CN110173692A - A kind of ultralow nitrogen combustion system for fuel gas with low heat value - Google Patents
A kind of ultralow nitrogen combustion system for fuel gas with low heat value Download PDFInfo
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- CN110173692A CN110173692A CN201910459309.XA CN201910459309A CN110173692A CN 110173692 A CN110173692 A CN 110173692A CN 201910459309 A CN201910459309 A CN 201910459309A CN 110173692 A CN110173692 A CN 110173692A
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- flame stabilization
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 64
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 239000002737 fuel gas Substances 0.000 title claims abstract description 49
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 29
- 238000005338 heat storage Methods 0.000 claims abstract description 42
- 230000006641 stabilisation Effects 0.000 claims abstract description 42
- 238000011105 stabilization Methods 0.000 claims abstract description 42
- 239000007789 gas Substances 0.000 claims abstract description 41
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000003546 flue gas Substances 0.000 claims abstract description 19
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 16
- 239000007921 spray Substances 0.000 claims abstract description 14
- 239000000567 combustion gas Substances 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 235000019504 cigarettes Nutrition 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 15
- 239000000446 fuel Substances 0.000 abstract description 11
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract description 5
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 abstract description 3
- 230000000149 penetrating effect Effects 0.000 abstract description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000010531 catalytic reduction reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 210000000038 chest Anatomy 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000001535 kindling effect Effects 0.000 description 1
- 238000012423 maintenance 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
- 239000003345 natural gas Substances 0.000 description 1
- 210000004894 snout Anatomy 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
- F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
- F23D14/24—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other at least one of the fluids being submitted to a swirling motion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
- F23D2900/14—Special features of gas burners
- F23D2900/14002—Special features of gas burners of premix or non premix types, specially adapted for the combustion of low heating value [LHV] gas
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The present invention relates to ultralow nitrogen technical field of combustion equipment, more particularly to a kind of ultralow nitrogen combustion system for fuel gas with low heat value, including burner, gas pipeline, combustion-supporting air piping, heat storage and flame stabilization room, boiler furnace, boiler back end ductwork, chimney, circulating flue gas pipeline and combustion fan；Compared with prior art, do not depend on high heating value combustion gas light a fire with it is combustion-supporting, can be realized fuel gas with low heat value direct-fire and stablize burning；Using grading combustion technology, fuel NO generation can be effectively suppressed, the nitrogen oxides of burner outlet is controlled in reduced levels；The heat storage and flame stabilization room of burner outlet is disposed with denitrfying agent pipeline, is sufficiently mixed the NOx of burning generation and the denitrfying agent of spray gun penetrating, fast reaction, can get the denitration efficiency of 50-60%.The ultralow nitrogen combustion system of the fuel gas with low heat value has the characteristics that simple structure, compact layout, easy to maintain, investment operating cost is low, can realize ultralow discharged nitrous oxides steadily in the long term.
Description
Technical field
The present invention relates to ultralow nitrogen technical field of combustion equipment, and in particular to the super low nitrogen burning system for fuel gas with low heat value
System.
Background technique
Current environmental protection policy is increasingly stringent, the either high heating value gaseous fuels such as burning natural gas, or burning blast furnace coal
The low calorific value gas fuels such as gas, the nitrous oxides concentration in flue gas are both needed to meet minimum discharge guarantee, i.e. NOx emission concentration is low
In 50mg/Nm3, even lower than 30mg/Nm3.For fuel gas with low heat value of the calorific value lower than 10MJ/m3, since its kindling is tired
The reasons such as hardly possible, combustion instability, burnout velocity be slow, generally use the means such as centralized supply wind, oxygen-enriched combusting to ensure flameholding
Property and burn-up efficiency, are difficult really to realize low nitrogen burning.
At present in the low heat value gas combustion burner of operation, NOx emission concentration generally in 100-150mg/Nm3 or so, with
Minimum discharge standard is apart from each other.SNCR spray gun is installed additional in boiler furnace according to selective non-catalytic reduction, by
It is limited in reaction in furnace temperature range, gas residence time is shorter, denitrfying agent is not reacted sufficiently with nitrogen oxides, denitration
Efficiency only has 40% or so, is unable to reach minimum discharge requirement；According to SCR selective catalytic reduction in boiler tail
SCR reactor is installed in portion, although its denitration efficiency height can reach minimum discharge requirement, initial cost cost and operating cost
It is all higher.
Summary of the invention
It is an object of the invention to aiming at the shortcomings in the prior art, provide a kind of ultralow nitrogen for fuel gas with low heat value
Combustion system.Purpose be for the low calorific value gas fuels such as blast furnace gas, coal gas of converter and producer gas, by low nitrogen burning and
The new combustion systems that selective non-catalytic reduction denitration is integrated in one, before guaranteeing combustion stability and high burn-up efficiency
It puts, realizes that NOx emission concentration is even lower than the minimum discharge standard of 30mg/Nm3 lower than 50mg/Nm3.
The purpose of the present invention is achieved through the following technical solutions: the application provides a kind of ultralow nitrogen for fuel gas with low heat value
Combustion system, including burner, gas pipeline, combustion-supporting air piping, heat storage and flame stabilization room, boiler furnace, boiler back end ductwork, cigarette
Chimney, circulating flue gas pipeline and combustion fan；Boiler furnace is sequentially communicated boiler back end ductwork and chimney；Gas pipeline and combustion air
Pipeline is connected to the inlet end of burner respectively, and the outlet side of burner is connected to heat storage and flame stabilization room, heat storage and flame stabilization room and boiler
Burner hearth connection；The side of heat storage and flame stabilization room is provided with and communicated with multiple denitrfying agent pipelines, and each denitrfying agent pipeline is communicated with out of stock
Spray gun；The air outlet of combustion fan is connected to combustion-supporting air piping, the air inlet of combustion fan respectively with circulating flue gas pipeline and sky
Feed channel connection, circulating flue gas pipeline are connected to boiler back end ductwork, and air pipeline is communicated with the atmosphere.
Wherein, circulating flue gas pipeline is provided with regulating valve.
Wherein, burner includes the center exhaust gas nozzle, annular fuel gas jet pipe and burning being successively arranged concentrically from the inside to the outside
Device shell, the center exhaust gas nozzle and annular fuel gas jet pipe are that interval is arranged and surrounds jointly inner second air spout, annular combustion
There are gap and outer second air spout is surrounded between gas blowout pipe and burner housing.
Wherein, gas pipeline is connected to center exhaust gas nozzle and annular fuel gas jet pipe respectively, combustion-supporting air piping respectively with it is interior
Overfire air port and outer second air spout connection.
Wherein, center is installed in front of the exhaust gas nozzle of center and surely fires cylinder, center is surely fired cylinder and is connected to combustion-supporting air piping.
Wherein, burning torch is provided in the exhaust gas nozzle of center
Wherein, along the direction that combustion gas sprays, the distance between center exhaust gas nozzle and heat storage and flame stabilization room, inner second air spout
The distance between the distance between heat storage and flame stabilization room, annular fuel gas jet pipe and heat storage and flame stabilization room and outer second air spout and accumulation of heat
The distance between stable burning room gradually reduces.
Wherein, the diameter value of heat storage and flame stabilization room is 1.0m-4.0m.
Wherein, the length value of heat storage and flame stabilization room is 0.5m-2.0m.
Wherein, the inner surface of heat storage and flame stabilization room has laid fire resisting and has poured material.
Beneficial effects of the present invention: compared with prior art, the combustion system of the application uses heat storage and flame stabilization technology, disobeys
Rely high heating value combustion gas come light a fire with it is combustion-supporting, can be realized fuel gas with low heat value direct-fire and stablize burning；Burner centre design
There is steady combustion cylinder, ignition success rate and combustion flame continuity can be improved；Burner outlet design has heat storage and flame stabilization room, fully absorbs
Combustion flame radiant heat is to improve burner region temperature, realize flameholding and high burn-off rate；Using grading combustion technology, combustion
Material and combustion air classification are sent into stage by stage, and the chemical equivalent of fuel gas buring overall process can be effectively controlled, inhibit fuel type nitrogen oxidation
Object generates, and the nitrogen oxides of burner outlet is controlled the reduced levels in 50-70mg/Nm3；The heat storage and flame stabilization of burner outlet
Room is disposed with denitrfying agent pipeline and spray gun, is sufficiently mixed the NOx of burning generation and the denitrfying agent of spray gun penetrating, fast reaction,
It can get the denitration efficiency of 50-60%.The ultralow nitrogen combustion system of the fuel gas with low heat value simple, compact layout, maintenance with structure
Feature convenient, investment operating cost is low, can realize ultralow discharged nitrous oxides steadily in the long term.
Detailed description of the invention
The present invention will be further described with reference to the accompanying drawings, but the embodiment in attached drawing is not constituted to any limit of the invention
System, for those of ordinary skill in the art, without creative efforts, can also obtain according to the following drawings
Other attached drawings.
Fig. 1 is flow chart of the present embodiment for the ultralow nitrogen combustion system of fuel gas with low heat value.
Fig. 2 is structural schematic diagram of the present embodiment for the burner of the ultralow nitrogen combustion system of fuel gas with low heat value.
Detailed description of the invention: burner 1, gas pipeline 2, combustion-supporting air piping 3, heat storage and flame stabilization room 4, denitrfying agent pipeline 5, Boiler Furnace
Thorax 6, boiler back end ductwork 7, chimney 8, circulating flue gas pipeline 9, regulating valve 10, air pipeline 11, combustion fan 12, center combustion gas
Cylinder 201, inner second air spout 202, outer second air spout 203, burning torch are surely fired in jet pipe 101, annular fuel gas jet pipe 102, center
301, denitration spray gun 401, castable 501.
Specific embodiment
The invention will be further described with the following Examples.
A kind of specific embodiment of ultralow nitrogen combustion system for fuel gas with low heat value of the invention, as shown in Figure 1, its
Structure includes burner 1, gas pipeline 2, combustion-supporting air piping 3, heat storage and flame stabilization room 4, boiler furnace 6, boiler back end ductwork 7, cigarette
Chimney 8, circulating flue gas pipeline 9 and combustion fan 12.Specifically, boiler furnace 6 is sequentially communicated boiler back end ductwork 7 and chimney 8；Combustion
Feed channel 2 and combustion-supporting air piping 3 are connected to the inlet end of burner 1 respectively, and the outlet side and heat storage and flame stabilization room 4 of burner 1 connect
Logical, heat storage and flame stabilization room 4 is connected to boiler furnace 6；The side of heat storage and flame stabilization room 4 is provided with and communicated with multiple denitrfying agent pipelines 5, each
Denitrfying agent pipeline 5 is communicated with out of stock spray gun 401；The air outlet of combustion fan 12 is connected to combustion-supporting air piping 3, combustion fan 12
Air inlet be connected to respectively with circulating flue gas pipeline 9 and air pipeline 11, circulating flue gas pipeline 9 is connected to boiler back end ductwork 7,
Air pipeline 11 is communicated with the atmosphere.Its working principles are as follows: the outlet flame (high-temperature flue gas) of burner 1 first passes through heat storage and flame stabilization
Room 4 enters back into boiler furnace 6 and exchanges heat with each heating surface, and the low-temperature flue gas after completing heat exchange is via boiler back end ductwork
7, chimney 8 is discharged into atmosphere.7 middle part of back-end ductwork is communicated with circulating flue gas pipeline 9, and circulating flue gas passes through regulating valve 10 and air hose
Air mixing in road 11, then burner 1 is sent into after being boosted by combustion fan 12.
In the present embodiment, circulating flue gas pipeline 9 is provided with regulating valve 10, enters burner by the way that regulating valve 10 is changeable
Circulating flue gas and air ratio, so as to adjust the oxygen content of combustion air, to obtain optimal low nitrogen burning effect.
See Fig. 2, burner 1 includes center exhaust gas nozzle 101, the annular fuel gas jet pipe being successively arranged concentrically from the inside to the outside
102 and burner housing, the center exhaust gas nozzle 101 and annular fuel gas jet pipe 102 are that interval is arranged and surrounds interior two jointly
Secondary wind snout 202 there are gap and surrounds outer second air spout 203 between annular fuel gas jet pipe 102 and burner housing.It should
, it is emphasized that the burner 1 of the application is to be respectively as follows: center exhaust gas nozzle 101, center from inside to outside using concentric structure
Steady combustion cylinder 201, inner second air spout 202, annular fuel gas jet pipe 102, outer second air spout 203.
See Fig. 2, gas pipeline 2 is connected to center exhaust gas nozzle 101 and annular fuel gas jet pipe 102 respectively, combustion-supporting air hose
Road 3 is connected to inner second air spout 202 and outer second air spout 203 respectively, wherein is installed in the front of center exhaust gas nozzle 101
There is center surely to fire cylinder 201, center is surely fired cylinder 201 and is connected to combustion-supporting air piping 3.Its course of work is as follows, and fuel gas with low heat value is by firing
Feed channel 2 is sent into center exhaust gas nozzle 101 and annular fuel gas jet pipe 102, combustion air surely fire cylinder by combustion-supporting 3 feeding center of air piping
201, inner second air spout 202 and outer second air spout 203.
In the present embodiment, burning torch 301 is provided in center exhaust gas nozzle 101.Center exhaust gas nozzle 101 and center are steady
It fires cylinder 201 to connect, required primary fuel of lighting a fire surely fires cylinder 201 and and combustion air into center by center exhaust gas nozzle 101
Mixing, the electric arc that burning torch 301 discharges are lighted, are sent into annular fuel gas jet pipe 102 in the outside diffusion process of combustion flame
Secondary fuel ignite.
As a preferred option, design is oriented to by several eddy flows in inner second air spout 202 and outer second air spout 203
Blade, the secondary fuel that combustion air is sent into a manner of rotating jet with annular fuel gas jet pipe 102 mix strongly, and combustion gas is replenished in time
Oxygen needed for burning.
In the present embodiment, in order to further increase combustion flame continuity and efficiency of combustion.Along combustion gas spray direction,
Between the distance between center exhaust gas nozzle 101 and heat storage and flame stabilization room 4, inner second air spout 202 and heat storage and flame stabilization room 4 away from
From the distance between, annular fuel gas jet pipe 102 and heat storage and flame stabilization room 4 between outer second air spout 203 and heat storage and flame stabilization room 4
Distance gradually reduces.
In the present embodiment, heat storage and flame stabilization room 4 is cylindrical structure, (the refractory casting material of pouring material 501 of inner surface laying
Material) thermal reservoir that fuel gas buring discharges is got up, which is maintained at 700-900 DEG C or so, to guarantee combustion gas fire
The stability of flame to realize that depth air classification, anoxycausis create conditions, and then effectively inhibits fuel NO raw
At, make burner outlet nitrogen oxides control 50-70mg/Nm3 reduced levels；In 4 border of heat storage and flame stabilization room, arrangement is de-
Nitre spray gun 401 and the denitrfying agent pipeline 5 being attached thereto, denitrfying agent and nitrogen oxides 700-900 DEG C at a temperature of it is quickly anti-
It answers, denitration efficiency reaches 50-60%.The diameter D of heat storage and flame stabilization room 4 depends on burner rated power heat load intensity, takes
Value range is 1.0-4.0m；Length L depends on gas flame length, value range 0.5-2.0m.
The combustion system of the present embodiment use heat storage and flame stabilization technology, do not depend on high heating value combustion gas light a fire with it is combustion-supporting
It realizes fuel gas with low heat value direct-fire and stablizes burning；Burner centre design has steady combustion cylinder, and ignition success rate and combustion can be improved
It makes a fire flame continuity；Burner outlet design has heat storage and flame stabilization room, fully absorbs combustion flame radiant heat to improve burner region
Domain temperature realizes flameholding and high burn-off rate；Using grading combustion technology, fuel and combustion air classification are sent into stage by stage, can
The effectively chemical equivalent of control fuel gas buring overall process, inhibits fuel NO to generate, by the nitrogen oxidation of burner outlet
Object controls the reduced levels in 50-70mg/Nm3；The heat storage and flame stabilization room of burner outlet is disposed with denitrfying agent pipeline and spray gun, makes
Burn generate NOx and spray gun spray into denitrfying agent be sufficiently mixed, fast reaction, can get 50-60% denitration efficiency.This is low
The ultralow nitrogen combustion system of calorific value fuel gas has the characteristics that simple structure, compact layout, easy to maintain, investment operating cost is low, can
Ultralow discharged nitrous oxides are realized steadily in the long term.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than the present invention is protected
The limitation of range is protected, although explaining in detail referring to preferred embodiment to the present invention, those skilled in the art are answered
Work as understanding, it can be with modification or equivalent replacement of the technical solution of the present invention are made, without departing from the reality of technical solution of the present invention
Matter and range.
Claims (10)
1. a kind of ultralow nitrogen combustion system for fuel gas with low heat value, it is characterised in that: including burner (1), gas pipeline
(2), combustion-supporting air piping (3), heat storage and flame stabilization room (4), boiler furnace (6), boiler back end ductwork (7), chimney (8), circulating flue gas
Pipeline (9) and combustion fan (12)；
Boiler furnace (6) is sequentially communicated boiler back end ductwork (7) and chimney (8)；
Gas pipeline (2) and combustion-supporting air piping (3) are connected to the inlet end of burner (1) respectively, the outlet side of burner (1) with
Heat storage and flame stabilization room (4) connection, heat storage and flame stabilization room (4) are connected to boiler furnace (6)；
The side of heat storage and flame stabilization room (4) is provided with and communicated with multiple denitrfying agent pipelines (5), and each denitrfying agent pipeline (5) is communicated with
Out of stock spray gun (401)；
The air outlet of combustion fan (12) is connected to combustion-supporting air piping (3), the air inlet of combustion fan (12) respectively with circulation cigarette
Feed channel (9) is connected to air pipeline (11), and circulating flue gas pipeline (9) is connected to boiler back end ductwork (7), air pipeline (11)
It is communicated with the atmosphere.
2. the ultralow nitrogen combustion system according to claim 1 for fuel gas with low heat value, it is characterised in that: circulating flue gas pipe
Road (9) is provided with regulating valve (10).
3. the ultralow nitrogen combustion system according to claim 1 for fuel gas with low heat value, it is characterised in that: burner (1)
Including the center exhaust gas nozzle (101), annular fuel gas jet pipe (102) and burner housing being successively arranged concentrically from the inside to the outside, institute
It states center exhaust gas nozzle (101) and annular fuel gas jet pipe (102) and is arranged and surrounds jointly inner second air spout (202) for interval,
There are gap and outer second air spout (203) are surrounded between annular fuel gas jet pipe (102) and burner housing.
4. the ultralow nitrogen combustion system according to claim 3 for fuel gas with low heat value, it is characterised in that: gas pipeline
(2) be connected to respectively with center exhaust gas nozzle (101) and annular fuel gas jet pipe (102), combustion-supporting air piping (3) respectively with inner second air
Spout (202) is connected to outer second air spout (203).
5. the ultralow nitrogen combustion system according to claim 3 for fuel gas with low heat value, it is characterised in that: center gas injection
Center is installed in front of pipe (101) surely to fire cylinder (201), center is surely fired cylinder (201) and is connected to combustion-supporting air piping (3).
6. the ultralow nitrogen combustion system according to claim 3 for fuel gas with low heat value, it is characterised in that: center gas injection
Burning torch (301) are provided in pipe (101).
7. the ultralow nitrogen combustion system according to claim 3 for fuel gas with low heat value, it is characterised in that: sprayed along combustion gas
Direction, the distance between center exhaust gas nozzle (101) and heat storage and flame stabilization room (4), inner second air spout (202) and heat storage and flame stabilization
The distance between the distance between room (4), annular fuel gas jet pipe (102) and heat storage and flame stabilization room (4) and outer second air spout (203)
The distance between heat storage and flame stabilization room (4) gradually reduce.
8. the ultralow nitrogen combustion system according to claim 1 for fuel gas with low heat value, it is characterised in that: heat storage and flame stabilization room
(4) diameter value is 1.0m-4.0m.
9. the ultralow nitrogen combustion system according to claim 1 for fuel gas with low heat value, it is characterised in that: heat storage and flame stabilization room
(4) length value is 0.5m-2.0m.
10. the ultralow nitrogen combustion system according to claim 1 for fuel gas with low heat value, it is characterised in that: heat storage and flame stabilization
The inner surface of room (4) has laid fire resisting and has poured material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910459309.XA CN110173692A (en) | 2019-05-29 | 2019-05-29 | A kind of ultralow nitrogen combustion system for fuel gas with low heat value |
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| CN201910459309.XA CN110173692A (en) | 2019-05-29 | 2019-05-29 | A kind of ultralow nitrogen combustion system for fuel gas with low heat value |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113230881A (en) * | 2021-05-12 | 2021-08-10 | 内蒙古科技大学 | Two-stage denitration method in coal-fired high-temperature furnace |
| CN114151816A (en) * | 2021-12-09 | 2022-03-08 | 华中科技大学 | Combustion method and system for realizing energy conservation and low nitrogen emission of gas industrial boiler |
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