CN116906904A - Gas-liquid multi-fuel integrated burner - Google Patents

Gas-liquid multi-fuel integrated burner Download PDF

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Publication number
CN116906904A
CN116906904A CN202310633224.5A CN202310633224A CN116906904A CN 116906904 A CN116906904 A CN 116906904A CN 202310633224 A CN202310633224 A CN 202310633224A CN 116906904 A CN116906904 A CN 116906904A
Authority
CN
China
Prior art keywords
air pipe
air
exhaust gas
gas spray
spray guns
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.)
Pending
Application number
CN202310633224.5A
Other languages
Chinese (zh)
Inventor
王杜佳
杨章宁
李季梅
徐磊
谢佳
苏虎
鲁佳易
张山鹰
潘绍成
莫春鸿
李维成
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.)
Dongfang Boiler Group Co Ltd
Original Assignee
Dongfang Boiler Group Co Ltd
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 Dongfang Boiler Group Co Ltd filed Critical Dongfang Boiler Group Co Ltd
Priority to CN202310633224.5A priority Critical patent/CN116906904A/en
Publication of CN116906904A publication Critical patent/CN116906904A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D17/00Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel
    • F23D17/002Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel gaseous or liquid fuel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23LSUPPLYING 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
    • F23L9/00Passages or apertures for delivering secondary air for completing combustion of fuel 

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)

Abstract

The invention discloses a gas-liquid multi-fuel integrated burner, which comprises an air box, a fan, a central air pipe penetrating through the rear end of the air box, a primary air pipe sleeved outside the central air pipe, a secondary air pipe, a tertiary air pipe and a compact burnout air pipe, wherein the air box is provided with a plurality of air inlets; a waste liquid spray gun is arranged in the central air pipe, and a flame stabilizer is arranged in the front end of the primary air pipe outside the central air pipe; more than two primary air exhaust gas spray guns, secondary air exhaust gas spray guns and tertiary air exhaust gas spray guns all penetrate through the rear end of the bellows, and an ignition device sleeve and an ignition device are arranged in the primary air pipe; the front end of the secondary air pipe is internally provided with a secondary air orifice plate, and the front ends of the secondary air waste gas spray guns all penetrate through the secondary air orifice plate; swirl blades are arranged in the tertiary air pipe; the invention has the advantages of simple structure, easy arrangement, low cost, stable and efficient combustion of each fuel, control of NOx emission, guarantee of burnout rate of various fuels, adaptability to positive pressure operation of a hearth and wide market application prospect.

Description

Gas-liquid multi-fuel integrated burner
Technical Field
There are a large number of different kinds of combustible gas and liquid in industries such as petroleum, chemical industry, pharmacy, printing, etc., if these waste gas, waste liquid are directly discharged into the environment, can produce huge harm to the environment, also can cause the energy waste. With further improvement of pollutant emission indexes, high-efficiency and environment-friendly treatment of waste gas and waste liquid is facing serious challenges, and how to efficiently clean and treat the waste gas and waste liquid is also an important factor for limiting the development of chemical enterprises.
At present, the technical routes for treating various waste gases and waste liquids in the market are more, wherein one of the technical routes is used for treating different fuels by arranging different combustors, but if independent combustors are arranged according to each gas or liquid, the number of the combustors is large, the arrangement structure is complex, and the cost is high; the existing multi-fuel burner aims at two or three fuels in the same form, for example, a plurality of gases and liquids are concentrated in the same burner for treatment, so that stable, high-efficiency and low-nitrogen combustion of each fuel is difficult to realize; if the incinerator needs to save the operation maintenance and investment cost of the induced draft fan and adopts a positive pressure design and operation mode, the backfire phenomenon of the combustor caused by the reverse channeling of high-temperature flue gas in the incinerator is easily caused, and the normal use of the incinerator is influenced.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides the gas-liquid multi-fuel integrated burner which is simple in structure, beneficial to arrangement, capable of reducing cost, capable of realizing stable and efficient combustion of each fuel, capable of controlling NOx emission, simultaneously guaranteeing the burnout rate of various fuels, suitable for positive pressure operation of a hearth and wide in market application prospect.
In order to achieve the aim, the gas-liquid multi-fuel integrated burner comprises an air box, a fan connected with the air box, a central air pipe penetrating through the rear end of the air box, and a primary air pipe, a secondary air pipe and a tertiary air pipe which are fixedly arranged in the air box and are sequentially sleeved outside the central air pipe; the method is characterized in that: a waste liquid spray gun is arranged in the central air pipe, and a flame stabilizer is arranged in the front end of the primary air pipe outside the central air pipe; more than two primary air exhaust gas spray guns, two secondary air exhaust gas spray guns and three air exhaust gas spray guns pass through the rear end of the bellows, the front ends of the primary air exhaust gas spray guns are arranged in a primary air pipe and are positioned on the radial outer side of the flame stabilizer, and an ignition device sleeve and an ignition device are arranged in the primary air pipe; the front end of the secondary air pipe is internally provided with a secondary air orifice plate, and the front ends of the secondary air waste gas spray guns all penetrate through the secondary air orifice plate; the front ends of the tertiary air waste gas spray guns are all arranged in a tertiary air pipe, and swirl vanes are arranged in the tertiary air pipe; a compact burnout air pipe is arranged outside the tertiary air pipe.
The central air pipe, the primary air pipe, the secondary air pipe, the tertiary air pipe and the compact burn-out air pipe are all concentrically arranged and integrally arranged in the air box, different waste gas spray guns and waste liquid spray guns are arranged in the combustor in a layered manner, and the primary air pipe is internally provided with the ignition device sleeve and the ignition device, so that the structure is simple, the arrangement is facilitated, and the cost can be reduced; during operation, waste liquid and various waste gases are sprayed in a grading manner, the arrangement space of the spray gun is increased as much as possible, a smoke backflow area is enlarged, the mixture of backflow smoke and fuel is enhanced, a local high-temperature area is avoided, the generation of thermal nitrogen oxides is reduced, the spray gun adopts high spraying speed, the distribution range of a rich combustion state is reduced, and the generation of rapid nitrogen oxides is restrained from the source; the air quantity adopts the independent air distribution of the bellows, the central air pipe, the primary air pipe, the secondary air pipe and the compact after-combustion air pipe are all filled with direct-current air, the tertiary air pipe sprays rotational flow air, the air quantity multistage distribution is beneficial to adjusting and controlling the oxygen concentration in the initial stage of combustion so as to prevent more nitrogen oxides from being generated in the initial stage of combustion, and the fuel realizes the in-flame reduction of the nitrogen oxides in the under-oxygen combustion state; the waste liquid is sprayed out from the central air pipe, a burner at the front end of the outer part of the central air pipe can form a central backflow area, and high-temperature smoke in the entrainment furnace flows back, so that stable combustion is facilitated, and the generation of nitrogen oxides in the initial stage of combustion is reduced; the primary air exhaust gas spray gun is arranged on the outer side of the combustion stabilizer, so that the rapid ignition and stable combustion of the exhaust gas after being sprayed are facilitated; the secondary air is sprayed out through the secondary air hole plate, so that on one hand, the mixing of the primary air and the secondary air can be delayed, the air staged combustion is further enhanced, and on the other hand, the mixing and entrainment of the secondary air to surrounding smoke can be promoted, the oxygen concentration and the combustion flame temperature in the secondary air are reduced, and the emission of nitrogen oxides is further reduced; the tertiary air passes through the swirl vanes, so that the tertiary air can generate swirl, the mixing of fuel and wind is enhanced, and the ignition, stable combustion and burnout of the fuel are facilitated; the compact over-fire air can improve the air distribution adjustability of the burner and enhance the control capability of nitrogen oxides;
as a further improvement of the invention, the primary air exhaust gas spray gun, the secondary air exhaust gas spray gun and the tertiary air exhaust gas spray gun are uniformly arranged in the circumferential direction in the respective air pipes; the fuel and the dispensing energy can be better contacted and mixed, the occurrence of a local high-temperature area is avoided, the fuel is dispersed as much as possible, and the generation of nitrogen oxides is reduced to the greatest extent;
as a further improvement of the invention, the rear ends of the primary air exhaust gas spray gun, the secondary air exhaust gas spray gun and the tertiary air exhaust gas spray gun are connected with respective distributing rings positioned outside the rear end of the bellows, and more than one distributing ring is provided with a partition layer; the burner is convenient for distributing the gas of each spray gun, and when the variety of the waste gas is more, the interlayer can ensure that various gases are distributed through the same gas distribution ring, so that the burner has a simpler structure and is beneficial to saving the arrangement space;
as a further improvement of the invention, a sealing air interface is arranged on the central air pipe and the ignition device sleeve; if the hearth adopts a positive pressure operation mode, high-pressure sealing air is introduced from the sealing air interface, so that the burning loss of a central air pipe and an ignition device sleeve caused by the reverse channeling of high-temperature flue gas in the furnace can be avoided;
as a further improvement of the invention, a liquid flame detection device and a gas flame detection device are arranged in the primary air pipe; the flame can be monitored, and the aim of safe operation is fulfilled;
as a further improvement of the invention, a regulating air door is arranged in the inlet end of the tertiary air pipe; the air quantity of tertiary air can be regulated by the regulating air door, and the distribution of primary air, secondary air and compact overfire air is changed, so that the aim of regulating air distribution is fulfilled;
as a further improvement of the invention, the fan is an independent fan; an independent fan supplies air for a single burner;
in conclusion, the invention has the advantages of simple structure, contribution to arrangement, cost reduction, stable and efficient combustion of each fuel, control of NOx emission, guarantee of burnout rate of various fuels, suitability for positive pressure operation of a hearth and wide market application prospect.
Drawings
Fig. 1 is a front view of an embodiment of the present invention.
Fig. 2 is a view in the direction a of fig. 1.
Fig. 3 is a partial view in the H direction of fig. 1.
Fig. 4 is an enlarged view at C of fig. 1.
Detailed Description
The invention will be further described with reference to the drawings and examples.
As shown in fig. 1 to 4, the gas-liquid multi-fuel integrated burner of this embodiment includes a bellows 1, an independent fan 2 connected with the bellows, a central air duct 3 passing through the rear end of the bellows 1, a primary air duct 4 fixedly arranged in the bellows and sequentially sleeved outside the central air duct 3, a secondary air duct 5, a tertiary air duct 6 and a compact burnout air duct 7; a waste liquid spray gun 8 is arranged in the central air pipe 3, and a flame stabilizer 9 is arranged in the front end of the primary air pipe 4 outside the central air pipe 3; three primary air exhaust gas spray guns 10, eight secondary air exhaust gas spray guns 11 and eight tertiary air exhaust gas spray guns 12 all penetrate through the rear end of the air box 1, the front ends of the primary air exhaust gas spray guns 10 are all arranged in the primary air pipe 4 and are positioned on the radial outer side of the flame stabilizer 9, and an ignition device sleeve 13 and an ignition device 14 penetrating through the rear end of the air box are arranged in the primary air pipe 4; the front end of the secondary air pipe 5 is internally provided with a secondary air orifice 15, and the front end of each secondary air exhaust gas spray gun 11 passes through the secondary air orifice 15; the front ends of the tertiary air waste gas spray guns 12 are all arranged in a tertiary air pipe 6, swirl vanes 16 are arranged in the tertiary air pipe 6, and a damper 17 is arranged in the inlet end of the tertiary air pipe 6; the primary air exhaust gas spray guns 10, the secondary air exhaust gas spray guns 11 and the tertiary air exhaust gas spray guns 12 are uniformly arranged in the circumferential direction in the respective air pipes, the rear ends of the primary air exhaust gas spray guns 10, the secondary air exhaust gas spray guns 11 and the tertiary air exhaust gas spray guns 12 are connected with respective distributing rings 18 or 19 or 20 positioned outside the rear end of the air box 1, and two interlayer 24 are arranged in the distributing rings 18; a sealing air interface 21 is arranged on the central air pipe 3 and the ignition device sleeve 13; a liquid flame detection device 22 and a gas flame detection device 23 are arranged in the primary air pipe 4;
the central air pipe 3, the primary air pipe 4, the secondary air pipe 5, the tertiary air pipe 6 and the compact burnout air pipe 7 are concentrically arranged from inside to outside and integrally arranged in the air box 1, different waste gas spray guns 10, 11 and 12 and waste liquid spray guns 8 are arranged in the combustor in a layered manner, and an ignition device sleeve 13 and an ignition device 14 are arranged in the primary air pipe 4, so that the structure is simple, the arrangement is facilitated, and the cost can be reduced; two interlayer 24 are arranged in the distributing ring 18, three primary air and waste gas spray guns 10 with different lengths can be used for introducing three different waste gases, and the three gases are distributed through the same distributing ring 18, so that the burner has a simpler structure and is beneficial to saving the arrangement space; during operation, waste liquid and various waste gases are sprayed in layers and stages through the waste gas spray guns 10, 11 and 12 and the waste liquid spray gun 8, the arrangement interval of the spray guns in space is increased as much as possible, a smoke reflux area is enlarged, the mixture of reflux smoke and fuel is enhanced, a local high-temperature area is avoided, the generation of thermal nitrogen oxides can be reduced, the spray gun adopts high spraying speed, the distribution range of a rich combustion state is reduced, and the generation of rapid nitrogen oxides is restrained from the source; the air quantity adopts an independent fan 2 and an air box 1 to independently distribute air, direct-current air is introduced into a central air pipe 2, a primary air pipe 4, a secondary air pipe 5 and a compact over-fire air pipe 7, a tertiary air pipe 6 sprays rotational air, the air quantity multistage distribution is beneficial to adjusting and controlling the oxygen concentration in the initial stage of combustion so as to prevent more nitrogen oxides from being generated in the initial stage of combustion, and the fuel realizes the internal reduction of the flame of the nitrogen oxides in the under-oxygen combustion state; the waste liquid spray gun 8 is arranged in the central air pipe 3, waste liquid is sprayed out from the central air pipe 3 and is positioned in a central high-temperature area of the burner, so that the burnout of the waste liquid is facilitated; the burner 9 at the front end of the outer part of the central air pipe 3 can form a central backflow area, and the high-temperature flue gas in the entrainment furnace flows back, so that stable combustion is facilitated, and the generation of nitrogen oxides in the initial stage of combustion is reduced; the primary air exhaust gas spray gun 10 is arranged outside the flame stabilizer 9, which is favorable for rapid ignition and stable combustion after the exhaust gas is sprayed; the secondary air orifice plate 15 is provided with a plurality of small holes 26, and secondary air is sprayed out through the small holes 26 of the secondary air orifice plate 15, so that on one hand, the mixing of primary air and secondary air can be delayed, the air staged combustion can be further enhanced, and on the other hand, the mixing and entrainment of the secondary air to surrounding flue gas can be promoted, the oxygen concentration and the combustion flame temperature in the secondary air can be reduced, and the emission of nitrogen oxides can be further reduced; the tertiary air passes through the swirl vanes 16, so that the tertiary air can generate swirl, the mixing of fuel and wind is enhanced, and the ignition, stable combustion and burnout of the fuel are facilitated; the compact overfire air can improve the air distribution adjustability of the burner, and the air quantity of tertiary air can be adjusted by the aid of the adjusting air door 17, so that the distribution of primary air, secondary air and compact overfire air is changed, the purpose of adjusting the air distribution is achieved, and the control capability of nitrogen oxides is enhanced; the exhaust gas spray guns are uniformly arranged in the circumferential direction in the air pipes, so that the fuel and the distributing energy can be better contacted and mixed, the occurrence of a local high-temperature area is avoided, the exhaust gas is dispersed as much as possible, and the generation of nitrogen oxides is reduced to the greatest extent; if the hearth adopts a positive pressure operation mode, high-pressure sealing air is introduced through the sealing air interface 21, so that the central air pipe 3 and the ignition device sleeve 13 can be prevented from being burnt due to the reverse channeling of high-temperature flue gas in the hearth; the liquid flame detection device 22 and the gas flame detection device 23 can be used for realizing the monitoring of flame, so as to achieve the aim of safe operation;
the present invention has been illustrated by the above-described embodiments, but it should be understood that the above-described embodiments are for purposes of illustration and description only and are not intended to limit the invention to the embodiments described.

Claims (7)

1. The gas-liquid multi-fuel integrated burner comprises an air box, a fan connected with the air box, a central air pipe penetrating through the rear end of the air box, a primary air pipe, a secondary air pipe and a tertiary air pipe, wherein the primary air pipe, the secondary air pipe and the tertiary air pipe are fixedly arranged in the air box and are sequentially sleeved outside the central air pipe; the method is characterized in that: a waste liquid spray gun is arranged in the central air pipe, and a flame stabilizer is arranged in the front end of the primary air pipe outside the central air pipe; more than two primary air exhaust gas spray guns, two secondary air exhaust gas spray guns and three air exhaust gas spray guns pass through the rear end of the bellows, the front ends of the primary air exhaust gas spray guns are arranged in a primary air pipe and are positioned on the radial outer side of the flame stabilizer, and an ignition device sleeve and an ignition device are arranged in the primary air pipe; the front end of the secondary air pipe is internally provided with a secondary air orifice plate, and the front ends of the secondary air waste gas spray guns all penetrate through the secondary air orifice plate; the front ends of the tertiary air waste gas spray guns are all arranged in a tertiary air pipe, and swirl vanes are arranged in the tertiary air pipe; a compact burnout air pipe is arranged outside the tertiary air pipe.
2. A gas-liquid multi-fuel integrated burner as defined in claim 1, wherein: the primary air exhaust gas spray guns, the secondary air exhaust gas spray guns and the tertiary air exhaust gas spray guns are uniformly arranged in the circumferential direction of the air pipes.
3. A gas-liquid multi-fuel integrated burner as claimed in claim 1 or 2, wherein: the rear ends of the primary air exhaust gas spray gun, the secondary air exhaust gas spray gun and the tertiary air exhaust gas spray gun are connected with respective distributing rings positioned outside the rear end of the bellows, and more than one distributing ring is provided with a partition layer.
4. A gas-liquid multi-fuel integrated burner as claimed in claim 3, wherein: and a sealing air interface is arranged on the central air pipe and the ignition device sleeve.
5. A gas-liquid multi-fuel integrated burner as defined in claim 4, wherein: the primary air pipe is internally provided with a liquid flame detection device and a gas flame detection device.
6. A gas-liquid multi-fuel integrated burner as defined in claim 5, wherein: and a regulating air door is arranged in the inlet end of the tertiary air pipe.
7. A gas-liquid multi-fuel integrated burner as defined in claim 6, wherein: the fan is an independent fan.
CN202310633224.5A 2023-05-31 2023-05-31 Gas-liquid multi-fuel integrated burner Pending CN116906904A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310633224.5A CN116906904A (en) 2023-05-31 2023-05-31 Gas-liquid multi-fuel integrated burner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310633224.5A CN116906904A (en) 2023-05-31 2023-05-31 Gas-liquid multi-fuel integrated burner

Publications (1)

Publication Number Publication Date
CN116906904A true CN116906904A (en) 2023-10-20

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ID=88349991

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310633224.5A Pending CN116906904A (en) 2023-05-31 2023-05-31 Gas-liquid multi-fuel integrated burner

Country Status (1)

Country Link
CN (1) CN116906904A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110553267A (en) * 2019-08-29 2019-12-10 东方电气集团东方锅炉股份有限公司 multi-fuel low-nitrogen combustor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110553267A (en) * 2019-08-29 2019-12-10 东方电气集团东方锅炉股份有限公司 multi-fuel low-nitrogen combustor
CN110553267B (en) * 2019-08-29 2024-07-26 东方电气集团东方锅炉股份有限公司 Multi-fuel low-nitrogen combustor

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