CN211345276U - Constant volume sewage discharge system for power station - Google Patents

Constant volume sewage discharge system for power station Download PDF

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Publication number
CN211345276U
CN211345276U CN201922202608.3U CN201922202608U CN211345276U CN 211345276 U CN211345276 U CN 211345276U CN 201922202608 U CN201922202608 U CN 201922202608U CN 211345276 U CN211345276 U CN 211345276U
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flash tank
pipe
continuous
blowdown
pressure
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CN201922202608.3U
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黄淼
朱鹏超
陈瑞珠
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Huadianfu New Guangzhou Energy Co ltd
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Huadianfu New Guangzhou Energy Co ltd
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Abstract

The utility model provides a power station constant volume drainage, include: the device comprises a continuous-row flash tank and a fixed-row flash tank, wherein the continuous-row flash tank is connected with the fixed-row flash tank through a continuous-row flash tank blow-off pipe, a fixed-row flash tank blow-off main pipe is arranged at the bottom of the fixed-row flash tank, a high-pressure drum continuous blow-off branch pipe is arranged on a high-pressure drum continuous blow-off main pipe and is connected with the fixed-row flash tank, a medium-pressure drum continuous blow-off branch pipe is arranged on the medium-pressure drum continuous blow-off main pipe and is connected with the fixed-row flash tank, a continuous-row flash tank steam recovery pipe is arranged at the top of the continuous-row flash tank, a fixed-row flash tank steam recovery pipe is arranged at the top of the fixed-row flash tank, and the low-pressure drum continuous blow-off pipe, the high-pressure evaporator periodic discharge main pipe. The constant-volume blowdown system of the power station can effectively enhance the blowdown capacity and the energy recycling efficiency by combining the periodical blowdown flash tank and the continuous blowdown flash tank.

Description

Constant volume sewage discharge system for power station
Technical Field
The utility model relates to a drainage, concretely relates to power station constant volume drainage.
Background
The periodic sewage discharge capacity expander is mainly used for reducing the pressure and expanding the capacity of periodic sewage of a boiler, and the periodic sewage discharge water is subjected to secondary boiling under lower pressure to obtain part of secondary steam and simultaneously reduce the temperature of the sewage discharge water; the secondary steam and the sewage are separated in the periodic sewage discharging flash tank, the separated steam is discharged from an outlet at the upper part, and the sewage is discharged into the trench from a sewage port at the lower part.
The continuous blowdown expander is also called continuous blowdown expander, is connected with the continuous blowdown port of the boiler, is used for carrying out the continuous blowdown decompression and expansion of the boiler, and the blowdown water is separated into secondary steam and waste hot water in the continuous blowdown expander through adiabatic expansion, and is subjected to the expansion, decompression and heat exchange in the expander, then is discharged, and the secondary steam is led out by a special pipeline, and the waste hot water is automatically discharged through a floating ball liquid level valve or an overflow regulating valve, so that the heat energy can be recycled. The continuous sewage discharge amount is automatically adjusted along with the change of the boiler water supply load, and the relatively stable sewage discharge rate is kept.
The existing power plant generally adopts a periodic blowdown flash tank or a continuous blowdown flash tank to perform blowdown treatment, and the periodic blowdown flash tank or the continuous blowdown flash tank has certain advantages in blowdown, but how to realize maximum energy reuse and enhance blowdown capacity is still a technical problem to be solved in the field at present.
SUMMERY OF THE UTILITY MODEL
The utility model provides a power station constant volume blowdown system, through the antithetical couplet use of periodic blowdown flash vessel and continuous blowdown flash vessel, can effectively strengthen blowdown capacity and energy retrieval and utilization efficiency to prior art not enough.
In order to realize the technical scheme, the utility model provides a power station constant volume drainage, include: the continuous blowdown flash tank is connected with the fixed-row flash tank through a continuous blowdown flash tank blow-off pipe, a fifth electromagnetic valve is installed on the continuous blowdown flash tank blow-off pipe, a fixed-row flash tank blowdown header pipe is arranged at the bottom of the fixed-row flash tank, a tenth electromagnetic valve is installed on the fixed-row flash tank blowdown header pipe, a high-pressure drum continuous blowdown header pipe is connected with the continuous blowdown flash tank, a first electromagnetic valve is installed on the high-pressure drum continuous blowdown header pipe, a high-pressure drum continuous blowdown branch pipe is arranged on the high-pressure drum continuous blowdown header pipe, the high-pressure drum continuous blowdown branch pipe is connected with the fixed-row flash tank, a fourth electromagnetic valve is installed on the high-pressure drum continuous blowdown branch pipe, a medium-pressure drum continuous blowdown header pipe is connected with the continuous blowdown flash tank, a second electromagnetic valve is installed on the medium-pressure drum continuous blowdown header pipe, and a medium-pressure drum continuous blowdown header pipe is arranged on the medium-pressure drum continuous blowdown header pipe, the continuous blowdown of medium pressure boiler section of thick bamboo is in charge of and is connected with the flash tank of arranging surely, installs the third solenoid valve on the continuous blowdown of medium pressure boiler section of thick bamboo is in charge of, the top of arranging the flash tank is provided with even flash tank steam recovery pipe of arranging, even arrange flash tank steam recovery pipe and be connected with the low pressure boiler section of thick bamboo to even install the sixth solenoid valve on arranging the flash tank steam recovery pipe, the top of arranging the flash tank surely is provided with and arranges flash tank steam retrieval and utilization pipe surely, install the ninth solenoid valve on arranging the flash tank steam retrieval and utilization pipe surely, low pressure boiler section of thick bamboo continuous blowdown pipe, high pressure vaporizer periodic discharge mother pipe, medium pressure vaporizer periodic discharge mother pipe and low pressure vaporizer periodic discharge mother pipe are connected with the flash tank of arranging surely respectively.
In the technical scheme, when the system actually works, when the discharge capacity in the high-pressure boiler barrel continuous blowdown main pipe and the medium-pressure boiler barrel continuous blowdown main pipe is small, the first electromagnetic valve and the second electromagnetic valve are closed, the third electromagnetic valve and the fourth electromagnetic valve are opened, steam water in the high-pressure boiler barrel and the low-pressure boiler barrel respectively enters the fixed-discharge flash tank through the high-pressure boiler barrel continuous blowdown branch pipe and the medium-pressure boiler barrel continuous blowdown branch pipe, and is collected into the fixed-discharge flash tank together with the steam water discharged from the low-pressure boiler barrel continuous blowdown pipe, the high-pressure evaporator periodic discharge main pipe, the medium-pressure evaporator periodic discharge main pipe and the low-pressure evaporator periodic discharge main pipe, the collected steam water is subjected to steam-water separation through the fixed-discharge flash tank, the recycled steam is recycled through the fixed-discharge flash tank steam recycling pipe, and the sewage is discharged through the fixed-discharge flash tank blowdown main pipe at the bottom. When the sewage discharge amount in the high-pressure boiler barrel continuous sewage discharge main pipe and the medium-pressure boiler barrel continuous sewage discharge main pipe is larger, if all the sewage is discharged into the fixed-row flash tank for steam recovery, the steam recovery efficiency can be greatly reduced, at the moment, the third electromagnetic valve and the fourth electromagnetic valve are closed, the first electromagnetic valve and the second electromagnetic valve are opened, the steam and water in the high-pressure boiler barrel and the low-pressure boiler barrel respectively enter the continuous-row flash tank through the high-pressure boiler barrel continuous sewage discharge main pipe and the medium-pressure boiler barrel continuous sewage discharge main pipe, the steam and water discharged from the high-pressure boiler barrel and the medium-pressure boiler barrel are efficiently separated through the continuous-row flash tank, the separated steam is conveyed into the low-pressure boiler barrel through the continuous-row flash tank steam recovery pipe for recycling, the separated sewage is discharged into the fixed-row flash tank through the continuous-row flash tank sewage discharge pipe, the high-pressure evaporator periodic discharge main pipe, the medium-pressure evaporator periodic discharge main pipe and the low-pressure boiler barrel periodic discharge main pipe together with the In the discharge flash tank, steam-water separation is carried out on the collected steam-water again through the fixed-discharge flash tank, the steam obtained by recovery is recycled through a steam recycling pipe of the fixed-discharge flash tank, and the sewage is discharged through a sewage discharge header pipe of the fixed-discharge flash tank at the bottom. Through the combination of the periodical pollution discharge capacity expander and the continuous pollution discharge capacity expander, the pollution discharge can be adjusted according to the actual condition, and the pollution discharge capacity and the energy recycling efficiency can be effectively enhanced.
Preferably, a first pressure display sensor, a first pressure gauge and a first liquid level display gauge are installed on the continuous discharge flash tank, so that the pressure and the liquid level in the continuous discharge flash tank can be monitored in real time.
Preferably, a second pressure gauge and a second liquid level display gauge are installed on the fixed-displacement flash tank, so that the pressure and the liquid level in the fixed-displacement flash tank can be monitored in real time.
Preferably, the top of the continuous discharge flash tank is provided with a continuous discharge flash tank exhaust pipe, and the continuous discharge flash tank exhaust pipe is provided with an eighth solenoid valve.
Preferably, the high-pressure evaporator is provided with a check valve at a regular discharge main pipe, so that high-pressure steam is prevented from reversely flowing back to enter the high-pressure evaporator.
Preferably, be provided with on the flash tank steam recovery pipe of arranging in succession and discharge the branch pipe, discharge and install the seventh solenoid valve on the branch pipe, when the steam of retrieval and utilization does not reach the standard, can discharge through discharging the branch pipe.
Preferably, a cleaning pipe is installed in the fixed-row flash tank, so that the fixed-row flash tank can be backwashed conveniently.
The utility model provides a pair of power station constant volume drainage's beneficial effect lies in: the constant-volume blowdown system of the power station can carry out blowdown adjustment according to actual conditions by combining the periodic blowdown flash tank and the continuous blowdown flash tank, and can effectively enhance blowdown capacity and energy recycling efficiency.
Drawings
Fig. 1 is a schematic view of the structural connection of the present invention.
Fig. 2 is an enlarged schematic view i of a portion of the structure of fig. 1.
Fig. 3 is an enlarged schematic view ii of a part of the structure in fig. 1.
In the figure: 1. a connected flash tank; 2. a fixed-row flash tank; 3. a main pipe for continuously discharging sewage of the high-pressure boiler barrel; 4. a medium pressure boiler barrel continuous blowdown main pipe; 5. the high-pressure boiler barrel continuously discharges sewage and is divided into pipes; 6. the medium pressure boiler barrel continuously discharges sewage and is divided into pipes; 7. a continuous blow-off pipe of the low-pressure boiler barrel; 8. the high-pressure evaporator discharges a main pipe periodically; 9. the medium-pressure evaporator discharges a main pipe periodically; 10. the low-pressure evaporator discharges a main pipe periodically; 11. a blowdown header pipe of the fixed-row flash tank; 12. a blow-off pipe of the continuous discharge flash tank; 13. a continuous flash tank steam recovery pipe; 14. a fixed-discharge flash tank steam recycling pipe; 15. a first solenoid valve; 16. a second solenoid valve; 17. a third electromagnetic valve; 18. a fourth solenoid valve; 19. a fifth solenoid valve; 20. a sixth electromagnetic valve; 21. a seventh electromagnetic valve; 22. an eighth solenoid valve; 23. a continuous discharge flash tank exhaust pipe; 24. a ninth electromagnetic valve; 25. a first pressure display sensor; 26. a first pressure gauge; 27. a first liquid level display gauge; 28. a second pressure gauge; 29. a second liquid level display meter; 30. cleaning the tube; 31. a tenth solenoid valve; 32. a check valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by a person skilled in the art without any inventive step are within the scope of the present invention.
Example (b): a constant-volume sewage system for a power station.
Referring to fig. 1 to 3, a volumetric waste system for a power station includes: the continuous-drainage flash tank comprises a continuous-drainage flash tank 1 and a fixed-drainage flash tank 2, wherein the continuous-drainage flash tank 1 is connected with the fixed-drainage flash tank 2 through a continuous-drainage flash tank blow-off pipe 12, a fifth electromagnetic valve 19 is installed on the continuous-drainage flash tank blow-off pipe 12, a fixed-drainage flash tank blow-off main pipe 11 is arranged at the bottom of the fixed-drainage flash tank 2, a tenth electromagnetic valve 31 is installed on the fixed-drainage flash tank blow-off main pipe 11, a high-pressure drum continuous blow-off main pipe 3 is connected with the continuous-drainage flash tank 1, a first electromagnetic valve 15 is installed on the high-pressure drum continuous blow-off main pipe 3, a high-pressure drum continuous blow-off branch pipe 5 is arranged on the high-pressure drum continuous blow-off main pipe 3, the high-pressure drum continuous blow-off branch pipe 5 is connected with the fixed-drainage flash tank 2, a fourth electromagnetic valve 18 is installed on the high-pressure drum continuous blow-off branch pipe 5, a medium-pressure drum continuous blow, and be provided with the female pipe 6 of the continuous blowdown of middling pressure drum on the female pipe 4 of the continuous blowdown of middling pressure drum, the continuous blowdown of middling pressure drum is in charge of 6 and is connected with the flash tank 2 of surely arranging, installs third solenoid valve 17 on the continuous blowdown of middling pressure drum is in charge of 6, the top of the flash tank 1 of even arranging is provided with the flash tank steam recovery pipe 13 of even arranging, even arrange flash tank steam recovery pipe 13 and low-pressure drum and be connected to even arrange flash tank steam recovery pipe 13 and install sixth solenoid valve 20 on even arranging flash tank steam recovery pipe 13, the top of the flash tank 2 of surely arranging is provided with flash tank steam recovery pipe 14 of surely arranging, install ninth solenoid valve 24 on the flash tank steam recovery pipe 14 of surely arranging, the female pipe 8 of the continuous blowdown pipe 7 of low-pressure drum, high-pressure evaporator regular discharge, the female pipe 9 of the periodic discharge of middling pressure evaporator and the female pipe 10 of low-pressure evaporator regular discharge are. And a first pressure display sensor 25, a first pressure gauge 26 and a first liquid level display meter 27 are installed on the continuous discharge flash tank 1 so as to facilitate the real-time monitoring of the pressure and the liquid level in the continuous discharge flash tank 1. Install second manometer 28 and second liquid level display meter 29 on the flash tank 2 of surely arranging to in order to decide the real-time supervision of arranging flash tank 2 internal pressure and liquid level, and install scavenge pipe 30 in the flash tank 2 of surely arranging, be convenient for decide the back flush of flash tank 2 of arranging. Even arrange flash vessel 1 top and be provided with even row flash vessel blast pipe 23, even install eighth solenoid valve 22 on arranging flash vessel blast pipe 23 even, through setting up even row flash vessel blast pipe 23, be convenient for adjust even the steam pressure in arranging the flash vessel. Be provided with on the flash tank steam recovery pipe 13 of arranging in succession and discharge the branch pipe, discharge and install seventh solenoid valve 21 on the branch pipe, when the steam of retrieval and utilization does not reach the standard, can discharge through discharging the branch pipe. The high-pressure evaporator regular discharge main pipe 8 is provided with a check valve 32 to prevent high-pressure steam from reversely flowing back to enter the high-pressure evaporator.
The utility model discloses a work flow as follows:
when the sewage discharge amount in the high-pressure boiler barrel continuous sewage discharge main pipe 3 and the medium-pressure boiler barrel continuous sewage discharge main pipe 4 is small, the first electromagnetic valve 15 and the second electromagnetic valve 16 are closed, the third electromagnetic valve 17 and the fourth electromagnetic valve 18 are opened, steam water in the high-pressure boiler barrel and the low-pressure boiler barrel respectively enters the fixed-discharge flash tank 2 through the high-pressure boiler barrel continuous sewage discharge branch pipe 5 and the medium-pressure boiler barrel continuous sewage discharge branch pipe 6, and is collected into the fixed-discharge flash tank 2 together with steam water discharged from the low-pressure boiler barrel continuous sewage discharge pipe 7, the high-pressure evaporator periodic discharge main pipe 8, the medium-pressure evaporator periodic discharge main pipe 9 and the low-pressure evaporator periodic discharge main pipe 10, the collected steam water is subjected to steam-water separation through the fixed-discharge flash tank 2, the recycled steam is recycled through the fixed-discharge flash tank steam pipe 14, and sewage is discharged through the fixed-discharge flash tank sewage discharge main pipe 11 at the.
When the sewage discharge amount in the high-pressure boiler barrel continuous sewage discharge main pipe 3 and the medium-pressure boiler barrel continuous sewage discharge main pipe 4 is large, if all the sewage is discharged into the fixed-row flash tank 2 for steam recovery, the steam recovery efficiency can be greatly reduced, at the moment, the third electromagnetic valve 17 and the fourth electromagnetic valve 18 are closed, the first electromagnetic valve 15 and the second electromagnetic valve 16 are opened, the steam water in the high-pressure boiler barrel and the low-pressure boiler barrel respectively enters the continuous flash tank 1 through the high-pressure boiler barrel continuous sewage discharge main pipe 3 and the medium-pressure boiler barrel continuous sewage discharge main pipe 4, the steam water discharged from the high-pressure boiler barrel and the medium-pressure boiler barrel is efficiently separated through the continuous flash tank 1, the separated steam is conveyed into the low-pressure boiler barrel through the continuous flash tank steam recovery pipe 13 for recycling, the separated sewage is discharged into the fixed-row flash tank 2 through the continuous flash tank sewage discharge pipe 12 and is connected with the low-pressure boiler barrel continuous sewage discharge pipe 7, The high-pressure evaporator regular discharge main pipe 8, the medium-pressure evaporator regular discharge main pipe 9 and the low-pressure evaporator regular discharge main pipe 10 are collected into the fixed-discharge flash tank 2 together with steam water discharged from the fixed-discharge flash tank 2, the collected steam water is subjected to steam-water separation again through the fixed-discharge flash tank 2, the recycled steam is recycled through the fixed-discharge flash tank steam recycling pipe 14, and sewage is discharged through the fixed-discharge flash tank sewage discharge main pipe 11 at the bottom.
The constant-volume blowdown system of the power station can carry out blowdown adjustment according to actual conditions through the combined use of the constant-volume flash tank 2 and the continuous-discharge flash tank 1, and can effectively enhance the blowdown capacity and the energy recycling efficiency.
The above description is a preferred embodiment of the present invention, but the present invention should not be limited to the disclosure of the embodiment and the accompanying drawings, and therefore, all equivalents and modifications that can be accomplished without departing from the spirit of the present invention are within the protection scope of the present invention.

Claims (7)

1. A power station constant volume blowdown system, comprising: the continuous blowdown flash tank is connected with the fixed-row flash tank through a continuous blowdown flash tank blow-off pipe, a fifth electromagnetic valve is installed on the continuous blowdown flash tank blow-off pipe, a fixed-row flash tank blowdown header pipe is arranged at the bottom of the fixed-row flash tank, a tenth electromagnetic valve is installed on the fixed-row flash tank blowdown header pipe, a high-pressure drum continuous blowdown header pipe is connected with the continuous blowdown flash tank, a first electromagnetic valve is installed on the high-pressure drum continuous blowdown header pipe, a high-pressure drum continuous blowdown branch pipe is arranged on the high-pressure drum continuous blowdown header pipe, the high-pressure drum continuous blowdown branch pipe is connected with the fixed-row flash tank, a fourth electromagnetic valve is installed on the high-pressure drum continuous blowdown branch pipe, a medium-pressure drum continuous blowdown header pipe is connected with the continuous blowdown flash tank, a second electromagnetic valve is installed on the medium-pressure drum continuous blowdown header pipe, and a medium-pressure drum continuous blowdown header pipe is arranged on the medium-pressure drum continuous blowdown header pipe, the continuous blowdown of medium pressure boiler section of thick bamboo is in charge of and is connected with the flash tank of arranging surely, installs the third solenoid valve on the continuous blowdown of medium pressure boiler section of thick bamboo is in charge of, the top of arranging the flash tank is provided with even flash tank steam recovery pipe of arranging, even arrange flash tank steam recovery pipe and be connected with the low pressure boiler section of thick bamboo to even install the sixth solenoid valve on arranging the flash tank steam recovery pipe, the top of arranging the flash tank surely is provided with and arranges flash tank steam retrieval and utilization pipe surely, install the ninth solenoid valve on arranging the flash tank steam retrieval and utilization pipe surely, low pressure boiler section of thick bamboo continuous blowdown pipe, high pressure vaporizer periodic discharge mother pipe, medium pressure vaporizer periodic discharge mother pipe and low pressure vaporizer periodic discharge mother pipe are connected with the flash tank of arranging surely respectively.
2. The power station volumetric blowdown system of claim 1, wherein: and a first pressure display sensor, a first pressure gauge and a first liquid level display gauge are installed on the continuous-row flash tank.
3. The power station volumetric blowdown system of claim 1, wherein: and a second pressure gauge and a second liquid level display gauge are installed on the fixed-row flash tank.
4. The power station volumetric blowdown system of claim 1, wherein: the top of the continuous discharge flash tank is provided with a continuous discharge flash tank exhaust pipe, and an eighth electromagnetic valve is installed on the continuous discharge flash tank exhaust pipe.
5. The power station volumetric blowdown system of claim 1, wherein: the high-pressure evaporator regular discharge main pipe is provided with a check valve.
6. The power station volumetric blowdown system of claim 1, wherein: and a discharge branch pipe is arranged on the steam recovery pipe of the continuous discharge flash tank, and a seventh electromagnetic valve is installed on the discharge branch pipe.
7. The power station volumetric blowdown system of claim 1, wherein: and a cleaning pipe is arranged in the fixed-row flash tank.
CN201922202608.3U 2019-12-11 2019-12-11 Constant volume sewage discharge system for power station Active CN211345276U (en)

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Application Number Priority Date Filing Date Title
CN201922202608.3U CN211345276U (en) 2019-12-11 2019-12-11 Constant volume sewage discharge system for power station

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Application Number Priority Date Filing Date Title
CN201922202608.3U CN211345276U (en) 2019-12-11 2019-12-11 Constant volume sewage discharge system for power station

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112128731A (en) * 2020-09-30 2020-12-25 东方菱日锅炉有限公司 Blowdown steam recovery system of multi-pressure boiler

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112128731A (en) * 2020-09-30 2020-12-25 东方菱日锅炉有限公司 Blowdown steam recovery system of multi-pressure boiler

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CB03 Change of inventor or designer information

Inventor after: Lin Xiaoming

Inventor after: Zhu Junchao

Inventor after: Xu Feng

Inventor before: Huang Miao

Inventor before: Zhu Pengchao

Inventor before: Chen Ruizhu

CB03 Change of inventor or designer information