CN204901728U - Heat hydrophobous fiery power boiler waste heat recovery system of discharging fume - Google Patents
Heat hydrophobous fiery power boiler waste heat recovery system of discharging fume Download PDFInfo
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- CN204901728U CN204901728U CN201520425592.1U CN201520425592U CN204901728U CN 204901728 U CN204901728 U CN 204901728U CN 201520425592 U CN201520425592 U CN 201520425592U CN 204901728 U CN204901728 U CN 204901728U
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- pipeline
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- economizer
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- 239000002918 waste heat Substances 0.000 title claims abstract description 12
- 238000011084 recovery Methods 0.000 title claims abstract description 11
- 239000003517 fume Substances 0.000 title abstract description 3
- 238000007599 discharging Methods 0.000 title abstract 2
- 239000007789 gas Substances 0.000 claims abstract description 49
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000000779 smoke Substances 0.000 claims description 9
- 230000005484 gravity Effects 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000009998 heat setting Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The utility model provides fiery power boiler waste heat recovery system of discharging fume comprises bleeder heater, first pipeline, second pipeline, delivery pipe, low -level (stack -gas) economizer and wet return, connects first pipeline on preoral condensate pipe is gone into to the bleeder heater, the hydrophobic exit linkage second pipeline of bleeder heater, the delivery pipe is merged into with the second pipeline to first pipeline, supplies the entry of water piping connection low -level (stack -gas) economizer, and the water piping connection condensate pipe is passed through back in the export of low -level (stack -gas) economizer, combines low -level (stack -gas) economizer and drainage system ingeniously, has improved the heat economy nature of system, reduces the manufacturing cost of bleeder heater.
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 heating the hydrophobic and condensate water of fired power generating unit low pressure heat regenerative system.
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.
The hydrophobic connected mode of existing fired power generating unit has hydrophobicly flows automatically step by step and adopts drainage pump two kinds of modes, respectively as shown in Figures 1 and 2.At low pressure bleeder heater, access extracted steam from turbine 9, condensate water 10 and hydrophobic 11 respectively.Although adopt in Fig. 1 hydrophobic flow automatically step by step mode system and equipment simple, because hydrophobic temperature is higher, hydrophobicly inevitably make system heat-economy decline after gravity flow enters subordinate step by step; And adopt in Fig. 2 and utilize drainage pump hydrophobic access condensate water can be made full use of the heat drawn gas, its heat-economy is better, but adopts drainage pump to add system investments, and is not utilizing low-level (stack-gas) economizer to add the relevant enforcement technology of thermal drain at present.
Utility model content
In order to improve the heat-economy of power plant boiler smoke waste heat recovery system better, the utility model proposes the scheme adopting the hydrophobic and condensate water of low-level (stack-gas) economizer heating fired power generating unit low pressure heat regenerative system.
For achieving the above object, the utility model takes following design:
A kind of power plant boiler smoke waste heat recovery system, is made up of bleeder heater, the first pipeline, the second pipeline, feed pipe, low-level (stack-gas) economizer and return pipe, it is characterized in that: the condensate pipe before bleeder heater entrance connects the first pipeline; Hydrophobic outlet connection second pipeline of bleeder heater, the first pipeline and the second pipeline merge into feed pipe, and feed pipe connects the entrance of low-level (stack-gas) economizer, and the outlet of low-level (stack-gas) economizer connects condensate pipe by return pipe, and low-level (stack-gas) economizer is arranged in flue.
Further, the first pipeline is provided with condensate water control valve, the second pipeline is provided with hydrophobic transfer valve.
Further, condensate water control valve adopts manually or electric control valve, and hydrophobic transfer valve adopts manual or electronic two-bit triplet transfer valve.
Further, the second pipeline is provided with drainage pump.
Further, utilize condensate water governor valve control low-level (stack-gas) economizer output, utilize hydrophobic transfer valve to switch hydrophobic access low-level (stack-gas) economizer or hydrophobic gravity flow.
The utility model has the advantages that: in the prerequisite not increasing investment and equipment, low-level (stack-gas) economizer and draining system are combined dexterously, improve the heat-economy of system, reduce the manufacturing cost of bleeder heater.
Accompanying drawing explanation
Fig. 1 is the existing hydrophobic mode system diagram that flows automatically step by step.
Fig. 2 is existing drainage pump mode system diagram.
Fig. 3 is system architecture schematic diagram.
In figure: hydrophobic transfer valve 1, drainage pump 2, condensate water control valve 3, feed pipe 4, low-level (stack-gas) economizer 5, return pipe 6, bleeder heater 7, flue 8, extracted steam from turbine 9, condensate water 10, hydrophobic 11
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 3, boiler exhaust gas residual neat recovering system is made up of drainage pump 2, hydrophobic transfer valve 1, condensate water control valve 3, feed pipe 4, low-level (stack-gas) economizer 5 and return pipe 6; Condensate pipe before bleeder heater 7 entrance is connected with condensate water control valve 3, the drain pipe of bleeder heater 7 connects hydrophobic transfer valve 1 and drainage pump 2; The downstream pipe of condensate water control valve 3 and the downstream pipe of drainage pump 2 merge into feed pipe 4, and feed pipe 4 connects the entrance of low-level (stack-gas) economizer 5, and the outlet of low-level (stack-gas) economizer 5 connects condensate pipe by return pipe 6.Low-level (stack-gas) economizer is arranged in flue 8.In this boiler exhaust gas residual neat recovering system, the hydrophobic of bleeder heater mixes with the condensate water through condensate water control valve 3 through hydrophobic transfer valve 1 and drainage pump 2, feeds low-level (stack-gas) economizer, returns condensate system after heating.
Because the best output of low-level (stack-gas) economizer is about 40% of unit condensing water flow, be greater than the hydrophobic flow of bleeder heater; For meeting the water supply requirement of low-level (stack-gas) economizer, partial coagulation water being sent into water supply line by condensate water control valve 3 and mixes with hydrophobic; Because the hydrophobic pressure of low pressure bleeder heater 7 is lower, needing, drainage pump 2 is set supercharging is carried out to it.Hydrophobic transfer valve 1 adopts two-bit triplet transfer valve, can switch between hydrophobic access low-level (stack-gas) economizer system or hydrophobic gravity flow two kinds of modes, can be manual or automatically controlled.Condensate water control valve 3 adopts manually or electric controlled regulating valve, can regulate the condensing water flow flowed through, and when hydrophobic access low-level (stack-gas) economizer system or hydrophobic gravity flow two kinds of modes, by regulating condensate water control valve, controls the output flowing into low-level (stack-gas) economizer.
As stated in the Background Art, the hydrophobic connected mode of fired power generating unit has hydrophobic gravity flow and drainage pump two kinds of modes step by step, and adopts the heat-economy of drainage pump mode better.By low-level (stack-gas) economizer system being combined with draining system optimization, both utilizing fume afterheat by low-level (stack-gas) economizer system recoveries, the efficiency utilization of hydrophobic heat can be realized again, thus improve the heat-economy of system.
In addition by the hydrophobic scheme by being pumped into low-level (stack-gas) economizer, by redesigning water route under the prerequisite not increasing equipment investment and more exchange device, low-level (stack-gas) economizer and draining system are combined, wherein partial coagulation water enters low-level (stack-gas) economizer by condensate water control valve 3, also reduce the condensing water flow of bleeder heater at the corresponding levels, the thermic load of bleeder heater at the corresponding levels is reduced, thus reduces the draw gas amount of bleeder heater at the corresponding levels from steam turbine, make use of the waste heat of flue gas to a greater extent.
Further, after adopting the utility model, the bleeder heater 7 be connected with hydrophobic transfer valve 1 can no longer need to arrange hydrophobic cooling section, both can reduce the manufacturing cost of bleeder heater, can further improve again the heat-economy of system.
Research shows, adopts the hydrophobic connected mode of bleeder heater of drainage pump can reduce unit coa consumption rate about 0.2g/kWh than hydrophobic mode of flowing automatically step by step, for 600MW unit, more piece can be about standard coal about 500 tons every year.Therefore the system heat-economy shown in Fig. 2 is higher than existing low-level (stack-gas) economizer heat-setting water system.
Compared with existing right boiler exhaust gas residual neat recovering system, advantage of the present utility model is:
(1) heat-economy of system is significantly improved;
(2) manufacturing cost of bleeder heater can be reduced.
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 (5)
1. a power plant boiler smoke waste heat recovery system, is made up of bleeder heater, the first pipeline, the second pipeline, feed pipe, low-level (stack-gas) economizer and return pipe, it is characterized in that: the condensate pipe before bleeder heater entrance connects the first pipeline; Hydrophobic outlet connection second pipeline of bleeder heater, the first pipeline and the second pipeline merge into feed pipe, and feed pipe connects the entrance of low-level (stack-gas) economizer, and the outlet of low-level (stack-gas) economizer connects condensate pipe by return pipe, and low-level (stack-gas) economizer is arranged in flue.
2. power plant boiler smoke waste heat recovery system according to claim 1, is characterized in that: the first pipeline is provided with condensate water control valve, the second pipeline is provided with hydrophobic transfer valve.
3. power plant boiler smoke waste heat recovery system according to claim 2, is characterized in that: condensate water control valve adopts manually or electric control valve, and hydrophobic transfer valve adopts manual or electronic two-bit triplet transfer valve.
4. power plant boiler smoke waste heat recovery system according to claim 1, is characterized in that: the second pipeline is provided with drainage pump.
5. power plant boiler smoke waste heat recovery system according to claim 3, is characterized in that: utilize condensate water governor valve control low-level (stack-gas) economizer output, utilizes hydrophobic transfer valve to switch hydrophobic access low-level (stack-gas) economizer or hydrophobic gravity flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520425592.1U CN204901728U (en) | 2015-06-17 | 2015-06-17 | Heat hydrophobous fiery power boiler waste heat recovery system of discharging fume |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520425592.1U CN204901728U (en) | 2015-06-17 | 2015-06-17 | Heat hydrophobous fiery power boiler waste heat recovery system of discharging fume |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204901728U true CN204901728U (en) | 2015-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520425592.1U Expired - Fee Related CN204901728U (en) | 2015-06-17 | 2015-06-17 | Heat hydrophobous fiery power boiler waste heat recovery system of discharging fume |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104976608A (en) * | 2015-06-17 | 2015-10-14 | 大唐(北京)能源管理有限公司 | Exhaust smoke waste heat recycling system for drain water heating thermal power plant boiler |
-
2015
- 2015-06-17 CN CN201520425592.1U patent/CN204901728U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104976608A (en) * | 2015-06-17 | 2015-10-14 | 大唐(北京)能源管理有限公司 | Exhaust smoke waste heat recycling system for drain water heating thermal power plant boiler |
| CN104976608B (en) * | 2015-06-17 | 2018-02-16 | 大唐(北京)能源管理有限公司 | It is a kind of to heat hydrophobic power plant boiler smoke waste heat recovery system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151223 Termination date: 20210617 |
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| CF01 | Termination of patent right due to non-payment of annual fee |