CN203797629U - Low-pressure drain cooler regenerative system and generator set - Google Patents
Low-pressure drain cooler regenerative system and generator set Download PDFInfo
- Publication number
- CN203797629U CN203797629U CN201420106720.1U CN201420106720U CN203797629U CN 203797629 U CN203797629 U CN 203797629U CN 201420106720 U CN201420106720 U CN 201420106720U CN 203797629 U CN203797629 U CN 203797629U
- Authority
- CN
- China
- Prior art keywords
- low
- pressure
- pressure heater
- drain cooler
- hydrophobic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
- 230000001172 regenerating effect Effects 0.000 title claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 230000002209 hydrophobic effect Effects 0.000 claims description 60
- 239000012530 fluid Substances 0.000 claims description 10
- 238000009834 vaporization Methods 0.000 claims description 7
- 230000008016 vaporization Effects 0.000 claims description 7
- 238000009998 heat setting Methods 0.000 claims description 6
- 238000010248 power generation Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 4
- 238000000605 extraction Methods 0.000 abstract description 2
- 238000009833 condensation Methods 0.000 abstract 1
- 230000005494 condensation Effects 0.000 abstract 1
- 230000009466 transformation Effects 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model provides a low-pressure drain cooler regenerative system and a generator set. The low-pressure drain cooler regenerative system utilizes the heat of drain water of a low-pressure heater. A low-pressure drain cooler system heats low-pressure drain water of the low-pressure heater, and after the drain water is heated to be vaporized, the produced steam is guided back to the low-pressure heater. The low-pressure drain cooler regenerative system can solve the problem that water is not drained smoothly between low-pressure heaters, and the purposes of indirectly heating condensation water, reducing the steam extraction amount and improving set economical efficiency can be achieved.
Description
Technical field
The utility model relates to thermal power generation, is specifically related to the heat regenerative system in steam power plant.
Background technology
Now use in the heat regenerative system of steam turbine power generation factory, between adjacent two-stage low-pressure heater, especially last two-stage low-pressure heater 3-1 and 3-2 adopt the hydrophobic mode of flowing automatically step by step, in the hydrophobic cooling section of inferior final stage low-pressure heater 3-2, utilize hydrophobic heating main condensate, as shown in Figure 1, thereby recovery heat, reaches the object that improves unit heat economy.
But, the a lot of subcritical and supercritical unit of domestic current operation, it (is mainly because the pressure reduction between this two-stage low-pressure heater is too small that end two-stage low-pressure heater exists the problem of blocked drain more, cause this pressure reduction to be not enough to overcome the resistance of drain water piping and respective valves), many units are in normal operation or underrun stage, all need to open for a long time emergency drain valve, caused thermal loss, reduced unit economy.
Utility model content
The purpose of this utility model is by adopting the relatively low low pressure drain cooler heat regenerative system of pressure, improving in thermodynamic system efficiency, the cost of reduction equipment and piping, and do not increase the operate power of condensate pump, increase return on investment, expand the range of application of energy conservation.
For achieving the above object, the utility model provides a kind of low pressure drain cooler heat regenerative system, and described heat regenerative system comprises condenser, oxygen-eliminating device and multistage low-pressure heater, it is characterized in that, described heat regenerative system also comprises low pressure drain cooler, wherein
The hydrophobic entrance of high temperature of described low pressure drain cooler is connected with the hydrophobic outlet of the described one-level low-pressure heater in multistage low-pressure heater via pipeline, the hydrophobic low-pressure heater that enters described condenser or another stage pressure Temperature Matching after described low pressure drain cooler is cooling of the described one-level low-pressure heater in described multistage low-pressure heater;
A hydrophobic part for the next stage low-pressure heater of the described one-level low-pressure heater in described multistage low-pressure heater is communicated with the hydrophobic inlet fluid of low temperature of described low pressure drain cooler, described low pressure drain cooler be communicated with this next stage low-pressure heater fluid with after heating vaporization hydrophobic come heat-setting water, hydrophobic another part of the next stage low-pressure heater of the described one-level low-pressure heater in described multistage low-pressure heater and next stage low-pressure heater or condenser fluid be again communicated with to make this hydrophobic another part oneself flow to described in next stage low-pressure heater or condenser again.
Preferably, between the hydrophobic outlet of the described one-level low-pressure heater in the hydrophobic entrance of the high temperature of described low pressure drain cooler and described multistage low-pressure heater, be directly connected by pipeline.
Preferably, described one-level low-pressure heater in described multistage low-pressure heater is the inferior final stage low-pressure heater of described heat regenerative system, and the next stage low-pressure heater of the described one-level low-pressure heater in described multistage low-pressure heater is the final stage low-pressure heater of described heat regenerative system.
Preferably, a hydrophobic part for described final stage low-pressure heater is communicated to described condenser via pipeline and drain valve, and hydrophobic another part of described final stage low-pressure heater is communicated to the hydrophobic entrance of low temperature of described low pressure drain cooler via another pipeline and another drain valve.
Preferably, described low pressure drain cooler is arranged between the two-stage low-pressure heater that exists blocked drain.
Preferably, the operating pressure of described low-pressure heater is lower than 0.2MPa (a).
Preferably, the operating pressure of described low pressure drain cooler is lower than 0.2MPa (a).
Preferably, the position of described low pressure drain cooler is lower than the position of described low-pressure heater.
The utility model also provides a kind of generating set, and this generating set comprises above-mentioned low pressure drain cooler heat regenerative system.
Preferably, described generating set is subcritical generating set, supercritical generating unit or ultra supercritical power generation unit.
Draining system of the present utility model has utilized the hydrophobic heat of low-pressure heater, by low pressure drain cooler system, the low-pressure heater that heated pressure is lower hydrophobic, after hydrophobic heated vaporization, the steam producing draws and is back to low-pressure heater, reaches indirect condensate water, reduces the amount of drawing gas, improves unit economy object.
Brief description of the drawings
Fig. 1 is the system diagram of the existing hydrophobic heat regenerative system of flowing automatically step by step;
Fig. 2 is according to the system flow chart of the low pressure drain cooler heat regenerative system of the first embodiment of the present utility model; And
Fig. 3 is according to the system flow chart of the low pressure drain cooler heat regenerative system of the second embodiment of the present utility model.
Detailed description of the invention
Below with reference to accompanying drawing, preferred embodiment of the present utility model is elaborated, understands the purpose of this utility model, feature and advantage so that clearer.It should be understood that embodiment shown in the drawings is not the restriction to the utility model scope, and just for the connotation of technical solutions of the utility model is described.
Herein, " upper level low-pressure heater ", " next stage low-pressure heater " refer in heat regenerative system, along the flow direction of condensate water, than certain one-level low-pressure heater, one-level low-pressure heater in more close condenser position is called " next stage low-pressure heater ", is called " upper level low-pressure heater " at the one-level low-pressure heater further from condenser position.
Terminological interpretation
Drain cooler: before hydrophobic inflow next stage low-pressure heater or condenser, first pass through surface-type heat exchanger, enter next stage low-pressure heater or condenser after suitably cooling with main condensate by hydrophobic again, this surface-type heat exchanger is referred to as drain cooler.Herein, the operating pressure of drain cooler at 0.02MPa (a) between 0.2MPa (a), therefore claim again low pressure drain cooler.
Low-pressure heater: low-pressure heater herein refer to rated pressure at 0.015MPa (a) to the surface heater between 0.2MPa (a).Herein, low-pressure heater can be single-row, can be also biserial.In ultra supercritical unit, refer generally to rated pressure at 0.015MPa (a) to the surface heater between 0.2MPa (a).In supercritical unit, refer generally to rated pressure at 0.015MPa (a) to the surface heater between 0.15MPa (a).In other units, refer generally to rated pressure at 0.015MPa (a) to the surface heater between 0.1MPa (a).
Fig. 2 illustrates according to the system flow chart of the low pressure drain cooler heat regenerative system 101 of the first embodiment of the present utility model.Low pressure drain cooler heat regenerative system 101 of the present utility model is parts of steamer generating circulation system.As shown in Figure 2, low pressure drain cooler heat regenerative system 101 comprises drain cooler 6, multiple low-pressure heater 3-1,3-2 and 3-3, steam piping, hydrophobic piping, hydrophobic valve 5, oxygen-eliminating device 4 and condenser 1 and condensate pump 2.For the sake of clarity, 3 low-pressure heaters are only shown in figure, but those of ordinary skill in the art will understand, the quantity of low-pressure heater is not limited to 3, but the low-pressure heater of specific quantity can be set as required.
From in prior art by inferior final stage low-pressure heater 3-2 hydrophobic from flow to final stage low-pressure heater 3-1 different be, in the present embodiment, hydrophobic entrance 61 fluids of high temperature of the hydrophobic and drain cooler 6 of inferior final stage low-pressure heater 3-2 are communicated with, and after drain cooler 6, enter condenser 1.The hydrophobic outlet of final stage low-pressure heater 3-1 is divided into two-way, and a road is communicated to condenser 1 via pipeline and drain valve 5.Another road is communicated with hydrophobic entrance 62 fluids of low temperature of drain cooler 6 via another pipeline and another drain valve 5, after drain cooler 6 heating vaporizations, gets back to final stage low-pressure heater 3-1, for heat-setting water via steam (vapor) outlet 63 and corresponding pipeline.The ratio of the flow between the two-way of final stage low-pressure heater is hydrophobic can arrange according to the thermal balance of system.
, inferior final stage low-pressure heater 3-2 hydrophobic can enter drain cooler 6 and heat a part of final stage low-pressure heater 3-1 hydrophobic.The hydrophobic drain cooler 6 that enters of part of final stage low-pressure heater 3-1, after heated vaporization, the steam of generation draws back top heater 3-1, heat-setting water.
In above-mentioned low pressure drain cooler heat regenerative system, in drain cooler 6, heated medium is the hydrophobic of low-pressure heater 3-1, pressure is lower, for example, to current common ultra supercritical unit, the about 0.02MPa of specified operating pressure (a) that final stage low-pressure heater is hydrophobic.Lower pressure greatly reduces the cost of drain cooler 6 equipment and piping (comprising pipeline, pipe fitting, valve etc.), increases return on investment.
In addition, because low pressure drain cooler 6 adopts low position, differential static pressure between itself and time final stage low-pressure heater 3-2 is about 0.1MPa, pressure reduction is larger, and there is not the corresponding flow resistance such as drain valve in inferior final stage low-pressure heater 3-2 to the pipeline of low pressure drain cooler 6, because this final stage low-pressure heater 3-2 hydrophobic can flow to drain cooler 6 and can not exist the problem of blocked drain swimmingly.
Fig. 3 illustrates according to the system flow chart of the low pressure drain cooler heat regenerative system 102 of the second embodiment of the present utility model.System 102 shown in Fig. 3 is similar to the system 101 shown in Fig. 2, difference is in Fig. 3, the hydrophobic drain cooler that passes through of low-pressure heater of certain one-level intergrade, heat low-pressure heater hydrophobic of this intergrade next stage, for solving the blocked drain problem between certain two-stage intergrade low-pressure heater.
In the present embodiment, the hydrophobic outlet of certain one-level intergrade low-pressure heater 3n is communicated with the hydrophobic inlet fluid of drain cooler 6, after drain cooler 6, enters the low-pressure heater of condenser 1 or certain first class pressure Temperature Matching.The hydrophobic two-way that is divided into of this intergrade next stage low-pressure heater 3n-1, a road is communicated to next stage low-pressure heater 3n-2 again via pipeline and drain valve 5.Another road is communicated with drain cooler 6 fluids via another pipeline and another drain valve 5, after drain cooler 6 heating vaporizations, gets back to this intergrade next stage low-pressure heater 3n-1, for heat-setting water.
This embodiment is especially favourable for the Transformation of Unit of blocked drain between certain two-stage low-pressure heater, can, according to extraction pressure, after the low-pressure heater of blocked drain, set up drain cooler, thereby solves blocked drain.
It is pointed out that for the sake of clarity, 4 low-pressure heaters are only shown in figure, but those of ordinary skill in the art will understand, the quantity of low-pressure heater is not limited to 4, but the low-pressure heater of specific quantity can be set as required.In addition, although a drain cooler system is only shown in figure, as required, multiple drain cooler systems also can be set, for solving the blocked drain problem between multiple low-pressure heaters.
Low pressure drain cooler heat regenerative system tool of the present utility model has the following advantages:
1. in system configuration of the present utility model, what in drain cooler, heated medium was low-pressure heater is hydrophobic, and pressure is lower.For example, to current common ultra supercritical power generation unit, the about 0.02MPa of specified operating pressure (a) that final stage low-pressure heater is hydrophobic, lower pressure greatly reduces the cost of drain cooler equipment and piping (comprising pipeline, pipe fitting, valve etc.), increases return on investment.
2. equipment investment is little, and earning rate is high, and for example, to 1 1000MW ultra supercritical thermal power generation unit, the equipment of low pressure drain cooler system and piping investment can drop to approximately 1,000,000 yuan.
3. low pressure drain cooler system does not have corresponding flow resistance, flow smooth and easy, efficiency is high, does not increase the operate power of condensate pump.
4. drain cooler adopts the hydrophobic as cooling medium of low discharge, and contour size of the unit(s) is little, piping is less, and floor space is little, for the limited technological transformation project in place has been created strong condition.
5. applicability is good, is not only applicable to newly-built Fossil Fueled Power Plant Project, especially the energy-conservation technological transformation of the unit that puts into operation is had to better applicability, is also particularly useful for high parameter Fossil Fueled Power Plant Project.
6. can be by a hydrophobic part for its next stage low-pressure heater of hydrophobic heating of certain grade of low-pressure heater, after the hydrophobic heated vaporization of this next stage low-pressure heater, can heat-setting water, improve thus heat regenerative system efficiency.
Below described preferred embodiment of the present utility model in detail, but it will be appreciated that, after having read above-mentioned instruction content of the present utility model, those skilled in the art can make various changes or modifications the utility model.These equivalent form of values fall within the application's appended claims limited range equally.
Claims (10)
1. a low pressure drain cooler heat regenerative system, described heat regenerative system comprises condenser, oxygen-eliminating device and multistage low-pressure heater, it is characterized in that, described heat regenerative system also comprises low pressure drain cooler, wherein
The hydrophobic entrance of high temperature of described low pressure drain cooler is connected with the hydrophobic outlet of the one-level low-pressure heater in described multistage low-pressure heater via pipeline, the hydrophobic low-pressure heater that enters described condenser or another stage pressure Temperature Matching after described low pressure drain cooler is cooling of the described one-level low-pressure heater in described multistage low-pressure heater;
A hydrophobic part for the next stage low-pressure heater of the described one-level low-pressure heater in described multistage low-pressure heater is communicated with the hydrophobic inlet fluid of low temperature of described low pressure drain cooler, described low pressure drain cooler be communicated with this next stage low-pressure heater fluid with after heating vaporization hydrophobic come heat-setting water, hydrophobic another part of the next stage low-pressure heater of the described one-level low-pressure heater in described multistage low-pressure heater and next stage low-pressure heater or condenser fluid be again communicated with to make this hydrophobic another part oneself flow to described in next stage low-pressure heater or condenser again.
2. low pressure drain cooler heat regenerative system according to claim 1, it is characterized in that, between the hydrophobic outlet of the described one-level low-pressure heater in the hydrophobic entrance of high temperature and the described multistage low-pressure heater of described low pressure drain cooler, be directly connected by pipeline.
3. low pressure drain cooler heat regenerative system according to claim 1, it is characterized in that, described one-level low-pressure heater in described multistage low-pressure heater is the inferior final stage low-pressure heater of described heat regenerative system, and the next stage low-pressure heater of the described one-level low-pressure heater in described multistage low-pressure heater is the final stage low-pressure heater of described heat regenerative system.
4. low pressure drain cooler heat regenerative system according to claim 3, it is characterized in that, a hydrophobic part for described final stage low-pressure heater is communicated to described condenser via pipeline and drain valve, and hydrophobic another part of described final stage low-pressure heater is communicated to the hydrophobic entrance of low temperature of described low pressure drain cooler via another pipeline and another drain valve.
5. low pressure drain cooler heat regenerative system according to claim 1, is characterized in that, described low pressure drain cooler is arranged between the two-stage low-pressure heater that exists blocked drain.
6. low pressure drain cooler heat regenerative system according to claim 1, is characterized in that, the operating pressure of described low-pressure heater is lower than 0.2MPa (a).
7. low pressure drain cooler heat regenerative system according to claim 1, is characterized in that, the operating pressure of described low pressure drain cooler is lower than 0.2MPa (a).
8. low pressure drain cooler heat regenerative system according to claim 1, is characterized in that, the position of described low pressure drain cooler is lower than the position of described low-pressure heater.
9. a generating set, is characterized in that, described generating set comprises the low pressure drain cooler heat regenerative system described in claim 1-8 any one.
10. generating set according to claim 9, is characterized in that, described generating set is subcritical generating set, supercritical generating unit or ultra supercritical power generation unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420106720.1U CN203797629U (en) | 2014-03-10 | 2014-03-10 | Low-pressure drain cooler regenerative system and generator set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420106720.1U CN203797629U (en) | 2014-03-10 | 2014-03-10 | Low-pressure drain cooler regenerative system and generator set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203797629U true CN203797629U (en) | 2014-08-27 |
Family
ID=51379837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420106720.1U Withdrawn - After Issue CN203797629U (en) | 2014-03-10 | 2014-03-10 | Low-pressure drain cooler regenerative system and generator set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203797629U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103836608A (en) * | 2014-03-10 | 2014-06-04 | 中国电力工程顾问集团华东电力设计院 | Regenerative system of low-pressure drain water cooler |
| CN104990061A (en) * | 2015-07-31 | 2015-10-21 | 魏熙臣 | Externally-arranged steam cooler connection system in steam turbine heat regenerative system |
| CN111023077A (en) * | 2019-12-23 | 2020-04-17 | 东方电气集团东方汽轮机有限公司 | Drainage system with external cooler for low-pressure heater and control method |
| CN112818516A (en) * | 2021-01-06 | 2021-05-18 | 中国神华能源股份有限公司国华电力分公司 | Drainage optimization method for regenerative system of full-high-position steam turbine generator unit |
-
2014
- 2014-03-10 CN CN201420106720.1U patent/CN203797629U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103836608A (en) * | 2014-03-10 | 2014-06-04 | 中国电力工程顾问集团华东电力设计院 | Regenerative system of low-pressure drain water cooler |
| CN103836608B (en) * | 2014-03-10 | 2016-03-23 | 中国电力工程顾问集团华东电力设计院有限公司 | Low pressure drain cooler heat regenerative system |
| CN104990061A (en) * | 2015-07-31 | 2015-10-21 | 魏熙臣 | Externally-arranged steam cooler connection system in steam turbine heat regenerative system |
| CN104990061B (en) * | 2015-07-31 | 2017-01-25 | 魏熙臣 | Externally-arranged steam cooler connection system in steam turbine heat regenerative system |
| CN111023077A (en) * | 2019-12-23 | 2020-04-17 | 东方电气集团东方汽轮机有限公司 | Drainage system with external cooler for low-pressure heater and control method |
| CN112818516A (en) * | 2021-01-06 | 2021-05-18 | 中国神华能源股份有限公司国华电力分公司 | Drainage optimization method for regenerative system of full-high-position steam turbine generator unit |
| CN112818516B (en) * | 2021-01-06 | 2024-08-20 | 中国神华能源股份有限公司国华电力分公司 | Drainage optimization method for heat regeneration system of full-high-position steam turbine generator unit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103836608B (en) | Low pressure drain cooler heat regenerative system | |
| CN203797629U (en) | Low-pressure drain cooler regenerative system and generator set | |
| CN106247312A (en) | A kind of extra-supercritical unit double reheat two-shipper backheat thermodynamic system without deaerator | |
| CN203099962U (en) | Circulating-water direct heating system of thermal power plant | |
| CN206037003U (en) | Secondary reheating unit EC BEST steam turbine steam exhaust heating deoxidization boiler feed water's thermodynamic system | |
| CN104061027B (en) | The high temperature steam-extracting cooling system of Double reheat steam turbine thermodynamic system | |
| CN204113354U (en) | A kind of gland seal system and thermodynamic system of steam tur | |
| CN104728827B (en) | Join the condensate system of weep gland steam heater | |
| CN104456519A (en) | Novel efficient water supply heat recovery system for secondary reheating unit | |
| CN102809142B (en) | Heat recovery system for secondary reheating unit in power plant and power plant | |
| CN103115349B (en) | Externally arranged steam cooler system in heat regenerative system of power plant and heat regenerative system | |
| CN105370332A (en) | Stage-adjustable ten-stage regeneration system of 1000 MW unit | |
| CN202441442U (en) | Regenerated steam-driven draught fan thermodynamic cycle system of air cooling unit of power plant | |
| CN202546728U (en) | External tandem type steam cooler in heat regenerative system of large thermal power plant | |
| CN203273855U (en) | Externally-arranged steam cooler system in regenerative system of power plant and regenerative system | |
| CN118188083A (en) | Carbon capture power generation system | |
| CN102818252B (en) | Regenerative system of power station single reheating set and power station | |
| CN106382620A (en) | Low-pressure water supply system for steam extraction and backheating of power station unit | |
| CN202349998U (en) | Condensed water and water supply deoxidizing system for thermal power plant | |
| CN109114807A (en) | A kind of Air-source Heat Pump crude oil heating system | |
| CN202915337U (en) | Regenerative system and generator of power plant secondary reheating unit | |
| CN105605552A (en) | Heat energy recycling device for steam exhaust of deaerator in boiler steam turbine system | |
| CN203978523U (en) | The high temperature steam-extracting cooling system of Double reheat steam turbine thermodynamic system | |
| CN205939098U (en) | Single -row high pressure heater system of double reheat unit | |
| CN103836610A (en) | Heat supply network water drainage heating system capable of improving economical efficiency of heat supply unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140827 Effective date of abandoning: 20160323 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |