CN110841478A - Flue gas treatment device utilizing circulating flue gas - Google Patents
Flue gas treatment device utilizing circulating flue gas Download PDFInfo
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- CN110841478A CN110841478A CN201911297058.6A CN201911297058A CN110841478A CN 110841478 A CN110841478 A CN 110841478A CN 201911297058 A CN201911297058 A CN 201911297058A CN 110841478 A CN110841478 A CN 110841478A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
- F23C9/06—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for completing combustion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
- F23C9/08—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for reducing temperature in combustion chamber, e.g. for protecting walls of combustion chamber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
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- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention provides a flue gas treatment device utilizing circulating flue gas, which can firstly recycle combustible industrial waste gas to reduce the generation amount of nitrogen oxides at the low-temperature combustion limit and change the nitrogen oxides in the flue gas into nitrogen and water to be directly discharged.
Description
Technical Field
The invention relates to the technical field of waste gas utilization and treatment, in particular to a flue gas treatment device utilizing circulating flue gas.
Background
At present, a large amount of industrial waste gas is discharged in the production process of domestic petroleum coal chemical enterprises, such as coke oven crude gas or simply treated or processed coke oven gas, blast furnace gas, coal bed gas, generator gas, city gas, biogas, calcium carbide furnace tail gas and carbon black tail gas, the industrial waste gas contains a large amount of combustible gas, most of which contains hydrogen, carbon monoxide, methane and the like which are extremely easy to burn and even deflagrate, some of which have high heat values and are directly discharged into the atmosphere after being burnt by an ignition lamp, thereby causing huge waste and serious environmental pollution, when the industrial waste gas is burnt, because the components are complex, the same waste gas has thousands of combustible components and completely different impurities, in the non-combustible components, a plurality of waste gases have components which are prohibited in environmental protection or have limited discharge amount, particularly, a large amount of nitrogen and nitrogen oxides exist in all the waste gases, if the nitrogen in the fuel gas is separated and treated, which needs great economic investment and daily treatment cost and brings great economic burden to enterprises, in order to reduce the nitrogen oxide generated in the combustion process, the flue gas recirculation and cooling combustion are adopted, in the process of adopting the flue gas recirculation combustion, part of the nitrogen is still oxidized by the instantaneous combustion temperature of hydrogen and carbon monoxide which are extremely easy to combust in the waste gas, the content of the nitrogen oxide is greatly reduced, but the content of the nitrogen oxide in the fuel gas is different, excessive nitrogen oxide still exists in some discharged flue gas, the nitrogen oxide exceeds the atmospheric emission standard to pollute the atmosphere and is limited for use, along with the improvement of the national requirement on environmental protection, the ultra-low nitrogen emission requirement far higher than the national standard has been proposed in many areas and cities, and for the ultra-low nitrogen combustion of clean fuel natural gas, flue gas recirculation is easily achieved, but for exhaust gas as a fuel, natural gas-fired approaches are not at all possible.
Disclosure of Invention
Aiming at the problems, the invention provides a flue gas treatment device utilizing circulating flue gas, which can firstly recycle combustible industrial waste gas to reduce the generation amount of nitrogen oxides at the low-temperature combustion limit, change the nitrogen oxides in the flue gas into nitrogen and water to be directly discharged, has no secondary pollution and effectively realizes standard utilization of various industrial waste gases.
The technical scheme is as follows: the utility model provides an utilize flue gas processing apparatus of circulation flue gas, is including casing and the flame pipe that is connected, be provided with waste gas admission line, combustion-supporting wind admission line, circulation flue gas admission line on the casing respectively, its characterized in that: a combined pipeline is arranged in the shell, the front end of the combined pipeline is respectively connected with a flue gas spray pipe and a waste gas spray pipe, waste gas enters from the waste gas inlet pipeline and passes through the combined pipeline and is sprayed out from the waste gas spray pipe, flue gas enters from the circulating flue gas inlet pipeline and passes through the combined pipeline and is sprayed out from the flue gas spray pipe, the front side of the combined pipeline is provided with a secondary combustion-supporting air pipe in the furnace, two ends of the secondary combustion-supporting air pipe in the furnace are respectively provided with a combustion-supporting air inlet and a combustion-supporting air outlet, the combustion-supporting air outlet of the secondary combustion-supporting air pipe in the furnace extends forwards to cross the outlet of the waste gas spray pipe, the outlet of the waste gas spray pipe is positioned outside the secondary combustion-supporting air pipe in the furnace and extends to the front end of the flame pipe, and the outlet of the flue, the combustion-supporting air pipe of stove interior secondary combustion-supporting tuber pipe will get into the combustion-supporting wind of casing falls into and is located the primary combustion-supporting wind of the interior secondary combustion-supporting tuber pipe outside of stove and is located the combustion-supporting wind of the inboard secondary of the interior secondary combustion-supporting tuber pipe of stove, be provided with ignition in the casing, the central point still sets up flue gas processing apparatus in the casing, flue gas processing apparatus includes the material spray tube, the one end of material spray tube sets up to flue gas treatment material import for let in flue gas treatment material, the other end of material spray tube sets up to flue gas treatment material export, flue gas treatment material export stretches out forward and crosses the combustion-supporting wind export of the interior secondary combustion-supporting tuber pipe.
Furthermore, the combined pipeline comprises an inner pipe and a jacket positioned on the outer side of the inner pipe, the jacket is respectively connected with the waste gas inlet pipeline and the waste gas spray pipe to form a combustible waste gas channel, and two ends of the inner pipe are respectively connected with the circulating flue gas inlet pipeline and the flue gas spray pipe to form a flue gas channel.
Furthermore, the waste gas spray pipe is annularly distributed on the outer side of the secondary combustion-supporting air pipe in the furnace, and the flue gas spray pipe is annularly distributed on the outer side of the secondary combustion-supporting air pipe in the furnace.
Furthermore, a diffusion type waste gas nozzle is arranged at the outlet of the waste gas spray pipe.
Further, when the flue gas treatment material is gas, the material nozzle is a gas nozzle; when the smoke treatment material is liquid, the material nozzle is an atomizing nozzle.
Further, the material spray pipe is arranged in the supporting protective sleeve, the supporting protective sleeve is close to one end of the smoke treatment material outlet and is provided with a high-temperature-resistant supporting protective sleeve, and the material spray pipe is close to one end of the smoke treatment material outlet and is provided with a high-temperature-resistant material spray pipe.
Furthermore, a backflow rotational flow plate is arranged at an air outlet of the secondary combustion-supporting air pipe in the furnace and used for generating backflow air which rotates towards the outer side of the secondary combustion-supporting air pipe in the furnace.
Furthermore, the ignition device comprises an ignition tube arranged in the shell, one end of the ignition tube is communicated with an ignition gas inlet, the other end of the ignition tube extends into the flame tube and is provided with an ignition and ever-burning flame nozzle, an automatic ignition element is arranged at the position of the ignition and ever-burning flame nozzle, and the ignition and ever-burning flame nozzle is close to an outlet of the waste gas spray pipe.
Furthermore, an electric waste gas regulating valve is arranged on the waste gas inlet pipeline, an electric air regulating door is arranged on the combustion-supporting air inlet pipeline, a circulating flue gas electric regulating valve is arranged on the circulating flue gas inlet pipeline, a material electric regulating valve is arranged on the flue gas treatment material inlet,
furthermore, an inspection door is arranged on the shell, and the shell and the flame tube are connected into a whole through a connecting flange.
The flue gas treatment device utilizing the circulating flue gas has the advantages that the circulating flue gas is uniformly sprayed to the periphery of the waste gas spray pipe, the waste gas is separated from air, the waste gas is diffused and diluted and then is mixed with the air for combustion, the diffusion type lag extension combustion process can be realized, the central temperature of combustion flame is reduced, the generation of nitrogen oxides is prevented, the low-nitrogen environment-friendly emission is realized, meanwhile, the flue gas combustion device is provided with the flue gas treatment device, the material spray pipe of the flue gas treatment device can directly spray ammonia water generated after heating flue gas treatment materials of ammonia gas or ammonia water or urea and a catalyst solution to the flue gas initial position at the tail part of the combustion flame and fully mix with the flue gas, so that the nitrogen oxides in the flue gas and the ammonia gas are subjected to chemical reaction, the nitrogen oxides are converted into nitrogen gas and water to be directly emitted, no, the most economical material processing amount with the least adaptability can be used, the spraying amount of the flue gas processing material can be changed according to the change of the combustion load, the processing and operating cost is greatly reduced, the standard utilization of various industrial waste gases is effectively realized, the generated heat is effectively utilized, a large amount of industrial waste gases are comprehensively utilized, the production cost of an enterprise can be reduced, the national requirements on energy conservation and emission reduction circular economy can be responded, and huge social benefits and economic benefits can be created.
Drawings
FIG. 1 is a schematic front view of a flue gas treatment plant utilizing recycled flue gas in accordance with the present invention;
FIG. 2 is a schematic side view of a flue gas treatment device utilizing recycled flue gas of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1 and 2, the flue gas treatment device using circulating flue gas of the present invention comprises a casing 1 and a flame tube 2 which are connected, wherein a waste gas inlet pipeline 3, a combustion-supporting air inlet pipeline 4 and a circulating flue gas inlet pipeline 5 are respectively arranged on the casing 1, a combined pipeline 6 is arranged in the casing 1, the front end of the combined pipeline 6 is respectively connected with a flue gas nozzle 7 and a waste gas nozzle 8, waste gas enters from the waste gas inlet pipeline 3 and passes through the combined pipeline 6 and is sprayed out from the waste gas nozzle 8, flue gas enters from the circulating flue gas inlet pipeline 5 and passes through the combined pipeline 6 and is sprayed out from the flue gas nozzle 7, an in-furnace secondary combustion-supporting air pipe 9 is arranged on the front side of the combined pipeline 6, the waste gas nozzle 8 is annularly distributed on the outer side of the in-furnace secondary combustion-supporting air pipe 9, the waste gas nozzle 6 uniformly sprays the waste gas to the periphery of the secondary combustion-, the flue gas spray pipe 7 is annularly distributed on the outer side of a secondary combustion-supporting air pipe 9 in the furnace, two ends of the secondary combustion-supporting air pipe 9 in the furnace are respectively provided with a combustion-supporting air inlet 901 and a combustion-supporting air outlet 902, the combustion-supporting air outlet 902 of the secondary combustion-supporting air pipe in the furnace extends forwards to cross over the outlet 801 of the waste gas spray pipe, the outlet 801 of the waste gas spray pipe is positioned on the outer side of the secondary combustion-supporting air pipe 9 in the furnace and extends to the front end of the flame pipe 2, the outlet 701 of the flue gas spray pipe is positioned on the outer side of the secondary combustion-supporting air pipe 9 in the furnace and is positioned on the rear side of the outlet 801 of the waste gas spray pipe, the secondary combustion-supporting air pipe 9 in the furnace divides the combustion-supporting air entering the shell 1 into primary combustion-supporting air positioned on the outer side of the secondary combustion, a smoke treatment device is further arranged at the center part in the shell and comprises a material spray pipe 10, one end of the material spray pipe 10 is provided with a smoke treatment material inlet 1001 for introducing smoke treatment materials, the other end of the material spray pipe 10 is provided with a smoke treatment material outlet 1002, the smoke treatment material outlet 1002 extends forwards to cross a combustion-supporting air outlet 902 of a secondary combustion-supporting air pipe in the furnace, a material nozzle 1003 is arranged at the smoke treatment material outlet 1002, and particularly, when the smoke treatment materials are gases, the material nozzle 1003 is a gas nozzle; when the flue gas treatment material is liquid, the material nozzle 1003 is an atomizing nozzle.
Furthermore, the combined pipeline 6 comprises an inner pipe 601 and a jacket 602 located outside the inner pipe, the jacket 602 is respectively connected with the exhaust gas inlet pipeline 3 and the exhaust gas nozzle 8 to form a combustible exhaust gas channel, and two ends of the inner pipe 601 are respectively connected with the circulating flue gas inlet pipeline 5 and the flue gas nozzle 7 to form a flue gas channel.
In this embodiment, a diffusion type exhaust nozzle 11 is disposed at the outlet 801 of the exhaust nozzle, and is used for diffusing the exhaust gas into a hollow area, diluting the hollow area with the circulating flue gas sprayed from the exhaust nozzle, mixing with air, and combusting, so that the flame area is large, and the temperature is low.
In this embodiment, the material spray pipe 10 is arranged in the supporting sheath pipe 13, one end of the supporting sheath pipe 13 close to the smoke treatment material outlet 1002 is provided with a high temperature resistant supporting sheath pipe 1301, one end of the material spray pipe 10 close to the smoke treatment material outlet 1002 is provided with a high temperature resistant material spray pipe 1004, the material spray pipe 10 conveys smoke treatment materials into a hearth, the materials are sprayed and mixed into smoke at the tail end of flame through a material nozzle, the material spray pipe 10 is divided into two parts, and the high temperature resistant material spray pipe 1004 is arranged to facilitate maintenance and replacement.
Specifically, a combustion-supporting air outlet 902 of the secondary combustion-supporting air pipe in the furnace is provided with a backflow swirling plate 14 for generating backflow air which rotates towards the outer side of the secondary combustion-supporting air pipe in the furnace by the secondary combustion-supporting air, so that unburned waste gas in the furnace is subjected to secondary combustion, flame is prevented from being condensed in the middle of peripheral combustion, and the spray pipe and the nozzle are prevented from being burnt out due to overheating.
Specifically, in this embodiment, the ignition device includes an ignition tube 1501 disposed in the housing, one end of the ignition tube 1501 is communicated with the ignition gas inlet 1502, the other end of the ignition tube 1501 extends into the flame tube and is provided with an ignition and ever-burning flame nozzle, an automatic ignition element 1503 is disposed at the position of the ignition and ever-burning flame nozzle, and the ignition and ever-burning flame nozzle is disposed near the outlet 801 of the exhaust gas nozzle.
In the present embodiment, the exhaust gas inlet pipe 3 is provided with an exhaust gas electric regulating valve 16, which can be used for regulating the air inlet amount of the exhaust gas; an electric air damper 17 is arranged on the combustion air inlet pipeline 4 and can be used for adjusting the air inflow of air; the circulating flue gas inlet pipeline 5 is provided with a circulating flue gas electric regulating valve 18 which can be used for regulating the inlet amount of circulating flue gas; be provided with material electrical control valve 19 on the material import 1001 is handled to flue gas, can be used for adjusting the entering volume of flue gas processing material, and waste gas electrical control valve 16, electrical control air door 17, circulation flue gas electrical control valve 18, material electrical control valve 19 are connected with electric actuator or servo motor respectively.
In addition, in this embodiment, the housing 1 is provided with an inspection door 20, and the housing 1 and the flame tube 2 are connected into a whole through the connecting flange 12, so that the installation and the maintenance are convenient.
The working process of the flue gas treatment device utilizing the circulating flue gas comprises the following steps: waste gas is introduced from a waste gas inlet pipeline, is diffused through a waste gas spray pipe after passing through a combined pipeline, the waste gas is uniformly sprayed to the periphery of a secondary combustion-supporting air pipe in the furnace, circulating flue gas is diffused through a flue gas spray pipe after passing through the combined pipeline, the circulating flue gas separates the waste gas from primary combustion-supporting air and diffuses and dilutes the waste gas, and then is mixed and combusted with the primary combustion-supporting air, so that a diffusion type delay and extension combustion process can be realized, the central temperature of combustion flame is reduced, the generation of nitrogen oxides is prevented, low-nitrogen environment-friendly emission is realized, then the flame is in contact combustion with the secondary combustion-supporting air, the secondary combustion-supporting air is generated by a backflow vortex plate to rotate towards the outer side of the secondary combustion-supporting air pipe in the furnace, the unburned waste gas in the furnace is subjected to secondary combustion, the flame does not gather heat in, the production of nitrogen oxides is prevented, low-nitrogen combustion and low-nitrogen environment-friendly emission are realized, in addition, a material spray pipe conveys a smoke treatment material into a hearth, the material is sprayed and mixed into smoke at the tail end of a flame through a material spray nozzle, the smoke treatment material such as ammonia gas or ammonia water or urea and a catalyst solution is heated to generate ammonia water, the ammonia water is directly sprayed to the initial position of the smoke at the tail part of the combustion flame and is fully mixed with the smoke, the nitrogen oxides in the smoke and the ammonia gas are subjected to chemical reaction, the nitrogen oxides are changed into nitrogen gas and the water to be directly discharged, and no secondary pollution exists;
meanwhile, the flue gas treatment device utilizing the circulating flue gas can adopt a dynamic control method according to the specific content of nitrogen oxides, the most economical material treatment amount with the lowest adaptability is used, the spraying amount of the flue gas treatment material can be changed according to the change of combustion load, the treatment operation cost is greatly reduced, the standard utilization of various industrial waste gases is effectively realized, the generated heat is effectively utilized, a large amount of industrial waste gases are comprehensively utilized, the production cost of an enterprise can be reduced, the national energy-saving emission-reducing circulating economy requirement can be responded, and huge social benefits and economic benefits can be created.
At present, when more users adopt the flue gas circulation combustion and can not meet the emission requirement, the denitration treatment is carried out at a flue gas outlet, but the operation cost is higher and water pollution is generated.
Claims (10)
1. The utility model provides an utilize flue gas processing apparatus of circulation flue gas, is including casing and the flame pipe that is connected, be provided with waste gas admission line, combustion-supporting wind admission line, circulation flue gas admission line on the casing respectively, its characterized in that: a combined pipeline is arranged in the shell, the front end of the combined pipeline is respectively connected with a flue gas spray pipe and a waste gas spray pipe, waste gas enters from the waste gas inlet pipeline and passes through the combined pipeline and is sprayed out from the waste gas spray pipe, flue gas enters from the circulating flue gas inlet pipeline and passes through the combined pipeline and is sprayed out from the flue gas spray pipe, the front side of the combined pipeline is provided with a secondary combustion-supporting air pipe in the furnace, two ends of the secondary combustion-supporting air pipe in the furnace are respectively provided with a combustion-supporting air inlet and a combustion-supporting air outlet, the combustion-supporting air outlet of the secondary combustion-supporting air pipe in the furnace extends forwards to cross the outlet of the waste gas spray pipe, the outlet of the waste gas spray pipe is positioned outside the secondary combustion-supporting air pipe in the furnace and extends to the front end of the flame pipe, and the outlet of the flue, the combustion-supporting air pipe of stove interior secondary combustion-supporting tuber pipe will get into the combustion-supporting wind of casing falls into and is located the primary combustion-supporting wind of the interior secondary combustion-supporting tuber pipe outside of stove and is located the combustion-supporting wind of the inboard secondary of the interior secondary combustion-supporting tuber pipe of stove, be provided with ignition in the casing, the central point still sets up flue gas processing apparatus in the casing, flue gas processing apparatus includes the material spray tube, the one end of material spray tube sets up to flue gas treatment material import for let in flue gas treatment material, the other end of material spray tube sets up to flue gas treatment material export, flue gas treatment material export stretches out forward and crosses the combustion-supporting wind export of the interior secondary combustion-supporting tuber pipe.
2. The flue gas treatment device using the circulating flue gas according to claim 1, wherein: the combined pipeline comprises an inner pipe and a jacket positioned on the outer side of the inner pipe, the jacket is respectively connected with the waste gas inlet pipeline and the waste gas spray pipe to form a combustible waste gas channel, and two ends of the inner pipe are respectively connected with the circulating flue gas inlet pipeline and the flue gas spray pipe to form a flue gas channel.
3. The flue gas treatment device using the circulating flue gas according to claim 1, wherein: the waste gas spray pipe is annularly distributed on the outer side of the secondary combustion-supporting air pipe in the furnace, and the flue gas spray pipe is annularly distributed on the outer side of the secondary combustion-supporting air pipe in the furnace.
4. The flue gas treatment device using the circulating flue gas according to claim 1, wherein: and a diffusion type waste gas nozzle is arranged at the outlet of the waste gas spray pipe.
5. The flue gas treatment device using the circulating flue gas according to claim 1, wherein: when the smoke treatment material is gas, the material nozzle is a gas nozzle; when the smoke treatment material is liquid, the material nozzle is an atomizing nozzle.
6. The flue gas treatment device using the circulating flue gas according to claim 1, wherein: the material spray pipe is arranged in the supporting protective sleeve, the supporting protective sleeve is close to one end of the smoke treatment material outlet is provided with a high-temperature-resistant supporting protective sleeve, and the material spray pipe is close to one end of the smoke treatment material outlet is provided with a high-temperature-resistant material spray pipe.
7. The flue gas treatment device using the circulating flue gas according to claim 1, wherein: and a backflow rotational flow plate is arranged at an air outlet of the secondary combustion-supporting air pipe in the furnace and used for generating backflow air which rotates towards the outer side of the secondary combustion-supporting air pipe in the furnace.
8. The flue gas treatment device using the circulating flue gas according to claim 1, wherein: the ignition device comprises an ignition pipe arranged in the shell, one end of the ignition pipe is communicated with an ignition gas inlet, the other end of the ignition pipe extends into the flame pipe and is provided with an ignition and ever-burning flame nozzle, an automatic ignition element is arranged at the position of the ignition and ever-burning flame nozzle, and the ignition and ever-burning flame nozzle is close to an outlet of the waste gas spray pipe.
9. The flue gas treatment device using the circulating flue gas according to claim 1, wherein: the waste gas treatment device is characterized in that a waste gas electric regulating valve is arranged on the waste gas inlet pipeline, an electric regulating air door is arranged on the combustion air inlet pipeline, a circulating flue gas electric regulating valve is arranged on the circulating flue gas inlet pipeline, and a material electric regulating valve is arranged on a flue gas treatment material inlet.
10. The flue gas treatment device using the circulating flue gas according to claim 1, wherein: the shell is provided with an inspection door, and the shell and the flame tube are connected into a whole through a connecting flange.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911297058.6A CN110841478A (en) | 2019-12-16 | 2019-12-16 | Flue gas treatment device utilizing circulating flue gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911297058.6A CN110841478A (en) | 2019-12-16 | 2019-12-16 | Flue gas treatment device utilizing circulating flue gas |
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| CN110841478A true CN110841478A (en) | 2020-02-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111578275A (en) * | 2020-04-03 | 2020-08-25 | 乐清市亿得利燃烧器有限公司 | Combustor with low emission of nitrogen oxides |
| CN114893996A (en) * | 2022-05-05 | 2022-08-12 | 北京龙源惟德能源科技有限公司 | Low-emission blast furnace hot blast stove flue gas recirculation denitration system |
-
2019
- 2019-12-16 CN CN201911297058.6A patent/CN110841478A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111578275A (en) * | 2020-04-03 | 2020-08-25 | 乐清市亿得利燃烧器有限公司 | Combustor with low emission of nitrogen oxides |
| CN114893996A (en) * | 2022-05-05 | 2022-08-12 | 北京龙源惟德能源科技有限公司 | Low-emission blast furnace hot blast stove flue gas recirculation denitration system |
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