CN203702271U - Device for lowering exhaust steam temperature of steam turbine - Google Patents
Device for lowering exhaust steam temperature of steam turbine Download PDFInfo
- Publication number
- CN203702271U CN203702271U CN201320888644.XU CN201320888644U CN203702271U CN 203702271 U CN203702271 U CN 203702271U CN 201320888644 U CN201320888644 U CN 201320888644U CN 203702271 U CN203702271 U CN 203702271U
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- spraying
- pump
- injection spray
- pipeline
- spray pipe
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Abstract
The utility model provides a device for lowering the exhaust steam temperature of a steam turbine. The device comprises a water-feed-pump steam turbine condenser, wherein a condensing pump is arranged on the outlet pipeline of the water-feed-pump steam turbine condenser; the outlet pipeline of the condensing pump is divided into two branch circuits by a tee; the first branch circuit is communicated with the hot water well of the steam exhaust device of the steam turbine; the second branch circuit is communicated with a spray system arranged in the steam exhaust device of the steam turbine. The device provided by the utility model is capable of adequately using the low-temperature condensed water of the water-feed-pump steam turbine condenser for cooling the exhaust steam of the steam turbine; the volume of the device is sharply reduced during the exhaust steam condensing process, the back pressure of the steam turbine is lowered, the vacuum degree of a unit is increased, and the amount of steam exhausted in an air-cooling condenser is reduced, thus the exhaust steam is much adequately condensed in the air-cooling condenser, and the load of a vacuum pump is correspondingly reduced, so as to achieve the comprehensive benefit of energy conservation.
Description
Technical field
The utility model belongs to power station field of energy-saving technology, relates to a kind of device that reduces turbine discharge temperature.
Background technique
Use in the process of steam turbine power generation in power plant, because the back pressure of Direct Air-cooled Unit (main frame) is comparatively violent with the variation performance of ambient temperature, especially in the summer high temperature period, unit back pressure raises with ambient temperature, and air cooling condenser film-cooled heat, air cooling blower fan go out wind-force and limit by equipment performance, therefore unit economy is poor.
The supporting small turbine of feed water pump (hereinafter to be referred as little machine) is pure condensing turbine, the variation of ambient temperature is not obvious on little machine back pressure impact, only relevant with circulating water temperature and flow, so the back pressure of little machine is lower, exhaust temperature is also corresponding lower, and little machine condensing water temperature maintains in 40 ℃ substantially.Unit is in the time of normal operation, and little machine water of condensation enters large machine Condenser's Hot Well by bypass, is not utilized.
Model utility content
The purpose of this utility model is to provide one can reduce turbine discharge temperature, reduces unit back pressure, reaches the device of energy-conservation object reduction turbine discharge temperature.
To achieve these goals, the technological scheme that the utility model adopts is: comprise feed pump turbine vapour condenser, the export pipeline of feed pump turbine vapour condenser is provided with the pump that condenses, the delivery side of pump pipeline that condenses is divided into two branch roads by threeway, wherein Article 1 branch road is connected with the hot well of steam turbine venting gas appliance, and Article 2 branch road is connected with the spraying system being arranged in turbine discharge device.
Described spraying system comprises the first spraying device and the second spraying device, the first spraying device and the second spraying device are arranged on the throat below of turbine discharge device, and the first spraying device and the second spraying device include spraying piping and be arranged on the nozzle that injection spray pipe is fastened.
The spraying piping of the first described spraying device and the spraying piping of the second spraying device are by some injection spray pipe compositions parallel with one another, and the injection spray pipe cross arrangement of the injection spray pipe of the first spraying device and the second spraying device, is provided with some nozzles on every injection spray pipe.
Line-spacing between described adjacent two injection spray pipes is 800～1000mm, and on every injection spray pipe, the spacing of adjacent two nozzles is 800～1000mm, and the spray angle of nozzle is 60～70 °, and total number of nozzle is 36～48, and total radical of injection spray pipe is 4～8.
Every injection spray pipe in described spraying system is all positioned on the different heights of turbine discharge device, and line-spacing between adjacent two injection spray pipes equates, on every injection spray pipe, the spacing of adjacent two nozzles equates.
The external diameter of the injection spray pipe in the first described spraying device is 100～108mm, and the thickness of pipe is 3～4mm; The external diameter of the injection spray pipe in the second spraying device is 70～76mm, and the thickness of pipe is 3～4mm.
On described Article 2 branch road, be provided with the stop valve for opening and closing spraying system, the inlet pipe of stop valve is connected with threeway, and the outlet conduit of stop valve is connected with spraying system.
On the outlet conduit of described stop valve, be provided with the first pipeline and the second pipeline in parallel, the spraying piping of the first pipeline and the first spraying device is connected, the spraying piping of the second pipeline and the second spraying device is connected, and on the second pipeline, is provided with the electric gate valve of controlling the second spraying device opening and closing.
Between described water pump turbine condenser and threeway, be provided with two pipelines in parallel, wherein a pipeline is provided with the pump that condenses, and another pipeline is provided with the pump co-controlling water that condenses to the frequency conversion of the water of condensation water level in mercury vapour turbine condenser and the flow pump that condenses.
The pipeline of described threeway ingress is provided with the branch road being connected with water circulator;
In parallelly on described Article 1 branch road be provided with main road and bypass, main road is provided with valve and floss hole, and bypass is provided with valve, and the Article 1 branch road of steam turbine venting gas appliance ingress is provided with floss hole for subsequent use.
Compared with prior art, the beneficial effects of the utility model are:
The utility model provides a kind of device that reduces turbine discharge temperature, on the export pipeline of feed pump turbine vapour condenser, be provided with the pump that condenses, the delivery side of pump pipeline that condenses is divided into two branch roads by threeway, wherein Article 1 branch road is connected with the hot well of steam turbine venting gas appliance, and Article 2 branch road is connected with the spraying system being arranged in turbine discharge device.Therefore the water of condensation in feed pump turbine vapour condenser is divided into two-way by the conveying of the pump that condenses after threeway, one tunnel enters the hot well of steam turbine venting gas appliance, the spraying system of separately leading up in turbine discharge device is sprayed at turbine discharge device inside, make the part water of condensation in feed pump turbine vapour condenser to enter turbine discharge device in the mode of spraying, make full use of the cryogenic temperature condensation water cooling turbine discharge in feed pump turbine vapour condenser, can reduce turbine discharge temperature, in steam discharge condensation process, the volume of steam discharge sharply dwindles simultaneously, turbine back pressure decreases, the degree of vacuum of unit improves, the steam flow that simultaneously enters air cooling coagulator reduces, steam discharge is condensed more fully in air cooling heat radiator, corresponding reduction vacuum pump load, reach energy-conservation comprehensive benefit.
Further, the utility model is provided with two cover spraying devices, and the injection spray pipe of spraying device is arranged in parallel on different heights, the line-spacings such as the injection spray pipe intersection of two cover spraying devices are arranged, every injection spray pipe equal intervals be provided with nozzle, make like this water of condensation spraying of low temperature more even, and turbine discharge heat exchange is more abundant, reduce the temperature of turbine discharge, turbine back pressure is decreased.
Further, in the utility model, on Article 2 branch road, stop valve is installed, for cutting off spraying system when the spraying system fault, is discharged water of condensation by Article 1 branch road.
Further, in the utility model, on the second pipeline, be provided with electric gate valve, in the time that condensing capacity is lower, can cut off the second spraying device water inlet, guarantee the stability of system.
Further, the utility model is arranged in parallel the frequency conversion pump that condenses condensing on pump, can regulate the condense electric machine frequency of pump of frequency conversion according to the water of condensation water level in feed pump turbine vapour condenser, realizes the automatic adjusting of water of condensation water level and flow.
Further, in the utility model, on the pipeline of threeway ingress, be provided with the branch road being connected with water circulator, can make water of condensation enter water circulator and circulate, economic environmental protection.
Further, in parallelly on Article 1 branch road in the utility model be provided with main road and bypass, main road is provided with valve and floss hole, and the Article 1 branch road of steam turbine venting gas appliance ingress is provided with floss hole for subsequent use.Therefore water of condensation can be entered the hot well of steam turbine venting gas appliance or be discharged by floss hole by main road, in the time that main road breaks down, can be bypassed to the hot well of steam turbine venting gas appliance or discharge or enter from floss hole for subsequent use by bypass, having guaranteed the Security of system.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Wherein, 1 is feed pump turbine vapour condenser, and 2 is the pump that condenses, and 3 is the frequency conversion pump that condenses, and 4 is stop valve, and 5 is electric gate valve, and 6 is bypass, and 7 is the first spraying device, and 8 is the second spraying device, and 9 is turbine discharge device, and 10 is branch road.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further.
Referring to Fig. 1, the utility model comprises feed pump turbine vapour condenser 1, the export pipeline of feed pump turbine vapour condenser 1 is provided with two pipelines in parallel, wherein a pipeline is provided with the pump 2 that condenses, and another pipeline is provided with and the frequency conversion of condense water of condensation water level in pump 2 co-controlling feed pump turbine vapour condenser 1 and the flow pump 3 that condenses.Condense pump 2 and frequency conversion condensed after the export pipeline of pump 3 converges and is divided into two branch roads by threeway again, wherein Article 1 branch road is connected with the hot well of steam turbine venting gas appliance 9, and Article 1 in parallelly on branch road be provided with main road and bypass 6, main road is provided with valve and floss hole, bypass 6 is provided with valve, and the Article 1 branch road of steam turbine venting gas appliance 9 ingress is provided with floss hole for subsequent use.On Article 2 branch road, be provided with the stop valve 4 for opening and closing spraying system, on the outlet conduit of stop valve 4, be provided with the first pipeline and the second pipeline in parallel, the first pipeline is connected with the spraying piping of the first spraying device 7 that is arranged on the interior throat of turbine discharge device 9 below, the second pipeline is connected with the spraying piping of the second spraying device 8 that is arranged on the interior throat of turbine discharge device 9 below, and on the second pipeline, is provided with the electric gate valve 5 that control the second spraying device 8 opens and closes.Pipeline after the converging of threeway ingress is provided with the branch road 10 being connected with water circulator.The first spraying device 7 and the second spraying device 8 include spraying piping and are arranged on the nozzle that injection spray pipe is fastened, the spraying piping of the spraying piping of the first spraying device 7 and the second spraying device 8 is by some injection spray pipe compositions parallel with one another, and the injection spray pipe cross arrangement of the injection spray pipe of the first spraying device and the second spraying device, is provided with some nozzles on every injection spray pipe.Line-spacing between adjacent two injection spray pipes is 800～1000mm, and on every injection spray pipe, the spacing of adjacent two nozzles is 800～1000mm, and the spray angle of nozzle is 60～70 °, and total number of nozzle is 36～48, and total radical of injection spray pipe is 4～8.Every injection spray pipe is all positioned on the different heights of turbine discharge device 9, and line-spacing between adjacent two injection spray pipes equates, on every injection spray pipe, the spacing of adjacent two nozzles equates.The external diameter of the injection spray pipe in the first spraying device 7 is 100～108mm, and the thickness of pipe is 3～4mm; The external diameter of the injection spray pipe in the second spraying device 8 is 70～76mm, and the thickness of pipe is 3～4mm.
Referring to Fig. 1, specific works process of the present utility model is: open stop valve 4 and electric gate valve 5, close the valve in main road and bypass 6, make water of condensation in feed pump turbine vapour condenser 1 condense after the water level of pump 3 and Flow-rate adjustment and enter the first spraying device 7 and the second spraying device 8 through condense pump 2 and frequency conversion, by spraying piping and be arranged on nozzle that injection spray pipe fastens by water of condensation atomized spray in turbine discharge device 9, the steam turbine high-temperature steam discharge in cooling steam turbine venting gas appliance 9; In the time of low-load, condensing capacity is lower, now closes electric gate valve 5, cuts off the water inlet of the second spraying device 8, only carries out atomization water of condensation with the first spraying device 7.In the time of spraying system fault, utilize stop valve 4 to close spraying system, connect main road, cut off spraying system, water of condensation can be discharged by main road, enter in the hot well of turbine condenser venting gas appliance; In the time that main road breaks down, enable bypass.Can also make water of condensation enter water circulator by branch road 10.
Operational Limits of the present utility model:
Turbine low pressure cylinder exhaust temperature: 50-69 ℃ (summer)
Turbine discharge amount: 1000t/h
Feed water pump small turbine condensing water temperature: 30-40 ℃ (summer)
Feed water pump small turbine condensing water flow: design discharge 80t/h
Feed water pump small turbine condensing water flow: 600MW power down-off 50t/h
Feed water pump small turbine condensing water flow: 330MW power down-off 26-28t/h
Concrete part of the present utility model is selected:
(1) nozzle selection:
Inlet pressure: 0.05～0.1Mpa, flow: 1t/h.
(2) condense pump select:
Model KCZ65/250 pattern centrifugal pump
Lift 21m seal form filler
Rated flow 55m
3/ h rotating speed 1450rpm
(3) frequency conversion condense pump select:
The frequency conversion pump that condenses adopts the ACS550-01-031A-4 type of ABB AB, and scope is 0～48Hz.
The device of the reduction turbine discharge temperature that the utility model provides, by water of condensation lower temperature being caused to the throat below of turbine discharge device, utilize nozzle to carry out atomization, enter after turbine discharge device in the lower water of condensation of temperature, cooling turbine discharge, reduce turbine discharge temperature, reduce because condensing of steam discharge makes unit back pressure, there is significant energy-saving effect.
Energy-saving effect: the water of condensation of feed pump turbine vapour condenser is sprayed and entered turbine discharge device for continuous 24 hours, reduce 0.5kPa by back pressure, the every reduction of back pressure 1kPa can reduce coal consumption 1g/kWh, and annual electricity generating capacity is by 3,000,000,000 kWh, and year hours run calculated by 5000 hours:
1) within 1 year, can save mark coal: 1500 tons, bidding coal unit price is by 800 yuan/ton, and 1 year cost capable of saving fuel is: ten thousand yuan of 1500 × 800=120.
2) because unit back pressure reduces, the a large amount of steam discharges of unit condense through water of condensation spraying, the steam flow that enters air cooling heat radiator from turbine discharge device reduces, air cooling power consumption reduces, as calculated by reducing by 0.01%, the electric weight of saving per hour is: 4500kW × 0.01%=0.45kW, and a year save power is: 0.45 × 5000=2250kW, every degree electricity is by 0.32 yuan of calculating, and income that can save power is: 2250 × 0.32=720 unit.
Claims (10)
1. one kind is reduced the device of turbine discharge temperature, it is characterized in that: comprise feed pump turbine vapour condenser (1), the export pipeline of feed pump turbine vapour condenser (1) is provided with the pump that condenses (2), the export pipeline of pump (2) of condensing is divided into two branch roads by threeway, wherein Article 1 branch road is connected with the hot well of steam turbine venting gas appliance (9), and Article 2 branch road is connected with the spraying system being arranged in turbine discharge device (9).
2. the device of reduction turbine discharge temperature according to claim 1, it is characterized in that: described spraying system comprises the first spraying device (7) and the second spraying device (8), the first spraying device (7) and the second spraying device (8) are arranged on the throat below of turbine discharge device (9), and the first spraying device (7) and the second spraying device (8) include spraying piping and be arranged on the nozzle that injection spray pipe is fastened.
3. the device of reduction turbine discharge temperature according to claim 2, it is characterized in that: the spraying piping of described the first spraying device (7) and the spraying piping of the second spraying device (8) are by some injection spray pipe compositions parallel with one another, and the injection spray pipe cross arrangement of the injection spray pipe of the first spraying device and the second spraying device, is provided with some nozzles on every injection spray pipe.
4. the device of reduction turbine discharge temperature according to claim 3, it is characterized in that: the line-spacing between adjacent two injection spray pipes is 800～1000mm, on every injection spray pipe, the spacing of adjacent two nozzles is 800～1000mm, the spray angle of nozzle is 60～70 °, total number of nozzle is 36～48, and total radical of injection spray pipe is 4～8.
5. according to the device of the reduction turbine discharge temperature described in claim 3 or 4, it is characterized in that: every injection spray pipe in described spraying system is all positioned on the different heights of turbine discharge device (9), and the line-spacing between adjacent two injection spray pipes is equal, and on every injection spray pipe, the spacing of adjacent two nozzles equates.
6. according to the device of the reduction turbine discharge temperature described in claim 3 or 4, it is characterized in that: the external diameter of the injection spray pipe in described the first spraying device (7) is 100～108mm, and the thickness of pipe is 3～4mm; The external diameter of the injection spray pipe in the second spraying device (8) is 70～76mm, and the thickness of pipe is 3～4mm.
7. according to the device of the reduction turbine discharge temperature described in any one in claim 2-4, it is characterized in that: on described Article 2 branch road, be provided with the stop valve (4) for opening and closing spraying system, the inlet pipe of stop valve (4) is connected with threeway, and the outlet conduit of stop valve (4) is connected with spraying system.
8. the device of reduction turbine discharge temperature according to claim 7, it is characterized in that: on the outlet conduit of described stop valve (4), be provided with the first pipeline and the second pipeline in parallel, the spraying piping of the first pipeline and the first spraying device (7) is connected, the spraying piping of the second pipeline and the second spraying device (8) is connected, and on the second pipeline, is provided with the electric gate valve (5) of controlling the second spraying device (8) opening and closing.
9. according to the device of the reduction turbine discharge temperature described in any one in claim 1-4, it is characterized in that: between described water pump turbine condenser (1) and threeway, be provided with two pipelines in parallel, wherein a pipeline is provided with the pump that condenses (2), another pipeline be provided with the pump that condenses (2) co-controlling feed pump turbine vapour condenser (1) in water of condensation water level and the frequency conversion of the flow pump (3) that condenses.
10. the device of reduction turbine discharge temperature according to claim 9, is characterized in that: the pipeline of described threeway ingress is provided with the branch road (10) being connected with water circulator;
In parallelly on described Article 1 branch road be provided with main road and bypass (6), main road is provided with valve and floss hole, bypass (6) is provided with valve, and the Article 1 branch road of steam turbine venting gas appliance (9) ingress is provided with floss hole for subsequent use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320888644.XU CN203702271U (en) | 2013-12-31 | 2013-12-31 | Device for lowering exhaust steam temperature of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320888644.XU CN203702271U (en) | 2013-12-31 | 2013-12-31 | Device for lowering exhaust steam temperature of steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203702271U true CN203702271U (en) | 2014-07-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320888644.XU Expired - Fee Related CN203702271U (en) | 2013-12-31 | 2013-12-31 | Device for lowering exhaust steam temperature of steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203702271U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107035439A (en) * | 2017-06-27 | 2017-08-11 | 中国船舶重工集团公司第七�三研究所 | A kind of condensing turbine exhaust casing cooling system |
| CN108661728A (en) * | 2017-03-28 | 2018-10-16 | 新疆知信科技有限公司 | Steam exhaust device of steam turbine is atomized control method and equipment |
| CN110953922A (en) * | 2019-11-27 | 2020-04-03 | 河北涿州京源热电有限责任公司 | Minimum circulating water flow regulating and controlling method of indirect air cooling system based on minimum antifreezing allowable backpressure |
| CN111120021A (en) * | 2019-12-20 | 2020-05-08 | 东方电气集团东方汽轮机有限公司 | Water charging system for condenser of heat supply unit |
-
2013
- 2013-12-31 CN CN201320888644.XU patent/CN203702271U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108661728A (en) * | 2017-03-28 | 2018-10-16 | 新疆知信科技有限公司 | Steam exhaust device of steam turbine is atomized control method and equipment |
| CN107035439A (en) * | 2017-06-27 | 2017-08-11 | 中国船舶重工集团公司第七�三研究所 | A kind of condensing turbine exhaust casing cooling system |
| CN107035439B (en) * | 2017-06-27 | 2023-09-12 | 中国船舶重工集团公司第七�三研究所 | Rear cylinder cooling system of condensing steam turbine |
| CN110953922A (en) * | 2019-11-27 | 2020-04-03 | 河北涿州京源热电有限责任公司 | Minimum circulating water flow regulating and controlling method of indirect air cooling system based on minimum antifreezing allowable backpressure |
| CN111120021A (en) * | 2019-12-20 | 2020-05-08 | 东方电气集团东方汽轮机有限公司 | Water charging system for condenser of heat supply unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 Termination date: 20141231 |
|
| EXPY | Termination of patent right or utility model |