CN109519939B - Coal gas diffusing device - Google Patents

Coal gas diffusing device Download PDF

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Publication number
CN109519939B
CN109519939B CN201811345466.XA CN201811345466A CN109519939B CN 109519939 B CN109519939 B CN 109519939B CN 201811345466 A CN201811345466 A CN 201811345466A CN 109519939 B CN109519939 B CN 109519939B
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inner cylinder
gas
burner
combustion chamber
cylinder
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CN201811345466.XA
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CN109519939A (en
Inventor
张仲曦
敬强富
杜体涛
李建东
童敏
麦吉昌
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Sichuan Desheng Group Vanadium Titanium Co Ltd
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Sichuan Desheng Group Vanadium Titanium Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
    • 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
    • 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
    • F23D14/66—Preheating the combustion air or gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2209/00—Specific waste
    • F23G2209/14—Gaseous waste or fumes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

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

Abstract

The invention discloses a gas diffusing device, which comprises an inner cylinder and an outer cylinder wrapped on the periphery of the inner cylinder, wherein a space is formed between the inner wall of the outer cylinder and the outer wall of the inner cylinder, annular first and second partition plates are arranged on the outer wall of the inner cylinder from bottom to top at intervals along the circumferential direction of the inner cylinder, the circumferential peripheries of the first and second partition plates are connected with the inner wall of the outer cylinder, through holes are formed in the first and second partition plates, a first combustion chamber is arranged in the area between the first and second partition plates, a second combustion chamber is arranged in the outer cylinder above the second partition plate, first and second burners are arranged in the first combustion chamber from bottom to top at intervals along the axial direction of the inner cylinder, the first burners are connected with a blast furnace gas pipe and keep a normally open flame state, and the second burners are communicated with the inner cylinder through branch pipes. The invention can reliably ignite the diffused gas, preheat the gas and air, improve the combustion sufficiency and avoid the conditions of fire dropping and flameout.

Description

Coal gas diffusing device
Technical Field
The invention relates to the technical field of gas diffusion, in particular to a gas diffusion device.
Background
The structure of a gas diffusion tower used in iron making of iron and steel enterprises is that a gas diffusion torch is arranged at the uppermost end of the diffusion tower, and most of swirlers arranged in a combustor mix gas and air through a swirler so as to achieve the effect of full combustion; through the actual use effect, the diffusing capacity of the combustion mode is very limited, the total diffusing effect is not ideal, and when the amount of diffused coal gas is large, the phenomena of fire dropping and flameout are easy to occur.
Disclosure of Invention
The invention aims to solve the technical problems and the technical task of improving the prior art, provides a gas diffusing device, and solves the problems that a diffusing tower in the prior art is easy to lose fire and extinguish when the amount of diffused gas is large.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a coal gas diffusing device comprises an inner cylinder connected with a diffusing pipe and an outer cylinder wrapped on the periphery of the inner cylinder, wherein a space is reserved between the inner wall of the outer cylinder and the outer wall of the inner cylinder, annular first and second partition plates are arranged on the outer wall of the inner cylinder from bottom to top at intervals along the circumferential direction of the inner cylinder, the peripheries of the first and second partition plates are connected with the inner wall of the outer cylinder, through holes are formed in the first and second partition plates, a first combustion chamber is arranged in the area between the first and second partition plates, a second combustion chamber is arranged in the inner space above the second partition plate, first and second burners are arranged in the first combustion chamber at intervals along the axial direction of the inner cylinder from bottom to top, a plurality of burners are distributed at intervals along the circumferential direction of the inner cylinder, the first burner is connected with a blast furnace coal gas pipe and keeps a normally open flame state, and the second burner is communicated with the inner cylinder through a branch pipe. The coal gas diffusing device provided by the invention utilizes the first burner which keeps normal open fire to ignite, when diffusing, air enters from the through hole of the first partition plate and upwards passes through the first combustion chamber and then enters the second combustion chamber through the through hole on the second partition plate, the coal gas in the diffusing pipe enters the inner barrel, a small part of the coal gas is sprayed out from the second burner through the branch pipe, the second burner is ignited under the action of the first burner which keeps normal open fire, the second burner can heat the inner barrel after being combusted in the first combustion chamber, so that the coal gas flowing through the inner barrel can be effectively preheated, most of the coal gas is sprayed out from the top outlet of the inner barrel and enters the second combustion chamber, the heat energy generated by the second burner is flushed into the second combustion chamber from the second partition plate along the first combustion chamber, so that the coal gas sprayed out from the top outlet of the inner barrel is ignited in the second combustion chamber, and the purpose of diffusing and combusting the coal gas is effectively achieved, the first burner can play a role in igniting coal gas stably, has a good diffusion effect, is not easy to generate the conditions of fire dropping and flameout, has low coal gas consumption, does not generate overhigh temperature in the diffusion intermittent period, consumes less coal gas, and is energy-saving and environment-friendly.
Furthermore, the second burner is provided with a plurality of layers at intervals from bottom to top along the axial direction of the inner barrel, and the second burner can cover a longer axial distance of the inner barrel, so that the coal gas in the inner barrel can be more fully preheated, the combustion efficiency of the coal gas is improved, the diffused coal gas can be completely combusted, and the emission pollution is reduced.
Furthermore, the second burners of adjacent layers are distributed in a staggered mode in the circumferential direction, so that preheating is more uniform.
Furthermore, the outlet direction of the second burner faces towards the inner cylinder, namely, the flame generated by the combustion of the second burner is over against the inner cylinder, so that the utilization efficiency of the heat generated by the combustion is improved, the heat acts on the inner cylinder more intensively, and the coal gas in the inner cylinder can be preheated more effectively.
Furthermore, first burner connect on first baffle to the export direction of first burner is along inner tube axial and upwards, ensures that the flame that first burner produced can be reliable and stable when diffusing ignites second nozzle spun coal gas, and the flame that first burner produced can be good plays the effect of preheating second nozzle and inner tube, improves the reliability of diffusing, avoids appearing taking off a fire, the situation of putting out a fire.
Furthermore, a middle ring plate which has a distance with the outer wall of the inner cylinder is arranged between the outer cylinder and the inner cylinder in the first combustion chamber, the second burner is fixed on the middle ring plate, the outlet direction of the second burner faces the inner cylinder, and the first burner is positioned in the area between the middle ring plate and the inner cylinder. The second burner nozzle is fixed through the middle ring plate, the stability of the second burner nozzle is guaranteed, the first combustion chamber is divided into an inner ring area and an outer ring area by the middle ring plate along the radial direction, the middle ring plate plays a role of concentrating heat, so that the heat generated by the combustion of the second burner nozzle is concentrated in the inner ring area between the inner cylinder and the middle ring plate, the heat can heat coal gas in the inner cylinder more effectively, the heat can flow to the direction of the second partition plate more intensively and more quickly and can rush into the second combustion chamber, so that the coal gas sprayed out from the top outlet of the inner cylinder can be combusted more effectively and sufficiently, air is introduced from the through hole of the first partition plate and then upwards flows along the outer ring area and passes through the through hole of the second partition plate to enter the second combustion chamber, the air is effectively preheated by the heat generated by the second burner nozzle combusted in the inner ring area when flowing through the outer ring area, the outer ring area becomes a preheating channel of the air, and the air entering the second, the coal gas with higher temperature and the air with higher temperature in the second combustion chamber can be more fully and effectively combusted, the combustion efficiency is improved, and the diffused coal gas can be ensured to be finally and completely combusted.
Furthermore, a scattering valve body for reducing the speed of the coal gas sprayed out of the inner cylinder is arranged at an outlet at the top of the inner cylinder, the scattering valve body is fixed through a supporting rib plate connected to the second partition plate, the emergent speed of the coal gas is reduced, the coal gas can be effectively combusted, the combustion speed of the coal gas is higher than the discharge speed of the air flow, so that the fire is prevented from being extinguished due to the fact that the gas flow speed is too high, meanwhile, the coal gas entering the second combustion chamber can be fully mixed with the air, the scattering valve body plays a role in blocking the coal gas sprayed out of the inner cylinder, the flow speed of the coal gas is reduced and the coal gas is dispersed and flows to the radial outer side, the air entering the second combustion chamber from the second partition plate is located at the radial outer side of the inner cylinder, the coal gas can be fully mixed with.
Furthermore, the scattering valve body is of a conical structure with a small lower part and a large upper part, coal gas sprayed out of the inner cylinder impacts the scattering valve body and scatters around along the scattering valve body, the coal gas forms a conical gas curtain surrounding the scattering valve body in the second combustion chamber, the flow rate of the coal gas is reduced, the coal gas is uniformly distributed in the second combustion chamber, air entering the second combustion chamber from the second partition plate can fully contact with the coal gas scattered by the conical gas curtain, and therefore the mixing sufficiency of the coal gas and the air can be effectively improved, and the combustion sufficiency is improved.
Furthermore, the first burner is connected with an annular gas guide pipe which is connected with a blast furnace gas pipe and surrounds the periphery of the inner cylinder, and the structure is simple and compact.
Furthermore, a plurality of supporting plates which are used for supporting the annular air guide pipe and are arranged on the periphery of the inner barrel at intervals along the circumferential direction are arranged on the periphery of the inner barrel, through holes for the annular air guide pipe to pass through are formed in the supporting plates, and the structure is stable.
Compared with the prior art, the invention has the advantages that:
the gas diffusing device can reliably ignite diffused gas, preheat the gas and air, improve the combustion efficiency, improve the combustion sufficiency, enable the diffused gas to be finally and completely combusted, has good diffusing effect, avoids the conditions of fire dropping and flameout, has small gas consumption of the first burner, can not generate overhigh temperature in the diffusing intermittent period, consumes less gas, is energy-saving and environment-friendly;
the diffused coal gas can be effectively decelerated, the mixing sufficiency of the coal gas and air is improved, the combustion sufficiency is further improved, the combustion speed of the coal gas is higher than the discharge speed of the air flow, and the phenomena that the fire is extinguished and the gas flow speed is too high are avoided.
Drawings
FIG. 1 is a schematic perspective view of a gas diffusion device;
FIG. 2 is a schematic cross-sectional view of the gas diffusing device.
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.
The embodiment of the invention discloses a gas diffusing device which can diffuse gas more safely, preheat gas and air, reduce gas flow velocity, enable combustion to be more sufficient and avoid the conditions of fire dropping and flameout.
As shown in figures 1 and 2, a coal gas diffusing device mainly comprises an inner cylinder 1 and an outer cylinder 2, wherein the inner cylinder 1 is vertically arranged, the lower end of the inner cylinder 1 is connected with a diffusing pipe 3 through a flange, the flange is a flange with a sliding groove, the connection is convenient, the sealing performance is good, the outer cylinder 2 is wrapped on the periphery of the inner cylinder 1, a distance is reserved between the inner wall of the outer cylinder 2 and the outer wall of the inner cylinder 1, the upper end of the outer cylinder 2 exceeds the upper end outlet of the inner cylinder by a certain distance, a first partition plate 4 and a second partition plate 5 are axially arranged on the outer wall of the inner cylinder 1 from bottom to top at intervals along the circumferential direction of the inner cylinder 1, the first partition plate 4 and the second partition plate 5 are annular plates perpendicular to the axial direction of the inner cylinder 1, the peripheries of the first partition plate 4 and the second partition plate 5 are connected with the inner wall of the outer cylinder 2, a plurality of through holes are circumferentially arranged on the first partition plate 4 and the second partition plate 5, a first combustion chamber, the inner space of the outer barrel 2 above the second partition plate 5 is a second combustion chamber 7, a first burner 8 and a second burner 9 are arranged in the first combustion chamber 6 from bottom to top at intervals along the axial direction of the inner barrel 1, a plurality of first burners 8 and a plurality of second burners 9 are uniformly distributed at intervals along the circumferential direction of the inner barrel 1, the first burners 8 are connected with a blast furnace gas pipe 10 and keep a normally open flame state, the second burners 9 are communicated with the inner barrel 1 through branch pipes 11, when the diffusion is carried out, the gas in the diffusion pipe enters the inner barrel, a small part of the gas is sprayed out from the second burners through the branch pipes, under the action of the first burners 8 keeping the normally open flame, the gas sprayed out from the second burners is ignited, the heat generated by the combustion of the second burners heats the inner barrel so as to preheat the gas flowing through the inner barrel, air enters the first combustion chamber from the through holes of the first partition plate and then enters the second combustion chamber through the through holes of the second partition plate, the coal gas injected into the second combustion chamber from the outlet at the upper end of the inner cylinder is mixed with air in the second combustion chamber, and the heat energy generated by the second burner is flushed into the second combustion chamber from the second partition plate along the first combustion chamber to ignite the mixed gas of the coal gas and the air in the second combustion chamber, so that the diffusion combustion of the coal gas is finally realized.
The first burner 8 is connected on the first clapboard 4, the outlet direction of the first burner 8 is upward along the axial direction of the inner barrel 1, the first burner 8 is supplied with combustion gas by an annular gas guide pipe 12 which is connected with a blast furnace gas pipe 10 and surrounds the periphery of the inner barrel 1, a plurality of branch pipes are uniformly arranged on the annular gas guide pipe 12 along the circumferential direction of the inner barrel 1 at intervals, the first burner 8 is connected on the branch pipes, the blast furnace gas pipe 10 continuously provides pure blast furnace gas, so that the first burner 8 always keeps a normal open fire state, namely keeps a combustion state in the diffusion process and the diffusion interval period, the flame temperature is 800 ℃, the gas consumption of the first burner 8 is small, and the total gas consumption of the burner is 60Nm3The first burner 8 can provide a small amount of preheating in the intermittent diffusion period to create a temperature condition for the next diffusion, a plurality of supporting plates 13 which are used for supporting the annular gas guide tube 12 and are arranged on the periphery of the inner tube 1 at intervals along the circumferential direction and are used for supporting the annular gas guide tube 12 along the radial direction of the inner tube 1 are arranged on the periphery of the inner tube 1, through holes for the annular gas guide tube 12 to pass through are formed in the supporting plates 13, and the blast furnace gas tube 10 is provided with an adjusting valve.
In order to improve the preheating effect, the second burners 9 are arranged in a plurality of layers at intervals from bottom to top along the axial direction of the inner barrel 1, and the second burners 9 of adjacent layers are distributed in a staggered manner in the circumferential direction, in the embodiment, the second burners 9 are arranged in four layers, each layer is provided with 16 burners and is uniformly distributed along the circumference of the inner barrel 1, the gas combustion consumption of the second burners 9 is changed along with the change of the amount of the diffused gas, the gas combustion consumption of the second burners 9 is about 5% of the weight of the diffused gas, and the gas consumption rate is 3000Nm3The heat generated by the combustion of the gas sprayed by the second burner 9 plays a crucial role in preheating the gas and air to improve the combustion sufficiency.
In the embodiment, a middle ring plate 14 having a distance with the outer wall of the inner cylinder 1 is arranged between the outer cylinder 2 and the inner cylinder 1 in the first combustion chamber 6, the second burner 9 is fixed on the middle ring plate 14, the outlet direction of the second burner 9 faces the inner cylinder 1, the first burner 8 is located in the area between the middle ring plate 14 and the inner cylinder 1, the middle ring plate 14 divides the first combustion chamber into an inner ring area and an outer ring area along the radial direction, firstly, the middle ring plate has the function of concentrating heat, so that the heat generated by the combustion of the second burner is concentrated in the inner ring area between the inner cylinder and the middle ring plate, the heat can heat the gas in the inner cylinder more effectively, and the heat can flow to the direction of the second partition plate more intensively and rush into the second combustion chamber, so that the gas sprayed from the top outlet of the inner cylinder can be ignited more effectively, the second burner 9 has a self-distributing function, the coal gas and the air can be sent into an inner ring area of a primary combustion chamber according to the optimal proportion, the air is introduced from a through hole of a first partition plate and then upwards flows along an outer ring area and passes through a through hole of a second partition plate to enter a second combustion chamber, the air is effectively preheated by the heat generated by a second burner burning in the inner ring area when flowing through the outer ring area, the outer ring area becomes a preheating channel of the air, so that the air entering the second combustion chamber has higher temperature, the coal gas with higher temperature and the air with higher temperature in the second combustion chamber can be more fully and effectively burnt, the combustion efficiency is improved, the diffused coal gas can be completely burnt finally, a vent hole 15 is arranged at the lower part of the outer cylinder 2 close to the first partition plate 4, more sufficient air can enter the first combustion chamber 6 and the second combustion chamber 7 through the vent hole 15, and the combustion sufficiency is improved, avoiding the occurrence of flameout.
When the diffusion is started, the second burner 9 at the lowest layer is firstly ignited by the flame of the first burner 8, hot air flow generated by the combustion of the second burner 9 rapidly rises and sequentially ignites the second burners 9 at the upper layer from bottom to top, after all the second burners 9 are ignited, a large amount of heat energy and flame are generated to rush into the second combustion chamber 7, coal gas sprayed out from the top outlet of the inner barrel 1 is ignited, and most of diffused coal gas is fully filled in the second combustion chamber 7 and then is diffused.
The second combustion chamber 7 is a main area for burning and diffusing coal gas, the inner diameter of the outer cylinder 2 is larger than that of the inner cylinder 1, the coal gas is sprayed out from the top outlet of the inner cylinder 1 and then enters the second combustion chamber 7, the second combustion chamber 7 is expanded, the flow rate of the coal gas can be reduced, the combustion speed of the coal gas is larger than the discharge speed of air flow, and accordingly fire is prevented from being extinguished due to the fact that the gas flow speed is too high. In order to further reduce the flow rate of the coal gas, a scattering valve body 16 for decelerating the coal gas sprayed out of the inner barrel 1 is arranged at the top outlet of the inner barrel 1, the scattering valve body 16 is fixed through a support rib plate 17 connected to the second partition plate 5, in the embodiment, the scattering valve body 16 is in a conical structure with a small lower part and a large upper part, the scattering valve body 16 is opposite to the top outlet of the inner barrel 1, the coal gas sprayed out of the top outlet of the inner barrel 1 impacts the scattering valve body 16, the coal gas is scattered to the periphery of the inner wall of the outer barrel 2, the coal gas forms a conical gas curtain surrounding the scattering valve body in the second combustion chamber, the flow rate of the coal gas is reduced and is scattered and flows to the radial outer side, the air entering the second combustion chamber from the second partition plate and the coal gas scattered in the conical gas curtain can be fully contacted, the mixing sufficiency of the coal gas and the air is effectively, the combustion result of the secondary combustion chamber also improves the temperature of the secondary combustion chamber, creates a thermal environment with a wider range of high temperature area, and improves the combustion sufficiency.
The outer wall of the outer barrel 2 is provided with a plurality of reinforcing rib plates 18, the reinforcing rib plates 18 are annular along the circumferential direction of the outer barrel 2, the outer barrel 2 and the reinforcing rib plates 18 are made of stainless steel materials, and the structural stability of the gas diffusing device is improved; the diffusing pipe 3 is provided with a temperature detection device, the temperature detection device is connected with an audible and visual alarm, and interlocking control is carried out when the detected temperature is higher than the preset temperature.
The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.

Claims (10)

1. The coal gas diffusing device is characterized by comprising an inner cylinder (1) connected with a diffusing pipe (3) and an outer cylinder (2) wrapped on the periphery of the inner cylinder (1), wherein a distance is reserved between the inner wall of the outer cylinder (2) and the outer wall of the inner cylinder (1), annular first partition plates (4) and annular second partition plates (5) along the circumferential direction of the inner cylinder (1) are arranged on the outer wall of the inner cylinder (1) from bottom to top along the axial direction at intervals, the peripheries of the first partition plates (4) and the second partition plates (5) are connected with the inner wall of the outer cylinder (2), through holes are formed in the first partition plates (4) and the second partition plates (5), a first combustion chamber (6) is arranged in an area between the first partition plates (4) and the second partition plates (5), a second combustion chamber (7) is arranged in the inner space of the outer cylinder (2) above the second partition plates (5), and first burners (8) are arranged in the first combustion chamber (6) from bottom to top along the axial direction of the inner cylinder (1) And the second burner (9), and first burner (8) and second burner (9) distribute a plurality of along the circumference interval of inner tube (1), first burner (8) be connected with blast furnace gas pipe (10) and keep normal naked light state, second burner (9) communicate with inner tube (1) through branch pipe (11), coal gas gets into inner tube (1) and partly spout by second burner (9) through branch pipe (11), the heat that second burner (9) burning produced heats inner tube (1) thereby preheats the coal gas of convection current through inner tube (1), the air gets into and upwards passes through first combustion chamber (6) from the through-hole of first baffle (4) and then gets into second combustion chamber (7) through the through-hole on second baffle (5).
2. The gas diffusing device according to claim 1, wherein the second burner (9) is provided with a plurality of layers at intervals from bottom to top along the axial direction of the inner cylinder (1).
3. The gas diffusing device according to claim 2, wherein the second burners (9) of adjacent layers are arranged offset in the circumferential direction.
4. The gas diffusing device according to claim 1, wherein the outlet direction of the second burner (9) is oriented toward the inner barrel (1).
5. The gas diffusing device according to claim 1, wherein the first burner (8) is connected to the first partition (4), and the outlet direction of the first burner (8) is axially and upwardly along the inner cylinder (1).
6. The gas diffusing device according to claim 1, characterized in that a middle ring plate (14) having a distance from the outer wall of the inner cylinder (1) is arranged in the first combustion chamber (6) between the outer cylinder (2) and the inner cylinder (1), the second burner (9) is fixed on the middle ring plate (14), the outlet direction of the second burner (9) faces the inner cylinder (1), and the first burner (8) is located in the area between the middle ring plate (14) and the inner cylinder (1).
7. The gas diffusing device according to claim 1, characterized in that a diffusing valve body (16) for decelerating the gas ejected from the inner cylinder (1) is arranged at the top outlet of the inner cylinder (1), and the diffusing valve body (16) is fixed by a support rib plate (17) connected to the second partition plate (5).
8. The gas diffusing device according to claim 7, wherein the diffusing valve body (16) has a tapered structure with a smaller bottom and a larger top.
9. The gas diffusing device according to claim 1, characterized in that the first burner (8) is connected to an annular gas duct (12) connected to the blast furnace gas pipe (10) and surrounding the inner cylinder (1).
10. The gas diffusing device according to claim 9, wherein a plurality of supporting plates (13) for supporting the annular gas-guide tube (12) are circumferentially arranged at intervals on the periphery of the inner cylinder (1) along the radial direction of the inner cylinder (1), and through holes for the annular gas-guide tube (12) to pass through are formed in the supporting plates (13).
CN201811345466.XA 2018-11-13 2018-11-13 Coal gas diffusing device Active CN109519939B (en)

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CN107366920A (en) * 2016-05-11 2017-11-21 北京航天动力研究所 It is a kind of to be adapted to big load, multi-state, the mix flare burner of high low heat value
CN207599703U (en) * 2017-11-22 2018-07-10 江汉大学 A kind of mixed gas ignition bleeding device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2723843Y (en) * 2004-08-30 2005-09-07 上海华力燃烧设备有限公司 Low calorific value heat storage burning torch burner
CN201636878U (en) * 2010-04-14 2010-11-17 中冶京诚（营口）装备技术有限公司 Gas stable burning device of blast-furnace gas diffusing tower
CN202188505U (en) * 2011-06-03 2012-04-11 郑州光威高科有限公司 Regenerative blast-furnace gas diffuse combustor
CN204534584U (en) * 2015-02-11 2015-08-05 上海浩用工业炉有限公司 The two preheating environmental protection burner of a kind of tubular heater
CN107366920A (en) * 2016-05-11 2017-11-21 北京航天动力研究所 It is a kind of to be adapted to big load, multi-state, the mix flare burner of high low heat value
CN207599703U (en) * 2017-11-22 2018-07-10 江汉大学 A kind of mixed gas ignition bleeding device

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