CN208186475U - A kind of power station step heating system using heating steam extraction overbottom pressure - Google Patents
A kind of power station step heating system using heating steam extraction overbottom pressure Download PDFInfo
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- CN208186475U CN208186475U CN201820118706.1U CN201820118706U CN208186475U CN 208186475 U CN208186475 U CN 208186475U CN 201820118706 U CN201820118706 U CN 201820118706U CN 208186475 U CN208186475 U CN 208186475U
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- heating
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
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Abstract
The utility model discloses a kind of power station step heating systems using heating steam extraction overbottom pressure for belonging to technical field of thermoelectricity.Mainly for 300MW and its above capacitance grade cogeneration units, it is divided into four branches in heating extraction line, wherein heating extraction line branch one, two is directly connected with low vacuum condensing turbine, low parameter back pressure turbine respectively, heating extraction line branch three, four is directly connected with basic heat exchangers for district heating, spike heat exchangers for district heating respectively, and heat supply network recirculated water successively passes through low vacuum heat exchangers for district heating, basic heat exchangers for district heating, spike heat exchangers for district heating and carries out step heating.The utility model has not only recycled heating steam overbottom pressure, while realizing the step heating of heat supply network recirculated water, improves capacity usage ratio.
Description
Technical field
The utility model belongs to technical field of thermoelectricity, in particular to a kind of power station step heat supply using heating steam extraction overbottom pressure
System.
Background technique
Cogeneration of heat and power is the important measure for realizing energy-saving and emission-reduction as one of big energy conservation project in China ten.With small-sized heat supply
Unit is compared, and Large-scale machine set energy utilization rate is high, and economy is more obvious, " above presses small " background of policy greatly in fired power generating unit
Under, the enlargement of cogeneration of heat and power is becoming development trend, will have during " 13 " more large size pure condensate Transformation of Unit to be
Thermal power plant unit.
Meanwhile as the reduction of environment temperature, primary net supply water temperature generally reduce, there is heating extraction pressure and heat
Pressure unmatched problem needed for net heater, current country 300MW and its ratings above cogeneration units, wherein low pressure (LP) cylinder divides
Cylinder pressure is in 0.4 ~ 1Mpa or so, and pressure needed for heat exchangers for district heating is caused in 0.1Mpa or so, therefore in heating steam extraction link
The serious waste of high-quality steam.
Summary of the invention
The utility model provides a kind of power station step heating system using heating steam extraction overbottom pressure, which can be efficient
Using the remaining energy of heat supply steam extraction, realizes the step heating of the level-density parameter and heat supply network recirculated water of heat supply link, solve
The cogeneration units of 300MW and its ratings above parameter mismatch problem caused during heat supply steam extraction.
In order to achieve the above objectives, the utility model, which adopts the following technical scheme that, is achieved:
A kind of power station step heating system using heating steam extraction overbottom pressure, which is characterized in that heating pump-line 10, which divides, is
Four branches, heating extraction line branch 1 are connected with 5 air intake of low vacuum condensing turbine, low vacuum condensing-type steamer
5 steam drain of machine is connect with 7 air intake of low vacuum heat exchangers for district heating；Heating extraction line branch 22 and low parameter back pressure turbine 6
Air intake is connected, and 6 steam drain of low parameter back pressure turbine is connect with basic 8 air intake of heat exchangers for district heating；Heating extraction line branch
Road 33 is connected by basic heat exchangers for district heating inlet valve 17 with basic 8 air intake of heat exchangers for district heating；Heating extraction line branch four
4 are connected by spike heat exchangers for district heating inlet valve 13 with 9 air intake of spike heat exchangers for district heating；Heat supply network recirculated water passes through heat supply network return water
Pipeline 15 is supplied water after entering low vacuum heat exchangers for district heating 7, basic heat exchangers for district heating 8, spike heat exchangers for district heating 9 according to this by heat supply network
Pipeline 16 supplies heat user.
A kind of power station step heating system using heating steam extraction overbottom pressure according to claim 1, which is characterized in that
The steam discharge parameter of the low vacuum condensing turbine 5 is 0.05Mpa ~ 0.08Mpa, and low vacuum condensing turbine 5 passes through connection
Axis device drives generator 18.
A kind of power station step heating system using heating steam extraction overbottom pressure according to claim 1, which is characterized in that
The steam discharge parameter of the low parameter back pressure turbine 6 is 0.1Mpa ~ 0.12Mpa, and low parameter back pressure turbine 6 passes through shaft coupling band
Dynamic pumps for hot water supply net 14.
A kind of power station step heating system using heating steam extraction overbottom pressure according to claim 1, which is characterized in that
When basic 8 leaving water temperature of heat exchangers for district heating is lower than 95 DEG C, can be changed by adjusting basic heat exchangers for district heating inlet valve 17
Become heating steam extraction parameter, to meet the requirement of supply water temperature, the heat supply network recirculated water water outlet of basic heat exchangers for district heating 8 passes through point at this time
Peak heat exchangers for district heating bypass 22 is imported into heat supply network water supply line 16；When supply water temperature is greater than 95 DEG C, then opens spike heat supply network and add
Hot device inlet valve 24 closes spike heat exchangers for district heating bypass valve 21, while opening spike heat exchangers for district heating inlet valve 13, passes through tune
Spike heat exchangers for district heating inlet valve 13 is saved to adjust spike heat exchangers for district heating steam inlet condition, and then is matched to heat supply network supply water temperature
Suitable temperature.
The utility model has the following beneficial effects:
By adding low vacuum condensing turbine, low parameter back pressure turbine respectively on heating steam extraction branch one, two,
It can increase unit output using the overbottom pressure of steam extraction, reduce station service, improve unit heat economy.
Heat supply network recirculated water, which successively passes through low vacuum heat exchangers for district heating, basic heat exchangers for district heating, spike heat exchangers for district heating, to carry out
Step heating reduces heat exchange damage.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of power station step heating system using heating steam extraction overbottom pressure.
In figure: 1- heating extraction line branch one；2- heating extraction line branch two；3- heating extraction line branch three；
4- heating extraction line branch four；5- low vacuum condensing turbine；6- low parameter back pressure turbine；The heating of 7- low vacuum heat supply network
Device；The basic heat exchangers for district heating of 8-；9- spike heat exchangers for district heating；10- heating extraction line；11- intermediate pressure cylinder；12- low pressure (LP) cylinder；13-
Spike heat exchangers for district heating inlet valve；14- pumps for hot water supply net；15- heat supply network water return pipeline；16- heat supply network water supply line；17- is substantially warm
Net heater inlet valve；18- generator, the bypass of 19- low vacuum heat exchangers for district heating, the water inlet of 20- low vacuum heat exchangers for district heating are adjusted
Valve, 21- spike heat exchangers for district heating bypass valve, the bypass of 22- spike heat exchangers for district heating, 23- low vacuum heat exchangers for district heating bypass valve,
24- spike heat exchangers for district heating inlet valve.
Specific embodiment
The utility model provides a kind of power station step heating system using heating steam extraction overbottom pressure, with reference to the accompanying drawing and
Specific embodiment is described further this system working principle.
Fig. 1 show a kind of schematic diagram of power station step heating system using heating steam extraction overbottom pressure.
Mainly in 300MW and its pure condensate heat supply retrofitted unit of ratings above, heating pump-line 10 divides is the system
Four branches, heating extraction line branch 1 are connected with 5 air intake of low vacuum condensing turbine, low vacuum condensing-type steamer
5 steam drain of machine is connect with 7 air intake of low vacuum heat exchangers for district heating；Heating extraction line branch 22 and low parameter back pressure turbine 6
Air intake is connected, and 6 steam drain of low parameter back pressure turbine is connect with basic 8 air intake of heat exchangers for district heating；Heating extraction line branch
Road 33 is connected by basic heat exchangers for district heating inlet valve 17 with basic 8 air intake of heat exchangers for district heating；Heating extraction line branch four
4 are connected by spike heat exchangers for district heating inlet valve 13 with 9 air intake of spike heat exchangers for district heating；Heat supply network recirculated water passes through heat supply network return water
Pipeline 15 is supplied water after entering low vacuum heat exchangers for district heating 7, basic heat exchangers for district heating 8, spike heat exchangers for district heating 9 according to this by heat supply network
Pipeline 16 supplies heat user.
Specifically, the steam discharge parameter of low vacuum condensing turbine 5 is 0.05Mpa ~ 0.08Mpa, low vacuum condensing-type
Steam turbine 5 drives generator 18 by shaft coupling, and 5 steam discharge of low vacuum condensing turbine is used for heating part heat supply network recirculated water,
7 inflow of low vacuum heat exchangers for district heating, another part heat are adjusted by adjusting low vacuum heat exchangers for district heating inlet regulating valve 20
After net recirculated water is directly over heat supply network recirculated water bypass 19, mixed with the outlet heat supply network recirculated water of low vacuum heat exchangers for district heating 7, so
Enter basic heat exchangers for district heating 8 jointly afterwards；The steam discharge parameter of low parameter back pressure turbine 6 is 0.1Mpa ~ 0.12Mpa, low parameter
Back pressure turbine 6 drives pumps for hot water supply net 14 by shaft coupling；It, can when basic 8 leaving water temperature of heat exchangers for district heating is lower than 95 DEG C
Change heating steam extraction parameter by adjusting basic heat exchangers for district heating inlet valve 17, to meet the requirement of supply water temperature, base at this time
The heat supply network recirculated water water outlet of this heat exchangers for district heating 8 is imported into heat supply network water supply line 16 by spike heat exchangers for district heating bypass 22；When
When supply water temperature is greater than 95 DEG C, then spike heat exchangers for district heating inlet valve 24 is opened, closes spike heat exchangers for district heating bypass valve 21, together
Shi Kaiqi spike heat exchangers for district heating inlet valve 13 adjusts the heating of spike heat supply network by adjusting spike heat exchangers for district heating inlet valve 13
Device steam inlet condition, and then heat supply network supply water temperature is made to be matched to suitable temperature.
Claims (4)
1. a kind of power station step heating system using heating steam extraction overbottom pressure, which is characterized in that heating pump-line (10) is divided into
Four branches, heating extraction line branch one (1) are connected with low vacuum condensing turbine (5) air intake, low vacuum condensing-type
Steam turbine (5) steam drain is connect with low vacuum heat exchangers for district heating (7) air intake；Heating extraction line branch two (2) and low parameter
Back pressure turbine (6) air intake is connected, and low parameter back pressure turbine (6) steam drain and basic heat exchangers for district heating (8) air intake connect
It connects；Heating extraction line branch three (3) passes through basic heat exchangers for district heating inlet valve (17) and basic heat exchangers for district heating (8) air intake
It is connected；Heating extraction line branch four (4) passes through spike heat exchangers for district heating inlet valve (13) and spike heat exchangers for district heating (9) into vapour
Mouth is connected；Heat supply network recirculated water enters low vacuum heat exchangers for district heating (7) by heat supply network water return pipeline (15) according to this, basic heat supply network heats
Device (8), spike heat exchangers for district heating (9) supply heat user by heat supply network water supply line (16) afterwards.
2. a kind of power station step heating system using heating steam extraction overbottom pressure according to claim 1, which is characterized in that institute
The steam discharge parameter for stating low vacuum condensing turbine (5) is 0.05Mpa ~ 0.08Mpa, and low vacuum condensing turbine (5) passes through
Shaft coupling drives generator (18).
3. a kind of power station step heating system using heating steam extraction overbottom pressure according to claim 1, which is characterized in that institute
The steam discharge parameter for stating low parameter back pressure turbine (6) is 0.1Mpa ~ 0.12Mpa, and low parameter back pressure turbine (6) passes through shaft coupling
It drives pumps for hot water supply net (14).
4. a kind of power station step heating system using heating steam extraction overbottom pressure according to claim 1, which is characterized in that when
When basic heat exchangers for district heating (8) leaving water temperature is lower than 95 DEG C, can by adjust basic heat exchangers for district heating inlet valve (17) come
Change heating steam extraction parameter, to meet the requirement of supply water temperature, the heat supply network recirculated water water outlet of basic heat exchangers for district heating (8) is logical at this time
It crosses spike heat exchangers for district heating bypass (22) and is imported into heat supply network water supply line (16)；When supply water temperature is greater than 95 DEG C, then point is opened
Peak heat exchangers for district heating inlet valve (24), close spike heat exchangers for district heating bypass valve (21), while open spike heat exchangers for district heating into
Steam valve (13) adjusts spike heat exchangers for district heating steam inlet condition by adjusting spike heat exchangers for district heating inlet valve (13), and then makes
Heat supply network supply water temperature is matched to suitable temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820118706.1U CN208186475U (en) | 2018-01-24 | 2018-01-24 | A kind of power station step heating system using heating steam extraction overbottom pressure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820118706.1U CN208186475U (en) | 2018-01-24 | 2018-01-24 | A kind of power station step heating system using heating steam extraction overbottom pressure |
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| CN208186475U true CN208186475U (en) | 2018-12-04 |
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| CN201820118706.1U Expired - Fee Related CN208186475U (en) | 2018-01-24 | 2018-01-24 | A kind of power station step heating system using heating steam extraction overbottom pressure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915221A (en) * | 2019-01-31 | 2019-06-21 | 西安西热节能技术有限公司 | A kind of internal bypass steamer dragging system and method applied to cogeneration units |
| CN113027540A (en) * | 2021-03-17 | 2021-06-25 | 西安西热节能技术有限公司 | Different load vapour electricity that can excess pressure utilizes drives steam extraction heating system doubly |
| CN114000924A (en) * | 2021-09-16 | 2022-02-01 | 国能(福州)热电有限公司 | Cogeneration centralized steam supply system and control method thereof |
-
2018
- 2018-01-24 CN CN201820118706.1U patent/CN208186475U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915221A (en) * | 2019-01-31 | 2019-06-21 | 西安西热节能技术有限公司 | A kind of internal bypass steamer dragging system and method applied to cogeneration units |
| CN113027540A (en) * | 2021-03-17 | 2021-06-25 | 西安西热节能技术有限公司 | Different load vapour electricity that can excess pressure utilizes drives steam extraction heating system doubly |
| CN114000924A (en) * | 2021-09-16 | 2022-02-01 | 国能(福州)热电有限公司 | Cogeneration centralized steam supply system and control method thereof |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20181204 Termination date: 20220124 |