CN112050221A

CN112050221A - A waste incineration system with pyrolysis gasification

Info

Publication number: CN112050221A
Application number: CN202010984378.5A
Authority: CN
Inventors: 秦海燕; 陈纪赛; 孙春霞
Original assignee: Cssc Nanjtng Luzhou Environment Protection Equipment Engineering Co ltd
Current assignee: Cssc Nanjtng Luzhou Environment Protection Equipment Engineering Co ltd
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2020-12-08

Abstract

The invention relates to a waste incineration system with pyrolysis gasification, comprising an automatic feeding device, a pyrolysis gasifier, a secondary combustion chamber, a quenching deacidification device, a bag filter, a flue gas fan and a chimney, which are connected in sequence. An activated carbon adsorption spray gun is arranged between the quenching deacidification device and the bag filter, and the temperature in the pyrolysis gasifier is 500°C to 600°C. The present invention has the advantages of being able to carry out on-site garbage incineration treatment, high efficiency, low auxiliary fuel consumption, less harmful gas generated in the incineration process, reducing environmental pollution in the process of garbage disposal, and at the same time, it can also solve the problem of far away The problem of stacking combustible garbage in special areas such as islands and offshore platforms without municipal services in cities and towns.

Description

Waste incineration system with pyrolysis gasification

Technical Field

The invention relates to a waste incineration system with pyrolysis gasification, belonging to the technical field of environmental protection and incineration in areas away from cities and towns and without municipal service, such as islands, offshore platforms and the like.

Background

With the increase of the number of people in islands and the development of offshore platform construction, how to properly dispose the generated garbage becomes a problem which is urgently needed to be solved at present. At present, the remote areas in China still adopt the original garbage disposal modes of stacking, simple landfill, open-air incineration and the like. The sea island has serious influence on environmental systems such as water body, atmosphere and the like from simple stacking of original garbage to current landfill treatment, further influences the physical and mental health of people around, and even seriously harms the public safety of the masses. Although the incineration device is arranged on the offshore platform, the incineration device is generally arranged in a simplified manner according to the requirement of arranging the garbage incineration device on the ship, and the procedure of purifying and treating the exhaust gas and the flue gas after incineration is lacked. Generally, incinerators used in ships should not be incinerated at ports or offshore transfer terminals. Therefore, when the island and the offshore platform are constructed, certain defects exist in the garbage landfill or marine incinerator treatment, and the use is limited.

In conclusion, at present, the combustible garbage in special areas such as islands, offshore platforms and the like which are far away from cities and towns and have no municipal service are partially buried on site or simply incinerated directly, the emission index of the incineration flue gas is according to the requirement of the resolution of the IMO MEPC.244(66), only the blackness and carbon monoxide of the discharged flue gas are detected, and the pollutants in the flue gas such as particulate matters, nitrogen oxides, hydrogen chloride, dioxin and the like in the discharged flue gas are not required; and the other part is collected, compressed and packed and then sent to a centralized garbage disposal center for centralized processing.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a waste incineration system with pyrolysis gasification, which can improve the incineration efficiency, reduce the consumption of auxiliary fuel and reduce harmful gas generated in the incineration process.

In order to solve the technical problems, the invention provides a waste incineration system with pyrolysis gasification, which comprises an automatic feeding device, a pyrolysis gasification furnace, a secondary combustion chamber, a quenching deacidification device, a bag-type dust remover, a flue gas fan and a chimney which are sequentially connected, wherein an activated carbon adsorption spray gun is arranged between the quenching deacidification device and the bag-type dust remover, and the temperature in the pyrolysis gasification furnace is 500-600 ℃.

The invention provides the garbage pyrolysis incineration on the basis of the traditional garbage incineration system, namely, the garbage pyrolysis incineration is maintained by utilizing the self heat value of combustible garbage after ignition in a pyrolysis gasification furnace, and an ignition device can be closed after the ignition in the pyrolysis gasification furnace is successful.

Further, pyrolysis gasifier includes the furnace body that constitutes by the brickwork, supreme ashes layer, pyrolysis gasification layer, burnout layer, burning layer, pyrolysis dry distillation gasification layer, the dry layer of having set gradually down in the furnace body, pyrolysis gasification layer is equipped with the grate that can overturn, the burning layer is connected with the burner who locates outside the furnace body, and burner locates burning layer department for help burning in situ rubbish burning, the dry layer is connected with the top of second combustion chamber through the first flue gas pipeline of locating the furnace body top.

Further, the furnace body is connected with a primary air blower through an air inlet pipe, an air supply proportion adjusting electric valve is arranged on the air inlet pipe, a plurality of air supply pipes for pyrolysis are arranged above the grate on the furnace body, the air inlets of the air supply pipes for pyrolysis are connected with the air inlet pipe, the primary air blower supplies air for the air supply pipes for pyrolysis, and the air outlets of the air supply pipes for pyrolysis extend downwards to the lower portion of the grate (the air supply pipes for pyrolysis extend downwards to the lower portion of the grate in the furnace body). A primary air blower and an air supply proportion adjusting electric valve are additionally arranged at the pyrolysis gasifier, and the temperature in the pyrolysis gasifier is ensured to be controlled between 500 ℃ and 600 ℃ all the time by adjusting the air supply amount in the pyrolysis gasifier.

Furthermore, a feed inlet capable of being automatically opened and closed is arranged at the upper end of the furnace body, an ash outlet capable of being automatically opened and closed is arranged at the lower end of the furnace body, and the ash outlet is communicated with the fire grate.

Furthermore, the automatic feeding device comprises a garbage can, a transmission chain mechanism, a hook and a support, wherein the transmission chain mechanism is arranged on one side of the pyrolysis gasification furnace, the support is arranged on the transmission chain mechanism through the hook and can move up and down along the transmission chain mechanism under the driving of the transmission chain mechanism, and the garbage can is arranged on the support.

Furthermore, the secondary combustion chamber is of a horizontal box structure, a plurality of baffle plates are arranged in the horizontal box structure, a flue gas inlet is formed in the left side of the upper end of the secondary combustion chamber, a flue gas outlet is formed in the right side of the secondary combustion chamber, and the flue gas outlet is connected with a quenching deacidification device through a second flue gas pipeline. The second combustion chamber adopts a box body baffling structure with an upper inlet and a side outlet, so that the flue gas can be conveniently and fully combusted in the second combustion chamber.

Furthermore, a secondary combustion device is arranged on the left side of the secondary combustion chamber, a secondary air blower is arranged at the top of the secondary combustion chamber and connected with the inside of the secondary combustion chamber through an air inlet pipe, and an ash outlet door is arranged at the lower part of the secondary combustion chamber.

Thus, the secondary combustion device is used for ignition combustion, the flue gas is burnt out in the secondary combustion chamber, the temperature of the secondary combustion chamber is controlled between 850 ℃ and 950 ℃, and the residence time of the flue gas in the secondary combustion chamber is more than 2 s.

Furthermore, the rapid cooling deacidification device comprises a rapid cooling deacidification tower and a rapid cooling water tank, a flue gas outlet with a temperature thermal resistor is arranged at the top end of the rapid cooling deacidification tower, the flue gas outlet is connected with a bag-type dust collector through a third flue gas pipeline, and an activated carbon adsorption spray gun is arranged on the third flue gas pipeline.

In the structure, high-temperature flue gas from the secondary combustion chamber is rapidly cooled to below 200 ℃ through a quenching deacidification device in a high-pressure atomization mode, wherein the quenching temperature is higher than 850 ℃.

Furthermore, the activated carbon adsorption spray gun comprises a nozzle and a spray gun body, wherein the spray gun body is made of S316L, and the nozzle is made of Hastelloy.

Furthermore, a flue gas outlet of the bag-type dust collector is connected with a flue gas inlet of a flue gas fan through a fourth flue gas pipeline, a flue gas outlet of the flue gas fan is connected with a chimney through a fifth flue gas pipeline, and an expansion joint is arranged at the flue gas inlet and the flue gas outlet of the flue gas fan respectively.

The invention provides an island garbage pyrolysis incineration system based on the harmless treatment of island household garbage. The system and the matched incineration process thereof mainly aim at the incineration treatment of all combustible organic matters such as domestic garbage, operation garbage and the like on islands and offshore platforms. By utilizing the combustible garbage pyrolysis gasification incineration treatment process, except for the fact that the first ignition needs to be assisted by consumption of auxiliary fuel, the operation treatment process can be continuously and stably operated without adding any auxiliary fuel, and after smoke generated by combustion is treated by the smoke, the index of the discharged smoke meets the requirement of GB18485-2014 'control standard for domestic garbage incineration pollution'.

In a word, the invention has the advantages of on-site waste incineration treatment, high efficiency, low auxiliary fuel consumption, less harmful gas generated in the incineration process, reduction of environmental pollution in the waste treatment process, and capability of well solving the problem of combustible waste stacking in special areas such as islands, offshore platforms and the like without municipal service far away from cities and towns.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a process flow diagram of the present invention.

Detailed Description

Example 1

The waste incineration system with pyrolysis gasification provided by the embodiment has a structure as shown in fig. 1, and comprises an automatic feeding device I, a pyrolysis gasification furnace II, a secondary combustion chamber III, a quenching deacidification device IV, a bag-type dust collector VI, a flue gas fan VIII and a chimney IX which are sequentially connected. Wherein, automatic feeding device I is used for throwing the material to 5 rubbish of feed inlet of pyrolysis gasifier II, and automatic feeding device I is fluid pressure type rubbish automatic lifting machine, mainly comprises garbage bin 1, drive chain mechanism 2, couple 3 and support 4, and drive chain mechanism 2 locates pyrolysis gasifier II's one side, and support 4 sets up on drive chain mechanism 2 and can reciprocate along it under drive chain mechanism 2's drive through couple 3, and couple 3 is used for fixed drive chain mechanism 2. The garbage can 1 is arranged on the bracket 4 and can move up and down along the bracket 4 under the drive of the transmission chain mechanism 2. The transmission chain mechanism 2 comprises a driving chain wheel, a driven chain wheel and a transmission chain arranged between the driving chain wheel and the driven chain wheel, and the driving chain wheel is driven by a motor to rotate. After the garbage can 1 is conveyed to the feed inlet 5 of the pyrolysis gasifier II by the transmission chain mechanism 2, the garbage can is automatically turned over under the action of a pneumatic device arranged on the transmission chain mechanism 2.

The pyrolysis gasifier II comprises a furnace body formed by furnace walls, a feed inlet 5 capable of being opened and closed automatically is arranged at the upper end of the furnace body, an ash outlet 14 capable of being opened and closed automatically is arranged at the lower end of the furnace body, the feed inlet 5 and the ash outlet 14 both have an operation locking function, namely, the furnace body cannot be opened by manual intervention during the operation of the pyrolysis gasifier II. The incinerator body is internally provided with an ashing layer, a burnout layer, a combustion layer, a pyrolysis and carbonization gasification layer and a drying layer in sequence from bottom to top, the pyrolysis and gasification layer is provided with a reversible grate 15, the grate 15 is made of heat-resistant cast steel, the grate 15 is communicated with an ash outlet 14 arranged on the ashing layer, the combustion layer is connected with a primary combustion device 6 arranged outside the incinerator body, and the primary combustion device 6 is a mechanical pressure type combustor with ignition. The drying layer is connected with the top of the second combustion chamber III through a first flue gas pipeline arranged at the top of the furnace body. The furnace body is connected with a primary air blower 11 through an air inlet pipe, an air supply proportion adjusting electric valve 12 is arranged on the air inlet pipe, the primary air blower 11 is arranged in the pyrolysis gasification furnace II and used for supplying a small amount of air into the pyrolysis gasification furnace II, the primary air supply quantity is strictly controlled and is determined according to the temperature in the pyrolysis gasification furnace II, the temperature in the pyrolysis gasification furnace II can be monitored by adopting a thermocouple, and the temperature in the pyrolysis gasification furnace II is controlled between 500 ℃ and 600 ℃. In addition, 20 air supply pipes 13 for pyrolysis are arranged on the furnace wall above the fire grate 15, air inlets of the air supply pipes 13 for pyrolysis are connected with the air inlet pipe, the primary air blower 11 supplies air to the air supply pipes 13 for pyrolysis, air outlets of the air supply pipes 13 for pyrolysis extend downwards to face the lower portion of the fire grate 15, and therefore air is supplied upwards through the lower portion of the fire grate 15. The pyrolysis gasification furnace II supplies air to the combustion layer of the furnace body through the primary air blower 11 and the air inlet pipe thereof to ensure oxygen-enriched combustion of the garbage, heat generated by garbage combustion rises from the combustion layer and is transmitted to the pyrolysis carbonization gasification layer and the drying layer, so that sufficient combustion and harmlessness of combustible gas are realized, and pyrolysis gasification and high-temperature combustion are organically combined in the whole process. The pyrolysis, dry distillation and gasification layer mainly contains volatile water and combustible gases such as carbon monoxide, hydrogen, tar and the like generated by pyrolysis and gasification; the dry layer is the pyrolysis gasification product rising from the pyrolysis gasification layer.

The second combustion chamber III is of a horizontal box body structure, four baffle plates are arranged in the horizontal box body structure, a flue gas inlet is formed in the left side of the upper end of the second combustion chamber III, a flue gas outlet is formed in the right side of the second combustion chamber III, and the flue gas outlet is connected with a quenching deacidification device IV through a second flue gas pipeline. And a secondary combustion device 7 is arranged on the left side of the secondary combustion chamber III, a secondary air blower 8 is arranged at the top of the secondary combustion chamber III, the secondary air blower 8 is connected with the inside of the secondary combustion chamber III through an air inlet pipe, and an ash outlet door 10 is arranged at the lower part of the secondary combustion chamber III. The secondary combustion chamber III is used for fully combusting the dried hot flue gas discharged from the pyrolysis gasifier II through a secondary combustion device 7, and the secondary combustion device 7 is a mechanical pressure type combustor with ignition. The second combustion chamber III is designed to be peroxide combustion and is provided with a secondary combustion device 7, and combustion-supporting air supplied to the second combustion chamber III exceeds the theoretical air quantity, so that waste gas entering the second combustion chamber III can be completely combusted. The second combustion chamber iii is also provided with a secondary blower 8. The temperature of the second combustion chamber III can also be monitored by adopting a thermocouple, and the temperature of the second combustion chamber III is controlled between 850 ℃ and 950 ℃. The incompletely combusted hydrocarbon is completely oxidized by the second combustion chamber III, and the volume reduction of the garbage in the whole garbage is more than 90%. In the high-temperature combustion process of the secondary combustion chamber III, the residence time of the flue gas is ensured to be more than 2s, and the generation of toxic and harmful substances such as dioxins is ensured to be inhibited.

The temperatures of the pyrolysis gasifier II and the second combustion chamber III and the blast quantities of the primary air blower 11 and the secondary air blower 8 are fully automatically controlled by a PLC, a temperature sensor, a pressure sensor and a frequency converter so as to ensure the safe and stable operation of the system.

The quenching deacidification device IV comprises a quenching deacidification tower and a quenching water tank, the top end of the quenching deacidification tower is provided with a flue gas outlet with a PT100 type temperature thermal resistor 9, the flue gas outlet is connected with a bag-type dust collector VI through a third flue gas pipeline, and an activated carbon adsorption spray gun V is arranged on the third flue gas pipeline. Activated carbon adsorption spray gun V is two fluid spray gun, constitute by nozzle and spray gun body, the nozzle material is hastelloy, the material of spray gun body is stainless steel S316L, the spray gun body comprises interior, the outer tube, the terminal surface of interior, the outer tube must be concentric, and including the adjustment connection, fastening screw between the outer tube ensures the center of inner tube at the outer tube, the inner tube is flowed through to the activated carbon, compressed air flows through the outer tube, the two gets into the nozzle after converging in the exit of spray gun body, like this can realize the adjustment of activated carbon injection volume through the pressure of adjustment injection compressed air. And (3) rapidly cooling the high-temperature flue gas from the second combustion chamber III to below 200 ℃ by a quenching deacidification device IV in a high-pressure atomization mode at the quenching temperature of more than 850 ℃. And the flue gas from the quenching deacidification device IV enters a bag-type dust remover VI through a third flue. And an activated carbon adsorption spray gun V sprays activated carbon to a third flue gas pipeline connected between the quenching deacidification device IV and the bag-type dust remover VI, the activated carbon is strongly mixed with the flue gas in the third pipeline to adsorb a part of pollutants, but the pollutants are not saturated, then the activated carbon and the flue gas enter a subsequent bag-type dust remover VI together, the activated carbon is intercepted on the surface of the filter bag and fully contacts with the flue gas slowly passing through the filter bag, and finally the adsorption purification of pollutants such as dioxin, heavy metals and the like in the flue gas is achieved.

The flue gas outlet of the bag-type dust collector VI is connected with the flue gas inlet of a flue gas fan VIII through a fourth flue gas pipeline, the flue gas outlet of the flue gas fan VIII is connected with a chimney IX through a fifth flue gas pipeline, and stainless steel expansion joints VII are respectively arranged at the flue gas inlet and the flue gas outlet of the flue gas fan VIII. After the flue gas enters the bag-type dust collector VI, the bag-type dust collector VI intercepts the reacted powder and fly ash to finish deacidification and dust removal treatment, the purified flue gas meets the requirements of GB18485-2014 'control standard for domestic waste incineration pollution', and the purified flue gas can be directly discharged into the atmosphere through a chimney IX.

In actual operation, the automatic feeding device I is used for automatically lifting the garbage can 1 to the feeding hole 5 of the pyrolysis gasification furnace II and lifting the garbage canThe garbage in the 1 is poured into a feeding hole 5 of the pyrolysis gasification furnace II, and the feeding hole 5 can be automatically closed after the garbage is poured. An ash outlet 14 is arranged right below the pyrolysis gasifier II, smoke is discharged from the ash outlet 14 by utilizing the inertial sedimentation principle, and a grate 15 is arranged at the lower part of the pyrolysis gasifier II. The garbage thrown from the feeding port 5 automatically slides to the grate 15, then the primary combustion device 6 is started, the primary air blower 11 is started, the air supply ratio adjusting electric valve 12 is adjusted, a small amount of air is supplied into the pyrolysis incinerator II, the primary air supply amount is strictly controlled, after the garbage is pyrolyzed and gasified, combustible gas is gradually generated, the temperature in the pyrolysis gasifier II is increased, and the temperature in the pyrolysis gasifier II is controlled between 500 ℃ and 600 ℃. The garbage is combusted in the pyrolysis gasification furnace II, flue gas generated after passing through the pyrolysis gasification layer and the combustion layer enters the burnout layer, and then enters the second combustion chamber III through a flue gas outlet at the top of the pyrolysis gasification furnace II. The second combustion chamber III adopts a box body baffling structure with an upper inlet and a side outlet, the smoke needs to go down and go up at first, the smoke in the second combustion chamber III is ignited and combusted through a secondary combustion device 7, the smoke is combusted completely in the second combustion chamber III, the temperature of the second combustion chamber III is controlled between 850 ℃ and 950 ℃, the retention time of the smoke in the second combustion chamber III is more than 2s, 99.99 percent of dioxin and other harmful components in the smoke are guaranteed to be decomposed, and the odor (H) can be effectively controlled₂S) and nitrogen oxides. An ash outlet door (10) is arranged below the second combustion chamber III, and smoke and dust can be removed at the ash outlet door 10 by utilizing the inertial sedimentation principle. The temperature of the high-temperature flue gas at the outlet of the second combustion chamber III is more than 850 ℃, and the high-temperature flue gas enters the quenching deacidification tower IV through the second flue to be quenched and deacidified. After the flue gas is quenched and deacidified, the temperature is reduced to below 200 ℃. The flue gas from the quenching deacidification tower IV is subjected to temperature detection through a flue gas thermal resistor 9, and when the temperature of the outlet flue gas is not in a set working range (generally set to 190 +/-5 ℃), a quenching system can automatically track and adjust related parameters such as water supply pressure and water spraying quantity, so that the temperature of the flue gas is ensured in the working range. And (3) before entering a bag-type dust collector VI, the flue gas from the quenching deacidification tower IV is sprayed by an activated carbon spraying gun V, so that the activated carbon is strongly mixed with the flue gas in a pipeline to adsorb a part of pollutants. Then passes through a bag-type dust collector VI to reachThe pollutants such as dioxin, heavy metal and the like in the flue gas are adsorbed and purified. After being purified, the flue gas enters an air duct, is pumped into a chimney IX by a flue gas fan VIII and is discharged outside.

The embodiment can conveniently solve the problem of treatment of combustible garbage in camps and districts which are far away from cities and towns and have no municipal service; the ignition process is simple to operate, a large amount of auxiliary fuel is not required to be added, only a small amount of auxiliary fuel (the auxiliary fuel is light diesel oil provided by a combustion device) is consumed during ignition, the flame temperature in the furnace is improved by reducing the excess air coefficient, the combustion condition is optimized, the generation of pollutants such as dioxin is effectively inhibited, and the efficient, stable and safe operation of incineration equipment is guaranteed; meanwhile, along with the reduction of the excess amount of air in the process parameters, the amount of flue gas generated by pyrolysis and incineration is reduced, so that the heat loss of the flue gas and the power of a draught fan motor can be reduced, the combustion efficiency is improved, and the investment and the operation cost of flue gas purification equipment can be reduced; after pyrolysis and incineration treatment, the index of the discharged flue gas meets the requirement of GB18485-2014 'pollution control Standard for incineration of domestic garbage'.

In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.

Claims

1. A waste incineration system with pyrolysis gasification, characterized in that: it comprises an automatic feeding device (I), a pyrolysis gasifier (II), a secondary combustion chamber (III), a quenching deacidification device ( IV), bag filter (VI), flue gas fan (VIII) and chimney (IX), between the quenching deacidification device (IV) and the bag filter (VI), there is an activated carbon adsorption spray gun (V), The temperature in the pyrolysis gasifier (II) is 500°C to 600°C.

2 . The waste incineration system with pyrolysis and gasification according to claim 1 , wherein the pyrolysis and gasification furnace (II) comprises a furnace body composed of furnace walls, and the furnace body is from bottom to top. 3 . An ashing layer, a pyrolysis gasification layer, a burning ember layer, a combustion layer, a pyrolysis dry distillation gasification layer, and a drying layer are arranged in sequence, and the pyrolysis gasification layer is provided with a reversible grate (15). The combustion layer is connected to the primary combustion device (6) arranged outside the furnace body, and the drying layer is connected to the top of the secondary combustion chamber (III) through the first flue gas duct arranged at the top of the furnace body.

3. The waste incineration system with pyrolysis and gasification according to claim 2, characterized in that: the furnace body is connected to the primary blower (11) through an air inlet pipe, and a supply air blower (11) is provided on the air inlet pipe. An electric valve (12) for adjusting the air ratio, and a plurality of supplementary air pipes (13) for pyrolysis are arranged on the furnace body above the grate (15). The air outlet is connected with the air inlet pipe, and the air outlet of the supplementary air pipe (13) for pyrolysis extends downward toward the lower part of the grate (15).

4. A waste incineration system with pyrolysis gasification according to claim 3, characterized in that: the upper end of the furnace body is provided with a feeding port (5) that can be automatically opened and closed, and the lower end is provided with a feed port (5) that can be automatically opened and closed. The ash outlet (14) is automatically opened and closed, and the ash outlet (14) is communicated with the grate (15).

5. The waste incineration system with pyrolysis and gasification according to claim 1, characterized in that: the automatic feeding device (I) consists of a trash can (1), a transmission chain mechanism (2), a hook (3) It is composed of a bracket (4), the transmission chain mechanism (2) is arranged on one side of the pyrolysis gasifier (II), and the bracket (4) is arranged on the transmission chain mechanism (2) through a hook (3). It can move up and down along the drive chain mechanism (2), and the trash can (2) is mounted on the bracket (4).

6 . The waste incineration system with pyrolysis and gasification according to claim 1 , wherein the secondary combustion chamber (III) has a horizontal box structure, and the horizontal box structure is provided with a plurality of folding folds. 7 . The flow plate, the left side of the upper end of the secondary combustion chamber (III) has a flue gas inlet, the right side of the secondary combustion chamber (III) has a flue gas outlet, and the flue gas outlet is separated from the quenching gas through the second flue gas pipeline The acid device (IV) is connected.

7. A waste incineration system with pyrolysis gasification according to claim 6, characterized in that: a secondary combustion device (7) is provided on the left side of the secondary combustion chamber (III), and a secondary combustion device (7) is provided on the top of the secondary combustion chamber (III). A blower (8), the secondary blower (8) is connected with the interior of the secondary combustion chamber (III) through an air inlet pipe, and the lower part of the secondary combustion chamber (III) is provided with an ash outlet door (10).

8. The waste incineration system with pyrolysis and gasification according to claim 1, wherein the quenching deacidification device (IV) comprises a quenching deacidification tower and a quenching water tank, and the top of the quenching deacidification tower is There is a flue gas outlet with a temperature thermal resistance (9), the flue gas outlet is connected to the bag filter (VI) through a third flue gas pipeline, and an activated carbon adsorption spray gun (V) is arranged on the third flue gas pipeline.

9. The waste incineration system with pyrolysis and gasification according to claim 1, characterized in that: the activated carbon adsorption spray gun (V) is composed of a nozzle and a spray gun body, and the material of the spray gun body is S316L, and the material of the nozzle is S316L. for Hastelloy.

10. The waste incineration system with pyrolysis and gasification according to claim 1, wherein the flue gas outlet of the bag filter (VI) passes through the connection between the fourth flue gas pipeline and the flue gas fan (VIII). The flue gas inlet is connected, the flue gas outlet of the flue gas fan (Ⅷ) is connected with the chimney (IX) through the fifth flue gas pipeline, and the flue gas inlet and the flue gas outlet of the flue gas fan (Ⅷ) are respectively set. There are expansion joints (VII).