CN204648398U - A kind of heat-exchange system of 350MW high back pressure thermal power plant unit - Google Patents
A kind of heat-exchange system of 350MW high back pressure thermal power plant unit Download PDFInfo
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- CN204648398U CN204648398U CN201520313889.9U CN201520313889U CN204648398U CN 204648398 U CN204648398 U CN 204648398U CN 201520313889 U CN201520313889 U CN 201520313889U CN 204648398 U CN204648398 U CN 204648398U
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Abstract
The utility model discloses a kind of heat-exchange system of 350MW high back pressure thermal power plant unit, belong to steam power plant field, comprise gland seal system, condensate system, closed Water System, the condensate water inlet channel being provided with No. two valves is connected with gland heater, gland heater is connected with the condensate water outlet conduit being provided with No. three valves, and the pipeline by being provided with a valve between condensate water inlet channel and condensate water outlet conduit is connected; Pipeline between closed-up water heat exchanger and subsidiary engine cooling device is provided with No. six valves; Closed-up water heat exchanger is connected with condensate water inlet channel by the pipeline being provided with No. five valves, and subsidiary engine cooling device is connected with condensate water outlet conduit by the pipeline being provided with No. eight valves.The utility model can be different according to 350MW high back pressure thermal power plant unit running status, the type of cooling of adjustment gland heater, coordinates the heat exchange of unit inside, such that the energy consumption of unit reduces, operational efficiency raising; And regulative mode is flexible, cost is lower.
Description
Technical field
The utility model relates to a kind of heat-exchange system of high back pressure thermal power plant unit, and especially a kind of heat-exchange system of 350MW high back pressure thermal power plant unit, belongs to steam power plant field.
Background technology
The proposition required along with energy-saving and emission-reduction and the theory of environmental protection are strengthened day by day, cogeneration of heat and power, and utilizing high back pressure recirculated water to supply municipal heating systems will become a development trend in thermal power plant.High back pressure circulating water heating technology is successfully applied, improves reliability of heat-supply system and heat capacity, economy, environmental protection, and social benefit is remarkable.
In high back pressure steam turbine with external atmospheric pressure not etc., in cylinder, steam or cylinder outer air spill along radial clearance between main shaft and cylinder or bleed, cause medium-loss, worsen running environment, all packing is housed at rotor through cylinder both sides place for this reason, this packing is called axle side packing, is called for short shaft seal.
Gland heater is again shaft sealing cooler, gland steam heater, is used for extracting the leakage vapour of steam turbine gland system out, prevents steam from draining to steam turbine building and oil system from sidepiece shaft seal and goes and contaminated environment and destruction oil.Shaft-packing leakage is vapour gas mixture, and entering gland heater, to be cooled into water hydrophobic to condenser.
In conventional High Back Pressure Steam Turbine Units heating system, gland heater adopts condensate water to cool, condensate water enters the gland heater being provided with heat exchanger plate by condensing water conduit, while condensate water cooling shaft-packing leakage, gland heater heats condensate water, the heat exchange of unit inside can improve the operational efficiency of unit, reduces units consumption simultaneously.When non-heating period operating mode is run, the temperature of condensate water enough cools gland heater.But when Heating Period operating mode is run, due to the rising of the operation back pressure of High Back Pressure Steam Turbine Units, the water temperature of condensate water is caused to increase substantially, warmly take the cooling needs that too high condensate water can not meet gland heater, the recovery of shaft-packing leakage can not be reclaimed in time, to the problem that shaft-packing leakage can not reclaim in time, common solution is the gland heater that the new area of replacing one is larger, or increases a gland heater; The method setting up or change gland heater is difficult to reach economical and practical, the requirement of efficient energy-saving.
Utility model content
The utility model technical issues that need to address are to provide a kind of heat-exchange system of 350MW high back pressure thermal power plant unit, running status that can be different according to 350MW high back pressure thermal power plant unit, the type of cooling of adjustment gland heater, coordinate the heat exchange of unit inside, such that the energy consumption of unit reduces, operational efficiency raising; And regulative mode is flexible, cost is lower.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is:
A kind of heat-exchange system of 350MW high back pressure thermal power plant unit, comprise gland seal system, condensate system, closed Water System, closed Water System comprises the closed-up water heat exchanger be communicated with by piping loop, subsidiary engine cooling device, enclosed water pump, gland seal system comprises gland heater, the condensate water inlet channel of condensate system is connected with gland heater respectively with condensate water outlet conduit, condensate water inlet channel is provided with No. two valves, condensate water outlet conduit is provided with No. three valves, pipeline by being provided with a valve between the condensate water outlet conduit of the condensate water inlet channel of No. two valve influent sides and No. three valve water outlet sides is connected, be communicated with on the pipeline between closed-up water heat exchanger water outlet side and subsidiary engine cooling device influent side and be provided with No. six valves, the water outlet side of closed-up water heat exchanger is connected by the water outlet side condensate water inlet channel of the pipeline with No. two valves that are provided with No. five valves, and the influent side of subsidiary engine cooling device is connected by the influent side condensate water outlet conduit of the pipeline with No. three valves that are provided with No. eight valves, No. five valves are arranged between the water outlet side of No. two valves and the influent side of No. six valves, and No. eight valves are arranged between the influent side of No. three valves and the water outlet side of No. six valves.
The further improvement of technical solutions of the utility model is: the pipeline between the closed-up water heat exchanger of closed Water System and subsidiary engine cooling device is also provided with No. seven valves, and described No. eight valves are arranged between the water outlet side of No. seven valves and the influent side of No. three valves.
Owing to have employed technique scheme, the technological progress that the utility model obtains is:
A kind of heat-exchange system of 350MW high back pressure thermal power plant unit, the type of cooling of the gland heater of gland seal system can according to the running status of 350MW high back pressure thermal power plant unit, cool flexible conversion between two kinds of types of cooling in condensate system cooling and closed Water System, such that the energy consumption of unit reduces, operational efficiency raising; And regulative mode is flexible, cost is lower.
At non-heating season, gland heater is cooled by the condensate water in condensate system; No. five valves, No. eight valves, valve closings, No. two valves, No. three valve opens.Condensate water in gland heater, carries out heat exchange by the shaft-packing leakage in heat exchanger plates and gland heater, the temperature reduction condensation of shaft-packing leakage by condensate water inlet channel in gland heater, hydrophobic to condenser; Condensing water temperature simultaneously in condensing water conduit raises.
And during the operation of Heating Period operating mode, due to the rising of back pressure, the condensate water water temperature in 350MW high back pressure thermal power plant unit condensate system is higher, is about 78 DEG C, can not shaft-packing leakage in effective cooling gland heater, easily cause shaft-packing leakage to reclaim not in time, not up to standard.At Heating Season, the utility model adopts closed Water System cooling gland heater, wherein No. two valves, No. three valve closings, and a valve open, makes condensate water without gland heater; No. six valve closings, No. five valves, No. eight valve opens, the cooling water of closed Water System carries out heat exchange through gland heater and shaft-packing leakage, gland heater is cooled by the closed-up water of closed-up water heat exchanger exit, cool complete closed-up water water temperature and raise about 1 DEG C, and then go to cool other subsidiary engine equipment, finally get back to closed-up water heat exchanger and form a closed cycle.Adopt this kind of switched system design, not only runing adjustment is more flexible, can also solve and add the inadequate problem of area because back pressure raises the axle brought, save investment to a certain extent.
Pipeline between closed-up water heat exchanger and subsidiary engine cooling device is longer, and setting up of No. seven valves makes the circulation of closed-up water not exclusively rely on No. six valves, and the shutoff between closed-up water heat exchanger and subsidiary engine cooling device is more timely.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Wherein, 1, valve, 2, No. two valves, 3, No. three valves, 4, No. four valves, 5, No. five valves, 6, No. six valves, 7, No. seven valves, 8, No. eight valves, 9, gland heater, 10, closed-up water heat exchanger, 11, subsidiary engine cooling device, 12, enclosed water pump.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further details:
A heat-exchange system for 350MW high back pressure thermal power plant unit, as shown in Figure 1, comprises gland seal system, condensate system, closed Water System; Wherein, closed Water System comprises the closed-up water heat exchanger 10, subsidiary engine cooling device 11, the enclosed water pump 12 that are communicated with by piping loop, enclosed water pump 12 provides the circulation power of closed Water System, closed-up water heat exchanger 10 provides cooling water to enter subsidiary engine cooling device 11 and cools subsidiary engine equipment, finally gets back to closed-up water heat exchanger 10 and forms a closed cycle.
Condensate system comprises condensate water inlet channel, condensate water outlet pipe, condenser, condensate water inlet channel is connected with the gland heater 9 of gland seal system, condensate water enters gland heater 9 by condensate water inlet channel, gland heater 9 is connected with condensate water outlet conduit, condensate water after heat exchange, enters condensate water outlet conduit in gland heater 9; Condensate water inlet channel is provided with No. two valves 2, condensate water outlet conduit is provided with No. three valves 3, pipeline by being provided with a valve 1 between the condensate water inlet channel of No. two valve 2 influent sides and the condensate water outlet conduit of No. three valve 3 water outlet sides is connected, under ensureing No. two valves 2, No. three valve 3 closed conditions, open a valve 1, condensate water can not pass through gland heater 9, again enters condensate water circulation from the pipeline being provided with a valve 1.
Pipeline between the water outlet side of the closed-up water heat exchanger 10 of closed Water System and the influent side of subsidiary engine cooling device 11 is provided with No. six valves 6.The water outlet side of closed-up water heat exchanger 10 is connected by the water outlet side condensate water inlet channel of the pipeline with No. two valves 2 that are provided with No. five valves 5, the influent side of subsidiary engine cooling device 11 is connected by the influent side condensate water outlet conduit of the pipeline with No. three valves 3 that are provided with No. eight valves 8, wherein, No. five valves 5 are arranged between the water outlet side of No. two valves 2 and the influent side of No. six valves 6, and No. eight valves 8 are arranged between the influent side of No. three valves 3 and the water outlet side of No. six valves 6; To ensure at closedown No. five valves 5, No. eight valves 8, when opening No. six valves 6, closed-up water is not by gland heater 9; Close at No. six valves 6, under No. five valves 5, No. eight states that valve 8 is opened, closed-up water is through gland heater 9, heat exchange is carried out with shaft-packing leakage in gland heater 9, cool complete closed-up water water temperature and raise about 1 DEG C, and then go to cool other subsidiary engine equipment, finally get back to closed-up water heat exchanger and form a closed cycle.
Pipeline between the closed-up water heat exchanger 10 of closed Water System and subsidiary engine cooling device 11 is also provided with No. seven valves 7, No. eight valves 8 are arranged between the influent side of No. three valves 3 and the water outlet side of No. seven valves 7, setting up of No. seven valves 7 makes the circulation of closed-up water not exclusively rely on No. six valves 6, and the shutoff between closed-up water heat exchanger 10 and subsidiary engine cooling device 11 is more timely.
During non-heating period, 5, No. eight valves 8 of No. five valves in closed Water System are closed, and No. six valves 6, No. seven valves 7 are opened, closed-up water by-passing; 2, No. three valves 3 of No. two valves in condensate system are opened, and a valve 1 is closed, and gland heater 9 is cooled by condensate system.During Heating Period, 5, No. eight valves 8 of No. five valves in closed Water System are opened, 6, No. seven valve 7 open and close of No. six valves; 2, No. three valves 3 of No. two valves in condensate system are closed, and a valve 1 is opened, condensate water by-passing, and gland heater 9 is cooled by closed Water System.
Claims (2)
1. the heat-exchange system of a 350MW high back pressure thermal power plant unit, comprise gland seal system, condensate system, closed Water System, closed Water System comprises the closed-up water heat exchanger (10) be communicated with by piping loop, subsidiary engine cooling device (11), enclosed water pump (12), gland seal system comprises gland heater (9), it is characterized in that: the condensate water inlet channel of condensate system is connected with gland heater (9) respectively with condensate water outlet conduit, condensate water inlet channel is provided with No. two valves (2), condensate water outlet conduit is provided with No. three valves (3), pipeline by being provided with a valve (1) between the condensate water inlet channel of No. two valve (2) influent sides and the condensate water outlet conduit of No. three valve (3) water outlet sides is connected, be communicated with on the pipeline between closed-up water heat exchanger (10) water outlet side and subsidiary engine cooling device (11) influent side and be provided with No. six valves (6), the water outlet side of closed-up water heat exchanger (10) is connected by the water outlet side condensate water inlet channel of the pipeline with No. two valves (2) that are provided with No. five valves (5), and the influent side of subsidiary engine cooling device (11) is connected by the influent side condensate water outlet conduit of the pipeline with No. three valves (3) that are provided with No. eight valves (8), No. five valves (5) are arranged between the water outlet side of No. two valves (2) and the influent side of No. six valves (6), and No. eight valves (8) are arranged between the influent side of No. three valves (3) and the water outlet side of No. six valves (6).
2. the heat-exchange system of a kind of 350MW high back pressure thermal power plant unit according to claim 1, it is characterized in that: the pipeline between the closed-up water heat exchanger (10) of closed Water System and subsidiary engine cooling device (11) is also provided with No. seven valves (7), described No. eight valves (8) are arranged between the water outlet side of No. seven valves (7) and the influent side of No. three valves (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520313889.9U CN204648398U (en) | 2015-05-15 | 2015-05-15 | A kind of heat-exchange system of 350MW high back pressure thermal power plant unit |
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| CN201520313889.9U CN204648398U (en) | 2015-05-15 | 2015-05-15 | A kind of heat-exchange system of 350MW high back pressure thermal power plant unit |
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| CN204648398U true CN204648398U (en) | 2015-09-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112393222A (en) * | 2020-12-10 | 2021-02-23 | 华能汕头海门发电有限责任公司 | Arrangement method of condensation water pipeline system of horizontal low-pressure heater of thermal power plant |
-
2015
- 2015-05-15 CN CN201520313889.9U patent/CN204648398U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112393222A (en) * | 2020-12-10 | 2021-02-23 | 华能汕头海门发电有限责任公司 | Arrangement method of condensation water pipeline system of horizontal low-pressure heater of thermal power plant |
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Address after: 050031 No. 6 Jianbei Street, Chang'an District, Shijiazhuang City, Hebei Province Patentee after: China Electric Power Construction Group Hebei electric survey and Design Research Institute Co., Ltd. Address before: 050031 No. 6 Jianbei Street, Chang'an District, Shijiazhuang City, Hebei Province Patentee before: Hebei Province Power Surveying Design & Research Institute |
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| CP01 | Change in the name or title of a patent holder |