CN201053675Y - Gas reburning burner - Google Patents

Gas reburning burner Download PDF

Info

Publication number
CN201053675Y
CN201053675Y CNU2007200716040U CN200720071604U CN201053675Y CN 201053675 Y CN201053675 Y CN 201053675Y CN U2007200716040 U CNU2007200716040 U CN U2007200716040U CN 200720071604 U CN200720071604 U CN 200720071604U CN 201053675 Y CN201053675 Y CN 201053675Y
Authority
CN
China
Prior art keywords
gas
venturi tube
reburning
pressure
burner
Prior art date
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.)
Expired - Fee Related
Application number
CNU2007200716040U
Other languages
Chinese (zh)
Inventor
仇中柱
潘卫国
任建兴
王文环
李芃
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai University of Electric Power
University of Shanghai for Science and Technology
Original Assignee
Shanghai University of Electric Power
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shanghai University of Electric Power filed Critical Shanghai University of Electric Power
Priority to CNU2007200716040U priority Critical patent/CN201053675Y/en
Application granted granted Critical
Publication of CN201053675Y publication Critical patent/CN201053675Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

The utility model relates to a gas reburning burner which comprises a casing, a gas joint and a flange. The utility model is characterized in that a venturi tube is arranged inside the casing, and consists of a tapered segment, a mixed segment and a diffuser; a gas chamber is formed between the casing and the venturi tube; a junction of the upstream of the mixed segment and the tapered segment of the venturi tube is provided with an air inlet ring; gas in the gas chamber enters into the venturi tube from the air inlet ring and mixes with high pressure steam. The utility model is simple in structure, firm, durable and has a long service life; the gas pressure application scope of the gas reburning burner can be wide caused by the negative pressure produced by the venturi tube, and the gas reburning burner can operate with gas of high pressure, medium pressure or low pressure; the high pressure steam carrier can guarantee that the reburning fuel is sufficiently and uniformly mixed with the flue gas from the upstream, and guarantee the effect that the NOX emission is reduced by reburning.

Description

The gas reburning burner
Technical field
The utility model relates to a kind of gas burner, the burner that burns again in especially a kind of stove.
Background
Current mankind is faced with resource, environment and population three big problems, and the environmental problem that causes of the energy is quite serious in recent years.Wherein nitrogen oxide be atmosphere pollution mainly contain one of harmful substances.China's energy is based on coal, and the coal-fired atmosphere pollution that is produced accounts for the large percentage of gross contamination emission, and wherein nitrogen oxide accounts for 67%.
Combustion technology belongs to the combustion technology of low NOx again.Combustion technology (ReburningTechology) is also referred to as fuel staging (district) combustion technology in the stove again.Promptly burner hearth is divided into main combustion zone, reburning zone, three districts of burning-out zone, the fuel of 80%-85% is sent into main combustion zone, burning and generation NOx under the condition of excess air coefficient α>1, the fuel of sending into main combustion zone is called main fuel, there is excess air main combustion zone, is oxidizing atmosphere.The fuel of all the other 15%-20% is sent into the combustion zone again that is in top, main combustion zone, forms very strong reducing atmosphere under the condition of α<1, makes the NOx that generates in main combustion zone be reduced into nitrogen molecular (N in the combustion zone again 2), the fuel of sending into the reburning zone claims reburning fuel, the NOx that has not only generated in the reburning zone obtains reduction, also can suppress new NOx simultaneously and generate, and the concentration of emission of NOx is further reduced.At last, combustion product enters burning-out zone, sends into after-flame wind (OFA), reaches final completing combustion purpose.Can regenerate minor N O in the after-flame process, but as a whole, use in the stove again combustion technology after, the final NOx discharge capacity of coal-powder boiler can adopt low-NOx combustor to reduce on the basis of NOx growing amount in main combustion zone, reduce the discharge capacity of 50%-70% again.Therefore, adopt this technology, the NOx discharge capacity is controlled at below the 200mg/Nm3 can be realized.
A large amount of studies show that: various hydrocarbon gas fuel such as natural gas are better, the most widely used reburning fuels of present effect.
Existing recombustion burner, because the large-sized station boiler combustion space is big, and the reburning fuel flow is little, can't make reburning fuel have enough momentum, forms strong disturbance in burner hearth, is distributed in the reburning zone full and uniformly, to guarantee that combustion reduces NOx again.
Summary of the invention
The utility model is will solve recombustion burner to fire the technical problem that reduces the NOx discharging again, and provide a kind of gas reburning burner, this gas reburning burner can guarantee that the flue gas that comes in reburning fuel and upstream is abundant, evenly mix, and guarantees that combustion again reduces the effect of NOx discharging.
For achieving the above object, the technical solution adopted in the utility model is: a kind of gas reburning burner, comprise housing, gas joint, flange, be characterized in: housing is built-in with Venturi tube, Venturi tube is made up of converging transition, mixer, diffuser, form the combustion gas cavity between housing and the Venturi tube, be provided with an air inlet ring at the mixer upstream and the converging transition joint of Venturi tube, the combustion gas in the combustion gas air cavity enters Venturi tube from the air inlet ring and mixes with high-pressure steam.
Gas joint be arranged on Venturi tube mixer housing of living in above; Flange is arranged on the converging transition opening part and the housing front end of Venturi tube.
The beneficial effects of the utility model are: the gas reburning burner structure is simple, firm, durable, the life-span is long; The negative pressure that Venturi tube produces makes that gas reburning burner gaseous-pressure is applied widely, and the combustion gas of supply high, medium and low voltage all can move; The high-pressure steam carrier can guarantee that the flue gas that comes in reburning fuel and upstream is abundant, evenly mix, and guarantees that combustion again reduces the effect of NOx discharging.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
As shown in Figure 1, gas reburning burner of the present utility model comprises housing 1, gas joint 3, flange 4, Venturi tube 2.
Housing 1 is centered around the outside of Venturi tube 2, is combustion gas cavity 5 between housing 1 and the Venturi tube 2.Venturi tube 2 is made up of converging transition 6, mixer 7, diffuser 8.Upstream and converging transition 6 joints at mixer 7 have an air inlet ring 9, and combustion gas enters in the combustion gas cavity 5 by gas joint 3, enters Venturi tube 2 from air inlet ring 9 then and mixes with high-pressure steam.
Gas joint 3 be arranged on Venturi tube 2 mixer 7 housings 1 of living in above; Flange 4 is arranged on converging transition 6 opening parts and housing 1 front end of Venturi tube 2.
The gas reburning burner is made of heat-resisting alloy steel.The gas reburning burner structure is simple, firm, durable, the life-span is long; The negative pressure that Venturi tube produces makes that gas reburning burner gaseous-pressure is applied widely, and the combustion gas of supply high, medium and low voltage all can move.
The utility model is carrier with the high-pressure water vapor, structure by burner is evenly mixed reburning fuel with steam, utilize the momentum of high-pressure steam in boiler, to produce strong disturbance, can guarantee that the flue gas that comes in reburning fuel and upstream is abundant, evenly mix, guarantee that combustion again reduces the effect of NOx discharging.

Claims (3)

1. gas reburning burner, comprise housing (1), gas joint (3), flange (4), it is characterized in that, described housing (1) is built-in with Venturi tube (2), Venturi tube (2) is made up of converging transition (6), mixer (7), diffuser (8), form combustion gas cavity (5) between housing (1) and the Venturi tube (2), mixer (7) upstream and converging transition (6) joint in Venturi tube (2) are provided with an air inlet ring (9), and the combustion gas in the combustion gas cavity (5) enters Venturi tube (2) from air inlet ring (9) and mixes with high-pressure steam.
2. gas reburning burner according to claim 1 is characterized in that, described gas joint (3) be arranged on Venturi tube (2) mixer (7) housing of living in (1) above,
3. gas reburning burner according to claim 1 is characterized in that, described flange (4) is arranged on converging transition (6) opening part and housing (1) front end of Venturi tube (2).
CNU2007200716040U 2007-06-26 2007-06-26 Gas reburning burner Expired - Fee Related CN201053675Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2007200716040U CN201053675Y (en) 2007-06-26 2007-06-26 Gas reburning burner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2007200716040U CN201053675Y (en) 2007-06-26 2007-06-26 Gas reburning burner

Publications (1)

Publication Number Publication Date
CN201053675Y true CN201053675Y (en) 2008-04-30

Family

ID=39393338

Family Applications (1)

Application Number Title Priority Date Filing Date
CNU2007200716040U Expired - Fee Related CN201053675Y (en) 2007-06-26 2007-06-26 Gas reburning burner

Country Status (1)

Country Link
CN (1) CN201053675Y (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102009755A (en) * 2010-09-17 2011-04-13 燕京啤酒(桂林漓泉)股份有限公司 Gas heat film machine
CN102980191A (en) * 2013-01-04 2013-03-20 康广民 Negative pressure type high temperature burner
CN103277795A (en) * 2013-05-27 2013-09-04 中国科学院广州能源研究所 Gas burner capable of adjusting gas to be self-recycling
CN107676981A (en) * 2017-08-31 2018-02-09 芜湖鸣人热能设备有限公司 Water heater venturi mixer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102009755A (en) * 2010-09-17 2011-04-13 燕京啤酒(桂林漓泉)股份有限公司 Gas heat film machine
CN102980191A (en) * 2013-01-04 2013-03-20 康广民 Negative pressure type high temperature burner
CN103277795A (en) * 2013-05-27 2013-09-04 中国科学院广州能源研究所 Gas burner capable of adjusting gas to be self-recycling
CN103277795B (en) * 2013-05-27 2015-05-20 中国科学院广州能源研究所 Gas burner capable of adjusting gas to be self-recycling
CN107676981A (en) * 2017-08-31 2018-02-09 芜湖鸣人热能设备有限公司 Water heater venturi mixer

Similar Documents

Publication Publication Date Title
CN103968373A (en) Pulverized coal oxygen-rich combustion method and system
CN100422636C (en) Low NOx oil gun device heated by backheating
CN201053675Y (en) Gas reburning burner
CN101050853B (en) Method for reducing nitrogen oxide of powder coal boiler mixed burning gas fuel
CN102519037B (en) Plasma oil-free ignition combustor
CN104832918A (en) Novel cyclone bias pulverized coal burner
CN104180368A (en) Medium-and-low temperature hot fume powder feeding type coal powder combustion device and combustion process thereof
CN2735175Y (en) Multiphase cofiring low nitrogen oxide combustor
CN205746802U (en) Station boiler uses cyclone cylinder classification to realize the system of fuel denitration by refueling
CN102705818B (en) Wall-attached wind distribution method of boiler combustor
CN1226552C (en) Low Nox combustor with mixed coal and gas fuel
CN108679599B (en) Oxygen-enriched combustion method for mixing pulverized coal with biomass
CN203099812U (en) Airfoil blade flow guide rich-lean pulverized coal burner
CN205782858U (en) A kind of cyclone gasification burning premix burner
CN205137462U (en) A many fuel combustor for wind channel heating
CN204478025U (en) Fire coal boiler fume two-phase method denitrification apparatus
CN201944836U (en) Stable-combusting environment-friendly direct current pulverized coal burner
CN201396776Y (en) Oxygen-enriched air mixed-blowing combustion improver boiler energy-saving device
CN2929483Y (en) Pre-heating type concentration and thin direct flow coal powder burner
CN203533549U (en) Micro-oil ignition and oxygen adding burner
CN204165042U (en) Middle Low Temperature Thermal flue gas powder feeding coal powder burner
CN105889904A (en) Method for reducing nitrogen oxides of pulverized coal boiler mixed combustion gas fuel
CN105351963A (en) Low-nitrogen combustion device based on brown coal
CN105841142A (en) Efficient low-heating-value gas combustion boiler
CN209977990U (en) Low-nitrogen full-premixing steam boiler

Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20080430

Termination date: 20120626

C17 Cessation of patent right