CN109611850A - A kind of refuse incinerator low NOx combustion system - Google Patents
A kind of refuse incinerator low NOx combustion system Download PDFInfo
- Publication number
- CN109611850A CN109611850A CN201811516436.0A CN201811516436A CN109611850A CN 109611850 A CN109611850 A CN 109611850A CN 201811516436 A CN201811516436 A CN 201811516436A CN 109611850 A CN109611850 A CN 109611850A
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- CN
- China
- Prior art keywords
- flue gas
- air
- nozzle
- backflow
- boiler
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
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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
-
- 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
- F23G5/46—Recuperation of heat
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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
- F23G5/50—Control or safety arrangements
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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
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
- F23J15/025—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
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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
- F23L1/00—Passages or apertures for delivering primary air for combustion
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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
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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
- F23L5/00—Blast-producing apparatus before the fire
- F23L5/04—Blast-producing apparatus before the fire by induction of air for combustion, e.g. using steam jet
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2202/00—Combustion
- F23G2202/10—Combustion in two or more stages
- F23G2202/106—Combustion in two or more stages with recirculation of unburned solid or gaseous matter into combustion chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2206/00—Waste heat recuperation
- F23G2206/20—Waste heat recuperation using the heat in association with another installation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2207/00—Control
- F23G2207/30—Oxidant supply
-
- 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
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The present invention relates to burning city domestic garbage fields, especially a kind of to be directed to grate-type domestic waste incineration low NOx combustion system, main body includes smoke backflow blower, primary air fan, electric control valve, manual modulation valve, smoke wind pipe, smoke backflow header and nozzle.Flue gas from bag house outlet is sufficiently mixed with the First air exported from primary air fan, and flue gas uniformly sprays into burner hearth by encircleing two layers of nozzle before and after boiler under the action of flowing back blower respectively after mixing.Present invention process system is simple, stable, it can be effectively controlled fire box temperature and realize low oxygen combustion, it reduces and burns outlet of still NOx original concentration, improve boiler capacity, while the low-temperature corrosions problem such as boiler coke and reflux blower, pipeline, nozzle can have been further prevented.
Description
Technical field
The present invention relates to burning city domestic garbage field, especially a kind of waste incinerator low NOx combustion system.
Background technique
In recent years, the burning disposal amount of Municipal Solid Waste in China is substantially improved, and reciprocating machine grate furnace incineration technology exists
It is widely used both at home and abroad, is current optimum burning disposal rubbish and produces steaming using the thermal energy that waste incineration generates
Technology of the vapour for power generation.Meanwhile flue gas discharged in burning standard is also increasingly strict, realizes that minimum discharge has become waste incineration
The trend of power industry development.The NOx of garbage burning factory boiler emission can form acid rain and photochemical fog in an atmosphere, harm
The normal growth of human health and crops.
However, rubbish is during incinerator burns, there are still following problems: 1. excess air coefficients are excessive, usually exist
Between 1.7~2.0, boiler exhaust gas loss further causes system for cleaning fume greatly and the load of air-introduced machine is excessive.2. combustion
The content for burning NOx in the flue gas generated is higher.
Summary of the invention
Object of the present invention is to solve boiler efficiency caused by burning flue gas loss big, NOx original concentration height, flue gas overtemperature etc.
Low, the problems such as operating cost is high.
In order to solve the above technical problems, the present invention provides a kind of refuse incinerator low NOx combustion system, including one
Secondary blower, First air branch pipe(tube), First air preheater, incinerator, waste heat boiler, smoke backflow blower, returns at First air main pipeline
Stream flue, manually adjusts door, header, nozzle at electric adjustable section door.Wherein, backflow flue gas is drawn from sack cleaner, is passed through
Backflow flue gas pipeline is connected with reflux blower；Combustion air enters primary air fan by First air main pipeline from dump pit,
It is divided to two branches after the heating of First air preheater, entering slag bucket below fire grate by the First air of branch is incineration firing in furnace
Required oxygen；First air is connect with backflow flue gas pipeline in branch, reflux blower is entered after mixing with backflow flue gas, after mixing
Flue gas encircles header by front and back and nozzle enters in incinerator.
Further, the smoke backflow after depickling and dedusting is entered in bag house outlet setting backflow flue gas interface
Furnace.
Further, cancel independent secondary air fan, a part of hot-air after preheater heats utilizes First air
Compressing head enters after First air branch pipe(tube) is mixed with backflow flue gas to be used as incinerator Secondary Air, and is set in First air branch pipe(tube)
Electric adjustable section door is to control secondary air flow.
Further, position at outlet of still and exhaust-heat boiler inlet is being burned, i.e., arch respectively sets symmetrical reflux cigarette before and after boiler
It two layers of gas jets, sets before header and manually adjusts door, the symmetrical interlaced arrangement of every layer of nozzle.
Further, nozzle and level are at 20 DEG C at boiler front arch, and nozzle level direction is arranged at boiler rear arch, mix cigarette
Gas blowout enters to be intersected in incineration flue gas center in furnace, forms strong turbulent flow, and the content of CO in maximum flue gas guarantees sufficiently combustion
It burns.
Technical solution provided by the invention, can achieve it is following the utility model has the advantages that can reduce burn outlet of still oxygen content 5% with
Under, realize low oxygen combustion, it is suppressed that the generation of fuel type NOx.
Secondly, touching mouth arrangement using two layers, by 950 DEG C of flue gas temperature of hearth outlet or so fluctuations of control, realizes and stablize
Burning inhibits thermal NO x and CO to generate, while can prevent boiler coke, increases the service life of refractory material.
In addition, by realizing that excess air coefficient than burning, is maintained at 1.4 or less, it is suppressed that fuel type NOx by low latitude gas
It generates, while improving generating efficiency；The reduction of exhaust smoke level is conducive to the simplification of fume treatment and its subsystem, reduces investment
And operating cost.
Finally, mixing using hot Secondary Air with backflow flue gas, the oxygen amount in boiler export flue gas can be flexibly controlled, while can
Effectively avoid the low-temperature corrosions problem such as backflow flue gas pipeline and blower, nozzle.
Detailed description of the invention:
Fig. 1 is waste incinerator low NOx combustion system structural schematic diagram of the present invention.
Fig. 2 is arrangement of nozzles schematic diagram of the invention.
Fig. 3 is the schematic diagram that boiler front arch nozzle of the invention is connect with header.
Fig. 4 is the schematic diagram that boiler rear arch nozzle of the invention is connect with header.
In figure, 1- electric adjustable section door, 2- First air blower, 3- First air preheater, 4- flows back blower, and 5- manually adjusts door, 6-
Incinerator, 7- waste heat boiler, the first branch pipe(tube) of 8- First air, the second branch pipe(tube) of 9- First air, 10- First air main pipeline, 11- cigarette
Gas reflux line, 12- header, 13- nozzle, 14- boiler front arch, 15- boiler rear arch.
Specific embodiment
For the object of the invention, technical solution and advantage is more clearly understood, below with reference to attached drawing and reality of the invention
Example carries out clear and complete description to the present invention；
There are mainly two types of NOx is generated in waste incinerator: thermal NO x and fuel type NOx, furnace temperature is excessively high or temperature field is divided
Cloth unevenness easily leads to thermal NO x generation, the more big easy generation fuel type NOx of excess air coefficient.
For this purpose, the present invention provides a kind of refuse incinerator low NOx combustion systems, as shown in Figure 1, including First air
Machine 2, First air main pipeline 10, First air branch pipe(tube) are the first branch pipe(tube) of First air 8, the second branch pipe(tube) of First air 9, one respectively
Secondary wind preheater 3, waste heat boiler 7, smoke backflow blower 4, backflow flue gas pipeline 11, electric adjustable section door 1, is adjusted incinerator 6 manually
Section door 5, header 12, nozzle 13.
The bag house outlet sets pipe joint, and backflow flue gas is drawn from bag house outlet, passes through the cigarette that flows back
Feed channel is connected with reflux blower；Combustion air enters primary air fan by First air main pipeline from dump pit, through primary
It is divided to two branches after the heating of wind preheater, fire grate lower section slag bucket is entered for needed for incineration firing in furnace by the First air of branch
Oxygen；First air is connect with backflow flue gas pipeline in another branch, and reflux blower, cigarette after mixing are entered after mixing with backflow flue gas
Gas encircles header by front and back and nozzle enters in incinerator.As shown in Fig. 2, arrangement of nozzles schematic diagram of the invention.Fig. 3 is this hair
The schematic diagram that bright boiler front arch nozzle is connect with header.Fig. 4 is the signal that boiler rear arch nozzle of the invention is connect with header
Figure.Position at outlet of still and exhaust-heat boiler inlet is being burned, i.e. boiler front arch 14, rear arch 5 respectively sets symmetrical backflow flue gas nozzle two
Layer, it is set before header and manually adjusts door, the symmetrical interlaced arrangement of every layer of nozzle.
The low NOx operation of incinerator mainly has two o'clock: first is that control chamber flue gas temperature at 950 DEG C hereinafter, not less than 850
DEG C 2 seconds, second is that control the oxygen content of flue gas 5% once.
It is controlled in terms of fire box temperature, when incinerator is run, is by adjusting First air blower 2 and electric adjustable section door 1
Incinerator provides combustion air, while according to furnace exit temperature, adjusting reflux 4 frequency of blower and 1 aperture of electric adjustable section door,
950 DEG C of furnace temperature or less are burned to adjust by changing smoke backflow amount ratio.
About the control of boiler export oxygen amount, when guaranteeing that furnace exit temperature is normal, according to heat boiler outlet oxygen amount,
It is that boiler supplements oxygen amount by the electric adjustable section door 1 adjusted in secondary air duct 9, guarantees boiler export oxygen amount below 5%.
The following are specific examples of the invention: garbage treatment quantity 750t/d, refuse thermal value 1900kcal/kg, a wind-warm syndrome
150 DEG C, 150 DEG C of backflow flue gas temperature, 950 DEG C of heater outlet temperature are burned, oxygen amount can be controlled in 5% hereinafter, according to incinerator energy
Amount balance and material balance, smoke backflow ratio can increase 2.0t/h up to 19.2%, using boiler capacity when the system.
Claims (6)
1. a kind of refuse incinerator low NOx combustion system, which is characterized in that including primary air fan, First air main pipeline, one
Secondary wind branch pipe(tube), First air preheater, incinerator, waste heat boiler, smoke backflow blower, backflow flue gas pipeline, electric adjustable section door,
Manually adjust door, header, nozzle；Wherein, backflow flue gas is drawn from sack cleaner, passes through backflow flue gas pipeline and reflux blower
It is connected；Combustion air enters primary air fan by First air main pipeline from dump pit, divides after the heating of First air preheater
Two branches, entering slag bucket below fire grate by the First air of the first branch is oxygen needed for incineration firing in furnace；Second
First air is connect with backflow flue gas pipeline in road, reflux blower is entered after mixing with backflow flue gas, flue gas passes through front and back after mixing
Arch header and nozzle enter in incinerator.
2. a kind of refuse incinerator low NOx combustion system according to claim 1, which is characterized in that removed in pocket type
Dirt device outlet setting backflow flue gas interface, enters furnace for the smoke backflow after depickling and dedusting.
3. a kind of refuse incinerator low NOx combustion system according to claim 1, which is characterized in that do not set independence
Secondary air fan, a part of hot-air after preheater heats enters First air branch pipe(tube) and returns using primary air fan pressure head
It uses after stream flue gas mixing as incinerator Secondary Air, and it is secondary distinguished and admirable to control in First air branch pipe(tube) to set electric adjustable section door
Amount.
4. a kind of refuse incinerator low NOx combustion system according to claim 1, which is characterized in that before boiler
Rear arch is symmetrical arranged two layers of backflow flue gas nozzle, sets before header and manually adjusts door, the symmetrical interlaced arrangement of every layer of nozzle.
5. a kind of refuse incinerator low NOx combustion system according to claim 1, which is characterized in that boiler front arch
Locate nozzle and level into 20 DEG C, nozzle level direction is arranged at boiler rear arch；Mixed flue gas sprays into furnace and is intersected in incineration flue gas
Center reduces the content of CO in flue gas by forming strong turbulent flow to greatest extent.
6. a kind of refuse incinerator low NOx combustion system according to claim 1, which is characterized in that pass through burning
Oxygen content in outlet of still flue-gas temperature and flue gas adjusts backflow flue gas amount and primary air flow respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811516436.0A CN109611850A (en) | 2018-12-12 | 2018-12-12 | A kind of refuse incinerator low NOx combustion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811516436.0A CN109611850A (en) | 2018-12-12 | 2018-12-12 | A kind of refuse incinerator low NOx combustion system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109611850A true CN109611850A (en) | 2019-04-12 |
Family
ID=66007970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811516436.0A Pending CN109611850A (en) | 2018-12-12 | 2018-12-12 | A kind of refuse incinerator low NOx combustion system |
Country Status (1)
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| CN (1) | CN109611850A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110454802A (en) * | 2019-09-05 | 2019-11-15 | 成都市兴蓉再生能源有限公司 | The concentrate for reducing nitrous oxides concentration in furnace enters furnace and returns spray system and return spray method |
| CN110848737A (en) * | 2019-12-16 | 2020-02-28 | 河北约翰节能设备科技有限公司 | Organic matter high-temperature gasification low-oxygen fractional combustion method |
| CN114198759A (en) * | 2021-11-23 | 2022-03-18 | 浦湘生物能源股份有限公司 | Self-adaptive control method and system for oxygen amount of garbage incinerator |
| CN114251664A (en) * | 2021-12-28 | 2022-03-29 | 上海康恒环境股份有限公司 | Garbage incinerator and reheating flue gas backflow system thereof |
| CN114263912A (en) * | 2021-12-31 | 2022-04-01 | 上海康恒环境股份有限公司 | Garbage incinerator and primary air chamber supporting beam cooling system thereof |
| CN116951424A (en) * | 2023-08-04 | 2023-10-27 | 南通万达能源动力科技有限公司 | Self-adaptive adjustment method for valve of incineration boiler based on data driving |
-
2018
- 2018-12-12 CN CN201811516436.0A patent/CN109611850A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110454802A (en) * | 2019-09-05 | 2019-11-15 | 成都市兴蓉再生能源有限公司 | The concentrate for reducing nitrous oxides concentration in furnace enters furnace and returns spray system and return spray method |
| CN110848737A (en) * | 2019-12-16 | 2020-02-28 | 河北约翰节能设备科技有限公司 | Organic matter high-temperature gasification low-oxygen fractional combustion method |
| CN110848737B (en) * | 2019-12-16 | 2021-09-03 | 河北约翰节能设备科技有限公司 | Organic matter high-temperature gasification low-oxygen fractional combustion method |
| CN114198759A (en) * | 2021-11-23 | 2022-03-18 | 浦湘生物能源股份有限公司 | Self-adaptive control method and system for oxygen amount of garbage incinerator |
| CN114251664A (en) * | 2021-12-28 | 2022-03-29 | 上海康恒环境股份有限公司 | Garbage incinerator and reheating flue gas backflow system thereof |
| CN114251664B (en) * | 2021-12-28 | 2023-12-22 | 上海康恒环境股份有限公司 | Garbage incinerator and reheat flue gas reflux system thereof |
| CN114263912A (en) * | 2021-12-31 | 2022-04-01 | 上海康恒环境股份有限公司 | Garbage incinerator and primary air chamber supporting beam cooling system thereof |
| CN116951424A (en) * | 2023-08-04 | 2023-10-27 | 南通万达能源动力科技有限公司 | Self-adaptive adjustment method for valve of incineration boiler based on data driving |
| CN116951424B (en) * | 2023-08-04 | 2024-03-12 | 南通万达能源动力科技有限公司 | Self-adaptive adjustment method for valve of incineration boiler based on data driving |
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