Household garbage pyrolysis combustion furnace

Abstract

The utility model relates to the technical field of household garbage treatment, in particular to a household garbage pyrolysis combustion furnace. A household garbage pyrolysis combustion furnace comprises a combustion furnace body distributed in a zigzag shape, the combustion furnace body is sequentially provided with an upper combustion area, a drying pyrolysis area, a lower combustion area and a burnout area from top to bottom, a feeding system is arranged on one side of the drying pyrolysis area, a pyrolysis fire grate is arranged in the drying pyrolysis area and inclines towards the left lower portion, and the burning-out area is arranged on the other side of the drying pyrolysis area. And an incinerator grate is arranged in the lower combustion area and the burnout area, the incinerator grate is obliquely arranged towards the lower right portion, the incinerator grate and the pyrolyzing grate are staggered in the horizontal direction, an ash discharging hopper is arranged on the lower portion of the incinerator grate, and a slag discharging unit is arranged at the tail end of the burnout area. The problem that an existing small furnace is high in original pollutant concentration is solved, pyrolysis coupling combustion and staged combustion are achieved, and pollutants are reduced; the pyrolyzing grate is placed in the drying pyrolyzing area, so that the problems that combustion is difficult and the ash ignition loss is low when low-heat-value garbage is treated by an existing small furnace are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to life garbage treatment technical field especially a kind of life garbage pyrolysis combustion furnace. BACKGROUND

[0002] At present, the general treatment capacity of incinerator is 30t / d-100t / d, and when treating low-calorific-value garbage, the drying time is long and the combustion is insufficient. The grate in the incinerator is narrow and long, and the area of the side wall at the upper part of the grate is relatively large. In addition, the incinerator has the following defects:

[0003] (1) high original pollutant concentration;

[0004] (2) difficult to burn when treating low-calorific-value garbage;

[0005] (3) low ash reduction on ignition rate when treating low-calorific-value garbage;

[0006] (4) large area occupied by the grate;

[0007] (5) large heat loss, etc. SUMMARY

[0008] The utility model solves the technical problems: in order to solve the existing small furnace original pollutant concentration high, treat low-calorific-value garbage, ash reduction on ignition rate low, the problem of large area occupied by the grate and large investment, provide a kind of life garbage pyrolysis combustion furnace, and the treatment capacity is 30t / d-100t / d.

[0009] The utility model adopts the technical scheme that a kind of life garbage pyrolysis combustion furnace, including the combustion furnace body of "Z" shape distribution, the upper combustion zone, drying pyrolysis zone, lower combustion zone and burnout zone that are sequentially arranged from top to bottom in the combustion furnace body, one side of the drying pyrolysis zone is equipped with feeding system, and hot pyrolysis grate is equipped in drying pyrolysis zone, the hot pyrolysis grate is inclined to left and down, and the incinerator grate is inclined to right and down in the lower combustion zone and burnout zone, and the incinerator grate and hot pyrolysis grate are staggered in horizontal direction, and the lower part of the incinerator grate is equipped with ash bucket, and the end of the burnout zone is equipped with slagging unit.

[0010] Further, the upper combustion zone includes upper combustion zone front arch and upper combustion zone rear arch, the upper combustion zone front arch is composed of the first vertical section and the first inclined section connected together, the included angle α between the first vertical section and the first inclined section is 90°-175°, the upper combustion zone rear arch is composed of the second vertical section and the second inclined section connected together, and the included angle between the second vertical section and the second inclined section is equal to α.

[0011] Further, the first vertical section and the second vertical section are connected with air pipe.

[0012] Further, the dry pyrolysis zone comprises a dry pyrolysis zone front arch and a dry pyrolysis zone rear arch, the dry pyrolysis zone front arch is composed of a third vertical section and a third inclined section connected together, the dry pyrolysis zone rear arch is composed of a fourth vertical section and a fourth inclined section connected together, and the inclination angle of the fourth inclined section is consistent with the inclination angle of the pyrolysis furnace row.

[0013] Further, the lower combustion zone comprises a lower combustion zone front arch and a lower combustion zone rear arch, the lower combustion zone front arch is a vertical section, the included angle β between the vertical section and the third inclined section is 95°-185°, and the lower combustion zone rear arch is also a vertical section.

[0014] Further, the burnout zone furnace arch is arranged to be inclined to the lower right, the inclination angle γ of the burnout zone furnace arch is 5°-85°, and the inclination angle is consistent with the inclination angle of the incineration furnace row.

[0015] Further, the inner wall of the slagging unit is provided with a refractory material layer.

[0016] Further, the bottom end of the ash bucket is provided with an ash discharge port, and the sidewall of the ash bucket is provided with an observation window and an air inlet.

[0017] The beneficial effects of the present application are as follows:

[0018] The present application solves the problem of high original pollutant concentration of the existing small furnace by setting the dry pyrolysis zone, the burnout zone, the upper combustion zone and the lower combustion zone, realizes pyrolysis coupling combustion and staged combustion, and reduces the generation of pollutants.

[0019] (2) The present application solves the problems of difficult combustion and low ash ignition loss rate of the existing small furnace when treating low-calorific-value garbage by placing the pyrolysis furnace row in the dry pyrolysis zone, and realizes efficient and stable pyrolysis combustion of county and township low-calorific-value garbage.

[0020] (3) The present application sets the combustion furnace body in a "Z" shape, solves the problem of guiding high-temperature flue gas to dry pyrolysis garbage, and achieves pyrolysis coupling combustion.

[0021] (4) The present application solves the problem of narrow and long land occupation of the novel small furnace by arranging the two layers of furnace rows in an up-and-down staggered manner, and achieves the purpose of reducing cost. BRIEF DESCRIPTION OF DRAWINGS

[0022] The present application will be further described below in combination with the drawings and examples.

[0023] Figure 1 The present application is a structural schematic diagram.

[0024] In the diagram: 100. Combustion furnace body; 1. Upper combustion zone; 11. Front arch of upper combustion zone; 111. First vertical section; 112. First inclined section; 12. Rear arch of upper combustion zone; 121. Second vertical section; 122. Second inclined section; 2. Drying pyrolysis zone; 21. Front arch of drying pyrolysis zone; 211. Third vertical section; 212. Third inclined section; 22. Rear arch of drying pyrolysis zone; 221. Fourth vertical section; 222. Fourth inclined section; 3. Lower combustion zone; 31. Front arch of lower combustion zone; 32. Rear arch of lower combustion zone; 4. Combustion zone; 5. Feeding system; 6. Pyrolysis grate; 7. Incineration grate; 8. Lower ash hopper; 81. Ash discharge port; 82. Observation window; 83. Air inlet; 9. Slag discharge unit; 91. Refractory material layer; 10. Air duct. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0026] like Figure 1 As shown, a municipal solid waste pyrolysis incinerator includes a combustion furnace body 100 arranged in a zigzag pattern. The combustion furnace body 100 comprises, from top to bottom, an upper combustion zone 1, a drying pyrolysis zone 2, a lower combustion zone 3, and a burnout zone 4. A feeding system 5 is provided on one side of the drying pyrolysis zone 2. A pyrolysis grate 6 is provided within the drying pyrolysis zone 2, inclined downwards to the left. An incineration grate 7 is provided within the lower combustion zone 3 and burnout zone 4, inclined downwards to the right. The incineration grate 7 and the pyrolysis grate 6 are horizontally staggered. A lower ash hopper 8 is provided below the incineration grate 7. A slag discharge unit 9 is provided at the end of the burnout zone 4. A refractory material layer 91 is provided on the inner wall of the slag discharge unit 9. An ash discharge port 81 is provided at the bottom of the lower ash hopper 8, and an observation window 82 and an air inlet 83 are provided on the side wall of the lower ash hopper 8.

[0027] The upper combustion zone 1 includes a front arch 11 and a rear arch 12. The front arch 11 is composed of a first vertical section 111 and a first inclined section 112 connected together, with an angle α between the first vertical section 111 and the first inclined section 112 ranging from 90° to 175°. The rear arch 12 is composed of a second vertical section 121 and a second inclined section 122 connected together, with an angle α between the second vertical section 121 and the second inclined section 122 equal to α. The upper combustion zone 1 is a secondary combustion zone, with air ducts 10 connected to both the first vertical section 111 and the second vertical section 121, forming a secondary air system.

[0028] The dry pyrolysis zone 2 comprises a dry pyrolysis zone front arch 21 and a dry pyrolysis zone rear arch 22, the dry pyrolysis zone front arch 21 is composed of a third vertical section 211 and a third inclined section 212 connected together, the dry pyrolysis zone rear arch 22 is composed of a fourth vertical section 221 and a fourth inclined section 222 connected together, and the inclination angle of the fourth inclined section 222 is consistent with the inclination angle of the pyrolysis furnace row 6.

[0029] The lower combustion zone 3 comprises a lower combustion zone front arch 31 and a lower combustion zone rear arch 32, the lower combustion zone front arch 31 is a vertical section, and the included angle β between the vertical section and the third inclined section 212 is 95°-185°, and the lower combustion zone rear arch 32 is also a vertical section.

[0030] The burnout zone 4 furnace arch is arranged to be inclined to the right and down, and the inclination angle γ of the burnout zone 4 furnace arch is 5°-85°, which is consistent with the inclination angle of the incineration furnace row 7.

[0031] Specific working process: The household garbage is sent into the combustion furnace body 100 by the feeding system 5, the garbage is radiated by the high-temperature flue gas from the lower combustion zone 3 in the pyrolysis furnace row 6, the heated garbage is gradually dried and pyrolyzed and gasified in the dry pyrolysis zone 2 in an oxygen-deficient state, the solid-phase product after pyrolysis is sent into the lower combustion zone 3, and the gas-phase product enters the upper combustion zone 2, i.e. the secondary combustion zone; the solid-phase product after pyrolysis is combusted and burned out on the incineration furnace row 7, the required air is sent in through the air inlet 83 of the lower ash bucket 8, and the ash after burning out is sent into the slag discharging unit 9; the gas-phase product after pyrolysis enters the secondary combustion zone with the flue gas for gas-phase combustion, and the required air is sent in through the secondary air system.

[0032] The household garbage pyrolysis combustion furnace of the embodiment has two combustion zones, realizes staged combustion, and couples the pyrolysis process, reduces the original gas-phase pollutant emission, and reduces the difficulty of subsequent flue gas treatment, especially the control of nitrogen oxides. The up-and-down staggered arrangement of the incineration furnace row 7 and the pyrolysis furnace row 6 and the cooperation of the hearths guide the high-temperature flue gas of the combustion zone to the dry pyrolysis zone 2, strengthen the drying process, and realize pyrolysis, solve the problem of difficult combustion of low-calorific-value garbage, and then the garbage is combusted and burned out on the incineration furnace row 7, which can reduce the loss on ignition, realize the stable treatment of county and township garbage at high temperature, and save the land occupation, solve the problem of long and narrow traditional small-scale incinerators, and reduce the production cost.

[0033] Based on the above ideal embodiment according to the utility model, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the utility model. The technical scope of the utility model is not limited to the content in the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A municipal solid waste pyrolysis incinerator, characterized in that: The application relates to a combustion furnace body (100) arranged in a zigzag shape, which comprises an upper combustion zone (1), a drying and pyrolysis zone (2), a lower combustion zone (3) and a burnout zone (4) arranged in sequence from top to bottom, one side of the drying and pyrolysis zone (2) is provided with a feeding system (5), the drying and pyrolysis zone (2) is provided with a pyrolysis grate (6), the pyrolysis grate (6) is arranged to be inclined to the left and downwards, the lower combustion zone (3) and the burnout zone (4) are provided with a burning grate (7), the burning grate (7) is arranged to be inclined to the right and downwards, the burning grate (7) and the pyrolysis grate (6) are staggered in the horizontal direction, the lower part of the burning grate (7) is provided with a lower ash hopper (8), and the end of the burnout zone (4) is provided with a slag discharging unit (9).

2. The household waste pyrolysis combustion furnace according to claim 1, characterized in that: The upper combustion zone (1) comprises an upper combustion zone front arch (11) and an upper combustion zone rear arch (12), the upper combustion zone front arch (11) is composed of a first vertical section (111) and a first inclined section (112) connected together, the included angle alpha between the first vertical section (111) and the first inclined section (112) is 90-175 degrees, the upper combustion zone rear arch (12) is composed of a second vertical section (121) and a second inclined section (122) connected together, and the included angle between the second vertical section (121) and the second inclined section (122) is equal to alpha.

3. The household waste pyrolysis combustion furnace according to claim 2, characterized in that: The first vertical section (111) and the second vertical section (121) are connected with air pipes (10).

4. The household waste pyrolysis combustion furnace according to claim 1, characterized in that: The drying and pyrolysis zone (2) comprises a drying and pyrolysis zone front arch (21) and a drying and pyrolysis zone rear arch (22), the drying and pyrolysis zone front arch (21) is composed of a third vertical section (211) and a third inclined section (212) connected together, the drying and pyrolysis zone rear arch (22) is composed of a fourth vertical section (221) and a fourth inclined section (222) connected together, and the inclination angle of the fourth inclined section (222) is consistent with the inclination angle of the pyrolysis grate (6).

5. The household waste pyrolysis combustion furnace according to claim 4, characterized in that: The lower combustion zone (3) comprises a lower combustion zone front arch (31) and a lower combustion zone rear arch (32), the lower combustion zone front arch (31) is a vertical section, the included angle beta between the vertical section and the third inclined section (212) is 95-185 degrees, and the lower combustion zone rear arch (32) is also a vertical section.

6. The household waste pyrolysis combustion furnace according to claim 1, characterized in that: The burnout zone (4) is arranged to be inclined to the right and downwards, the inclination angle gamma of the burnout zone (4) is 5-85 degrees, and the inclination angle is consistent with that of the burning grate (7).

7. The household waste pyrolysis combustion furnace according to claim 1, characterized in that: The inner wall of the slag discharging unit (9) is provided with a refractory material layer (91).

8. The household waste pyrolysis combustion furnace according to claim 1, characterized in that: The bottom end of the lower ash hopper (8) is provided with an ash discharging port (81), the side wall of the lower ash hopper (8) is provided with an observation window (82) and an air inlet (83).

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