CN214064878U - Three-return steam boiler - Google Patents
Three-return steam boiler Download PDFInfo
- Publication number
- CN214064878U CN214064878U CN202023088502.4U CN202023088502U CN214064878U CN 214064878 U CN214064878 U CN 214064878U CN 202023088502 U CN202023088502 U CN 202023088502U CN 214064878 U CN214064878 U CN 214064878U
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- China
- Prior art keywords
- combustion chamber
- return
- steam boiler
- pipe
- triple
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- 238000002485 combustion reaction Methods 0.000 claims abstract description 36
- 239000000779 smoke Substances 0.000 claims abstract description 11
- 239000012535 impurity Substances 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 238000007689 inspection Methods 0.000 claims description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 24
- 239000003546 flue gas Substances 0.000 abstract description 24
- 239000007789 gas Substances 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 239000000446 fuel Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The utility model discloses a three return stroke steam boiler, including the combustion chamber, the outer parcel of combustion chamber has the stove courage, the combustion chamber tip is provided with the back combustion chamber, the back combustion chamber communicates with each other with second return stroke tube bank, second return stroke tube bank still communicates with each other there is preceding smoke box, preceding smoke box communicates with each other with flue gas recirculation pipe, second return stroke tube bank includes multilayer second return stroke pipe, just second return stroke pipe is the screw thread tubulose. The utility model discloses can effectual improvement gas utilization efficiency, reduce use cost.
Description
Technical Field
The utility model relates to a boiler especially relates to a three return stroke steam boiler.
Background
The boiler is an energy converter, which is a device for heating working medium water or other fluids to certain parameters by using heat energy released by fuel combustion or other heat energy.
The single-return or double-return steam boiler is mainly used in the existing industrial production, the discharge rate of high-temperature waste gas generated by combustion is high, the exhaust temperature of the waste gas is high, the thermal efficiency of the boiler is low, and the heat released by fuel is not fully utilized, so that the use cost of the boiler is high.
Therefore, the technical personnel in the field are dedicated to developing a three-pass steam boiler which can effectively improve the utilization efficiency of fuel gas and reduce the use cost.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned defect of prior art, the utility model aims to solve the technical problem that a three-pass steam boiler is provided, can effectual improvement gas utilization efficiency, reduce use cost.
In order to achieve the purpose, the utility model provides a three return stroke steam boiler, including the combustion chamber, the outer parcel of combustion chamber has the stove courage, the combustion chamber tip is provided with the back combustion chamber, the back combustion chamber communicates with each other with second return stroke tube bank, second return stroke tube bank still communicates there is preceding smoke box, preceding smoke box communicates with each other with flue gas recirculation pipe, second return stroke tube bank includes multilayer second return stroke pipe, just second return stroke pipe is the screw thread tubulose.
High-temperature flue gas generated by boiler combustion sequentially passes through the combustion chamber, the second return tube bundle and the flue gas recirculation tube to form a three-return boiler, so that the contact area of the flue gas and boiler water is effectively increased, and the flue gas heat exchange efficiency is improved.
Furthermore, the spiral directions of the second return pipes of two adjacent layers are opposite, and a gap exists between the second return pipes of two adjacent layers.
The second return pipe is the heliciform, and adjacent two-layer the spiral opposite direction of second return pipe can further increase the area of contact of high temperature gas and boiler water, improves gas utilization efficiency.
Furthermore, tube plates are mounted at two ends of the second return tube bundle.
The tube sheet is used for fastening the end part of the second return tube bundle, so that high-temperature flue gas is distributed conveniently, and partial high local temperature and poor overall heat transfer efficiency caused by overlarge flue gas quantity of the second return tube are prevented.
Furthermore, an impurity removing device is arranged in the burning chamber close to the second return pipe bundle.
Because the second return pipe is spiral, the requirement on the cleanliness of flue gas is high, and the impurity removing device can effectively prevent the second return pipe from being blocked.
Furthermore, the recirculation pipe is also sequentially communicated with a condenser and an energy-saving heater.
The condenser and the energy-saving heater further recover the heat of the flue gas, thereby further improving the efficiency of the boiler and simultaneously reducing the emission of harmful gases.
Further, a low-nitrogen burner is installed at the end part of the combustion chamber. The low-nitrogen burner reduces the emission of nitrogen oxides in the combustion process, thereby reducing the atmospheric pollution.
Furthermore, an inspection passage door is arranged at the end part of the combustion chamber close to the burn-back chamber. The inspection way door is mainly used for cleaning the burn-back chamber.
Further, the outer wall of the combustion chamber is in a corrugated pipe shape. The corrugated pipe-shaped combustion chamber can enlarge the contact area of the flue gas and the boiler water and enhance the heat exchange efficiency.
The utility model has the advantages that: the utility model makes the high temperature flue gas generated by combustion pass through the combustion chamber, the second return pipe bundle and the flue gas recirculation pipe in sequence, and the flue gas is recycled by three times of return cycles, thereby recycling the heat in the flue gas and having higher efficiency; the second return pipe bundle comprises a plurality of layers of return pipes with opposite spiral directions, so that the contact area of the flue gas and boiler water is further increased, and the flue gas heat exchange efficiency is improved; the impurity removing device is installed in the burning chamber to prevent impurities from entering the second return pipe to block the second return pipe.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples, wherein it is noted that, in the description of the invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular manner, and therefore should not be construed as limiting the present invention. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "communicating" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in figure 1, the three-pass steam boiler comprises a combustion chamber 1, wherein a low-nitrogen burner 11 is arranged at the end part of the combustion chamber 1, and the boiler can effectively reduce the generation of nitrogen oxides and atmospheric pollution in the combustion process by adopting the low-nitrogen burner 11. The outer wall of the combustion chamber 1 is in a corrugated pipe shape, so that the contact area between the outer wall of the combustion chamber 1 and boiler water is increased, and heat exchange is enhanced. The combustion chamber 1 is wrapped by a furnace pipe 2, the end part of the combustion chamber 1 is provided with a burn-back chamber 3, and the burn-back chamber 3 is used for fully burning incompletely burnt fuel. An inspection door 12 is installed at the end of the combustion chamber 1 near the burn-back chamber 3. The burn-back chamber 3 communicates with each other with the second return tube bank 4, and the impurity removal device 8 is installed near the second return tube bank 4 in the burn-back chamber 3, and the impurity removal device 8 can adopt the asbestos gauge, mainly filters the foreign particles in the flue gas, prevents to block up the second return tube 5.
And tube plates 7 are arranged at two ends of the second return tube bundle 4, and the tube plates 7 are used for fixing two ends of the second return tube bundle 4. The second return pipe bundle 4 comprises a plurality of layers of second return pipes 5, the second return pipes 5 are in a threaded tubular shape, the spiral directions of two adjacent layers of second return pipes 5 are opposite, and a gap exists between two adjacent layers of second return pipes 5. Boiler water is arranged outside the second return pipe 5, and the spiral second return pipe 5 increases the contact area of the flue gas and the boiler water, so that the heat exchange efficiency is enhanced.
The second return tube bundle 4 is also communicated with a front smoke box 13, the front smoke box 13 is communicated with a smoke recirculation tube 6, the recirculation tube 6 is also sequentially communicated with a condenser 9 and an energy-saving heater 10, the condenser 9 and the energy-saving heater 10 are used for further recovering heat in smoke, and meanwhile, the energy-saving heater 10 can reduce the emission of harmful gases.
The utility model discloses the theory of operation: flue gas that low nitrogen combustor 11 burning produced loops through combustion chamber 1, second return stroke tube bank 4 and flue gas recirculation pipe 6 in proper order, and flue gas recirculation pipe 6 still is connected with condenser 9 and energy-saving appliance 10, forms many return strokes flue gas pipeline and discharges after recycling the heat in the flue gas many times to whole heat exchange efficiency who improves the boiler. In order to further improve the heat exchange efficiency of the boiler, the second return pipes 5 are spiral, and the spiral directions of two adjacent layers of the second return pipes 5 are opposite. In order to prevent the second return pipe 5 from being clogged, a foreign substance removing device is further installed in the return chamber 3.
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.
Claims (8)
1. A three-pass steam boiler is characterized in that: the device comprises a combustion chamber (1), a furnace pipe (2) wraps the combustion chamber (1), a burn-back chamber (3) is arranged at the end part of the combustion chamber (1), the burn-back chamber (3) is communicated with a second return pipe bundle (4), the second return pipe bundle (4) is also communicated with a front smoke box (13), and the front smoke box (13) is communicated with a smoke recirculation pipe (6);
the second return pipe bundle (4) comprises a plurality of layers of second return pipes (5), and the second return pipes (5) are in a threaded tubular shape.
2. A triple-pass steam boiler according to claim 1, characterized in that: the spiral directions of the second return pipes (5) of two adjacent layers are opposite, and a gap exists between the second return pipes (5) of two adjacent layers.
3. A triple-pass steam boiler according to claim 1 or 2, characterized in that: and tube plates (7) are mounted at two ends of the second return tube bundle (4).
4. A triple-pass steam boiler according to claim 3, characterized in that: and an impurity removing device (8) is arranged in the burn-back chamber (3) and close to the second return pipe bundle (4).
5. A triple-pass steam boiler according to claim 4, characterized in that: the recirculation pipe (6) is also sequentially communicated with a condenser (9) and an energy-saving heater (10).
6. A triple-pass steam boiler according to claim 5, characterized in that: and a low-nitrogen burner (11) is arranged at the end part of the combustion chamber (1).
7. A triple-pass steam boiler according to claim 5, characterized in that: an inspection passage door (12) is arranged at the end part of the combustion chamber (1) close to the reburning chamber (3).
8. A triple-pass steam boiler according to claim 5, characterized in that: the outer wall of the combustion chamber (1) is in a corrugated pipe shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023088502.4U CN214064878U (en) | 2020-12-17 | 2020-12-17 | Three-return steam boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023088502.4U CN214064878U (en) | 2020-12-17 | 2020-12-17 | Three-return steam boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214064878U true CN214064878U (en) | 2021-08-27 |
Family
ID=77409850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023088502.4U Active CN214064878U (en) | 2020-12-17 | 2020-12-17 | Three-return steam boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214064878U (en) |
-
2020
- 2020-12-17 CN CN202023088502.4U patent/CN214064878U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20241010 Address after: 401221 plant 1-1, Qixin West Road, Yanjia street, Changshou District, Chongqing Patentee after: Chongqing Huayi Taiguo Energy Equipment Co.,Ltd. Country or region after: China Address before: 402160 Fenghuang Lake Engineering Co., Ltd., Chongqing Yongchuan Industrial Park, building 1, No. 999, Xingguang Avenue, Yongchuan District, Chongqing Patentee before: CHONGQING HUAYI TAIHU BOILER CO.,LTD. Country or region before: China |
|
| TR01 | Transfer of patent right |