CN204901726U - Boiler of addding heat transfer component waste heat recovery system of discharging fume - Google Patents
Boiler of addding heat transfer component waste heat recovery system of discharging fume Download PDFInfo
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- CN204901726U CN204901726U CN201520425485.9U CN201520425485U CN204901726U CN 204901726 U CN204901726 U CN 204901726U CN 201520425485 U CN201520425485 U CN 201520425485U CN 204901726 U CN204901726 U CN 204901726U
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Abstract
The utility model provides boiler waste heat recovery system of discharging fume, including the low -level (stack -gas) economizer, entry heat exchange assemblies, export heat exchange assemblies, entry heat exchange assemblies installs between low -level (stack -gas) economizer and entry flue, the export heat exchange assemblies install between low -level (stack -gas) economizer and exhaust pass, entry heat exchange assemblies and export heat exchange assemblies are the variable cross section shape, arrange a plurality of diaphragm type heat transfer components on its inside wall, effective inside working space that utilizes, reduce the flue gas side resistance of low -level (stack -gas) economizer, increase heat transfer area, system's investment and operation cost is reduced.
Description
Technical field
The utility model relates to a kind of boiler exhaust gas residual neat recovering system, particularly a kind of boiler exhaust gas residual neat recovering system installing membrane type heat exchange element additional.
Background technology
Heat loss due to exhaust gas is the main heat loss of power plant boiler.Modern Large-scale fire-electricity unit boiler design smoke evacuation temperature is about about 120 DEG C, and corresponding heat loss due to exhaust gas accounts for about 5% of boiler oil thermal discharge.Exhaust gas temperature raises, and its heat loss due to exhaust gas also increases, and not only wastes energy, and desulphurization system water consumption also can be made to increase.For improving the performance driving economy of power plant, the low-level (stack-gas) economizer technology of boiler exhaust gas waste-heat condensate water is utilized to be widely used at China's Thermal Power Enterprises in recent years.Because the fume side coefficient of heat transfer is little, low-level (stack-gas) economizer volume in boiler exhaust gas residual neat recovering system is usually huge, for ensureing heat exchange amount, reducing smoke flow resistance loss, the low-level (stack-gas) economizer width for boiler exhaust gas residual neat recovering system is generally greater than flue width; On the one hand, due to site space restriction, the variable cross-section coupling part length of low-level (stack-gas) economizer and flue is less, because the abrupt change of cross-section makes flow resistance increase; On the other hand, be not provided with heat exchange element in variable cross-section part, the waste of low-level (stack-gas) economizer internal working volume can be caused.
How effectively utilizing working space, reducing the fume side resistance of low-level (stack-gas) economizer is the matter of utmost importance that the needs reducing system investments and operating cost solve.
Utility model content
In order to solve the problems of the technologies described above, the utility model proposes, in the variable cross-section junction, both sides of low-level (stack-gas) economizer and flue, membrane type heat exchange element is installed, can working space be made full use of and reduce the resistance of variable cross-section flue, thus reducing investment and the operating cost of system.
For achieving the above object, the utility model takes following design:
A kind of boiler exhaust gas residual neat recovering system, comprise low-level (stack-gas) economizer, entrance heat-exchanging component, outlet heat-exchanging component, it is characterized in that: low-level (stack-gas) economizer width is greater than gas approach and exhaust pass width, entrance heat-exchanging component is installed between low-level (stack-gas) economizer and gas approach, outlet heat-exchanging component is installed between low-level (stack-gas) economizer and exhaust pass, entrance heat-exchanging component and outlet heat-exchanging component are variable cross-section shape, its madial wall is arranged some membrane type heat exchange elements, outlet heat-exchanging component is provided with condensate water import, entrance heat-exchanging component is provided with condensate water outlet.
Further, the steel plate that membrane type heat exchange element is fixedly connected with on heat exchanger tube by heat exchanger tube is formed.
Further, at entrance heat-exchanging component and outlet heat-exchanging component place, its madial wall installs membrane type heat exchange element radially; The steel plate of membrane type heat exchange element is perpendicular to heat-exchanging component madial wall, and the long limit of steel plate is fixedly connected with madial wall.
Further, membrane type heat exchange element is made up of the vertical steel plate of 36-90 sheet; Angle between each steel plate is taken as 4 °-10 °.
The utility model has the advantages that: effectively utilize space, reduce the fume side resistance of low-level (stack-gas) economizer, increase heat exchange area, reduce system investments and operating cost.
Accompanying drawing explanation
The system architecture schematic diagram that Fig. 1 is.
Fig. 2 is membrane type heat exchange element structure chart.
Fig. 3 is membrane type heat exchange element layout drawing.
1. outlet heat-exchanging component, 2. low-level (stack-gas) economizer, 3. entrance heat-exchanging components in figure, 4. condensate water import, 5. condensate water outlet, 6. gas approach, 7. exhaust pass, 8. heat exchanger tube, 9. steel plate
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in detail, should be appreciated that content described herein is only for instruction and explanation of the utility model, and be not used in restriction the utility model.
As shown in Figure 1, low-level (stack-gas) economizer 2 width is generally greater than flue width, entrance heat-exchanging component 3 can be respectively arranged with and export heat-exchanging component 1 between low-level (stack-gas) economizer 2 and gas approach 6, exhaust pass 7, entrance heat-exchanging component 3 and outlet heat-exchanging component 1 are variable cross-section shape, its madial wall are arranged some membrane type heat exchange elements.Outlet heat-exchanging component 1 is provided with condensate water import 4, entrance heat-exchanging component 3 is provided with condensate water outlet 5.
At entrance heat-exchanging component 3 and outlet heat-exchanging component 1 place, connect flue and low-level (stack-gas) economizer, low-level (stack-gas) economizer width is generally greater than flue width, and flue gas flow field disturbance herein can be caused strong, and its coefficient of heat transfer is larger.Arrange heat exchanger tube herein, desirable good heat transfer effect.
Condensate water enters from condensate water import 4, after flowing through outlet heat-exchanging component 1, low-level (stack-gas) economizer 2 and entrance heat-exchanging component 3 successively, flows out from condensate water outlet 5.
As shown in Figure 2, the steel plate 9 that membrane type heat exchange element is fixedly connected with on heat exchanger tube by heat exchanger tube 8 is formed, steel plate is rectangle, the a series of membrane type heat exchange element composition deflectors installed in the heat-exchanging component of both sides, the flue gas flow field that can realize making to enter and flow out low-level (stack-gas) economizer is even, the loss of reduction flow of flue gas, can be used as heat exchange unit again simultaneously, thus increase heat exchange area, reduce investment and operating cost.
As shown in Figure 3, at entrance heat-exchanging component 3 and outlet heat-exchanging component 1 place, its madial wall installs membrane type heat exchange element radially, is made up of the vertical steel plate 9 of 36-90 sheet; Steel plate is perpendicular to heat-exchanging component madial wall, and the long limit of steel plate is fixedly connected with madial wall, thus forms guide functions by steel plain to inner flue gas flow field.For avoiding occurring boundary layer separation, effectively reduce resistance, the angle between each steel plate should be too not large, and the requirement can arranged according to space is taken as 4 °-10 °.In order to make, flow field is more even, raising heat transfer effect, and the steel plate quantity adopted in the utility model can be greater than water conservancy diversion actual requirement, and its arrangement is determined by method for numerical simulation.
Compared with existing boiler exhaust gas residual neat recovering system, advantage of the present utility model is:
(1) fully space can be utilized by flue;
(2) cost of flue gas waste heat recovery system is reduced;
(3) system is simple, easily implements.
Last it is noted that the foregoing is only explanation of the present utility model, be not limited to the utility model, although be described in detail the utility model, for a person skilled in the art, it still can be modified to aforementioned described technical scheme, or carries out equivalent replacement to wherein portion of techniques feature.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (4)
1. a boiler exhaust gas residual neat recovering system, comprise low-level (stack-gas) economizer, entrance heat-exchanging component, outlet heat-exchanging component, it is characterized in that: low-level (stack-gas) economizer width is greater than gas approach and exhaust pass width, entrance heat-exchanging component is installed between low-level (stack-gas) economizer and gas approach, outlet heat-exchanging component is installed between low-level (stack-gas) economizer and exhaust pass, entrance heat-exchanging component and outlet heat-exchanging component are variable cross-section shape, its madial wall is arranged some membrane type heat exchange elements, outlet heat-exchanging component is provided with condensate water import, entrance heat-exchanging component is provided with condensate water outlet.
2. boiler exhaust gas residual neat recovering system according to claim 1, is characterized in that: the steel plate that membrane type heat exchange element is fixedly connected with on heat exchanger tube by heat exchanger tube is formed.
3. boiler exhaust gas residual neat recovering system according to claim 1, is characterized in that: at entrance heat-exchanging component and outlet heat-exchanging component place, its madial wall installs membrane type heat exchange element radially; The steel plate of membrane type heat exchange element is perpendicular to heat-exchanging component madial wall, and the long limit of steel plate is fixedly connected with madial wall.
4. boiler exhaust gas residual neat recovering system according to claim 3, is characterized in that: membrane type heat exchange element is made up of the vertical steel plate of 36-90 sheet; Angle between each steel plate is taken as 4 °-10 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520425485.9U CN204901726U (en) | 2015-06-17 | 2015-06-17 | Boiler of addding heat transfer component waste heat recovery system of discharging fume |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520425485.9U CN204901726U (en) | 2015-06-17 | 2015-06-17 | Boiler of addding heat transfer component waste heat recovery system of discharging fume |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204901726U true CN204901726U (en) | 2015-12-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520425485.9U Expired - Fee Related CN204901726U (en) | 2015-06-17 | 2015-06-17 | Boiler of addding heat transfer component waste heat recovery system of discharging fume |
Country Status (1)
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| CN (1) | CN204901726U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104976607A (en) * | 2015-06-17 | 2015-10-14 | 大唐(北京)能源管理有限公司 | Boiler smoke-exhaustion waste heat recycling system additionally provided with heat exchange elements |
-
2015
- 2015-06-17 CN CN201520425485.9U patent/CN204901726U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104976607A (en) * | 2015-06-17 | 2015-10-14 | 大唐(北京)能源管理有限公司 | Boiler smoke-exhaustion waste heat recycling system additionally provided with heat exchange elements |
| CN104976607B (en) * | 2015-06-17 | 2018-06-08 | 大唐(北京)能源管理有限公司 | A kind of boiler exhaust gas residual neat recovering system for adding heat exchange element |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20151223 Termination date: 20210617 |