CN214198624U - Steam turbine system based on preposed feed water heater - Google Patents

Steam turbine system based on preposed feed water heater Download PDF

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Publication number
CN214198624U
CN214198624U CN202022232845.7U CN202022232845U CN214198624U CN 214198624 U CN214198624 U CN 214198624U CN 202022232845 U CN202022232845 U CN 202022232845U CN 214198624 U CN214198624 U CN 214198624U
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China
Prior art keywords
heater
drainage
door
electric door
communicated
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CN202022232845.7U
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Chinese (zh)
Inventor
马海涛
任贵猛
辛志远
滕玉辉
梁文华
徐成成
王宗凯
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Inner Mongolia Jinlian Aluminium Co ltd
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Inner Mongolia Jinlian Aluminium Co ltd
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Abstract

The utility model discloses a steam turbine system based on leading feedwater heater, including leading heater, come the pneumatic door, the electric door before the heater, electric door behind the heater, heater bypass door, feedwater import three-way valve, feedwater import bypass door, a hydrophobic entry hand-operated gate, a hydrophobic entry electric door, No. two hydrophobic entry hand-operated gates, No. two hydrophobic entry electric doors, a hydrophobic pump, No. two hydrophobic pumps, a hydrophobic export check valve, No. two hydrophobic export check valves, a hydrophobic export electric door, No. two hydrophobic export electric doors, hydrophobic export total check valve, hydrophobic pump sealing water gate, a sealing water valve and No. two sealing water valve. The utility model relates to a steam turbine auxiliary engine technical field specifically is to provide a practice thrift when starting the demineralized water yield, reducing the boiler start-up incomplete combustion heat loss of fuel, improved the turbine system based on leading feedwater heater of unit thermal efficiency.

Description

Steam turbine system based on preposed feed water heater
Technical Field
The utility model relates to a steam turbine auxiliary engine technical field specifically indicates a steam turbine system based on leading feedwater heater.
Background
In order to improve the economy and safety of the unit, protect the environment and respond to the national call for energy conservation and emission reduction, at present, most of domestic thermal power generating units are technically improved. The high-pressure heater is a device for heating the feed water by using partial extraction of the steam turbine. As a heat conversion device, the heat conversion device is mainly applied to a heat recovery system of a large thermal power generating unit, the heat transfer performance of the heat conversion device directly affects the economy and safety of the unit, the existing leakage phenomenon of a high-pressure heater exists, the high-pressure heating system can be recovered to operate after the high-pressure heater leaks for 3-5 days generally, the high-pressure heater splitting not only increases the power generation and supply cost, but also induces the possibility of pipe explosion of a boiler due to the fact that the heating surface of the boiler is over-heated, so that the high-pressure heater safe and stable operation not only has great influence on the economic index of the unit, and also brings great test on the safe and stable operation of the unit.
SUMMERY OF THE UTILITY MODEL
In order to solve the existing problem, the utility model provides a practice thrift when starting the demineralized water yield, reducing the boiler and starting incomplete combustion heat loss of fuel, improved the turbine system based on leading feedwater heater of unit thermal efficiency.
The utility model adopts the following technical scheme: the utility model relates to a steam turbine system based on leading feedwater heater, including leading heater, come pneumatic operated gate, heater front electric gate, electric gate behind the heater, heater bypass gate, feedwater import three-way valve, feedwater import bypass gate, a hydrophobic entry hand-operated gate, a hydrophobic entry electric gate, No. two hydrophobic entry hand-operated gates, No. two hydrophobic entry electric gates, a drainage pump, No. two drainage pumps, a hydrophobic export check valve, No. two hydrophobic export check valves, a hydrophobic export electric gate, No. two hydrophobic export electric gates, the total check valve of hydrophobic export, the sealed water gate of drainage pump, a sealed water valve and No. two sealed water valve, come pneumatic operated gate one end and auxiliary steam header intercommunication, come pneumatic operated gate other end and leading heater shell one end intercommunication, the leading heater shell other end divide into two respectively with a hydrophobic entry hand-operated gate one end, a hydrophobic export sealed water valve, One end of a second drainage inlet manual door is communicated, the other end of the first drainage inlet manual door is communicated with one end of a first drainage inlet electric door, the other end of the second drainage inlet manual door is communicated with one end of a second drainage inlet electric door, the other end of the first drainage inlet electric door is communicated with one end of a first drainage pump, the other end of the second drainage inlet electric door is communicated with one end of a second drainage pump, the other end of the first drainage pump is communicated with one end of a first drainage outlet check valve, the other end of the second drainage pump is communicated with one end of a second drainage outlet check valve, the other end of the first drainage outlet check valve is communicated with one end of a first drainage outlet electric door, the other end of the second drainage outlet check valve is communicated with one end of a second drainage outlet electric door, the other end of the first drainage outlet electric door and the other end of the second drainage outlet electric door are combined into a whole and communicated with one end of a drainage outlet total check valve, the drain export total check valve other end is linked together with the oxygen-eliminating device, the three mouth of feedwater import three-way valve is linked together with feed pump, boiler feedwater operation platform and leading heater respectively, feedwater import by-pass gate one end is linked together with the feed pump, the feedwater import by-pass gate other end divide into two and is linked together with heater by-pass gate one end and heater preceding electric door one end respectively, the electric door other end is linked together with leading heater pipe layer one end before the heater, electric door one end is linked together behind leading heater pipe layer other end and the heater, the electric door other end is linked together with high pressure feed water heater behind the heater, the heater by-pass gate other end is linked together with high pressure feed water heater.
Furthermore, one end of the drain pump sealing water gate is communicated with sealing water, the other end of the drain pump sealing water gate is divided into two paths to be communicated with one end of a first sealing water valve and one end of a second sealing water valve, the other end of the first sealing water valve is communicated with the sealing piece of the first drain pump, and the other end of the second sealing water valve is communicated with the sealing piece of the second drain pump, so that the drain pump can be sealed and cooled, the operation of the drain pump is more stable and safer, and the efficiency is higher.
Further, the pre-heater is a dividing wall type heat exchanger, so that auxiliary steam can be separated from feed water.
Furthermore, five liquid level protection switches of low I, normal, high I, high II and high III are arranged on the liquid level in the front heater, so that abnormal conditions can be reported to the police in time and linkage protection actions can be performed, and the whole equipment can operate safely and stably.
Adopt above-mentioned structure the utility model discloses the beneficial effect who gains as follows: this scheme a steam turbine system based on leading feedwater heater, the trap operation is more high-efficient, assists vapour and water separation, and whole equipment safety and stability moves, practices thrift and starts the demineralized water volume, and the incomplete combustion heat loss of fuel when reducing the boiler and starting.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a steam turbine system based on a front feedwater heater according to the present invention;
fig. 2 is a schematic structural view of a water supply system of a steam turbine system based on a front feed water heater, which is added with a front heater.
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.
The device comprises a front heater, a front air inlet electric valve, a front heater electric valve, a rear heater electric valve, a heater bypass valve, a water supply inlet three-way valve, a water supply inlet bypass valve, a water inlet manual valve, a first water inlet electric valve, a second water inlet manual valve, a water inlet electric valve, a water outlet manual valve.
A, B, C, D, E in FIG. 1 refers to the combination of media and direction, wherein A refers to auxiliary steam coming, B refers to water coming, C refers to high pressure heater going, D refers to oxygen remover, and E refers to sealing water.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the 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; based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1-2, the utility model relates to a steam turbine system based on a front feed water heater, which comprises a front heater 1, an air inlet electric valve 2, a front heater electric valve 3, a rear heater electric valve 4, a heater bypass valve 5, a feed water inlet three-way valve 6, a feed water inlet bypass valve 7, a first drainage inlet hand valve 8, a first drainage inlet electric valve 9, a second drainage inlet hand valve 10, a second drainage inlet electric valve 11, a first drainage pump 12, a second drainage pump 13, a first drainage outlet check valve 14, a second drainage outlet check valve 15, a first drainage outlet electric valve 16, a second drainage outlet electric valve 17, a drainage outlet main check valve 18, a drainage pump sealing water valve 19, a first sealing water valve 20 and a second sealing water valve 21, wherein one end of the air inlet electric valve 2 is communicated with an auxiliary steam header, the other end of the air inlet electric valve 2 is communicated with one end of a shell layer of the front heater 1, the other end of the shell layer of the front heater 1 is divided into two parts which are respectively communicated with one end of a first drainage inlet manual door 8 and one end of a second drainage inlet manual door 10, the other end of the first drainage inlet manual door 8 is communicated with one end of a first drainage inlet electric door 9, the other end of the second drainage inlet manual door 10 is communicated with one end of a second drainage inlet electric door 11, the other end of the first drainage inlet electric door 9 is communicated with one end of a first drainage pump 12, the other end of the second drainage inlet electric door 11 is communicated with one end of a second drainage pump 13, the other end of the first drainage pump 12 is communicated with one end of a first drainage outlet check valve 14, the other end of the second drainage pump 13 is communicated with one end of a second drainage outlet check valve 15, the other end of the first drainage outlet check valve 14 is communicated with one end of a first drainage outlet electric door 16, the other end of the second drainage outlet check valve 15 is communicated with one end of a second drainage outlet electric door 17, the other end of the first drainage outlet electric door 16 and the other end of the second drainage outlet electric door 17 are combined into one and communicated with one end of a drainage outlet total check valve 18, the other end of the drainage outlet total check valve 18 is communicated with a deaerator, three ports of the water supply inlet three-way valve 6 are respectively communicated with a water supply pump, a boiler water supply operation platform and a preposed heater 1, one end of the water supply inlet bypass door 7 is communicated with the water supply pump, the other end of the water supply inlet bypass door 7 is divided into two ports which are respectively communicated with one end of a heater bypass door 5 and one end of a heater front electric door 3, the other end of the heater front electric door 3 is communicated with one end of a preposed heater 1 pipe layer, the other end of the preposed heater 1 pipe layer is communicated with one end of a heater rear electric door 4, and the other end of the heater rear electric door 4 is communicated with a high-pressure heater, the other end of the heater bypass door 5 is communicated with the high-pressure heater.
Wherein, the 19 one end of drain pump sealed water gate is linked together with sealed water, the 19 other end of drain pump sealed water gate divide into two tunnel and a sealed water gate 20 one end and No. two sealed water gate 21 one ends and is linked together, a sealed water gate 20 other end is linked together with the sealing member department of a drain pump 12, No. two sealed water gate 21 other ends are linked together with the sealing member department of No. two drain pumps 13, leading heater 1 is the dividing wall type heat exchanger, the liquid level is equipped with low I, normally, high I in leading heater 1, high II, high five liquid level protection switches of height III.
During specific use, during normal operation (the drainage pump is used for one and switched regularly, and the standby working condition of the drainage pump 13 for operating the drainage pump 12 for one) the states of each valve and equipment are as follows: the device comprises an incoming pneumatic electric door 2, a front electric door 3, a rear electric door 4, a bypass door 5, a water supply inlet three-way valve 6, a water supply inlet bypass door 7, a first drainage inlet manual door 8, a first drainage inlet electric door 9, a second drainage inlet manual door 10, a second drainage inlet electric door 11, a first drainage pump 12, a second drainage pump 13, a first drainage outlet electric door 16, a second drainage outlet electric door 17, a drainage sealing water door, a first sealing water door and a second sealing water door. The feed water enters the pipe layer of the preposed heater 1 through the feed water inlet three-way valve 6 and the electric door 3 in front of the heater, auxiliary steam flows to the shell layer of the preposed heater 1 through the incoming gas electric door 2 and heats the feed water, the heated feed water flows to the high-pressure heater through the electric door 4 behind the heater, the enthalpy of the auxiliary steam after heating the feed water is reduced and condensed into drain water, the drain water flows to the first drain pump 12 through the first drain inlet manual door 8 and the first drain inlet electric door 9 and is pressurized through the first drain pump 12, the pressurized drain water flows to the deaerator through the first drain outlet check valve 14, the first drain outlet electric door 16 and the drain outlet total check valve 18, and the sealing water flows to the sealing part of the first drain pump 12 through the drain pump sealing water door 19 and the first sealing water door 20.
The present invention and the embodiments thereof have been described above, but the description is not limited thereto, and the embodiment shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should understand that they should not be limited to the embodiments described above, and that they can design the similar structure and embodiments without departing from the spirit of the invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Claims (4)

1. A steam turbine system based on a front feedwater heater, characterized in that: the device comprises a pre-heater, an air inlet electric door, a heater front electric door, a heater rear electric door, a heater bypass door, a water supply inlet three-way valve, a water supply inlet bypass door, a first drainage inlet manual door, a first drainage inlet electric door, a second drainage inlet manual door, a second drainage inlet electric door, a first drainage pump, a second drainage pump, a first drainage outlet check valve, a second drainage outlet check valve, a first drainage outlet electric door, a second drainage outlet electric door, a drainage outlet main check valve, a drainage pump sealing water door, a first sealing water valve and a second sealing water valve, wherein one end of the air inlet electric door is communicated with an auxiliary steam header, the other end of the air inlet electric door is communicated with one end of a pre-heater shell, the other end of the heater shell is divided into two branches which are respectively communicated with one end of the first drainage inlet manual door and one end of the second drainage inlet manual door, the other end of the first drainage inlet manual door is communicated with one end of a first drainage inlet electric door, the other end of a second drainage inlet manual door is communicated with one end of a second drainage inlet electric door, the other end of the first drainage inlet electric door is communicated with one end of a first drainage pump, the other end of the second drainage inlet electric door is communicated with one end of a second drainage pump, the other end of the first drainage pump is communicated with one end of a first drainage outlet check valve, the other end of the second drainage pump is communicated with one end of a second drainage outlet check valve, the other end of the first drainage outlet check valve is communicated with one end of a first drainage outlet electric door, the other end of the second drainage outlet check valve is communicated with one end of a second drainage outlet electric door, the other end of the first drainage outlet electric door and the other end of the second drainage outlet electric door are combined into one and communicated with one end of a drainage outlet main check valve, the drain export total check valve other end is linked together with the oxygen-eliminating device, the three mouth of feedwater import three-way valve is linked together with feed pump, boiler feedwater operation platform and leading heater respectively, feedwater import by-pass gate one end is linked together with the feed pump, the feedwater import by-pass gate other end divide into two and is linked together with heater by-pass gate one end and heater preceding electric door one end respectively, the electric door other end is linked together with leading heater pipe layer one end before the heater, electric door one end is linked together behind leading heater pipe layer other end and the heater, the electric door other end is linked together with high pressure feed water heater behind the heater, the heater by-pass gate other end is linked together with high pressure feed water heater.
2. The turbine system according to claim 1, wherein: the water drain pump is characterized in that one end of the water drain pump sealing water gate is communicated with sealing water, the other end of the water drain pump sealing water gate is divided into two paths to be communicated with one end of a first sealing water valve and one end of a second sealing water valve, the other end of the first sealing water valve is communicated with a sealing piece of a water drain pump, and the other end of the second sealing water valve is communicated with a sealing piece of a second water drain pump.
3. The turbine system according to claim 1, wherein: the pre-heater is a dividing wall type heat exchanger.
4. The turbine system according to claim 1, wherein: the liquid level in the front heater is provided with five liquid level protection switches of low I, normal, high I, high II and high III.
CN202022232845.7U 2020-10-09 2020-10-09 Steam turbine system based on preposed feed water heater Active CN214198624U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202022232845.7U CN214198624U (en) 2020-10-09 2020-10-09 Steam turbine system based on preposed feed water heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202022232845.7U CN214198624U (en) 2020-10-09 2020-10-09 Steam turbine system based on preposed feed water heater

Publications (1)

Publication Number Publication Date
CN214198624U true CN214198624U (en) 2021-09-14

Family

ID=77641677

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202022232845.7U Active CN214198624U (en) 2020-10-09 2020-10-09 Steam turbine system based on preposed feed water heater

Country Status (1)

Country Link
CN (1) CN214198624U (en)

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