CN114738751A - Anti-backfire multi-burner combustor and waste gas treatment method - Google Patents
Anti-backfire multi-burner combustor and waste gas treatment method Download PDFInfo
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- CN114738751A CN114738751A CN202210364307.4A CN202210364307A CN114738751A CN 114738751 A CN114738751 A CN 114738751A CN 202210364307 A CN202210364307 A CN 202210364307A CN 114738751 A CN114738751 A CN 114738751A
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- 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
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- 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
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- 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
- F23D14/48—Nozzles
- F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
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- 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
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- 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
- F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
- F23D14/82—Preventing flashback or blowback
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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
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- 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)
- Incineration Of Waste (AREA)
Abstract
The invention discloses an anti-backfire multi-burner combustor and a waste gas treatment method. The burner comprises a burner body, wherein the burner body comprises a heat exchange cavity, and a first pipeline for introducing waste gas, a second pipeline for introducing fuel gas and a third pipeline for introducing combustion-supporting air are arranged at the bottom of the burner body; the first pipeline is connected with a plurality of waste gas branch pipes, the waste gas branch pipes extend upwards to the top of the burner main body, and waste gas outlets of the waste gas branch pipes are provided with waste gas burner nozzles; the second pipeline is connected with a plurality of fuel gas branch pipes, the fuel gas branch pipes extend upwards to the top of the burner main body, and a burner fire nozzle is arranged at a fuel gas outlet of each fuel gas branch pipe; and a combustion-supporting air outlet for delivering combustion-supporting air is formed in the top of the burner main body. The burner of the invention ensures that the temperature of the flame is not transferred to the amount of the exhaust gas, no backfire occurs, and the exhaust gas pipeline is not ignited.
Description
Technical Field
The invention relates to the field of petrochemical waste gas purification, in particular to an anti-backfire multi-burner combustor and a waste gas treatment method.
Background
The burner is a key part of a gas/exhaust gas combustion device, and is commonly used in various combustion-related industrial facilities, such as direct-fired boilers, regenerative combustion devices, garbage incinerators, and exhaust gas turbines. The combustor with good performance can reasonably organize the mixing of fuel and oxidant (such as air), realize safe and stable combustion, and ensure sufficient combustion efficiency and pollutant emission standard. For some special petrochemical devices, the requirements of flexible adjustment of flame length, combustion initiation temperature, heating temperature and heat load are also met. The mixing manner of the gas fuel and the air can be classified into three types, i.e., diffusion combustion, partially premixed combustion, and fully premixed combustion. The air supply method can be divided into several types, such as an injection type burner, a blast type burner, and a natural induced draft type burner. It can be divided into low heat value burner and high heat value burner according to the heat value of fuel gas. The gas and air mixing sites can be divided into an external mixing burner and an internal mixing burner. According to the speed of flue gas outlet, it can be divided into low-speed burner and high-speed burner. The nozzle flow velocity of the low-speed combustor is lower than 50 m/s; the nozzle flow velocity of the high-velocity burner is higher than 50m/s, typically 200 and 300 m/s.
The totally premixed formula combustor is owing to mix gas and air in advance, gets into the combustion chamber, and gas and air misce bene better burn, and the burning is more steady, and the incomplete combustion that produces is less, because the pressure that the burning used is lower, does not need or needs the combustion-supporting of low pressure fan. When the flow rate of the completely premixed burner is low, the tempering is easy to occur, so that the requirements on the heat value and the density of fuel gas before design are strict, the regulation is small, and the completely premixed burner is used as an anti-tempering device; the heat load of a single combustor is small; the noise is greater, especially at high pressure and high load operation.
The partial premixing burner mixes a part of air (primary air accounts for 20% -80%) before burning, a part of mixed burning-air mixture is directly burnt after leaving the burner, and the rest of fuel gas is burnt by diffusion mixing with surrounding air. Partial premix burners are typically designed as a single nozzle (e.g., a straight tube) and are prone to misfire or flameout problems when the combustion load is high. It is also possible to design the nozzle head in the form of a multi-fire hole, but with a higher pressure.
The diffusion combustion method separates air and fuel before combustion, and supplies air during combustion, and the fuel and air are mixed and combusted at a contact surface. The air supply method can be divided into a self-ignition induced air and a forced air supply method. The natural induced draft type is mostly used for civil use, the jet speed of the nozzle is low, and the investment is small. The forced-air combustion mode is mainly applied to industrial application, and the combustor comprises a complex cyclone structure, needs forced air, and has higher design and manufacturing cost and more stable combustion effect.
The specific range of the burner is waste gas treatment in petrochemical enterprises, the components in the waste gas contain part of air accounting for 0-98%, the combustible components in the waste gas are less, the part of the waste gas is in the non-spontaneous combustion, combustible and explosive regions, and the combustion mode is a diffusion combustion mode, a partial premixed combustion mode and a full premixed combustion mode. When deflagration occurs, backfire is easy to occur, so a stable and safe combustion mode is needed, and accidents are reduced.
Waste gas from petrochemical enterprises. The waste gas of petrochemical enterprises has complex components, air accounts for 0-98%, the other components account for 0.5-10%, the components are complex, hydrogen, methane, ethane to diesel oil components can exist, and the explosion range of each component is different. Due to the complex components of the waste gas, the existing combustion modes have the problems of incomplete combustion technology or combustion applicability. It is desirable to find a suitable burner which can be safely used also in the explosive range. Therefore, the novel combustor which has the advantages of adjustable load, relatively low manufacturing cost, flexible and convenient operation, environmental protection index meeting and wide-proportion adaptation is designed, and the novel combustor has important significance for developing industrial environment-friendly equipment.
Disclosure of Invention
The purpose of the invention is as follows: in order to solve the problems in the prior art, the invention provides the anti-backfire multi-burner, which ensures that the temperature of flame is not transferred to the amount of waste gas, backfire does not occur, and a waste gas pipeline is not ignited. The invention also provides a method for treating waste gas by using the anti-backfire multi-burner.
The technical scheme is as follows: the invention relates to an anti-backfire multi-burner which comprises a burner main body, wherein the burner main body comprises a heat exchange cavity, and the bottom of the burner main body is provided with a first pipeline for introducing waste gas, a second pipeline for introducing fuel gas and a third pipeline for introducing combustion-supporting air; the first pipeline is connected with a plurality of waste gas branch pipes, the waste gas branch pipes extend upwards to the top of the burner main body, and waste gas outlets of the waste gas branch pipes are provided with waste gas burner nozzles; the second pipeline is connected with a plurality of fuel gas branch pipes, the fuel gas branch pipes extend upwards to the top of the burner main body, and a burner fire nozzle is arranged at a fuel gas outlet of each fuel gas branch pipe; and a combustion-supporting air outlet for sending out combustion-supporting air is formed in the top of the combustor main body.
In a preferred structure of the present invention, the fuel gas branch pipes are spaced between the exhaust gas branch pipes.
As a preferable structure of the present invention, the first pipe is coiled at the bottom of the burner body into a waste pipe bundle, which is communicated with each waste pipe branch.
As a preferable structure of the present invention, the second pipe is coiled at the bottom of the burner body into a bundle of fuel gas pipes, which communicates with each fuel gas branch pipe.
As a preferable structure of the present invention, the third pipe has a cylindrical structure.
As a preferred structure of the present invention, the bundle of fuel gas tubes is disposed above the bundle of flue gas tubes.
As a preferred structure of the present invention, the burner nozzle includes a multi-hole type nozzle and an automatic ignition device.
As a preferable structure of the present invention, the waste gas burner includes a venturi and a flame arrester disposed at a top end of the waste gas burner.
The invention relates to a method for treating waste gas by using the anti-backfire multi-burner combustor, which comprises the following steps of:
(S1) when the device is started, firstly, combustion-supporting air enters the burner body to purge the equipment for 5-10 minutes;
(S2) after the purging is finished, igniting the igniter, enabling the fuel gas pipeline to enter the combustor and throw fuel gas, and igniting the fuel gas; if the fuel gas can not be ignited, closing the fuel gas and restarting the equipment;
(S3) after the fuel gas is ignited, adjusting the temperature rising speed of the furnace, when the temperature in the furnace rises to above 650 ℃, throwing the waste gas, enabling the waste gas to enter a burner ejection opening from a waste gas channel, and igniting the waste gas at high temperature.
Has the advantages that: (1) according to the invention, through the arrangement of the main structure of the combustor, heat exchange is carried out between the waste gas and the combustion-supporting air, the cold combustion-supporting air cools the waste gas, the multiple Venturi tube bundles are arranged at the end of the waste gas, the heat exchange area is increased, the temperature of the waste gas is reduced more thoroughly than that of the conventional fuel gas, the temperature of the waste gas is lower than the ignition point, and the combustor has the functions of fire retardance and flame retardance. (2) The burner ensures the safety of waste gas combustion, and ensures that the temperature of flame is not transferred to the waste gas amount through the waste gas with flow velocity and the low-temperature control and fire-retardant performance increase of the waste gas, so that tempering is not generated, and a waste gas pipeline is not ignited.
Drawings
FIG. 1 is a schematic view of the anti-backfire multi-burner of the present invention;
FIG. 2 is a schematic view of the exhaust burner arrangement of the present invention;
FIG. 3 is a schematic view of the burner tip distribution of the fuel gas of the present invention;
FIG. 4 is a schematic view of the exhaust burner and venturi structure in the burner nozzle of the present invention.
Detailed Description
Example 1: referring to fig. 1, the invention discloses an anti-backfire multi-burner, the media of the burner are fuel gas, waste gas and air, and the burner is a combination of combustion of three media and combustion supporting. The combustor comprises a combustor main body 1, the combustor main body 1 comprises a heat exchange cavity 100, a first pipeline 2 for introducing waste gas, a second pipeline 3 for introducing fuel gas and a third pipeline 4 for introducing combustion-supporting air are arranged at the bottom of the combustor main body 1, in the embodiment, the third pipeline 4 is of a cylindrical structure, and a combustion-supporting air outlet 401 for sending combustion-supporting air is arranged at the top of the combustor main body 1. The pipeline of the invention is made of various materials, wherein the materials of the fuel gas and the waste gas are stainless steel and ultrahigh temperature resistant materials; the material of the combustion-supporting air path is stainless steel or carbon steel. The furnace body of the burner main body is made of carbon steel; the branch pipeline is made of stainless steel.
The first pipeline 2 is connected with a plurality of waste gas branch pipes 201, the waste gas branch pipes 201 extend upwards to the top of the burner main body 1, the top of the waste gas branch pipes 201 is a waste gas outlet 202, a waste gas burner nozzle 203 and a burner nozzle are arranged at the waste gas outlet 202 of the waste gas branch pipes 201, the first pipeline 2 is coiled into a waste gas pipe bundle 204 at the bottom of the burner main body 1, the waste gas pipe bundle 204 is communicated with each waste gas branch pipe 201, and a waste gas inlet 205 is arranged at the inlet of the first pipeline 2. As shown in fig. 4, the exhaust gas burner 203 comprises a venturi 5 and a flame arrester 206 disposed at the top end of the exhaust gas burner 203, and an exhaust gas flow passage 207 is formed between the venturi 5 and the flame arrester 206.
A plurality of fuel gas branch pipes 301 are connected to a second pipeline 3, the fuel gas branch pipes 301 extend upwards to the top of a burner main body 1, a multi-hole type nozzle 305 is arranged at a fuel gas outlet 302 of the fuel gas branch pipes 301, the multi-hole type nozzle 305 is arranged at the top end of a burner fire nozzle 303, the multi-hole type nozzle 305 is in an umbrella-shaped structure, and a plurality of combustion holes for jetting fuel gas are arranged around the umbrella-shaped structure. The second tubes 3 are coiled at the bottom of the burner body 1 into bundles 304 of fuel gas tubes, which are in communication with each fuel gas branch pipe 301 through the bundles 304 of fuel gas tubes. The gas side of the fuel gas manifold 301 includes conventional auto-ignition means (not shown) in addition to the multi-hole type nozzle 305, the multi-hole structure is located at the gas outlet section of the fuel gas manifold 301, the ignition means is located beside the multi-hole structure nozzle, the burner nozzle 203 has a multi-hole type nozzle with auto-ignition function, and the fuel gas enters the fuel gas flow passage 306 through the venturi structure 5 located on the fuel gas manifold 301, and then enters the multi-hole type nozzle 305 to be auto-ignited.
In a preferred structure of this embodiment, the fuel gas branch pipes 301 are spaced apart from the exhaust gas branch pipe 201, and the third duct 4 for feeding combustion air (air) according to the present invention has a straight tubular structure. The invention realizes the heat exchange between the air end and the waste gas and the fuel gas through the pipeline arrangement of the fuel gas, the combustion-supporting gas and the waste gas, and balances the heat of three paths. Because the flow velocity of the exhaust gas is greater than the backfire combustion velocity of the flame, the burner has an anti-backfire function. Waste gas and combustion air carry out the heat transfer, and cold combustion air cools down waste gas, and many venturi bundles of waste gas end, heat transfer area increase, and the waste gas temperature reduces more thoroughly than conventional fuel gas, and the waste gas temperature is less than the ignition point, and the combustor has back-fire relief, fire-retardant function.
As a preferred structure of the present invention, the combustion plate of the flue gas is located above the venturi bundle, the combustion plate is formed by winding a plurality of metal plates, the gap between the metal plates is very small, and the flow velocity of the flue gas therein is also fast; the channel area between the metal plates is large, heat transfer is enhanced, the temperature of flame is reduced to be below the ignition point, the flame is prevented from spreading to fuel gas, and the effects of fire resistance and backfire prevention are achieved. The burning disk of the waste gas has certain thickness, and the two sides of the channel between the metal plates are called channel walls, and the thicker the burning disk is. The combustion and explosion are not direct intermolecular reaction, but are excited by external energy, molecular bonds are destroyed to generate activated molecules, the activated molecules are split into short-lived but very active free radicals, the free radicals collide with other molecules to generate new products, and meanwhile, new free radicals are generated to continue to react with other molecules. As the burning combustible gas passes through the narrow, long passage of the flame retardant element, the probability of collision of free radicals with the passage wall increases and the free radicals participating in the reaction decrease. When the passage of the flame arrester is narrow to a certain extent, the collision of free radicals with the passage wall is dominant, and the reaction can not continue because the number of free radicals is reduced sharply, namely the combustion reaction can not continue to propagate through the combustion disc, thereby playing a role in arresting the flame.
In the burner, the waste gas section burns at high speed, the normal flow velocity is more than 50m/s, and the minimum flow velocity is 15 m/s. The flow velocity of the waste gas entering the Venturi throat from the waste gas outlet end of the first pipeline 2 is more than 15m/s, the Venturi tube bundle has an automatic control adjusting function, the number of the waste gas branch pipes 201 for introducing the waste gas is adjusted under the condition of meeting the flow rate of 5-110%, and the flow velocity in the Venturi throat for introducing the waste gas meets the flow velocity requirement of more than 15 m/s.
The specific implementation method of the burner comprises the following steps: when the device is started, firstly, combustion-supporting air enters the equipment to purge the equipment, and the purging time is 5-10 minutes. After purging is finished, an igniter is ignited, a fuel gas pipeline enters a combustor and fuel gas is input, and the fuel gas is ignited; if the fuel gas can not be ignited, closing the fuel gas and restarting the equipment; after the fuel gas is ignited, the temperature rising speed of the furnace is adjusted, when the temperature in the furnace rises to above 650 ℃, waste gas is thrown in, the waste gas enters the outlet at the top end of the burner from the waste gas channel, the waste gas is ignited at high temperature, and the whole combustion hearth has flame with higher length because the flow speed of the waste gas is faster. Because the speed of the combustion-supporting air is low, the speed difference is formed between the combustion-supporting air and the flow speed of the waste gas and the fuel gas, the gas flow state of the hearth can form turbulent flow, and the ignition degree and the combustion efficiency are increased.
The effect is as follows: the whole temperature of the combustion chamber is controlled to 760-820 ℃, and the non-methane total hydrocarbon is controlled to not more than 20mg/m under the condition that the combustion time is not less than 2S3And the content of NOx is controlled to not more than 50mg/m3The content index is calculated by the 3 percent oxygen content in GB31570 and GB31571 standards.
After combustion, the removal rate of the non-methane total hydrocarbon is more than 99 percent, and the requirements of national standards GB31570 and GB31571 are met.
The system of the invention distributes the whole into a symmetrical structure through the composition, flow state layout, flow rate design and hardware composition of fuel gas, waste gas and combustion-supporting air and the Venturi devices arranged at the outlet ends of the fuel gas and the waste gas, as shown in figures 2 and 3, the fuel gas: the tube bundle ratio of the exhaust gas is 1: 6-20; waste gas enters the combustion chamber through the fire retardant device, so that the temperature of flame is not transferred to the waste gas amount, the tempering is not generated, and the waste gas pipeline is not ignited
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (9)
1. The anti-backfire multi-burner is characterized by comprising a burner main body (1), wherein the burner main body (1) comprises a heat exchange cavity (100), and a first pipeline (2) for introducing waste gas, a second pipeline (3) for introducing fuel gas and a third pipeline (4) for introducing combustion-supporting air are arranged at the bottom of the burner main body (1); a plurality of waste gas branch pipes (201) are connected to the first pipeline (2), the waste gas branch pipes (201) extend upwards to the top of the burner main body (1), and waste gas burners (203) are arranged at waste gas outlets (202) of the waste gas branch pipes (201); a plurality of fuel gas branch pipes (301) are connected to the second pipeline (3), the fuel gas branch pipes (301) extend upwards to the top of the burner main body (1), and a burner fire nozzle (303) is arranged at a fuel gas outlet (302) of each fuel gas branch pipe (301); and a combustion-supporting air outlet (401) for sending out combustion-supporting air is arranged at the top of the burner main body (1).
2. The flashback-resistant, multi-burner of claim 1, wherein the fuel gas branch pipes (301) are spaced apart between the flue gas branch pipes (201).
3. The anti-backfire multi-burner according to claim 2, wherein the first duct (2) is coiled at the bottom of the burner body (1) into a flue gas tube bundle (204), the flue gas tube bundle (204) communicating with each of the flue gas branch pipes (201).
4. The temper resistant multi-burner according to claim 3, wherein said second duct (3) is coiled into a bundle of fuel gas tubes (304) at the bottom of the burner body (1), said bundle of fuel gas tubes (204) communicating with each of said fuel gas branch pipes (301).
5. The anti-backfire multi-burner according to claim 1, characterized in that said third duct (4) is of cylindrical structure.
6. The temper resistant multi-burner combustor as claimed in claim 4, wherein said bundle of fuel gas tubes (304) is disposed above said bundle of flue gas tubes (204).
7. The flashback-resistant, multi-burner of claim 1, wherein the burner tip (303) includes a multi-orifice nozzle (305) and an auto-ignition device.
8. The anti-backfire multi-burner according to claim 1, wherein the waste gas burner (203) comprises a venturi and a flame arrester device (206) arranged at the top end of the waste gas burner (203).
9. A method of exhaust gas treatment using the flashback-resistant, multi-burner of claim 1, comprising the steps of:
(S1) when the device is started, firstly, combustion-supporting air enters the burner body to purge the equipment for 5-10 minutes;
(S2) after the purging is finished, igniting the igniter, enabling the fuel gas pipeline to enter the combustor and throw fuel gas, and igniting the fuel gas; if the fuel gas can not be ignited, closing the fuel gas and restarting the equipment;
(S3) after the fuel gas is ignited, adjusting the temperature rising speed of the furnace, when the temperature in the furnace rises to above 650 ℃, throwing the waste gas, enabling the waste gas to enter a burner ejection opening from a waste gas channel, and igniting the waste gas at high temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210364307.4A CN114738751A (en) | 2022-04-07 | 2022-04-07 | Anti-backfire multi-burner combustor and waste gas treatment method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210364307.4A CN114738751A (en) | 2022-04-07 | 2022-04-07 | Anti-backfire multi-burner combustor and waste gas treatment method |
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| CN114738751A true CN114738751A (en) | 2022-07-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115789638A (en) * | 2022-11-29 | 2023-03-14 | 岳阳钟鼎热工电磁科技有限公司 | Full premix type flameless combustion system for pure oxygen combustion |
-
2022
- 2022-04-07 CN CN202210364307.4A patent/CN114738751A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115789638A (en) * | 2022-11-29 | 2023-03-14 | 岳阳钟鼎热工电磁科技有限公司 | Full premix type flameless combustion system for pure oxygen combustion |
| CN115789638B (en) * | 2022-11-29 | 2024-02-13 | 湖南钟鼎热工科技股份有限公司 | Full-premix pure oxygen combustion flameless combustion system |
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