CN106705062B - Treatment process and treatment device applied to the secondary combustion chamber of domestic waste pyrolysis furnace - Google Patents

Abstract

The invention discloses the dual firing chamber's treatment process and processing unit that are applied to domestic garbage pyrolysis furnace, which is: 1) entering in deep combustion area combustible pyrolysis's conductance that pyrolysis oven generates and be sufficiently mixed with Secondary Air, burn；2) high-temperature tail gas that the burning of deep combustion area generates is imported into baffling depositing dust area, and conveyed from lower to upper, high-temperature tail gas is discharged from baffling depositing dust area top after multistage depositing dust and baffling in baffling depositing dust area and is sent into exhaust gas purification system.The processing unit includes the deep combustion area and baffling depositing dust area that bottom is connected, and deep combustion area is equipped with air inlet, and baffling depositing dust area is equipped with annular escape pipe；The processing unit further includes flue-dust retainer and ash hole.The present invention has many advantages, such as that system operatio is easy, process control is strong, pyrolysis is high-efficient, second-time burning is abundant, baffling depositing dust is efficient, pollutant concentration is low, exhaust emissions amount is small, investment and operating cost save, and can be widely applied to application of city life garbage pyrolysis processing field.

Description

Treatment process and treatment device applied to the secondary combustion chamber of domestic waste pyrolysis furnace

technical field

The invention relates to the field of domestic waste pyrolysis gasification combustion treatment, in particular to a secondary combustion chamber treatment process and a treatment device applied to a domestic waste pyrolysis furnace.

Background technique

In recent years, with the strengthening of environmental protection awareness and the successive introduction of increasingly strict national environmental protection regulations and policies, the "harmless, reduced and recycled" disposal of domestic waste has become the basic principle followed by all countries. Waste pyrolysis technology As one of the effective ways to realize this principle, it has gradually been recognized by the industry. The core of waste pyrolysis technology lies in the pyrolysis furnace, whose structure mainly includes a pyrolysis gasifier and a secondary combustion chamber. The domestic waste generates low-molecular-weight combustible gas through the pyrolysis gasifier, and enters the secondary combustion chamber through a reasonable gas guiding device for deep combustion. The above two process steps must be strictly distinguished and operated independently, and they must be mutually complementary and organic. Combined, the integration and high integration of pyrolysis gasification and combustion purification process are finally realized.

The structure of the existing domestic waste pyrolysis furnace is mainly divided into two types. The first type adopts a vertical coaxial sleeve structure, that is, it consists of a vertical pyrolysis gasification furnace and an annular secondary combustion chamber cavity surrounding it. , the combustible gas generated by the pyrolysis of the domestic garbage through the pyrolysis gasification furnace enters the secondary combustion chamber through the air guide channel arranged on the furnace wall. The gas is burned in the chamber and finally purified by the exhaust gas treatment system and then discharged up to the standard. This structure has the advantages of saving land, easy operation, and direct utilization of combustion heat. However, the temperature of the pyrolysis furnace will fluctuate with the change of the combustion conditions of the second combustion chamber. , the temperature controllability of the pyrolysis process is poor, and the structure is relatively complex and difficult to maintain and repair; the other type adopts a vertical or horizontal split structure, and the pyrolysis gasifier and the secondary combustion chamber are divided into two independent structural units. The two are connected through an air-conducting pipe. The structure has the characteristics of simple structure, accurate temperature control, and convenient maintenance. In addition, the above two types of domestic waste pyrolysis furnaces currently commonly used still have the following common problems: ① The structural design of the pyrolysis gasifier is not reasonable, such as uneven feed distribution, insufficient air distribution and oxygen supply, and the grate is easily blocked and easily jammed It is not equal to the gas collection and air conduction, which directly affects the pyrolysis gasification efficiency and the subsequent deep combustion effect; (2) The internal structure of the secondary combustion chamber needs to be optimized, and there are mainly the following problems: First, the combustion area and the baffled dust reduction area are mixed together. It is impossible to accurately control the combustion process and the baffled dust reduction process, and thus cannot achieve effective control of toxic and harmful substances such as dioxins and metal dust; second, the design of the combustion area is not reasonable, because the pyrolysis gas enters the secondary combustion through the gas guide pipe. At the moment of the chamber, the combustion area is suddenly enlarged too much, so that the concentration of the pyrolysis gas is too low, and the speed also drops rapidly, resulting in uneven mixing of the pyrolysis gas and the combustion-supporting secondary air, and insufficient combustion. Large secondary air volume or supplementary fuel is used for auxiliary combustion, which will increase operating costs and exhaust emissions; third, the air collection and air guide system and the baffle dust reduction structure are simple, and the gas collection and air guide positions of the pyrolysis gas Improper setting of the air intake direction and the air intake direction makes the mixing of the pyrolysis gas and the secondary air uneven, which affects the combustion efficiency. At the same time, the structure of the deflected dust reduction area is too simple, which cannot ensure the effective residence time of the flue gas and the dust reduction effect, and suppress the dioxin. The effect of British synthesis is poor, and it cannot completely solve the generation and discharge of secondary pollutants such as dioxins and heavy metals.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a two-combustion chamber treatment process and treatment device applied to a domestic waste pyrolysis furnace. By using an independently operated deep combustion zone and a baffled dust-reducing zone, the emission of dioxins can be fundamentally suppressed. It can effectively control the amount of secondary pollutants and tail gas emissions, reduce the burden on the tail gas treatment system, thereby reduce equipment investment and operation and maintenance costs, and realize the harmless and reduced treatment of urban domestic waste.

The present invention solves the above-mentioned technical problems with the following technical solutions:

Invention 1 is applied to a secondary combustion chamber treatment process of a domestic waste pyrolysis furnace, which includes the following operation steps:

1) The combustible pyrolysis gas generated by the pyrolysis furnace is introduced into the upper part of the deep combustion zone located in the center of the secondary combustion chamber. The combustible pyrolysis gas passes through the deep combustion zone from top to bottom, and is fully compatible with the secondary air entering the deep combustion zone. mixing, burning;

2) The high-temperature exhaust gas generated by the combustion of the deep combustion zone is introduced from the bottom of the deep combustion zone into the baffled dust-reducing zone outside the deep-burning zone, and transported from bottom to top. After baffled, it is discharged from the upper part of the baffled dust-reducing area and sent to the exhaust gas purification system.

The second invention is a secondary combustion chamber treatment device applied to a domestic waste pyrolysis furnace. The device includes a secondary combustion chamber shell, the secondary combustion chamber casing is provided with a deep combustion zone and a baffled dust reduction zone, and the deep combustion zone is arranged in the secondary combustion chamber. In the center of the shell, the baffled dust reduction area is located outside the deep combustion area, and the deep combustion area is connected with the bottom of the baffled dust reduction area; the upper part of the deep combustion area is provided with a tangentially connected air inlet, and the baffled dust reduction area The upper part is provided with an annular outlet pipe that collects and guides the exhaust gas into the exhaust gas purification system; the lower part of the secondary combustion chamber shell is provided with an ash collecting hopper located under the deep combustion area and the baffled dust reduction area, and the bottom of the secondary combustion chamber housing is provided with Ash outlet.

The deep combustion zone is in the shape of a circular straight tube, the top of which is closed, the combustible pyrolysis gas generated by the pyrolysis furnace is introduced into the deep combustion zone through the air inlet, and the deep combustion zone is provided with a plurality of secondary air supply ports and a plurality of The burner has a flared air outlet at the bottom of the deep combustion zone.

The air inlet at the upper part of the deep combustion zone is provided with a pyrolysis gas monitoring hole, a gas monitoring device is installed in the pyrolysis gas monitoring hole, and the diameter of the air inlet is smaller than the inner diameter of the deep combustion zone.

The baffled dust reduction area is the cavity area between the deep combustion area and the inner wall of the second combustion chamber shell. The annular air outlet at the upper part of the baffled dust reduction area is provided with an exhaust gas monitoring hole, and a gas monitoring device is installed in the exhaust gas monitoring hole. The middle and lower part of the combustion zone is provided with a baffle guide table and a dust reduction orifice plate. The baffle guide table is located above the dust reduction orifice plate.

The baffle guide table is provided with a plurality of, and the baffle guide table is a downwardly inclined annular inclined table made of refractory and wear-resistant material, and its inclination is ≥45°.

An observation hole, a combustion gas monitoring hole, a compressed air soot blowing pipe and an inspection port are installed on the casing of the second combustion chamber.

The middle of the ash collecting hopper is provided with a fire blocking grille.

The secondary air supply port and the burner are not equidistantly arranged in the deep combustion zone from top to bottom.

Compared with the prior art, the present invention has the following beneficial effects:

1. The independent operation of the deep combustion area and the deflected dust reduction area in the secondary combustion chamber is adopted to optimize the gas collection and air guiding system, the secondary combustion chamber structure and the overall pyrolysis combustion process, so as to realize the step-by-step precise control of the deep combustion and the deflected dust reduction process. Fundamentally inhibit the production of dioxins;

2. The deep combustion area adopts the optimal combination of tangential air inlet, non-equidistant secondary air supply port and trumpet-shaped air outlet. The structure design is reasonable and novel. While the pyrolysis gas is completely burned, the secondary air is reduced as much as possible. It can effectively control the concentration of pollutants and exhaust emissions, reduce the burden on the exhaust gas treatment system, and reduce equipment investment and operation and maintenance costs;

3. The baffled and dust-reducing area efficiently removes metal dust and other dust particles in the high-temperature exhaust gas by setting the fire-blocking grille, the dust-reducing orifice plate and the baffled guide table for multi-stage dust reduction and baffle action, and ensures that the high-temperature exhaust gas is in the second stage. Staying in the combustion chamber for enough time will fundamentally destroy the synthesis conditions of toxic and harmful secondary pollutants such as dioxins, and realize the harmless treatment of urban domestic waste.

4. The present invention has the advantages of simple system operation, strong process controllability, high pyrolysis efficiency, sufficient secondary combustion, high efficiency of deflecting and dust reduction, low pollutant concentration, small exhaust emission, low investment and operating cost, etc., and can be widely used. It is used in the field of urban domestic waste pyrolysis treatment.

Description of drawings

1 is a schematic front view of a secondary combustion chamber treatment device of the present invention applied to a domestic waste pyrolysis furnace;

Figure 2 is a schematic front view of the deep combustion zone in Figure 1;

Fig. 3 is the front view schematic diagram of the deflecting dust-reducing area in Fig. 1;

Fig. 4 is the top view schematic diagram of the fire-stop grill in Fig. 3;

Fig. 5 is the top view schematic diagram of the dust-reducing flower orifice plate in Fig. 3;

Figure 6 is a schematic front view of the dust-reducing flower orifice plate in Figure 3;

Fig. 7 is the top view schematic diagram of baffle guide table in Fig. 3;

Figure 8 is a schematic front view of the baffle guide table in Figure 3;

FIG. 9 is a schematic top view of the annular air outlet pipe in FIG. 3 .

In the picture: 1-deep combustion zone, 1-1 air inlet, 1-2 combustion section, 1-3 secondary air supply port, 1-4 burner, 1-5 air outlet, 1-6 pyrolysis gas monitoring Holes, 2-baffle dust reduction area, 2-1 fire blocking grille, 2-2 dust reduction flower plate, 2-3 baffle guide table, 2-4 combustion gas monitoring hole, 2-5 observation hole, 2-6 Exhaust gas monitoring hole, 2-7 annular outlet pipe, 2-8 compressed air soot blowing pipe, 2-9 inspection port, 2-10 ash collecting hopper, 2-11 ash outlet, 3- secondary combustion chamber shell.

Detailed ways

The technical scheme of the present invention is further described below:

The invention is applied to the secondary combustion chamber treatment process of the domestic waste pyrolysis furnace, and specifically includes the following operation steps:

1) The combustible pyrolysis gas generated by the pyrolysis furnace is introduced into the upper part of the deep combustion zone located in the center of the secondary combustion chamber. The combustible pyrolysis gas passes through the deep combustion zone from top to bottom, and is fully compatible with the secondary air entering the deep combustion zone. mixing, burning;

2) The high-temperature exhaust gas generated by the combustion of the deep combustion zone is introduced from the bottom of the deep combustion zone into the baffled dust-reducing zone outside the deep-burning zone, and transported from bottom to top. After baffled, it is discharged from the upper part of the baffled dust-reducing area and sent to the exhaust gas purification system.

The processing device used to implement the above-mentioned treatment process is shown in Figures 1-9. In order to make the accompanying drawings concise, only the parts relevant to the present invention are schematically shown in the figures, and the parts in the figures have the same structure or function, Only one of them is indicated schematically.

As shown in Figure 1-Figure 3, the present invention is applied to the two-combustion chamber treatment device of the domestic waste pyrolysis furnace and comprises a cylindrical two-combustion chamber casing 3, and the two-combustion chamber casing 3 is provided with a deep combustion zone 1 and a Baffled dust reduction area 2, deep combustion area 1 and baffled dust reduction area 2 are independent units of each other, and implement partitioned operation. The deep combustion zone 1 is arranged in the center of the secondary combustion chamber shell 3, the baffled dust reduction zone 2 is located outside the deep combustion zone, and the deep combustion zone 1 communicates with the bottom of the baffled dust reduction zone 2; the upper part of the deep combustion zone 1 is provided with The air inlet 1-1 connected tangentially, the upper part of the deflected dust reduction zone 2 is provided with an annular outlet pipe 2-7 that collects and guides the exhaust gas into the exhaust gas purification system; And the ash collecting hopper 2-10 below the baffled dust-reducing area, and the bottom of the secondary combustion chamber shell 3 is provided with an ash outlet 2-11.

As shown in FIG. 2 , the deep combustion zone 1 has a circular straight tubular structure with a closed top end. The deep combustion zone 1 is provided with an air inlet 1-1, a combustion section 1-2 and an air outlet 1-5. The gas port 1-1 and the gas outlet 1-5 are located at the top and bottom of the combustion section 1-2, respectively. The combustible pyrolysis gas generated by the pyrolysis furnace is introduced into the combustion section 1-2 through the air inlet 1-1, and the air intake The diameter of the port 1-1 is smaller than the inner diameter of the deep combustion zone; the combustion section 1-2 is provided with multiple secondary air supply ports 1-3 and multiple burners 1-4, which are arranged non-equidistantly from top to bottom; The air ports 1-5 are horn-shaped air outlets. The high-temperature exhaust gas is instantly expanded and decelerated through the bell mouth, which can improve the dust reduction effect and increase the residence time of the exhaust gas in the high temperature section.

As shown in Fig. 2, the air inlet 1-1 adopts a tangential air inlet mode, one end of the air inlet 1-1 is connected with the annular gas collecting pipe for collecting the combustible pyrolysis gas generated by the pyrolysis gasifier, and the other One end is tangentially screwed into the deep combustion zone 1, the air inlet 1-1 is provided with a pyrolysis gas monitoring hole 1-6, and a gas monitoring device is installed in the pyrolysis gas monitoring hole 1-6, and the monitoring data includes the pyrolysis gas. Flow, pressure, temperature and concentration, the above process parameters are respectively connected with the automatic control system through the transmission line; the diameter of the air inlet 1-1 is smaller than the inner diameter of the combustion section 1-2.

As shown in FIG. 3 , the baffle sedimentation zone 2 is a cavity area between the deep combustion zone 1 and the inner wall of the secondary combustion chamber shell 3 , and the annular gas outlet 2-7 on the upper part of the baffled dust reduction zone 2 is provided with exhaust gas monitoring Holes 2-6 and exhaust gas monitoring holes 2-6 are equipped with gas monitoring devices. The monitoring data includes the flow rate, pressure, temperature and concentration of pyrolysis gas. The above process parameters are respectively connected with the automatic control system through transmission lines; The middle and lower part are provided with a baffle guide table 2-3 and a dust reduction flower hole plate 2-2. The baffle guide table 2-3 is located above the dust reduction flower hole plate 2-2. The high temperature exhaust gas from the deep combustion zone 1 passes through the dust reduction flower hole. The plate 2-2 enters the baffled dust-reducing area 2.

There are a plurality of the baffle guide platforms 2-3, and the baffle guide platforms are downwardly inclined annular inclined platforms made of refractory and wear-resistant materials, and the inclination is greater than or equal to 45°.

The second combustion chamber shell 3 is provided with an observation hole 2-5, a combustion gas monitoring hole 2-4, a compressed air soot blowing pipe 2-8 and an inspection port 2-9, and the compressed air soot blowing pipe 2-8 is arranged in the The upper position of the baffle guide table 2-3 and the dust reduction flower orifice plate 2-2 can be regularly purged to prevent the occurrence of ash accumulation and blockage; the inspection port 2-9 is set in the middle of the ash collecting hopper 2-10 and the lower position of the dust suppression flower orifice plate 2-2.

As shown in Figures 3 and 4, the middle of the ash collecting hopper 2-10 is provided with a fire blocking grille 2-1. Located in the lower part of the deep combustion zone 1 and the baffled dust reduction zone 2, the diameter of the round or square holes on the fire-blocking grille 2-1 can be designed and adjusted according to the actual situation.

As shown in Figure 3, Figure 5 and Figure 6, the dust suppression flower orifice plate 2-2 is an annular heat-resistant punched steel plate, which is fixedly installed between the air outlet 1-5 and the inner wall of the second combustion chamber shell 3. The thickness of the orifice plate 2-2 and the aperture size of the punching holes can be designed and adjusted according to the actual situation.

As shown in Fig. 3, Fig. 7 and Fig. 8, the baffle guide table 2-3 is an annular inclined table made of refractory and wear-resistant material that slopes downward (inclination ≥ 45°), and is fixedly installed on the secondary combustion chamber. On the inner wall of the chamber shell 3, it plays the role of deflecting and guiding and reducing dust.

As shown in Figure 3 and Figure 9 , the annular gas outlet pipe 2-7 surrounds the upper shell of the secondary combustion chamber shell 3, and the high temperature exhaust gas after deflecting and dust reduction is collected through the annular gas collecting and air guiding structure, and the Introduce the exhaust gas purification system.

The working principle of the second combustion chamber treatment device of the present invention applied to the domestic waste pyrolysis furnace is as follows:

During operation, the combustible pyrolysis gas produced by the pyrolysis gasifier through pyrolysis gasification is first collected through the annular gas header and then introduced into the combustion section 1-2 in the deep combustion zone 1 through the air inlet 1-1, The tangential swirl method enters the combustion section 1-2 to increase the turbulence of the pyrolysis gas and promote the uniform mixing of the pyrolysis gas and the secondary air. The pyrolysis gas entering the combustion section 1-2 is mixed with the secondary air, because the inner diameter of the combustion section 1-2 is slightly larger than the pipe diameter of the air inlet 1-1, and the secondary air supply port 1-3 is located in the combustion section 1-2. 2. The non-equidistant arrangement is adopted from top to bottom. The closer to the air inlet, the denser the arrangement is. This air intake and air distribution method can not only avoid the excessive dilution of the pyrolysis gas concentration by the secondary air, but also ensure that the heat The pyrolysis gas is uniformly mixed with a small amount of secondary air in the upper half of the combustion section 1-2 and fully combusted to reduce exhaust emissions as much as possible. In the lower half of the combustion section 1-2, a small amount of secondary air supply ports 1-3 and burners 1-4 are also set, and the high-temperature exhaust gas generated by the thorough combustion of the pyrolysis gas enters the baffled dust reduction zone 2 through the gas outlet 1-5. , the high-temperature exhaust gas is instantly expanded and decelerated through the bell mouth outlet 1-5, which can improve the dust reduction effect and increase the residence time of the exhaust gas in the high temperature section. The high-temperature exhaust gas passes through the multi-stage dust reduction and baffle action of the fire blocking grille 2-1, the dust reduction flower orifice 2-2 and the baffle guide table 2-3 in the baffled dust reduction zone 2, effectively removing the metal dust and other Dust particles, and ensure that the high-temperature exhaust gas stays in the secondary combustion chamber for a sufficient time to fundamentally inhibit the formation of toxic and harmful secondary pollutants such as dioxins. The trachea 2-7 are collected centrally and introduced into the exhaust gas purification system.

During the operation of the secondary combustion chamber treatment device of the present invention, the automatic control system performs automatic regulation through data analysis such as the flow rate, pressure, temperature and pollutant concentration of the pyrolysis gas and high-temperature exhaust gas, so as to achieve the optimal operating condition, and the secondary combustion chamber The deep combustion and baffled dust reduction process is organically combined with the pyrolysis gasification process of the pyrolysis furnace to achieve precise control of each process; for example, when the pyrolysis gas flow rate is small and the concentration is low, the lower half of the combustion section 1-2 can be closed The secondary air supply port and burner in the upper part of the system only open the secondary air supply and burner in the upper half of the combustion section 1-2. The system has high flexibility, effectively controls the combustion conditions and exhaust emissions, and reduces the exhaust gas purification system. Handling load and saving operating costs.

Compared with the prior art, the invention has the advantages of simple and convenient system operation, strong process controllability, high pyrolysis efficiency, sufficient secondary combustion, high efficiency of deflecting and dust reduction, low pollutant concentration, small exhaust gas emission, low operation cost, etc. Advantages, it can be widely used in the field of urban domestic waste pyrolysis treatment.

The above-mentioned examples are only preferred embodiments of the present invention, and are not intended to limit the scope of implementation of the present invention. It should be pointed out that due to the limitation of written expression, and objectively there are infinite specific structures, for those of ordinary skill in the technical field to which the present invention belongs, without departing from the main idea of the present invention, some simple deductions can also be made Or replacement, should be regarded as belonging to the protection scope of the present invention.

Claims (9)

1. being applied to dual firing chamber's treatment process of domestic garbage pyrolysis furnace, which is characterized in that the treatment process includes following operation Step:

1) combustible pyrolysis's conductance that pyrolysis oven generates is entered to be located at the deep combustion area top in dual firing chamber centre, combustible pyrolysis Gas passes through deep combustion area from top to bottom, and enters deep combustion Qu Houyu Secondary Air in a manner of tangential swirl and be sufficiently mixed, fire It burns；

2) high-temperature tail gas that the burning of deep combustion area generates is come out to import from the bottom in deep combustion area and is located at deep combustion area The baffling depositing dust area of outside, and convey from lower to upper, separate unit, implementation subregion are transported each other for deep combustion area and baffling depositing dust area Row；High-temperature tail gas is discharged from baffling depositing dust area top after multistage depositing dust and baffling in baffling depositing dust area and is sent into tail gas clean-up System.

2. being applied to dual firing chamber's processing unit of domestic garbage pyrolysis furnace, which is characterized in that the device includes dual firing chamber's shell, and two It fires and is equipped with deep combustion area and baffling depositing dust area in room housing, the centre of dual firing chamber's shell is arranged in deep combustion area, rolls over Stream depositing dust area is located at the outside in deep combustion area, and deep combustion area is connected with the bottom in baffling depositing dust area；Deep combustion area Top is equipped with the air inlet tangentially accessed, and the top in baffling depositing dust area is equipped with exhaust collection and imports the ring of exhaust gas purification system Shape escape pipe；The lower part of dual firing chamber's shell is equipped with the flue-dust retainer below deep combustion area and baffling depositing dust area, dual firing chamber's shell The bottom of body is equipped with ash hole.

3. being applied to dual firing chamber's processing unit of domestic garbage pyrolysis furnace according to claim 2, which is characterized in that the depth Degree combustion zone is circular straighttube shape, and combustible pyrolysis's gas of top closure, pyrolysis oven generation imports deep combustion by air inlet In area, deep combustion area is equipped with multiple Secondary Airs supply mouth and multiple burners, and the bottom in deep combustion area is equipped with horn-like Gas outlet.

4. being applied to dual firing chamber's processing unit of domestic garbage pyrolysis furnace according to Claims 2 or 3, which is characterized in that institute The air inlet for stating deep combustion area top is equipped with pyrolysis gas monitoring holes, is equipped with gas controlling device in pyrolysis gas monitoring holes, into The bore of port is less than the internal diameter in deep combustion area.

5. being applied to dual firing chamber's processing unit of domestic garbage pyrolysis furnace according to Claims 2 or 3, which is characterized in that institute Cavity area of the baffling depositing dust area between deep combustion area and dual firing chamber's inner walls is stated, the annular on baffling depositing dust area top goes out Port is equipped with tail gas monitoring holes, and gas controlling device is equipped in tail gas monitoring holes, and the middle and lower part in deep combustion area is equipped with baffling Guide table and depositing dust flower orifice plate, baffling guide table are located above depositing dust flower orifice plate, the high-temperature tail gas warp come out from deep combustion area Depositing dust flower orifice plate enters baffling depositing dust area.

6. being applied to dual firing chamber's processing unit of domestic garbage pyrolysis furnace according to claim 5, which is characterized in that the folding It flowing guide table and is equipped with multiple, baffling guide table is the cyclic annular sloping platform that tilts down made of Fire and abrasion resistant material, gradient >= 45°。

7. being applied to dual firing chamber's processing unit of domestic garbage pyrolysis furnace according to Claims 2 or 3, which is characterized in that institute It states and peep hole, combustion gas monitoring holes, compressed air soot-blowing pipe and access hole is installed on dual firing chamber's shell.

8. being applied to dual firing chamber's processing unit of domestic garbage pyrolysis furnace according to claim 2, which is characterized in that the collection The middle part of ash bucket, which is equipped with, keeps off fiery grid.

9. being applied to dual firing chamber's processing unit of domestic garbage pyrolysis furnace according to claim 3, which is characterized in that described two Deep combustion area is arranged in non-equidistant in secondary wind supply mouth and burner from top to bottom.