CN203756246U - Novel auxiliary machine cooling water system used for indirect air cooling unit - Google Patents

Novel auxiliary machine cooling water system used for indirect air cooling unit Download PDF

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Publication number
CN203756246U
CN203756246U CN201420110324.6U CN201420110324U CN203756246U CN 203756246 U CN203756246 U CN 203756246U CN 201420110324 U CN201420110324 U CN 201420110324U CN 203756246 U CN203756246 U CN 203756246U
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water
subsidiary engine
engine cooling
cooling
indirect air
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CN201420110324.6U
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王小春
寇建玉
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Inner Mongolia Electric Power Survey and Design Institute Co Ltd
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Inner Mongolia Electric Power Survey and Design Institute Co Ltd
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Abstract

The utility model provides a novel auxiliary machine cooling water system used for an indirect air cooling unit, and belongs to the technical field of cooling. The system comprises an auxiliary machine cooling system, a low temperature water supplying system, an indirect air cooling system and a bypass switching system. The indirect air cooling system is connected to the water inlet end of the low temperature water supplying system and the water inlet end of the bypass switching system through water supply pipelines. The water outlet end of the low temperature water supplying system and the water outlet end of the bypass switching system are connected to the water inlet end of the auxiliary machine cooling system. The water outlet end of the auxiliary machine cooling system is connected to a water return pipeline of the indirect air cooling system. The novel auxiliary machine cooling water system used for the indirect air cooling unit solves the problems that if an auxiliary machine cooling tower is arranged independently, the initial investment is high, the occupied area is large and the operation energy consumption is high, and has the advantages of being reasonable in design and safe in operation, saving energy and space and the like.

Description

For the novel subsidiary engine cooling water system of indirect air cooling unit
Technical field
The utility model belongs to cooling technology field, relates in particular to a kind of novel subsidiary engine cooling water system for indirect air cooling unit.
Background technique
Indirect air cooling system refers to that turbine low pressure cylinder steam discharge enters indirect air cooling vapour condenser, this vapour condenser is divided into surface-type and hybrid, carry out cooling by circulating water to the steam in vapour condenser, cooled high temperature circulation water enters indirect dry cooling tower and recycles after cooling by natural ventilation, evaporation loss is little, no matter be the solidifying formula of table or hybrid indirect air cooling system, circulating water all adopts demineralized water.The indirect air cooling system that the utility model relates to can be for thermal power plant be as the independent indirect air cooling system of the cooling use of turbine discharge, operation back pressure is between 7kPa~30kPa, like this in the situation that of back pressure, the circulating cooling coolant-temperature gage of indirect air cooling system can reach 60~70 DEG C, under normal circumstances, summer operation back pressure can be higher, at this time corresponding ambient temperature is also higher, subsidiary engine cooling equipment also improves the requirement of cooling water inflow and coolant water temperature thereupon, so the recirculated cooling water of indirect air cooling system can not be served as the cooling water source of subsidiary engine equipment, , therefore the subsidiary engine cooling system of the thermal power generation unit of domestic employing indirect air cooling system selects to arrange separately the open cycle cooling water of subsidiary engine cooling tower, the cooling water of open and close type combination or closed-type circulating cooling water system, subsidiary engine cooling tower mainly comprises mechanical draft wet cooling tower, devaporizer and several forms of mechanical draft indirect dry cooling tower.Therefore, for indirect air cooling generator set, conventionally all need to arrange separately cooling tower, not only increase floor space, and operation energy consumption is high.
Model utility content
In order to overcome the above-mentioned problems in the prior art, the utility model proposes a kind of novel subsidiary engine cooling water system for indirect air cooling unit, this system does not need to arrange separately subsidiary engine cooling tower, auxiliary machine circulating cooling water directly utilizes the recirculated cooling water of indirect air cooling system as water source, system adopts closed-type circulating cooling water system, by secondary cooling scheme is set, meet summer operation requirement.
For realizing above object, the utility model proposes a kind of novel subsidiary engine cooling water system for indirect air cooling unit, described system comprises subsidiary engine cooling system, low temperature supplying water system, indirect air cooling system and by-pass switching system; Described indirect air cooling system is connected to respectively the feed-water end of described low temperature supplying water system and described by-pass switching system by supply channel; The waterexit end of described low temperature supplying water system and described by-pass switching system is connected to the feed-water end of described subsidiary engine cooling system; The waterexit end of described subsidiary engine cooling system is connected to the water return pipeline of described indirect air cooling system.
According to an aspect of the present utility model, described novel subsidiary engine cooling water system also comprises steam turbine condensing system.
According to an aspect of the present utility model, described novel subsidiary engine cooling water system further comprises the inlet valve that is positioned at described low temperature supplying water system feed-water end and the outlet valve that is positioned at described low temperature supplying water system waterexit end; Also comprise the control valve that is positioned at described by-pass switching system feed-water end, wherein: described indirect air cooling system is connected to respectively the inlet valve of described low temperature supplying water system feed-water end and the control valve of described by-pass switching system feed-water end by supply channel; The outlet valve of described low temperature supplying water system waterexit end and the waterexit end of described by-pass switching system are connected to the feed-water end of described subsidiary engine cooling system.
According to an aspect of the present utility model, described novel subsidiary engine cooling water system further comprises the temperature of the recirculated cooling water of carrying for the supply channel of indirect air cooling system described in sensing and controls the temperature monitoring apparatus of described inlet valve, outlet valve and control valve, and described temperature monitoring apparatus is for opening described inlet valve and outlet valve and close described control valve during higher than first threshold when the temperature of recirculated cooling water; Also for opening described control valve and close described inlet valve and outlet valve in the time that the temperature of recirculated cooling water being equal to or less than first threshold.
According to an aspect of the present utility model, described first threshold is 33 DEG C.
According to an aspect of the present utility model, described indirect air cooling system comprises indirect air cooling cooling tower equipment, low temperature supplying water system comprises lithium bromide refrigerating unit, and subsidiary engine cooling system comprises auxiliary cooling device (could be revised as the cooling equipment of the rotary machine in the unit of thermal power plant).
According to an aspect of the present utility model, described lithium bromide refrigerating unit is steam type lithium bromide unit, and it drives steam from extracted steam from turbine system.
According to an aspect of the present utility model, described lithium bromide refrigerating unit is hot water lithium bromide unit, and it drives hot water hydrophobic from heater condensate and continuous blowdown system of boiler respectively.
According to an aspect of the present utility model, described lithium bromide refrigerating unit is flue gas type lithium bromide unit, and it drives flue gas to come from the smoke evacuation of heat power plant boiler afterbody.
According to an aspect of the present utility model, described novel subsidiary engine cooling water system also comprises steam turbine set equipment, and described steam turbine set equipment is condensed steam type or steam extraction and condensing formula steam turbine.
According to an aspect of the present utility model, described steam turbine condensing system comprises steam turbine condenser, and described steam turbine condenser is surface condenser or direct-contact type condenser.
This programme can thoroughly solve thermal power plant indirect air cooling system and can not utilize the interior circulating water of indirect dry cooling tower as subsidiary engine cooling water source, the problem of subsidiary engine cooling tower need to be set separately, simplify subsidiary engine cooling water system, save the subsidiary engine cooling tower arranging separately and take up an area, reduce construction investment.If secondary cooling equipment lithium bromide unit adopts the waste heat in thermal power plant to drive, hot water, the heater condensate etc. of such as boiler tail smoke evacuation, continuous blowdown system of boiler, energy recovery section heat in whole service process, energy-saving effect is better.
Brief description of the drawings
Fig. 1 is the fundamental composition structural drawing according to subsidiary engine cooling water system of the present utility model;
Fig. 2 is according to subsidiary engine cooling water system the first embodiment's of the present utility model schematic diagram;
Fig. 3 is according to subsidiary engine cooling water system the second embodiment's of the present utility model schematic diagram;
Fig. 4 is according to subsidiary engine cooling water system the 3rd embodiment's of the present utility model schematic diagram;
Fig. 5 is according to subsidiary engine cooling water system the 4th embodiment's of the present utility model schematic diagram.
Embodiment
The following stated is better embodiment of the present utility model, does not therefore limit protection domain of the present utility model.
We are first referring to according to the fundamental composition structure of subsidiary engine cooling water system of the present utility model, as shown in Figure 1.
The novel subsidiary engine cooling water system for indirect air cooling unit the utility model proposes comprises subsidiary engine cooling system S01, low temperature supplying water system S02, steam turbine condensing system S03, indirect air cooling system S04, and by-pass switching system S05.The cooling recirculated cooling water of indirect air cooling system S04 offers subsidiary engine cooling system S01 by pipeline.Between indirect air cooling system S04 and subsidiary engine cooling system S01, add low temperature supplying water system S02 and by-pass switching system S05, low temperature supplying water system S02 starts (control valve of opening low temperature supplying water system) for example, during higher than first threshold (33 DEG C) when circulating cooling coolant-temperature gage, and by-pass switching system S05 starts (control valve of unlatching by-pass switching system) during lower than first threshold when circulating cooling coolant-temperature gage.Wherein, indirect air cooling system S04 is connected with the inlet valve of low temperature supplying water system S02 feed-water end and the control valve of by-pass switching system S05 feed-water end respectively by circulating water supply channel; The outlet valve of low temperature supplying water system S02 waterexit end and the waterexit end of by-pass switching system S05 are connected with the feed-water end of subsidiary engine cooling system S01; The waterexit end of subsidiary engine cooling system S01 is connected with the circulating water water return pipeline of indirect air cooling system S04.Like this, when circulating cooling coolant-temperature gage is during higher than first threshold, the terminal valve of low temperature supplying water system S02 is opened and the control valve of by-pass switching system S05 is closed, and recirculated cooling water indirect air cooling system S04 being provided by low temperature supplying water system S02 carries out further cooling and flow to subsidiary engine cooling system S01; When circulating cooling coolant-temperature gage is during less than or equal to first threshold, the terminal valve of low temperature supplying water system S02 is closed and the control valve unlatching of by-pass switching system S05, and the recirculated cooling water directly indirect air cooling system S04 being provided by by-pass switching system S05 flows to subsidiary engine cooling system S01.Therefore, in native system, also comprise the temperature monitoring apparatus of closing and opening for controlling above-mentioned terminal valve and control valve, for example detect the recirculated cooling water that indirect air cooling system S04 provides temperature temperature transducer and according to the controller of testing result control valve open and close, described controller can be made by single-chip microcomputer, back yard industry computer or other chips, because the particular hardware device of realizing described temperature monitoring apparatus is prior art, repeat no more here.
Below specific embodiment of the utility model is described, specifically referring to Fig. 2-Fig. 5, shows four embodiments.Wherein, steam turbine condensing system S03 can comprise steam turbine condenser 103, indirect air cooling system S04 can comprise indirect air cooling cooling tower equipment 105, and low temperature supplying water system S02 can comprise lithium bromide refrigerating unit 101, and subsidiary engine cooling system S01 can comprise auxiliary cooling device 102.Wherein 104 refer to steam turbine set equipment.Lithium bromide refrigerating unit 101 can be steam type lithium bromide unit, hot water lithium bromide unit, flue gas type lithium bromide unit.Steam turbine set equipment 104 can be condensed steam type, steam extraction and condensing formula steam turbine.Steam turbine condenser 103 is surface condenser or direct-contact type condenser etc.
The lithium bromide refrigerating unit adopting in these specific embodiments can utilize the waste heat in existing thermal power plant to drive, and reaches using energy source and maximizes.The quantity of circulating water of indirect air cooling system is mainly used in the cooling of turbine discharge, and auxiliary machine circulating cooling water amount is only 10% of total Water, so secondary cooling equipment lithium bromide unit is only according to subsidiary engine consumption type selecting.
Referring to the first embodiment shown in Fig. 2, described lithium bromide refrigerating unit 101 is steam type lithium bromide unit, wherein drives steam from extracted steam from turbine system 109.
Second, third embodiment who illustrates respectively referring to Fig. 3 and Fig. 4, described lithium bromide refrigerating unit 101 is hot water lithium bromide unit, wherein drives hot water hydrophobic from heater 106 and continuous blowdown system of boiler continuous sewage-discharge volum expander for boiler 107 is hydrophobic respectively.
Referring to the 4th embodiment shown in Fig. 5, described lithium bromide refrigerating unit 101 is flue gas type lithium bromide unit, wherein drives flue gas to come from heat power plant boiler 108 afterbody smoke evacuations.
Known according to the above-mentioned description for each embodiment, the scheme tool the utility model proposes has the following advantages: 1. compared with prior art scheme, this programme can directly utilize the recirculated cooling water of indirect air cooling unit as subsidiary engine cooling water source, can provide low-temperature water source for subsidiary engine cooling system by technique simple to operation, do not need to arrange separately cooling tower, reduce plant area's floor space; 2. native system, only in part-time operation, reduces full factory energy consumption; 3. this programme merges operation by subsidiary engine cooling system and main frame indirect air cooling system, has reduced the initial cost of full plant; If the lithium bromide unit that 4. this programme adopts utilizes the waste heat in thermal power plant, can recovery section heat, improve unit heat economy.
Should note; the embodiment that the utility model proposes and application be the object for illustrating only;, as the restriction to the utility model protection domain, those skilled in the art can not modify to meet actual demand to embodiment of the present utility model.

Claims (11)

1. for a novel subsidiary engine cooling water system for indirect air cooling unit, it is characterized in that:
Described system comprises subsidiary engine cooling system, low temperature supplying water system, indirect air cooling system and by-pass switching system;
Described indirect air cooling system is connected to respectively the feed-water end of described low temperature supplying water system and described by-pass switching system by supply channel;
The waterexit end of described low temperature supplying water system and described by-pass switching system is connected to the feed-water end of described subsidiary engine cooling system;
The waterexit end of described subsidiary engine cooling system is connected to the water return pipeline of described indirect air cooling system.
2. novel subsidiary engine cooling water system according to claim 1, is characterized in that:
Described novel subsidiary engine cooling water system also comprises steam turbine condensing system.
3. novel subsidiary engine cooling water system according to claim 1, is characterized in that:
Described novel subsidiary engine cooling water system further comprises the inlet valve that is positioned at described low temperature supplying water system feed-water end and the outlet valve that is positioned at described low temperature supplying water system waterexit end; Also comprise the control valve that is positioned at described by-pass switching system feed-water end, wherein:
Described indirect air cooling system is connected to respectively the inlet valve of described low temperature supplying water system feed-water end and the control valve of described by-pass switching system feed-water end by supply channel;
The outlet valve of described low temperature supplying water system waterexit end and the waterexit end of described by-pass switching system are connected to the feed-water end of described subsidiary engine cooling system.
4. novel subsidiary engine cooling water system according to claim 3, is characterized in that:
Described novel subsidiary engine cooling water system further comprises the temperature of the recirculated cooling water of carrying for the supply channel of indirect air cooling system described in sensing and controls the temperature monitoring apparatus of described inlet valve, outlet valve and control valve, and described temperature monitoring apparatus is for opening described inlet valve and outlet valve and close described control valve during higher than first threshold when the temperature of recirculated cooling water; Also for opening described control valve and close described inlet valve and outlet valve in the time that the temperature of recirculated cooling water being equal to or less than first threshold.
5. novel subsidiary engine cooling water system according to claim 4, is characterized in that:
Described first threshold is 33 DEG C.
6. novel subsidiary engine cooling water system according to claim 1, is characterized in that:
Described indirect air cooling system comprises indirect air cooling cooling tower equipment, and low temperature supplying water system comprises lithium bromide refrigerating unit, and subsidiary engine cooling system comprises auxiliary cooling device.
7. novel subsidiary engine cooling water system according to claim 6, is characterized in that:
Described lithium bromide refrigerating unit is steam type lithium bromide unit, and it drives steam from extracted steam from turbine system.
8. novel subsidiary engine cooling water system according to claim 6, is characterized in that:
Described lithium bromide refrigerating unit is hot water lithium bromide unit, and it drives hot water hydrophobic from heater condensate and continuous blowdown system of boiler respectively.
9. novel subsidiary engine cooling water system according to claim 6, is characterized in that:
Described lithium bromide refrigerating unit is flue gas type lithium bromide unit, and it drives flue gas to come from the smoke evacuation of heat power plant boiler afterbody.
10. novel subsidiary engine cooling water system according to claim 1, is characterized in that:
Described novel subsidiary engine cooling water system also comprises steam turbine set equipment, and described steam turbine set equipment is condensed steam type or steam extraction and condensing formula steam turbine.
11. novel subsidiary engine cooling water systems according to claim 2, is characterized in that:
Described steam turbine condensing system comprises steam turbine condenser, and described steam turbine condenser is surface condenser or direct-contact type condenser.
CN201420110324.6U 2014-03-12 2014-03-12 Novel auxiliary machine cooling water system used for indirect air cooling unit Active CN203756246U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104807343A (en) * 2014-09-24 2015-07-29 北京龙源冷却技术有限公司 Control system for indirect air cooling system drain valve
CN107462084A (en) * 2017-07-28 2017-12-12 中国电力工程顾问集团西北电力设计院有限公司 A kind of combining structure of host machine cooling system and subsidiary engine cooling system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104807343A (en) * 2014-09-24 2015-07-29 北京龙源冷却技术有限公司 Control system for indirect air cooling system drain valve
CN104807343B (en) * 2014-09-24 2016-12-07 北京龙源冷却技术有限公司 A kind of control system for indirect air cooling system drain valve
CN107462084A (en) * 2017-07-28 2017-12-12 中国电力工程顾问集团西北电力设计院有限公司 A kind of combining structure of host machine cooling system and subsidiary engine cooling system

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C56 Change in the name or address of the patentee

Owner name: INNER MONGOLIA ELECTRIC POWER SURVEY DESIGN INSTIT

Free format text: FORMER NAME: INNER MONGOLIA ELECTRICAL POWER INVESTIGATE AND DESIGN INSTITUTE

CP01 Change in the name or title of a patent holder

Address after: 010010 Hohhot, the Inner Mongolia Autonomous Region Tin Road, No. 209

Patentee after: INNER MONGOLIA ELECTRIC POWER SURVEY & DESIGN INSTITUTE CO., LTD.

Address before: 010010 Hohhot, the Inner Mongolia Autonomous Region Tin Road, No. 209

Patentee before: Inner Mongolia Electric Power Survey Design Institute