.

In this embodiment, the main structure of the tunnel kiln includes an outer kiln wall and an inner kiln wall sleeved in the outer kiln wall; the inner side of the inner kiln wall is a kiln chamber, and an interlayer is formed between the outer kiln wall and the inner kiln wall; Inner kiln wall. In this embodiment, the sections of the outer kiln wall and the inner kiln wall may both be U-shaped structures, and the U-shaped structure includes a kiln top wall and two kiln side walls.

A clapboard can also be arranged in the outer kiln wall to divide the inner space of the outer kiln wall into an interlayer and a kiln chamber, and the clapboard has smoke holes.

Further, the interlayer includes a kiln top interlayer located above the kiln chamber and a kiln side interlayer located on the side of the kiln chamber. That is, there are gaps between the kiln top wall and at least one kiln side wall of the outer kiln wall and the outer wall of the inner kiln wall, and the gap forms an interlayer. In this embodiment, the kiln top interlayer communicates with the kiln side interlayer. It is also possible to make the kiln top interlayer and the kiln side interlayer independent of each other.

The interlayer functions as mixing and buffering. The flue gas entering the interlayer first will not directly affect the operation of the kiln room. After the flue gas enters the kiln room, it is purified by high temperature in the kiln room, and harmful substances are absorbed by the bricks and flow into the kiln roof through the kiln side interlayer. mezzanine. Of course, it can also enter the kiln side interlayer through diversion through the kiln top interlayer.

The tunnel kiln provided by the embodiment of the present invention further includes a general exhaust device 112 disposed at the kiln head of the main structure of the tunnel kiln. Finally, all the flue gas passing through the tunnel kiln is exhausted to the atmosphere through the general exhaust fan 112 of the kiln head, so that the flue gas flows in multiple working zones, that is, the flue gas flows from the kiln tail of the tunnel kiln main structure of the tunnel kiln to its kiln head flow in multiple working belts. The general exhaust 112 can be directly connected to the chimney 2 . That is, the outlet of the general exhaust device 112 communicates with the chimney 2 so that the flue gas discharged from the outlet of the general exhaust device 112 is discharged along the chimney 2 .

Wherein, the general exhaust device 112 may be an exhaust fan, or may be other air guide devices.

Further, the tunnel kiln further includes an ambient flue gas induced draft fan 108 arranged at the kiln end of the main structure of the tunnel kiln for introducing ambient flue gas. Through the above arrangement, it is convenient to introduce ambient flue gas into the tunnel kiln.

In order to buffer the flue gas entering the tunnel kiln, preferably, the ambient flue gas induced draft fan 108 is communicated with the interlayer of the kiln tail of the main structure of the tunnel kiln.

In the tunnel kiln provided by the embodiment of the present invention, the plurality of working zones include a moisture exhaust preheating zone 101, a low temperature drying zone 102, a medium temperature drying zone 103, a high temperature drying zone 104, a roasting zone 105, a heat preservation zone 106, and a cooling zone, which are arranged in sequence. 107, the temperature decreases from the roasting zone 105 to the kiln head of the main structure of the tunnel kiln to the kiln tail thereof.

In this embodiment, the working temperature of the moisture removal preheating zone 101 is 20-100°C, and the water vapor in the flue gas is discharged; the working temperature of the low-temperature drying zone 102 is 100-300°C, which removes most of the adsorbed water and the sintered brick wet blanks. Free water; the working temperature of the medium-temperature drying zone 102 is 300-500 °C, to remove the remaining free water and adsorbed water in the adobe, and prevent the residual moisture due to incomplete drying from rapidly gasifying and destroying the brick body; the working temperature of the high-temperature drying zone 104 is 500-500 °C At this time, the crystal water in the brick body is gradually removed, and the organic matter contained in the material begins to burn and decompose, which can bond the material and increase the strength of the brick body; It is in a vitrified state, filling the gaps between the bricks, and further improving the compactness of the bricks; the working temperature of the insulation belt 106 is 600-900 ° C, and the maximum sintering temperature is kept for a period of time, so that the reaction in the bricks tends to be complete; the cooling zone The working temperature of 107 is 100~600℃, stop heating, let the brick body cool in the furnace, and make the brick body structure gradually stabilize.

It can be understood that the temperature range of each working belt is only used as an example; the functions of each working belt can be divided according to different product varieties, so the artificially divided working belt and working parameters are not specifically limited.

Of course, the above-mentioned moisture removal preheating zone 101 , low temperature drying zone 102 , medium temperature drying zone 103 , high temperature drying zone 104 , baking zone 105 , heat preservation zone 106 and cooling zone 107 can also be set to other temperatures. The above-mentioned multiple working zones can also be divided into other working generations. It is only necessary to ensure that the temperature decreases from the roasting zone 105 to the kiln head of the main structure of the tunnel kiln to its kiln tail. The number of temperature zones on both sides of the roasting zone 105 and the The temperature is not limited and is within the protection range.

Preferably, when the high temperature drying belt 104 and/or the roasting belt 105 is the first working belt, the heat preservation belt 106 is the second working belt; /or the flue gas in the interlayer corresponding to the roasting zone 105 is introduced into the kiln chamber corresponding to the insulation zone 106 . Through the above arrangement, the flue gas in the high-temperature drying zone 104 and/or the roasting zone 105 is allowed to enter the heat preservation zone 106 to ensure sufficient flue gas temperature and flue gas volume in the heat preservation zone 106, and to ensure that the bricks in the kiln chamber of the heat preservation zone 106 react with each other. becoming steady.

Of course, in order to ensure the sintering temperature and avoid affecting the working efficiency of the roasting belt 105 , the high temperature flow guiding device 109 may only enter the flue gas in the high temperature drying belt 104 into the heat preservation belt 106 .

Preferably, the flue gas discharged from the total flue gas discharge port 409 is preferably introduced into the roasting zone 105 of the main body of the tunnel kiln. It can be understood that the flue gas entering the roasting zone 105 of the tunnel kiln 1 contains a large amount of VOCs, and the decomposition of VOCs releases a large amount of heat energy, which will not affect the working conditions of the roasting zone 105, and can play the role of waste heat utilization.

In this embodiment, the high-temperature flow guiding device 109 is also used to introduce the flue gas in the interlayer corresponding to the high-temperature drying zone 104 into the kiln chamber at the end of the roasting zone 105 . The sintering temperature is guaranteed by transporting the high-temperature flue gas of the high-temperature drying belt 104 from the interlayer to the kiln chamber at the end of the roasting belt 104 . In this embodiment, the temperature at the junction of the high temperature drying zone 104 and the baking zone 105 is greater than 900°C. In order not to affect the operation of the roasting belt 105, no corresponding thermal cycle device is provided at the roasting belt 105. The flue gas in the interlayer at the junction of the high temperature drying zone 104 and the roasting zone 105 (one end of the high temperature drying zone 104 close to the roasting zone 105 ) can be introduced into the rear end of the roasting zone 105 .

Further, when the high temperature drying belt 104 is the first working belt, the medium temperature drying belt 103 is the second working belt; The air is introduced into the kiln chamber corresponding to the intermediate temperature drying zone 103 . In this embodiment, the flue gas at 500-900° C. in the high-temperature drying belt 104 is transported from the interlayer of the high-temperature drying belt 104 to the kiln chamber of the intermediate-temperature drying belt 103, and the bricks in the intermediate-temperature drying belt 103 serving as the preheating section are thoroughly dried .

In this embodiment, when the medium temperature drying belt 103 is the first working belt, the low temperature drying belt 102 is the second working belt; The flue gas is introduced into the kiln chamber corresponding to the low temperature drying zone 102 . In this embodiment, the flue gas at 300-500° C. in the intermediate temperature drying zone 103 is transported from the interlayer of the intermediate temperature drying zone 103 to the kiln chamber of the low temperature drying zone 102, so as to ensure that the wet bricks in the kiln chamber of the low temperature drying zone 102 finally reach the specified level. moisture content. The process control requirements of the low temperature drying belt 102 emphasize low temperature, large air volume and low air speed, and the working state of the low temperature flow guiding device 111 can be adjusted according to the above control requirements. Since drying and roasting are connected, there is no buffering and turnover between them. The low-temperature flow guiding device 111 has the function of guiding the high-temperature flue gas and mixing fresh air for the corresponding drying area, and the function of supplying a stable heat source to the low-temperature drying zone 102 .

The air mixing function of the low temperature air guide device 111 meets the requirements of the low temperature drying belt 102 for low temperature and large air volume operation.

By controlling the temperature and length of the drying belts (low temperature drying belt 102 , medium temperature drying belt 103 and high temperature drying belt 104 ) and roasting belt 105 , the working conditions of each working belt can be controlled and adjusted. Since there is an internal heat cycle and external heat source supplementation when the temperature is lower than the set parameter, and the flue gas in the corresponding working zone is discharged when the temperature is higher than the set parameter, the working conditions in the kiln can be stably controlled.

The interlayer provides a mixing place for flue gas mixing to meet the working requirements of the roasting zone 105 , the high temperature drying zone 104 and the medium temperature drying zone 103 , and the larger air volume ensures the normal operation of the low temperature drying zone 102 .

In order to utilize the waste heat of each working belt, it also includes a waste heat exhaust device for drawing out the flue gas in the interlayer of the working belt. In this embodiment, the waste heat exhaust device will lead out the flue gas in the interlayer of the working belt, and transport it to the equipment that needs to be applied, such as as a heat source compensation of the incinerator 4 and the like.

In this embodiment, the waste heat exhaust device includes a heat preservation exhaust device 114 and a high temperature drying exhaust device 113; the heat preservation exhaust device 114 is used to draw out the flue gas in the interlayer corresponding to the heat preservation belt 106; the high temperature drying exhaust device 113 is used for It is used to draw out the flue gas in the interlayer corresponding to the high temperature drying belt 104 .

By setting the heat preservation and exhaust device 114, it is convenient to realize the function of providing a heat source to the outside of the tunnel kiln, which is usually used for heat source compensation of the incinerator 4 and the like. Preferably, the thermal insulation and exhaust device 114 communicates with the rear end of the thermal insulation belt 106 . By setting the high temperature drying and exhausting device 113 , the function of providing a heat source to the outside of the tunnel kiln is facilitated, which is usually used for heat source compensation of the incinerator 4 and the like.

In this embodiment, the outlet of the heat preservation and exhaust device 114 and the high temperature drying exhaust device 113 are respectively connected with the combustion-assisting gas pipe 416 for conveying combustion-assisting gas to the secondary combustion chamber 410 and the air inlet main pipe of the air inlet duct 414 . It is also possible to make the outlet of the heat preservation exhaust device 114 and the high temperature drying exhaust device 113 correspond to the compensation ports 4141 on a plurality of furnace chambers with different temperatures (the temperatures in the furnace chambers of the drying zone 402, the combustion zone 403 and the cooling zone 404 are different). In order to provide compensation flue gas according to the needs of the furnace.

Due to the segmented internal waste heat utilization (the waste heat in the high temperature drying zone 104 and the heat preservation zone 106 ), each working section can be adjusted according to the material, formula and variety of the brick, and the temperature and time of drying and roasting can be controlled to meet the The purpose of production stability.

In addition, the high temperature drying air exhaust device 113 and the heat preservation air exhaust device 114 ensure the negative pressure operation of the brick kiln in the baking zone 105 .

Other waste heat exhaust devices may also be provided to communicate with the interlayer of the medium temperature drying zone 103 , the low temperature drying zone 102 , the moisture exhausting preheating zone 101 , the baking zone 105 or the cooling zone 107 . The specific working belt of waste heat flue gas extraction is not limited, it only needs to meet the needs, and it will not be repeated here.

The high temperature drying exhaust device 113 and the heat preservation exhaust device 114 also have another function. When the temperature of the kiln chamber and flue gas of the high temperature drying zone 104 and the heat preservation zone 106 is too high to maintain the normal operation of the tunnel kiln, the high temperature drying and exhaust air can be exhausted. The air device 113 and the heat preservation air exhaust device 114 adjust the temperature of each working zone in the kiln. When the calorific value of the burning material is extremely low, it can provide a suitable and stable heat source for the furnace chamber of each layer of the incinerator to ensure the stable operation of the incinerator.

In addition, the temperature of the kiln chamber and the flue gas of the firing zone 105 is adjusted in combination with the action of the high-temperature flow guiding device 109 . Specifically control the following situations:

1. The heat preservation time of sintered bricks is less than the maximum heat preservation time. After heat preservation, the sintered bricks can reach the standard, so as to prevent the formed crystals from being destroyed by too long heat preservation time, and the compressive strength of the brick body will decrease.

2. The high temperature flue gas is transported to each drying belt (low temperature drying belt 102, medium temperature drying belt 103 and high temperature drying belt 104) through the diversion device. The temperature before and after each drying belt is stable and consistent, and the process operation parameter range of the drying belt is adjusted and guaranteed. To prevent abnormal rapid changes in the temperature, humidity and pressure of various parts in the kiln, causing the whole kiln to be abnormal before and after the kiln.

3. Negative pressure conditions should be met in the roasting zone 105 and the high temperature drying zone 104 .

Further, the high temperature drying belt 104 is provided with a high temperature drying exhaust device 113 for exhausting the flue gas.

The flue gas of the incinerator 4 is introduced into the roasting zone 105 of the tunnel kiln through the incinerator exhaust gas introduction device 115, which effectively improves the exhaust gas treatment effect.

Further, after the exhaust gas of the incinerator 4 is comprehensively utilized by the waste heat device 6, it is passed into the kiln chamber of the roasting zone 105. When the brick is fired, the oxidizing atmosphere in the kiln can reach 1100 ° C, which has the characteristics of long sintering time, sufficient oxidation and complete combustion. Therefore, the exhaust gas purification of the incinerator 4 can achieve the following effects:

1. The tail gas of the incinerator 4 stays in the high temperature area of the roasting zone 105, and the dioxins are completely decomposed;

2. The exhaust gas of the incinerator 4 is completely burned at 1100 ℃ due to the large amount of VOCs generated by the combustion, drying and preheating of the garbage itself, which purifies the exhaust gas of the incinerator 4 and provides additional heat source for the roasting zone 105 to ensure the roasting zone 105. The sintering temperature of the brick inside. In addition, the tunnel kiln replaces the secondary combustion chamber, simplifies the waste incineration process, and reduces the construction cost of the waste incineration plant.

3. The bricks are made alkaline, and the acidic substances in the incinerator 4 are absorbed and neutralized by the alkaline blanks.

In the above-mentioned diversion device, the outside is embodied as various internal circulation fans, and in the kiln, it is embodied as means such as valves, gates and deflectors, which can be replaced and shared with each other. That is, the flow guiding device may be a fan device, and the flow guiding device may also be a device for guiding flue gas formed by a valve, a gate or a flow guiding plate.

The above-mentioned flow guiding device can be an air guiding device or a circulating fan, which are mutually replaceable means. The process of flue gas in the tunnel kiln is to enter the kiln chamber from the top interlayer, and then enter the side interlayer from the kiln chamber (returning is also possible). The role of the interlayer is to mix and buffer the flue gas. The flue gas entering the interlayer first will not directly affect the operation of the kiln room. After the flue gas enters the kiln room, it is purified by high temperature in the kiln room, and harmful substances are absorbed by the bricks. Top mezzanine.

In this embodiment, the waste incineration treatment system further includes a waste heat device 6 ; the total flue gas discharge port 409 is connected to the inlet of the waste heat device 6 , and the incinerator tail gas introduction device 115 is connected to the flue gas outlet of the waste heat device 6 . With the above arrangement, waste heat recovery is ensured. Of course, it can also be used for other heat-demanding equipment, which will not be repeated here.

In order to improve the utilization rate of waste heat recovery, the waste incineration treatment system further includes a gear steam generator 5 connected to the steam outlet of the waste heat device 6 . In addition, the waste incineration treatment system further includes a rotary drying kiln 3 connected to the steam outlet of the waste heat device 6, and the outlet of the rotary drying kiln 3 is connected to the chimney 2 of the waste incineration treatment system.

In this embodiment, when special garbage or waste needs to be pretreated to a certain extent, for example, when the moisture content of the garbage is particularly high, the material can be dried by the rotary drying kiln 3 . Since the drying heat source is the steam generated by the exhaust gas of the incinerator 4 through the waste heat utilization of the waste heat device 6, the materials in the rotary drying kiln 3 are dried by using the steam. A large amount of moisture generated by the drying process in the rotary drying kiln 3 is directly discharged to the atmosphere.

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other.

The above description of the disclosed embodiments enables any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (17)

1. A waste incineration treatment system is characterized by comprising a tunnel kiln (1) and an incinerator (4);

the incinerator (4) comprises an incinerator body, and the incinerator body is provided with a hearth and a smoke main discharge port (409);

the tunnel kiln (1) comprises a tunnel kiln main body structure, an incinerator tail gas introducing device (115) and a waste heat exhaust device; the kiln head of tunnel kiln major structure is divided into a plurality of working bands to its kiln tail, and is a plurality of including at least one high temperature zone in the working band, burning furnace tail gas introducing device (115) will flue gas that total discharge port of flue gas (409) discharged is leading-in burn tunnel kiln major structure, waste heat exhaust device will flue gas in the high temperature zone is introduced furnace.

2. A waste incineration disposal system according to claim 1, wherein the incinerator (4) further comprises a stirring device (405) and a feed bin (401) provided at the top of the incinerator body; the incinerator body comprises a plurality of layers of hearths arranged from top to bottom, and a communicating structure for material descending and smoke ascending is arranged between every two adjacent hearths; the incinerator body is divided into a drying area (402), a combustion area (403) and a cooling area (404) from top to bottom, and the drying area (402), the combustion area (403) and the cooling area (404) are respectively provided with one or more layers of the hearth; the feeding bin (401) is arranged at the top of the incinerator body, and a feed opening of the feeding bin (401) is communicated with the hearth of the first layer of the incinerator body; the stirring device (405) comprises a plurality of stirring components (452), and the stirring components (452) are arranged in one-to-one correspondence with the multiple layers of the hearth.

3. The waste incineration disposal system of claim 2, wherein the plurality of tiers of hearths include edge-feed hearths and center-feed hearths arranged in a cross;

the feeding port of the edge feeding hearth is positioned at the top edge of the edge feeding hearth, and the discharging port of the edge feeding hearth is positioned at the bottom center of the edge feeding hearth; the feeding opening of the central feeding hearth is positioned in the center of the top of the central feeding hearth, and the discharging opening of the central feeding hearth is positioned on the edge of the bottom of the central feeding hearth.

4. The waste incineration system according to claim 2, wherein the stirring device (405) further includes a stirring shaft (451) and a driving device (453) for driving the stirring shaft (451) to rotate;

a plurality of the stirring assemblies (452) are arranged along the axial direction of the stirring shaft (451).

5. The waste incineration system according to claim 4, wherein cooling channels are provided in the stirring shaft (451) and the stirring assembly (452) to communicate with each other;

one end of the stirring shaft (451) is provided with a cooling medium inlet (4511), and the other end of the stirring shaft (451) is provided with a cooling medium outlet (4512).

6. A waste incineration disposal system according to claim 2, wherein the hearths of the combustion zone (403) each have a heat source combustion chamber or heat source combustion chamber interface (412) for providing fresh air for the hearths required for material combustion and an external heat source required for maintaining the temperature of the hearths.

7. The waste incineration system according to claim 2, wherein the furnace wall of the furnace is provided with a compensation port (4141) for supplementing fresh air and heat source and an air inlet pipe (414) connected with the compensation port (4141);

the air inlet pipeline (414) comprises an air inlet main pipe and a plurality of air inlet branch pipes communicated with the air inlet main pipe, and the air inlet branch pipes are correspondingly connected with the compensation ports (4141) one by one;

the waste heat exhaust device leads out the smoke in the working band, and the outlet of the waste heat exhaust device is connected with the inlet of the air inlet main pipe.

8. A waste incineration disposal system according to claim 2, wherein each of the furnaces has an independent exhaust outlet (4151);

also comprises an exhaust duct (415) and a heat circulating pipe (411);

the exhaust duct (415) is connected with the exhaust outlet (4151) and a main flue gas discharge port (409) of the incinerator (4);

the exhaust outlet (4151) of the hearth of the combustion zone (3) is communicated with the inlets of the drying zone (2) and the hearth of the cooling zone (4) through the heat circulating pipe (411).

9. The waste incineration disposal system of claim 1, wherein each of the work belts has a kiln chamber and an interlayer, the kiln chamber and the interlayer being in communication with each other through a smoke hole; the plurality of working bands are provided with a first working band and a second working band, and the temperature of the flue gas in the first working band is higher than that of the flue gas in the second working band;

the tunnel kiln (1) further comprises a flow guide device, and the flow guide device guides the smoke in the interlayer corresponding to the first working zone into the kiln chamber corresponding to the second working zone.

10. The waste incineration disposal system according to claim 9, wherein the plurality of working zones includes a moisture discharge preheating zone (101), a low temperature drying zone (102), a medium temperature drying zone (103), a high temperature drying zone (104), a roasting zone (105), a heat retaining zone (106), and a cooling zone (107) arranged in this order, and the temperature decreases from the roasting zone (105) toward the head of the tunnel kiln main body structure to the tail thereof;

when the high-temperature drying zone (104) and/or the roasting zone (105) is the first working zone, the heat-preserving zone (106) is the second working zone;

the flow guiding device comprises a high-temperature flow guiding device (109), and the high-temperature flow guiding device (109) guides the flue gas in the interlayer corresponding to the high-temperature drying zone (104) and/or the roasting zone (105) into the kiln chamber corresponding to the heat preservation zone (106).

11. The waste incineration disposal system according to claim 10, wherein the incinerator tail gas introduction means (115) introduces flue gas discharged from the flue gas main discharge port (409) into the roasting zone (105).

12. The waste incineration disposal system according to claim 10, wherein the high temperature diversion means (109) is further configured to guide flue gas in the interlayer corresponding to the high temperature drying zone (104) into the kiln chamber at the tail end of the roasting zone (105).

13. The waste incineration system according to claim 9, wherein when the high temperature drying zone (104) is the first operating zone, the medium temperature drying zone (103) is the second operating zone;

the flow guiding device comprises a medium-temperature flow guiding device (110), and the medium-temperature flow guiding device (110) guides the flue gas in the interlayer corresponding to the high-temperature drying zone (104) into the kiln chamber corresponding to the medium-temperature drying zone (103).

14. The waste incineration disposal system according to claim 1, further comprising a chimney (2) and a total exhaust device (112) provided at a kiln head of the tunnel kiln main body structure, an outlet of the total exhaust device (112) being communicated with the chimney (2).

15. The waste incineration disposal system of claim 1, further comprising an environmental flue gas draft fan (108) disposed at a kiln tail of the tunnel kiln main body structure for introducing environmental flue gas;

and the environment flue gas induced draft fan (108) is communicated with the kiln tail of the main body structure of the tunnel kiln.

16. Waste incineration disposal system according to claim 1, further comprising a waste heat device (6);

the total exhaust port of the flue gas (409) is connected with an inlet of the waste heat device (6), and the tail gas introducing device of the incinerator (115) is connected with a flue gas outlet of the waste heat device (6).

17. Waste incineration disposal system according to claim 16, further comprising a gear steam generator (5) connected to a steam outlet of the waste heat device (6);

and/or the rotary drying kiln (3) is connected with a steam outlet of the waste heat device (6), and an outlet of the rotary drying kiln (3) is connected with a chimney (2) of the waste incineration treatment system.

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