CN203454097U - Cold source connection device for flue gas waste heat recovery - Google Patents
Cold source connection device for flue gas waste heat recovery Download PDFInfo
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- CN203454097U CN203454097U CN201320543922.8U CN201320543922U CN203454097U CN 203454097 U CN203454097 U CN 203454097U CN 201320543922 U CN201320543922 U CN 201320543922U CN 203454097 U CN203454097 U CN 203454097U
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- pressure heater
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- final stage
- pipeline
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Abstract
The utility model discloses a cold source connection device for flue gas waste heat recovery. The cold source connection device is composed of a water pump, a check valve, regulating valves, low-pressure heaters and a flue gas heat exchanger. The inlet of the last-stage low-pressure heater is connected with an external condenser through a pipeline and a cold source inlet of a hot gas heat exchanger through a pipeline with the first regulating valve, and the outlet of the last-stage low-pressure heater is connected with a cold source inlet of the penultimate-stage low-pressure heater in series through a pipeline. The inlet of the penultimate-stage low-pressure heater is connected with the cold source inlet of the hot gas heat exchanger through the pipeline with the second regulating valve, and the outlet of the penultimate-stage low-pressure heater is connected with a water outlet pipe with the check valve and the inlet of the flue gas heat exchanger through a pipeline with the water pump and the third regulating valve. The cold source connection device for flue gas waste heat recovery is simple in body structure and can meet the energy conservation requirement of different boiler loads. A waste heat utilization device can track boiler operation load regulation, the energy-saving efficiency is the highest compared with other devices, and operation is safe and reliable.
Description
Technical field
The utility model relates to heat recovery application field, a kind of for reclaiming the low-temperature receiver access device of the flue gas waste heat recovery of power station unit boiler waste heat specifically.
Background technology
In recent years, how the concern to environmental protection cause along with enterprise and society, utilize the energy to become a kind of development trend more efficiently.
Boiler afterheat is as a kind of common and containing heat energy that can be large, in order to utilize the waste heat of boiler, generally can use heat reclamation device, its principle is to utilize fume afterheat to carry out heat-setting water, save drawing gas of low-pressure heater, it is got back in steam turbine and continue to do work, thereby the overall output work of increase power station unit is forthright and sincere, improves unit efficiency.
But in the process of existing recuperation of heat, how fume afterheat device is connected with bleeder heater, can directly have influence on its heat recovery efficiency.
Present fume afterheat device has parallel connection with the common connected mode of bleeder heater, connect and across three kinds in parallel of level.
In actual application process, as only only used three kinds of above-mentioned connected modes a kind of, all exist certain not enough.Specifically, when using series system, the whole condensate water of low-pressure heater are passed through waste heat apparatus, in-pipe flow resistance increment, need to increase corresponding reserve pump and energy consumption thereof or increase condensate pump energy consumption, because of the secondary fault that flue gas heat-exchange unit fault causes, there is certain potential safety hazard in series operation mode.Therefore, in general Transforming Engineering, do not take series operation mode; When residual heat using device is in parallel with final stage low-pressure heater, because the energy level that draws gas of final stage low-pressure heater is lower, its waste heat recovery usefulness is limited, cannot well meet the actual needs that use.When residual heat using device is in parallel with time final stage low-pressure heater, because this low autoclave two ends condensate water temperature difference is less, cause the volume of heat reclamation device integral body larger, be unfavorable for installing, increased cost simultaneously; When being connected across level parallel way with final stage, inferior final stage low-pressure heater, in underrun, may produce cold end corrosion.
Utility model content
The purpose of this utility model is to overcome the existing deficiency of prior art, and a kind of low-temperature receiver access device in parallel, across level parallel connection with the whole body that collects is provided.
For achieving the above object, the technical scheme that the utility model adopts is as follows:
The utility model is comprised of water pump, non-return valve, control valve, low-pressure heater and flue gas heat-exchange unit.
Described low-pressure heater at least includes final stage low-pressure heater, inferior final stage low-pressure heater two low-pressure heaters;
The entrance of described final stage low-pressure heater joins by pipeline and outside condenser;
The entrance of described final stage low-pressure heater is also by being connected with the pipeline of control valve and the condensate water entrance of hot gas heat exchanger;
The outlet of described final stage low-pressure heater is connected in series with the entrance of time final stage low-pressure heater by pipeline;
The outlet of described final stage low-pressure heater is also joined by pipeline and outside steam turbine;
The entrance of described final stage low-pressure heater is by being connected with the pipeline of control valve and the condensate water entrance of flue gas heat-exchange unit;
The outlet of described final stage low-pressure heater and an outlet conduit with non-return valve join;
The outlet of described final stage low-pressure heater is also connected with the condensate water entrance of described flue gas heat-exchange unit by a pipeline with water pump and control valve;
The outlet of described flue gas heat-exchange unit by pipeline connect with described outlet conduit on.
This practical operation principle is: when boiler high load capacity (as at full capacity) moves, control and introduce final stage low-pressure heater entrance condensate water, get back to time final stage low-pressure heater outlet, improve the flue gas heat-exchange unit low-temperature receiver temperature difference, thereby improve heat exchange efficiency; When boiler moderate duty (as 70% load) moves, control and introduce time final stage low-pressure heater entrance condensate water, get back to time final stage low-pressure heater outlet, can save time final stage low-pressure heater and draw gas, compare saving final stage low-pressure heater and draw gas, its efficiency is higher; When boiler at low load (as 50% load) moves, introduce time final stage low-pressure heater outlet condensate water, get back to time final stage low-pressure heater outlet, improve flue gas heat-exchange unit inlet water temperature, avoid cold end corrosion.During described boiler at low load operation, from inferior final stage low-pressure heater outlet water intaking, and get back to time final stage low-pressure heater outlet.Between inferior final stage low-pressure heater outlet water intaking and water return outlet, increase non-return valve, prevent that the condensate water after heat exchanger heating from flowing backwards; From inferior final stage low-pressure heater outlet water intaking road, increase reserve pump, overcome the resistance that heat exchanger increases.
The flue gas waste heat recovery apparatus body construction that the utility model is is simple, and can adapt to the energy-conservation demand under different boiler loads.Residual heat using device can be followed the tracks of boiler operatiopn Load Regulation, and energy-saving efficiency is the highest on year-on-year basis, moves more safe and reliable.
Accompanying drawing explanation
Fig. 1 is hardware connection diagram of the present utility model.
In figure, each label respectively: (1) condenser, (2) steam turbine, (3) control valve, (4) final stage low-pressure heater, (5) inferior final stage low-pressure heater, (6) flue gas heat-exchange unit, (7) control valve, (8) control valve, (9) non-return valve, (10) reserve pump.
The specific embodiment
For convenience of the utility model is done, further understand, existing in conjunction with Fig. 1 for an embodiment, the utility model is further described.
Embodiment:
The utility model is by water pump 10, non-return valve 9, and control valve 3,7,8, low-pressure heater, and flue gas heat-exchange unit 6 forms.
Described low-pressure heater at least includes final stage low- pressure heater 4,5 liang of low-pressure heaters of inferior final stage low-pressure heater;
The entrance of described final stage low-pressure heater 4 joins by pipeline and outside condenser 1;
The entrance of described final stage low-pressure heater 4 is also by being connected with the pipeline of control valve 3 and the condensate water entrance of hot gas heat exchanger 6;
The outlet of described final stage low-pressure heater 4 is connected in series with the entrance of time final stage low-pressure heater 5 by pipeline;
The outlet of described final stage low-pressure heater 4 is also joined by the steam turbine 2 of pipeline and portion of institute;
The entrance of described final stage low-pressure heater 5 is by being connected with the pipeline of control valve 7 and the condensate water entrance of hot gas heat exchanger 6;
The outlet of described final stage low-pressure heater 5 and an outlet conduit with non-return valve 9 join;
The outlet of described final stage low-pressure heater 5 is also connected with the pipeline of water pump 10 and control valve 8 and the condensate water entrance of described flue gas heat-exchange unit 6 by one;
The outlet of described flue gas heat-exchange unit 6 by pipeline connect with described outlet conduit on.
Claims (1)
1. for the low-temperature receiver access device of flue gas waste heat recovery, it is characterized in that: by water pump, non-return valve, control valve, low-pressure heater and flue gas heat-exchange unit, formed;
Described low-pressure heater at least includes final stage low-pressure heater, inferior final stage low-pressure heater two low-pressure heaters;
The entrance of described final stage low-pressure heater joins by pipeline and outside condenser;
The entrance of described final stage low-pressure heater is also by being connected with the pipeline of control valve and the low-temperature receiver entrance of hot gas heat exchanger;
The outlet of described final stage low-pressure heater is connected in series with the entrance of time final stage low-pressure heater by pipeline;
The outlet of described final stage low-pressure heater is also joined by the steam turbine of pipeline and portion of institute;
The entrance of described final stage low-pressure heater is by being connected with the pipeline of control valve and the low-temperature receiver entrance of hot gas heat exchanger;
The outlet of described final stage low-pressure heater and an outlet conduit with non-return valve join;
The outlet of described final stage low-pressure heater is also connected with the low-temperature receiver entrance of described flue gas heat-exchange unit by a pipeline with water pump and control valve;
The outlet of described flue gas heat-exchange unit by pipeline connect with described outlet conduit on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320543922.8U CN203454097U (en) | 2013-09-03 | 2013-09-03 | Cold source connection device for flue gas waste heat recovery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320543922.8U CN203454097U (en) | 2013-09-03 | 2013-09-03 | Cold source connection device for flue gas waste heat recovery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203454097U true CN203454097U (en) | 2014-02-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320543922.8U Expired - Fee Related CN203454097U (en) | 2013-09-03 | 2013-09-03 | Cold source connection device for flue gas waste heat recovery |
Country Status (1)
| Country | Link |
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| CN (1) | CN203454097U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106224934A (en) * | 2016-08-31 | 2016-12-14 | 浙江浙能节能科技有限公司 | A kind of Steam Turbine Regenerative System utilizing high-temperature flue gas heat-setting water |
| CN108534125A (en) * | 2018-04-11 | 2018-09-14 | 国电南京电力试验研究有限公司 | A kind of width load high pressure steam-supplying system |
| CN114183744A (en) * | 2021-10-15 | 2022-03-15 | 华北电力科学研究院有限责任公司 | Wind heating safety control system |
-
2013
- 2013-09-03 CN CN201320543922.8U patent/CN203454097U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106224934A (en) * | 2016-08-31 | 2016-12-14 | 浙江浙能节能科技有限公司 | A kind of Steam Turbine Regenerative System utilizing high-temperature flue gas heat-setting water |
| CN108534125A (en) * | 2018-04-11 | 2018-09-14 | 国电南京电力试验研究有限公司 | A kind of width load high pressure steam-supplying system |
| CN114183744A (en) * | 2021-10-15 | 2022-03-15 | 华北电力科学研究院有限责任公司 | Wind heating safety control system |
| CN114183744B (en) * | 2021-10-15 | 2024-03-01 | 华北电力科学研究院有限责任公司 | Wind heating safety control system |
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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: 20140226 Termination date: 20160903 |