CN208687705U - A kind of system that excision low pressure (LP) cylinder is coupled into automotive row with low-pressure coal saver - Google Patents
A kind of system that excision low pressure (LP) cylinder is coupled into automotive row with low-pressure coal saver Download PDFInfo
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- CN208687705U CN208687705U CN201821235608.2U CN201821235608U CN208687705U CN 208687705 U CN208687705 U CN 208687705U CN 201821235608 U CN201821235608 U CN 201821235608U CN 208687705 U CN208687705 U CN 208687705U
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Abstract
The utility model discloses a kind of systems that excision low pressure (LP) cylinder is coupled into automotive row with low-pressure coal saver, including intermediate pressure cylinder, mesolow cross over pipe sealing valve, low pressure (LP) cylinder, low temperature heat supply network circulating water pipe, low-pressure coal saver, heat exchangers for district heating and heat supply network drainage pump；Mesolow cross over pipe sealing valve is located between intermediate pressure cylinder outlet and low pressure (LP) cylinder entrance；The outlet of intermediate pressure cylinder is also connected with heat exchangers for district heating shell-side inlet, and heat supply network drainage pump is set at heat exchangers for district heating shell-side outlet；Heat exchangers for district heating pipe side entrance is connected with low temperature heat supply network circulating water pipe；Low-pressure coal saver water side entrance and low temperature heat supply network circulating water pipe are got in touch with, and low-pressure coal saver outlet conduit and heat supply network drainage pump outlet conduit are got in touch with；Low-pressure coal saver flue gas side entrance is connected with air preheater outlet smoke discharging pipe.The utility model makes low-pressure economizer system that can recycle smoke discharging residual heat when unit cuts off low pressure (LP) cylinder into automotive row with bringing normally into operation, reduces exhaust gas temperature, improves Electric Scrubber Efficiency, improve the energy conservation and environmental protection index of unit.
Description
Technical field
The utility model relates to thermal power generating technology fields, and in particular to a kind of excision low pressure (LP) cylinder is saved into automotive row and low pressure
The system of coal device coupling.
Background technique
In recent years, excision low pressure (LP) cylinder is into vapour heat supply process, also known as " low pressure (LP) cylinder zero contribute technology ", numerous heat supply machines at home
It is widely applied in group.The technology is the important breakthrough to the steam turbine tradition method of operation, and heat supply period will portion big absolutely in winter
Former low pressure (LP) cylinder is divided to be used for heat supply into vapour, low pressure (LP) cylinder is through-flow minimum flow steam, raising unit heat capacity；If external heating load is not
In the case where change, unit generation power can be greatly reduced, realize depth peak regulation；Almost without cold source energy during unit heat supply,
Greatly reduce unit generation coal consumption.
Low-pressure economizer system, also known as " low-level (stack-gas) economizer system " and " flue gas waste heat recovery system " are current domestic thermoelectricitys
The power-saving technology that unit generally uses.By adding heat exchange on the flue between air preheater and electric precipitator
Device recycles the low pressure condensate water of boiler exhaust gas heat Steam Turbine Regenerative System, reduces the steam extraction amount of low-pressure heater, in turn
Increase steam turbine power output.Also, flue-gas temperature enters electric precipitator after reducing, volume flow is reduced, under fly ash resistivity is obvious
Drop, can be such that dust collection efficiency improves.
For thermal power plant unit in excision low pressure (LP) cylinder under vapour operating condition, most intermediate pressure cylinder steam discharges enter heat exchangers for district heating,
Then hydrophobic directly to import oxygen-eliminating device, low pressure (LP) cylinder only has a small amount of cooling steam to pass through, thus condenser duty very little, condensation
Water also very little.For being provided with the thermal power plant unit of low-pressure economizer system, if condensing capacity very little, low-pressure economizer system
It will be unable to bringing normally into operation, the energy conservation and environmental protection operation of unit and low-pressure coal saver service life adversely affected.
Utility model content
The utility model aim is to provide a kind of system that excision low pressure (LP) cylinder is coupled into automotive row with low-pressure coal saver, with
Overcome and cut off low pressure (LP) cylinder under vapour operating condition in unit, low-pressure economizer system can not bringing normally into operation defect.
In order to achieve the above objectives, the utility model is achieved using following technical scheme:
A kind of system that excision low pressure (LP) cylinder is coupled into automotive row with low-pressure coal saver, including intermediate pressure cylinder, mesolow cross over pipe
Sealing valve, low pressure (LP) cylinder, low temperature heat supply network circulating water pipe, low-pressure coal saver, heat exchangers for district heating and heat supply network drainage pump；
Mesolow cross over pipe sealing valve is located between intermediate pressure cylinder outlet and low pressure (LP) cylinder entrance；
The outlet of intermediate pressure cylinder is also connected with heat exchangers for district heating shell-side inlet, and heat supply network drainage pump is set to heat exchangers for district heating shell-side and goes out
At mouthful；Heat exchangers for district heating pipe side entrance is connected with low temperature heat supply network circulating water pipe；
Low-pressure coal saver water side entrance is got in touch with by the first contact pipeline and low temperature heat supply network circulating water pipe, and low-pressure coal saver goes out
Waterpipe is got in touch with by the second contact pipeline and heat exchangers for district heating outlet conduit；Low-pressure coal saver smoke inlet and air preheater
Smoke discharging pipe is exported to be connected.
Further, cooling steam system is also parallel between the outlet of intermediate pressure cylinder and the entrance of low pressure (LP) cylinder, low pressure (LP) cylinder goes out
Condenser is connected at mouthful.
Further, cooling steam system includes the cooling steam regulating valve being successively set on cooling steam pipeline and stream
Orifice.
Further, the first communicating door is equipped at low-pressure coal saver water side entrance, exit is equipped with the second communicating door.
Further, the outlet conduit of low-pressure coal saver is connected to water inlet pipe by the pipeline for being equipped with third communicating door.
Further, heat supply network drainage pump water outlet connects oxygen-eliminating device.
Further, booster pump is additionally provided at low-pressure coal saver water side entrance.
Further, low-pressure coal saver exhanst gas outlet connects electric precipitator inlet flue gas pipeline.
Compared with prior art, the utility model has the following beneficial effects:
The system that the excision low pressure (LP) cylinder of the utility model is coupled into automotive row with low-pressure coal saver has the beneficial effect that,
Heat supply period cuts off mesolow cylinder communicating pipe into vapour, and newly-increased bypass duct is passed through a small amount of cooling steam, for taking away excision low pressure
Air blast heat of the cylinder into low pressure rotor rotation generation after vapour；In addition, former low pressure (LP) cylinder is used for heat supply into vapour, unit is improved for thermal energy
Power；In the case where heating load is constant, unit generation power can be reduced to a certain degree, realize depth peak regulation；And unit heat supply period
Between almost without cold source energy, greatly reduce unit generation coal consumption.The system can be realized thermal power plant unit in steam extraction and condensing formula
The flexible switching of the method for operation and the high back pressure method of operation.On the other hand, it shunts part Low Temperature Thermal net recirculated water and enters low pressure province
Coal device, returns to high temperature heat supply network circulating water pipe for heat supply after heating, cut off low pressure (LP) cylinder under vapour operating condition in unit, guarantee low
The bringing normally into operation of economizer system is pressed, smoke discharging residual heat is recycled, reduces exhaust gas temperature, Electric Scrubber Efficiency is improved, improves unit
Energy conservation and environmental protection index.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model.
Wherein, 1- intermediate pressure cylinder steam inlet pipe road；2- intermediate pressure cylinder；3- mesolow cylinder communicating pipe；4- cooling steam pipeline；5- is cooling
Steam control valve；6- flow-through orifice；7- mesolow communicating pipe sealing valve；8- low pressure (LP) cylinder；9- exhaust equipment of LP casing road；10- condensing
Device；11- low temperature heat supply network circulating water pipe；The first communicating door of 12-；13- first gets in touch with pipeline；14- low-pressure coal saver entrance water pipe；
15- third communicating door；16- booster pump；17- low-pressure coal saver exports water pipe；18- electric precipitator inlet flue gas pipeline；19- low pressure
Economizer；20- air preheater outlet smoke discharging pipe；21- heat exchangers for district heating；23- high temperature heat supply network circulating water pipe；22- heat supply network is dredged
Water pump；24- oxygen-eliminating device；The second communicating door of 25-；26- second gets in touch with pipeline；27- heat supply extraction line.
Specific embodiment
Utility model is described in further detail with reference to the accompanying drawing.
Referring to Fig. 1, the excision low pressure (LP) cylinder of the utility model into the system that automotive row is coupled with low-pressure coal saver include middle pressure
Cylinder 2, low pressure (LP) cylinder 8, mesolow cylinder communicating pipe 3, mesolow cross over pipe sealing valve 7, exhaust equipment of LP casing road 9, condenser 10, deoxygenation
Device 24, heat exchangers for district heating 21, low-pressure coal saver 19, the first communicating door 12, the second communicating door 25 and third communicating door 15；Intermediate pressure cylinder
2 and low pressure (LP) cylinder 8 pass through mesolow cylinder communicating pipe 3 connect；Mesolow cross over pipe sealing valve 7 was arranged on mesolow communicating pipe 3；In
It is parallel with cooling steam system, including cooling steam pipeline 4 low pressure communicating pipe 3, and is arranged on cooling steam pipeline 4
Cooling steam regulating valve 5 and flow-through orifice 6；Heat exchangers for district heating 21 is in parallel with low-pressure coal saver 19, and 21 pipe side of heat exchangers for district heating enters
Mouth connection low temperature heat supply network circulating water pipe 11, and pass through the first contact pipeline 12 and the contact of low-pressure coal saver entrance water pipe 14, heat supply network
21 pipe side outlet of heater connects high temperature heat supply network circulating water pipe 23, and goes out saliva by the second contact pipeline 26 and low-pressure coal saver
Pipe 17 is got in touch with；First contact pipeline 12 is equipped with the first communicating door 12, and the second contact pipeline 26 is equipped with the second communicating door 25, low
It presses economizer entrance water pipe 14 and low-pressure coal saver outlet water pipe 17 to get in touch with, and is equipped with third communicating door 15, low-pressure coal saver enters
Booster pump 16 is additionally provided on saliva pipe 14；Intermediate pressure cylinder 2 is connected with 21 shell-side inlet of heat exchangers for district heating by heat supply extraction line 27,
21 shell-side outlet of heat exchangers for district heating is connected with 22 entrance of heat supply network drainage pump, and the outlet of heat supply network drainage pump 22 is connected with oxygen-eliminating device 24；It is low
19 flue gas side entrance of economizer is pressed to connect air preheater outlet smoke discharging pipe 20,19 flue gas side outlet of low-pressure coal saver connection electricity
Deduster inlet flue gas pipeline 18.
When using excision low pressure (LP) cylinder steam admission mode operation, former low pressure (LP) cylinder enters heat exchangers for district heating heating heat supply network circulation into vapour
Water, then hydrophobic to import oxygen-eliminating device through heat supply network drainage pump, only a small amount of cooling steam enters low pressure (LP) cylinder heel row to condenser, thus
Condensing capacity is seldom.For being provided with the thermal power plant unit of low-pressure economizer system, the contact of heat supply network recirculated water and condensed water is opened
Door shunts (about 50~60 DEG C) of part Low Temperature Thermal net recirculated water and enters low-pressure coal saver, high temperature heat supply network recirculated water is returned to after heating
Pipe, and the communicating door of low-pressure coal saver inlet and outlet water pipe is opened, shunt the high-temperature water of a small amount of low-pressure coal saver water side outlet (about
100~110 DEG C) low-pressure coal saver entrance adjusting water temperature is imported to 70 DEG C or more, to avoid the low temperature corruption of low-pressure coal saver heat exchanger tube
Erosion.Low pressure (LP) cylinder is cut off into the bringing normally into operation of low-pressure economizer system under vapour operating condition, is guaranteed in unit, recycles smoke discharging residual heat,
Exhaust gas temperature is reduced, Electric Scrubber Efficiency is improved, improves the energy conservation and environmental protection index of unit.
The course of work of the utility model:
This system supplies 2 steam of intermediate pressure cylinder by intermediate pressure cylinder steam inlet pipe road 1, and 2 steam discharge of intermediate pressure cylinder passes through mesolow cylinder communicating pipe 3
Supply low pressure (LP) cylinder 8.
Heat supply period closes mesolow communicating pipe sealing valve 7 and cuts off mesolow cylinder communicating pipe 3 into vapour, passes through cooling steam pipeline
4 are passed through a small amount of cooling steam, for taking away excision low pressure (LP) cylinder 8 into the air blast heat that low pressure rotor rotation generates after vapour, and lead to
Cooling steam regulating valve 5 and flow-through orifice 6 the control cooling steam flow being arranged on supercooling jet chimney 4.
When using excision low pressure (LP) cylinder steam admission mode operation, overwhelming majority original low pressure (LP) cylinder 8 passes through heat supply extraction line 27 into vapour
Heat supply network recirculated water is heated into heat exchangers for district heating 21, the hydrophobic of subsequent heat exchangers for district heating 21 imports oxygen-eliminating device through heat supply network drainage pump 22
24, only a small amount of cooling steam, which enters after low pressure (LP) cylinder 8, drains into condenser 10 by exhaust equipment of LP casing road 9, thus condensing capacity is very
It is few；For being provided with the thermal power plant unit of 19 system of low-pressure coal saver, 12 He of the first communicating door on the first contact pipeline 13 is opened
The second communicating door 25 on second contact pipeline 26, by low temperature heat supply network circulating water pipe 11 and low-pressure coal saver entrance water pipe 13
Network, high temperature heat supply network circulating water pipe 23 and low-pressure coal saver outlet water pipe 17 are got in touch with, and the low temperature heat supply network for shunting 50~60 DEG C of part follows
Ring water imports high temperature heat supply network circulating water pipe 23 into after the heat exchange of the high-temperature flue gas of low-level (stack-gas) economizer 19 and smoke discharging pipe；It opens low
The third communicating door 15 of pressure economizer inlet and outlet water pipe, the high-temperature water that shunting part low-pressure coal saver 19 flows out, about 100~110
DEG C, 19 water side entrance booster pump of low-pressure coal saver, 16 upstream position is imported, adjusts 19 water side entrance water temperature of low-pressure coal saver to 70
DEG C or more, it can be avoided low-pressure coal saver heat exchanger tube low-temperature corrosion.This system can use excision low pressure (LP) cylinder into vapour side in unit
When formula is run, guarantee the bringing normally into operation of low-pressure economizer system, recycle smoke discharging residual heat, reduce exhaust gas temperature, improves electric precipitator
Efficiency improves the energy conservation and environmental protection index of unit.
The above content is only to illustrate the technical idea of the utility model, and the protection model of the utility model cannot be limited with this
Enclose, it is all according to the utility model proposes technical idea, any changes made on the basis of the technical scheme each falls within this reality
Within protection scope with novel claims.
Claims (8)
1. a kind of system for being coupled into automotive row with low-pressure coal saver of excision low pressure (LP) cylinder, which is characterized in that including intermediate pressure cylinder (2),
Mesolow cross over pipe sealing valve (7), low pressure (LP) cylinder (8), low temperature heat supply network circulating water pipe (11), low-pressure coal saver (19), heat supply network heating
Device (21) and heat supply network drainage pump (22)；
Mesolow cross over pipe sealing valve (7) is located between intermediate pressure cylinder (2) outlet and low pressure (LP) cylinder (8) entrance；
The outlet of intermediate pressure cylinder (2) is also connected with heat exchangers for district heating (21) shell-side inlet, and heat supply network drainage pump (22) is heated set on heat supply network
At device (21) shell-side outlet；Heat exchangers for district heating (21) pipe side entrance is connected with low temperature heat supply network circulating water pipe (11)；
Low-pressure coal saver (19) water side entrance is got in touch with by the first contact pipeline (13) and low temperature heat supply network circulating water pipe (11), low pressure
Economizer (19) outlet conduit is got in touch with by the second contact pipeline (26) and heat exchangers for district heating (21) outlet conduit；Low-pressure coal saver
(19) smoke inlet is connected with air preheater outlet smoke discharging pipe (20).
2. a kind of system that excision low pressure (LP) cylinder is coupled into automotive row with low-pressure coal saver according to claim 1, feature
It is, cooling steam system, low pressure (LP) cylinder (8) exit is also parallel between the outlet of intermediate pressure cylinder (2) and the entrance of low pressure (LP) cylinder (8)
It connects condenser (10).
3. a kind of system that excision low pressure (LP) cylinder is coupled into automotive row with low-pressure coal saver according to claim 2, feature
It is, cooling steam system includes cooling steam regulating valve (5) and the flow-through orifice being successively set on cooling steam pipeline (4)
(6)。
4. a kind of system that excision low pressure (LP) cylinder is coupled into automotive row with low-pressure coal saver according to claim 1, feature
It is, be equipped with the first communicating door (12) at low-pressure coal saver (19) water side entrance, exit is equipped with the second communicating door (25).
5. a kind of system that excision low pressure (LP) cylinder is coupled into automotive row with low-pressure coal saver according to claim 1, feature
It is, the outlet conduit of low-pressure coal saver (19) is connected to water inlet pipe by the pipeline for being equipped with third communicating door (15).
6. a kind of system that excision low pressure (LP) cylinder is coupled into automotive row with low-pressure coal saver according to claim 1, feature
It is, heat supply network drainage pump (22) water outlet connects oxygen-eliminating device (24).
7. a kind of system that excision low pressure (LP) cylinder is coupled into automotive row with low-pressure coal saver according to claim 1, feature
It is, is additionally provided with booster pump (16) at low-pressure coal saver (19) water side entrance.
8. a kind of system that excision low pressure (LP) cylinder is coupled into automotive row with low-pressure coal saver according to claim 1, feature
It is, low-pressure coal saver (19) exhanst gas outlet connects electric precipitator inlet flue gas pipeline (18).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821235608.2U CN208687705U (en) | 2018-08-01 | 2018-08-01 | A kind of system that excision low pressure (LP) cylinder is coupled into automotive row with low-pressure coal saver |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821235608.2U CN208687705U (en) | 2018-08-01 | 2018-08-01 | A kind of system that excision low pressure (LP) cylinder is coupled into automotive row with low-pressure coal saver |
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| CN208687705U true CN208687705U (en) | 2019-04-02 |
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| CN201821235608.2U Active CN208687705U (en) | 2018-08-01 | 2018-08-01 | A kind of system that excision low pressure (LP) cylinder is coupled into automotive row with low-pressure coal saver |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110864343A (en) * | 2019-12-13 | 2020-03-06 | 华能国际电力股份有限公司 | Low-pressure cylinder zero-output heat supply system of circulating fluidized bed unit |
| CN110872959A (en) * | 2019-12-13 | 2020-03-10 | 华能国际电力股份有限公司 | Low-pressure economizer and low-pressure cylinder zero-output heat supply coupling system |
| CN114001348A (en) * | 2021-11-24 | 2022-02-01 | 三河发电有限责任公司 | Thermodynamic system |
-
2018
- 2018-08-01 CN CN201821235608.2U patent/CN208687705U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110864343A (en) * | 2019-12-13 | 2020-03-06 | 华能国际电力股份有限公司 | Low-pressure cylinder zero-output heat supply system of circulating fluidized bed unit |
| CN110872959A (en) * | 2019-12-13 | 2020-03-10 | 华能国际电力股份有限公司 | Low-pressure economizer and low-pressure cylinder zero-output heat supply coupling system |
| CN114001348A (en) * | 2021-11-24 | 2022-02-01 | 三河发电有限责任公司 | Thermodynamic system |
| CN114001348B (en) * | 2021-11-24 | 2023-08-25 | 三河发电有限责任公司 | Thermodynamic system |
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