CN209840416U - Low-nitrogen hot blast stove - Google Patents
Low-nitrogen hot blast stove Download PDFInfo
- Publication number
- CN209840416U CN209840416U CN201821955868.7U CN201821955868U CN209840416U CN 209840416 U CN209840416 U CN 209840416U CN 201821955868 U CN201821955868 U CN 201821955868U CN 209840416 U CN209840416 U CN 209840416U
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- Prior art keywords
- smoke box
- hot
- shell
- furnace
- furnace pipe
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- Expired - Fee Related
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Abstract
The utility model discloses a low-nitrogen hot-blast furnace, including hot-blast transport body, hot-blast transport body one end is provided with preceding smoke box, and the other end of hot-blast transport body is provided with the back smoke box, hot-blast transport body includes the main casing body, the main casing is endotheca has connect the furnace pipe, the inside nitrogen oxide secondary combustion device that is provided with of furnace pipe. The utility model relates to a high-efficient low nitrogen hot-blast furnace of gas is economy, high-efficient, safe, energy-concerving and environment-protective, and its compact structure, small, take up an area of less, wholly dispatch from the factory, and the simple installation has stronger environmental protection.
Description
Technical Field
The utility model relates to the technical field of hot blast stoves.
In particular to a low-nitrogen high-efficiency hot blast stove using fuel gas.
Background
With the national requirements on environmental protection and energy conservation, hot blast stoves capable of generating clean hot air in the market at present mainly use gas fuel as a main fuel. The hot blast stove has the defects of unreasonable heating surface structure, overlarge furnace body volume, short furnace body service life, overproof nitrogen oxides and the like. In order to respond to the national call for energy conservation and environmental protection, the prior heating furnace is updated for a new round. Coal-fired and energy-consuming and heavily polluting furnaces are gradually eliminated.
Under the call of national green heating and the like, a new batch of new energy combustion furnaces, in particular to hot blast stoves, enter the market. The hot blast stove can be divided into: solid fuels, such as coal, coke; liquid fuels such as diesel, heavy oil, alcohol-based fuels; gaseous fuels, such as coal gas, natural gas. Hot blast stoves refer to devices that convert other forms of energy into heat energy of air.
Compared with the traditional system which takes electricity or steam and the like as heat sources and generates hot air by conversion, the hot blast stove has the advantages of simple structure, convenient operation and maintenance, less auxiliary equipment in the middle and the like. However, the content of nitrogen in the exhaust gas discharged by the hot blast stove in the prior art is too high, and the environment is still influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the weak point of above-mentioned conventional art, provide a hot-blast furnace that receives the hot side tissue reasonable, the furnace body is small, the furnace body is longe-lived to reduce the oxynitrides emission.
The purpose of the utility model is achieved through the following technical measures: the utility model provides a low-nitrogen hot-blast furnace, includes hot-blast conveying body, hot-blast conveying body one end is provided with preceding smoke box, and the other end of hot-blast conveying body is provided with the back smoke box, hot-blast conveying body includes the main casing body, the main casing is cup jointed the stove courage, the inside nitrogen oxide secondary combustion device that is provided with of stove courage.
As an improvement of the technical scheme: preceding smoke box includes preceding smoke box shell, the stove courage extends to preceding smoke box shell with the adjacent one end of preceding smoke box in, and the stove courage extends to the one end of preceding smoke box shell and stretches out preceding smoke box from the opposite side of preceding smoke box shell, the even winding has the stove courage fin in circumference of stove courage, the stove courage fin is extended to the other end of stove courage by the one end of stove courage.
As an improvement of the technical scheme: the stove courage stretches out the inside combustor that is provided with of one end of front smoke box, the stove courage extends to be provided with first flame retardant coating in one section week in the front smoke box shell, be provided with preceding tube sheet between front smoke box shell and the main casing body.
As an improvement of the technical scheme: one side that the main casing body was kept away from to preceding tube sheet is provided with out the cigarette subassembly, one side that the main casing body was kept away from to play cigarette subassembly is provided with preceding smoke box flame retardant coating.
As an improvement of the technical scheme: the back smoke box comprises a back smoke box shell, a cold air assembly is arranged on one side of the back smoke box shell, and a hot air communicating box is arranged on the other side of the back smoke box shell.
As an improvement of the technical scheme: the other end of the furnace pipe extends into the rear smoke box, the end part of the furnace pipe extending into the rear smoke box is connected with a rear smoke box inner pipe, and a rear tube plate is arranged at one end, adjacent to the furnace pipe, of the rear smoke box inner pipe.
As an improvement of the technical scheme: and a rear smoke box inner container fin is arranged at one end, far away from the inner container, of the rear smoke box inner container.
As an improvement of the technical scheme: a plurality of finned smoke tubes are arranged between the front tube plate and the rear tube plate, and spoilers are arranged in the finned smoke tubes.
As an improvement of the technical scheme: and one end of the front smoke box, which is close to the front tube plate, is also provided with a hot air outlet assembly.
As an improvement of the technical scheme: the preceding smoke box bottom all is provided with the supporting legs with back smoke box bottom.
Owing to adopted above-mentioned technical scheme, compare with prior art, the utility model has the advantages that: the utility model relates to a high-efficient low nitrogen hot-blast furnace of gas is economy, high-efficient, safe, energy-concerving and environment-protective, and its compact structure, small, take up an area of less, wholly dispatch from the factory, and the simple installation has stronger environmental protection.
The method has the following specific advantages:
(1) the hot blast stove is normal pressure, has no explosion hazard and is safer to use.
(2) The outer wall of the furnace pipe is provided with furnace pipe fins, so that the heating area is increased.
(3) The furnace pipe is provided with a nitrogen oxide secondary combustion device, so that excessive nitrogen is fully combusted, the emission of nitrogen oxides is reduced, and the pollution to the environment is avoided.
(4) The finned smoke tube and the spoiler combined structure increase the heating area and the heat transfer effect, and the heating effect is more obvious.
(5) And the furnace body of the hot blast furnace is small in size and easy to carry and install.
(6) The outer of the front smoke box of the hot blast stove is provided with the bag heat preservation layer, heat dissipation of the front smoke box is effectively reduced, and heat supply efficiency of the hot blast stove is improved.
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
Drawings
Fig. 1 is a schematic structural diagram of a low-nitrogen hot blast stove of the utility model.
Detailed Description
Example (b): as shown in the attached drawing 1, a low-nitrogen hot blast stove comprises a hot air conveying body, wherein one end of the hot air conveying body is provided with a front smoke box, the other end of the hot air conveying body is provided with a rear smoke box, the hot air conveying body comprises a main shell 14, a furnace pipe 1 is sleeved in the main shell 14, a nitrogen oxide secondary combustion device 7 is arranged inside the furnace pipe 1, the nitrogen oxide secondary combustion device 7 consumes nitrogen oxide in the furnace pipe 1, and the nitrogen oxide emission of the hot blast stove is reduced. The nitrogen oxide secondary combustion device 7 is of a net structure made of high-temperature refractory materials, the temperature of the net structure made of the refractory materials can reach 1500 ℃, comprehensive fuel which is not combusted in the furnace pipe 1 is combusted secondarily at the net structure, and therefore the requirement that lower excess air coefficient is achieved in exhaust gas can be met, the effect of full combustion is achieved, and the generation and content of nitrogen oxides of the exhaust gas of the furnace pipe 1 are reduced.
Preceding smoke box includes preceding smoke box shell 11, smoke box shell 11 is stretched to in the front to the one end that stove courage 1 and preceding smoke box shell 11 are adjacent, and stove courage 1 extends to the one end of preceding smoke box shell 11 and stretches out preceding smoke box from the opposite side of smoke box shell 11, the even winding in circumference of stove courage 1 has stove courage fin 21, stove courage fin 21 is by the one end of stove courage 1, extends to the other end of stove courage 1.
The inside combustor 6 that is provided with of one end that the stove courage 1 stretches out preceding smoke box, one section week that stove courage 1 extends to in the preceding smoke box shell 11 upwards is provided with first flame retardant coating 5, be provided with preceding tube sheet 2 between preceding smoke box shell 11 and the main casing body 14.
The side of the front tube plate 2 far away from the main shell 14 is provided with a smoke outlet assembly 13, and the side of the smoke outlet assembly 13 far away from the main shell 14 is provided with a front smoke box fire-resistant layer 12. A fire guiding cylinder 4 is arranged between the smoke outlet assembly 13 and the first fire-resistant layer 5. The smoke outlet assembly 13 is used for completing the flow of flame and smoke.
The back smoke box includes back smoke box shell 17, back smoke box shell 17 one side is provided with cold wind subassembly 18, back smoke box shell 17 opposite side is provided with hot-blast intercommunication case 19. And a rear smoke box seal 15 is arranged at one end of the rear smoke box shell 17 far away from the furnace pipe 1.
The other end of the furnace pipe 1 extends into the rear smoke box, the end part of the furnace pipe 1 extending into the rear smoke box is connected with a rear smoke box inner pipe 8, and a rear tube plate 3 is arranged at one end, adjacent to the furnace pipe 1, of the rear smoke box inner pipe 8.
A rear smoke box inner container fin 16 is arranged at one end, far away from the inner container 8, of the rear smoke box inner container 8, and an air cooling layer 23 is formed between the rear smoke box inner container 8 and the rear smoke box shell 17.
A plurality of finned smoke tubes 9 are arranged between the front tube plate 2 and the rear tube plate 3, and spoilers 10 are arranged in the finned smoke tubes 9.
The main shell 14 is provided with a hot air outlet assembly 20, and the hot air outlet assembly 20 is arranged at one end of the main shell 14 close to the front tube plate 2. The hot air communication box 19 and the hot air outlet assembly 20 are used for completing the flow of hot air.
The front smoke box bottom end and the rear smoke box bottom end are both provided with supporting legs 22. The supporting feet 22 support the hot blast stove.
The combustion and flue gas flow comprises the following steps: after the fuel is combusted in the furnace pipe 1, the uncombusted and sufficient gas such as nitrogen oxide in the fuel is combusted again on the nitrogen oxide secondary combustion device 7, the flue gas after the two combustion enters the rear smoke box inner container 8 arranged in the rear smoke box, passes through the finned smoke pipe 9, finally reaches the smoke outlet assembly 13 arranged on the front smoke box shell 11, and is discharged into the atmosphere.
The air flow is as follows: cold air enters the rear smoke box shell 17 through the cold air component 18, part of the cold air enters the jacket consisting of the main shell 14, the rear smoke box shell 17 and the rear smoke box inner container 8 along the cold air component 18 and then enters the rear smoke box shell 17 through the hot air communicating box 19, and the cold air is discharged out of the hot blast stove through the hot air outlet component 20 after being sufficiently heated.
The nitrogen oxide secondary combustion device 7 is a net structure made of high-temperature refractory materials, the temperature of the device can reach 1500 ℃, the device does not burn completely fuel, secondary combustion is carried out, the lower excess air coefficient can be met, full combustion is achieved, and the generation of nitrogen oxides is reduced
The utility model discloses high-efficient low nitrogen hot-blast furnace of gas is equipped with nitrogen oxide after combustion device, and nitrogen oxide is few, and the environmental protection is effectual.
The utility model discloses high-efficient low nitrogen hot-blast furnace of gas is equipped with that 1 outer wall of stove courage evenly twines and is equipped with spoiler 10 in stove courage fin 21, the fin tobacco pipe 9, should set up and has increased heat transfer area, has reduced the volume of hot-blast furnace. Secondly this hot-blast furnace is provided with the cavity in the middle of the back smoke box, and this cavity forms an air-cooled layer, does benefit to the absorption and will discharge out the flue gas temperature of hot-blast furnace, avoids thermal loss, raises the efficiency.
Claims (10)
1. The utility model provides a low nitrogen hot-blast furnace, includes hot-blast conveying body, hot-blast conveying body one end is provided with preceding smoke box, and the other end of hot-blast conveying body is provided with back smoke box, its characterized in that: the hot air conveying body comprises a main shell (14), a furnace pipe (1) is sleeved in the main shell (14), and a nitrogen oxide secondary combustion device (7) is arranged inside the furnace pipe (1).
2. The low-nitrogen hot blast stove according to claim 1, characterized in that: preceding smoke box includes preceding smoke box shell (11), in furnace pipe (1) extended to preceding smoke box shell (11) with the adjacent one end of preceding smoke box shell (11), furnace pipe (1) extended to the one end of preceding smoke box shell (11) and stretches out preceding smoke box from the opposite side of preceding smoke box shell (11), the circumference of furnace pipe (1) is gone up evenly to be twined there is furnace pipe fin (21), furnace pipe fin (21) is by the one end of furnace pipe (1), extends to the other end of furnace pipe (1).
3. A low nitrogen hot blast stove according to claim 2, characterized in that: the boiler furnace is characterized in that a combustor (6) is arranged in one end, extending out of the front smoke box, of the boiler furnace (1), a first fire-resistant layer (5) is arranged on one section of the periphery, extending into the front smoke box shell (11), of the boiler furnace (1), and a front tube plate (2) is arranged between the front smoke box shell (11) and the main shell (14).
4. A low nitrogen hot blast stove according to claim 3, characterized in that: one side that the main casing body (14) was kept away from in preceding tube sheet (2) is provided with out cigarette subassembly (13), one side that main casing body (14) was kept away from in play cigarette subassembly (13) is provided with preceding smoke box flame retardant coating (12).
5. A low nitrogen hot blast stove according to claim 3 or 4, characterized in that: the back smoke box comprises a back smoke box shell (17), a cold air assembly (18) is arranged on one side of the back smoke box shell (17), and a hot air communicating box (19) is arranged on the other side of the back smoke box shell (17).
6. A low nitrogen hot blast stove according to claim 5, characterized in that: the other end of the furnace pipe (1) extends to the lower part of the cold air assembly (18), the end part of the furnace pipe (1) extending into the rear smoke box is connected with a rear smoke box inner container (8), and a rear tube plate (3) is arranged at one end of the rear smoke box inner container (8) adjacent to the furnace pipe (1).
7. The low-nitrogen hot blast stove according to claim 6, characterized in that: one end of the rear smoke box inner container (8), which is far away from the inner container (8), is provided with a rear smoke box inner container fin (16), and an air cooling layer (23) is formed between the rear smoke box inner container (8) and the rear smoke box outer shell (17).
8. The low-nitrogen hot blast stove according to claim 7, characterized in that: a plurality of finned smoke tubes (9) are arranged between the front tube plate (2) and the rear tube plate (3), and spoilers (10) are arranged in the finned smoke tubes (9).
9. The low-nitrogen hot blast stove according to claim 8, characterized in that: the hot air outlet assembly (20) is arranged on the main shell (14), and the hot air outlet assembly (20) is arranged at one end, close to the front tube plate (2), of the main shell (14).
10. A low nitrogen hot blast stove according to claim 9, characterized in that: the bottom end of the front smoke box and the bottom end of the rear smoke box are both provided with supporting legs (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821955868.7U CN209840416U (en) | 2018-11-26 | 2018-11-26 | Low-nitrogen hot blast stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821955868.7U CN209840416U (en) | 2018-11-26 | 2018-11-26 | Low-nitrogen hot blast stove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209840416U true CN209840416U (en) | 2019-12-24 |
Family
ID=68896277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821955868.7U Expired - Fee Related CN209840416U (en) | 2018-11-26 | 2018-11-26 | Low-nitrogen hot blast stove |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209840416U (en) |
-
2018
- 2018-11-26 CN CN201821955868.7U patent/CN209840416U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191224 Termination date: 20211126 |