CN115751322A

CN115751322A - Thermal plasma synergistic domestic waste pyrolysis treatment system

Info

Publication number: CN115751322A
Application number: CN202211409732.7A
Authority: CN
Inventors: 徐云
Original assignee: Zhongke Yunyue Beijing Technology Development Co ltd
Current assignee: Zhongke Yunyue Beijing Technology Development Co ltd
Priority date: 2022-11-10
Filing date: 2022-11-10
Publication date: 2023-03-07

Abstract

The invention provides a thermal plasma synergistic domestic garbage pyrolysis treatment system which comprises a pyrolysis furnace, wherein a fire grate is arranged at the bottom of the pyrolysis furnace, a primary air supply outlet is formed below the fire grate, a stirrer for supplying secondary air supply is arranged between the pyrolysis furnace and the fire grate, and a smoke outlet is formed in the upper end of the pyrolysis furnace and communicated with a thermal plasma incineration chamber. Through setting up the agitator that supplies secondary air supply concurrently, can make rubbish evenly distributed when the pyrolysis oven material loading to supply the air to promote rubbish dry and fully burn, the rethread sets up hot plasma incineration chamber and handles the flue gas, has solved the drawback that the pyrolysis oven flue gas was handled.

Description

Thermal plasma cooperation domestic waste pyrolysis treatment system

Technical Field

The invention relates to the field of waste incineration treatment, in particular to a thermal plasma synergistic domestic waste pyrolysis treatment system.

Background

In the field of household garbage treatment, thermal treatment is used as a main mode of harmless, quantitative reduction and resource treatment, and is divided into direct incineration (mechanical grate furnace, fluidized bed incinerator, rotary kiln) and pyrolysis (gasification). The large-scale garbage incineration and power generation technology (the daily treatment is 500 tons or more) has better operation stability, environmental protection discharge indexes and economy. However, for the treatment of domestic garbage with daily treatment less than 200 tons, especially less than 100 tons, smoldering and pyrolysis (gasification) type heat treatment technologies are mostly adopted at present.

The household garbage pyrolysis (smoldering and pyrolysis gasification) technology has certain advantages, for example, a pyrolysis furnace (a smoldering and pyrolysis gasification furnace) basically does not need to supplement secondary auxiliary energy (such as fuel gas, fuel oil and the like) after ignition, the fly ash production amount is less, and the requirement on garbage classification is not very high. However, the pyrolysis technology of garbage still has the following disadvantages:

the garbage in the pyrolysis furnace is naturally burnt in a relatively static state, the treatment period is long, the burning is limited by the humidity of the garbage and is not thorough, and the tar content of flue gas is large; the treatment to tar and flue gas etc. that the pyrolysis process produced, be difficult to realize the emission of reaching standard under suitable fortune dimension cost, especially more outstanding when rubbish water content and burning value are difficult to satisfy the design operating mode. In order to achieve the end emission reaching the standard, fuel oil or fuel gas must be sprayed into the pyrolysis product combustion chamber, and high-temperature oxidation combustion treatment is carried out on tar, carbon monoxide, hydrogen, methane and other harmful gases generated by pyrolysis. The additive is used as fuel oil or fuel gas of light fossil fuel, so that the operation and maintenance cost of garbage treatment is greatly increased, and the additive does not meet the current low-carbon treatment direction.

In view of the above, the present invention is particularly proposed.

Disclosure of Invention

The invention aims to provide a thermal plasma synergistic domestic garbage pyrolysis treatment system, which is characterized in that a stirrer for secondary air supply is arranged, so that garbage is uniformly distributed when a pyrolysis furnace is used for feeding, air is supplemented to promote drying and full incineration of the garbage, and flue gas is treated by arranging a thermal plasma incineration chamber, so that the defect of flue gas treatment of the pyrolysis furnace is overcome.

In order to achieve the above purpose of the present invention, the following technical solutions are adopted:

the invention provides a thermal plasma synergistic domestic garbage pyrolysis treatment system which comprises a pyrolysis furnace, wherein a fire grate is arranged at the bottom of the pyrolysis furnace, a primary air supply outlet is formed below the fire grate, a stirrer for supplying secondary air supply is arranged between the pyrolysis furnace and the fire grate, and a smoke outlet is formed in the upper end of the pyrolysis furnace and communicated with a thermal plasma incineration chamber.

The stirrer can also preferably convert secondary air supply into an oxygen supply function, and can convert the natural state passive pyrolysis of the garbage in the furnace into controllable pyrolysis through stirring and oxygen supply, thereby promoting the full incineration of the garbage, reducing the generation amount of smoke and preventing the coking of a hearth.

The thermal plasma incineration chamber can realize that fossil fuels such as fuel oil or fuel gas and the like are not consumed, organic matters such as tar, carbon monoxide, hydrogen, methane, peculiar smell, dioxin and the like generated by pyrolysis are removed, belongs to the low-carbon incineration treatment household garbage technology, and accords with the national low-carbon development policy.

Further, the stirrer comprises a main shaft with a hollow structure, the main shaft penetrates through the pyrolysis furnace and the grate, a secondary air inlet is formed in the top end of the main shaft, and a plurality of secondary air supply outlets are formed in the surface of the main shaft.

The agitator is by motor drive, realizes the function of air feed through the hollow structure of main shaft and the secondary supply-air outlet on surface, and the main shaft link up the setting between pyrolysis oven and grate and can realize the interior rubbish evenly distributed of stove, makes the thermal current homodisperse in the pyrolysis oven simultaneously, improves drying effect and treatment effeciency. The secondary air inlet at the top end of the main shaft can be arranged outside the pyrolysis furnace or inside the pyrolysis furnace.

Further, be provided with at least one stirring rake on the main shaft, the stirring rake is including paddle and support piece, the quantity of paddle is at least one. The number of the stirring paddles is preferably 3-4, and the stirring paddles are uniformly arranged on the main shaft, and the number of the stirring paddles is preferably 3-4, and the stirring paddles are uniformly arranged on the supporting piece.

Furthermore, the secondary air supply outlets are arranged on the peripheral side of the stirring paddle and are uniformly distributed on the surface of the main shaft, so that uniform dispersion of heat flow and controllable pyrolysis of the pyrolysis furnace are realized.

Furthermore, the fire grate is a single layer or a plurality of layers and has an adjustable heating function. The heating function of the grate can not only avoid using wood or fuel oil for supporting combustion, but also be matched with the stirrer to promote the drying of the garbage, so that the working conditions of the garbage can be properly treated under different weather conditions.

Furthermore, baffle plates are arranged at the top end and the bottom end of the thermal plasma incineration chamber, thermal plasma torches are arranged at the top end and the side wall of the thermal plasma incineration chamber, the thermal plasma torches and the baffle plates are arranged in a crossed mode, and an ash collecting hopper is arranged at the bottom of the thermal plasma incineration chamber.

The invention uses high-frequency high-voltage alternating current thermal plasma torches, the thermal plasma torch is one or a combination of several of vertical orientation and horizontal orientation, the temperature of the flame core is above 3000 ℃, the power of each thermal plasma torch is 2-10kw, the service life is longer than 2000 hours, a thermal field of more than 850 ℃ is formed inside the thermal plasma burning chamber through a plurality of thermal plasma torches, the thermal efficiency of the thermal plasma torch is up to 90 percent, which is obviously higher than the conventional technologies of fossil fuel burning and the like, and only electric energy is needed for driving, so that the invention can better and more economically perfect the process of the pyrolysis system, reduce the operation and maintenance cost, realize various environmental protection requirements, and better accord with the low-carbon treatment direction.

The baffle plate and the thermal plasma torch are arranged in a crossed manner, so that the flow path of the smoke in the thermal plasma incineration chamber is prolonged, the action time of the smoke and the thermal plasma torch is prolonged, harmful substances such as semi-coke substances, carbon monoxide, dioxin and the like mixed with tar and ash in the smoke are ensured to be sufficiently combusted and cracked, and finally most of particulate matters in the smoke and the incinerated ash are settled and fall into the ash collection hopper at the bottom.

Furthermore, heat exchange tubes are arranged in the inner side wall of the thermal plasma incineration chamber and an interlayer of the baffle plate, and the heat exchange tubes are transversely or longitudinally coiled. The heat exchange tubes are arranged in the interlayers of the inner side wall and the baffle plate, so that the thermal plasma incineration chamber has the function of a heat exchanger, the utilization of waste heat is improved, and the effects of energy conservation and environmental protection are realized.

Further, the thermal plasma incineration chamber is connected with a heat exchanger, and the heat exchanger is connected with a secondary air inlet of the main shaft and used for promoting drying and pyrolysis by utilizing waste heat. The rear end of the thermal plasma incineration chamber is connected with the heat exchanger, so that the waste heat of the flue can be reused, and the utilization efficiency of the waste heat is improved; the heat exchanger is cooled by natural wind and is connected with a secondary air inlet of the main shaft, secondary hot air can be formed and conveyed to the main shaft, and drying and pyrolysis of garbage are promoted in a stirring process.

Further, the heat exchanger is connected with a flue gas treatment device, the flue gas treatment device comprises a thermal plasma cracking device, and the thermal plasma cracking device is provided with a high-frequency high-voltage alternating-current electric field for cracking tail gas. The high-frequency high-voltage alternating-current thermal plasma technology only needs electric energy for driving, the thermal efficiency exceeds 90 percent, and the tail gas can be further treated.

Preferably, the flue gas treatment device connected behind the heat exchanger sequentially comprises a deacidification tower, a bag type dust collector, a thermal plasma cracking device, an induced draft fan and a chimney. Wherein the deacidification tower is provided with a spraying component, and the spraying component is internally stored with an absorbent containing a calcium hydroxide solution; the deacidification tower is also communicated with a dry type reaction device, and a purification component containing active carbon and lime powder is arranged in the dry type reaction device. The flue gas treatment device is provided with a perfect flue gas treatment process, so that the subsequent flue gas in the thermal plasma incineration chamber can be treated more completely, and the emission and environmental protection requirements are met.

Furthermore, the device also comprises a PLC combined with a dispersion type controller, wherein the controller is used for controlling the process parameters of the pyrolysis furnace and the thermal plasma incineration chamber. The controller is linked with devices such as a material level detector, a temperature sensor, a humidity sensor and the like in the pyrolysis furnace to detect garbage information in different seasons and different weather conditions, determine time parameters of feeding and discharging ash, automatically adjust power of related motors, a thermal plasma torch and the like, reduce power consumption and realize energy-saving and carbon-reducing effects.

Compared with the prior art, the invention has the beneficial effects that:

(1) According to the invention, the pyrolysis furnace is adopted to burn the garbage, the stirrer with the secondary air supply function is arranged in the pyrolysis furnace, the passive pyrolysis of the garbage in the natural state of the pyrolysis furnace in the prior art is converted into controllable pyrolysis, the garbage in the furnace can be uniformly distributed under the action of stirring and air supplement, the waste drying is promoted by using the waste heat air, the full burning of the garbage is promoted by using the supplemented air, the generation amount of smoke is reduced, and the coking of a hearth is prevented.

(2) According to the invention, the thermal plasma incineration chamber, the heat exchanger and the flue gas treatment device are sequentially arranged at the flue gas outlet of the pyrolysis furnace, so that the subsequent flue gas is treated to achieve standard emission, and the defects of the pyrolysis furnace are overcome.

(3) The invention adopts the high-frequency high-voltage alternating-current thermal plasma technology, only needs to be driven by electric energy, has the thermal efficiency of over 90 percent, has better pyrolysis effect and lower operation and maintenance cost, does not consume fossil fuels such as fuel oil or gas and the like compared with the prior garbage treatment technology, belongs to low-carbon incineration and better accords with the national low-carbon development policy.

(4) The fire grate adopted by the invention has an adjustable heating function, can not only avoid using wood or fuel oil and the like for supporting combustion, but also can be matched with the stirrer to promote drying of the garbage, so that the working condition of the garbage can be properly treated under different weather conditions.

(5) The thermal plasma incineration chamber designed by the invention has a unique structure, and the heat exchange tubes are arranged on the inner side wall and the baffle plate interlayer, so that the thermal plasma incineration chamber has the function of a heat exchanger, and the waste heat resources are effectively utilized. The thermal plasma torch and the baffle plate in the thermal plasma incineration chamber are arranged in a crossed manner, so that the full combustion and cracking of the flue gas can be ensured, and the sedimentation of particulate matters and incinerated ash in the flue gas can be promoted.

(6) The invention can be linked with devices such as a material level detector, a temperature sensor, a humidity sensor and the like by combining the PLC with the decentralized controller so as to detect garbage information, determine time parameters of feeding and discharging ash slag, automatically adjust power of related motors, a thermal plasma torch and the like, reduce power consumption and realize energy-saving and carbon-reducing effects.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is a schematic view of an overall structure of a waste pyrolysis treatment system according to an embodiment of the present invention;

FIG. 2 is a schematic view of a stirrer according to an embodiment of the present invention;

fig. 3 is a schematic view of a heat exchange tube according to an embodiment of the present invention.

The system comprises a pyrolysis furnace 1, a garbage inlet 2, an observation window 3, a driving motor 4, an explosion venting device 5, a stirrer 6, a grate 7, a primary air supply outlet 8, an ash discharge channel 9, an ash chamber 10, a screw slag extractor 11, an ash discharge outlet 12, a secondary air inlet 13, a main shaft 14, a support 15, a blade 16, a secondary air supply outlet 17, a thermal plasma incineration chamber 18, a thermal plasma torch 19, a baffle plate 20, an ash collecting hopper 21, an ash collecting hopper 22, a water outlet 23, a water inlet 24, a heat exchange pipe 25, an inner side wall 26, a heat exchanger 26, a deacidification tower 27, an activated carbon spray adsorption device 28, a bag type dust remover 29, an ash collecting device 30, a thermal plasma cracking device 31, an induced draft fan 32 and a chimney 33.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.

Example 1

As shown in fig. 1, the present embodiment provides a thermal plasma-assisted domestic waste pyrolysis treatment system, which is mainly formed by sequentially connecting a pyrolysis furnace 1, a thermal plasma incineration chamber 18, a heat exchanger 26 and a flue gas treatment device.

Firstly, garbage enters the interior of the pyrolysis furnace 1 through the garbage inlet 2, and is finally stacked on the grate 7 at the bottom of the pyrolysis furnace 1 to be pyrolyzed and incinerated. The bottom of the fire grate 7 is provided with an inclined ash discharging channel 9, ash generated after incineration is deposited in an ash chamber 10 through the ash discharging channel 9, and the bottom of the ash chamber 10 is provided with a screw slag discharger 11 and a corresponding ash discharging port 12 for discharging the ash.

The grate 7 is designed in a single layer or multiple layers, two layers are arranged in the embodiment, and the adjustable heating function is achieved; through the regulation and control to the heating effect, can also promote the dry of rubbish in the stove to the adaptation is handled the rubbish of different humidity under different weather and environment.

Wherein, one side of the ash slag discharge channel 9 is provided with a primary air supply outlet 8, and air is supplied into the furnace through an external fan. The top of the pyrolysis furnace 1 is also provided with a quartz glass observation window 3 for timely checking the conditions in the furnace; a humidity sensor, a temperature sensor and a material level detector are arranged in the pyrolysis furnace 1; explosion venting devices 5 are arranged at the top of the pyrolysis furnace 1 and the top of the front end and the middle section of the thermal plasma incineration chamber 18.

Wherein, a stirrer 6 is arranged between the pyrolysis furnace 1 and the fire grate 7, so that the garbage in the furnace can be uniformly dispersed, and the stirrer 6 is driven by a driving motor 4 at the top of the pyrolysis furnace 1 and also has the function of secondary air supply. By controlling the stirring effect and the speed of supplementing air or oxygen, the passive pyrolysis of the garbage in the furnace in the natural state can be converted into controllable pyrolysis, the full incineration of the garbage is promoted, and the coking of a hearth is prevented; the stirrer 6 can also be matched with the fire grate 7 to uniformly disperse heat flow, further promote the drying of garbage in the furnace and reduce the tar content of flue gas.

As shown in fig. 2, the stirrer 6 is composed of a main shaft 14 having a hollow structure, a secondary air inlet 13 is formed at the top of the main shaft 14, and a plurality of secondary air supply outlets 17 are uniformly arranged on the surface of the main shaft 14, so that air in the main shaft 14 can be uniformly supplied to all directions of the pyrolysis furnace 1. Three stirring paddles are uniformly distributed on the main shaft 14, each stirring paddle consists of a paddle 16 and a support piece 15, four paddles 16 are uniformly distributed on the support piece 15, and a secondary air supply outlet 17 is arranged on the peripheral side of each stirring paddle. It can be understood that the number of the stirring paddles on the main shaft 14 is only limited to at least one, and the specific number can be increased or decreased according to actual conditions; the number of the blades 16 is only limited to at least one, and the specific number can be increased or decreased according to the actual situation; the shape and arrangement of the blades 16 are not limited in the present invention, as long as the stirring operation is satisfied.

The pyrolysis furnace 1 is connected with the thermal plasma incineration chamber 18 through the flue gas passageway, and a plurality of thermal plasma torch 19 has been arranged to the top and the lateral wall of thermal plasma incineration chamber 18, and thermal plasma torch 19 can be vertical orientation, the combination of one or several kinds in the horizontal orientation, and in this embodiment, the thermal plasma torch 19 on thermal plasma incineration chamber 18 top is vertical orientation, and the thermal plasma torch 19 of lateral wall is horizontal orientation.

The high-frequency high-pressure alternating-current thermal plasma torch 19 is used, the temperature of a flame core is more than 3000 ℃, the power of each thermal plasma torch 19 is 2-10kw, the service life is longer than 2000 hours, a thermal field of more than 850 ℃ is formed inside the thermal plasma incineration chamber 18 through a plurality of thermal plasma torches 19, the thermal efficiency of the thermal plasma torch 19 is as high as 90%, only electric energy is needed for driving, the process of a pyrolysis system can be better and more economically completed, the operation and maintenance cost is reduced, various environmental protection requirements are realized, and the low-carbon treatment direction is better met.

In addition, the bottom end of the thermal plasma incineration chamber 18 is provided with an ash collecting hopper 21, the top end and the bottom end are provided with baffle plates 20, the baffle plates 20 and the thermal plasma torch 19 are arranged in a crossed mode, so that the flow path of the smoke in the thermal plasma incineration chamber 18 is prolonged, the action time of the smoke and the thermal plasma torch 19 is prolonged, the full combustion and cracking of harmful substances such as tar and ash mixed semicoke substances, carbon monoxide and dioxin in the smoke are ensured, and finally most of particulate matters in the smoke and the burned ash are settled and fall into the ash collecting hopper 21 at the bottom.

The heat exchange tube 24 is arranged in the interlayer of the inner side wall 25 and the baffle plate 20 of the thermal plasma incineration, as shown in fig. 3, the heat exchange tube 24 is transversely or longitudinally coiled in the interlayer, and the water outlet 22 and the water inlet of the heat exchange tube extend out of the thermal plasma incineration chamber 18, so that the thermal plasma incineration chamber 18 has the function of the heat exchanger 26, the waste heat generated in the waste flue gas incineration process is fully utilized, and the effects of energy conservation and environmental protection are realized.

The rear end of the thermal plasma incineration chamber 18 is connected with a heat exchanger 26, waste heat of a flue is reused, and waste heat utilization efficiency is improved. The heat exchanger 26 is cooled by natural wind, the interior of the heat exchanger is connected with the main shaft 14 of the stirrer 6 through a gas pipe, hot wind formed in the heat exchanger 26 can be conveyed to the main shaft 14 and supplied to the pyrolysis furnace 1, and waste heat is utilized to promote drying and pyrolysis of garbage.

The rear end of the heat exchanger 26 is connected with a flue gas treatment device which comprises a deacidification tower 27, a bag type dust collector 29, a thermal plasma cracking device 31, an induced draft fan 32 and a chimney 33 in sequence, and the subsequent flue gas generated by the pyrolysis furnace 1 and the thermal plasma incineration chamber 18 is treated more completely.

Wherein, a spraying component is arranged in the deacidification tower 27, and an absorbent containing a calcium hydroxide solution is stored in the spraying component; the deacidification tower 27 is also communicated with a dry type reaction device, and the dry type reaction device is provided with an activated carbon jet adsorption device 28; the dry type reaction device is communicated with a bag-type dust collector for filtering particulate matters, a pulse valve is arranged in the bag-type dust collector, and an ash collecting device 30 is arranged at the bottom of the bag-type dust collector; the sack cleaner communicates with hot plasma cracker 31, be provided with the high frequency high pressure alternating current electric field that is used for the schizolysis tail gas among the hot plasma cracker, carry out the schizolysis to the flue gas, discharge from chimney 33 up to standard through draught fan 32 at last.

On the other hand, the invention also adopts PLC to combine with a decentralized controller to control the system, the controller controls the thermal plasma incineration chamber 18 and the thermal plasma cracking device 31 at the tail end of the system in real time by regulating and controlling the power of a motor and the like, so that the gas phase generated by the pyrolysis furnace 1 is fully incinerated and cracked, and substances such as tar, carbon monoxide, hydrogen, methane, nitrogen oxides, peculiar smell, dioxin and the like generated by pyrolysis are removed to the maximum extent; simultaneously can also with the linkage of devices such as material level detector, temperature sensor, humidity transducer in the pyrolysis oven 1 to detect rubbish information, confirm the time parameter of feeding and discharge lime-ash, relevant motor and thermal plasma torch 19 isopower of automatic adjustment reduce the consumption, realize energy-conservation and carbon effect.

In a word, the invention uses the pyrolysis furnace 1 to carry out pyrolysis and incineration of the garbage, uses the thermal plasma incineration chamber 18 and the thermal plasma cracking device 31 to carry out incineration and cracking of the flue gas, avoids the consumption of fossil fuels such as fuel oil, fuel gas and the like, and also sets the stirrer 6, the heat exchange tube 24, the heat exchanger 26 and other devices to fully utilize the waste heat, fully incinerates the garbage in the pyrolysis furnace 1, prevents the hearth from coking, belongs to the low-carbon incineration domestic garbage treatment technology, and accords with the national low-carbon development policy; the subsequent flue gas treatment device is arranged, the defect that flue gas and tar are difficult to treat in the pyrolysis furnace 1 is overcome, the process of a pyrolysis system is perfected, and various environmental protection requirements are met.

Finally, it is to be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not intended to be limiting. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle and spirit of the invention, and such modifications and improvements are also considered to be within the scope of the invention.

Claims

1. The thermal plasma and domestic garbage combined pyrolysis treatment system is characterized by comprising a pyrolysis furnace, wherein a fire grate is arranged at the bottom of the pyrolysis furnace, a primary air supply outlet is formed in the lower portion of the fire grate, a stirrer for supplying secondary air supply is arranged between the pyrolysis furnace and the fire grate, and a smoke outlet is formed in the upper end of the pyrolysis furnace and communicated with a thermal plasma incineration chamber.

2. The pyrolysis treatment system of claim 1, wherein the stirrer comprises a main shaft with a hollow structure, the main shaft penetrates through the pyrolysis furnace and the grate, a secondary air inlet is formed in the top end of the main shaft, and a plurality of secondary air supply outlets are formed in the surface of the main shaft.

3. The system of claim 2, wherein the main shaft is provided with at least one paddle, the paddle comprises at least one paddle and a support, and the number of the paddles is at least one.

4. The system of claim 3, wherein the secondary air supply outlets are opened on the periphery of the stirring paddle and are uniformly distributed on the surface of the main shaft, so as to realize uniform dispersion of heat flow and controllable pyrolysis of the pyrolysis furnace.

5. The pyrolytic treatment system of claim 1 wherein the grate is single or multi-layered with controllable heating.

6. The pyrolytic treatment system according to claim 1, wherein the top end and the bottom end of the thermal plasma incineration chamber are provided with baffle plates, the top end and the side wall of the thermal plasma incineration chamber are provided with thermal plasma torches, the thermal plasma torches and the baffle plates are arranged in a crossed manner, and the bottom of the thermal plasma incineration chamber is provided with an ash collecting hopper.

7. A pyrolytic treatment system according to claim 6 wherein heat exchange tubes are arranged in the inner side wall of the thermal plasma incineration chamber and the interlayer of the baffle plate, and the heat exchange tubes are arranged in a transverse or longitudinal coiling manner.

8. The pyrolytic processing system according to claim 2, wherein the thermal plasma incineration chamber is connected with a heat exchanger, and the heat exchanger is connected with a secondary air inlet of the main shaft and is used for promoting drying and pyrolysis by using waste heat.

9. The pyrolytic treatment system according to claim 8 wherein the heat exchanger is connected with a flue gas treatment device comprising a thermal plasma cracking device provided with a high frequency high voltage alternating current electric field for cracking off-gas.

10. The pyrolytic treatment system of claim 1 further comprising a PLC in combination with a decentralized controller for controlling process parameters of the pyrolysis furnace and the thermal plasma incineration chamber.