CN109654489B

CN109654489B - Improve combustion efficiency and reduce NOXLow-nitrogen-emission combustor

Info

Publication number: CN109654489B
Application number: CN201811510274.XA
Authority: CN
Inventors: 戚明浩; 陈伟
Original assignee: DATANG HUAIBEI POWER PLANT
Current assignee: DATANG HUAIBEI POWER PLANT
Priority date: 2018-12-11
Filing date: 2018-12-11
Publication date: 2020-04-24
Anticipated expiration: 2038-12-11
Also published as: CN109654489A

Abstract

The invention discloses a method for improving combustion efficiency and reducing NO_XThe discharged low-nitrogen combustor comprises a combustor body, three supporting legs are welded on the lower portion of the outer surface of the combustor body in an annular array mode, supporting plates are welded among the three supporting legs, an air blower is fixedly installed on the upper surface of each supporting plate and is electrically connected with an external power supply, an air outlet of the air blower is communicated with the bottom end of a communicating pipe, and a pipe sleeve a is sleeved on the outer surface of the communicating pipe; through setting up the whirl fan housing, the whirl board, communicating pipe, a plurality of whirl board forms the whirl passageway, make the air of coming through the air-blower drum can enter into the whirl fan housing through communicating pipe in, enter into the whirl passageway and form the whirl under the effect of whirl board, make the air can become the heliciform and rise, make the air enter into the air inlet cover, mix with the gas via through-hole b blowout, thereby the inflow of air has been promoted, make air and gas contact more abundant, combustion efficiency has been promoted.

Description

Improve combustion efficiency and reduce NOXLow-nitrogen-emission combustor

Technical Field

The invention belongs to the technical field of low-nitrogen combustors, and particularly relates to a low-nitrogen combustor capable of improving combustion efficiency and reducing NO_XAn exhaust low nitrogen burner.

Background

Low nitrogen combustion is the formation of nitrogen oxides as part of the combustion reaction: the nitrogen oxides formed by combustion being mainly NO and NO₂Collectively referred to as NO_XInfluencing fuel type NO_XThe generation factors are many and are related to the temperature, oxygen content, reaction time and the physical and chemical characteristics of the coal powder, and NO in the atmosphere is generated in the combustion process of the fuel_XAfter being dissolved in water, the acid rain can be generated into nitric acid rain, and the acid rain can bring wide harm to the environment, so that huge economic loss is caused, such as: corrosion of buildings and industrial equipment; destroying the open cultural relics and historic sites; damage to plant foliage, leading to forest death; so that fish and shrimps in the lake die; the soil components are destroyed, so that the crops are reduced in yield and even die; the drinking of underground water caused by acid substances is harmful to human body. The damage of the nitrate rain to trees and crops is 1 time of that of the sulfuric acid under the same acid concentration, and NO is_XAlso has direct damage to human health, NO_XThe higher the concentration, the more toxic it is because it is easily combined with hemoglobin in animal blood, resulting in blood hypoxia and central nerve paralysis.

Original combustor is in the course of the work all directly lets in the operation of burning in the combustor body with gas and air directly, and combustion efficiency is not high to cause to produce too much NO in the combustion process_XThereby causing pollution to the environment.

Disclosure of Invention

The object of the present invention is to provide a method for improving combustion efficiency and reducing NO_XLow-nitrogen emission burner to solve the problems set forth in the background art.

In order to achieve the purpose, the invention provides the following technical scheme:

improve combustion efficiency and reduce NO_XThe low-nitrogen combustor comprises a combustor body, three supporting legs are welded on the lower portion of the outer surface of the combustor body in an annular array mode, a supporting plate is welded among the three supporting legs, an air blower is fixedly mounted on the upper surface of the supporting plate and electrically connected with an external power supply, an air outlet of the air blower is communicated with the bottom end of a communication pipe, a pipe sleeve a is sleeved on the outer surface of the communication pipe and clamped on the lower surface of the combustor body, the communication pipe penetrates through the pipe sleeve a to extend into the combustor body, the top end of the communication pipe is communicated with a cyclone fan cover, a cyclone plate is arranged on the inner wall of the cyclone fan cover, a fixing plate is welded on the upper surface of the inner side wall of the combustor body, a vent pipe is arranged on the fixing plate, the upper surface of the vent pipe is communicated with a gas inlet pipe, the utility model discloses a gas burner, including a burner body, pipe box b, gas intake pipe, upper surface, top cap, air inlet cylinder, pipe box b, electrode bar, external power supply, pipe box b, the surface of gas intake pipe is provided with two fixed covers, the inner wall of breather pipe is provided with the gas shower nozzle that is linked together with the breather pipe, the upper surface demountable installation of fixed plate has the electrode bar, electrode bar and external power supply electric connection, the upper surface of fixed plate and the lower surface laminating of top cap, the lower surface of top cap is linked together with the top of air inlet cylinder, the air inlet cylinder passes through-hole a of seting up on the fixed plate and extends to the fixed plate below, the bottom of airAir outlets are symmetrically arranged.

Preferably, the inside whirl board of whirl fan housing has a plurality of, and the slope of a plurality of whirl board sets up the inside wall at the whirl fan housing, and forms the whirl passageway between two adjacent whirl boards.

Preferably, a plurality of through holes b are annularly formed in the outer surface of the top cover, and the through holes b are respectively obliquely and upwards formed in the outer surface of the top cover.

Preferably, the through hole b on the top cover is positioned below the gas nozzle on the vent pipe.

Preferably, the inside wall of fixed cover and the laminating of the surface of gas intake pipe, fixed cover passes through two bolt fixed mounting at the back of combustor body.

Preferably, the outer surface of the air inlet cylinder is fixedly connected with four fixing columns, and one ends, far away from the air inlet cylinder, of the four fixing columns are fixedly connected with the inner side wall of the burner body.

Preferably, the maximum radius of the inlet hood is smaller than the diameter of the burner body.

Preferably, the diameter of the lower surface of the top cover is larger than that of the through hole a.

Compared with the prior art, the invention has the beneficial effects that:

(1) by arranging the cyclone fan cover, the cyclone plates and the communicating pipes, the plurality of cyclone plates form a cyclone channel, so that air blown in by the air blower can enter the cyclone fan cover through the communicating pipes and then enter the cyclone channel under the action of the cyclone plates to form cyclone, the air can spirally rise, the air enters the air inlet cover and is sprayed out of the through holes b to be mixed with fuel gas, the inflow of the air is increased, the air is more fully contacted with the fuel gas, and the combustion efficiency is improved;

(2) through setting up breather pipe, gas shower nozzle, through-hole b, top cap and air admission section of thick bamboo for after the whirl that forms through the whirl board operation enters into the air admission section of thick bamboo, through-hole b blowout, the gas passes through the breather pipe simultaneously and mixes with the air via gas shower nozzle blowout, thereby makes gas and emptyThe gas is mixed more uniformly, the combustion efficiency is further improved, and the NO is reduced_XThe discharge amount of (c);

(3) by arranging the air inlet cover which is arranged inside the burner body, one part of air enters the air inlet cylinder through the air inlet cover and is sprayed out of the air inlet cylinder through the through hole b to perform combustion reaction with the fuel gas, and the other part of air flows upwards through a gap formed between the air inlet cover and the burner body and is discharged through the air outlet, so that the burner body can be cooled simultaneously in the process of discharging the air through the air outlet, thereby avoiding the overhigh temperature of the burner body in the combustion operation process and smoothly performing the combustion reaction;

(4) through setting up fixed cover and bolt, fix the gas intake pipe through bolt and fixed section of thick bamboo to make the gas intake pipe difficult for rocking and more stable at the in-process of carrying the gas.

Drawings

FIG. 1 is a schematic view of the low-NOx burner of the present invention;

FIG. 2 is a left side view of the low-NOx burner of the present invention;

FIG. 3 is a rear view of the low-NOx burner of the present invention;

FIG. 4 is a schematic structural diagram of an air intake barrel of the low-nitrogen burner of the invention;

FIG. 5 is a schematic top view of a flue of the low-nitrogen combustor of the present invention;

FIG. 6 is an enlarged schematic view of the structure of the present invention at A.

In the figure: 1. a burner body; 2. supporting legs; 3. a support plate; 4. a blower; 5. a communicating pipe; 6. A pipe sleeve a; 7. a cyclone fan cover; 8. a swirl plate; 9. a swirling flow passage; 10. a fixing plate; 11. a breather pipe; 12. a pipe sleeve b; 13. fixing a sleeve; 14. a bolt; 15. a gas burner; 16. an electrode rod; 17. a top cover; 18. an air intake cylinder; 19. a through hole a; 20. an air intake hood; 21. fixing a column; 22. an air outlet; 23. A gas inlet pipe; 24. and a through hole b.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to FIGS. 1-6, the present invention provides a method for increasing combustion efficiency and reducing NO_XThe low-nitrogen combustor comprises a combustor body 1, three supporting legs 2 are welded on the lower portion of the outer surface of the combustor body 1 in an annular array mode, supporting plates 3 are welded among the three supporting legs 2, an air blower 4 is fixedly installed on the upper surface of each supporting plate 3, the air blower 4 is electrically connected with an external power supply, an air outlet of the air blower 4 is communicated with the bottom end of a communication pipe 5, a pipe sleeve a6 is sleeved on the outer surface of the communication pipe 5, a pipe sleeve a6 is clamped on the lower surface of the combustor body 1, the communication pipe 5 penetrates through a pipe sleeve a6 to extend into the combustor body 1, the top end of the communication pipe 5 is communicated with a cyclone air cover 7, a cyclone plate 8 is arranged on the inner wall of the cyclone air cover 7, a fixing plate 10 is welded on the upper surface of the inner side wall of the combustor body 1, a vent pipe 11 is arranged on the fixing plate 10, the pipe sleeve b12 is clamped on the back of the burner body 1, two fixing sleeves 13 are arranged on the outer surface of the gas inlet pipe 23, a gas nozzle 15 communicated with the gas inlet pipe 11 is arranged on the inner wall of the gas inlet pipe 11, an electrode rod 16 is detachably mounted on the upper surface of the fixing plate 10, the electrode rod 16 is electrically connected with an external power supply, the upper surface of the fixing plate 10 is attached to the lower surface of the top cover 17, the lower surface of the top cover 17 is communicated with the top end of the air inlet cylinder 18, the air inlet cylinder 18 penetrates through a through hole a19 formed in the fixing plate and extends to the lower side of the fixing plate 10, the bottom end of the air inlet cylinder 18 is communicated with the upper surface of the air inlet cover 20.

In this embodiment, the model of air-blower 4 can be MS-202, and inside air-blower 4 bloated into combustor body 1 with external air, and then made the air form the whirl through the effect of whirl board 8 in the whirl fan housing 7 to promote the inflow of air, made the air more abundant with the gas contact simultaneously, promoted combustion efficiency.

In this embodiment, the electrode rod 16 is an ignition electrode rod, and the electrode rod 16 performs an ignition operation on the gas and air that are uniformly mixed, thereby performing a combustion operation.

In the embodiment, when the burner body 1 works, the blower 4 is started to make the blower 4 blow air into the burner body 1 through the communicating pipe 5, the air forms rotational flow to rise under the action of the rotational flow plate 8, a part of air flow enters the air inlet cylinder 18 through the air inlet cover 20 and is sprayed out through the through hole b24, meanwhile, the fuel gas enters the air vent pipe 11 through the fuel gas inlet pipe 23, and is sprayed out through the fuel gas nozzle 15 and is uniformly mixed with the air, meanwhile, the electrode rod 16 is controlled to be ignited for combustion operation, the other part of air flow flows upwards through a gap between the air inlet cover 20 and the burner body 1 and is discharged through the air outlet 22, meanwhile, the burner body 1 is cooled in the process that the air flow is discharged through the air outlet 22, the air flow is matched with the through holes b24 on the top cover 17 through the arrangement of the plurality of fuel gas nozzles 15, thereby increasing the inflow of the air, thereby leading the contact between the fuel gas and the air to be more sufficient, leading the combustion efficiency to be improved and further reducing NO_XThe discharge amount of the burner is reduced, the fixing sleeve 13 is fixed through the bolt 14, and the gas inlet pipe 23 is fixed, so that the gas inlet pipe 23 is prevented from shaking, the maximum radius of the gas inlet cover 20 is smaller than the diameter of the burner body 1, so that part of the air flow formed by the spiral flow plate 8 enters the gas inlet cover 20 and is sprayed out through the through hole b24 to be contacted and mixed with the gas for burning operation, the other part of the air flow flows upwards through the gap between the gas inlet cover 20 and the burner body 1 and is discharged through the gas outlet 22, meanwhile, the surface of the burner body 1 can be cooled in the process of discharging the air flow through the gas outlet 22, so that the temperature of the burner body 1 is prevented from being too high during the burning operation, and the burning efficiency is improved, through the arrangement of the supporting plate 3, not only the air blower 4 can be fixedly installed, meanwhile, the supporting plate 3 is fixedly arranged among the three supporting feet 2,and then strengthen supporting legs 2, thereby strengthen supporting to combustor body 1.

Further, the inside whirl plate 8 of whirl fan housing 7 has a plurality of, and the slope of a plurality of whirl plate 8 sets up the inside wall at whirl fan housing 7, and forms whirl passageway 9 between two adjacent whirl plates 8.

In this embodiment, through setting up a plurality of whirl board 8 at whirl fan housing 7 inner wall for form the whirl through air-blower 4 drum into the air in the combustor body 1 under the effect of whirl passageway 9, thereby make the air can be rotatory ascending entering into air inlet section of thick bamboo 18, and then flow and gas contact through-hole b24 and mix, thereby promoted the inflow of air, and make the air more abundant with the gas contact, thereby promoted combustion efficiency.

Furthermore, a plurality of through holes b24 are annularly arranged on the outer surface of the top cover 17, and a plurality of through holes b24 are respectively obliquely and upwardly arranged on the outer surface of the top cover 17.

In this embodiment, through setting up through-hole b24, make the air that enters into through air-blower 4 drum under the effect of whirl board 8 in entering air inlet section of thick bamboo 18, spout and mix with the gas contact of breather pipe 11 spun via through-hole b24, thereby can carry out the burning operation, set up ascending through-hole b24 of slope simultaneously and be in order to make gas upwards spout of slope, and then with parallel spun gas contact, thereby pass through-hole b24 and enter into air inlet section of thick bamboo 18 when avoiding the gas to spout, make the combustion reaction be in a relatively safe environment.

Further, the through hole b24 on the top cover 17 is located below the gas nozzle 15 on the vent pipe 11.

In this embodiment, make through-hole b24 spun air can with the abundant mixture of gas through breather pipe 11 spun carry out combustion reaction to promote combustion efficiency, and then reduced NO_XThe amount of discharge of (c).

Further, the inside wall of fixed cover 13 and the laminating of the surface of gas intake pipe 23, fixed cover 13 is through two bolt 14 fixed mounting at the back of combustor body 1.

In this embodiment, through setting up fixed cover 13, fix fixed cover 13 through bolt 14, and then fix gas intake pipe 23 to avoid gas intake pipe 23 to take place to rock.

Further, the outer surface of the air inlet cylinder 18 is fixedly connected with four fixing columns 21, and one ends, far away from the air inlet cylinder 18, of the four fixing columns 21 are fixedly connected with the inner side wall of the burner body 1.

In this embodiment, four fixed columns 21 through the setting support fixedly to air inlet section of thick bamboo 18 to make air inlet section of thick bamboo 18 difficult for rocking and more stable in the operation process.

Further, the maximum radius of the inlet cowl 20 is smaller than the diameter of the burner body 1.

In this embodiment, the diameter that is less than combustor body 1 through the maximum radius that will admit air cover 20 sets up, thereby make the wind that forms through whirl board 8 partly enter into and admit air cover 20 through-hole b24 blowout and gas contact mix and carry out the burning operation, another part wind flows through the gap between cover 20 and the combustor body 1 that admits air and upwards flows, discharge through gas outlet 22, the air current can cool off the cooling to combustor body 1 surface through gas outlet 22 exhaust in-process simultaneously, thereby avoid combustor body 1 high temperature when the burning operation, and then combustion efficiency has been promoted.

Further, the diameter of the lower surface of the top cover 17 is larger than that of the through hole a 19.

In this embodiment, the diameter of the diameter setting of top cover 17 lower surface is larger than the diameter of through-hole a19 to can support top cover 17, and then support air inlet cylinder 18, make air inlet cylinder 18's fixed more stable with the cooperation of fixed column 21 simultaneously.

The working principle and the using process of the invention are as follows:

after the burner is installed, when the burner body 1 works, the air blower 4 is started to enable the air blower 4 to blow air into the burner body 1 through the communicating pipe 5, the air forms rotational flow to rise under the action of the rotational flow plate 8, a part of air flow enters the air inlet cylinder 18 through the air inlet cover 20 and is sprayed out through the through hole b24, meanwhile, fuel gas enters the air vent pipe 11 through the fuel gas inlet pipe 23 and is sprayed out through the fuel gas spray nozzle 15 to be uniformly mixed with the air, meanwhile, the electrode rod 16 is controlled to be ignited to carry out combustion operation, the other part of air flow flows upwards through a gap between the air inlet cover 20 and the burner body 1 and is discharged through the air outlet 22, and meanwhile, the burner body 1 is cooled in the process that the air flow is discharged through the air outlet 22.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Improve combustion efficiency and reduce NO_XThe low-nitrogen combustor comprises a combustor body (1) and is characterized in that three supporting legs (2) are welded to the lower portion of the outer surface of the combustor body (1) in an annular array mode, supporting plates (3) are welded among the three supporting legs (2), an air blower (4) is fixedly mounted on the upper surface of each supporting plate (3), the air blower (4) is electrically connected with an external power supply, an air outlet of the air blower (4) is communicated with the bottom end of a communicating pipe (5), a pipe sleeve a (6) is sleeved on the outer surface of the communicating pipe (5), the pipe sleeve a (6) is clamped on the lower surface of the combustor body (1), the communicating pipe (5) penetrates through the pipe sleeve a (6) and extends to the inside of the combustor body (1), the top end of the communicating pipe (5) is communicated with a cyclone fan cover (7), and a cyclone plate (8) is arranged on the inner wall of the cyclone fan, the upper surface welding of combustor body (1) inside wall has fixed plate (10), be provided with breather pipe (11) on fixed plate (10), the upper surface and the gas intake pipe (23) of breather pipe (11) are linked together, pipe box b (12) have been cup jointed to the surface of gas intake pipe (23), the back at combustor body (1) of pipe box b (12) joint, the surface of gas intake pipe (23) is provided with two fixed covers (13), the inner wall of breather pipe (11) is provided with gas shower nozzle (15) that are linked together with breather pipe (11), the upper surface demountable installation of fixed plate (10) has electrode bar (16)The electrode bar (16) is electrically connected with an external power supply, the upper surface of the fixed plate (10) is attached to the lower surface of the top cover (17), the lower surface of the top cover (17) is communicated with the top end of an air inlet cylinder (18), the air inlet cylinder (18) penetrates through a through hole a (19) formed in the fixed plate and extends to the lower side of the fixed plate (10), the bottom end of the air inlet cylinder (18) is communicated with the upper surface of an air inlet cover (20), and air outlets (22) are symmetrically formed in the left side surface and the right side surface of the burner body (1);

a plurality of cyclone plates (8) are arranged in the cyclone fan cover (7), the plurality of cyclone plates (8) are obliquely arranged on the inner side wall of the cyclone fan cover (7), and a cyclone channel (9) is formed between every two adjacent cyclone plates (8);

a plurality of through holes b (24) are annularly formed in the outer surface of the top cover (17), and the through holes b (24) are respectively obliquely and upwards formed in the outer surface of the top cover (17).

2. The method of claim 1 for increasing combustion efficiency and reducing NO_XThe low-nitrogen discharge burner is characterized in that the through hole b (24) on the top cover (17) is positioned below the gas nozzle (15) on the vent pipe (11).

3. The method of claim 1 for increasing combustion efficiency and reducing NO_XThe low NOx burner of emission, its characterized in that, the laminating of the surface of the inside wall of fixed cover (13) and gas intake pipe (23), fixed cover (13) are through two bolt (14) fixed mounting at the back of combustor body (1).

4. The method of claim 1 for increasing combustion efficiency and reducing NO_XThe low-nitrogen combustor of emission, its characterized in that, the surface fixed connection of air inlet section of thick bamboo (18) has four fixed columns (21), and the one end that air inlet section of thick bamboo (18) was kept away from in four fixed columns (21) all with the inside wall fixed connection of combustor body (1).

5. The method of claim 1 for increasing combustion efficiency and reducing NO_XLow-nitrogen emission burner, especiallyCharacterized in that the maximum radius of the inlet hood (20) is smaller than the diameter of the burner body (1).

6. The method of claim 1 for increasing combustion efficiency and reducing NO_XThe low-nitrogen discharge burner is characterized in that the diameter of the lower surface of the top cover (17) is larger than that of the through hole a (19).