CN113280351A - Flue gas recirculation system of household garbage incineration power plant - Google Patents
Flue gas recirculation system of household garbage incineration power plant Download PDFInfo
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- CN113280351A CN113280351A CN202110716679.4A CN202110716679A CN113280351A CN 113280351 A CN113280351 A CN 113280351A CN 202110716679 A CN202110716679 A CN 202110716679A CN 113280351 A CN113280351 A CN 113280351A
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- flue gas
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- pipeline
- fan
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 105
- 239000003546 flue gas Substances 0.000 title claims abstract description 105
- 239000000428 dust Substances 0.000 claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 claims abstract description 20
- 238000004056 waste incineration Methods 0.000 claims description 15
- 239000010791 domestic waste Substances 0.000 claims description 14
- 239000007789 gas Substances 0.000 claims description 5
- 238000006477 desulfuration reaction Methods 0.000 claims description 4
- 230000023556 desulfurization Effects 0.000 claims description 4
- 239000000779 smoke Substances 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 abstract description 29
- 239000001301 oxygen Substances 0.000 abstract description 12
- 229910052760 oxygen Inorganic materials 0.000 abstract description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 8
- 238000004939 coking Methods 0.000 abstract description 6
- 239000011261 inert gas Substances 0.000 abstract description 4
- 238000010248 power generation Methods 0.000 abstract description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000011946 reduction process Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 210000000867 larynx Anatomy 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/006—Layout of treatment plant
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/20—Sulfur; Compounds thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2217/00—Intercepting solids
- F23J2217/10—Intercepting solids by filters
- F23J2217/101—Baghouse type
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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
- Y02E20/12—Heat utilisation in combustion or incineration of waste
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Incineration Of Waste (AREA)
Abstract
The invention discloses a flue gas recirculation system of a household garbage incineration power plant, which comprises an incinerator, a reaction tower, a dust remover, an induced draft fan, a chimney and an air preheater, wherein a flue gas outlet of the incinerator is connected with an inlet of the reaction tower, an outlet of the reaction tower is connected with one end of the dust remover, the other end of the dust remover is connected with one end of the induced draft fan, the other end of the induced draft fan is connected with the chimney, air is introduced into one end of the air preheater, and the other end of the air preheater and the other end of the induced draft fan are connected with a secondary air chamber of the incinerator. The invention increases the content of inert gas in the combustion area by replacing part of secondary air with the recirculated flue gas, absorbs heat of the flue gas and dilutes the concentration of oxygen, and the flue gas is spread and combusted with combustion-supporting air in high-temperature and low-oxygen atmosphere, the volume of flame is multiplied, the local high-temperature area is reduced, the temperature distribution is more uniform, the generation of thermal NOx is inhibited, the coking problem of a hearth can be improved, and the heat efficiency and the power generation capacity are improved.
Description
Technical Field
The invention relates to a flue gas recirculation system, in particular to a flue gas recirculation system of a household garbage incineration power plant, belonging to the field of garbage incineration treatment.
Background
Along with the improvement of the economic level, the development of the waste incineration power generation industry is favorable for resource recycling, harmlessness, energy conservation and other advantages, and is popularized and developed by a plurality of international countries. At present, the technique of some developed countries is more advanced, can high-efficient the processing burn the flue gas that produces, reduces the emission of pollutant, can reach zero pollution's effect even. At present, the domestic waste incineration power plant has incomplete technology, generally serious coking and high furnace shutdown and ash removal frequency; the combustion is unstable, the temperature fluctuation of the first flue is large, and the environment-friendly requirement of 850 ℃ and 2s is influenced; the waste heat boiler has low combustion efficiency and influences the evaporation capacity of the boiler; the concentration of NOx emission is relatively high, the consumption of reducing agent is large, and the like.
In a combustion method using ultra-low-volume air, which has been developed in recent years, a part of flue gas generated by burning is extracted and mixed with combustion air, and then the mixture is fed into a furnace to be burned. The flue gas is basically inert gas, and the heat absorption and the oxygen concentration reduction of the flue gas reduce the temperature of the main combustion area, so that the generation of NOx can be reduced. The circulating flue gas is sprayed to the proper position of the incinerator to prevent the hearth from coking due to overhigh temperature. Under the high-temperature low-oxygen environment, the garbage is more sufficiently and stably combusted, the retention time in the furnace is ensured, and the yield of steam is improved.
The chinese intellectual property office 2020, 4.7.s discloses a utility model patent with publication number CN212178888U, entitled "a system for reducing nitrogen oxide emission of garbage incinerator", which provides a method for reducing nitrogen oxide emission of garbage incinerator comprising: an inlet pipeline of the primary air fan sucks air from the garbage pit, an outlet of the induced draft fan is connected with a flue gas recirculation pipe, and the flue gas recirculation pipe is connected with an inlet of the primary air fan; an outlet pipe of the primary air fan is heated by a heating surface at the tail part of the boiler and then is sent to a primary air chamber; the primary air chamber is also provided with a hearth which is provided with a secondary fan inlet, and the flue gas recirculation pipe is communicated with the secondary fan inlet. This patent suffers from the following drawbacks: 1) the primary air is sucked from the garbage pit in front of the furnace to the heated surface at the tail part for heating and then is sent back to the front of the furnace, the flue gas recirculation pipe at the tail part is connected with the primary air inlet pipe in front of the furnace, and the pipeline is too long and is complex to integrally arrange.
The chinese intellectual property office 2020, 7/23/year discloses a utility model patent with publication number CN211119357U, entitled "a domestic waste incineration apparatus", which provides a domestic waste incineration apparatus comprising: burn burning furnace and the gas cleaning device who is connected with burning furnace, the entry and the gas cleaning device exit linkage of recirculated flue gas pipeline, the export of recirculated flue gas pipeline extends to the larynx mouth of burning furnace, and recirculated flue gas lets in burning furnace as the overgrate air, and the tie point of burn-off air pipeline and burning furnace is located the top of the tie point of recirculated flue gas pipeline and burning furnace, and the burn-off air pipeline is used for carrying the air to burning furnace. The patent has the following defects: 1) the air supplemented from the burnout air pipe is cold air, which can affect the temperature distribution of the hearth under the condition of large air quantity, possibly resulting in insufficient combustion and failing to meet the requirement of flue gas at 850 ℃/2 seconds. 2) Two fans are required to separately introduce the recirculated flue gas and the burnout zone air into the furnace.
The chinese intellectual property office 2018, 1 month and 30 days, discloses a utility model patent with publication number CN206944178U, entitled "a flue gas treatment system", which provides a flue gas treatment system comprising: an incinerator; the flue gas cooling system is used for cooling high-temperature flue gas discharged by the incinerator to obtain cooling flue gas; and the flue gas recirculation system converts part of the cooled flue gas into recirculated flue gas and introduces the recirculated flue gas into the incinerator. This patent suffers from the following drawbacks: when the oxygen content in the flue gas is low and the primary air or the secondary air is completely replaced by the recycled flue gas, the recycled flue gas quantity must be increased in order to ensure the discharge amount of CO, but the combustion temperature is reduced and the incomplete combustion is increased due to a large amount of flue gas.
From the above, the existing flue gas recirculation technology of the domestic waste incineration power plant mainly has the following problems: 1. the primary and secondary air pipes are completely combined with the flue gas recirculation pipeline system, so that the pipeline arrangement is long; 2. the supplementary air is cold air, and the temperature distribution of the hearth is influenced; 3. the independent introduction of air requires an additional fan, so that the cost is increased; 4 completely replacing the primary or secondary air with the amount of recirculated flue gas, may result in incomplete combustion.
Disclosure of Invention
The invention aims to solve the technical problem of providing a flue gas recirculation system of a household garbage incineration power plant, which replaces part of multi-core gas in a secondary air chamber combustion area with recirculated flue gas to increase the content, inhibits the generation of thermal NOx and improves the coking problem of a hearth.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the utility model provides a flue gas recirculation system of domestic waste incineration power plant which characterized in that: contain and burn burning furnace, reaction tower, dust remover, draught fan, chimney and air heater, burn the exhanst gas outlet and the reaction tower access connection of burning furnace, the reaction tower export is connected with dust remover one end, and the dust remover other end is connected with draught fan one end, and the draught fan other end is connected with the chimney, and air heater one end lets in the air, and the air heater other end and the connection of the draught fan other end burn burning furnace secondary plenum.
Furthermore, one end of the air preheater is connected with one end of a cold air pipeline, air is introduced into the other end of the cold air pipeline, the other end of the air preheater is connected with one end of a secondary air pipeline, the other end of the secondary air pipeline is connected with one end of a flue gas recirculation fan, the other end of the flue gas recirculation fan is connected with a secondary air chamber through an outlet pipeline, and the secondary air chamber is communicated with a hearth of the incinerator.
Further, a first air adjusting door is arranged on the secondary air pipeline.
Further, the other end of the induced draft fan is connected with the secondary air pipeline through a flue gas recirculation pipeline, and the connecting position of the flue gas recirculation pipeline and the secondary air pipeline is located between the flue gas recirculation fan and the first air adjusting door.
Further, a second air adjusting door is arranged on the smoke recycling pipeline.
Furthermore, the upper side of the tail end of the fire grate of the incinerator is connected with one end of a leading-out pipeline, the other end of the leading-out pipeline is connected with one end of a fan, and the other end of the fan is connected with a secondary air chamber.
Further, the reaction tower is a deacidification and desulfurization reaction tower.
Further, the dust remover adopts a fibrous filter bag dust remover.
Compared with the prior art, the invention has the following advantages and effects:
1. the invention increases the content of inert gas in the combustion area by replacing part of secondary air with the recirculated flue gas, absorbs heat of the flue gas and dilutes the concentration of oxygen, and the flue gas is spread and combusted with combustion-supporting air in high-temperature and low-oxygen atmosphere, the volume of flame is multiplied, the local high-temperature area is reduced, the temperature distribution is more uniform, the generation of thermal NOx is inhibited, and the coking problem of a hearth can be improved; the steam generation amount is improved under a stable combustion environment, and the heat efficiency and the power generation amount are further improved;
2. the secondary air and the recirculated flue gas are sent to the secondary air chamber through the flue gas recirculation fan, so that the cost of one fan is saved, the secondary air is taken near the fan, and the pipeline arrangement is simple;
3. the secondary air is hot air heated by the air preheater and sprayed into the hearth, so that the local temperature cannot be too low, the temperature distribution of the hearth is uniform, and the combustion is more sufficient;
4. because the oxygen content in the flue gas is low, in order to ensure the discharge of CO, the amount of the recirculated flue gas must be increased, but a large amount of the flue gas can cause the combustion temperature to be reduced and the incomplete combustion to be increased, so that the addition of one path of hot air can reduce the amount of the supplemented flue gas, maintain the combustion temperature and ensure the complete combustion;
5. the invention can reduce the excess air coefficient of the main combustion area by extracting the flue gas from the tail end of the grate of the incinerator, and the condition promotes the NOx reduction process and greatly reduces the generation of NOx; on the other hand, the speed of the flue gas in the lower hearth is reduced by extracting the flue gas at the tail end of the fire grate, so that the flying ash brought into the boiler is reduced, and the cost for cleaning the boiler and the flue is reduced.
Drawings
Fig. 1 is a schematic view of a flue gas recirculation system of a domestic waste incineration power plant according to the present invention.
Detailed Description
To elaborate on technical solutions adopted by the present invention to achieve predetermined technical objects, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, it is obvious that the described embodiments are only partial embodiments of the present invention, not all embodiments, and technical means or technical features in the embodiments of the present invention may be replaced without creative efforts, and the present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.
As shown in figure 1, the flue gas recirculation system of the household garbage incineration power plant comprises an incinerator 1, a reaction tower 2, a dust remover 3, an induced draft fan 4, a chimney 5 and an air preheater 6, wherein a flue gas outlet of the incinerator 1 is connected with an inlet of the reaction tower 2, an outlet of the reaction tower 2 is connected with one end of the dust remover 3, the other end of the dust remover 3 is connected with one end of the induced draft fan 4, the other end of the induced draft fan 4 is connected with the chimney 5, air is introduced into one end of the air preheater 6, and the other ends of the air preheater 6 and the induced draft fan 4 are connected with an incinerator secondary air chamber 7. The reaction tower 2 is a deacidification and desulfurization reaction tower. The dust remover 3 adopts a fibrous filter bag dust remover. High-temperature flue gas generated by combustion of the incinerator 1 passes through a plurality of heating surfaces, enters the reaction tower 2 for deacidification and desulfurization after being cooled, the temperature of the flue gas is further reduced, the flue gas discharged from the reaction tower 2 enters the dust remover 3, dust is collected through the fibrous filter bag, and the flue gas discharged from the dust remover 3 is guided to the chimney 5 by the induced draft fan 4. The content of inert gas in the combustion area is increased by replacing part of secondary air with the recirculated flue gas, the flue gas absorbs heat and dilutes the concentration of oxygen, and the flue gas and combustion air are spread and combusted in a high-temperature low-oxygen atmosphere, so that the flame volume is multiplied, a local high-temperature area is reduced, the temperature distribution is more uniform, the generation of thermal NOx is inhibited, and the coking problem of a hearth can be improved; the steam generation amount is improved under a stable combustion environment, and further the heat efficiency and the power generation amount are improved.
One end of an air preheater 6 is connected with one end of a cold air pipeline 8, the other end of the cold air pipeline 8 is filled with air, the other end of the air preheater 6 is connected with one end of a secondary air pipeline 9, the other end of the secondary air pipeline 9 is connected with one end of a flue gas recirculation fan 10, the other end of the flue gas recirculation fan 10 is connected with a secondary air chamber 7 through an outlet pipeline 11, and the secondary air chamber 7 is communicated with a hearth of an incinerator 1.
Wherein, the secondary air duct 9 is provided with a first damper 12. The other end of the induced draft fan 4 is connected with the secondary air pipeline 9 through a flue gas recirculation pipeline 13, and the connection position of the flue gas recirculation pipeline 13 and the secondary air pipeline 9 is located between the flue gas recirculation fan 10 and the first air damper 12. A second damper 14 is arranged on the flue gas recirculation duct 13.
And a flue gas recirculation pipeline 13 is led from the draught fan 4 to the chimney 5. The cold air pipeline 8 is connected to the inlet of the air preheater 6, the heated hot air is connected to the inlet of the flue gas recirculation fan 10 through the secondary air pipeline 9, the flue gas recirculation pipeline 13 is led to the secondary air pipeline 9 and is connected to the flue gas recirculation fan 10 together, and the flue gas recirculation fan 10 is connected to the secondary air chamber 7 of the incinerator through the outlet pipeline 11. By arranging the first damper 12 on the secondary air duct 9 and the second damper 14 on the flue gas recirculation duct 13, the distribution ratio of the recirculated flue gas amount and the secondary air amount can be controlled, and stable combustion is ensured. The secondary air and the recirculated flue gas are sent to the secondary air chamber through the flue gas recirculation fan, so that the cost of one fan is saved, the secondary air is taken near the fan, and the pipeline arrangement is simple; the secondary air is hot air heated by the air preheater and is sprayed into the hearth, so that the local temperature cannot be too low, the temperature distribution of the hearth is uniform, and the combustion is more sufficient; because the oxygen content in the flue gas is lower, in order to guarantee the discharge capacity of CO, the amount of the recirculated flue gas must be increased, but a large amount of flue gas can cause the combustion temperature to be reduced and incomplete combustion to be increased, so that the amount of supplemented flue gas can be reduced by adding one path of hot air, the combustion temperature is maintained, and complete combustion is guaranteed.
The upper side of the tail end of the fire grate of the incinerator 1 is connected with one end of a leading-out pipeline 15, the other end of the leading-out pipeline 15 is connected with one end of a fan 16, and the other end of the fan 16 is connected with a secondary air chamber 7. A pipeline 15 is led from the tail end of the grate of the incinerator, and a part of flue gas with high oxygen content is also sent to a secondary air chamber through a fan 16. On one hand, the excess air coefficient of the main combustion zone can be reduced, and the condition promotes the NOx reduction process, so that the generation of NOx is greatly reduced; on the other hand, the speed of the flue gas in the lower hearth is reduced by extracting the flue gas at the tail end of the fire grate, so that the flying ash brought into the boiler is reduced, and the cost for cleaning the boiler and the flue is reduced.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. The utility model provides a flue gas recirculation system of domestic waste incineration power plant which characterized in that: contain and burn burning furnace, reaction tower, dust remover, draught fan, chimney and air heater, burn the exhanst gas outlet and the reaction tower access connection of burning furnace, the reaction tower export is connected with dust remover one end, and the dust remover other end is connected with draught fan one end, and the draught fan other end is connected with the chimney, and air heater one end lets in the air, and the air heater other end and the connection of the draught fan other end burn burning furnace secondary plenum.
2. The flue gas recirculation system of a domestic waste incineration power plant according to claim 1, characterized in that: one end of the air preheater is connected with one end of a cold air pipeline, air is introduced into the other end of the cold air pipeline, the other end of the air preheater is connected with one end of a secondary air pipeline, the other end of the secondary air pipeline is connected with one end of a flue gas recirculation fan, the other end of the flue gas recirculation fan is connected with a secondary air chamber through an outlet pipeline, and the secondary air chamber is communicated with a hearth of the incinerator.
3. The flue gas recirculation system of a domestic waste incineration power plant according to claim 2, characterized in that: and a first air adjusting door is arranged on the secondary air pipeline.
4. The flue gas recirculation system of a domestic waste incineration power plant according to claim 3, characterized in that: the other end of the draught fan is connected with the secondary air pipeline through a flue gas recirculation pipeline, and the connecting position of the flue gas recirculation pipeline and the secondary air pipeline is located between the flue gas recirculation fan and the first air adjusting door.
5. The flue gas recirculation system of a domestic waste incineration power plant according to claim 4, characterized in that: and a second air adjusting door is arranged on the smoke recirculation pipeline.
6. The flue gas recirculation system of a domestic waste incineration power plant according to claim 1, characterized in that: the upper side of the tail end of the fire grate of the incinerator is connected with one end of a leading-out pipeline, the other end of the leading-out pipeline is connected with one end of a fan, and the other end of the fan is connected with a secondary air chamber.
7. The flue gas recirculation system of a domestic waste incineration power plant according to claim 1, characterized in that: the reaction tower is a deacidification and desulfurization reaction tower.
8. The flue gas recirculation system of a domestic waste incineration power plant according to claim 1, characterized in that: the dust remover adopts a fibrous filter bag dust remover.
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| CN202110716679.4A CN113280351A (en) | 2021-06-28 | 2021-06-28 | Flue gas recirculation system of household garbage incineration power plant |
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| CN202110716679.4A CN113280351A (en) | 2021-06-28 | 2021-06-28 | Flue gas recirculation system of household garbage incineration power plant |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114278944A (en) * | 2021-12-31 | 2022-04-05 | 上海康恒环境股份有限公司 | Flue gas recirculation system |
| CN115487658A (en) * | 2022-09-30 | 2022-12-20 | 北京天地融创科技股份有限公司 | Boiler denitration system |
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| CN105371282A (en) * | 2015-12-10 | 2016-03-02 | 光大环保（中国）有限公司 | low-nitrogen combustion garbage incinerator and combustion method |
| CN105782991A (en) * | 2016-05-17 | 2016-07-20 | 上海市环境工程设计科学研究院有限公司 | Efficient and clean incinerator |
| CN211119357U (en) * | 2019-07-26 | 2020-07-28 | 光大环保技术研究院（南京）有限公司 | Household garbage incineration equipment |
| CN217423262U (en) * | 2021-06-28 | 2022-09-13 | 中国天楹股份有限公司 | Flue gas recirculation system of household garbage incineration power plant |
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2021
- 2021-06-28 CN CN202110716679.4A patent/CN113280351A/en active Pending
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| CN105371282A (en) * | 2015-12-10 | 2016-03-02 | 光大环保（中国）有限公司 | low-nitrogen combustion garbage incinerator and combustion method |
| CN105782991A (en) * | 2016-05-17 | 2016-07-20 | 上海市环境工程设计科学研究院有限公司 | Efficient and clean incinerator |
| CN211119357U (en) * | 2019-07-26 | 2020-07-28 | 光大环保技术研究院（南京）有限公司 | Household garbage incineration equipment |
| CN217423262U (en) * | 2021-06-28 | 2022-09-13 | 中国天楹股份有限公司 | Flue gas recirculation system of household garbage incineration power plant |
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| CN114278944A (en) * | 2021-12-31 | 2022-04-05 | 上海康恒环境股份有限公司 | Flue gas recirculation system |
| CN115487658A (en) * | 2022-09-30 | 2022-12-20 | 北京天地融创科技股份有限公司 | Boiler denitration system |
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