CN210398933U - Waste incineration device combining oxygen-enriched combustion with fly ash recycling - Google Patents
Waste incineration device combining oxygen-enriched combustion with fly ash recycling Download PDFInfo
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- CN210398933U CN210398933U CN201920574610.0U CN201920574610U CN210398933U CN 210398933 U CN210398933 U CN 210398933U CN 201920574610 U CN201920574610 U CN 201920574610U CN 210398933 U CN210398933 U CN 210398933U
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- incinerator
- fly ash
- oxygen
- primary air
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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
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Abstract
The utility model provides an oxygen boosting burning combines waste incineration device of flying dust recirculation, include: an incinerator configured to incinerate the garbage to generate flue gas; a primary air duct in communication with a bottom of the incinerator configured to provide primary air to the incinerator; an oxygen supply apparatus in communication with the primary air duct configured to supply oxygen to the incinerator; a fly ash collection device configured to collect fly ash in the flue gas; a fly ash recycling device configured to send the collected fly ash to the incinerator. According to the utility model provides an oxygen boosting burning combines waste incineration device of flying dust recycling, through providing the oxygen boosting environment, promotes going on of combustion process, promotes the burn-off of low heat value rubbish, realizes rubbish minimizing, and through flying dust recycling, it condenses to the large granule to make the flying dust melting, reduces the production of flying dust volume simultaneously to reduce the expense that the landfill flying dust produced, bring economic benefits for the waste incineration power generation project.
Description
Technical Field
The utility model relates to an burn the electricity generation field, particularly relate to a waste incineration device of oxygen boosting burning combination flying dust recycling.
Background
The traditional garbage incineration process adopts air as an oxidant, and when the water content of garbage is higher and the calorific value is lower, the garbage is blown and dried by excessive primary air. Excessive primary air can lead to the increase of the amount of fly ash in flue gas, and simultaneously, because the combustion area temperature is higher, the primary air belongs to cold air, and the increase amount of wind can cause the rubbish to burn out the difficulty, and the hot ignition loss rate of end sediment is higher, is unfavorable for the minimizing of rubbish, and the fly ash of msw incineration power plant belongs to dangerous discarded object, needs to bury, and the fly ash volume will lead to the on-the-spot landfill expense straight-line of project to rise greatly, influences the economic operation of msw incineration power plant.
Therefore, there is a need for a new waste incineration device to solve the above problems.
SUMMERY OF THE UTILITY MODEL
In the summary section a series of concepts in a simplified form is introduced, which will be described in further detail in the detailed description section. The inventive content does not imply any attempt to define the essential features and essential features of the claimed solution, nor is it implied to be intended to define the scope of the claimed solution.
The utility model provides an oxygen boosting burning combines waste incineration device of flying dust recirculation, include:
an incinerator configured to incinerate the garbage to generate flue gas;
a primary air duct in communication with a bottom of the incinerator configured to provide primary air to the incinerator;
an oxygen supply apparatus in communication with the primary air duct configured to supply oxygen to the incinerator;
a fly ash collection device configured to collect fly ash in the flue gas;
a fly ash recycling device configured to send the collected fly ash to the incinerator.
Further, the oxygen supply apparatus includes an air separation apparatus or a liquid oxygen apparatus.
Further, the fly ash collecting device comprises a dust removing device and a waste heat boiler.
Further, the bottom of the incinerator is provided with a plurality of ash hoppers, and the primary air enters the incinerator through the ash hoppers.
Further, oxygen generated by the oxygen supply apparatus enters the incinerator through a part of the ash hoppers.
Further, the bottom of the incinerator is provided with five sections of ash hoppers, wherein primary air entering from the first section of ash hopper, the second section of ash hopper and the fifth section of ash hopper is only air, and the primary air entering from the third section of ash hopper and the fourth section of ash hopper comprises oxygen provided by the oxygen supply equipment.
Further, the waste incineration device further comprises: the garbage feeding device is connected with the fly ash circulating device and is configured to send the garbage and the fly ash to the incinerator.
Further, the fly ash circulation equipment comprises a screw conveyor and a pneumatic conveying pipeline.
According to the utility model provides an oxygen boosting burning combines waste incineration device of flying dust recycling, through oxygen supply equipment and the oxygen suppliment of a blast pipe way intercommunication in to the incinerator, the oxygen boosting environment is provided, and then improve combustion temperature, promote going on of combustion process, promote the burn-off of low calorific value rubbish, realize the rubbish minimizing, fly ash in the flue gas of collecting equipment collection of fly ash through fly ash circulating equipment is sent to in the incinerator and is carried out the fly ash recycling simultaneously, make the fly ash melting condense to the large granule, reduce the production of fly ash volume, thereby reduce the expense that the landfill fly ash produced, bring certain economic benefits for the msw incineration power generation project.
Drawings
The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions of the invention, which are used to explain the principles and devices of the invention. In the drawings, there is shown in the drawings,
fig. 1 is a schematic view of a waste incineration device combining oxygen-enriched combustion and fly ash recycling according to the present invention.
Reference numerals
1. Incinerator 2, primary air pipeline
3. Oxygen supply equipment 4 and garbage feeding equipment
5. Exhaust-heat boiler 6, flue gas purification equipment
7. Dust removal equipment 8 and screw conveyor
9. Pneumatic conveying pipeline 10 and chimney
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.
In order to fully understand the present invention, detailed steps will be provided in the following description in order to explain a waste incineration apparatus of oxygen-enriched combustion combined with fly ash recycling proposed by the present invention. It is apparent that the practice of the invention is not limited to the specific details known to those skilled in the art. The preferred embodiments of the present invention are described in detail below, however, other embodiments of the present invention are possible in addition to these detailed descriptions.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
Adopt the air as a wind among the prior art, excessive wind leads to flying dust volume increase, rubbish burn out difficulty scheduling problem in the flue gas, the utility model provides an oxygen boosting burning combines waste incineration device of flying dust recirculation, as shown in fig. 1, include:
an incinerator 1, the incinerator 1 configured to incinerate garbage to produce flue gas;
a primary air duct 2, the primary air duct 2 communicating with the bottom of the incinerator 1 and configured to supply primary air to the incinerator 1;
an oxygen supply device 3, the oxygen supply device 3 being in communication with the primary air duct 2 and configured to supply oxygen to the incinerator 1;
a fly ash collection device configured to collect fly ash in the flue gas;
a fly ash circulating device configured to send the collected fly ash to the incinerator 1.
Exemplarily, the incinerator 1 is configured to incinerate waste to produce flue gas. Illustratively, the incinerator 1 includes at least a feed port, a grate for waste incineration located in a furnace chamber, an ash bucket as a primary air inlet located at a lower portion of the incineration grate, a secondary air inlet located at an incinerator throat, and a slag discharge port. In addition, the incinerator 1 further comprises a flue which is positioned above the incinerator throat and communicated with the incinerator throat and used for discharging flue gas generated by incinerating garbage.
Furthermore, the domestic garbage fed into the incinerator 1 from the feeding port is combusted on the fire grate to generate high-temperature flue gas, the fire grate is arranged obliquely, and the incinerated domestic garbage moves from a high position to a low position on the fire grate and is discharged through the slag discharging port.
Illustratively, the bottom of the incinerator 1 is provided with a plurality of ash hoppers through which the primary air enters the incinerator 1, and the oxygen generated by the oxygen supply device 3 enters the incinerator 1 through a part of the ash hoppers. In one embodiment, the bottom of the incinerator 1 is provided with five ash hoppers, and specifically, the bottom is divided into a first section ash hopper, a second section ash hopper, a third section ash hopper, a fourth section ash hopper and a fifth section ash hopper in sequence along the direction from the feeding port to the slag discharging port. The primary air entering from the first section of ash bucket, the second section of ash bucket and the fifth section of ash bucket is only air, and the primary air entering from the third section of ash bucket and the fourth section of ash bucket also comprises oxygen provided by the oxygen supply equipment 3.
The oxygen provided by the oxygen supply equipment 3 is mixed with the air of the third section ash bucket and the fourth section ash bucket as primary air mixed gas and is sent into the incinerator 1 as an oxidant for garbage combustion, so that the oxygen concentration of the primary air of the third section ash bucket and the fourth section ash bucket is improved, the combustion intensity above the third section ash bucket and the fourth section ash bucket is enhanced, the combustion intensity in the middle of the incinerator 1 is enhanced because the third section ash bucket and the fourth section ash bucket are positioned in the middle of the five ash buckets, the garbage combustion is more complete, and the heat ignition rate of ash slag is reduced.
Illustratively, the oxygen supply apparatus 3 includes an air separation apparatus or a liquid oxygen apparatus.
The air separation equipment can flexibly select a VPSA pressure swing adsorption or a cryogenic air separation plant according to project capacity, and the cryogenic air separation plant is used for explanation as follows: the deep cooling air separation equipment is equipment which takes air as a raw material, turns the air into liquid by a compression cycle deep freezing method, and gradually separates and produces inert gases such as oxygen, nitrogen, argon and the like from the liquid air by rectification. The air separation equipment mainly comprises an air filtering system, an air compression system, an air precooling and purifying system, a fractionating tower system and a storage vaporization system. The air filtering system is used for filtering mechanical impurities in air, and the main equipment is a self-cleaning air filter; the air compression system is used for pre-compressing air, and main equipment comprises a steam turbine, a supercharger, an air compressor and the like; the air pre-cooling and purifying system is used for primarily cooling compressed air and removing impurities such as moisture, carbon dioxide and the like in the compressed air, and mainly comprises an air cooling tower, a water cooling tower, a molecular sieve purifier, a cooling water pump, a freezing water pump and the like; the fractionating tower system is used for deeply cooling purified compressed air and then fractionally distilling oxygen, nitrogen, argon and the like step by step, and the main equipment comprises a turboexpander and a cold box (comprising a main tower, a main cooler, a main condenser, a subcooler, a crude argon tower, a liquid oxygen pump, a liquid pump and the like); the storage vaporization system is used for storing, vaporizing and filling fractionated liquid oxygen, liquid nitrogen and liquid argon, and the main equipment comprises a low-temperature liquid storage tank, a vaporizer, a bottle filling pump, a filling platform and the like.
Liquid oxygen plants include, but are not limited to, liquid oxygen storage tanks, and the like for cryogenic liquid storage of oxygen.
By replacing part of primary air with oxygen, namely increasing the amount of oxidant under the condition of not increasing primary air quantity, the combustion process can be promoted, the oxygen concentration is increased, the combustion intensity can be increased, the combustion temperature is increased, the burnout of low-calorific-value garbage is promoted, and meanwhile, the fly ash circulating back to the incinerator is fused and condensed into large particles, so that the generation of fly ash is reduced, the cost for burying the fly ash is reduced, and certain economic benefit is brought for a garbage incineration power generation project.
The utility model discloses a waste incineration device is still including exhaust-heat boiler 5, gas cleaning equipment 6 and the dust collecting equipment 7 that sets gradually. Wherein, the exhaust-heat boiler 5 and the dust removing device 7 are used as fly ash collecting devices for collecting fly ash in the flue gas generated by the incinerator 1.
The waste heat boiler 5 is mainly used for recovering the waste heat of the flue gas at the outlet of the incinerator 1. Optionally, the heat of the flue gas generated by the incinerator 1 recovered by the exhaust-heat boiler 5 can be used for heating the feed water to generate superheated steam, and then the turbine drives the generator to generate electricity. Further, as shown in fig. 1, an ash hopper is disposed at the bottom of the exhaust-heat boiler, and a part of fly ash in the flue gas is settled in the exhaust-heat boiler and discharged through the ash hopper.
The flue gas discharged from the waste heat boiler 5 passes through a flue gas cleaning device 6 to remove harmful gases in the flue gas. The flue gas cleaning equipment 6 includes, but is not limited to, deacidification and denitration equipment, such as a reaction tower, slaked lime, activated carbon or a combination thereof.
Next, the flue gas enters a dust removing device 7, as an example, the dust removing device 7 is a bag-type dust remover, to remove dust and particulate matter in the flue gas. The bag-type dust collector is a dry dust filter and is suitable for collecting fine, dry and non-fibrous dust. The filter bag is made of woven filter cloth or non-woven felt, the dust-containing gas is filtered by the filtering action of the fiber fabric, after the dust-containing gas enters the bag-type dust collector, the dust with large particles and large specific gravity falls into the dust hopper due to the sedimentation of the gravity, the dust is blocked when the gas containing the fine dust passes through the filter bag, and when the dust accumulated on the surface of the filter bag reaches a certain thickness, the dust on the filter bag is shaken off by the dust cleaning system in modes of vibration, back blowing or pulse blowing and the like according to a set program and falls into the dust hopper.
One or more fans are also arranged at the rear end of the dust removal device 7, and are used for guiding the treated flue gas to the atmosphere via the chimney 10, and can also be used for guiding the treated flue gas as recycled flue gas, and the recycled flue gas can be used as secondary air and/or primary air of the incinerator 1.
The utility model discloses a waste incineration device still includes flying dust circulating equipment, and the configuration will the flying dust of collection is sent to burn in the burning furnace 1. Further, the fly ash circulation device includes a screw conveyor 8 and an air conveying pipe 9.
Exemplarily, the utility model discloses a waste incineration device still includes rubbish feed arrangement 4, and on the one hand, rubbish feed arrangement 4 will wait that the rubbish that burns sends into the incinerator and burn, and on the other hand, rubbish feed arrangement 4 with flying dust circulating equipment is connected, the flying dust that flying dust collecting device collected is sent to with waiting to burn rubbish together in the incinerator 1 via rubbish feed arrangement 4.
The fly ash generated by burning the garbage is sent into the incinerator 1 in the oxygen-enriched environment in a throwing mode through the fly ash circulating equipment, and the fly ash is fused and condensed into large particles by utilizing the high temperature generated by oxygen-enriched combustion of the garbage in the combustion section, so that the generation of fly ash is reduced, the cost for burying the fly ash is reduced, and the economic benefit of a garbage power plant is improved.
According to the utility model provides an oxygen boosting burning combines waste incineration device of flying dust recycling, through oxygen supply equipment and the oxygen suppliment of a blast pipe way intercommunication in to the incinerator, the oxygen boosting environment is provided, and then improve combustion temperature, promote going on of combustion process, promote the burn-off of low calorific value rubbish, realize the rubbish minimizing, fly ash in the flue gas of collecting equipment collection of fly ash through fly ash circulating equipment is sent to in the incinerator and is carried out the fly ash recycling simultaneously, make the fly ash melting condense to the large granule, reduce the production of fly ash volume, thereby reduce the expense that the landfill fly ash produced, bring certain economic benefits for the msw incineration power generation project.
The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. A waste incineration device combining oxygen-enriched combustion and fly ash recycling is characterized by comprising:
an incinerator configured to incinerate the garbage to generate flue gas;
a primary air duct in communication with a bottom of the incinerator configured to provide primary air to the incinerator;
an oxygen supply apparatus in communication with the primary air duct configured to supply oxygen to the incinerator;
a fly ash collection device configured to collect fly ash in the flue gas;
a fly ash recycling device configured to send the collected fly ash to the incinerator.
2. The waste incineration apparatus of claim 1, wherein the oxygen supply device comprises an air separation plant or a liquid oxygen plant.
3. The waste incineration device of claim 1, wherein the fly ash collection device includes a dust removal device and a waste heat boiler.
4. A refuse incineration device according to claim 1, characterised in that the bottom of the incineration furnace is provided with a plurality of ash hoppers through which the primary air enters the incineration furnace.
5. The refuse incineration apparatus according to claim 4, wherein oxygen generated by the oxygen supply device is introduced into the incinerator through a part of the ash bucket.
6. The waste incineration apparatus of claim 5, wherein the bottom of the incinerator is provided with five stages of ash hoppers, wherein the primary air introduced from the first, second and fifth stages of ash hoppers is only air, and the primary air introduced from the third and fourth stages of ash hoppers contains oxygen supplied from the oxygen supply device.
7. The waste incineration device of claim 1, further comprising: the garbage feeding device is connected with the fly ash circulating device and is configured to send the garbage and the fly ash to the incinerator.
8. The waste incineration device of claim 1, wherein the fly ash circulation means includes a screw conveyor and a pneumatic conveying pipe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920574610.0U CN210398933U (en) | 2019-04-23 | 2019-04-23 | Waste incineration device combining oxygen-enriched combustion with fly ash recycling |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920574610.0U CN210398933U (en) | 2019-04-23 | 2019-04-23 | Waste incineration device combining oxygen-enriched combustion with fly ash recycling |
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| CN210398933U true CN210398933U (en) | 2020-04-24 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113883529A (en) * | 2020-07-01 | 2022-01-04 | 袁安之 | Immediate circulation treatment technology and method for incineration fly ash of industrial kiln incineration waste |
| CN113877406A (en) * | 2021-11-17 | 2022-01-04 | 上海康恒环境股份有限公司 | Waste incineration flue gas treatment system and treatment method |
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2019
- 2019-04-23 CN CN201920574610.0U patent/CN210398933U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113883529A (en) * | 2020-07-01 | 2022-01-04 | 袁安之 | Immediate circulation treatment technology and method for incineration fly ash of industrial kiln incineration waste |
| CN113877406A (en) * | 2021-11-17 | 2022-01-04 | 上海康恒环境股份有限公司 | Waste incineration flue gas treatment system and treatment method |
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