CN108488872A - A kind of low-quality steam heating system applied to wet type cooling unit - Google Patents
A kind of low-quality steam heating system applied to wet type cooling unit Download PDFInfo
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- CN108488872A CN108488872A CN201810262327.4A CN201810262327A CN108488872A CN 108488872 A CN108488872 A CN 108488872A CN 201810262327 A CN201810262327 A CN 201810262327A CN 108488872 A CN108488872 A CN 108488872A
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- heater
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 44
- 238000001816 cooling Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000012530 fluid Substances 0.000 claims description 15
- 230000001939 inductive effect Effects 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 2
- 238000009792 diffusion process Methods 0.000 claims 1
- 238000000605 extraction Methods 0.000 abstract description 9
- 230000009466 transformation Effects 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 8
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002699 waste material 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
- F24D1/00—Steam central heating systems
- F24D1/02—Steam central heating systems operating with live steam
-
- 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
- F24D1/00—Steam central heating systems
- F24D1/08—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
The invention discloses a kind of low-quality steam heating systems applied to wet type cooling unit comprising heat exchangers for district heating, heat exchangers for district heating connect intermediate pressure cylinder blow-off line, and low-quality steam heating system further includes：Low pressure (LP) cylinder, low pressure (LP) cylinder are connect with intermediate pressure cylinder blow-off line；Several low-pressure heaters, these low-pressure heaters are connect with low pressure (LP) cylinder；Condenser, condenser are connect with low pressure (LP) cylinder；The steam inlet of at least one jet pump, each jet pump connects intermediate pressure cylinder blow-off line, and the pump orifice of each jet pump is separately connected the pipeline between each low-pressure heater and low pressure (LP) cylinder；Heater, heater are separately connected the jet port, heat exchangers for district heating and heat supply network water return pipeline of each jet pump.For the present invention without carrying out low pressure (LP) cylinder transformation, construction is relatively easy, using lower #7, #8 low-temperature heater steam extraction of quality, heats heat supply network recirculated water, that is, makes full use of the thermal energy of low-quality steam, improve heat supply network circulating water temperature, improves unit heat capacity.
Description
Technical field
The present invention relates to a kind of heating systems, and in particular to a kind of low-quality steam heating system applied to wet type cooling unit
System.
Background technology
In recent years, under the encouraging and facilitating of national energy conservation and emission reduction policy, each electricity power enterprise is having the ground for heat condition
Area carries out thermal power plant unit transformation by various technologies and increases heat capacity, meets winter city heating demands, this development has become
For inexorable trend.
Currently, the unit heat supply transformation generally use punching technologies such as steam extraction and steam turbine high back pressure improve heat supply network recirculated water and go out
Coolant-temperature gage.
Steam turbine high back pressure technology is by the way that low pressure (LP) cylinder and rotor is transformed or improves unit back pressuce by combustion adjustment；It is air-cooled
Unit high back pressure heat supply transformation is relatively easy, and back pressure can be improved by Air-Cooling Island combustion adjustment, and wet type cooling unit is because of its operation back of the body
Press relatively low, usual 4-6KPa or so, winter condition reaches rated value hereinafter, being taken compared with hard-pumped, needs to carry out low pressure (LP) cylinder complicated
Tong Liao area, great in constructing amount, cost is higher.
Invention content
The present invention to solve the above-mentioned problems, to provide a kind of low-quality steam heating system applied to wet type cooling unit
System.
In order to achieve the above objectives, technical scheme is as follows：
A kind of low-quality steam heating system applied to wet type cooling unit, the low-quality steam heating system includes heat supply network
Heater, the heat exchangers for district heating connect intermediate pressure cylinder blow-off line by pipeline, and the low-quality steam heating system further includes：
Low pressure (LP) cylinder, the low pressure (LP) cylinder are connect by pipeline with intermediate pressure cylinder blow-off line；
Several low-pressure heaters include the #6 low-pressure heaters 310, #7 low-pressure heaters 320 and #8 low pressure being sequentially connected in series
Heater 330, #8 low-pressure heaters 330 are connect with condenser；
Condenser, the condenser are connect by pipeline with low pressure (LP) cylinder, and the condenser also passes through pipeline and low-pressure heating
Device is connected；
The steam inlet of at least one jet pump, each jet pump connects intermediate pressure cylinder blow-off line by pipeline, each to spray
The pump orifice for penetrating pump connects pipeline between each low-pressure heater and low pressure (LP) cylinder by pipeline respectively；
Heater, the heater are separately connected the jet port, heat exchangers for district heating and heat supply network of each jet pump by pipeline
Water return pipeline.
In a preferred embodiment of the invention, several low-pressure heaters include the #6 low-pressure heatings being sequentially connected in series
Device, #7 low-pressure heaters and #8 low-pressure heaters, #8 low-pressure heaters are connect with condenser.
In a preferred embodiment of the invention, the heater is STEJE heaters.
In a preferred embodiment of the invention, it is respectively equipped on the pipeline between each low-pressure heater and low pressure (LP) cylinder
First isolating valve.
In a preferred embodiment of the invention, between the pump orifice of jet pump and each low-pressure heater and low pressure (LP) cylinder
Pipeline connection pipeline on be respectively equipped with the second isolating valve, the pipe between the steam inlet and intermediate pressure cylinder blow-off line of jet pump
Road is equipped with third isolating valve, and the pipeline between the jet port and heater of jet pump is equipped with the 4th isolating valve.
In a preferred embodiment of the invention, the pipeline between heat exchangers for district heating and intermediate pressure cylinder blow-off line is equipped with
5th isolating valve.
In a preferred embodiment of the invention, the mass ratio of induced-to-inducing air of the jet port of the jet pump is：
Wherein,
Wherein,f3For mixing chamber sectional area, m2；f1For main jet discharge area, m2； For main jet loss coefficient,For suction chamber loss coefficient, Δ ppFor working fluid and by injection
Fluid enters pressure difference when pump, Pa, Δ pdFor the value added of driven fluid pressure after jet pump, Pa,It is hybrid
Loss coefficient,For Loss of injector coefficient；υp、υH、υdRespectively working fluid, driven fluid, injection pump discharge mixed flow
The ratio volume of body, m3/kg。
The beneficial effects of the invention are as follows：
The configuration of the present invention is simple, without carrying out low pressure (LP) cylinder transformation, construction is relatively easy, low using quality lower #7, #8
Heat supply network recirculated water is heated in warm heater steam extraction, that is, makes full use of the thermal energy of low-quality steam, improves heat supply network circulating water temperature, improves
Unit heat capacity.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is the structural diagram of the present invention.
Specific implementation mode
In order to make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be easy to understand, tie below
Conjunction is specifically illustrating, and the present invention is further explained.
Referring to Fig. 1, the low-quality steam heating system provided by the invention applied to wet type cooling unit comprising heat supply network heats
Device 100, low pressure (LP) cylinder 200, several low-pressure heaters, condenser 400, at least one jet pump 500 and heater 600.
Heat exchangers for district heating 100 can connect intermediate pressure cylinder blow-off line by pipeline, and heat exchangers for district heating 100 can be with intermediate pressure cylinder
Steam discharge is that heat source heats heat supply network return water, reaches heat supply network water supply requirement.
Since the quality of the intermediate pressure cylinder steam discharge of intermediate pressure cylinder blow-off line discharge is very high, returned if being only used for heating heat supply network
Water can cause to waste.
In addition, above-mentioned heating in winter when can not also implement.
The application in system heating system by being arranged low pressure (LP) cylinder 200, several low-pressure heaters, condenser 400, extremely
A few jet pump 500 and heater 600, can greatly save resource, and can also be suitble to use in winter.
Low pressure (LP) cylinder 200 connects intermediate pressure cylinder blow-off line by pipeline.
Several low-pressure heaters, these low-pressure heaters 300 are sequentially connected in series, and are specifically included the #6 low pressure being sequentially connected in series and are added
Hot device 310, #7 low-pressure heaters 320 and #8 low-pressure heaters 330, these low-pressure heaters 300 are connected by pipeline low respectively
Cylinder pressure 200.
Condenser 400 is separately connected #8 low-pressure heaters 330 and low pressure (LP) cylinder 200 by pipeline, is with then realizing
The steam extraction step by step of each low-pressure heater 300.
The specific number of jet pump 500 can be depending on actual demand, and the number in the present embodiment is specially 1, jet pump
500 steam inlet connects intermediate pressure cylinder blow-off line by pipeline, and the pump orifice of jet pump is connected by pipeline each low respectively
Press the pipeline between the 200 of heater 300 and low pressure (LP) cylinder.
Jet pump 500 can mix the steam extraction of intermediate pressure cylinder steam discharge and #7 low-pressure heaters 320 and #8 low-pressure heaters 330
It closes, the low-quality steam of mixing is then conveyed to heater 600.
By taking 300MW wet type cooling units as an example, 400 back pressure of condenser is 4.9KPa, #8 low-pressure heaters under 75% load condition
330 extraction pressure 17KPa, 58 DEG C of temperature；320 extraction pressure 47KPa of #7 low-pressure heaters, 81 DEG C of temperature；400 back pressure of condenser
Relatively low, steam exhaust is difficult to be utilized, and passes through the #7 low-pressure heaters 320 and #8 low pressure before 500 draws low pressure cylinder of jet pump, 200 steam discharge
The steam extraction of heater 330, quality is relatively low, utilizes 500 technology of jet pump, you can by Btu utilization to heat network system, improves
Heat supply network circulating water temperature.
Using low-quality steam heating, economy depends on spray much larger than power generation, the aspiration of low-quality steam heating
The performance for penetrating pump 500, in order to realize that the low-quality steam that jet pump 500 sprays enables to heater 600 to return heat supply network
Water is heated, and the mass ratio of induced-to-inducing air of the jet port of jet pump 500 is：
Wherein,
Wherein,f3For mixing chamber sectional area, m2；f1For main jet discharge area, m2； For main jet loss coefficient,For suction chamber loss coefficient, Δ ppFor working fluid and by injection
Fluid enters pressure difference when pump, Pa, Δ pdFor the value added of driven fluid pressure after jet pump, Pa,It is hybrid
Loss coefficient,For Loss of injector coefficient；υp、υH、υdRespectively working fluid, driven fluid, injection pump discharge mixed flow
The ratio volume of body, m3/kg。
Above-mentioned mass ratio of induced-to-inducing air is the application by numerous experiments and makes the creative labor movable, is only used above-mentioned
Mass ratio of induced-to-inducing air, heater 600 can just carry out heat supply network return water heating and energy-saving effect is best.
Heater 600 is specially STEJE heaters, and jet port, the heat of jet pump 500 are separately connected by pipeline
Net heater 100 and heat supply network water return pipeline.
Heat supply network return water is conveyed to heater 600 by heat supply network water return pipeline, and then heater 600 passes through jet pump 500 again
The low-quality steam of input is heated, and the heat supply network return water after heating is then conveyed to heat exchangers for district heating 100, heat exchangers for district heating
100, which do not work, directly carries out heat supply network water supply.
For the ease of controlling the connection between above-mentioned all parts, between each low-pressure heater 300 and low pressure (LP) cylinder 200
The first isolating valve 710 is respectively equipped on pipeline；
On the pipeline of pipeline connection between the pump orifice of jet pump 500 and each low-pressure heater 300 and low pressure (LP) cylinder 200
It is respectively equipped with the second isolating valve 720, the pipeline between the steam inlet and intermediate pressure cylinder blow-off line of jet pump 500 is equipped with third
Isolating valve 730, the pipeline between the jet port and heater 600 of jet pump 500 are equipped with the 4th isolating valve 740；
Pipeline between heat exchangers for district heating 100 and intermediate pressure cylinder blow-off line is equipped with the 5th isolating valve 750, intermediate pressure cylinder steam discharge
Pipeline is equipped with the 6th isolating valve 760.
Here is the specific work process of the application：
Low pressure (LP) cylinder 200 is closed with first on the pipeline between #7 low-pressure heaters 320 and #8 low-pressure heaters 330 to be isolated
Valve 710 is then turned on low pressure (LP) cylinder 200 to the steam inlet of each second isolating valve 720, jet pump 500 between jet pump 500
Pipeline between intermediate pressure cylinder blow-off line is equipped with third isolating valve 730, jet pump 500 is exported to being isolated for heater 600
Valve 740, the then work of jet pump 500, by the steam extraction of intermediate pressure cylinder steam discharge and #7 low-pressure heaters 320 and #8 low-pressure heaters 330
It is mixed, the low-quality steam of mixing is then conveyed to heater 600, make full use of its thermal energy, heat heat supply network return water, it can
So that the middle displacement of heat exchangers for district heating 100 is reduced, improves unit economy.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (7)
1. a kind of low-quality steam heating system applied to wet type cooling unit, the low-quality steam heating system includes that heat supply network adds
Hot device, the heat exchangers for district heating connect intermediate pressure cylinder blow-off line by pipeline, which is characterized in that the low-quality steam heating system
System further includes：
Low pressure (LP) cylinder, the low pressure (LP) cylinder are connect by pipeline with intermediate pressure cylinder blow-off line；
Several low-pressure heaters, these low-pressure heaters are sequentially connected in series, these low-pressure heaters pass through pipeline and low pressure respectively
Cylinder connects；
Condenser, the condenser are connect by pipeline with low pressure (LP) cylinder, and the condenser also passes through pipeline and low-pressure heater string
Connection；
The steam inlet of at least one jet pump, each jet pump connects intermediate pressure cylinder blow-off line, each jet pump by pipeline
Pump orifice the pipeline between each low-pressure heater and low pressure (LP) cylinder is connected by pipeline respectively；
Heater, the heater are separately connected the jet port, heat exchangers for district heating and heat supply network return water of each jet pump by pipeline
Pipeline.
2. a kind of low-quality steam heating system applied to wet type cooling unit according to claim 1, which is characterized in that if
A dry low-pressure heater includes the #6 low-pressure heaters, #7 low-pressure heaters and #8 low-pressure heaters being sequentially connected in series, and #8 low pressure adds
Hot device is connect with condenser.
3. a kind of low-quality steam heating system applied to wet type cooling unit according to claim 1, which is characterized in that institute
It is STEJE heaters to state heater.
4. a kind of low-quality steam heating system applied to wet type cooling unit according to claim 1, which is characterized in that each
The first isolating valve is respectively equipped on pipeline between a low-pressure heater and low pressure (LP) cylinder.
5. a kind of low-quality steam heating system applied to wet type cooling unit according to claim 1, which is characterized in that spray
It is respectively equipped with the second isolating valve on the pipeline for the pipeline connection penetrated between the pump orifice of pump and each low-pressure heater and low pressure (LP) cylinder,
Pipeline between the steam inlet and intermediate pressure cylinder blow-off line of jet pump is equipped with third isolating valve, the jet port of jet pump with plus
Pipeline between hot device is equipped with the 4th isolating valve.
6. a kind of low-quality steam heating system applied to wet type cooling unit according to claim 1, which is characterized in that heat
Pipeline between net heater and intermediate pressure cylinder blow-off line is equipped with the 5th isolating valve.
7. a kind of low-quality steam heating system applied to wet type cooling unit according to claim 1, which is characterized in that institute
The mass ratio of induced-to-inducing air for stating the jet port of jet pump is：
Wherein,
Wherein,f3For mixing chamber sectional area, m2；f1For main jet discharge area, m2；
For main jet loss coefficient,For suction chamber loss coefficient, Δ ppEnter pressure when pump for working fluid and driven fluid
Force difference, Pa, Δ pdFor the value added of driven fluid pressure after jet pump, Pa,For hybrid loss coefficient,For diffusion
Pipe loss coefficient；υp、υH、υdThe respectively ratio volume of working fluid, driven fluid, jet pump outlet mixture stream, m3/kg。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810262327.4A CN108488872B (en) | 2018-03-28 | 2018-03-28 | Low-quality steam heating system applied to wet cooling unit |
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| CN201810262327.4A CN108488872B (en) | 2018-03-28 | 2018-03-28 | Low-quality steam heating system applied to wet cooling unit |
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| CN108488872A true CN108488872A (en) | 2018-09-04 |
| CN108488872B CN108488872B (en) | 2024-03-01 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU800396A1 (en) * | 1979-01-29 | 1981-01-30 | Всесоюзный Дважды Ордена Трудовогокрасного Знамени Теплотехническийнаучно-Исследовательский Институтим.Ф.Э.Дзержинского | Thermal power plant |
| CN205477782U (en) * | 2016-03-16 | 2016-08-17 | 华北电力大学 | Utilize ejector to adjust power generation system of little steam turbine of air supply drive water -feeding pump |
| CN206683026U (en) * | 2017-03-21 | 2017-11-28 | 华北电力大学 | A kind of heat supply network multi-heat source co-generation unit based on level-density parameter |
| CN206831646U (en) * | 2017-06-19 | 2018-01-02 | 北京北方三合能源技术有限公司 | A kind of fired power generating unit is exhaust heat stepped to utilize heating system |
| CN208222620U (en) * | 2018-03-28 | 2018-12-11 | 程琛 | A kind of low-quality steam heating system applied to wet type cooling unit |
-
2018
- 2018-03-28 CN CN201810262327.4A patent/CN108488872B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU800396A1 (en) * | 1979-01-29 | 1981-01-30 | Всесоюзный Дважды Ордена Трудовогокрасного Знамени Теплотехническийнаучно-Исследовательский Институтим.Ф.Э.Дзержинского | Thermal power plant |
| CN205477782U (en) * | 2016-03-16 | 2016-08-17 | 华北电力大学 | Utilize ejector to adjust power generation system of little steam turbine of air supply drive water -feeding pump |
| CN206683026U (en) * | 2017-03-21 | 2017-11-28 | 华北电力大学 | A kind of heat supply network multi-heat source co-generation unit based on level-density parameter |
| CN206831646U (en) * | 2017-06-19 | 2018-01-02 | 北京北方三合能源技术有限公司 | A kind of fired power generating unit is exhaust heat stepped to utilize heating system |
| CN208222620U (en) * | 2018-03-28 | 2018-12-11 | 程琛 | A kind of low-quality steam heating system applied to wet type cooling unit |
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