CN113587092B - A low-pressure, low-calorific value gas fuel and hydrogen mixed combustion device and method - Google Patents
A low-pressure, low-calorific value gas fuel and hydrogen mixed combustion device and method Download PDFInfo
- Publication number
- CN113587092B CN113587092B CN202110859972.6A CN202110859972A CN113587092B CN 113587092 B CN113587092 B CN 113587092B CN 202110859972 A CN202110859972 A CN 202110859972A CN 113587092 B CN113587092 B CN 113587092B
- Authority
- CN
- China
- Prior art keywords
- combustion
- supporting air
- hydrogen
- gas fuel
- central
- 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.)
- Active
Links
Classifications
-
- 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
-
- 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
- F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
- F23D14/24—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other at least one of the fluids being submitted to a swirling motion
-
- 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
- F23D14/48—Nozzles
- F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
-
- 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
- F23D14/70—Baffles or like flow-disturbing devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING 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
- F23L1/00—Passages or apertures for delivering primary air for combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q13/00—Igniters not otherwise provided for
- F23Q13/02—Igniters not otherwise provided for using gas burners, e.g. gas pokers
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pre-Mixing And Non-Premixing Gas Burner (AREA)
Abstract
本发明公开了一种低压低热值气体燃料及氢气掺混燃烧装置及方法，中心助燃风筒、气体燃料筒和主助燃风筒由内到外同轴设置，中心氢气长明灯设置于中心助燃风筒内，中心氢气长明灯出口设置于中心助燃风筒的出口处，中心氢气长明灯的出口处设有点火装置；中心助燃风筒与气体燃料筒之间在出口处设置有燃气环形旋流盘，气体燃料筒与主助燃风筒之间在出口处设置有空气环形旋流盘；氢气枪管组件枪管的出口穿过燃气环形旋流盘，枪管的出口设有氢气喷枪头；中心助燃风筒上设置有中心助燃风入口，主助燃风筒上设置有主助燃风入口，气体燃料筒上设置有气体燃料入口。本发明能够实现低压低热值气体燃烧的稳定高效燃烧，降低企业碳排放及燃料成本。
The invention discloses a low-pressure, low-calorific value gas fuel and hydrogen mixed combustion device and method, wherein a central combustion-supporting air cylinder, a gas fuel cylinder and a main combustion-supporting air cylinder are coaxially arranged from the inside to the outside, a central hydrogen pilot lamp is arranged in the central combustion-supporting air cylinder, the outlet of the central hydrogen pilot lamp is arranged at the outlet of the central combustion-supporting air cylinder, and an ignition device is arranged at the outlet of the central hydrogen pilot lamp; a gas annular swirl disk is arranged at the outlet between the central combustion-supporting air cylinder and the gas fuel cylinder, and an air annular swirl disk is arranged at the outlet between the gas fuel cylinder and the main combustion-supporting air cylinder; the outlet of the hydrogen gun barrel assembly gun barrel passes through the gas annular swirl disk, and the outlet of the gun barrel is provided with a hydrogen spray gun head; a central combustion-supporting air inlet is arranged on the central combustion-supporting air cylinder, a main combustion-supporting air inlet is arranged on the main combustion-supporting air cylinder, and a gas fuel inlet is arranged on the gas fuel cylinder. The invention can realize stable and efficient combustion of low-pressure, low-calorific value gas combustion, and reduce carbon emissions and fuel costs of enterprises.
Description
Technical Field
The invention belongs to the technical field of low-carbon low-nitrogen clean combustion of gases, and particularly relates to a low-pressure low-calorific-value gas fuel and hydrogen blending combustion device and method.
Background
The "carbon-to-peak carbon neutralization" target presents a serious challenge for enterprises (e.g., steel mills, chemical plants, etc.) with high carbon emission intensity. On the other hand, under the bidirectional driving of environmental protection and operation cost pressure, enterprises start to gradually realize the full and efficient utilization of low-heating-value gases generated in the process flow. Limited to the process, low heating value gaseous fuels contain significant amounts of non-combustible components (such as nitrogen, carbon dioxide or water vapor), whereas combustible components (such as carbon monoxide or hydrogen) are typically only about 25%, with heating values typically less than 1500kcal/Nm 3, and pressures less than 5kPa.
In order to reduce the phenomena of renewable energy sources such as wind and light abandoning, the preparation of green hydrogen from renewable energy sources becomes an important development direction, and the distributed solar hydrogen production technology is also vigorously developed. But the current hydrogen large-scale storage and transportation cost is high, the hydrogen fuel cell technology is still immature, the hydrogen consumption scene is less, the problem of on-site digestion of renewable energy hydrogen production under the current situation of difficult hydrogen storage and transportation can be solved by mixing hydrogen into the existing gas fuel for combustion, the closed-loop utilization of hydrogen for hydrogen production is realized, the carbon emission of enterprises can be reduced, and the cost of operating fuel can be reduced.
The low-pressure low-calorific-value gas fuel is low in calorific value and air pressure and generally carries part of liquid water, so that fire extinguishment is easy to occur under low load in the combustion process due to low temperature in the furnace, and the safety and normal operation of equipment such as a boiler are influenced. Studies have shown that the introduction of hydrogen into the combustion chamber via separate channels to participate in combustion can improve combustion flame stability. However, the mixing mode of the hydrogen and the low-heating-value gas, the injection position of the hydrogen and the like on the flame in the furnace are not studied in detail, and the hydrogen is extremely easy to temper in combustion due to the fast flame propagation speed. Therefore, it is necessary to develop a novel device suitable for dynamic blending non-premixed combustion of low-pressure low-calorific-value gas fuel and hydrogen so as to meet the latest emission requirements and boiler performance requirements at the same time.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a low-pressure low-heat-value gas fuel and hydrogen blending combustion device and method, which can realize stable and efficient combustion of low-pressure low-heat-value gas combustion and reduce carbon emission and fuel cost of enterprises.
In order to achieve the above purpose, the invention adopts the following technical scheme:
A low-pressure low-calorific-value gas fuel and hydrogen blending combustion device comprises a central hydrogen pilot burner, a central combustion-supporting air cylinder, a gas fuel cylinder, a hydrogen gun barrel component and a main combustion-supporting air cylinder;
The central combustion-supporting air duct, the gas fuel cylinder and the main combustion-supporting air duct are coaxially arranged from inside to outside, a central hydrogen pilot lamp is arranged in the central combustion-supporting air duct, a central hydrogen pilot lamp outlet is arranged at the outlet of the central combustion-supporting air duct, and an ignition device is arranged at the outlet of the central hydrogen pilot lamp;
a gas annular swirl disk is arranged at the outlet between the central combustion-supporting air duct and the gas fuel duct, and an air annular swirl disk is arranged at the outlet between the gas fuel duct and the main combustion-supporting air duct;
The outlet of the gun barrel of the hydrogen gun barrel component penetrates through the annular gas cyclone disc, and a hydrogen spray gun head is arranged at the outlet of the gun barrel;
the central combustion-supporting air duct is provided with a central combustion-supporting air inlet, the main combustion-supporting air duct is provided with a main combustion-supporting air inlet, and the gas fuel duct is provided with a gas fuel inlet.
Preferably, the central combustion-supporting air duct is a cylindrical barrel with a bottom at one end, the bottomless end of the central combustion-supporting air duct is an outlet, the central hydrogen pilot lamp penetrates through the bottom of the central combustion-supporting air duct and is coaxially arranged with the central combustion-supporting air duct, the spraying direction of the central hydrogen pilot lamp outlet is arranged along the radial direction of the central combustion-supporting air duct, and the central combustion-supporting air inlet is arranged at the bottom end of the central combustion-supporting air duct and is vertically connected with the central combustion-supporting air duct.
Preferably, the ignition device and the central hydrogen pilot lamp penetrate through the bottom of the central combustion-supporting air duct and extend to the outlet of the central combustion-supporting air duct.
Preferably, the gas fuel cylinder is a cylinder with one side having a bottom, the bottom of the gas fuel cylinder is circular, the bottom of the gas fuel cylinder is sleeved outside the central combustion-supporting air cylinder through the central hole, one bottomless end of the gas fuel cylinder extends to the outlet end of the central combustion-supporting air cylinder, the gas circular swirl disk is sleeved outside the central combustion-supporting air cylinder and is positioned at the outlet end of the gas fuel cylinder, the gas fuel inlet is arranged on the gas fuel cylinder and is close to the bottomed end, and the gas fuel inlet is vertically connected with the gas fuel cylinder.
Preferably, the hydrogen gun barrel component comprises a gas collecting ring and a plurality of gun barrels, the gas collecting ring is of an annular cavity structure, the gas collecting ring is sleeved at one end of the gas fuel barrel with a bottom through a center hole, one end of the gun barrel is connected with the bottom of the gas collecting ring, the other end of the gun barrel penetrates through the bottom of the gas fuel barrel, extends to an outlet of the gas fuel barrel along an annular cavity between the gas fuel barrel and a center combustion-supporting air barrel and penetrates through a gas annular swirl disk, the gun barrels are uniformly distributed along the circumferential direction of the gas fuel barrel and are parallel to the axis of the gas fuel barrel, connecting points of the gun barrels and the gas collecting ring are uniformly distributed at the bottom of the gas collecting ring, and a hydrogen inlet is formed in the side wall of the gas collecting ring in the radial direction.
Preferably, the gas annular swirling disc is movably connected between the central combustion-supporting air duct and the gas fuel cylinder, and the gas annular swirling disc is connected with a gas annular swirling disc axial adjusting rod capable of controlling the gas annular swirling disc to adjust the position along the axial direction of the gas fuel cylinder.
Preferably, the main combustion-supporting dryer includes big footpath section and path section, big footpath section is the cylinder barrel that has the bottom, the bottom of big footpath section is the ring form, big footpath section is established on the gas fuel section through the centre bore cover of a bottom, path section is the cylinder barrel without the bottom, the internal diameter of path section is greater than the external diameter of gas fuel section, the one end and the big footpath section of path section are connected in another bottom centre bore department of big footpath section, the other end of path section extends to the exit end of gas fuel section, the outside of gas fuel section is located to the annular whirl dish cover of air is located the exit end of path section, main combustion-supporting wind entry sets up in the lateral wall of big footpath section and is perpendicular with big footpath section axis.
Preferably, the connection mode of the air annular swirling disc between the gas fuel cylinder and the small-diameter section is a movable connection mode, and the air annular swirling disc is connected with an air annular swirling disc axial adjusting rod capable of controlling the air annular swirling disc to adjust the position along the axial direction of the small-diameter section.
Preferably, the rotation direction of the gas annular swirl disk can be positive rotation or negative rotation, and the swirl angle can be 15-75 degrees;
The rotation direction of the air annular swirl disk can be positive rotation or negative rotation, and the swirl angle can be 15-75 degrees;
The hydrogen spray gun head is radially and uniformly provided with a plurality of spray holes which can spray in an umbrella-shaped form, and the spray direction of the spray holes and the axial included angle of the hydrogen spray gun head are 15-75 degrees;
The outlet end of the central combustion-supporting air duct is not protruded out of the outlet end of the main combustion-supporting air duct, the outlet of the central hydrogen pilot lamp is not protruded out of the outlet end of the main combustion-supporting air duct, the hydrogen spray gun head is protruded out of the annular gas swirl disk and is not protruded out of the outlet end of the central combustion-supporting air duct, and the annular air swirl disk is not protruded out of the hydrogen spray gun head;
the central combustion-supporting air duct and the main combustion-supporting air duct are respectively provided with a flame detector and a flame observation mirror at one side of each inlet.
The invention also provides a low-pressure low-heat value gas fuel and hydrogen blending combustion method, which is carried out by adopting the low-pressure low-heat value gas fuel and hydrogen blending combustion device disclosed by the invention and comprises the following steps of:
The central combustion-supporting air enters the central combustion-supporting air cylinder from the central combustion-supporting air inlet and is sprayed out directly, flames are sprayed at the outlet of the central hydrogen pilot lamp to form an internal stable combustion area, low-pressure low-heat value gas enters the gas fuel cylinder from the gas fuel inlet and is sprayed out through the swirling diffusion of the gas annular swirling disc, main combustion-supporting air enters the main combustion-supporting air cylinder from the main combustion-supporting air inlet and is sprayed out through the swirling diffusion of the air annular swirling disc to form an annular external swirling combustion-supporting air area, hydrogen enters the hydrogen barrel assembly and is sprayed into the surrounding low-pressure low-heat value swirling gas by the hydrogen spray gun head to be fully mixed to form a swirling mixing gas area, and the mixed combustion of low-pressure low-heat value gas fuel and hydrogen is realized.
The invention has the following beneficial effects:
The invention discloses a low-pressure low-heat value gas fuel and hydrogen blending combustion device, which sequentially comprises a central combustion-supporting air duct, a gas fuel cylinder and a main combustion-supporting air duct from inside to outside, wherein a central hydrogen pilot lamp outlet is arranged at the outlet of the central combustion-supporting air duct, the outlet of a hydrogen gun barrel assembly gun barrel penetrates through a gas annular swirl disk, a hydrogen spray gun head is arranged at the outlet of the gun barrel, meanwhile, a gas annular swirl disk is arranged at the outlet between the central combustion-supporting air duct and the gas fuel cylinder, and an air annular swirl disk is arranged at the outlet between the gas fuel cylinder and the main combustion-supporting air duct. Through setting up central hydrogen pilot burner, can be with the diffusion burning of high calorific value's hydrogen, the mixed gas of low calorific value gas fuel through the blowout of gas fuel section of thick bamboo whirl and the umbrella-shaped blowout of hydrogen through the hydrogen spray gun head is lighted to realize the stable high-efficient burning of low calorific value gas burning.
Drawings
FIG. 1 is a schematic cross-sectional view of a low pressure low calorific value gaseous fuel and hydrogen blending combustion apparatus of the present invention;
FIG. 2 is a schematic top view of the low pressure low heating value gaseous fuel and hydrogen blending combustion device of the present invention;
FIG. 3 is a schematic three-dimensional isometric view of a low pressure low heating value gaseous fuel and hydrogen blending combustion device of the present invention;
FIG. 4 is a schematic view of the structure of a hydrogen lance head of the low pressure low heating value gas fuel and hydrogen blending combustion device of the invention;
Fig. 5 is a schematic rear view of the burner throat of the low pressure low heating value gas fuel and hydrogen blending combustion device of the present invention.
The device comprises a central hydrogen pilot burner 1, a central combustion-supporting air inlet 2, a main combustion-supporting air inlet 3, a gas fuel inlet 4, a hydrogen inlet 5, a central combustion-supporting air duct 6, a gas fuel cylinder 7, a main combustion-supporting air duct 8, a hydrogen gun barrel component 9, a gun barrel 9-1, a gas collecting ring 9-2, a high-energy ignition device 10, a gas annular swirl disk 11, an air annular swirl disk 12, a hydrogen spray gun head 13, an umbrella-shaped chute 13-1, a ring shrinkage structure 14, a flame detector 15, a flame observation mirror 16, a gas annular swirl disk axial adjusting rod 17 and an air annular swirl disk axial adjusting rod 18.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings and examples. The examples described in the drawings are illustrative only and are not to be construed as limiting the invention.
In order to improve the combustion stability of low-pressure low-heat value gas fuel and reduce the fuel cost and the carbon emission, the invention provides a low-pressure low-heat value gas fuel and hydrogen mixing combustion device, which is a dynamic mixing non-premixed combustion device for low-pressure low-heat value gas fuel and hydrogen, and is described below by taking the direction shown in fig. 1 as an example with reference to fig. 1,2, 3 and 4, wherein a central hydrogen pilot burner 1, a central combustion-supporting air duct 6, a gas fuel duct 7, a central combustion-supporting air duct 6 and a gas fuel duct 7 are arranged from inside to outside in a step-by-step manner, The hydrogen gun barrel assembly 9 and the main combustion-supporting air duct 8 are provided with a high-energy ignition device 10, a gas annular swirl disk 11 is arranged between the central combustion-supporting air duct 6 and the gas fuel cylinder 7 at the position of an outlet (right end) of the central combustion-supporting air duct 6, an air annular swirl disk 12 is arranged between the gas fuel cylinder 7 and the main combustion-supporting air duct 8 at the position of the outlet (right end) of the central combustion-supporting air duct, axial adjusting rods (respectively, a gas annular swirl disk axial adjusting rod 17 and an air annular swirl disk axial adjusting rod 18) are respectively arranged on two symmetrical sides of the gas annular swirl disk 11 and two symmetrical sides of the air annular swirl disk 12, the gun barrels of the hydrogen gun barrel assembly 9 penetrate through blades on the gas annular swirl disk 11, all gun barrels are uniformly distributed along the circumferential direction of the gas annular swirl disk 11, hydrogen gun heads 13 are respectively arranged at the top parts (namely the right ends) of the gun barrels, the left ends of the central combustion-supporting air duct 6 are provided with central combustion-supporting air inlets 2, the central combustion-supporting air inlets 2 are vertically connected with the side walls of the central combustion-supporting air duct 6, the left ends of the main combustion-supporting air duct 8 are provided with main combustion-supporting air inlets 3, the main combustion-supporting air inlets 3 are vertical to the combustion-supporting axes of the main combustion-supporting air duct 8, the main combustion-supporting air inlets 8, and the main combustion-supporting air duct 8 have a stepped diameter and have a large-diameter and small-diameter structure, and comprise the large-diameter sections and structures as described above; the left end of the gas fuel cylinder 7 is provided with a gas fuel inlet 4, the hydrogen gun barrel assembly 9 comprises a gas collecting ring 9-2 and a plurality of gun barrels 9-1, the gas collecting ring 9-2 is sleeved on the outer side of the left end of the gas fuel cylinder 7, the gun barrels penetrate through a sealing end cover plate (namely the annular bottom surface on the left side) of the gas fuel cylinder 7 and blades of a gas annular swirl disk 11, and the top of each gun barrel is provided with a hydrogen spray gun head 13. Referring to fig. 5, the top of the hydrogen spray gun head 13 is of a sealing structure in the axial direction, and a circle of umbrella-shaped chute which is angled with the axial direction is formed in the radial direction, wherein the angle range is 15-75 degrees. Hydrogen enters the hydrogen gun barrel assembly 9 from the hydrogen inlet 5 and is sprayed into the peripheral low-pressure low-heat value swirling gas at a high speed by an umbrella-shaped chute of the hydrogen spray gun head 13 for full mixing, so as to form a swirling mixing gas area. The gas collecting ring 9-2 is provided with a hydrogen inlet 5 on the side wall along the radial direction, the axial relative position of the gas annular swirl disk 11 and the throat of the device is regulated by two side axial regulating rods 17, the regulating distance is 0-100mm, the annular swirl disk can be positively rotated and negatively rotated, the swirl angle can be changed between 15 degrees and 75 degrees, and the swirl direction and the angle are uniquely determined during installation. The axial relative position of the air annular swirl disk 12 and the throat of the device is regulated by two side axial regulating rods 18, the regulating distance is 0-100mm, the annular swirl disk can rotate positively and negatively, the swirl angle can be changed between 15 degrees and 75 degrees, and the swirl direction and the angle are uniquely determined during installation. The central hydrogen pilot burner 1 is arranged at the axis position of the combustion device, the gun head at the top end of the pilot burner is axially sealed and is not ventilated, a plurality of nozzles are radially arranged, a high-energy ignition device 10 is arranged at the nozzle, and the high-energy ignition device 10 is positioned in the central combustion-supporting air duct 6. The central combustion-supporting air duct 6 and the left outer cover plate of the main combustion-supporting air duct 8 are respectively provided with two flame detectors 15 and fire observation mirrors 16. the central hydrogen pilot burner 1 and the hydrogen gun barrel component 9 are filled with hydrogen, the gas fuel barrel 7 is filled with low-pressure low-calorific-value gas fuel, the central combustion-supporting air barrel 6 and the main combustion-supporting air barrel 8 are filled with combustion-supporting air, a gas annular swirl disk 11 is arranged between the central combustion-supporting air barrel 6 and the gas fuel barrel 7, an air annular swirl disk 12 is arranged between the gas fuel barrel 7 and the main combustion-supporting air barrel 8, the central hydrogen pilot burner 1 and the central combustion-supporting air barrel 6 form an internal stable combustion area at the outlet of a burner throat, an annular swirl mixing gas area is formed between the central combustion-supporting air barrel 6, the gas fuel barrel 7 and the hydrogen gun barrel component 9, and an annular external swirl combustion-supporting air area is formed between the gas fuel barrel 7 and the main combustion-supporting air barrel 8.
Specifically, when the low-pressure low-calorific-value gas fuel and hydrogen blending combustion device works, central combustion-supporting air enters a central combustion-supporting air duct 6 from a central combustion-supporting air inlet 2 and is sprayed out in a direct current mode, hydrogen for ignition is sprayed out from a plurality of radial nozzles at the top end of a central hydrogen pilot lamp 1, and is ignited by a high-energy ignition device 10 to be used as the pilot lamp to form an internal stable combustion area, wherein the high-energy ignition device 10 is positioned in the central combustion-supporting air duct 6, and the whole device is in a central combustion-supporting air cooling state during operation, so that high-temperature burning loss of an igniter is avoided. The low-pressure low-calorific-value gas enters the gas fuel cylinder 7 from the gas fuel inlet 4 and then is sprayed out by the swirling diffusion of the gas annular swirling disk, and the main combustion air enters the main combustion air cylinder 8 from the main combustion air inlet 3 and then is sprayed out by the swirling diffusion of the air annular swirling disk, so that an annular external swirling combustion air area is formed;
When the low-pressure low-calorific-value gas fuel and hydrogen dynamic blending non-premixed combustion device is in operation, pilot burner flame of the inner stable combustion area diffuses to the cyclone blending gas area, the mixture of the hydrogen and the low-pressure low-calorific-value gas is ignited, and then continuously diffuses to the hearth under the action of external cyclone combustion-supporting wind, and finally complete combustion of 'gas-wind-gas-wind' layer-by-layer supporting diffusion is established.
Aiming at the problem that the fluctuation of renewable energy hydrogen production gas influences the hydrogen blending proportion, the two sides of the gas annular swirling disc 11 are provided with axial adjusting rods 17, the two sides of the air annular swirling disc 12 are provided with axial adjusting rods 18, the axial adjusting distance is 0-100mm, when the fluctuation of the input hydrogen quantity occurs, the axial relative position of the gas swirling disc 11 or the combustion-supporting air swirling disc 12 can be independently or simultaneously adjusted along the axial direction, the shape color and the flame fullness in the furnace can be intuitively observed through a flame observation mirror 16, the combustion condition can be scientifically judged through smoke monitoring emission data, and the online adjustment of the flame shape in the furnace can be realized, so that the optimal combustion state can be achieved. The hydrogen and the low-pressure low-calorific-value gas are in a non-premixed state before entering the hearth, and the mixing volume ratio of the hydrogen can be dynamically changed between 5% and 30%.
According to the invention, high-heat-value hydrogen is uniformly mixed into low-pressure low-heat-value gas fuel, a uniform mixing state is achieved under the action of swirling flow, and simultaneously, high load adjustment, hearth and fuel adaptability are achieved by adjusting the axial relative positions between the swirling flow plates, so that the purposes of reducing pollutant emission while achieving high combustion flame stability are achieved. In specific implementation, the invention provides a modification technical route for reducing cost, reducing carbon and enhancing efficiency for high-carbon emission enterprises with low-pressure low-heat value gas fuel produced by the process, enhances flame stable combustion capability of the low-pressure low-heat value gas, reduces pollutant generation, realizes dynamic matching of the shape of combustion flame and the size of a boiler hearth, effectively ensures that the boiler efficiency is not reduced, reduces carbon emission of the enterprises and reduces the cost of operating fuel. When the low-pressure low-calorific-value gas fuel and hydrogen dynamic blending non-premixed combustion device specifically works, the central hydrogen pilot lamp is firstly ignited, and high-calorific-value hydrogen is diffused and combusted along the radial direction to ignite the low-calorific-value gas fuel sprayed by the swirling flow of the gas fuel cylinder and the hydrogen mixed gas sprayed by the umbrella-shaped hydrogen spray gun head. The top end gun head of the central hydrogen pilot burner is axially sealed, a plurality of nozzles are radially arranged, hydrogen is radially outwards diffused from the nozzles at a high speed, the ignition condition is optimized, the flame stable combustion capability is enhanced, and the problems that low-heating-value gas is difficult to ignite and difficult to stably burn are solved. The hydrogen is sprayed out at high speed in an umbrella shape through the hydrogen spray gun heads uniformly distributed in the annular gas cyclone disc, so that the mixing of the hydrogen and low-pressure low-heat value cyclone gas is enhanced, the mixing of fuel and air is further enhanced by the outer ring cyclone wind, the temperature field in the furnace is uniformly distributed, the local high-temperature area is reduced, the fuel loss of incomplete combustion is reduced, and the generation of pollutants is effectively reduced. Meanwhile, due to the fluctuation of the renewable energy source hydrogen production, under different hydrogen mixing ratios, the axial positions of the gas annular swirling disc and the air annular swirling disc are adjusted through the axial adjusting rods, so that the dynamic matching of the flame shape of the burner and the size of a boiler hearth is realized, and the efficiency of the boiler is not reduced while the renewable energy source is effectively ensured to be consumed. The invention strengthens the mixing between fuel and between fuel and air, ensures uniform distribution of temperature field in the furnace, reduces local high temperature area, reduces the fuel loss of incomplete combustion and effectively reduces the generation of pollutants. Meanwhile, the dynamic matching of the flame shape of the burner and the size of the hearth of the boiler is realized under different hydrogen mixing ratios, so that the boiler efficiency is effectively ensured not to be reduced, the carbon emission of enterprises is reduced, and the running fuel cost is reduced.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (7)
1. The low-pressure low-calorific-value gas fuel and hydrogen blending combustion device is characterized by comprising a central hydrogen pilot burner (1), a central combustion-supporting air duct (6), a gas fuel cylinder (7), a hydrogen gun barrel component (9) and a main combustion-supporting air duct (8);
The central combustion-supporting air duct (6), the gas fuel cylinder (7) and the main combustion-supporting air duct (8) are coaxially arranged from inside to outside, the central hydrogen pilot lamp (1) is arranged in the central combustion-supporting air duct (6), the outlet of the central hydrogen pilot lamp (1) is arranged at the outlet of the central combustion-supporting air duct (6), and an ignition device is arranged at the outlet of the central hydrogen pilot lamp (1);
a gas annular swirl disk (11) is arranged at the outlet between the central combustion-supporting air duct (6) and the gas fuel duct (7), and an air annular swirl disk (12) is arranged at the outlet between the gas fuel duct (7) and the main combustion-supporting air duct (8);
the outlet of the gun barrel of the hydrogen gun barrel assembly (9) penetrates through the annular gas swirl disk (11), and the outlet of the gun barrel is provided with a hydrogen spray gun head (13);
A central combustion-supporting air inlet (2) is arranged on the central combustion-supporting air cylinder (6), a main combustion-supporting air inlet (3) is arranged on the main combustion-supporting air cylinder (8), and a gas fuel inlet (4) is arranged on the gas fuel cylinder (7);
the gas annular swirl disk (11) is movably connected between the central combustion-supporting air duct (6) and the gas fuel cylinder (7), and the gas annular swirl disk (11) is connected with a gas annular swirl disk axial adjusting rod (17) which can control the gas annular swirl disk (11) to adjust the position along the axial direction of the gas fuel cylinder (7);
the main combustion-supporting air duct (8) comprises a large-diameter section and a small-diameter section, the large-diameter section is a cylinder with a bottom, the bottoms of the large-diameter section are all circular, the large-diameter section is sleeved on the gas fuel cylinder (7) through a central hole at the bottom, the small-diameter section is a bottomless cylinder, the inner diameter of the small-diameter section is larger than the outer diameter of the gas fuel cylinder (7), one end of the small-diameter section is connected with the large-diameter section at the central hole at the other bottom of the large-diameter section, the other end of the small-diameter section extends to the outlet end of the gas fuel cylinder (7), an air annular swirl disk (12) is sleeved outside the gas fuel cylinder (7) and is positioned at the outlet end of the small-diameter section, and a main combustion-supporting air inlet (3) is arranged on the side wall of the large-diameter section and is perpendicular to the axis of the large-diameter section;
The air annular swirling disc (12) is movably connected between the gas fuel cylinder (7) and the small-diameter section, and an air annular swirling disc axial adjusting rod (18) capable of controlling the air annular swirling disc (12) to adjust the position along the axial direction of the small-diameter section is connected to the air annular swirling disc (12).
2. The low-pressure low-calorific-value gas fuel and hydrogen blending combustion device according to claim 1, wherein the central combustion-supporting air duct (6) is a cylinder with a bottom at one end, the bottomless end of the central combustion-supporting air duct (6) is an outlet, the central hydrogen pilot burner (1) penetrates through the bottom of the central combustion-supporting air duct (6) and is coaxially arranged with the central combustion-supporting air duct (6), the injection direction of the outlet of the central hydrogen pilot burner (1) is arranged along the radial direction of the central combustion-supporting air duct (6), and the central combustion-supporting air inlet (2) is arranged at the bottomed end of the central combustion-supporting air duct (6) and is vertically connected with the central combustion-supporting air duct (6).
3. The low-pressure low-calorific-value gas fuel and hydrogen blending combustion device according to claim 2, wherein the ignition device and the central hydrogen pilot burner (1) penetrate through the bottom of the central combustion-supporting air duct (6) and extend to the outlet of the central combustion-supporting air duct (6).
4. The low-pressure low-calorific-value gas fuel and hydrogen blending combustion device according to claim 2, wherein the gas fuel cylinder (7) is a cylinder with a bottom at one side, the bottom of the gas fuel cylinder (7) is circular, the bottom of the gas fuel cylinder (7) is sleeved outside the central combustion-supporting air cylinder (6) through a central hole, one bottomless end of the gas fuel cylinder (7) extends to the outlet end of the central combustion-supporting air cylinder (6), the gas annular swirl disk (11) is sleeved outside the central combustion-supporting air cylinder (6) and is positioned at the outlet end of the gas fuel cylinder (7), the gas fuel inlet (4) is arranged at one end, close to the bottom, of the gas fuel cylinder (7), and the gas fuel inlet (4) is vertically connected with the gas fuel cylinder (7).
5. The low-pressure low-calorific-value gas fuel and hydrogen blending combustion device according to claim 4, wherein the hydrogen barrel component (9) comprises a gas collecting ring (9-2) and a plurality of barrels (9-1), the gas collecting ring (9-2) is of an annular cavity structure, the gas collecting ring (9-2) is sleeved on one end of the gas fuel barrel (7) with a bottom through a center hole, one end of the barrel (9-1) is connected with the bottom of the gas collecting ring (9-2), the other end of the barrel (9-1) penetrates through the bottom of the gas fuel barrel (7), extends to an outlet of the gas fuel barrel (7) along an annular cavity between the gas fuel barrel (7) and a center combustion-supporting air barrel (6) and penetrates through a gas annular swirl disk (11), the barrels (9-1) are uniformly distributed along the circumferential direction of the gas fuel barrel (7) and are parallel to the axis of the gas fuel barrel (7), connection points of the barrels (9-1) and the gas collecting ring (9-2) are uniformly distributed on the bottom of the gas collecting ring (9-2), and the side wall of the gas collecting ring (9-2) is provided with a hydrogen inlet (5) along the radial direction.
6. The low pressure low heating value gaseous fuel and hydrogen blending combustion device according to claim 1, wherein:
The rotation direction of the gas annular swirl disk (11) can be positive rotation or negative rotation, and the swirl angle can be 15-75 degrees;
The rotation direction of the air annular swirl disk (12) can be positive rotation or negative rotation, and the swirl angle can be 15-75 degrees;
The hydrogen spray gun head (13) is radially and uniformly provided with a plurality of spray holes which can spray in an umbrella-shaped form, and the spray direction of the spray holes and the axial included angle of the hydrogen spray gun head (13) are 15-75 degrees;
The outlet end of the central combustion-supporting air duct (6) is not protruded out of the outlet end of the main combustion-supporting air duct (8), the outlet of the central hydrogen pilot lamp (1) is not protruded out of the outlet end of the main combustion-supporting air duct (8), the hydrogen spray gun head (13) is protruded out of the gas annular swirl disk (11) and is not protruded out of the outlet end of the central combustion-supporting air duct (6), and the air annular swirl disk (12) is not protruded out of the hydrogen spray gun head (13);
The central combustion-supporting air duct (6) and the main combustion-supporting air duct (8) are respectively provided with a flame detector (15) and a flame observation mirror (16) at one side of each inlet.
7. A low-pressure low-heating value gas fuel and hydrogen blending combustion method, which is characterized in that the method is carried out by adopting the low-pressure low-heating value gas fuel and hydrogen blending combustion device as claimed in any one of claims 1 to 6, and comprises the following steps:
the central combustion-supporting air enters a central combustion-supporting air cylinder (6) from a central combustion-supporting air inlet (2) and is sprayed out in a direct current manner, flames are sprayed at the outlet of a central hydrogen pilot lamp (1) to form an internal stable combustion area, low-pressure low-heat value gas enters a gas fuel cylinder (7) from a gas fuel inlet (4) and is sprayed out through the cyclone diffusion of a gas annular cyclone disc (11), main combustion-supporting air enters a main combustion-supporting air cylinder (8) from a main combustion-supporting air inlet (3) and is sprayed out through the cyclone diffusion of an air annular cyclone disc (12) to form an annular external cyclone combustion-supporting air area, hydrogen enters a hydrogen gun assembly (9) and is sprayed into the peripheral low-pressure low-heat value cyclone gas by a hydrogen spray gun head (13) to be fully mixed to form a cyclone mixing gas area, and low-pressure low-heat value gas fuel and hydrogen mixing combustion is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110859972.6A CN113587092B (en) | 2021-07-28 | 2021-07-28 | A low-pressure, low-calorific value gas fuel and hydrogen mixed combustion device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110859972.6A CN113587092B (en) | 2021-07-28 | 2021-07-28 | A low-pressure, low-calorific value gas fuel and hydrogen mixed combustion device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113587092A CN113587092A (en) | 2021-11-02 |
| CN113587092B true CN113587092B (en) | 2025-04-04 |
Family
ID=78251463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110859972.6A Active CN113587092B (en) | 2021-07-28 | 2021-07-28 | A low-pressure, low-calorific value gas fuel and hydrogen mixed combustion device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113587092B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114811585B (en) * | 2022-05-20 | 2023-08-11 | 无锡布尔泰能源科技有限公司 | Ultralow nitrogen combustion device based on mixed combustion of multiple gases |
| CN115479272B (en) * | 2022-08-16 | 2025-03-14 | 广东中鹏热能科技股份有限公司 | A hydrogen and natural gas mixed combustion burner |
| CN116398899B (en) * | 2023-03-09 | 2024-04-26 | 中国空气动力研究与发展中心空天技术研究所 | Centrifugal air hydrogen torch igniter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105805746A (en) * | 2016-05-12 | 2016-07-27 | 徐州科融环境资源股份有限公司 | Classified-combustion fuel gas low-nitrogen combustor |
| CN205504983U (en) * | 2016-04-01 | 2016-08-24 | 北京佳德昌科技有限责任公司 | Gas recirculation low NOx burner in combustion -supporting wind injection type stove |
| CN112113215A (en) * | 2020-10-26 | 2020-12-22 | 西安西热锅炉环保工程有限公司 | A low calorific value gas low nitrogen swirl burner with adjustable flame shape |
| CN215637167U (en) * | 2021-07-28 | 2022-01-25 | 西安西热锅炉环保工程有限公司 | Low-pressure low-heating value gas fuel and hydrogen mixing combustion device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2233836B1 (en) * | 2009-03-23 | 2015-07-29 | Siemens Aktiengesellschaft | Swirler, method for reducing flashback in a burner with at least one swirler and burner |
| EP2479491B1 (en) * | 2011-01-20 | 2014-03-26 | Fortum OYJ | Method and burner for burning lean gas in a power plant boiler |
| CN109237480A (en) * | 2018-09-07 | 2019-01-18 | 东北大学 | A kind of dedicated eddy flow cutting flame cutting torch of high-energy liquefied natural gas and application |
| CN112984508B (en) * | 2021-02-24 | 2021-12-28 | 西安交通大学 | Hydrogen injection type ammonia low-nitrogen cyclone burner |
-
2021
- 2021-07-28 CN CN202110859972.6A patent/CN113587092B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205504983U (en) * | 2016-04-01 | 2016-08-24 | 北京佳德昌科技有限责任公司 | Gas recirculation low NOx burner in combustion -supporting wind injection type stove |
| CN105805746A (en) * | 2016-05-12 | 2016-07-27 | 徐州科融环境资源股份有限公司 | Classified-combustion fuel gas low-nitrogen combustor |
| CN112113215A (en) * | 2020-10-26 | 2020-12-22 | 西安西热锅炉环保工程有限公司 | A low calorific value gas low nitrogen swirl burner with adjustable flame shape |
| CN215637167U (en) * | 2021-07-28 | 2022-01-25 | 西安西热锅炉环保工程有限公司 | Low-pressure low-heating value gas fuel and hydrogen mixing combustion device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113587092A (en) | 2021-11-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205592954U (en) | One -level gas injection type low NOx burner | |
| CN113587092B (en) | A low-pressure, low-calorific value gas fuel and hydrogen mixed combustion device and method | |
| CN103697469B (en) | The low NO of a kind of pulverized coal flame preheating xbuner system | |
| CN206112921U (en) | Multistage air distribution's low NOx burner | |
| CN106196051B (en) | A kind of tubule premixed swirl low stain gas burner | |
| CN107084390B (en) | A kind of clean gas-liquid double fuel Dual-cyclone combustor | |
| CN205504982U (en) | Gas impacted style low NOx burner | |
| CN110056873A (en) | A kind of low nitrogen combustion apparatus suitable for fuel gas with low heat value | |
| CN201521963U (en) | Low heat value gas fuel combustor | |
| CN110220190A (en) | One kind partly premixing low NOx gas burner | |
| CN114234192A (en) | Hydrogen-burning ultra-low NOx and CO emission combustor | |
| CN215637167U (en) | Low-pressure low-heating value gas fuel and hydrogen mixing combustion device | |
| CN110469847B (en) | Water-cooled fuel gas ultralow nitrogen combustion device | |
| CN109899786A (en) | Nonflame low NO and nonflame low nitrogen burning method | |
| CN115218192A (en) | A burner mixed with ammonia gas in a gas boiler | |
| CN108895446B (en) | Odd number circulation ignition high-efficiency energy-saving ultralow NO X Gas burner | |
| CN118347003B (en) | A low-nitrogen burner suitable for mixed combustion of waste gas and waste liquid under various working conditions and a combustion method thereof | |
| CN220269371U (en) | Heating furnace burner | |
| CN218237459U (en) | Ultralow nitrogen gas burner | |
| CN217763419U (en) | Regional pure oxygen fractional combustion low NOx combustor | |
| CN212657708U (en) | Multi-level air combustion-supporting ultralow-nitrogen burner | |
| RU2270402C1 (en) | Fuel burner | |
| CN213656734U (en) | A low calorific value gas low nitrogen swirl burner with adjustable flame shape | |
| RU2230257C2 (en) | Device for burning gaseous fuel | |
| CN211040961U (en) | Ultralow nitrogen gas burner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |