CN203607105U - Closed cooling water system for nuclear power plant - Google Patents

Closed cooling water system for nuclear power plant Download PDF

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Publication number
CN203607105U
CN203607105U CN201320834789.1U CN201320834789U CN203607105U CN 203607105 U CN203607105 U CN 203607105U CN 201320834789 U CN201320834789 U CN 201320834789U CN 203607105 U CN203607105 U CN 203607105U
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water
closed
cooler
enclosed
nuclear
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CN201320834789.1U
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王学华
胡友情
薛海青
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China General Nuclear Power Corp
China Nuclear Power Engineering Co Ltd
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China General Nuclear Power Corp
China Nuclear Power Engineering Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00Energy generation of nuclear origin
    • Y02E30/30Nuclear fission reactors

Abstract

The utility model discloses a closed cooling water system for a nuclear power plant. A user set cooler, a closed water pump and a closed type water pipeline in the closed water cooler are connected with one another in series to form a closed hoop, a condenser and an open type water pipeline in the closed condenser are connected with each other in parallel and are connected with a circular water pump in series, and the closed water cooler is a pipe housing type cooler; the open type water in an open type water resource is boosted by the circular water pump, one path of open type water is used by a vacuum supply system of the condenser after being sent into the condenser, and the other path of open type water is sent into the closed type water cooler; the closed type water is sent into the closed type water cooler after being boosted by the closed type water pump, is distributed to the user set cooler after being cooled with the open type water in a heat exchange way in the closed type water cooler, and returns back to the closed water pump after being heated in the user set cooler by means of heat absorption to complete the closed type circulation of the closed type water; the open type water is discharged back to the open type water resource after being heated in the closed type water cooler in a heat exchanging way. After the closed cooling water system is used, the resources can be saved, and the cost can be reduced.

Description

A kind of closed type cooling water system for nuclear
Technical field
The utility model relates to nuclear power field, relates in particular to a kind of closed type cooling water system for nuclear.
Background technology
Energy-saving and emission-reduction are important topics of 21 century development energy industry, and nuclear power also must improve as possible the utilization factor of nuclear energy and reduce the exhaust emission to environment as basic power source under the prerequisite that guarantees security.
Closed type cooling water system for nuclear, is the requisite important system such as nuclear power plant, thermal power plant, solar energy thermal-power-generating factory, and undertaking the heat radiation discharge of power plant's main frame and the generation of subsidiary engine equipment operation is the effect of ultimate heat sink, referring to Fig. 1.Coastal Power Plant general using seawater or water of river and lake, as low-temperature receiver, are discharged into rivers,lakes and seas by closed water cooler by each user's unit heat dissipation capacity.
The function of closed type cooling water system for nuclear is the chilled water that filtration is provided for the refrigeratory of conventional island closed cooling water system, as ultimate heat sink, the heat of steam turbine plant and equipment and partial common facilities and equipment running generation is derived, guarantee the safe operation of these equipment.
In traditional nuclear power station, be mostly to utilize seawater or water of river and lake (hereinafter to be referred as opened water) as low-temperature receiver, the exchange heat that enclosed water is absorbed at each user's unit is out and be discharged to rivers,lakes and seas.Refer to shown in Fig. 1, take Daya Bay nuclear power plant as example, water circulating pump is used to opened water circulation that power is provided, and opened water is boosted, and a road is delivered to condenser and used for evacuation system for steam condenser; The boosted pump in another road boosts and sends into the closed water cooler of panel cooler form, and the hot backwater of delivering to closed water cooler with enclosed water pump carries out heat interchange, then flows back to open type water source.
This closed type cooling water system for nuclear adopts panel cooler to carry out heat exchange as closed water cooler, need the auxiliary chilled water booster of configuration could finishing equipment heat dissipation capacity to discharge as power, cause the waste of power resource, increased the maintenance cost of the maintenance of pump and the loss of spare and accessory parts and equipment simultaneously.For example Daya Bay nuclear power plant closed cooling water system complexity, equipment is more, increase of investment, the station service of operation increases, and repair and maintenance expense increases.The auxiliary chilled water booster initial cost of Daya Bay nuclear power plant increases by 2,800,000 yuan according to statistics, and operating cost increases by 400,000 yuan every year.
Utility model content
The utility model embodiment technical matters to be solved is, for closed type cooling water system for nuclear waste resource and the higher defect of cost in prior art, provides the closed type cooling water system for nuclear that a kind of saving resource and expense are lower.
In order to solve the problems of the technologies described above, the utility model embodiment provides a kind of closed type cooling water system for nuclear, comprise enclosed water pump, closed water cooler, condenser, water circulating pump and user's unit refrigeratory, described closed water cooler comprises opened water pipeline and enclosed waterpipe, described user's unit refrigeratory, described enclosed water pump, and enclosed waterpipe in described closed water cooler is serially connected in closed circuit successively, described condenser is connected with described water circulating pump with after opened water pipeline parallel connection in described closed water cooler again, wherein said closed water cooler is shell and tube cooler, opened water in open type water source is boosted by water circulating pump, and condenser is sent into for evacuation system for steam condenser in a road, and described closed water cooler is sent on another road, enclosed water is sent into closed water cooler after being boosted by enclosed water pump, in closed water cooler with after opened water heat exchange cooling, be assigned to described user's unit refrigeratory, in described user's unit refrigeratory, heat absorption is got back to enclosed water pump after heating up, and completes the closed cycle of enclosed water, opened water in described closed water cooler after heat exchange intensification is flow back to described open type water source.
In closed type cooling water system for nuclear described in the utility model, in described closed circuit, be provided with the first switch module of the break-make for controlling described closed circuit enclosed water.
In closed type cooling water system for nuclear described in the utility model, described the first switch module comprises the first valve being arranged between described enclosed water pump and described closed water cooler.
In closed type cooling water system for nuclear described in the utility model, described the first switch module comprises the second valve being arranged between described closed water cooler and described user's unit refrigeratory.
In closed type cooling water system for nuclear described in the utility model, the opened water on the suction side of described closed water cooler is provided with the 3rd valve of the break-make for controlling closed water cooler middle open type water
In closed type cooling water system for nuclear described in the utility model, the opened water outlet side of described closed water cooler is provided with the 4th valve of the break-make for controlling closed water cooler middle open type water.
In closed type cooling water system for nuclear described in the utility model, the opened water entrance side of described water circulating pump is provided with water circulating pump filter screen.
Implement the utility model embodiment, there is following beneficial effect: be set to shell-and-tube by closed water cooler cooling, no longer need to be at opened water on the suction side configuration booster and the filter screen of closed water cooler, in meeting systemic-function, the configuration of minimizing equipment, reduces engineering initial cost; Reduce operation and maintenance cost by cancelling pump on the other hand, saved the plant consumption of enclosed water booster.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the schematic diagram of closed type cooling water system for nuclear in prior art;
Fig. 2 is the schematic diagram of the closed type cooling water system for nuclear that provides of the utility model preferred embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.
Refer to Fig. 2, it is the schematic diagram of the closed type cooling water system for nuclear that provides of the utility model preferred embodiment, closed type cooling water system for nuclear provides auxiliary cooling function for the each user's unit of enclosed water, this closed type cooling water system for nuclear comprises enclosed water pump 2, closed water cooler 3, user's unit refrigeratory 1, condenser 5 and water circulating pump 4, closed water cooler 3 comprises opened water pipeline and enclosed waterpipe, described user's unit refrigeratory 1, described enclosed water pump 2, and enclosed waterpipe in described closed water cooler 3 is serially connected in closed circuit successively, described condenser 5 is connected with described water circulating pump 4 with after opened water pipeline parallel connection in described closed water cooler 3 again, wherein said closed water cooler 3 is shell and tube coolers.
Compared with prior art, closed water cooler 3 adopts shell and tube cooler, rather than panel cooler, thereby does not need booster is set again, but directly utilizes the lift of water circulating pump 4 to supply water.This be because, the water resistance of shell and tube cooler is less than the water resistance of panel cooler, is about 3m, shell and tube cooler hydroecium peak absolute altitude is+2.0m; The water resistance of condenser 5 is about 6m, and condenser water box peak absolute altitude is also+2.0m; When condenser 5 moves under negative pressure state, be about-1.5m of the pressure head of hydroecium after condenser.Although therefore cancelled booster, closed type cooling water system for nuclear still can move with security and stability.
In closed cooling water system as shown in Figure 2, enclosed water is demineralized water, and user's unit comprises turbodynamo and other subsidiary engine equipment.For example, opened water in open type water source (seawater) is boosted by water circulating pump 4, and condenser 5 is sent into for evacuation system for steam condenser in a road, and described closed water cooler 3 is sent on another road; Enclosed water is sent into closed water cooler 3 after being boosted by enclosed water pump 2, in closed water cooler 3 with after opened water heat exchange cooling, be assigned to described user's unit refrigeratory 1, in described user's unit refrigeratory 1, heat absorption is got back to enclosed water pump 2 after heating up, and completes the closed cycle of enclosed water; Opened water in described closed water cooler 3 after heat exchange intensification is flow back to described open type water source.
In addition, as shown in Figure 1, in prior art, the opened water on the suction side of booster is also provided with booster filter screen, in embodiment of the present utility model, this booster filter screen also can also be cancelled.This be because, the diameter of the pipeline that panel cooler connects is 16mm, and the diameter of the pipeline that shell and tube cooler connects is 19mm, closed water cooler 3 is changed into after shell and tube cooler by panel cooler, the diameter in institute's adapter road increases, there is the probability of plugging very little, no longer need to the opened water of closed water cooler 3 as early as possible side original booster filter screen is set in addition.In addition, in preferred embodiment of the present utility model, can be as prior art, the water circulating pump filter screen 6 of drum type is set at the opened water on the suction side of water circulating pump 4, pore size filter is 3mm, opposite opened water carries out tentatively filtering, and so just more need to install booster filter screen additional at the opened water on the suction side of closed water cooler 3.Wherein, water circulating pump filter screen 6 and booster filter screen all adopt electric filter conventionally.
Compared with adopting panel cooler with closed type cooling water system for nuclear in prior art, the closed type cooling water system for nuclear that the utility model provides need be at opened water on the suction side configuration booster and the booster filter screen of closed water cooler 3, in meeting systemic-function, the configuration of minimizing equipment, reduces engineering initial cost; Reduce operation and maintenance cost by cancelling pump on the other hand, saved the plant consumption of enclosed water booster.
Preferably, in described closed circuit, be provided with the first switch module of the break-make for controlling described closed circuit enclosed water.For example, described the first switch module comprise be arranged on the first valve K1 between described enclosed water pump 2 and described closed water cooler 3 and/or be arranged on described closed water cooler 3 and described user's unit refrigeratory 1 between the second valve K2.As shown in Figure 2, the enclosed water inlet side of closed water cooler 3 and enclosed water out side are respectively arranged with described the first valve K1 and described the second valve K2.In addition, can also the 3rd valve K3 be set and/or at the opened water outlet side of closed water cooler 3, the 4th valve K4 be set at the opened water on the suction side of closed water cooler 3, for controlling the break-make of closed water cooler 3 middle open type water.Wherein, K1, K2, K3, K4 can be all electric butterfly valves.
The closed cooling water system providing due to the utility model embodiment is directly to utilize the lift of water circulating pump 4 to supply water, therefore it is to be directly connected with recirculating cooling water system, in the time carrying out waterhummer analysis must and the recirculating cooling water system modeling analysis of putting together, closed type cooling water system for nuclear is to have valve system, the measure of systematic waterproofing hammer is, total valve in the time that water circulating pump 4 is stopped transport on the import of corresponding interlocking close closed type cooling water system for nuclear and outlet conduit is to reach the object of eliminating water hammer, the shut-in time of valve is 8-10 second, need to calculate and determine according to the transient state of closed type cooling water system for nuclear.
Carry out qualitative assessment as an example of the 1000MW of Yangjiang Nuclear Power factory level unit example from two aspects below.
1) performance evaluation that engineering initial cost reduces
According to the system of two schemes, the support equipment of system relatively sees the following form 1:
The comparison of table 1 two schemes support equipment
Figure BDA0000439870550000051
Can find out by the contrast in upper table 1, the difference of two schemes system support maximum is that the closed cooling water system that the utility model provides has been cancelled the booster supporting with closed water cooler and booster filter screen, has simplified system configuration.
According to design conditions and system requirements, with reference to market situation, system equipment initial cost economy is relatively in table 2; System year, performance driving economy was relatively in table 3.
Table 2 investment of equipment economy comparison (by a unit)
Figure BDA0000439870550000052
Figure BDA0000439870550000061
2) performance evaluation of saving station service
Table 3 year performance driving economy comparison (by 1 unit)
Figure BDA0000439870550000062
Illustrate: 1, the seawater flow of shell and tube cooler is compared with the approximately large 2092t/h of panel cooler, and the power that need to increase water circulating pump increases seawater flow.
2, filter screen back flush is intermittent duty, and power is less, and power consumption is ignored at this.
3, the unit operation time presses 7000 hours/year, and the station-service electricity charge are calculated by 0.35 yuan/degree.
Can find out from table 2, table 3, while adopting New Scheme, the investment of equipment of every unit is saved 4,860,000 yuan, and annual operating cost is saved 36.3 ten thousand yuan, and operation in 40 years can be saved 14,520,000 yuan.
In addition, scheme of the present utility model has been cancelled booster, and therefore without the maintenance of pump and the loss of spare and accessory parts, and sea-water type valve quantity also greatly reduces, thereby also greatly saved the maintenance cost of equipment.
Above disclosed is only a kind of preferred embodiment of the utility model, certainly can not limit with this interest field of the utility model, one of ordinary skill in the art will appreciate that all or part of flow process that realizes above-described embodiment, and the equivalent variations of doing according to the utility model claim, still belong to the scope that utility model contains.

Claims (7)

1. a closed type cooling water system for nuclear, it is characterized in that, comprise enclosed water pump (2), closed water cooler (3), condenser (5), water circulating pump (4) and user's unit refrigeratory (1), described closed water cooler (3) comprises opened water pipeline and enclosed waterpipe, described user's unit refrigeratory (1), described enclosed water pump (2), and the interior enclosed waterpipe of described closed water cooler (3) is serially connected in closed circuit successively, after opened water pipeline parallel connection in described condenser (5) and described closed water cooler (3), connect with described water circulating pump (4) again, wherein said closed water cooler (3) is shell and tube cooler, opened water in open type water source is boosted by water circulating pump (4), and condenser (5) is sent into for evacuation system for steam condenser in a road, and described closed water cooler (3) is sent on another road, enclosed water is sent into closed water cooler (3) after being boosted by enclosed water pump (2), in closed water cooler (3) with after opened water heat exchange cooling, be assigned to described user's unit refrigeratory (1), in described user's unit refrigeratory (1), heat absorption is got back to enclosed water pump (2) after heating up, and completes the closed cycle of enclosed water, opened water in described closed water cooler (3) after heat exchange intensification is flow back to described open type water source.
2. closed type cooling water system for nuclear as claimed in claim 1, is characterized in that, is provided with the first switch module of the break-make for controlling described closed circuit enclosed water in described closed circuit.
3. closed type cooling water system for nuclear as claimed in claim 2, is characterized in that, described the first switch module comprises the first valve (K1) being arranged between described enclosed water pump (2) and described closed water cooler (3).
4. closed type cooling water system for nuclear as claimed in claim 2 or claim 3, is characterized in that, described the first switch module comprises the second valve (K2) being arranged between described closed water cooler (3) and described user's unit refrigeratory (1).
5. closed type cooling water system for nuclear as claimed in claim 2, is characterized in that, the opened water on the suction side of described closed water cooler (3) is provided with the 3rd valve (K3) of the break-make for controlling closed water cooler (3) middle open type water.
6. the closed type cooling water system for nuclear as described in claim 2 or 5, is characterized in that, the opened water outlet side of described closed water cooler (3) is provided with the 4th valve (K4) of the break-make for controlling closed water cooler (3) middle open type water.
7. closed type cooling water system for nuclear as claimed in claim 1, is characterized in that, the opened water entrance side of described water circulating pump (4) is provided with water circulating pump filter screen (6).
CN201320834789.1U 2013-12-17 2013-12-17 Closed cooling water system for nuclear power plant Expired - Lifetime CN203607105U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105469841A (en) * 2016-01-04 2016-04-06 上海核工程研究设计院 Equipment cooling water system of floating nuclear power plant
CN110428913A (en) * 2019-07-18 2019-11-08 中广核工程有限公司 A kind of nuclear power plant's supplement heat rejecter water system and design method
CN110686526A (en) * 2019-03-08 2020-01-14 安徽皖能电力运营检修有限公司 Energy-saving method for cooling water system of coal-fired unit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105469841A (en) * 2016-01-04 2016-04-06 上海核工程研究设计院 Equipment cooling water system of floating nuclear power plant
CN110686526A (en) * 2019-03-08 2020-01-14 安徽皖能电力运营检修有限公司 Energy-saving method for cooling water system of coal-fired unit
CN110428913A (en) * 2019-07-18 2019-11-08 中广核工程有限公司 A kind of nuclear power plant's supplement heat rejecter water system and design method
CN110428913B (en) * 2019-07-18 2021-01-19 中广核工程有限公司 Nuclear power plant auxiliary cooling water system and design method

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