CN205560763U - Mechanical stoker formula rubbish list stove gasification incineration boiler system - Google Patents

Abstract

The utility model discloses a mechanical grate type garbage single-furnace gasification incineration boiler system with less conversion heat efficiency loss and higher heat recovery efficiency, comprising a gasification incinerator, a boiler system, an air supply system, and a gasification incinerator It includes a feed bin and a furnace body. There is a material stacking sealing section between the feed bin and the furnace body. The upper end of the furnace body is arched and the first flue gas outlet is set. The boiler system includes a boiler body. The boiler body has a whirlwind that communicates with each other. Combustion chamber, furnace chamber a, furnace chamber b, a water wall is installed in the cyclone combustion chamber, a superheater is installed in the furnace chamber a, an evaporator is installed in the furnace chamber b, the flue gas inlet of the cyclone combustion chamber is connected to the first flue gas outlet, and the boiler body A steam drum is installed on the top of the steam drum, and a steam water inlet is provided on the steam drum. The steam drum is connected to the water wall and the water inlet of the evaporator for outputting water. The water wall and the steam outlet of the evaporator are connected to the steam drum inlet to return steam. The saturated steam outlet outputs superheated steam through the superheater.

Description

Mechanical grate type garbage single furnace gasification incineration boiler system

technical field

The utility model belongs to the technical field of solid waste incineration treatment, in particular to a mechanical grate type garbage single-furnace gasification incineration boiler system.

Background technique

The existing waste treatment technologies mainly include incineration, sanitary landfill, composting, and waste recycling. Among the conventional waste treatment technologies, incineration has the advantages of obvious reduction effect, complete harmlessness, small land occupation, utilization of waste heat energy, and less secondary pollution, which meets the strategic requirements of my country's sustainable development. However, with the continuous improvement of environmental protection requirements at home and abroad, how to strengthen the control of secondary pollution is particularly important. Therefore, waste pyrolysis and gasification incineration technology is gradually pushed to the road of industrial application, especially for domestic waste, various incineration technologies are mainly used now, and the extensive industrialization of gasification and incineration technology will bring the technology of domestic waste treatment industry Innovation.

Over the years, my country has made a lot of progress in the scientific research on gasification and incineration technology of biomass and garbage. There are many basic researches in the laboratory, and there are also applied researches, such as: rotary kiln type, vertical type and fluidized bed type retort gasification Or gasification high-temperature melting technology, etc. However, there are still certain limitations in the popularization and application of the technology. The main factors are the types of raw materials, the amount of garbage disposal, secondary pollution control and economic benefits.

Among the existing incineration processes and equipment, the grate type incinerator has various forms, and its application accounts for more than 80% of the total waste incineration market in the world. Among them, mechanical reverse push grate and forward push grate are used in the furnace body Or combined grate, there are also chain plate type and drum type grate.

To sum up, typical gasification incinerators each have their own advantages, but the problems and deficiencies that need to be solved in practical applications in our country:

1. For the characteristics of high water content and complex composition of domestic waste in my country, the technical use of mobile hearth needs to focus on the transportation capacity of waste.

2. With the continuous increase of the amount of garbage generated, the amount of garbage piled up like a mountain must be effectively increased in order to meet the market demand.

3. In the face of strict pollutant discharge requirements, secondary pollution control is the core issue that needs to be solved technically.

4. In order to effectively improve economic benefits, the heat recovery efficiency needs to be improved during the thermal treatment of waste. Existing waste heat treatment technologies usually use boilers to generate steam and push it to steam turbines for power generation. The entire conversion heat efficiency loss is relatively large, and the same amount of waste can be treated by relatively reducing heat loss and improving heat exchange efficiency to improve heat efficiency.

Existing gasification incinerators, such as the following two invention patents: Multi-column segmented drive compound domestic waste incinerator (ZL200710092508.9) and two-stage waste incinerator (ZL201010268376.2) Unsolved problems: heat treatment of waste The mode is relatively backward, just drying-burning-burning, the process of solid combustion releasing heat; the thermochemical reaction in the furnace is dominated by oxidation reaction, supplemented by reduction reaction, which is easy to produce secondary pollutants; when garbage is burned in the furnace, the peroxygen coefficient Large, large amount of primary air and secondary air supply, high dust content in flue gas, great impact on heat energy recovery system and flue gas treatment system, easy to accumulate dust, large amount of flue gas, reducing heat conversion efficiency; Without a separate gasifier and ember furnace, the garbage can only be processed in batches, and large-scale continuous gasification and incineration of garbage cannot be realized, and the amount of garbage processed is small.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art and provide a mechanical grate type garbage single-furnace gasification incineration boiler system, using the mechanical grate type garbage single-furnace gasification incineration boiler system to process garbage, and the garbage transportation capacity is stronger , The amount of waste treatment is larger, which can reduce heat loss and improve heat exchange efficiency. The heat recovery efficiency is high, and it can effectively reduce pollutant emissions.

The purpose of this utility model is achieved in that:

A mechanical grate type garbage single-furnace gasification incineration boiler system, including a gasification incinerator, a boiler system, and an air supply system,

The gasification incinerator includes a furnace frame, and a feed bin, a furnace body, and a slag outlet that are sequentially arranged on the furnace frame along the feeding direction, and the furnace body includes a furnace shell and a moving hearth, and the moving hearth A mechanical grate is adopted, and the furnace shell and the moving hearth form the hearth of the gasification incinerator. There are at least two independent primary air chambers. The primary air chambers below the moving hearth are divided into two groups, one group of primary air chambers corresponds to the drying section and gasification section of the moving hearth, and the other group of primary air chambers corresponds to For the embers section of the mobile hearth, a stacking sealing section is provided between the feed bin and the furnace body, and a pusher is provided on the furnace rack, and the pusher is located below the feed bin for The garbage in the feeding bin is pushed into the furnace, the furnace shell is arched, the first flue gas outlet is set on the vault of the furnace shell, and the secondary air supply ports are respectively set on the front and rear arches of the furnace shell, so The secondary air supply port is located directly above the drying section and gasification section of the moving hearth;

The boiler system includes a boiler body. The boiler body has a cyclone combustion chamber, a furnace chamber a, and a furnace chamber b. The cyclone combustion chamber is used for secondary combustion. The lower end of the combustion chamber is provided with a slag outlet, the lower part of the circumferential wall of the cyclone combustion chamber is provided with a flue gas inlet, and the flue gas inlet is connected to the first flue gas outlet of the furnace shell vault through a pipe, and the upper part of the circumferential wall of the cyclone combustion chamber is The second flue gas outlet is provided, and several combustion-supporting air supply ports are uniformly arranged on the circumferential wall of the cyclone combustion chamber. Each combustion-supporting air supply port is located between the flue gas inlet and the second flue gas outlet. The flue gas outlet is connected to the upper end of the furnace chamber a, the lower ends of the furnace chamber a and the furnace chamber b are connected, the upper end of the furnace chamber b is provided with a waste gas outlet, and the cyclone combustion chamber is provided with an annular water-cooled wall along the circumference, so A superheater is arranged in the furnace chamber a, an evaporator is arranged in the furnace chamber b, a steam drum is arranged on the top of the boiler body, the cyclone combustion chamber, furnace chamber a, and furnace chamber b are all located below the steam drum, and the steam drum There is a steam-water inlet on the top, and a steam-water separation device is installed in the steam drum to separate the steam-water mixture. The steam drum is connected to the water inlet of the water wall through the first downcomer, and is used to output the water separated by the steam-water separation device. The steam drum passes through the second The second downcomer is connected to the water inlet of the evaporator, and is used to output the water separated by the steam-water separation device. The water-cooled wall and the steam outlet of the evaporator are respectively connected to the steam inlet of the steam drum through the steam pipe, and are used to return high-temperature steam. The saturated steam outlet of the steam drum is connected to the steam inlet of the superheater through a pipeline, and is used for inputting the recirculated high-temperature steam into the superheater, and the steam outlet of the superheater outputs superheated steam;

The air supply system includes a blower, a first manifold, and a second manifold. The air inlet of the blower communicates with the atmosphere, and the air outlet of the blower is respectively connected to the main pipe of the first manifold and the second manifold. The branch pipes of the first manifold communicate with the primary air chambers below the drying section of the moving hearth, the gasification section, and the secondary air supply ports on the front and rear arches of the furnace shell respectively. The first regulating valve, the branch pipes of the second manifold are respectively connected with the primary air chambers below the burner section of the moving hearth and the combustion air supply ports of the cyclone combustion chamber, and the branch pipes of the second manifold are respectively provided with the first Two regulating valves.

Further, it also includes a steam output device and a feed water input system, the steam outlet of the superheater outputs superheated steam to the steam output device through a pipeline, and the feed water input system includes a condenser, a water pump, and a deaerator connected in series through pipelines 1. A booster water pump, the water pump and the deaerator are connected to the water source through a water supply pipeline, the water inlet of the condenser is connected to the drain of the steam output device through a pipeline, and the water outlet of the booster water pump is connected to the steam drum through a pipeline soda imports.

The condenser can convert all the unused steam of the steam output device into water and absorb the heat released by the steam. The main function of the deaerator is to use it to remove oxygen and other gases in the boiler feed water to ensure the quality of feed water and increase The pressurized water pump can increase the water pressure to ensure the water supply capacity of the water supply input system. The water supply input system can further recover waste heat from the water discharged from the steam output device and improve the heat recovery efficiency.

In order to use superheated steam to generate electricity, preferably, the steam output device is a steam turbine.

In order to further recover waste heat from the flue gas discharged from the furnace chamber b and improve the heat recovery efficiency, further, the boiler body has a furnace chamber c, the upper end of the furnace chamber c communicates with the waste gas outlet at the upper end of the furnace chamber b, A waste gas discharge port is arranged at the lower end of the furnace chamber c.

In order to further recover waste heat from the flue gas discharged from the furnace chamber b and improve the heat recovery efficiency, it is further preferred that a heat economizer is provided in the furnace chamber c, and the water inlet of the heat economizer is connected with the water booster pump. The water outlet is connected, and the water outlet of the economizer is connected with the steam-water inlet of the steam drum through a pipeline.

In order to further recover waste heat from the flue gas discharged from the furnace chamber b and improve heat recovery efficiency, it is further preferred that an air preheater is provided in the furnace chamber c, and the outlet end of the blower is connected to the air preheater The air inlet and the air outlet of the air preheater are connected to the main pipes of the first manifold and the second manifold.

In order to make full use of the remaining waste heat of the steam output device, preferably, a heat exchanger is also included, the heating channel of the heat exchanger is connected between the drain port of the steam output device and the input end of the deaerator through a pipeline, and the heat exchanger The heated channel of the heater is connected to the main pipe of the first manifold.

In order to perform harmless treatment of the flue gas discharged from the furnace chamber c, further, the waste gas discharge port of the furnace chamber c is connected to a flue gas purification system, and the flue gas purification system includes gas scrubbers connected in series along the exhaust direction , dust collector, induced draft fan, chimney.

In order to discharge the waste slag produced by the flue gas deposition in the furnace chamber a, furnace chamber b, and cyclone combustion chamber, and prevent the waste residue from escaping and causing pollution, preferably, a common slag outlet is provided under the furnace chamber a and furnace chamber b. The slag outlet at the lower end of the cyclone combustion chamber is in the shape of a cone with a decreasing radius from top to bottom, and the common slag outlet and the slag outlet of the cyclone combustion chamber are respectively connected with the hearth of the gasifier.

In order to make the high-temperature flue gas generated after combustion easy to discharge, and to facilitate the installation of the pipeline, preferably, the flue gas inlet and the second flue gas outlet are located on the opposite side of the circumferential wall of the cyclone combustion chamber; the second flue gas outlet is along the The circumferential wall of the cyclone combustion chamber is arranged radially or tangentially.

In order to adapt to the installation space in the factory, preferably, the front arch of the furnace shell is a straight structure, or the front arch of the furnace shell is a rear end inclined upward structure.

Due to the above-mentioned technical scheme, the utility model has the following beneficial effects:

The utility model adopts the cyclone combustion chamber to perform secondary combustion on the synthesizer produced by the incinerator, and under the action of combustion-supporting air supply, the combustion is more sufficient, the heat recovery efficiency is high, and the emission of pollutants can be reduced. The air supply to the drying section of the moving hearth and the gasification section can individually increase the air temperature of the air supply to the drying section of the moving hearth, so that the drying effect of the drying section of the moving hearth is better, which is beneficial to the subsequent gasification, secondary Burn step. The utility model has a novel concept, a large amount of garbage treatment, adapts to the characteristics of high water content and complex components of domestic garbage in my country, improves the energy conversion efficiency in the garbage treatment process and reduces the pollutant discharge in the flue gas, and effectively prevents secondary pollution. And it can realize large-scale continuous gasification and incineration treatment of garbage, ensure the effect of gasification and incineration of garbage and the thermal ignition loss rate of ash, relatively reduce heat loss and improve heat exchange efficiency, and improve thermal efficiency.

In this boiler system, the annular water-cooled wall is installed on the cyclone combustion chamber. The synthesis gas is burned more fully in the cyclone combustion chamber, and the temperature generated by the combustion is higher, which relatively reduces heat loss and improves heat exchange efficiency. The heat recovered by this boiler system comes from the high-temperature syngas flue gas at the outlet of the garbage gasifier. The syngas flue gas enters the cyclone combustion chamber, and at the same time, air is tangentially supplied into the cyclone combustion chamber to support the combustion of combustible syngas, and the flue gas passes through the cyclone in turn. Combustion chamber, furnace chamber a, furnace chamber b, economizer and air preheater. Then use the economizer to preheat the condensed water, the preheated condensed water enters the boiler part, the condensed water is heated in the water wall and the evaporator, forms saturated steam and enters the steam drum, after the separation of steam and water, the saturated steam enters the superheater, and is heated again to form superheated steam output, which can be used for power generation, heating, heating, etc. The utility model uses the cyclone combustion method to reduce the content of fly ash in the flue gas; the combustion temperature of the synthesis gas is high, the residence time of the flue gas is long, the pollutants are effectively decomposed, the discharge of pollutants is reduced, and the synthesis gas after continuous gasification of garbage is realized Incineration treatment and heat recovery.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of gasification incinerator;

The structural representation of cyclone combustion chamber in Fig. 3;

FIG. 4 is a schematic top view of FIG. 3;

Fig. 5 is a structural schematic diagram of the steam output device and the water supply input system;

Fig. 6 is a schematic structural diagram of the flue gas purification system.

reference sign

1 is the gasification incinerator, 101 is the furnace frame, 102 is the feeding bin, 103 is the furnace shell, 104 is the furnace, 105 is the hearth, 106 is the pusher, 107 is the primary air chamber, and 108 is the stacking sealing section , 112 is the first flue gas outlet, 114 is the ignition and combustion-supporting hole, 115 is the secondary air supply port, and 116 is the slag discharge port;

2 is an air supply system, 203 is a blower, 204 is a first manifold, 205 is a second manifold, 207 is a first regulating valve, and 208 is a second regulating valve;

3 is the cyclone combustion chamber, 301 is the ignition and combustion-supporting hole of the combustion chamber, 302 is the slag outlet, 303 is the flue gas inlet, 304 is the second flue gas outlet, and 305 is the combustion-supporting air supply port.

4 is the boiler body, 402 is the furnace chamber a, 403 is the furnace chamber b, 404 is the furnace chamber c, 405 is the water wall, 406 is the superheater, 407 is the evaporator, 408 is the steam drum, 409 is the first downcomer, 410 is the second downcomer, 411 is the steam output device, 412 is the water supply input system, 413 is the condenser, 414 is the water pump, 415 is the deaerator, 416 is the booster pump, 417 is the water supply pipeline, 418 is the economizer , 419 is a flue gas purification system, 420 is a scrubber, 421 is a dust collector, 422 is an induced draft fan, 423 is a chimney, 424 is an air preheater, and 425 is a heat exchanger.

detailed description

Referring to Fig. 1, it is a preferred embodiment of a mechanical grate type garbage single furnace gasification incineration boiler system, including a gasification incinerator 1, a cyclone combustion chamber 3, and an air supply system 2,

Referring to Fig. 2, the gasification incinerator 1 includes a furnace rack 101, and a feed bin 102, a furnace body, and a slag outlet 116 arranged in sequence along the feeding direction on the furnace rack 101, and the furnace body includes a furnace shell 103 , mobile hearth 105, described mobile hearth 105 adopts the mechanical grate type mobile hearth 105 driven independently in sections, the fire grate of mechanical grate type mobile hearth 105 is made of movable fire grate plate and fixed fire grate plate It is formed by overlapping and arranged alternately. The adjacent groups of movable grate plates are connected by tie rods and driven by a set of driving devices. The mechanical grate type moving hearth 105 is used as a carrier for transporting garbage, and its implementation can be various types of moving hearth 105, such as chain plate type, drum type, multi-stage type grate system, etc. The furnace shell 103 and the moving hearth 105 enclose the hearth 104 of the gasification incinerator 1, and the moving hearth 105 is successively arranged as a drying section, a gasification section, and a burning section along the feeding direction, and the moving hearth 105 There are at least two independently arranged primary air chambers 107 below, and the primary air chambers 107 below the moving hearth 105 are divided into two groups, one group of primary air chambers 107 corresponding to the drying section and gasification section of the moving hearth 105, Another group of primary air chambers corresponds to the burner section of the movable hearth 105, and a stacking seal section 108 is provided between the feed bin 102 and the furnace body, and a pusher 106 is provided on the furnace frame 101. Pusher 106 is positioned at the below of feeding bin 102, is used for pushing the rubbish in feeding bin 102 in the furnace 104, is provided with stacking sealing section 108 between described feeding bin 102, the body of furnace, and pusher 106 works into place in the stacking sealing section 108, and the garbage raw materials are put into and fall from the feeding bin 102, and the pusher 106 retreats, and then pushes forward, and reciprocatingly pushes the material several times to form a stacking in the stacking sealing section 108, so that the furnace body The entrance is in a state of stacking and sealing, which enhances the sealing effect of the furnace body and solves the problem of easy air leakage from the pusher 106 and the feeding bin 102. When it is necessary to completely clean the furnace and dispose of all the rubbish, the pusher 106 will advance half a stroke further to push the rubbish into the body of the furnace completely, so that the inlet of the body of furnace will lose the sealing effect of stacking materials. The furnace shell 103 is arched, and the front arch of the furnace shell 103 is a straight structure, or the front arch of the furnace shell 103 is a rear end inclined upward structure. The vault of the furnace shell 103 is provided with a first flue gas outlet 112, and the front and rear arches of the furnace shell 103 are respectively provided with secondary air supply ports 115, and each secondary air supply port 115 is located in the drying section and gasification section of the moving hearth 105 directly above the .

The boiler body 4 has a cyclone combustion chamber 3, a furnace chamber a402, a furnace chamber b403, and a furnace chamber c404. Referring to FIGS. The flue gas inlet 303 communicates with the first flue gas outlet 112 of the gasifier 103 through a pipe, and the upper end of the cyclone combustion chamber 3 is the second flue gas outlet 304, and the flue gas inlet 303 and the second flue gas outlet 304 are located in the cyclone combustion chamber 3 On the opposite side of the circumferential wall, the top of the cyclone combustion chamber 3 is provided with an ignition and combustion-supporting hole 301 for the combustion chamber. In order to fully mix the flue gas and combustion-supporting air in the cyclone combustion chamber 3 and discharge them from the second flue gas outlet 304 after combustion, the cyclone combustion chamber 3 is provided with several combustion-supporting air supply ports 305, and the plurality of combustion-supporting air supply ports 305 is located between the flue gas inlet 303 and the second flue gas outlet 304 . The flue gas inlet 303 , the second flue gas outlet 304 , and the combustion air supply port 305 are arranged radially or tangentially along the circumferential wall of the cyclone combustion chamber 3 . The second flue gas outlet 304 at the upper end of the cyclone combustion chamber 3 communicates with the upper end of the furnace chamber a402, and the lower ends of the furnace chamber a402 and the furnace chamber b403 communicate with each other. The lower end of the gasifier is provided with a tapered slag outlet 302 whose radius becomes smaller from top to bottom, and the tapered slag outlet 302 communicates with the hearth of the gasifier 103 . A common slag outlet is provided below the furnace chamber a402 and the furnace chamber b403 , and the common slag outlet is communicated with the hearth of the gasifier 103 . In this embodiment, both the common slag outlet and the conical slag outlet 302 communicate with the tail transition section of the furnace of the gasifier 103 .

The cyclone combustion chamber 3 is provided with an annular water-cooled wall 405 along the circumference of the inner wall, a superheater 406 is provided in the furnace chamber a402, an evaporator 407 is provided in the furnace chamber b403, and a steam drum 408 is provided at the top of the boiler body 4. The cyclone combustion chamber 3, the furnace chamber a402, and the furnace chamber b403 are all located below the steam drum 408. The steam drum 408 is provided with a steam-water inlet for inputting the steam-water mixture. The steam drum 408 is provided with a steam-water separation device for Separate the steam-water mixture, the steam drum 408 is connected to the water inlet of the water wall 405 through the first downcomer 409, and is used to output the water separated by the steam-water separation device, and the steam drum 408 is connected to the water inlet of the evaporator 407 through the second downcomer 410. In order to output the water separated by the steam-water separation device, the steam outlets of the water-cooled wall 405 and the evaporator 407 are respectively connected to the steam inlet of the steam drum 408 through steam pipes for returning high-temperature steam, and the saturated steam of the steam drum 408 The outlet is connected to the steam inlet of the superheater 406 through a pipeline, and is used to input the recirculated high-temperature steam into the superheater 406, and the steam outlet of the superheater 406 outputs superheated steam.

Referring to Fig. 1, the air supply system 2 includes a blower 203, a first manifold 204, and a second manifold 205, the air inlet of the blower 203 communicates with the atmosphere, and the air outlet of the blower 203 is respectively connected to the first manifold. Pipe 204, the main pipe of the second manifold 205, and the main pipe of the first manifold 204 is provided with an air preheater 209. The air preheater 209 adopts an electric heater, of course, the air preheater 209 can also directly adopt the air preheater 209 arranged in the boiler. The branch pipes of the first manifold 204 communicate with the primary air chambers 107 below the drying section and the gasification section of the moving hearth 105 and the secondary air supply ports 115 on the front and rear arches of the furnace shell 103 respectively. Each branch pipe of 204 is provided with a first regulating valve 207 respectively, and the branch pipes of the second manifold 205 are respectively connected with each primary air chamber 107 below the burning section of the moving hearth 105 and each combustion air supply port 305 of the cyclone combustion chamber 3 Each branch of the second manifold 205 is respectively provided with a second regulating valve 208 .

Referring to Fig. 5, in this embodiment, the boiler system further includes a steam output device 411 and a feed water input system 412. In this embodiment, the steam output device 411 is a steam turbine. The steam outlet of the superheater outputs superheated steam to the steam output device 411 through a pipeline, and the feed water input system 412 includes a condenser 413, a water pump 414, a deaerator 415, and a booster water pump 416 connected in series through pipelines. The water pump 414 and the deaerator 415 are connected to a water source through a water supply pipeline 417, the water inlet of the condenser 413 is connected to the drain of the steam output device 411 through a pipeline, and the water outlet of the booster water pump 416 is connected to the steam drum 408 through a pipeline soda imports. The upper end of the furnace chamber c404 communicates with the waste gas outlet at the upper end of the furnace chamber b403, and the lower end of the furnace chamber c404 is provided with a waste gas discharge port. The furnace chamber c404 is provided with a heat saver 418, and the water inlet of the heat saver 418 is connected to the The water outlet of the booster water pump 416 is connected, and the water outlet of the economizer 418 is connected with the steam water inlet of the steam drum 408 . Referring to FIG. 6 , the exhaust gas outlet of the furnace chamber c404 is connected to a flue gas purification system 419 , which includes a scrubber 420 , a dust collector 421 , an induced draft fan 422 , and a chimney 423 connected in series along the exhaust direction. The furnace chamber c404 is provided with an air preheater 424. In this embodiment, the air preheater 424 is located at the downstream end of the economizer 418, and the air outlet of the blower 203 is connected to the air inlet of the air preheater 424. , the air outlet of the air preheater 424 is connected to the main pipe of the first manifold and the second manifold 206 . It also includes a heat exchanger 425, the heating channel of the heat exchanger is connected between the outlet of the steam output device and the input end of the deaerator through a pipeline, and the heated channel of the heat exchanger is connected to the first manifold. On the steward.

A garbage treatment method for a mechanical grate type garbage single furnace gasification incineration boiler system, the method is carried out according to the following steps:

Step A, close the gate of the gasification incinerator 1 and the atmospheric ventilation, start the gasification incinerator 1, put the garbage raw materials into the feed bin 102, push the feeder 106 back and forth multiple times, and remove the garbage falling from the feed bin 102 Raw materials are pushed into the stockpiling sealing section 108 between the feed bin 102 and the gasification incinerator 1, so that the stockpiling sealing section 108 forms a stockpiling sealed state, and redundant garbage falls into the movable hearth 105 of the gasification incinerator 1, The moving hearth 105 of the gasification incinerator 1 works until the garbage is piled up on the moving hearth 105 of the gasification incinerator 1 to the required thickness: 0.6-0.8m, and stops feeding to the feed bin 102, and the gasification incinerator 1 The moving hearth 105 of the gasification burner stops working, and then, the ignition burner is used to extend into the furnace 104 through the ignition and combustion-supporting hole 114 of the gas incinerator, and under the action of the ignition burner, the gasification incinerator 1 is started, baked, and baked. During the furnace, the accumulated rubbish can protect the movable hearth 105 and prevent the hearth 105 from being burned. After this process is completed stably, the furnace 104 of the gasification incinerator 1 reaches the predetermined temperature of 600-700°C; the purpose of the oven is to remove the natural water and crystallization water in the lining, so as not to cause the furnace temperature to rise too fast when starting work. , A large amount of water expansion causes the furnace body to swell, bubble or deform, and even the furnace wall collapses, which affects the strength and service life of the heating furnace wall.

Step B, start and adjust the air supply system 2, adjust the process parameters of the gasification incinerator 1 and the air supply system 2 (the speed of the pusher 106, the speed of the grate, the primary air temperature, air pressure and air volume, the secondary air temperature, wind pressure and air volume, furnace temperature, negative pressure in the furnace, material layer thickness, etc.), feed material to the feed bin 102, and the movable hearth 105 in the furnace works to transport garbage, and the garbage begins to burn in the furnace 104, so that the furnace 104 The temperature in the combustion state is stable above 850°C.

Step C, adjust the process parameters of the gasification incinerator 1, the cyclone combustion chamber 3 and the air supply system 2, so that the heat treatment method of the garbage on the hearth 105 transitions from the process of drying→burning→burning to drying→pyrolysis and gasification →In the process of burning, the bottom slag is transported into the slag outlet, and the first flue gas outlet 112 stably produces 10%-20% synthesis gas, so that the temperature of the second flue gas outlet 304 of the cyclone combustion chamber 3 is stabilized above 850°C, realizing Waste continuous gasification incineration treatment.

Step D. When maintenance or shutdown is required, stop feeding, adjust the process parameters of gasification incinerator 1, cyclone combustion chamber 3, and air supply system 2, so that gasification incinerator 1 gradually returns to the combustion state, and wait for the garbage and garbage residue After burning, the mechanical grate type garbage single furnace gasification incinerator 1 and the air supply system 2 are closed.

Finally, it is noted that the above preferred embodiments are only used to illustrate the technical solutions of the present utility model without limitation. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that it can be described in the form Various changes can be made in the above and in the details without departing from the scope defined by the claims of the present invention.

Claims (10)

1. a stoker fired grate formula rubbish list stove gasification burning boiler system, it is characterised in that: include incinerator, steam generator system, air feed system,

nullDescribed incinerator includes grate，And the feed hopper set gradually along feedstock direction on grate、Body of heater、Fall cinder notch，Described body of heater includes furnace shell、Moving hearth，Described moving hearth uses stoker fired grate，Described furnace shell、Moving hearth surrounds the burner hearth of incinerator，Described moving hearth is set to dryer section successively along feedstock direction、Gasification section、Burning segment，The lower section of moving hearth is provided with the air compartment that at least two is independently arranged，Air compartment of the lower section of moving hearth is divided into two groups，The dryer section of air compartment correspondence moving hearth of one of which、Gasification section，The burning segment of another air compartment correspondence moving hearth of group，Described feed hopper、Windrow seal section it is provided with between body of heater，Described grate is provided with pusher，Described pusher is positioned at the lower section of feed hopper，For the rubbish in feed hopper is pushed in burner hearth，Described furnace shell is in the shape that arches upward，The vault of furnace shell arranges the first exhanst gas outlet，The face arch of furnace shell、Secondary it is respectively provided with for air port on rear arch，Described secondary is positioned at moving hearth dryer section for air port、The surface of gasification section；

nullDescribed steam generator system includes boiler body，Described boiler body has cyclone combustion chamber、Furnace chamber a、Furnace chamber b，Described cyclone combustion chamber is used for second-time burning，The upper end of cyclone combustion chamber is provided with combustion chamber ignition combustion-supporting hole，The lower end of cyclone combustion chamber arranges slag notch，The bottom of described cyclone combustion chamber circumferential wall arranges smoke inlet，This smoke inlet connects the first exhanst gas outlet of furnace shell vault by pipeline，The top of described cyclone combustion chamber circumferential wall arranges the second exhanst gas outlet，Some combustion airs it are uniformly provided with for air port in the circumferential wall of described cyclone combustion chamber，Each combustion air is respectively positioned on smoke inlet for air port、Between second exhanst gas outlet，Second exhanst gas outlet of cyclone combustion chamber connects with the upper end of furnace chamber a，Described furnace chamber a、The lower end connection of furnace chamber b，The upper end of described furnace chamber b arranges waste gas outlet，Described cyclone firing is indoor circumferentially arranged with water-cooling wall ringwise，It is provided with superheater in described furnace chamber a，It is provided with evaporimeter in furnace chamber b，The top of boiler body arranges drum，Described cyclone combustion chamber、Furnace chamber a、Furnace chamber b is respectively positioned on below drum，Described drum is provided with carbonated drink import，Water separator it is provided with in drum，For separating steam water interface，Drum connects the water inlet of water-cooling wall by the first down-comer，For exporting the isolated water of water separator，Drum connects the water inlet of evaporimeter by the second down-comer，For exporting the isolated water of water separator，Described water-cooling wall、The venthole of evaporimeter connects the air intake of drum respectively by steam pipe，For the high-temperature steam that refluxes，The saturated vapor outlet of described drum connects the air intake of superheater by pipeline，For by the high-temperature steam input superheater of backflow，The venthole output superheated steam of described superheater；

Described air feed system includes air blast, first manifold, second manifold, the air inlet of described air blast and atmosphere, the gas outlet of described air blast connects the first manifold respectively, the house steward of the second manifold, the arm of described first manifold respectively with moving hearth dryer section, each air compartment below gasification section and furnace shell face arch, secondary on rear arch connects for air port, the first regulation valve it is respectively provided with on each arm of the first manifold, the arm of described second manifold connects for air port with each combustion air of each air compartment below moving hearth burning segment and cyclone combustion chamber respectively, the second regulation valve it is respectively provided with on each arm of the second manifold.

Stoker fired grate formula rubbish list stove gasification burning boiler system the most according to claim 1, it is characterized in that: also include steam output device, to water input system, the venthole of described superheater exports superheated steam by pipeline to steam output device, the described condenser including to water input system being sequentially connected in series by pipeline, water pump, oxygen-eliminating device, booster water pump, described water pump, water source is connected by moisturizing pipeline between oxygen-eliminating device, the water inlet of described condenser connects the discharge outlet of steam output device by pipeline, the delivery port of described booster water pump connects the carbonated drink import of drum by pipeline.

Stoker fired grate formula rubbish list stove gasification burning boiler system the most according to claim 2, it is characterised in that: described boiler body has furnace chamber c, and the upper end of described furnace chamber c connects with the waste gas outlet of furnace chamber b upper end, and the lower end of furnace chamber c arranges Waste gas outlet.

Stoker fired grate formula rubbish list stove gasification burning boiler system the most according to claim 3, it is characterized in that: in described furnace chamber c, be provided with economizer, the water inlet of described economizer connects with the delivery port of booster water pump, and the delivery port of described economizer is by the carbonated drink inlet communication of pipeline with drum.

Stoker fired grate formula rubbish list stove gasification burning boiler system the most according to claim 3, it is characterized in that: in described furnace chamber c, be provided with air preheater, the outlet side of described air blast connects the air inlet of air preheater, and the gas outlet of air preheater connects the first manifold, the house steward of the second manifold.

Stoker fired grate formula rubbish list stove gasification burning boiler system the most according to claim 2, it is characterized in that: also include a heat exchanger, the passage of heat that adds of described heat exchanger is connected between the discharge outlet of steam output device, oxygen-eliminating device input by pipeline, and the heated passage of described heat exchanger is connected on the house steward of the first manifold.

Stoker fired grate formula rubbish list stove gasification burning boiler system the most according to claim 3, it is characterized in that: the Waste gas outlet of described furnace chamber c connects flue gas purification system, aeration tower that described flue gas purification system includes being sequentially connected in series along discharge directions, deduster, air-introduced machine, chimney.

Stoker fired grate formula rubbish list stove gasification burning boiler system the most according to claim 1, it is characterized in that: below described furnace chamber a, furnace chamber b, be provided with common slag notch, the taper that the slag notch of described cyclone combustion chamber lower end diminishes in radius from top to bottom, this common slag notch, cyclone combustion chamber slag notch connect with the burner hearth of gasification furnace respectively.

Stoker fired grate formula rubbish list stove gasification burning boiler system the most according to claim 1, it is characterised in that: described smoke inlet, the second exhanst gas outlet are positioned at the opposition side of cyclone combustion chamber circumferential wall；Described second exhanst gas outlet is radially or tangentially arranged along cyclone combustion chamber circumferential wall.

Stoker fired grate formula rubbish list stove gasification burning boiler system the most according to claim 1, it is characterised in that: the face arch of described furnace shell is flat construction, or, the face arch of described furnace shell is that rear end is inclined upwardly structure.