CN107120713A - A kind of anti-overtemperature cooling system of high back pressure thermal power plant unit condensate - Google Patents
A kind of anti-overtemperature cooling system of high back pressure thermal power plant unit condensate Download PDFInfo
- Publication number
- CN107120713A CN107120713A CN201710459214.9A CN201710459214A CN107120713A CN 107120713 A CN107120713 A CN 107120713A CN 201710459214 A CN201710459214 A CN 201710459214A CN 107120713 A CN107120713 A CN 107120713A
- Authority
- CN
- China
- Prior art keywords
- heat exchanger
- condensate
- back pressure
- frequency conversion
- water
- 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.)
- Granted
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 63
- 230000005494 condensation Effects 0.000 claims abstract description 20
- 238000009833 condensation Methods 0.000 claims abstract description 20
- 239000000498 cooling water Substances 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims description 25
- 238000005086 pumping Methods 0.000 claims description 12
- 238000005498 polishing Methods 0.000 claims description 4
- 230000003134 recirculating effect Effects 0.000 claims description 2
- 230000001112 coagulating effect Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 2
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012913 prioritisation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
- F24D3/1058—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system disposition of pipes and pipe connections
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B11/00—Controlling arrangements with features specially adapted for condensers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The present invention provides a kind of anti-overtemperature cooling system of high back pressure thermal power plant unit condensate, including condenser and precision processing device of condensation water, set between condenser and precision processing device of condensation water and condense water heat exchanger, the one end for condensing water heat exchanger is passed through condensate, and the other end is passed through heat supply network backwater as cooling water.Simple in construction, small investment of the invention, realizes effective control of high back pressure thermal power plant unit condensing water temperature, system thermal is made full use of, i.e., heated part heat supply network backwater using condensate as cooling water using hot net water simultaneously, heat is reduced to scatter and disappear, it is further energy-saving.
Description
Technical field
The invention belongs to heat supply process field, more particularly to a kind of anti-overtemperature cooling system of high back pressure thermal power plant unit condensate
System.
Background technology
High back pressure thermal power plant unit can improve capacity usage ratio than traditional thermal power plant unit, reduce unit generation coal consumption,
With wide application prospect.
Thermal power plant unit is when Heating Period is run with high back pressure operating mode, and condensate is about 72.68 DEG C in the temperature that hot well is exported
Left and right（During 35kPa）, higher than the normal operating temperature of condensate polishing treatment（The normal operating temperature of condensate polishing treatment is 50
DEG C, maximum operating temperature is 68 DEG C）, former precision processing device of condensation water uses high-temperature resin, when condensing water temperature is high so that condense
Polishing unit performance is difficult to ensure that, it is impossible to normal safe operation, to ensure the feed water quality requirement of unit, need to reduce condensation
The temperature of water is to less than 65 DEG C.
The content of the invention
It is an object of the invention to propose a kind of anti-overtemperature cooling system of high back pressure thermal power plant unit condensate, high back pressure is solved
Enter the problem of precision processing device condensing water temperature is high in operation, improve the security and economy of unit.
The present invention uses following technical scheme：
A kind of anti-overtemperature cooling system of high back pressure thermal power plant unit condensate, including condenser 1 and precision processing device of condensation water 3,
Set between condenser 1 and precision processing device of condensation water 3 and condense water heat exchanger 2, described one end for condensing water heat exchanger 2 leads to
Enter condensate, the other end is passed through heat supply network backwater 7 as cooling water.
The heat supply network backwater 7 sets lateral 20 to introduce heat supply network backwater on condensation water heat exchanger 2, lateral 20
Pipeline boosting pumping system is set, for distributing the heat supply network backwater amount for entering condenser 1B sides and condensing water heat exchanger 2.
The frequency conversion pipeline booster system includes frequency conversion pipeline booster I 9 in parallel, frequency conversion pipeline booster II 10,
The pipeline boosting pumping system also includes the recirculating mass in parallel with frequency conversion pipeline booster I 9, frequency conversion pipeline booster II 10
Regulating valve 11, frequency conversion pipeline booster outlet main pipe is provided with ultrasonic flowmeter 15.
Condensate heat exchanger inlets valve is set on the condensate inlet channel condensed outside water heat exchanger 2
12nd, condensation water heat exchanger 2 is additionally arranged on outlet valve 13, the condensate inlet channel when not working, is entered for condensate
Enter setting bypass valve 14 on the bypass duct of precision processing device of condensation water 3, bypass duct.
The unit in high back pressure operating mode is public when the pipeline boosting pumping system can be two differences, now frequency-converter tube
Road boost pumping system and condense water heat exchanger 2 between pipeline on set switch valve I 16, frequency conversion pipeline booster system with
Condense as the occasion requires and switch valve II 17 is set on the pipeline between water heat exchanger 18.
Beneficial effects of the present invention：Simple in construction, small investment of the invention, realizes high back pressure thermal power plant unit condensing water temperature
Effective control, while using hot net water as cooling water, make full use of system thermal, i.e., heated part heat using condensate
Net backwater, reduces heat and scatters and disappears, further energy-saving.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
Wherein, 1- condensers, 2- condenses water heat exchanger, 3- precision processing device of condensation water, 4- condensate pumps, 5- recirculated waters
Water inlet, 6- recirculated water water outlets, 7- heat supply network backwater, 8- heat supply network backwater water outlets, 9- frequency conversion pipelines booster I, the boosting of 10 frequency conversion pipelines
Pump II, 11- recirculation flow adjustable valves, 12- condensate heat exchanger inlets valves, 13- condensate heat exchanger outlet valves,
14- condensate heat exchanger bypass valves, 15- ultrasonic flowmeters, 16- switch valves I, 17- switch valves II, 18- is as the occasion requires
Condense water heat exchanger, 19- heat supply network backwater main pipelines；20- laterals；The back-flowing and branched pipeline valve of 21- heat supply networks.
Embodiment
Below in conjunction with the accompanying drawings 1 and embodiment the present invention is described in further detail.
Anti- overtemperature cooling system as shown in Figure 1, at least including condenser 1, condenses water heat exchanger 2, condensate through place
Manage device 3 and pipeline boosting pumping system.With reference to each equipment in figure, work of the present invention under different operating modes is as follows.
The non-heat supply phase：Now, the A sides and B sides of condenser 1 are passed through recirculated water, and recirculated water water inlet 5 is from circulating water inlet
Road enters the A sides of condenser 1, then is flowed out from recirculated water water outlet 6.Under the operating mode, hot net water is no longer passed through, and condenses hydrothermal exchange
Device 2 is out of service, now, and the bypass duct bypass valve 14 for condensing water heat exchanger 2 is opened, and condensate directly passes through condensate
The bypass duct of heat exchanger 2 is directly entered precision processing device of condensation water 3.
The heat supply phase：Now unit is in high back pressure operating mode, and the A sides of condenser 1 are passed through recirculated water, and B sides are passed through hot net water, i.e.,
Operating mode as shown in Figure 1.The operating mode is divided into running on the lower load and high load capacity operating mode.
Running on the lower load：The hot well of condenser 1 outlet condensing water temperature is less than 65 DEG C（Back pressure is in below 25kPa）When, condense
Water heat exchanger 2 is out of service, and condensate heat exchanger bypass valve 14 is opened, and condensate is directly by condensing water heat exchanger
2 bypass duct is directly entered precision processing device of condensation water 3.
High load capacity operating mode：The hot well of condenser 1 outlet condensing water temperature is higher than 65 DEG C（Back pressure is higher than 25kPa）When, condensate
Heat exchanger 2 is put into operation, and condensate heat exchanger inlets valve 12 and condensate heat exchanger outlet valve 13 are opened, and is condensed
Water heat exchanger bypass valve 14 is closed.The B sides that the part of heat supply network backwater 7 enters condenser 1 by heat supply network backwater main pipeline are entered
After the heating of row one-level, from heat supply network backwater water outlet outflow, it is solidifying that another part enters the condensation cooling of water heat exchanger 2 through lateral 20
Bear water, the back-flowing and branched pipeline valve 21 of heat supply network, in some embodiments, the caliber of field pipes 19 are set on lateral 20
About 3.4 times of the caliber of pipeline 20, the resistance of pipeline 20 is larger, causes hot net water largely to enter condenser 1, condenses hydro-thermal and hands over
The cooling water inflow of parallel operation 2 is not enough, now, and system sets pipeline boosting pumping system before water heat exchanger 2 is condensed and boosted with pipeline
The ultrasonic flowmeter 15 of pumping system series connection, pipeline boosts pumping system containing frequency conversion pipeline booster I 9 and frequency conversion pipeline liter in parallel
Press pump II 10, maximum can provide 1600t/h cooling waters for heat exchanger, meanwhile, set and frequency conversion pipeline booster I 9 and frequency conversion
The recirculation flow adjustable valve 11 in parallel of pipeline booster II 10, when only one pump operation, and ultrasonic flowmeter 15 is measured
Flow be less than single pump maximum stream flow（800t/h）30% when, open recirculation flow adjustable valve 11, pipeline liter is flowed through in regulation
The flow of press pump is not less than the 30% of its maximum stream flow, prevents the cavitation phenomenons of pump from occurring.Simultaneously can be by adjusting frequency conversion pipeline
The frequency converter frequency of booster I 9, frequency conversion pipeline booster II 10, the cooling water flow of accurate adjustment inflow heat exchanger 2, control
The condensing water temperature that system enters condenser precision processing device 3 is less than 65 DEG C.
Under normal circumstances, it is unit style to condense water heat exchanger 2, i.e., every High Back Pressure Steam Turbine Units set one to condense hydro-thermal and handed over
Parallel operation, but be investment reduction because being in high back pressure operating condition when two units are different, pipeline boosting pumping system may be configured as
Two units are public, now, need to set up pipeline and switch valve I 16, switch valve II 17（Shown valve in dotted line frame in figure）,
Switch valve I 16, frequency conversion pipeline liter now are set on the pipeline between frequency conversion pipeline booster system and condensation water heat exchanger 2
Switch valve II 17 is set on pipeline between pump system and as the occasion requires condensation water heat exchanger 18.Solidifying shape is taken out when the unit is in
State, when as the occasion requires in high back pressure heat supply, opens switch valve II 17, closes switch valve I 16, pipeline booster is switched to as the occasion requires
Condense cooling water booster system before water heat exchanger 18.Simple system is advantageously reduced equipment investment by this prioritization scheme.
Above-described is only the preferred embodiment of the present invention, it is noted that for those skilled in the art,
Under the premise of general idea of the present invention is not departed from, some changes and improvements can also be made, these should also be considered as the present invention's
Protection domain.
Claims (5)
1. a kind of anti-overtemperature cooling system of high back pressure thermal power plant unit condensate, including condenser（1）And precision processing device of condensation water
（3）, it is characterised in that：In condenser（1）And precision processing device of condensation water（3）Between set condense water heat exchanger（2）, it is described
Condense water heat exchanger（2）One end be passed through condensate, the other end is passed through heat supply network backwater（7）It is used as cooling water.
2. the anti-overtemperature cooling system of a kind of high back pressure thermal power plant unit condensate according to claim 1, it is characterised in that：Institute
State heat supply network backwater（7）Lateral is set（20）Heat supply network backwater is introduced and condenses water heat exchanger（2）, lateral（20）On set
Pipeline boosting pumping system is put, enters condenser for distributing（1）B sides and condensation water heat exchanger（2）Heat supply network backwater amount.
3. the anti-overtemperature cooling system of a kind of high back pressure thermal power plant unit condensate according to claim 2, it is characterised in that：Institute
Stating frequency conversion pipeline booster system includes frequency conversion pipeline booster I in parallel（9）, frequency conversion pipeline booster II（10）, the pipe
Road boosting pumping system also includes and frequency conversion pipeline booster I（9）, frequency conversion pipeline booster II（10）Recirculating mass in parallel is adjusted
Save valve（11）, frequency conversion pipeline booster outlet main pipe be provided with ultrasonic flowmeter（15）.
4. the anti-overtemperature cooling system of a kind of high back pressure thermal power plant unit condensate according to claim 1, it is characterised in that：Institute
State condensation water heat exchanger（2）Condensate heat exchanger inlets valve is set on outside condensate inlet channel（12）, outlet
Valve（13）, condensation water heat exchanger is additionally arranged on the condensate inlet channel（2）When not working, enter solidifying for condensate
Tie polishing unit（3）Bypass duct, bypass valve is set on bypass duct（14）.
5. the anti-overtemperature cooling system of a kind of high back pressure thermal power plant unit condensate according to claim 2, it is characterised in that：Institute
State the unit in high back pressure operating mode when pipeline boosting pumping system can be two differences public, now frequency conversion pipeline booster system
System is with condensing water heat exchanger（2）Between pipeline on set switch valve I（16）, frequency conversion pipeline booster system with coagulating as the occasion requires
Bear water heat exchanger（18）Between pipeline on set switch valve II（17）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710459214.9A CN107120713B (en) | 2017-06-16 | 2017-06-16 | High back pressure heat supply unit condensate water prevents super temperature cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710459214.9A CN107120713B (en) | 2017-06-16 | 2017-06-16 | High back pressure heat supply unit condensate water prevents super temperature cooling system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107120713A true CN107120713A (en) | 2017-09-01 |
| CN107120713B CN107120713B (en) | 2022-09-13 |
Family
ID=59719828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710459214.9A Active CN107120713B (en) | 2017-06-16 | 2017-06-16 | High back pressure heat supply unit condensate water prevents super temperature cooling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107120713B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107780982A (en) * | 2017-12-07 | 2018-03-09 | 华电郑州机械设计研究院有限公司 | A kind of online indirect air cooling high back pressure thermal power plant unit backpressure control system and method |
| CN110553301A (en) * | 2019-09-25 | 2019-12-10 | 北京国电蓝天节能科技开发有限公司 | heat supply method and system for air cooling unit |
| CN110553300A (en) * | 2019-09-25 | 2019-12-10 | 北京国电蓝天节能科技开发有限公司 | heating system and method for wet cooling unit |
| CN111207602A (en) * | 2020-02-17 | 2020-05-29 | 北京国电蓝天节能科技开发有限公司 | High-backpressure heat supply unit condensed water grading cooling system and method |
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| CN101871674A (en) * | 2010-04-30 | 2010-10-27 | 北京中科华誉能源技术发展有限责任公司 | System for supplying heat by utilizing steam extracted from extraction steam turbine to drive heat pump |
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| CN110553300A (en) * | 2019-09-25 | 2019-12-10 | 北京国电蓝天节能科技开发有限公司 | heating system and method for wet cooling unit |
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| CN110553301B (en) * | 2019-09-25 | 2021-09-28 | 国电龙源节能技术有限公司 | Heat supply method and system for air cooling unit |
| CN111207602A (en) * | 2020-02-17 | 2020-05-29 | 北京国电蓝天节能科技开发有限公司 | High-backpressure heat supply unit condensed water grading cooling system and method |
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| Publication number | Publication date |
|---|---|
| CN107120713B (en) | 2022-09-13 |
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