CN214094495U - Garbage pyrolysis gasification device based on grate furnace - Google Patents
Garbage pyrolysis gasification device based on grate furnace Download PDFInfo
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- CN214094495U CN214094495U CN202120021525.9U CN202120021525U CN214094495U CN 214094495 U CN214094495 U CN 214094495U CN 202120021525 U CN202120021525 U CN 202120021525U CN 214094495 U CN214094495 U CN 214094495U
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- pyrolysis gasification
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The utility model belongs to the field of garbage heat treatment, and relates to a garbage pyrolysis gasification device based on a grate furnace, which comprises a feeding device, a pyrolysis gasification grate, a combustion grate and an air supply system which are arranged in sequence; the pyrolysis gasification furnace grate and the combustion furnace grate are arranged in the furnace hearth, the air supply device comprises an internal air supply device and a first external air supply device, and the internal air supply device is used for conveying hot air of the furnace hearth to the pyrolysis gasification furnace grate; and an air outlet of the first external air supply device is communicated to the combustion grate. The utility model discloses can realize rubbish earlier pyrolysis gasification under anaerobic condition, complete combustion under the oxygen-enriched state again, complete combustion provides the heat source for pyrolysis gasification, and combustible gas realizes abundant burning in the furnace export. The anaerobic combustion can inhibit the generation of harmful substances such as dioxin and the like to a great extent; anaerobic combustion is also beneficial to reducing the combustion air supply quantity and the flue gas quantity, thereby improving the heat energy utilization efficiency.
Description
Technical Field
The utility model belongs to rubbish thermal treatment field relates to a rubbish pyrolysis gasification equipment based on grate furnace.
Background
Along with the rapid development of national economy and the acceleration of urbanization process, the living standard of people is increasingly improved, and the generation amount of municipal domestic waste is larger and larger; the defects of the landfill treatment mode and the contradiction generated are increasingly revealed, high-concentration percolate and a large amount of harmful gas generated after landfill cause serious environmental pollution, and simultaneously, a large amount of land resources are required to be occupied. The incineration treatment becomes a main garbage treatment mode, which not only can get rid of the dependence on a large amount of land resources, but also can meet the dual requirements of environmental protection and resource utilization, and also conforms to the national policies of domestic garbage reduction, harmlessness and resource utilization.
In recent years, the waste incineration industry in China has entered a high-speed development period under the encouragement of national industrial policies. At present, the direct incineration treatment and waste heat utilization technology of the grate furnace is mainly applied in China, and the harmless treatment and resource utilization of the household garbage are effectively realized. In order to reach the emission standard, the flue gas generated by the waste incineration must be reliably purified, and the generated waste gas such as fly ash, leachate and the like must be treated before being buried or discharged.
How to reduce the content of pollutants in the flue gas generated by burning the garbage and improve the utilization efficiency of combustion heat energy so as to further improve the levels of harmless treatment and resource utilization of the garbage and promote the sustainable and healthy development of the industry is a research focus of the domestic and foreign industries at present, wherein the pyrolysis gasification technology is a hotspot of research and has good application prospect.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a garbage pyrolysis gasification equipment based on grate furnace to realize innocent treatment and resource utilization to domestic waste.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a garbage pyrolysis gasification device based on a grate furnace comprises a feeding device, a pyrolysis gasification grate, a combustion grate and an air supply system which are sequentially arranged; the pyrolysis gasification furnace grate and the combustion furnace grate are arranged in the furnace hearth, the air supply device comprises an internal air supply device and a first external air supply device, and the internal air supply device is used for conveying hot air of the furnace hearth to the pyrolysis gasification furnace grate; the air outlet of the first external air supply device is communicated to the combustion grate, and the air supply device further comprises a second external air supply device arranged at the smoke outlet of the hearth.
Optionally, a partition wall is arranged in the hearth, the position of the partition wall is matched with the joint of the pyrolysis gasification grate and the combustion grate, and a blanking channel convenient for blanking to the combustion grate is formed between the partition wall and the pyrolysis gasification grate.
Optionally, the pyrolysis gasification grate includes a first grate segment and at least one first ash bucket disposed below the first grate segment.
Optionally, the internal air supply device is communicated to the pyrolysis gasification grate through a first air supply pipeline and a second air supply pipeline, wherein the first air supply pipeline is communicated to the first ash hopper, and the second air supply pipeline is communicated to the position, matched with the pyrolysis gasification device, outside the hearth.
Optionally, the feeding device includes a hopper, a chute, a feeding platform and an infiltration liquid hopper, the chute is arranged below the hopper, the chute is communicated to the feeding platform, the infiltration liquid hopper is arranged below the feeding platform, and a branch communicated to the infiltration liquid hopper is arranged on the first air supply pipeline.
Optionally, the pyrolysis gasification grate adopts a forward-pushing grate structure, the combustion grate adopts a backward-pushing structure, and the upward inclination angle of the pyrolysis gasification grate is smaller than the downward inclination angle of the combustion grate.
Optionally, the upward inclination angle of the pyrolysis gasification grate is 5-15 degrees; the downward inclined angle of the combustion grate is 20-30 degrees.
Optionally, the discharge port of the pyrolysis gasification grate is connected with the feed port of the combustion grate through a vertical fall structure.
Optionally, the internal air supply device includes a hot air blower, and the hot air blower is arranged at a position outside the hearth, which is matched with the combustion grate.
Optionally, the combustion grate includes a second grate segment and a second ash bucket disposed below the second grate segment, a main pipe of the first external air supply device is communicated to the second ash bucket, a second branch is disposed on the main pipe, and the second branch is communicated to the hot air blower.
The beneficial effects of the utility model reside in that:
1. the utility model discloses utilize pyrolysis gasification grate to make rubbish realize drying and pyrolysis gasification under anaerobic condition, the combustible synthetic gas that pyrolysis gasification generated realizes the complete combustion at the furnace exit region, and this can effectual reduction harmful substance's such as dioxin generation reduces the content of harmful substance in the burning flue gas, has improved rubbish innocent treatment level.
2. The garbage drying device utilizes hot flue gas extracted from a combustion area of the combustion grate to heat and dry garbage of the feeding platform, and heats the garbage in the row of the pyrolysis gasification furnace, so that the garbage is promoted to be pyrolyzed and gasified, the consumption of external energy is reduced, and the energy-saving effect is good.
3. The utility model discloses the hot flue gas that utilizes extraction burning grate combustion area arranges the rubbish that the pyrolysis gasifier was arranged heats, is favorable to controlling and reducing rubbish heat treatment process combustion air supply volume, and then also reduces total burning flue gas volume, is favorable to improving heat energy utilization efficiency, is favorable to reducing the construction cost and the running cost that rubbish heat treatment process technology was equipped.
4. The utility model discloses utilize the division wall to separate pyrolysis gasification grate and burning grate relatively, the material passageway of lower extreme is blockked up by the operation rubbish and is separated, can prevent the oxygen boosting flue gas on the burning grate to get into pyrolysis gasification grate region, is favorable to controlling pyrolysis gasification grate combustion air volume, does benefit to the pyrolysis gasification that realizes anaerobic environment promotion rubbish. The garbage materials on the pyrolysis gasification grate can be heated by utilizing the radiant heat of the partition wall, so that the drying and the pyrolysis gasification are promoted.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and/or combinations particularly pointed out in the appended claims.
Drawings
For the purposes of promoting a better understanding of the objects, features and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
fig. 1 is a schematic view of the overall structure of the present invention.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in any way limiting the scope of the invention; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc., indicating directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limiting the present invention, and those skilled in the art can understand the specific meanings of the terms according to specific situations.
Referring to FIG. 1, the reference numbers in the drawings denote: the device comprises a feeding device 1, a pyrolysis and gasification grate 2, a combustion grate 3, a hearth 4, a partition wall 5, an internal air supply device 6, a first external air supply device 7, a second external air supply device 8, a drop structure 9, a slag drop opening 10, a hopper 101, a chute 102, a feeding platform 103, an infiltration liquid hopper 104, a first grate segment 201, a first ash hopper 202, a discharge opening 203, a second grate segment 301, a second ash hopper 302, a feed opening 303, a first furnace chamber 401, a second furnace chamber 402, a flue gas outlet 403, a hot air fan 601, a first air supply pipeline 602, a second air supply pipeline 603, a first branch 604, a main pipeline 701 and a second branch 702.
The utility model relates to a rubbish pyrolysis gasification equipment based on grate furnace, including feed arrangement 1, pyrolysis gasification grate 2, burning grate 3, furnace 4, division wall 5 and inside air feed device 6, first outside air feed device 7, the outside air feed device 8 of second.
The discharge hole of the feeding device 1 is connected with the pyrolysis gasification grate 2, the combustion grate 3 is positioned below the pyrolysis gasification grate 2, and the tail material hole of the pyrolysis gasification grate 2 is connected with the feed hole of the combustion grate 3 through a vertical fall.
The air supply device comprises an internal air supply device 6, a first external air supply device 7 and a second external air supply device 8, the internal air supply device 6 comprises a hot air fan 601 and a pipeline, an air inlet of the hot air fan 601 is connected with a rear arch of a second furnace chamber 402 of the combustion grate 3, and an air outlet of the hot air fan 601 is connected with the pyrolysis gasification grate 2; the air outlet of the main pipeline 701 is connected with the second ash bucket 302 below the combustion grate 3 through an air supply pipe.
In the working process of the waste pyrolysis gasification device based on the grate furnace, the main pipeline 701 of the first external air supply device 7 sends air into the second ash bucket 302 at the lower part of the grate of the combustion grate furnace 3 through the blast pipe, the air enters the hearth from the grate, so that the second furnace chamber 402 of the combustion grate 3 is in an oxygen-enriched state, the waste can be ensured to be fully combusted and burnt out, high-temperature flue gas in the combustion grate 3 is sent into the pyrolysis gasification grate 2 through the hot air fan 601, one function of the high-temperature flue gas entering the pyrolysis gasification grate 2 is to provide a heat source for waste pyrolysis gasification, the other function is to adjust gas components in the pyrolysis gasification grate 2, the first furnace chamber 401 of the pyrolysis gasification grate 2 is in an anaerobic state, and the pyrolysis gasification condition is formed. The second branch 702 of the first external air supply device 7 supplies air to the hot air blower 601 of the internal air supply device 6 through the blast pipe, and is used for adjusting the smoke parameters of the internal air supply during operation. The burned-out slag is discharged from the slag drop opening 10.
In this embodiment, the waste pyrolysis gasification device based on the grate furnace utilizes the pyrolysis gasification grate to pyrolyze and gasify the waste to generate combustible gas, the combustible gas in the first furnace chamber 401 is mixed with the high-temperature flue gas from the second furnace chamber 402 in the area of the flue gas outlet 403 of the furnace chamber, and complete combustion is achieved under the auxiliary condition of the second external air supply device 8. The garbage is pyrolyzed and gasified under the anaerobic condition and the lower temperature condition, so that the generation of harmful substances such as dioxin and the like can be effectively inhibited, and the content of the harmful substances in combustion flue gas is reduced; and the high-temperature flue gas combusted by the combustion grate is used as a heat source for pyrolysis and gasification of the garbage, so that the dependence on an external heat source can be reduced, the utilization rate of garbage energy is further improved, and the energy-saving effect is good.
As an improvement to this embodiment, the second external air supply device 8 is further connected to the air inlets of the front and rear walls in the area of the flue gas outlet 403 of the furnace through the air supply pipe, so that the air supply is beneficial to promoting the combustible gas and the combustion flue gas from the first furnace chamber 401 and the second furnace chamber 402 to be fully mixed and to realize complete combustion during operation, and reducing the content of harmful substances such as CO in the combustion flue gas.
As an improvement to the embodiment, an air outlet of the hot air blower 601 is connected with the pyrolysis and gasification grate 2 through a first air supply pipeline 602 and a second air supply pipeline 603, an air outlet of the first air supply pipeline 602 is arranged on the first ash bucket 202 at the lower part of the pyrolysis and gasification grate 2, and an air outlet of the second air supply pipeline 603 is arranged in the middle of a front arch of the first cavity 401 of the pyrolysis and gasification grate 2; the two air supplies can provide heat to the furnace simultaneously under the condition of ensuring that the first furnace cavity 401 is in an anaerobic state during operation.
As an improvement to this embodiment, the air outlet of the hot air blower 601 is connected to the percolate bucket 104 below the feeding platform 103 through the first branch 604, and during operation, the high-temperature combustion flue gas supplied by this way can promote the garbage to be dried in advance on the feeding platform 103.
As a modification of this embodiment, the pyrolysis gasification grate 2 and the combustion grate 3 are inclined. The first fire grate segment 201 of the pyrolysis gasification fire grate 2 adopts a forward-pushing structure form, a 10-degree small inclination angle theta 1 is arranged between the fire grate surface and the horizontal plane upwards (certainly, the included angle theta 1 can also be other values within the range of 5-15 degrees in different embodiments), the fire grate is obliquely arranged in operation and the forward-pushing motion of the fire grate segment is added, so that the garbage can be overturned and pyrolyzed and gasified. The second fire grate segment 301 of the combustion fire grate 3 adopts a reverse pushing structure form, a 25-degree large inclination angle theta 2 is formed downwards between the fire grate surface and the horizontal plane (certainly, the included angle theta 2 can also be other values within the range of 20-30 degrees in different embodiments), the fire grate is obliquely arranged in operation and the reverse pushing motion of the fire grate segment is added, so that the garbage can be overturned and conveyed, and the garbage can be combusted and burnt out.
As an improvement to this embodiment, the tail discharge port 203 of the pyrolysis gasification grate 2 and the feed port 303 of the combustion furnace grate 3 are connected by a vertical fall structure 9, and the height h1 of the fall structure 9 is 1000mm (of course, the height h1 may be other values within the range of 500-1500 mm in different embodiments). The middle of a hearth above a tail discharge port 203 of the pyrolysis gasification grate 2 is provided with a partition wall 5, reasonable circulation spaces are arranged above and below the partition wall 5, and the distance h2 between the lower part and the tail of the pyrolysis gasification grate is 800mm (of course, the fall height h2 can also be other values within the range of 400-1200 mm in different embodiments). In operation, the space below the partition wall 5 can be used for allowing materials in operation to pass through the discharge port 203 at the tail part of the pyrolysis gasification grate 2 and fall to the feed port 303 of the combustion furnace grate 3, and meanwhile, the first furnace chamber 401 and the second furnace chamber 402 can be relatively isolated, so that the movement of combustion smoke in the space is reduced, and the first furnace chamber 401 is ensured to be in a pyrolysis gasification condition; the space above the partition wall 5 can be used for the high-temperature flue gas which is burnt by the garbage in the running combustion furnace 3 to flow into the flue gas outlet 403 of the hearth; after being heated, the separation wall 5 can generate radiant heat to the garbage on the first fire grate segment 201 to promote the pyrolysis and gasification of the garbage.
As an improvement to the present embodiment, the feeding device 1 includes a hopper 101, a feeding chute 102 connected to a discharge port of the hopper 101, a feeding platform 103 disposed at a discharge port of the feeding chute 102, and a percolate bucket 104 disposed below the feeding platform 103; the improvement enables the garbage to form a material column in the blanking chute 102, keeps the furnace discharge 2 of the pyrolysis gasification furnace isolated from the outside, and is beneficial to forming high-temperature anaerobic conditions required by garbage pyrolysis gasification.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a rubbish pyrolysis gasification equipment based on grate furnace which characterized in that: comprises a feeding device, a pyrolysis gasification grate, a combustion grate and an air supply system which are arranged in sequence; the pyrolysis gasification furnace grate and the combustion furnace grate are arranged in the furnace hearth, the air supply device comprises an internal air supply device and a first external air supply device, and the internal air supply device is used for conveying hot air of the furnace hearth to the pyrolysis gasification furnace grate; an air outlet of the first external air supply device is communicated to the combustion grate; the air supply device also comprises a second external air supply device arranged at the smoke outlet of the hearth.
2. The grate-based pyrolysis gasification unit for waste as claimed in claim 1, wherein: the hearth is internally provided with a separation wall, the arrangement position of the separation wall is matched with the joint of the pyrolysis gasification grate and the combustion grate, and a blanking channel which is convenient for blanking to the combustion grate is formed between the separation wall and the pyrolysis gasification grate.
3. The grate-based pyrolysis gasification unit for waste as claimed in claim 1, wherein: the pyrolysis gasification grate comprises a first grate segment and at least one first ash bucket arranged below the first grate segment.
4. The grate-based pyrolysis gasification unit for refuse according to claim 3, characterized in that: the internal air supply device is communicated to the pyrolysis gasification grate through a first air supply pipeline and a second air supply pipeline, wherein the first air supply pipeline is communicated to a first ash hopper, and the second air supply pipeline is communicated to the position, matched with the pyrolysis gasification device, of the outer side of the hearth.
5. The grate-based pyrolysis gasification unit for refuse according to claim 4, characterized in that: the feeding device comprises a hopper, a chute, a feeding platform and an infiltration liquid hopper, wherein the chute is arranged below the hopper and communicated to the feeding platform, the infiltration liquid hopper is arranged below the feeding platform, and a branch communicated to the infiltration liquid hopper is arranged on the first air supply pipeline.
6. The grate-based pyrolysis gasification unit for waste as claimed in claim 1, wherein: the pyrolysis gasification grate adopts a forward-pushing grate structure, the combustion grate adopts a backward-pushing structure, and the upward inclination angle of the pyrolysis gasification grate is smaller than the downward inclination angle of the combustion grate.
7. The grate-based pyrolysis gasification unit for refuse according to claim 6, characterized in that: the upward inclination angle of the pyrolysis gasification fire grate is 5-15 degrees; the downward inclined angle of the combustion grate is 20-30 degrees.
8. The grate-based pyrolysis gasification unit for waste as claimed in claim 1, wherein: the discharge port of the pyrolysis gasification grate is connected with the feed port of the combustion grate through a vertical fall structure.
9. The grate-based pyrolysis gasification unit for waste as claimed in claim 1, wherein: the internal air supply device comprises a hot air fan, and the hot air fan is arranged at the position, matched with the combustion grate, of the outer side of the hearth.
10. The grate-based pyrolysis gasification unit for refuse according to claim 9, characterized in that: the combustion grate comprises a second grate segment and a second ash bucket arranged below the second grate segment, a main pipeline of the first external air supply device is communicated to the second ash bucket, a second branch is arranged on the main pipeline, and the second branch is communicated to the hot air fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120021525.9U CN214094495U (en) | 2021-01-04 | 2021-01-04 | Garbage pyrolysis gasification device based on grate furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120021525.9U CN214094495U (en) | 2021-01-04 | 2021-01-04 | Garbage pyrolysis gasification device based on grate furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214094495U true CN214094495U (en) | 2021-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120021525.9U Active CN214094495U (en) | 2021-01-04 | 2021-01-04 | Garbage pyrolysis gasification device based on grate furnace |
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| CN (1) | CN214094495U (en) |
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2021
- 2021-01-04 CN CN202120021525.9U patent/CN214094495U/en active Active
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