CN110296601A - A kind of tunnel stove low nitrogen burning system and method for controlling combustion - Google Patents
A kind of tunnel stove low nitrogen burning system and method for controlling combustion Download PDFInfo
- Publication number
- CN110296601A CN110296601A CN201910675528.1A CN201910675528A CN110296601A CN 110296601 A CN110296601 A CN 110296601A CN 201910675528 A CN201910675528 A CN 201910675528A CN 110296601 A CN110296601 A CN 110296601A
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- air
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- chamber
- smoke backflow
- valve
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 28
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title abstract description 8
- 239000000779 smoke Substances 0.000 claims abstract description 55
- 238000010438 heat treatment Methods 0.000 claims abstract description 23
- 239000003546 flue gas Substances 0.000 claims abstract description 21
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 17
- 230000001105 regulatory effect Effects 0.000 claims abstract description 15
- 238000001514 detection method Methods 0.000 claims abstract description 12
- 230000001276 controlling effect Effects 0.000 claims abstract description 4
- 238000002156 mixing Methods 0.000 claims description 11
- 125000006850 spacer group Chemical group 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 5
- 238000010992 reflux Methods 0.000 claims description 5
- 230000004913 activation Effects 0.000 claims description 3
- 235000019504 cigarettes Nutrition 0.000 claims description 3
- 238000009841 combustion method Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims 1
- 230000007423 decrease Effects 0.000 abstract description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 5
- 229910002091 carbon monoxide Inorganic materials 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- -1 C+O =CO Chemical compound 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 239000010884 boiler slag Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/36—Arrangements of heating devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/40—Arrangements of controlling or monitoring devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D99/00—Subject matter not provided for in other groups of this subclass
- F27D99/0001—Heating elements or systems
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Regulation And Control Of Combustion (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind of tunnel stove low nitrogen burning system and method for controlling combustion, including stove, chimney is set on the right side of stove, O in detection flue gas is provided in chimney2、CO、NOxThe sensor of components and concentration, stove bottom air inlet mouth is equipped with wind-mixer, wind-mixer cabinet fresh air chamber, smoke backflow chamber with fresh air pipeline, smoke backflow pipeline connection, are wherein equipped with fresh-air volume regulating valve and connect air blower in pipe end respectively on fresh air pipeline；Smoke backflow adjustable valve, air-introduced machine are installed on smoke backflow pipeline；It further include having DCS control system, mixed air volume, fresh-air volume, smoke backflow adjustable valve are electrically connected with DCS control system controller, and controller issues control instruction control mixed air volume control valve, fresh air adjustable valve, smoke backflow adjustable valve, heating device, air-introduced machine, air blower and works.Stove low nitrogen burning of the present invention, short time limit, operating cost is low, small investment, and tradition is compared, short time limit 60%, operating cost decline 50~80%.
Description
Technical field
The present invention relates to field of environment protection equipment more particularly to a kind of tunnel stove low nitrogen burning system and Combustion System sides
Method.
Background technique
China's stove energy consumption accounts for industrial energy consumption and accounts for about 1/3, and the stove thermal efficiency that is averaged is lower by 20% or so than external, national
If the average energy conservation 10% of industrial furnace, the energy of saving is equivalent to 100,000,000 tons of standard coals.Meanwhile stove air-tightness is excessively poor, cigarette
Gas oxygen content reaches 20% or so, and Chinese tradition bag-type dust, desulfurizing tower, SCR, SNCR denitration method realize that minimum discharge is incompetent
For power.
In the combustion process of fuel, the generation of nitrogen oxides is some of combustion reaction: the nitrogen oxidation for generation of burning
If owner NO and NO2, it is referred to as NOx.And low nitrogen burning is to change combustion atmospheres, creates the condition of production carbon monoxide, C+O
=CO, carbon monoxide participate in reduction reaction, CO+2NO=CO2+N2；Then in combustion zone full combustion, reach slag ash phosphorus content
Decline, low nitrogen burning notice that adjusting boiler slag carbon content meets national standard.
Stove front changes burning condition, to reduce NOxDischarge, flue gas recirculation burning, inhibit partial CO 2
It generates, allows anoxycausis, generate carbon monoxide, carbon monoxide is strong oxidizer reduction nitric oxide, and stove rear portion allows flue gas to fill
Divided combustion generates carbon dioxide.
So, how oxygen content is reduced in stove, is current urgent problem to be solved, meanwhile, tunnel stove at present
Burning indoor fresh air can not be controlled with the mixed mixed gas temperature of backflow flue gas, into the mixed of the mixing in kiln
It closes gas temperature and the optimum temperature of Actual combustion is not achieved, to influence NO after burningxDischarge amount.
Summary of the invention
In order to make up the deficiency of prior art problem, the object of the present invention is to provide a kind of tunnel stove low nitrogen burning systems
And method for controlling combustion, stove minimum discharge transformation project particularity, invention stove low nitrogen burning, short time limit, operating cost is low,
Small investment solves the renovation technique bottleneck of stove minimum discharge for many years, effectively reduces NOxDischarge amount.
Technical scheme is as follows:
Feed inlet, discharge port is respectively set in tunnel stove low nitrogen burning system, including stove, stove left and right sides, and stove is right
Chimney is arranged in side, and O in detection flue gas is provided in chimney2、CO、NOxThe sensor of components and concentration, which is characterized in that the stove
Bottom air inlet mouth is equipped with wind-mixer, and the wind-mixer is case structure, cabinet have in be provided with upper spacer, lower clapboard, under
It is equipped with gap between partition and cabinet front plate, upper spacer and cabinet back side panel and constitutes flow channels, upper spacer, lower clapboard are by case
Body is divided into three layers, and cabinet is followed successively by smoke backflow chamber, fresh air chamber, Hybrid Heating chamber, Hybrid Heating chamber from bottom to top
Interior is equipped with heating device and temperature sensor, and cabinet upper end has multiple mixing air pipings, pacifies in each mixing air piping
Equipped with mixed air volume control valve；
Wind-mixer cabinet fresh air chamber, smoke backflow chamber respectively with fresh air pipeline, smoke backflow pipeline connection, wherein newly
Fresh-air volume regulating valve is installed in air piping and connects air blower in pipe end；Cigarette is sequentially installed on smoke backflow pipeline
Gas reflux adjustable valve, air-introduced machine；
It further include having DCS control system, the mixed air volume control valve, the fresh-air volume regulating valve, the flue gas return
Flow control valve is electrically connected with the controller of DCS control system, O in the detection flue gas2、CO、NOxThe sensor of components and concentration,
The indoor temperature sensor of Hybrid Heating chamber will acquire data feedback to the controller of the DCS control system, institute respectively
State controller for control mixed air volume control valve, fresh air adjustable valve, smoke backflow adjustable valve, heating device, air-introduced machine,
The working condition of air blower.
The tunnel stove low nitrogen burning system has close to smoke backflow Pipe installing in the smoke refluxing chamber room
Sieve plate, sieve plate will be divided into filtering chamber on front side of smoke backflow chamber.
The tunnel stove low nitrogen burning system, the air inlet of the air inlet of the fresh air chamber, smoke backflow chamber
On mouth cabinet right side plate, the air inlet of fresh air chamber is close to cabinet front plate, and the air inlet of smoke backflow chamber is after cabinet
Side plate.
The tunnel stove low nitrogen burning system is respectively set one in the smoke backflow chamber, fresh air chamber
Shaft, shaft outer wall have helical blade, and two both ends of the shaft are installed on the left side plate of cabinet, two shafts respectively with case
The air inlet of fresh air, smoke backflow chamber air inlet central coaxial on body.
The tunnel stove low nitrogen burning system, the Hybrid Heating chamber inner heating device be electric heater unit or
Steam heater.
The combustion method of the tunnel stove low nitrogen burning system, includes the following steps,
1), debugging and detection system fault-free, activation system manually adjust mixed air volume control valve, fresh-air volume is adjusted
Valve, smoke backflow adjustable valve minimum to maximum opening, and respective maximum is set on the controller of DCS control system and is opened
Degree, at the same adjust air blower, air-introduced machine working frequency minimum to maximum, determine be arranged maximum operation frequency；
2) mixed air volume control valve, fresh-air volume regulating valve, the aperture of smoke backflow adjustable valve, mixed air volume control are adjusted
Valve opening processed is 100%, and the aperture of fresh-air volume regulating valve is 70%~85%, and the aperture of smoke backflow adjustable valve is 15%
~50%；
3), each equipment of system operates normally, and by manually adjusting each valve opening degree, and cooperates air blower, air-introduced machine
Variable frequency adjustment, it is ensured that smoke backflow amount and fresh-air volume are according to 15%-35% ratio；
4), by manually adjusting the aperture of each valve, by being provided with O in detection flue gas in chimney2、CO、NOxComposition is dense
The sensor of degree determines the O of combustion apparatus discharge2、NOxThe attainable minimum value of content, and in the controller of DCS control system
Upper setting O2、NOxThe target value of content is arranged；
5) arrangement above switching system, is completed to automatic operating state, is completed to O in kiln2, while to NO in flue gasxIt is low
The control of discharge capacity.
The invention has the advantages that
It 1, can be with after tunnel stove low nitrogen burning system of the present invention is mixed fresh air, backflow flue gas in wind-mixer
According to actual working environment demand, the temperature of mixing wind is adjusted；
2, the air quantity of mixing wind can individually can be adjusted one according to actual working environment demand in mixer of the present invention
A or multiple mixed air volume control valves give the partly or wholly adjustment of mixing wind as far as possible, are conducive to low nitrogen burning progress；
3, DCS control system of the present invention receives O in flue gas2、CO、NOxTemperature data in components and concentration data, mixing chamber,
The each control valve of comprehensive adjustment, air blower, air-introduced machine, heating device etc. realize O in kiln2Control, further to NOx arrange
Accurate control high-volume；
4, whole system of the present invention can be manually controlled and also be can be automatically operated, and automatic running realizes on line real-time monitoring,
Ensure the safety and stability of system operation；
5, stove low nitrogen burning of the present invention, short time limit, operating cost is low, and small investment is compared with tradition, short time limit 60%, fortune
Row cost decline 50~80%.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is wind-mixer structural schematic diagram of the invention.
Fig. 3 is the right view of Fig. 2.
Fig. 4 is the DCS control system functional block diagram of invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Firstly, describing stove low nitrogen burning system in tunnel according to the present invention, the low nitrogen combustion of the tunnel stove with reference to Fig. 1-4
Burning system includes stove 1, and feed inlet 2, discharge port 3 is respectively set in 1 left and right sides of stove, setting chimney 4 on the right side of stove 1, in chimney 4
It is provided with the O of components and concentration in detection flue gas2Sensor 5, CO sensor 6, NOxSensor 7,1 bottom air inlet mouth of stove are equipped with
Wind-mixer, wind-mixer are case structure, cabinet 24 have in be provided with upper spacer 8, lower clapboard 9, lower clapboard 9 and cabinet front plate,
It is equipped with gap between 1 back side panel of upper spacer 8 and cabinet and constitutes flow channels 10, cabinet is divided into three by upper spacer 8, lower clapboard 9
Layer, cabinet are followed successively by smoke backflow chamber 11, fresh air chamber 12, Hybrid Heating chamber 13 from bottom to top, in Hybrid Heating chamber
Equipped with heating device 14 and temperature sensor 15, cabinet upper end has multiple mixing air pipings 16, in each mixing air piping 16
It is mounted on mixed air volume control valve 17.
Wind-mixer cabinet fresh air chamber 11, smoke backflow chamber 12 respectively with fresh air pipeline 18, smoke backflow pipeline 19
It is logical, fresh-air volume regulating valve 20 is wherein installed on fresh air pipeline 18 and connects air blower 21 in pipe end；Smoke backflow pipe
Smoke backflow adjustable valve 22, air-introduced machine 23 are sequentially installed on road 19.
It further include having DCS control system 25, mixed air volume control valve 17, fresh-air volume regulating valve 20, smoke backflow amount tune
Section valve 22 is electrically connected with the controller 26 of DCS control system, detects O in flue gas2、CO、NOxThe O of components and concentration2Concentration sensor
5, CO concentration sensor 6, NOxIt is anti-that temperature sensor 15 in concentration sensor 7, Hybrid Heating chamber 13 will acquire data respectively
The controller 26 for DCS control system of feeding, controller 26 issue control instruction and control mixed air volume control valve 17, fresh-air volume tune
Section valve 20, smoke backflow adjustable valve 22, heating device 14, air-introduced machine 23, air blower 21 work.
There is a sieve plate 27 close to smoke backflow Pipe installing in smoke backflow chamber 12, sieve plate 27 is by smoke backflow chamber
Front side is divided into filtering chamber 28.
On the air inlet 29 of fresh air chamber 11, the 30 cabinet right side plate of air inlet of smoke backflow chamber, fresh air chamber 11
Air inlet 29 is close to cabinet front plate, and the air inlet 30 of smoke backflow chamber is close to cabinet back side panel.
A shaft 31 is respectively set in smoke backflow chamber 12, fresh air chamber 11,31 outer wall of shaft has helical blade
32, two both ends of the shaft are installed on the left side plate of cabinet, and two shafts are returned with the air inlet, flue gas of fresh air on cabinet respectively
Flow chamber air inlet central coaxial.
Hybrid Heating chamber inner heating device 14 is electric heater unit or steam heater.
In addition, the present invention also provides a kind of combustion methods of above-mentioned tunnel stove low nitrogen burning system, including walk as follows
Suddenly,
1), debugging and detection system fault-free, activation system manually adjust mixed air volume control valve 17, fresh-air volume tune
The minimum of valve 20, smoke backflow adjustable valve 22 is saved to maximum opening, and be arranged respectively on the controller of DCS control system 26
Maximum opening, while adjust air blower 21,23 working frequency of air-introduced machine minimum to maximum, determine setting maximum functional frequency
Rate；
2) mixed air volume control valve, fresh-air volume regulating valve, the aperture of smoke backflow adjustable valve, mixed air volume control are adjusted
Valve opening processed is 100%, and the aperture of fresh-air volume regulating valve is 70%~85%, and the aperture of smoke backflow adjustable valve is 15%
~50%；
2), each equipment of system operates normally, and by manually adjusting each valve opening degree, and cooperates air blower 21, air-introduced machine
23 variable frequency adjustment, it is ensured that smoke backflow amount and fresh-air volume are according to 15%-35% ratio；
3), by manually adjusting the aperture of each valve, by being provided with O in detection flue gas in chimney2、NOxComponents and concentration
Sensor determines the O of combustion apparatus discharge2、NOxThe attainable minimum value of content, and set on the controller of DCS control system
Set O2、NOxThe target value of content is arranged；
4) arrangement above switching system, is completed to automatic operating state, is completed to O in kiln2, while to NO in flue gasxIt is low
The control of discharge capacity.
Preferable specific embodiment of the invention is described in detail above.It should be appreciated that those skilled in the art
It according to the present invention can conceive without creative work and make many modifications and variations.Therefore all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical solution, all should be within the scope of protection determined by the claims.
Claims (6)
1. feed inlet, discharge port, stove is respectively set in a kind of tunnel stove low nitrogen burning system, including stove, stove left and right sides
Chimney is arranged in right side, and O in detection flue gas is provided in chimney2、CO、NOxThe sensor of components and concentration, which is characterized in that the furnace
Kiln bottom portion air inlet is equipped with wind-mixer, and the wind-mixer is case structure, is provided with upper spacer, lower clapboard in cabinet, under every
It is equipped with gap between plate and cabinet front plate, upper spacer and cabinet back side panel and constitutes flow channels, upper spacer, lower clapboard are by cabinet
Three layers are divided into, cabinet is followed successively by smoke backflow chamber, fresh air chamber, Hybrid Heating chamber, Hybrid Heating chamber from bottom to top
Interior to be equipped with heating device and temperature sensor, cabinet upper end has multiple mixing air pipings, is respectively mounted in each mixing air piping
There is mixed air volume control valve；
Wind-mixer cabinet fresh air chamber, smoke backflow chamber respectively with fresh air pipeline, smoke backflow pipeline connection, wherein fresh wind tube
Fresh-air volume regulating valve is installed on road and connects air blower in pipe end；Flue gas is sequentially installed on smoke backflow pipeline to return
Flow control valve, air-introduced machine；
It further include having DCS control system, the mixed air volume control valve, the fresh-air volume regulating valve, the smoke backflow amount
Regulating valve is electrically connected with the controller of DCS control system, O in the detection flue gas2、CO、NOxIt is the sensor of components and concentration, described
The indoor temperature sensor of Hybrid Heating chamber will acquire data feedback to the controller of the DCS control system, the control respectively
Device processed is for controlling mixed air volume control valve, fresh air adjustable valve, smoke backflow adjustable valve, heating device, air-introduced machine, air blast
The working condition of machine.
2. stove low nitrogen burning system in tunnel according to claim 1, which is characterized in that in the smoke refluxing chamber room
There is sieve plate close to smoke backflow Pipe installing, sieve plate will be divided into filtering chamber on front side of smoke backflow chamber.
3. stove low nitrogen burning system in tunnel according to claim 1, which is characterized in that the air inlet of the fresh air chamber
Mouthful, on the air inlet cabinet right side plate of smoke backflow chamber, the air inlet of fresh air chamber is close to cabinet front plate, smoke refluxing chamber
The air inlet of room is close to cabinet back side panel.
4. stove low nitrogen burning system in tunnel according to claim 1, which is characterized in that the smoke backflow chamber,
A shaft is respectively set in fresh air chamber, shaft outer wall has helical blade, and two both ends of the shaft are installed on the left and right of cabinet
On side plate, two shafts respectively with the air inlet of fresh air, smoke backflow chamber air inlet central coaxial on cabinet.
5. stove low nitrogen burning system in tunnel according to claim 1, which is characterized in that in the Hybrid Heating chamber
Heating device is electric heater unit or steam heater.
6. a kind of combustion method using stove low nitrogen burning system in tunnel described in claim 1, which is characterized in that including as follows
Step,
1), debugging and detection system fault-free, activation system manually adjust mixed air volume control valve, fresh-air volume regulating valve, cigarette
Respective maximum opening is arranged to maximum opening in the minimum of gas reflux adjustable valve on the controller of DCS control system, together
When adjust air blower, air-introduced machine working frequency minimum to maximum, determine be arranged maximum operation frequency；
2) mixed air volume control valve, fresh-air volume regulating valve, the aperture of smoke backflow adjustable valve, mixed air volume control, are adjusted
Valve opening is 100%, and the aperture of fresh-air volume regulating valve is 70%~85%, the aperture of smoke backflow adjustable valve is 15%~
50%；
3), each equipment of system operates normally, and by manually adjusting each valve opening degree, and cooperates the frequency conversion of air blower, air-introduced machine
It adjusts, it is ensured that smoke backflow amount and fresh-air volume are according to 15%-35% ratio；
4), by manually adjusting the aperture of each valve, by being provided with O in detection flue gas in chimney2, CO, NOx component concentration
Sensor determines the O of combustion apparatus discharge2、NOxThe attainable minimum value of content, and set on the controller of DCS control system
Set O2、NOxThe target value of content is arranged；
5) arrangement above switching system, is completed to automatic operating state, is completed to O in kiln2, while to NO in flue gasxLow discharge capacity
Control.
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| CN201910675528.1A CN110296601B (en) | 2019-07-25 | 2019-07-25 | Low-nitrogen combustion system of tunnel kiln |
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| CN201910675528.1A CN110296601B (en) | 2019-07-25 | 2019-07-25 | Low-nitrogen combustion system of tunnel kiln |
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