CN205447747U - Ultralow NOx combustor of hot flue gas self -loopa type - Google Patents

Ultralow NOx combustor of hot flue gas self -loopa type Download PDF

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Publication number
CN205447747U
CN205447747U CN201620194611.9U CN201620194611U CN205447747U CN 205447747 U CN205447747 U CN 205447747U CN 201620194611 U CN201620194611 U CN 201620194611U CN 205447747 U CN205447747 U CN 205447747U
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CN
China
Prior art keywords
combustor
refractory brick
burner
gas gun
venturi
Prior art date
Application number
CN201620194611.9U
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Chinese (zh)
Inventor
李飞
李腾飞
高松
韩永辉
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河南方圆工业炉设计制造有限公司
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Priority to CN201620194611.9U priority Critical patent/CN205447747U/en
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Publication of CN205447747U publication Critical patent/CN205447747U/en

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Abstract

The utility model discloses an ultralow NOx combustor of hot flue gas self -loopa type, it is main including burner housing, resistant firebrick, venturi, draw and penetrate the gas rifle, main gas rifle, transfer windscreen board and altar lamp, burner housing passes through the flange to be fixed on the drop -bottom, resistant firebrick is located burner housing upper portion, its central passage is the combustion chamber, venturi has been arranged on the resistant firebrick, draw and penetrate the gas rifle firebrick is equidistant arranges around resistant, draw and penetrate the shower nozzle and install and penetrate gas rifle head in drawing, draw the central line coincidence of spouting hole center line and venturi of penetrating on the shower nozzle, the export of venturi upper portion is located the upper strata of combustion chamber, main gas rifle passes and is coaxial with resistant firebrick by the combustor center, be located the lower floor of combustion chamber, transfer wind baffle installation at the burner housing lateral wall, communicate with each other with resistant firebrick center combustion chamber, the altar lamp sets up in main gas rifle one side. The utility model discloses the combustor can effectively reduce NOx formation volume, can balance the upper and lower temperature of furnace simultaneously, reinforces the heat transfer effect.

Description

Heat smoke self-circulation type surpasses low-NOx combustor

Technical field

This utility model belongs to petrochemical industry, relates generally to a kind of heat smoke self-circulation type and surpasses low-NOx combustor.

Background technology

Issue along with China GB31570-2015 " petroleum refining industry pollutant emission standard ", new environmental protection standard limits increasingly stringent to the discharge of NOx, and using low-NOx combustor is that to solve heating furnace NOx emission the most quickly, be also the most direct scheme to current each big oil play.

Low-NOx combustor mainly reduces the growing amount of NOx in fuel combustion process by fuel technologies such as two-stage nitration burning, flame segmentation, smoke backflows at present.But it is limited in one's ability that suppression NOx is generated by two-stage nitration burning, and the more difficult control of proportioning that there is first and second air in practice;When flame is segmented in fire box temperature less than 500 DEG C, combustion flame starts to become unstable, and in combustion product, the content of CO can dramatically increase;Smoke backflow take part in combustion process due to low-temperature flue gas, reduces combustion flame temperature, reduces excess air coefficient, thus reduces the generation of NOx.Using smoke backflow is to reduce that heating furnace NOx emission is the most basic, most efficient method, according to the outside flue gas recirculation of body of heater, flue and controllable register need to be set up between blower inlet and air-introduced machine export, therefore the problem that operating cost is high, floor space is big will be faced.

Utility model content

The purpose of this utility model is to provide a kind of heat smoke self-circulation type and surpasses low-NOx combustor, only by burner itself without realizing flue gas recirculation by external impetus, thus reaches ring

Guarantor, energy-conservation effect.

The purpose of this utility model can adopt the following technical scheme that and realize:

nullThe heat smoke self-circulation type that the utility model proposes surpasses low-NOx combustor and mainly includes burner shell、Refractory brick、Venturi tube、Injection gas gun、Main gas gun、Adjust windshield plate and altar lamp,Described burner is fixed on drop-bottom by the mounting flange on burner shell,Refractory brick is positioned at burner shell top,Its central passage constitutes the combustor of described burner,Concealed Venturi pipe it has been evenly arranged on refractory brick,Injection gas gun is equally spaced around refractory brick,Injection shower nozzle is installed on injection gas gun head,Orifice center line on injection shower nozzle overlaps with the centrage of Venturi tube,Venturi tube upper outlet is positioned at the upper strata of combustor,Main gas gun is passed and coaxial with refractory brick by burner centre,Being positioned at combustor lower floor adjusts windshield plate to be arranged on burner casing body sidewall,Central combustion chamber communicates with refractory brick,Altar lamp is arranged on main gas gun side.

Being evenly arranged eight Venturi tubes on described refractory brick, Venturi tube is center of circle radiant type distribution, and is positioned at combustor upper strata.

Described injection gas gun is evenly arranged in around refractory brick, and injection shower nozzle is installed on injection gas gun head, and the orifice center line on injection shower nozzle overlaps with the centrage of Venturi tube.

Described main gas gun is arranged on burner centre, coaxial with refractory brick, is positioned at combustor lower floor, for stablizing combustion flame.

The fuel gas that said structure described in the utility model can make the main gas gun being in combustor lower floor eject is mixing with combustion air through refractory brick, this part of fuel is made to burn under average stoichiometric air dme ratio i.e. 16:1, it is in the fuel gas that the ejection head height speed on combustor upper strata ejects, when by Venturi tube, negative pressure can be produced at the contraction section of Venturi tube, this negative pressure is utilized to mix with fuel gas in the low-temperature flue gas of lower furnace portion is sucked into Venturi tube, fuel gas can be made after finally mixing with combustion air in refractory brick to reach 20:1 with the air-fuel ratio of combustion air, this part of fuel is made to be in lean burn state.During stratified combustion upper and lower due to combustor, being in the fuel gas that the injection shower nozzle on combustor upper strata sprayed is lean burn state, the flame instability formed after burning, and the fuel gas that the main gas gun being in combustor lower floor is sprayed and combustion air burn under average stoichiometric air dme ratio 16:1, the flame formed in combustor lower floor is upright and outspoken, strong, effectively stabilizes combustor upper strata flame.The low-temperature flue gas being inhaled into mostly is non-flammable noble gas, and burner hearth bottom flue-gas temperature relatively flame zone temperature is lower, after mixing with combustion air and fuel, can effectively reduce combustion flame zone temperature;After low-temperature flue gas mixes with combustion air, reduce the oxygen concentration in combustion air, therefore under lower oxygen concentration and lower flame temperature, the generation of NOx has obtained effective suppression.Simultaneously under the ejector action of injection shower nozzle and Venturi, it is achieved that the upper and lower circulation of burner hearth inside smoke, can the upper and lower temperature of active balance burner hearth, strengthen radiant heat transfer, further increase the thermal efficiency of heating furnace.But flue gas mostly is non-flammable noble gas, the amount of circulating flue gas is unsuitable excessive, and general control is 10% ~ 20% optimal total exhaust gas volumn, and the excessive after-combustion of amount of circulating gas can become the most unstable, and the utilization rate of fuel declines therewith.

The burner that this utility model is proposed is compared with conventional burners, and flame temperature can be down to less than 1200 DEG C, and the growing amount of NOx can reduce 40% ~ 60%, and thermal efficiency of heating furnace can improve 1% simultaneously, is to integrate environmental protection, energy-conservation, efficient novel burner.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

In figure: 1, refractory brick, 2, Venturi tube, 3, injection shower nozzle, 4, injection gas gun, 5, burner shell, 6, altar lamp, 7, main gas gun, 8, adjust windshield plate, 9, drop-bottom, 10, burner hearth.

Detailed description of the invention

In conjunction with accompanying drawing, this utility model is further illustrated with:

As it is shown in figure 1, a kind of heat smoke self-circulation type surpasses low-NOx combustor, mainly it is made up of burner shell 5, refractory brick 1, Venturi tube 2, injection gas gun 4, main gas gun 7, tune windshield plate 8, altar lamp 6.Described burner is fixed on drop-bottom 9 by the mounting flange on burner shell 5, refractory brick 1 is positioned at burner shell 5 top, its inside center passage constitutes the combustor of described burner, refractory brick 1 central passage is combustor, eight Venturi tubes 2 it have been evenly arranged on refractory brick 1, Venturi tube 2 is distributed in center of circle radiant type, eight injection gas guns 4 are arranged on around refractory brick 1, injection shower nozzle 3 is installed on injection gas gun 4 head, orifice center line on injection shower nozzle 3 overlaps with the centrage of Venturi tube 2, Venturi tube 2 upper outlet is positioned at the upper strata of combustor;Main gas gun 7 is arranged on burner centre, and coaxial with refractory brick 1, is positioned at the lower floor of combustor, for stable combustion flame, adjusting windshield plate 8 to be positioned at combustor sidewalls, what it was internal helps combustion air channel and the combustion chamber formed by refractory brick 1, and altar lamp 6 is arranged near main gas gun 7.

Burner described in the utility model uses flue gas self-loopa, lean burn, stratified combustion, the fuel gas of combustor lower floor main gas gun 7 ejection is pressed with combustion air in combustor and is burnt under average stoichiometric air dme ratio 16:1, the combustion flame formed is upright and outspoken, effectively, the fuel gas of the injection shower nozzle 3 high velocity spray injection on combustor upper strata is when through Venturi tube 2, negative pressure can be produced at its suction casing, this negative pressure is utilized to mix with fuel in the low-temperature flue gas of burner hearth 10 bottom is drawn into Venturi tube 2, and mix with combustion air in finally delivering to refractory brick 1 combustor, mixing post fuel gas reaches 20:1 with the air-fuel ratio of combustion air, it is in lean burn state, the flame instability that burning is formed, and combustor lower floor is upright and outspoken, strong flame effectively stabilizes the flame on combustor upper strata.Burner hearth 10 bottom flue-gas temperature relatively flame zone temperature is lower, and containing a large amount of non-flammable noble gases in flue gas, after mixing with combustion air, has both reduced the temperature of flame zone, and reduced again the oxygen concentration in combustion air, it is suppressed that the generation of NOx.Simultaneously under the ejector action of injection shower nozzle and Venturi, burner has driven the upper and lower flue gas recirculation of burner hearth 10, the flue-gas temperature that active balance burner hearth 10 is upper and lower, enhances radiant heat transfer, improves thermal efficiency of heating furnace.But flue gas mostly is non-flammable noble gas, the amount of circulating flue gas is unsuitable excessive, and general control is 10% ~ 20% optimal total exhaust gas volumn, and the excessive after-combustion of amount of circulating gas can become the most unstable, and the utilization rate of fuel declines therewith.

Claims (4)

  1. null1. a heat smoke self-circulation type surpasses low-NOx combustor,Mainly include burner shell (5)、Refractory brick (1)、Venturi tube (2)、Injection gas gun (4)、Main gas gun (7)、Adjust windshield plate (8) and altar lamp (6),It is characterized in that: described burner is fixed on drop-bottom (9) by the mounting flange on burner shell (5),Refractory brick (1) is positioned at burner shell (5) top,Its inside center passage constitutes the combustor of described burner,Concealed Venturi pipe (2) it has been evenly arranged on refractory brick (1),Injection gas gun (4) is equally spaced around refractory brick (1),Injection shower nozzle (3) is arranged at injection gas gun (4) head,Orifice center line on injection shower nozzle (3) overlaps with the centrage of Venturi tube (2),Venturi tube 2 upper outlet is positioned at the upper strata of combustor,Main gas gun (7) is passed and coaxial with refractory brick (1) by burner centre,It is positioned at the lower floor of combustor,Windshield plate (8) is adjusted to be arranged on burner shell (5) sidewall,Communicate with refractory brick (1) central combustion chamber,Altar lamp (6) is arranged on main gas gun (7) side.
  2. A kind of heat smoke self-circulation type the most according to claim 1 surpasses low-NOx combustor, and it is: being evenly arranged eight Venturi tubes (2) on described refractory brick (1), Venturi tube (2) is distributed in center of circle radiant type, and is positioned at combustor upper strata.
  3. A kind of heat smoke self-circulation type the most according to claim 1 surpasses low-NOx combustor, it is characterized in that: described injection gas gun (4) is evenly arranged in refractory brick (1) around, injection shower nozzle (3) is installed on injection gas gun (4) head, and the orifice center line on injection shower nozzle (3) overlaps with the centrage of Venturi tube (2).
  4. A kind of heat smoke self-circulation type the most according to claim 1 surpasses low-NOx combustor, it is characterized in that: described main gas gun (7) is arranged on burner centre, coaxial with refractory brick (1), is positioned at combustor lower floor, for stablizing combustion flame.
CN201620194611.9U 2016-03-15 2016-03-15 Ultralow NOx combustor of hot flue gas self -loopa type CN205447747U (en)

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Application Number Priority Date Filing Date Title
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105570890A (en) * 2016-03-15 2016-05-11 河南方圆工业炉设计制造有限公司 Hot flue gas self-circulation type ultra-low NOx combustor
CN106440798A (en) * 2016-11-29 2017-02-22 德米特(苏州)电子环保材料有限公司 Calcining equipment
CN106482519A (en) * 2016-11-29 2017-03-08 德米特(苏州)电子环保材料有限公司 Calcining furnace
CN106482518A (en) * 2016-11-29 2017-03-08 德米特(苏州)电子环保材料有限公司 Ablation device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105570890A (en) * 2016-03-15 2016-05-11 河南方圆工业炉设计制造有限公司 Hot flue gas self-circulation type ultra-low NOx combustor
CN106440798A (en) * 2016-11-29 2017-02-22 德米特(苏州)电子环保材料有限公司 Calcining equipment
CN106482519A (en) * 2016-11-29 2017-03-08 德米特(苏州)电子环保材料有限公司 Calcining furnace
CN106482518A (en) * 2016-11-29 2017-03-08 德米特(苏州)电子环保材料有限公司 Ablation device
CN106482518B (en) * 2016-11-29 2019-05-10 德米特(苏州)电子环保材料有限公司 Ablation device

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Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of utility model: Ultralow NOx combustor of hot flue gas self -loopa type

Effective date of registration: 20190412

Granted publication date: 20160810

Pledgee: Bank of China, Limited by Share Ltd, Luoyang branch

Pledgor: Henan Fangyuan Industry Furnace Design Manufacture Co., Ltd.

Registration number: 2019410000010

Denomination of utility model: Ultralow NOx combustor of hot flue gas self -loopa type

Effective date of registration: 20190412

Granted publication date: 20160810

Pledgee: Bank of China, Limited by Share Ltd, Luoyang branch

Pledgor: Henan Fangyuan Industry Furnace Design Manufacture Co., Ltd.

Registration number: 2019410000010

PE01 Entry into force of the registration of the contract for pledge of patent right
PC01 Cancellation of the registration of the contract for pledge of patent right

Date of cancellation: 20200427

Granted publication date: 20160810

Pledgee: Bank of China, Limited by Share Ltd, Luoyang branch

Pledgor: HENAN FANGYUAN INDUSTRIAL FURNACE DESIGN AND MANUFACTURING Co.,Ltd.

Registration number: 2019410000010

PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of utility model: Ultralow NOx combustor of hot flue gas self -loopa type

Effective date of registration: 20200427

Granted publication date: 20160810

Pledgee: Bank of China, Limited by Share Ltd, Luoyang branch

Pledgor: HENAN FANGYUAN INDUSTRIAL FURNACE DESIGN AND MANUFACTURING Co.,Ltd.

Registration number: Y2020980001836

PC01 Cancellation of the registration of the contract for pledge of patent right
PE01 Entry into force of the registration of the contract for pledge of patent right