CN114811593A - A pyrolysis incinerator and air distribution system - Google Patents

Abstract

The invention discloses a pyrolysis incinerator, comprising: the rotary kiln pyrolysis chamber is used for heating, decomposing and primarily burning organic solid waste; the grate combustion chamber is arranged at the downstream of the rotary kiln pyrolysis chamber and is used for fully combusting the organic solid waste pyrolyzed by the rotary kiln pyrolysis chamber; and the secondary combustion chamber is used for combusting gas generated in the combustion process of the fire grate combustion chamber. The pyrolysis incinerator disclosed by the invention pyrolyzes and primarily incinerates organic solid waste by the rotary kiln pyrolysis chamber with strong material adaptability, and the grate combustion chamber is arranged in the downstream process of the rotary kiln pyrolysis chamber to fully combust the organic solid waste, so that the pyrolysis incinerator is fully combusted and has low heat ignition loss rate while being suitable for materials of various specifications, and gas generated in the grate combustion chamber of the secondary combustion chamber is arranged to decompose harmful substances and enable the smoke to reach the emission standard. The invention also discloses an air distribution system suitable for the pyrolysis incinerator.

Description

A pyrolysis incinerator and air distribution system

technical field

The invention relates to the field of organic solid waste treatment equipment, in particular to a pyrolysis incinerator and an air distribution system.

Background technique

With the revision and implementation of the Law of the People's Republic of China on the Prevention and Control of Environmental Pollution by Solid Waste, the collection of industrial organic solid waste has increased substantially. Incineration is the main method of waste disposal in my country, which has significant economic, environmental and social benefits, and is also an important way to achieve a "waste-free city".

In the existing industrial organic solid waste treatment process, rotary kiln incinerators or grate furnaces are often used for incineration treatment. Among them, the use of rotary kiln incinerator for the treatment of industrial organic solid waste can fully turn the organic solid waste, and has strong adaptability to various types of organic solid waste, but the incineration process requires full air distribution, and Rotary kiln incinerators have a high ignition loss rate; use grate furnaces for industrial organic solid waste treatment, and organic solid wastes are combusted in multiple stages in the drying area, combustion area and ember area on the grate, and are combined with the grate. The air entering the lower part is fully mixed, the combustion efficiency is high, and the rate of thermal reduction is low, but the grate furnace has high requirements on the processing accuracy of the grate, and has poor adaptability to the specifications of organic solid waste. It is necessary to make the organic solid waste stay in the furnace for a long time, and the combustion speed is slower, resulting in higher heat loss.

Therefore, how to fully combust the organic solid waste and reduce the thermal reduction rate of the organic solid waste after combustion is an urgent problem to be solved by those skilled in the art.

SUMMARY OF THE INVENTION

In view of this, the purpose of the present invention is to provide a pyrolysis incinerator, so as to make the combustion of the organic solid waste more sufficient and reduce the rate of reduction on ignition of the organic solid waste after combustion.

Another object of the present invention is to provide an air distribution system for the above-mentioned pyrolysis incinerator, so as to further improve the combustion efficiency of the above-mentioned pyrolysis incinerator.

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

A pyrolysis incinerator comprising:

Rotary kiln pyrolysis chamber, the rotary kiln pyrolysis chamber is used for thermal decomposition and preliminary incineration of organic solid waste;

a grate combustion chamber, which is arranged downstream of the rotary kiln pyrolysis chamber to fully burn the organic solid waste pyrolyzed by the rotary kiln pyrolysis chamber;

A secondary combustion chamber, the secondary combustion chamber is used for burning the gas generated by the grate combustion chamber during the combustion process.

Preferably, in the above-mentioned pyrolysis incinerator, the grate combustion chamber uses a horizontal forward mechanical grate to transport and burn organic solid waste.

Preferably, in the above-mentioned pyrolysis incinerator, the horizontal pushing mechanical grate is divided into a combustion zone and a burning zone, the burning zone is used for rapidly burning organic solid waste, and the burning zone is used for burning organic solid waste For waste residues, the combustion zone and the ember zone can achieve staged combustion through the difference in air supply volume.

Preferably, in the above pyrolysis incinerator, the air supply volume ratio between the combustion zone and the combustion zone is in the range of 3:(2-1.5).

Preferably, in the above pyrolysis incinerator, the secondary combustion chamber includes a medium temperature secondary combustion chamber and a high temperature secondary combustion chamber, and the gas generated in the grate combustion chamber passes through the intermediate temperature secondary combustion chamber and the high temperature secondary combustion chamber in sequence. chamber to achieve multi-stage combustion of gas.

Preferably, in the above pyrolysis incinerator, the temperature in the middle-temperature secondary combustion chamber is 650°C-900°C, and the temperature in the high-temperature secondary combustion chamber is 900°C-1150°C.

Preferably, in the above pyrolysis incinerator, the pyrolysis chamber of the rotary kiln includes a cylinder for providing a place for pyrolysis of organic solid waste, the cylinder is inclined and rotated during operation, and the cylinder is The horizontal inclination is 1%-3%, and the rotating speed is 0.5r/min-3r/min during operation.

Preferably, in the above pyrolysis incinerator, the temperature of the cylinder during pyrolysis of organic solid waste is 550°C-650°C, and the incineration time of organic solid waste in the cylinder is 15min-30min.

Preferably, in the above pyrolysis incinerator, a feeding system and an ash and slag transportation system are further included, and the feeding system is used to supply organic solid waste to the pyrolysis chamber of the rotary kiln, and the ash and slag transportation system The outlet of the grate combustion chamber is communicated to timely deliver the ash and slag produced by the combustion of the grate combustion chamber.

Preferably, in the above pyrolysis incinerator, the feeding system includes a hopper for containing organic solid waste, and the hopper can accommodate organic solid waste with a weight of 12t-21t.

An air distribution system suitable for a pyrolysis incinerator, the pyrolysis incinerator is a pyrolysis incinerator having the technical effects in any of the above-mentioned embodiments, and the air distribution system comprises:

The combustion air system is used to separately distribute air to the area that needs to be burned in the pyrolysis incinerator, so as to realize the full combustion of the organic solid waste and the gas generated by the decomposition of the organic solid waste;

A cooling air system, the cooling air inhales ambient air and passes into the surrounding and top walls of the secondary combustion chamber to prolong the service life of the secondary combustion chamber;

A sealed air system is connected to the kiln tail sealing cooling jacket of the rotary kiln pyrolysis chamber to ensure the tightness of the connection between the rotary kiln pyrolysis chamber and the secondary combustion chamber.

Preferably, in the above air distribution system, the combustion air system includes:

A primary air pipeline, one end of the primary air pipeline is connected to the interior of the rotary kiln pyrolysis chamber, and the primary air pipeline uses a primary fan to absorb the surrounding air of the pyrolysis incinerator and send it into the rotary kiln for pyrolysis chamber, to ensure the negative pressure state of the surrounding air of the pyrolysis incinerator while supplying the pyrolysis chamber of the rotary kiln for combustion;

The secondary air pipeline uses the secondary fan to suck the ambient air, and sends it into the secondary combustion chamber after being heated by the air preheater;

The grate air pipeline is connected to the grate combustion chamber, so as to send ambient air into the place where the organic solid waste is burned in the grate combustion chamber, and at the same time cool the grate combustion chamber of the grate.

Preferably, in the above air distribution system, the air outlet of the cooling air system is connected to the grate air main pipe in the grate air pipeline, and the air supply of the cooling air system passes through the secondary combustion chamber. After the surrounding and top walls are heated and sent to the grate air main pipe to supply the grate combustion chamber.

Preferably, in the above air distribution system, the secondary air pipeline is a pipeline surrounding the periphery of the secondary combustion chamber; the air preheater uses steam for preheating.

As can be seen from the above technical solutions, the pyrolysis incinerator provided by the present invention includes a rotary kiln pyrolysis chamber for thermal decomposition and preliminary incineration of organic solid waste, and a grate combustion chamber is provided in the downstream process of the rotary kiln pyrolysis chamber , to fully burn the organic solid waste after pyrolysis in the rotary kiln pyrolysis chamber, and set up a secondary combustion chamber to burn the gas generated by the grate combustion chamber during the combustion process. The pyrolysis incinerator provided by the present invention uses the rotary kiln pyrolysis chamber to have strong adaptability to material types, specifications and calorific value characteristics, and uses the rotary kiln pyrolysis chamber for preliminary treatment of various types of organic solid wastes. The solid waste is preliminarily incinerated and thermally decomposed in the pyrolysis chamber of the rotary kiln to reduce the size of the organic solid waste by pyrolysis. In response to the insufficient combustion of the organic solid waste in the pyrolysis chamber of the rotary kiln and the high thermal ignition loss rate of the ash after combustion A grate combustion chamber is installed in the downstream process of the pyrolysis chamber of the rotary kiln to burn the organic solid waste after pyrolysis. The waste is fully burned to reduce the thermal ignition loss rate of the ash after the organic solid waste is burned. At the same time, a secondary combustion chamber is arranged on the flow path of the gas generated after the combustion of the grate combustion chamber, so as to keep the grate combustion chamber in the combustion process. The resulting gas is combusted to decompose harmful substances and bring the flue gas to emission standards.

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 diagram of a pyrolysis incinerator and an air distribution system provided by an embodiment of the present invention;

Among them, 10 is the pyrolysis chamber of the rotary kiln, 110 is the kiln tail sealing cooling jacket, 20 is the grate combustion chamber, 210 is the combustion zone, 220 is the burning ember zone, 30 is the secondary combustion chamber, and 310 is the medium-temperature secondary combustion chamber, 320 is the high temperature secondary combustion chamber, 40 is the feeding system, 50 is the ash transport system, 610 is the primary air pipeline, 620 is the secondary air pipeline, 6210 is the air preheater, and 630 is the furnace exhaust air pipeline , 6310 is the grate air main pipe, 70 is the cooling air system, and 80 is the sealing air system.

Detailed ways

The core of the present invention is to disclose a pyrolysis incinerator, so as to make the combustion of the organic solid waste more sufficient and reduce the rate of thermal ignition loss after the combustion of the organic solid waste.

Another core of the present invention is to disclose an air distribution system for the above-mentioned pyrolysis incinerator, so as to further improve the combustion efficiency of the above-mentioned pyrolysis incinerator

As shown in FIG. 1 , the pyrolysis incinerator disclosed in the present invention includes a rotary kiln pyrolysis chamber 10, a grate combustion chamber 20 and a secondary combustion chamber 30, wherein the rotary kiln pyrolysis chamber 10 is used for thermal decomposition and preliminary incineration of organic For solid waste, the rotary kiln pyrolysis chamber 10 realizes uniform heating and movement of organic solid waste through rotation. It should be noted that the structural accuracy of the rotary kiln pyrolysis chamber 10 is smaller than that of the grate combustion chamber 20, so the rotary kiln pyrolysis chamber 10 It has stronger adaptability to material types, specifications and calorific value characteristics. Through the pyrolysis chamber 10 of the rotary kiln, various specifications of organic solid waste can be pyrolyzed into small-sized organic solid waste for subsequent full combustion; grate combustion The chamber 20 is arranged in the downstream process of the rotary kiln pyrolysis chamber 10 to fully burn the organic solid waste after being pyrolyzed in the rotary kiln pyrolysis chamber 10, and the air used for combustion in the grate combustion chamber 20 enters from the lower part and is combined with it. The organic solid waste is mixed and burned. Since the organic solid waste on the grate combustion chamber 20 is a smaller size organic solid waste after being pyrolyzed in the rotary kiln pyrolysis chamber 10, the air and the organic solid waste are mixed more fully. In order to make the combustion more sufficient, through the cooperation of the rotary kiln pyrolysis chamber 10 and the grate combustion chamber 20, to realize the combustion step of the organic solid waste first pyrolyzed and then fully burned, it is realized that the pyrolysis incinerator disclosed in the present invention is suitable for At the same time of various specifications of organic solid waste, the combustion is more sufficient, and the burning rate of ash after combustion is low. At the same time, since the gas generated by the combustion of the grate combustion chamber 20 may have insufficient detours, and at the same time, the gas contains harmful substances such as dioxins, so the gas generated after the combustion of the grate combustion chamber 20 flows on the flow path A secondary combustion chamber 30 is provided to fully burn the gas generated by the grate combustion chamber 20 during the combustion process, so as to decompose harmful substances and make the flue gas meet the emission standard.

The pyrolysis incinerator disclosed in the present invention utilizes the characteristics of the rotary kiln pyrolysis chamber 10 having strong adaptability to the types, specifications and calorific value characteristics of organic solid wastes, and uses the rotary kiln pyrolysis chamber 10 for various types of organic solid wastes. For preliminary treatment, the organic solid waste is initially incinerated and thermally decomposed in the pyrolysis chamber 10 of the rotary kiln to reduce the size of the organic solid waste by pyrolysis. Due to the problem of high ash reduction rate on ignition, a grate combustion chamber 20 is installed in the downstream process of the rotary kiln pyrolysis chamber 10 to burn the pyrolyzed organic solid waste, and the internal air distribution of the grate combustion chamber 20 is sufficient. . The characteristics of high combustion efficiency make the organic solid waste fully burned and reduce the thermal ignition loss rate of the ash after the organic solid waste is burned. At the same time, a secondary combustion chamber is arranged on the flow path of the gas generated after the combustion of the grate combustion chamber 20. 30, to burn the gas generated by the grate combustion chamber 20 during the combustion process to decompose harmful substances and make the flue gas meet the emission standard. In the pyrolysis incinerator disclosed in the present invention, aiming at the disadvantage of low combustion efficiency of the rotary kiln pyrolysis chamber 10, the rotary kiln pyrolysis chamber 10 is used for the decomposition of organic solid waste instead of focusing on improving the combustion of the rotary kiln pyrolysis chamber 10. At the same time, the grate combustion chamber 20 with high combustion efficiency is used to fully combust the organic solid waste after pyrolysis, so as to achieve the purpose of making the combustion of the organic solid waste more sufficient and reducing the ignition loss rate of the organic solid waste after combustion. .

Further, in the pyrolysis incinerator provided by the present invention, the 20 rows of combustion chambers of the grate combustion chamber use a horizontal forward mechanical grate to carry out the transmission and combustion of organic solid waste, and the use of the horizontal grate is compared with the inclined grate. , the organic solid waste can move forward in layers and evenly and loosely, and the air passing through the organic solid waste layer is more uniform, making the combustion more uniform and sufficient. At the same time, the structure of the horizontal grate is simpler than that of the inclined grate. Easy to assemble and service.

Further, since the organic solid waste on the grate entering the grate combustion chamber 20 has been pyrolyzed by the rotary kiln pyrolysis chamber 10, the grate combustion chamber 20 does not need to be provided with an area for drying organic solid waste. In the example, the horizontal push mechanical grate is divided into a combustion zone 210 and a ember zone 220. The organic solid waste pyrolyzed by the pyrolysis chamber 10 of the rotary kiln first enters the combustion zone 210 for rapid and sufficient combustion, and the ember zone 220 is provided with In the downstream of the combustion zone 210, to burn the organic solid waste residue after the combustion of the combustion zone 210 is completed, the grading combustion of the organic solid waste is realized, so that the combustion is more sufficient. It should be noted that the combustion zone 210 and the burning ember zone 220 pass through. The difference in air supply to achieve staged combustion.

It should be noted that the single-stage combustion design can also be used on the grate of the grate combustion chamber 20, and the air supply volume of all positions on the grate is supplied according to the air supply volume of the combustion zone 210 in the above technical solution. . Considering that in the above technical solution, the residue in the burning area 220 does not need a large amount of air, and the air supply volume is smaller than the air supply volume of the combustion area 210, so the implementation of staged combustion can ensure the sufficient combustion of organic solid waste. air to save the operating cost of the pyrolysis incinerator.

Further, the air supply ratio of the combustion zone 210 to the ember zone 220 is in the range of 3:(2-1.5), and the air supply ratio of the combustion zone 210 to the ember zone 220 is preferably 3:2.

In order to achieve full combustion of the gas generated in the grate combustion chamber 20 and prevent the gas from failing to meet the emission standard, in another specific embodiment of the present invention, the secondary combustion chamber 30 includes a medium-temperature secondary combustion chamber 310 and a high-temperature secondary combustion chamber 320. The temperature in the middle temperature secondary combustion chamber 310 and the high temperature secondary combustion chamber 320 is set in stages to realize multi-stage combustion of the gas generated in the grate combustion chamber 20, so that the gas combustion is more sufficient. At the same time, the high temperature secondary combustion chamber 320 is designed as The bent structure ensures that the residence time of the gas generated in the grate combustion chamber 20 in the high temperature secondary combustion chamber 320 is greater than 2s, so that the gas generated in the grate combustion chamber 20 is fully burned and decomposed.

It should be noted that, the secondary combustion chamber 30 is designed as a cavity composed of steel plates and refractory materials, so as to avoid overheating of the outer casing of the secondary combustion chamber 30 during laying and installation.

It should be further explained that the multi-stage combustion of the gas generated in the grate combustion chamber 20 can completely burn off the harmful gas in the gas and save energy at the same time.

Further, in a specific embodiment of the present invention, the temperature in the medium temperature secondary combustion chamber 310 is 650°C-900°C, and the temperature in the high temperature secondary combustion chamber 320 is 900°C-1150°C.

Further, in the pyrolysis incinerator provided by the present invention, the rotary kiln pyrolysis chamber 10 includes a cylinder for providing a place for pyrolysis of organic solid waste, and the cylinder is inclined and rotated during operation, so that the organic solid waste is In the process of pyrolysis, the rotation of the cylinder drives the organic solid waste to move in the inclined direction of the cylinder. The horizontal inclination of the cylinder is 1%-3%, and the rotation speed is 0.5r/min-3r/min during operation. .

On this basis, the temperature range of the cylinder during pyrolysis of organic solid waste is 550℃-650℃, and the incineration time of organic solid waste in the cylinder is 15min-30min, ensuring that the residence time of organic solid waste in the cylinder is 15min- 30min to ensure that the organic solid waste is pyrolyzed to a suitable specification. It should be noted that, according to the requirements of different pyrolysis specifications of the organic solid waste, the horizontal inclination of the cylinder can be increased or decreased, so that the organic solid waste can be The residence time in the cylinder is reduced or increased to obtain the organic solid waste of the required specification.

Further, the pyrolysis incinerator provided by the present invention also includes a feeding system 40 and an ash and slag transport system 50, wherein the feeding system 40 is used to supply organic solid waste, ash and slag to the pyrolysis chamber 10 of the rotary kiln The conveying system 50 is communicated with the outlet of the grate combustion chamber 20 to timely convey the ash and slag produced by the combustion of the grate combustion chamber 20 .

On the basis of the above-mentioned embodiment, the feeding system 40 includes a hopper, a chute and a pusher, wherein the hopper is used to hold organic solid waste, and the volume of the hopper needs to ensure that the pyrolysis incinerator is in the working condition of the maximum continuous evaporation of the boiler. The organic solid waste consumption in the next 2 hours, in a specific embodiment of the present invention, the processing capacity of the pyrolysis incinerator is 150t/d-250t/d, and the hopper can accommodate organic solid waste weighing 12t-21t.

The present invention also provides an air distribution system suitable for a pyrolysis incinerator. The air distribution system is applicable to the pyrolysis incinerator provided in any of the above embodiments. The air distribution system includes a combustion air system, a cooling air system 70 and Sealed air system 8, wherein, the combustion air system is used to distribute air to the area that needs to be burned in the pyrolysis incinerator, so as to realize the full combustion of organic solid waste and the gas generated by the decomposition of organic solid waste. Compared with the air distribution in the whole process, the utilization efficiency of combustion air is higher, which can save energy and reduce the cost of air distribution while realizing the full combustion of organic solid waste. Passing into the walls around and at the top of the secondary combustion chamber 30 to prolong the service life of the secondary combustion chamber 30; the air-tight air system 8 is connected to the kiln end sealing and cooling jacket 110 of the pyrolysis chamber 10 of the rotary kiln, to To ensure the tightness of the connection between the pyrolysis chamber 10 of the rotary kiln and the secondary combustion chamber 30, and prevent the gas from overflowing from the sealed cooling jacket 110 at the end of the kiln without being treated.

The air distribution system provided by the present invention uses the combustion air system to separately distribute air to the area that needs to be burned in the pyrolysis incinerator, so as to realize the full combustion of the organic solid waste and the gas generated by the decomposition of the organic solid waste. The purpose of saving energy and reducing the cost of air distribution is achieved while achieving full combustion of organic solid waste; at the same time, a cooling air system 70 is provided to cool the walls around and at the top of the secondary combustion chamber 30 to prolong the use of the secondary combustion chamber 30 The sealing air system 8 is connected to the kiln end sealing cooling jacket 110 of the rotary kiln pyrolysis chamber 10, so as to ensure the tightness of the connection between the rotary kiln pyrolysis chamber 10 and the second combustion chamber 30, and avoid the combustion process of organic solid waste. , the untreated gas in the pyrolysis chamber 10 of the rotary kiln and the grate combustion chamber 20 overflows from the sealed cooling jacket 110 at the end of the kiln, causing pollution. Through the combustion air system, the cooling air system 70 and the sealing air system 8, the complete combustion of the organic solid waste in the pyrolysis incinerator is achieved, the life of the secondary combustion chamber 30 is prolonged, and the sealing integrity of the system is ensured.

Further, in the air distribution system provided by the present invention, the combustion air system includes a primary air pipeline 610, a secondary air pipeline 620 and a furnace exhaust air pipeline 630, wherein one end of the primary air pipeline 610 is connected to the heat of the rotary kiln. Inside the pyrolysis chamber 10, the primary air pipeline 610 uses a primary fan to absorb the surrounding air of the pyrolysis incinerator and send it into the rotary kiln pyrolysis chamber 10, so as to supply the rotary kiln pyrolysis chamber 10 for combustion and at the same time ensure that the air around the pyrolysis incinerator is negatively charged. It should be noted that the pyrolysis chamber 10 of the rotary kiln performs pyrolysis, so the combustion air used does not need to be heated, and the surrounding air of the pyrolysis incinerator can be used. The negative pressure state of the air around the incinerator avoids the overflow of harmful gases. In a specific embodiment of the present invention, the pressure of the air around the pyrolysis incinerator is -100Pa～-20Pa; the secondary air pipeline 620 uses a secondary fan Absorb ambient air, and send it into the secondary combustion chamber 30 after being heated by the air preheater 6210. It should be noted that, in order to ensure the temperature in the secondary combustion chamber 30, it is avoided that the temperature of the secondary combustion chamber 30 is reduced due to the introduction of external air and weakens the For the combustion effect of harmful gases, an air preheater 6210 is set on the secondary air pipeline 620 to preheat the air inhaled by the secondary fan, and then sent to the secondary combustion chamber 30; the grate air pipeline 630 is connected to the grate for combustion chamber 20, to send ambient air into the place where the organic solid waste is burned in the grate combustion chamber 20, so as to achieve full combustion of the organic solid waste, and at the same time cool the grate in the grate combustion chamber 20 to avoid the overheating of the grate. life damage.

Further, since the combustion of the grate combustion chamber 20 needs to be carried out at a relatively high temperature, the supply air of the grate air pipeline 630 is preferably heated and then sent to the grate combustion chamber 20, because the cooling air system 70 is used to cool the two The surrounding and top walls of the combustion chamber 30 are only heated and not consumed by combustion. Therefore, in a specific embodiment of the present invention, the air outlet of the cooling air system 70 is connected to the grate in the grate air pipeline 630 The air main pipe 6310, the air supply from the cooling air system 70 is heated and sent to the grate air main pipe 6310 after passing through the periphery of the secondary combustion chamber 30 and the top wall, and is combined with the ambient air inhaled by the grate air pipe 630. After mixing, it is supplied to the grate combustion chamber 20 for combustion, which not only saves energy, but also realizes the recycling of air distribution.

Further, in another specific embodiment of the present invention, the secondary air pipeline 620 is a pipeline that surrounds the secondary combustion chamber 30 to supply air from all directions around the secondary combustion chamber 30 to ensure that the secondary combustion chamber 30 Full combustion of harmful gases inside.

Further, the air preheater 6210 in the secondary air pipeline 620 uses steam for preheating.

The terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish different objects, rather than to describe a specific order. Furthermore, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or elements is not provided with the listed steps or elements, but may include unlisted steps or elements.

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 (14)

1. a pyrolysis incinerator, is characterized in that, comprises: a rotary kiln pyrolysis chamber (10), the rotary kiln pyrolysis chamber (10) is used for thermal decomposition and preliminary incineration of organic solid waste; A grate combustion chamber (20), the grate combustion chamber (20) is arranged downstream of the rotary kiln pyrolysis chamber (10), so as to fully combust the pyrolysis chamber (10) of the rotary kiln pyrolysis chamber (10). organic solid waste; A secondary combustion chamber (30), the secondary combustion chamber (30) is used for burning the gas generated by the grate combustion chamber (20) during the combustion process. 2 . The pyrolysis incinerator according to claim 1 , wherein the grate combustion chamber ( 20 ) uses a horizontal push-mechanical grate to transport and burn organic solid waste. 3 . 3. The pyrolysis incinerator according to claim 2, characterized in that, the horizontal forward mechanical grate is divided into a combustion zone (210) and a ember zone (220), and the combustion zone (210) is used for The organic solid waste is rapidly combusted, the ember combustion zone (220) is used for burning the organic solid waste residue, and the combustion zone (210) and the ember combustion zone (220) achieve staged combustion through the difference in air supply volume. 4. The pyrolysis incinerator according to claim 3, characterized in that, the ratio of the air supply volume between the combustion zone (210) and the combustion zone (220) is in the range of 3:(2-1.5). 5. The pyrolysis incinerator according to claim 1, wherein the secondary combustion chamber (30) comprises a medium temperature secondary combustion chamber (310) and a high temperature secondary combustion chamber (320), and the grate combustion chamber ( The gas generated in 20) passes through the medium-temperature secondary combustion chamber (310) and the high-temperature secondary combustion chamber (320) in sequence, so as to realize multi-stage combustion of the gas. 6. The pyrolysis incinerator according to claim 5, wherein the temperature in the middle-temperature secondary combustion chamber (310) is 650°C-900°C, and the temperature in the high-temperature secondary combustion chamber (320) is 900℃-1150℃. 7. The pyrolysis incinerator according to claim 1, characterized in that, the rotary kiln pyrolysis chamber (10) comprises a cylinder body for providing a place for pyrolysis of organic solid waste, the cylinder body is inclined and arranged in the During rotation, the horizontal inclination of the cylinder is 1%-3%, and the rotating speed during operation is 0.5r/min-3r/min. 8. The pyrolysis incinerator according to claim 7, wherein the temperature of the cylinder body is 550°C-650°C when the organic solid waste is pyrolyzed, and the incineration time of the organic solid waste in the cylinder body is 15min-30min. 9. The pyrolysis incinerator according to claim 1, characterized in that it further comprises a feeding system (40) and an ash and slag conveying system (50), the feeding system (40) being used for turning the rotary The kiln pyrolysis chamber (10) supplies organic solid waste, and the ash and slag transport system (50) communicates with the outlet of the grate combustion chamber (20), and timely transports the waste generated by the combustion of the grate combustion chamber (20). Ash. 10. The pyrolysis incinerator according to claim 9, characterized in that the feeding system (40) comprises a hopper for containing organic solid waste, the hopper can accommodate organic solids with a weight of 12t-21t waste. 11. An air distribution system for a pyrolysis incinerator, wherein the pyrolysis incinerator is the pyrolysis incinerator according to any one of claims 1-10, and the air distribution system comprises: The combustion air system is used to separately distribute air to the area that needs to be burned in the pyrolysis incinerator, so as to realize the full combustion of the organic solid waste and the gas generated by the decomposition of the organic solid waste; a cooling air system (70), the cooling air inhales ambient air and passes into the periphery and the top wall of the secondary combustion chamber (30), so as to prolong the service life of the secondary combustion chamber (30); A sealed air system (80), the sealed air system (80) is communicated with the kiln end sealing cooling jacket (110) of the rotary kiln pyrolysis chamber (10), so as to ensure that the rotary kiln pyrolysis chamber (10) is connected to the rotary kiln pyrolysis chamber (10). The tightness of the connection of the secondary combustion chamber (30). 12. The air distribution system of claim 11, wherein the combustion air system comprises: A primary air pipeline (610), one end of the primary air pipeline (610) is connected to the interior of the rotary kiln pyrolysis chamber (10), and the primary air pipeline (610) uses a primary fan to absorb the pyrolysis and incineration The air around the furnace is fed into the pyrolysis chamber (10) of the rotary kiln, so as to supply the pyrolysis chamber (10) of the rotary kiln for combustion while ensuring the negative pressure state of the air around the pyrolysis incinerator; A secondary air pipeline (620) uses a secondary fan to absorb ambient air, and is heated by an air preheater (6210) and sent into the secondary combustion chamber (30); A grate air pipeline (630), the grate air pipeline (630) communicates with the grate combustion chamber (20), so as to send ambient air into the grate combustion chamber (20) to burn organic solid waste while cooling the grate in the grate combustion chamber (20). 13. The air distribution system according to claim 12, characterized in that, the air outlet of the cooling air system (70) is connected to the grate air main pipe in the grate air pipeline (630), and the cooling air After passing through the periphery of the secondary combustion chamber (30) and the top wall, the supply air of the air system (70) is heated and sent to the grate air main pipe to supply the grate combustion chamber (20) . 14. The air distribution system according to claim 12, wherein the secondary air pipeline (620) is a pipeline surrounding the periphery of the secondary combustion chamber (30); the air preheater (6210) uses steam for preheating.

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