CN207813667U - Low pressure cylinder cooling system based on different steam ports - Google Patents
Low pressure cylinder cooling system based on different steam ports Download PDFInfo
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- CN207813667U CN207813667U CN201721783749.3U CN201721783749U CN207813667U CN 207813667 U CN207813667 U CN 207813667U CN 201721783749 U CN201721783749 U CN 201721783749U CN 207813667 U CN207813667 U CN 207813667U
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Abstract
The utility model discloses a kind of low pressure cylinder cooling systems based on different steam ports.When turbine low pressure cylinder is not into vapour, due to windage loss so that temperature gradually rises in turbine low pressure cylinder, windage loss occurs at first for the final stage of especially turbine low pressure cylinder, and temperature is raised very fast.In the utility model, Steam Turbine Through IP Admission steam drain is connected by the air intake of communicating pipe and turbine low pressure cylinder, it is provided with cooling steam pipe simultaneously, the import and export of cooling steam pipe is connect with the air intake of Steam Turbine Through IP Admission steam drain and turbine low pressure cylinder respectively, it is additionally provided with cooling steam branch pipe, the import and export of cooling steam branch pipe is low with the No.1 of the venthole of water separator and turbine low pressure cylinder respectively plus extraction opening is connect.The utility model realizes while integrally being cooled down to turbine low pressure cylinder by the way that different cooling steam air intakes is arranged in turbine low pressure cylinder, also effectively realizes the cooling of turbine low pressure cylinder final stage.
Description
Technical field
The utility model belongs to cogeneration of heat and power technical field, and in particular to the low pressure (LP) cylinder cooling system based on different steam ports
System, is particularly suitable for low pressure (LP) cylinder not into the steam power plant of vapour.
Background technology
Currently, China's policy gradually payes attention to the popularization of new energy, the ratio of fired power generating unit is reduced.For thermal power plant,
The steam exhaust of steam turbine is typically to be fallen by air-cooled or water-cooling pattern direct emission, this has resulted in huge cold end loss.
Such as the capacity usage ratio of the subcritical pure condensate units of 300MW is about 38%, wherein cold end loss accounts for about 45%, after extraction for heat supply
The capacity usage ratio of unit is promoted to 60%, but still has 20% condensation low temperature exhaust heat to be discharged, this partial heat is due to product
Position is low and is difficult to directly utilize.Simultaneously as power grid is consumption new energy electric power, the requirement to coal motor group thermoelectricity flexibility is not
Disconnected to reinforce, coal motor group need to realize Ultra-low load operation, could meet the peak regulation demand of power grid, this brings to coal-fired thermal power unit
Great challenge.
The Chinese patent of Patent No. 201710193938.3 discloses " steam turbine extraction condensing back pressure system and its adjusting method ",
Nothing needs to change rotor in the system, you can realizes that low pressure (LP) cylinder does not put into operation, which can both increase externally to the greatest extent
Heating load, and can be generated electricity with the realization unit underload of high benefit.When turbine low pressure cylinder is not into vapour, since windage loss makes
It obtains temperature in turbine low pressure cylinder to gradually rise, windage loss, temperature liter occur at first for the final stage of especially turbine low pressure cylinder
High is very fast, need to integrally be cooled down to turbine low pressure cylinder, meanwhile, it also needs to adopt an effective measure to turbine low pressure cylinder final stage
It carries out effectively cooling.
Invention content
Based on the above situation, the utility model overcomes above-mentioned deficiency existing in the prior art, it is proposed that a kind of design conjunction
Reason, dependable performance are advantageously implemented the low pressure cylinder cooling system based on different steam ports of the more preferable cooling effect of low pressure (LP) cylinder.
The technical scheme in the invention for solving the above technical problem is：A kind of low pressure (LP) cylinder based on different steam ports
Cooling system, including Steam Turbine Through IP Admission, turbine low pressure cylinder, condenser, condensate pump, No.1 be low plus heater, No. two it is low
Add heater, No. three low plus heater, No. four low plus heater, reducing-and-cooling plant, water separator, steam condenser and
Heat supply network heat exchanger；It is characterized in that, the steam drain of the Steam Turbine Through IP Admission by communicating pipe and turbine low pressure cylinder into vapour
Mouth connection, and hydraulic pressure butterfly valve is housed on communicating pipe；The steam drain of the Steam Turbine Through IP Admission is also associated with cooling steam pipe, three
Number low plus extraction steam pipe and heating extraction steam pipe；The steam drain of the turbine low pressure cylinder is connect with condenser；The condenser it is cold
But water side is connected with periodical feeding pipe and recirculation return pipe；The water inlet of boiler feed pipe is connect with condenser, and is given in boiler
Water pipe upper edge dampening flow direction is sequentially installed with that condensate pump, No.1 be low plus heater, No. two low plus heater, No. three it is low plus
Heater and No. four low plus heaters；The No.1 is low plus heater adds the one of extraction steam pipe and turbine low pressure cylinder by the way that No.1 is low
The connection of number low plus extraction opening, and No.1 is low plus extraction steam pipe on the second gate valve is installed；Described No. two low plus heater passes through two
No. two low plus extraction opening connections of number low plus extraction steam pipe and turbine low pressure cylinder, and No. two low plus extraction steam pipe on be equipped with first
Gate valve；Described No. three low plus heaters are connected by the steam drain of No. three low plus extraction steam pipes and Steam Turbine Through IP Admission；Described No. four
Low plus heater is connected by No. four extraction openings of No. four low plus extraction steam pipes and Steam Turbine Through IP Admission；The heat supply network heat exchanger into
Steam ports is connected by heating extraction steam pipe and the steam drain of Steam Turbine Through IP Admission, and the drain port of heat supply network heat exchanger passes through heating drain pipe
Low with No. three plus heater water inlet is connect, and the water side of heat supply network heat exchanger is also associated with heat supply network return pipe and heat supply network feed pipe；
The air intake of the cooling steam pipe and the steam drain of Steam Turbine Through IP Admission connect, the venthole and steamer of the cooling steam pipe
The air intake of machine low pressure (LP) cylinder connects, and moves direction along steam stream on cooling steam pipe and be sequentially installed with the first shut-off valve, subtract
Warm decompressor, water separator, the first regulating valve and the second shut-off valve.
Preferably, the venthole of the water separator also passes through the one of cooling steam branch pipe and turbine low pressure cylinder
The connection of number low plus extraction opening, and third shut-off valve, steam condenser, the second regulating valve are sequentially installed on cooling steam branch pipe
With the 4th shut-off valve.
Preferably, the cooling water side of the steam condenser is connected with cooling water inlet pipe and cooling water outlet pipe.
Preferably, the cooling water source of the steam condenser may be from power plant's low-temperature circulating water, power plant's softened water or electricity
Factory's boiler replenishing water.
The utility model compared with prior art, has the following advantages and effect：1）The utility model is designed reasonably, structure
Simply, dependable performance, cooling effect are notable；2）The utility model by turbine low pressure cylinder be arranged different cooling steams into
Steam ports realizes while integrally being cooled down to turbine low pressure cylinder, also effectively realizes turbine low pressure cylinder final stage
It is cooling.
Description of the drawings
Fig. 1 is the structural schematic diagram of the low pressure cylinder cooling system based on different steam ports in the utility model embodiment.
Specific implementation mode
The utility model is described in further detail below in conjunction with the accompanying drawings and by embodiment, and following embodiment is pair
The explanation of the utility model and the utility model is not limited to following embodiment.
Referring to Fig. 1, a kind of low pressure cylinder cooling system based on different steam ports, including Steam Turbine Through IP Admission 1, steam turbine
Low pressure (LP) cylinder 2, condenser 3, condensate pump 4, No.1 are low to add heater 5, two is low plus heater 6, three is low to add heater 7, four
Number low plus heater 8, reducing-and-cooling plant 9, water separator 10, steam condenser 11 and heat supply network heat exchanger 12；Steam turbine
The steam drain of intermediate pressure cylinder 1 is connect by communicating pipe 31 with the air intake of turbine low pressure cylinder 2, and hydraulic pressure is housed on communicating pipe 31
Butterfly valve 21；The steam drain of Steam Turbine Through IP Admission 1 is also associated with that cooling steam pipe 32, three is low plus extraction steam pipe 41 and heating extraction steam pipe
44；The steam drain of turbine low pressure cylinder 2 is connect with condenser 3；The cooling water side of condenser 3 is connected with periodical feeding pipe 37 and follows
Loopback water pipe 38；The water inlet of boiler feed pipe 43 is connect with condenser 3, and in 43 upper edge dampening flow direction of boiler feed pipe
Be sequentially installed with that condensate pump 4, No.1 be low plus heater 5, two is low plus heater 6, three is low plus heater 7 and No. four it is low plus
Heater 8；No.1 is low plus heater 5 adds extraction steam pipe 39 low with the No.1 of turbine low pressure cylinder 2 plus extraction opening company by the way that No.1 is low
Connect, and No.1 is low plus extraction steam pipe 39 on the second gate valve 29 is installed；No. two low plus heaters 6 pass through No. two low plus extraction steam pipes 40
Plus extraction opening low with No. two of turbine low pressure cylinder 2 connect, and No. two it is low add first gate valve 28 is installed on extraction steam pipe 40；Three
Number low plus heater 7 is low plus extraction steam pipe 41 is connect with the steam drain of Steam Turbine Through IP Admission 1 by No. three；No. four low plus heaters 8
By the way that No. four low plus extraction steam pipe 42 is connect with No. four extraction openings of Steam Turbine Through IP Admission 1；The air intake of heat supply network heat exchanger 12 passes through
Heating extraction steam pipe 44 is connect with the steam drain of Steam Turbine Through IP Admission 1, and the drain port of heat supply network heat exchanger 12 passes through heating drain pipe 45
Low with No. three plus heater 7 water inlet is connect, and the water side of heat supply network heat exchanger 12 is also associated with heat supply network return pipe 46 and heat supply network supplies
Water pipe 47；The air intake of cooling steam pipe 32 is connect with the steam drain of Steam Turbine Through IP Admission 1, the venthole of cooling steam pipe 32 with
The air intake of turbine low pressure cylinder 2 connects, and moves direction along steam stream on cooling steam pipe 32 and be sequentially installed with first section
Only valve 22, reducing-and-cooling plant 9, water separator 10, the first regulating valve 23 and the second shut-off valve 24.
The venthole of water separator 10 also adds pumping by the way that cooling steam branch pipe 34 is low with the No.1 of turbine low pressure cylinder 2
Steam ports connects, and third shut-off valve 25, steam condenser 11, the second regulating valve 26 are sequentially installed on cooling steam branch pipe 34
With the 4th shut-off valve 27；The cooling water side of steam condenser 11 is connected with cooling water inlet pipe 35 and cooling water outlet pipe 36.
The cooling water source of steam condenser 11 may be from power plant's low-temperature circulating water, power plant's softened water or boiler of power plant moisturizing.
The concrete operations of the present embodiment are as follows：
In supplying thermal condition, the first shut-off valve 22, the second shut-off valve 24, third shut-off valve 25 and the 4th shut-off valve are closed
27, the cooling steam system of turbine low pressure cylinder 2 does not put into operation；The aperture of hydraulic pressure butterfly valve 21, a part of steamer are adjusted at this time
The steam discharge of machine intermediate pressure cylinder 1, which enters turbine low pressure cylinder 2, to be continued to do work, and the steam discharge of another part Steam Turbine Through IP Admission 1 enters heat supply network
12 external heat supply of heat exchanger, heat supply network is hydrophobic to be delivered to No. three low plus heaters 7；At this point, standard-sized sheet the first gate valve 28 and the second gate valve
29, the part steam extraction of turbine low pressure cylinder 2 respectively enters low No.1 plus heater 5 and No. two low plus the heating kettle successively of heater 6
Stove water supply, the part steam extraction of Steam Turbine Through IP Admission 1 respectively enters No. three low plus heaters 7 and No. four low plus heater 8 successively plus
Heat boiler water supply.
In back pressure operating mode, the steam discharge of fully closed hydraulic pressure butterfly valve 21, Steam Turbine Through IP Admission 1 is all confessed by heating extraction steam pipe 32
External heat supply；The first shut-off valve 22 and the second shut-off valve 24, the cooling steam system input fortune of turbine low pressure cylinder 2 are opened at this time
Row；At this time the steam discharge of a small amount of Steam Turbine Through IP Admission 1 after pressure and temperature reducing and steam-water separation by turbine low pressure cylinder 2 into vapour
Mouth enters, and is cooled down to turbine low pressure cylinder 2；At this point, closing the first gate valve 28 and the second gate valve 29, turbine low pressure cylinder 2
There is no steam extractions to respectively enter low No.1 plus heater 5 and No. two low plus heaters 6；At this time according to the temperature of turbine low pressure cylinder 2
Monitoring system is spent, according to temperature height, it is determined whether come into operation cooling steam branch pipe 34；When the final stage of turbine low pressure cylinder 2
When temperature is higher, third shut-off valve 25 and the 4th shut-off valve 27 are opened, part cooling steam is carried out by cooling steam branch pipe 34
Extraction opening is added to enter turbine low pressure cylinder 2 by the way that the No.1 of turbine low pressure cylinder 2 is low after cooling down again, to turbine low pressure cylinder 2
Final stage is cooled down；The cooling steam of different air intakes can be controlled by adjusting the first regulating valve 23 and the second regulating valve 26
Flow.
Furthermore, it is necessary to illustrate, the specific embodiment described in this specification, the shape of parts and components is named
Claiming etc. can be different, described in this specification above content is only to the utility model structure example explanation.
The equivalence changes or simple change that all structure, feature and principles according to described in the utility model patent concept are done, are wrapped
It includes in the protection domain of the utility model patent.Those skilled in the art of the present invention can be to described
Specific embodiment does various modifications or additions or substitutes by a similar method, without departing from the knot of the utility model
Structure or beyond the scope defined by this claim, all should belong to the protection range of the utility model.
Claims (3)
1. a kind of low pressure cylinder cooling system based on different steam ports, including Steam Turbine Through IP Admission（1）, turbine low pressure cylinder
（2）, condenser（3）, condensate pump（4）, No.1 is low plus heater（5）, No. two low plus heaters（6）, No. three low plus heaters
（7）, No. four low plus heaters（8）, reducing-and-cooling plant（9）, water separator（10）With heat supply network heat exchanger（12）；Its feature
It is, the Steam Turbine Through IP Admission（1）Steam drain pass through communicating pipe（31）With turbine low pressure cylinder（2）Air intake connection,
The communicating pipe（31）It is upper that hydraulic pressure butterfly valve is housed（21）；The Steam Turbine Through IP Admission（1）Steam drain be also associated with cooling steam
Pipe（32）, No. three low plus extraction steam pipes（41）With heating extraction steam pipe（44）；The turbine low pressure cylinder（2）Steam drain and condenser
（3）Connection；The condenser（3）Cooling water side be connected with periodical feeding pipe（37）And recirculation return pipe（38）；Boiler feedwater
Pipe（43）Water inlet and condenser（3）Connection, the boiler feed pipe（43）Upper edge dampening flow direction is sequentially installed with solidifying
Bear water pump（4）, No.1 is low plus heater（5）, No. two low plus heaters（6）, No. three low plus heaters（7）Plus heating low with No. four
Device（8）；The No.1 is low to add heater（5）Add extraction steam pipe by the way that No.1 is low（39）With turbine low pressure cylinder（2）No.1 it is low plus
Extraction opening connects, and the No.1 is low to add extraction steam pipe（39）On the second gate valve is installed（29）；Described No. two low plus heaters（6）It is logical
Cross No. two low plus extraction steam pipes（40）With turbine low pressure cylinder（2）No. two low plus extraction opening connection, described No. two low plus extraction steam pipes
（40）On the first gate valve is installed（28）；Described No. three low plus heaters（7）Pass through No. three low plus extraction steam pipes（41）With steam turbine
Intermediate pressure cylinder（1）Steam drain connection；Described No. four low plus heaters（8）Pass through No. four low plus extraction steam pipes（42）It is pressed with steam turbine
Cylinder（1）No. four extraction openings connection；The heat supply network heat exchanger（12）Air intake pass through heating extraction steam pipe（44）With in steam turbine
Cylinder pressure（1）Steam drain connection, the heat supply network heat exchanger（12）Drain port pass through heating drain pipe（45）It is low with No. three to add
Hot device（7）Water inlet connection, the heat supply network heat exchanger（12）Water side be also associated with heat supply network return pipe（46）It supplies water with heat supply network
Pipe（47）；The cooling steam pipe（32）Air intake and Steam Turbine Through IP Admission（1）Steam drain connection, the cooling steam pipe
（32）Venthole and turbine low pressure cylinder（2）Air intake connection, the cooling steam pipe（32）On along the dynamic side of steam stream
To being sequentially installed with the first shut-off valve（22）, reducing-and-cooling plant（9）, water separator（10）, the first regulating valve（23）With
Second shut-off valve（24）.
2. the low pressure cylinder cooling system according to claim 1 based on different steam ports, which is characterized in that the carbonated drink
Separator（10）Venthole also pass through cooling steam branch pipe（34）With turbine low pressure cylinder（2）No.1 is low plus extraction opening connects
It connects, the cooling steam branch pipe（34）On be sequentially installed with third shut-off valve（25）, steam condenser（11）, the second regulating valve
（26）With the 4th shut-off valve（27）.
3. the low pressure cylinder cooling system according to claim 2 based on different steam ports, which is characterized in that the steam
Cooler（11）Cooling water side be connected with cooling water inlet pipe（35）With cooling water outlet pipe（36）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721783749.3U CN207813667U (en) | 2017-12-19 | 2017-12-19 | Low pressure cylinder cooling system based on different steam ports |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721783749.3U CN207813667U (en) | 2017-12-19 | 2017-12-19 | Low pressure cylinder cooling system based on different steam ports |
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| CN207813667U true CN207813667U (en) | 2018-09-04 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109441570A (en) * | 2018-11-05 | 2019-03-08 | 华电电力科学研究院有限公司 | One kind is coagulated in combination for two units takes out back heating system and operation method |
| CN110155296A (en) * | 2019-04-03 | 2019-08-23 | 中国船舶重工集团公司第七一九研究所 | Ocean nuclear power platform auxiliary steam converting system |
| CN110926049A (en) * | 2019-12-05 | 2020-03-27 | 陕西鼓风机（集团）有限公司 | Cogeneration low-temperature heating process and system |
| CN114704340A (en) * | 2022-05-06 | 2022-07-05 | 中国船舶重工集团公司第七0三研究所 | Double-low-pressure-cylinder zero-output steam turbine set regenerative system and operation method |
| CN115750014A (en) * | 2022-11-22 | 2023-03-07 | 东方电气集团东方汽轮机有限公司 | Deep peak regulation system of steam turbine set |
-
2017
- 2017-12-19 CN CN201721783749.3U patent/CN207813667U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109441570A (en) * | 2018-11-05 | 2019-03-08 | 华电电力科学研究院有限公司 | One kind is coagulated in combination for two units takes out back heating system and operation method |
| CN109441570B (en) * | 2018-11-05 | 2023-09-05 | 华电电力科学研究院有限公司 | Condensation back-pumping heat supply system for combination of two units and operation method |
| CN110155296A (en) * | 2019-04-03 | 2019-08-23 | 中国船舶重工集团公司第七一九研究所 | Ocean nuclear power platform auxiliary steam converting system |
| CN110926049A (en) * | 2019-12-05 | 2020-03-27 | 陕西鼓风机（集团）有限公司 | Cogeneration low-temperature heating process and system |
| CN110926049B (en) * | 2019-12-05 | 2023-11-21 | 陕西鼓风机（集团）有限公司 | Cogeneration low-temperature heating process and system |
| CN114704340A (en) * | 2022-05-06 | 2022-07-05 | 中国船舶重工集团公司第七0三研究所 | Double-low-pressure-cylinder zero-output steam turbine set regenerative system and operation method |
| CN114704340B (en) * | 2022-05-06 | 2023-12-08 | 中国船舶重工集团公司第七0三研究所 | Double-low-pressure cylinder zero-output steam turbine unit regenerative system and operation method |
| CN115750014A (en) * | 2022-11-22 | 2023-03-07 | 东方电气集团东方汽轮机有限公司 | Deep peak regulation system of steam turbine set |
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