CN103043839A - System for removing total organic carbon for demineralization water system for nuclear power station and control method - Google Patents
System for removing total organic carbon for demineralization water system for nuclear power station and control method Download PDFInfo
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- CN103043839A CN103043839A CN2013100025042A CN201310002504A CN103043839A CN 103043839 A CN103043839 A CN 103043839A CN 2013100025042 A CN2013100025042 A CN 2013100025042A CN 201310002504 A CN201310002504 A CN 201310002504A CN 103043839 A CN103043839 A CN 103043839A
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
Abstract
The invention discloses a system for removing total organic carbon for a demineralization water system for a nuclear power station and a control method and belongs to the field of a demineralized water treatment system of the nuclear power station. The system at least comprises a high pressure pump, a reverse osmosis device, ultraviolet disinfection equipment, relevant pipelines and control valves, wherein a water outlet of the high pressure pump is connected with the reverse osmosis device by the water inflow pipeline of the demineralization water system, the reverse osmosis device is connected with the ultraviolet disinfection equipment by the reverse osmosis working pipeline. The control method comprises the steps of a normal operation condition, system down, an abnormal condition, switching from the normal operation condition to the abnormal condition, a disqualified water producing discharge condition and RO+UV (Reverse Osmosis+Ultraviolet) operation control. With the adoption of the system for removing the total organic carbon for the nuclear power station, which integrates reverse osmosis and ultraviolet disinfection, the TOC (Total Organic Carbon) of various water sources can be removed gradiently, the adaptability of the demineralized water treatment system to the water sources is improved, the TOC removal rate is stable, and the stable operation of a thermodynamic system of the nuclear power station can be maintained.
Description
Technical field
The present invention relates to nuclear plant desalting water treatment system field, particularly a kind of system and control method of nuclear plant desalting water system removing total organic carbon.
Background technology
The function of nuclear plant desalting water system is to process former water pretreatment system water, remove through the dissolved salt in the clear water after the former water pretreatment by the combination of distillation, reverse osmosis, ion-exchange or these methods, obtain the one-level de-mineralized water, then the one-level de-mineralized water is met the de-mineralized water of unit requirement by mixed bed.The content of organic substance in the water represents with the amount of the principal element-carbon in the organism, is called total organic carbon (hereinafter to be referred as TOC).
AP1000 described in the literary composition is a kind of advanced person's non-active compressed water reactor nuclear power technology (hereinafter to be referred as AP1000), fission occurs and produces a large amount of heat energy in the nuclear fuel that adopts uranium to make in the equipment of " reactor ", with the water that is under the high pressure heat energy is taken out of again, produce steam in vapour generator, the Steam Actuation steam turbine is with generator together rotary electrification.
The nuclear plant desalting water treatment system is one of important subsystem of AP1000 Nuclear power plants, and its effect is equal to the Boiler water Feeding System system of thermal power plant.The de-mineralized water treatment system is produced the water Water Quality Control Indexes and is mainly contained conductance, silicate content, TOC etc., and wherein the control difference of TOC on nuclear, lighter group is very large.The AP1000 Nuclear power plants is higher than fired power generating unit far away to the control of TOC index in the de-mineralized water, and wherein AP1000 requires TOC≤50ppb, and thermal power plant's high pressure unit requires TOC≤500ppb and only where necessary monitoring.This has just proposed requirements at the higher level to the nuclear plant desalting water treatment process design.
In realizing process of the present invention, the contriver finds that there is following problem at least in prior art:
1, de-mineralized water treatment system product water TOC content is limited by source quality
The de-mineralized water treatment system main technique of domestic AP1000 Nuclear power plants founding a capital is the method that adopts reverse osmosis (hereinafter to be referred as RO) to combine with ion-exchange demineralization at present, continued the Boiler water Feeding System technique of thermal power plant, except the AP1000 Nuclear power plants, other Nuclear power plants or thermal power station all do not have the special processing requirement that proposes to remove TOC.Therefore require that TOC content maintains 5ppm in the water source, be limited by the water source situation, can't solve by existing technique, in nuclear power plant construction, almost be difficult to reach.
2, de-mineralized water treatment system TOC clearance is unstable
TOC is an overall target, its composition is very complicated, bacterium, microorganism, biochemical oxygen demand (BOD) (BOD), larger molecular organics etc. all belong to TOC, and employing reverse osmosis+ion exchange desalting method is different to the TOC clearance that difference forms, if the ratio that larger molecular organics accounts among the TOC is higher, then clearance is higher, otherwise clearance is lower, the TOC clearance is unstable, so affect the steady running of Nuclear power plants therrmodynamic system.
Summary of the invention
In order to solve the problem of prior art, the embodiment of the invention provides a kind of system and control method of nuclear plant desalting water system removing total organic carbon.Improve the de-mineralized water treatment system to the adaptability of source quality, the TOC clearance is stable, is conducive to keep the steady running of Nuclear power plants therrmodynamic system.Described technical scheme is as follows:
On the one hand, a kind of system of nuclear plant desalting water system removing total organic carbon is provided, described system comprises at least: high-pressure pump, reverse osmosis unit, UV sterilizer and associated pipe, by-pass valve control, described high-pressure pump water outlet comes water lines to connect described reverse osmosis unit by DW system demineralized water system, and described reverse osmosis unit connects described UV sterilizer by the reverse osmosis working line.
Further, described UV sterilizer connects follow-up water treating equipment by qualified product water outlet pipeline; Described high-pressure pump water-in comes water lines to connect the RO pre-processing device by DW system demineralized water system.
Particularly, described associated pipe comprises at least: DW system demineralized water system comes the branch road of water lines, reverse osmosis working line, dense water lines, reverse osmosis working line, qualified product water outlet pipeline, the bypass of UV sterilizer, the defective product water discharge spout of UV sterilizer road, the defective product water discharge spout of reverse osmosis unit road; Described by-pass valve control comprises at least: high-pressure pump entrance automatic valve, high-pressure pump outlet non-return valve door, high-pressure pump outlet automatic valve, reverse osmosis unit outlet non-return valve door, UV sterilizer inlet valve, UV sterilizer flowing water Valve, UV sterilizer bypass valve, reverse osmosis unit concentrated water discharge check valve, reverse osmosis unit concentrated water discharge automatic valve, the defective product water discharging valve of reverse osmosis unit door, the defective product water discharging valve of UV sterilizer door.
Further, described DW system demineralized water system comes water lines to refer to by described RO pre-processing device water outlet to the pipeline between the described reverse osmosis unit water inlet; The branch road of described reverse osmosis working line refers to a pipeline on described reverse osmosis working line; Described dense water lines refers to by the water outlet of the described pressurized vessel pipeline that gives off the mouth of a river to described dense water lines; Described reverse osmosis working line refers to by described reverse osmosis unit water inlet to the pipeline between the UV sterilizer water inlet; Described qualified product water outlet pipeline refers to by the UV sterilizer water outlet to the pipeline between the described follow-up water treating equipment; The bypass of described UV sterilizer refers to by the bypass water inlet to the pipeline between the bypass water outlet; The defective product water discharge spout of described UV sterilizer road refers to the pipeline that is connected between described UV sterilizer water outlet and described bypass water outlet; The defective product water discharge spout of described reverse osmosis unit road refers to the pipeline that connects on the described reverse osmosis working line.
Particularly, described DW system demineralized water system comes to be provided with in turn on the water lines described high-pressure pump entrance automatic valve, high-pressure pump outlet non-return valve door, high-pressure pump outlet automatic valve, described high-pressure pump entrance automatic valve is between described RO pre-processing device water outlet and described high-pressure pump water-in, and described high-pressure pump outlet non-return valve door, high-pressure pump outlet automatic valve are between described high-pressure pump water outlet and described reverse osmosis unit water inlet; Be parallel with several pressurized vessels, sampling switch valve on the branch road of described reverse osmosis working line and the described reverse osmosis working line; The water outlet of described each pressurized vessel connects described dense water lines, and the end of described dense water lines is provided with described reverse osmosis unit concentrated water discharge check valve, described reverse osmosis unit concentrated water discharge automatic valve in turn.
Particularly, be provided with in turn described reverse osmosis unit outlet non-return valve door, UV sterilizer inlet valve on the described reverse osmosis working line, described reverse osmosis unit outlet non-return valve door is positioned at the front end of described bypass water inlet; Described UV sterilizer inlet valve is positioned at the rear end of described bypass water inlet; Be provided with described UV sterilizer flowing water Valve on the described qualified product water outlet pipeline; Be provided with described UV sterilizer bypass valve in the bypass of described UV sterilizer; Be provided with the defective product water discharging valve of described UV sterilizer door on the defective product water discharge spout of the described UV sterilizer road; Be provided with the defective product water discharging valve of described reverse osmosis unit door on the defective product water discharge spout of the described reverse osmosis unit road.
Particularly, the UV sterilizer water inlet of described UV sterilizer connects the water outlet of described reverse osmosis working line, and described UV sterilizer water outlet connects the water inlet of described qualified product water outlet pipeline; Described bypass water inlet and bypass water outlet are connected on described reverse osmosis working line and the described qualified product water outlet pipeline; The ultraviolet wavelength of described UV sterilizer is 185nm.
On the other hand, the control method of a kind of nuclear plant desalting water removing total organic carbon system is provided, and described control method comprises: 1) accidental conditions, 2) system-down, 3) damage, 4) accidental conditions to damage switch, 5) defective product water discharging operating mode, 6) processing step under the different operating modes of RO+UV operation control; Wherein,
Described 1) accidental conditions processing step
Open described high-pressure pump entrance automatic valve, UV sterilizer inlet valve, UV sterilizer flowing water Valve, reverse osmosis unit concentrated water discharge automatic valve, close described UV sterilizer bypass valve, the defective product water discharging valve of reverse osmosis unit door, start described high-pressure pump, described high-pressure pump outlet automatic valve is opened, and technical process this moment is: RO pre-processing device water → high-pressure pump → reverse osmosis unit → UV sterilizer → follow-up water treating equipment.
Described 2) system-down processing step
Close described high-pressure pump outlet automatic valve, close described high-pressure pump, close described high-pressure pump entrance automatic valve, UV sterilizer inlet valve, UV sterilizer flowing water Valve, reverse osmosis unit concentrated water discharge automatic valve, UV sterilizer bypass valve, the defective product water discharging valve of reverse osmosis unit door, system-down;
Described 3) damage processing step
Open described high-pressure pump entrance automatic valve, UV sterilizer bypass valve, reverse osmosis unit concentrated water discharge automatic valve, close described UV sterilizer inlet valve, UV sterilizer flowing water Valve, start described high-pressure pump, described high-pressure pump outlet automatic valve is opened, and technical process this moment is: RO pre-processing device water → high-pressure pump → reverse osmosis unit → follow-up water treating equipment;
Described 4) accidental conditions switches processing step to damage
On the accidental conditions basis, open described UV sterilizer bypass valve, close described UV sterilizer inlet valve, UV sterilizer flowing water Valve, all the other valves and equipment are failure to actuate, technical process this moment switches to damage from accidental conditions, uses when described UV sterilizer breaks down.
Described 5) defective product water discharging operating mode processing step
Move or the abnormal operation condition state normal:
When a. defective transient state appears in described reverse osmosis unit product water, open the defective product water discharging valve of described reverse osmosis unit door, all the other valves and equipment are failure to actuate, then defective product water discharges on the spot by the defective product water discharging valve of described reverse osmosis unit, until produce the hydration lattice or switch to system-down;
When b. described UV sterilizer produces the defective transient state of water, open the defective product water discharging valve of described UV sterilizer door, all the other valves and equipment are failure to actuate, then defective product water discharges on the spot by the defective product water discharging valve of described UV sterilizer door, until produce the hydration lattice or switch to system-down;
Described 6) reverse osmosis unit+UV sterilizer operation control processing step
Reverse osmosis unit for subsequent use is set or/and UV sterilizer, described reverse osmosis unit and described UV sterilizer are connected in series, out of service when described UV sterilizer fluorescent tube fault, be provided with ultraviolet equipment for subsequent use and then can put into operation this moment, and described UV sterilizer puts into operation again behind the replacing fluorescent tube.
The beneficial effect that the technical scheme that the embodiment of the invention provides is brought is:
The nuclear plant desalting water removing total organic carbon system that combines with disinfection by ultraviolet light by reverse osmosis, UV sterilizer performance maximum efficiency, for various water sources TOC situation, can realize that all gradient removes, so that the de-mineralized water treatment system strengthens the adaptability at water source, the TOC clearance is stable, guarantee de-mineralized water treatment system product water water quality TOC≤50ppb, reach the water quality requirement of AP1000 Nuclear power plants, be conducive to keep the steady running of Nuclear power plants therrmodynamic system, prolong the work-ing life of system.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention, the accompanying drawing of required use was done to introduce simply during the below will describe embodiment, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is system and the control method schematic diagram of a kind of nuclear plant desalting water system removing total organic carbon of providing of the embodiment of the invention.
Each symbolic representation implication is as follows among the figure:
1 high-pressure pump;
2 reverse osmosis units, 2-1 reverse osmosis unit water inlet, 2-2 sampling switch valve, 2-3 pressurized vessel;
3 UV sterilizers, 3-1 bypass water inlet, 3-2 UV sterilizer water inlet, 3-3 UV sterilizer water outlet, 3-4 bypass water outlet;
The 4RO pre-processing device, 4-1RO pre-processing device water outlet;
5 follow-up water treating equipment;
V1 high-pressure pump entrance automatic valve;
V2 high-pressure pump outlet non-return valve door;
V3 high-pressure pump outlet automatic valve;
V4 reverse osmosis unit outlet non-return valve door;
V5 UV sterilizer inlet valve;
V6 UV sterilizer flowing water Valve;
V7 UV sterilizer bypass valve;
V8 reverse osmosis unit concentrated water discharge check valve;
V9 reverse osmosis unit concentrated water discharge automatic valve;
The defective product water discharging valve of V10 reverse osmosis unit door;
The defective product water discharging valve of V11 UV sterilizer door;
The A DW system demineralized water system comes water lines, the branch road of B reverse osmosis working line, the dense water lines of C (shown in the dotted line), D reverse osmosis working line, the qualified product water of E outlet pipeline, the bypass of F UV sterilizer, the defective product water discharge spout of G UV sterilizer road, the defective product water discharge spout of H reverse osmosis unit road.
Large arrow is that de-mineralized water flows to (namely by the direction of de-mineralized water water inlet to the de-mineralized water water outlet);
Small arrow is that concentrated stream is to (being that dense water is by the direction of pressurized vessel water outlet to the concentrated water discharge water outlet).
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.
Embodiment one
Referring to shown in Figure 1, the embodiment of the invention provides a kind of system of nuclear plant desalting water system removing total organic carbon, by reverse osmosis (RO) and nuclear plant desalting water removing total organic carbon (TOC) system that combines of ultraviolet ray (hereinafter to be referred as UV) sterilization, TOC is formed gradient to be removed, namely, TOC a large amount of, higher molecular weight is at first removed by RO, TOC a small amount of, lower molecular weight is removed by UV, the assurance system produces water water quality TOC≤50ppb.Described system comprises at least: high-pressure pump 1, reverse osmosis unit 2, UV sterilizer 3 and associated pipe, by-pass valve control etc.; Described associated pipe comprises at least: DW system demineralized water system comes the branch road B of water lines A, reverse osmosis working line, dense water lines C, reverse osmosis working line D, qualified product water outlet pipeline E, the bypass F of UV sterilizer, the defective product water discharge spout road G of UV sterilizer, the defective product water discharge spout road H of reverse osmosis unit etc.; Described by-pass valve control comprises at least: high-pressure pump entrance automatic valve V1, high-pressure pump outlet non-return valve door V2, high-pressure pump outlet automatic valve V3, reverse osmosis unit outlet non-return valve door V4, UV sterilizer inlet valve V5, UV sterilizer flowing water Valve V6, UV sterilizer bypass valve V7, reverse osmosis unit concentrated water discharge check valve V8, reverse osmosis unit concentrated water discharge automatic valve V9, the defective product water discharging valve of reverse osmosis unit door V10, the defective product water discharging valve of UV sterilizer door V11 etc.; The existing installation that is associated with system of the present invention de-mineralized water entrance and outlet comprises at least: RO pre-processing device 4, follow-up water treating equipment 5 etc.
Particularly, described DW system demineralized water system comes water lines A to refer to by described RO pre-processing device water outlet 4-1 to the pipeline between the described reverse osmosis unit water inlet 2-1; The branch road B of described reverse osmosis working line refers to a pipeline connecting at described reverse osmosis working line D; Described dense water lines C refers to by the water outlet of the described pressurized vessel 2-3 pipeline that gives off the mouth of a river to dense water lines C; Described reverse osmosis working line D refers to by described reverse osmosis unit water inlet 2-1 to the pipeline between the UV sterilizer water inlet 3-2; Described qualified product water outlet pipeline E refers to by UV sterilizer water outlet 3-3 to the pipeline between the follow-up water treating equipment 5; The bypass F of described UV sterilizer refers to by bypass water inlet 3-1 to the pipeline between the bypass water outlet 3-4; The defective product water discharge spout road G of described UV sterilizer refers to a pipeline being connected between UV sterilizer water outlet 3-3 and bypass water outlet 3-4; The defective product water discharge spout road H of described reverse osmosis unit refers to the upper pipeline that connects of reverse osmosis working line D.
Particularly, as preferably, high-pressure pump 1 water outlet of described nuclear plant desalting water removing total organic carbon system comes water lines A to connect reverse osmosis unit 2 by DW system demineralized water system, and described reverse osmosis unit 2 is by reverse osmosis working line D connecting tube formula UV sterilizer 3; Described UV sterilizer 3 connects existing follow-up water treating equipment 5 by qualified product water outlet pipeline E; Described high-pressure pump 1 water-in comes water lines A to connect existing RO pre-processing device 4 by DW system demineralized water system, and described high-pressure pump 1 inlet water pressure is about 0.2～0.5MPa, and water temp is 10～25 ℃, and the inlet duct flow velocity is 0.5～1.5m/s; Consist of thus nuclear plant desalting water removing total organic carbon accidental conditions system, steady removal TOC.Because the degradation production of TOC only has CO
2And H
2O, wherein CO
2In follow-up water treating equipment 5, naturally overflow or by the removal of the equipment such as ion-exchange, can not exert an influence to water quality.Described reverse osmosis unit 2 is prior art, can select LG-DOW company product.
Particularly, described DW system demineralized water system comes to be provided with in turn on the water lines A high-pressure pump entrance automatic valve V1, high-pressure pump outlet non-return valve door V2, high-pressure pump outlet automatic valve V3, wherein, described high-pressure pump entrance automatic valve V1 is between RO pre-processing device water outlet 4-1 and high-pressure pump 1 water-in, described high-pressure pump outlet non-return valve door V2, high-pressure pump outlet automatic valve V3 are between high-pressure pump 1 water outlet and reverse osmosis unit water inlet 2-1, and described high-pressure pump outlet non-return valve door V2 is used for anti-sealing high-pressure pump stoppage in transit instantaneous water refluence impulse high voltage pump 1; Be parallel with several pressurized vessels 2-3, sampling switch valve 2-2 on the bypass B of described reverse osmosis working line and the described reverse osmosis working line D, described pressurized vessel 2-3 is corresponding one by one with sampling switch valve 2-2; The quantity of described pressurized vessel 2-3 is definite according to system's water yield processed, and described pressurized vessel 2-3 is prior art, is equiped with six membrane elements in each pressurized vessel 2-3, and the membrane element combination can be adopted one-part form or two-section type; The water outlet of described each pressurized vessel 2-3 connects described dense water lines C(to be seen among the figure shown in the dotted line); be provided with in turn reverse osmosis unit concentrated water discharge check valve V8, reverse osmosis unit concentrated water discharge automatic valve V9 on the end of described dense water lines C, described reverse osmosis unit concentrated water discharge check valve V8 is dense aqueous reflux destruction membrane element when being used for preventing from shutting down.
Particularly, be provided with in turn reverse osmosis unit outlet non-return valve door V4, UV sterilizer inlet valve V5 on the described reverse osmosis working line D, described reverse osmosis unit outlet non-return valve door V4 is positioned at the front end of bypass water inlet 3-1, the broken ring of aqueous reflux reverse-osmosis membrane element when being used for preventing from shutting down; Described UV sterilizer inlet valve V5 is positioned at the rear end of bypass water inlet 3-1; Be provided with UV sterilizer flowing water Valve V6 on the described qualified product water outlet pipeline E; Be provided with UV sterilizer bypass valve V7 on the bypass F of described UV sterilizer; Be provided with the defective product water discharging valve of UV sterilizer door V11 on the defective product water discharge spout road G of described UV sterilizer; Be provided with the defective product water discharging valve of reverse osmosis unit door V10 on the defective product water discharge spout road H of described reverse osmosis unit.
Described by-pass valve control V1-V11 can realize the comprehensive control to embodiment of the invention nuclear plant desalting water removing total organic carbon system; comprise that accidental conditions, system-down, damage, accidental conditions move control etc. to damage switching, defective product water discharging operating mode, RO+UV, keep the steady running of Nuclear power plants therrmodynamic system.
Particularly, described UV sterilizer 3 is prior art, can select Shandong Liangcheng Environment Protection Engineering Co., Ltd.'s product, and ultraviolet ray (UV) wavelength is 185nm; UV sterilizer 3 can adopt time variable control or manually control, and the housing of UV sterilizer 3 adopts stainless steel to make, and does polished finish, to improve ultraviolet utilization ratio.The UV sterilizer water inlet 3-2 of described UV sterilizer 3 connects the water outlet of described reverse osmosis working line D, and described UV sterilizer water outlet 3-3 connects the water inlet of qualified product water outlet pipeline E; Described bypass water inlet 3-1 and bypass water outlet 3-4 are connected on reverse osmosis working line D and the qualified product water outlet pipeline E.
In sum, the embodiment of the invention one adopts reverse osmosis unit 2 water outlets that UV sterilizer 3 is set and combines and consist of the nuclear plant desalting water removing total organic carbon system of RO+UV, to various water sources TOC situation, all can realize the gradient removal, so that the de-mineralized water treatment system is to the adaptability enhancing at water source.
Embodiment two
Referring to shown in Figure 2; the embodiment of the invention provides a kind of control method of system of nuclear plant desalting water system removing total organic carbon; comprise: 1) accidental conditions, 2) system-down, 3) damage, 4) accidental conditions to damage switch, 5) defective product water discharging operating mode, 6) processing step under the different operating modes such as RO+UV operation control, wherein
1) accidental conditions processing step
Open described high-pressure pump entrance automatic valve V1, UV sterilizer inlet valve V5, UV sterilizer flowing water Valve V6, reverse osmosis unit concentrated water discharge automatic valve V9, close described UV sterilizer bypass valve V7, the defective product water discharging valve of reverse osmosis unit door V10, start described high-pressure pump 1, high-pressure pump outlet automatic valve V3 opens, and this moment, the technical process of accidental conditions was: RO pre-processing device 4 waters → high-pressure pump 1 → reverse osmosis (RO) device 2 → ultraviolet ray (UV) sterilization equipment 3 → follow-up water treating equipment 5.
The principle of work of embodiment of the invention accidental conditions:
By RO+UV technical process normal operation input, reverse osmosis (RO) 2 pairs of total organic carbons of device (TOC) are preliminary to be removed, and removes simultaneously suspended substance, the colloid of impact ultraviolet ray (UV) effect, reaches the purpose that adapts to various source qualities; Then carry out high-intensity uviolizing by ultraviolet ray (UV) sterilization equipment 3, the better selection of ultraviolet wavelength 185nm, because shielding of ultraviolet penetrates or causes the suspended substance of ultraviolet scattering, colloid to be removed by RO, therefore the rate of decomposition of UV can be brought up to more than 99.9% on the basis of RO clearance, thereby guarantee de-mineralized water treatment system product water TOC≤50ppb, steady removal TOC.
2) system-down processing step
Close described high-pressure pump outlet automatic valve V3; close described high-pressure pump 1; close described high-pressure pump entrance automatic valve V1, UV sterilizer inlet valve V5, UV sterilizer flowing water Valve V6, reverse osmosis unit concentrated water discharge automatic valve V9, UV sterilizer bypass valve V7, the defective product water discharging valve of reverse osmosis unit door V10, at this moment system-down.
3) damage processing step
Open described high-pressure pump entrance automatic valve V1, UV sterilizer bypass valve V7, reverse osmosis unit concentrated water discharge automatic valve V9, close described UV sterilizer inlet valve V5, UV sterilizer flowing water Valve V6, start high-pressure pump 1, high-pressure pump outlet automatic valve V3 opens, technical process this moment is: RO pre-processing device 4 waters → high-pressure pump 1 → reverse osmosis (RO) device 2 → follow-up water treating equipment 5, this operating mode returns conventional water treatment process, use during lower or UV overhaul of the equipments at water source TOC content, but saves energy.
4) accidental conditions switches processing step to damage
On the accidental conditions basis, open described UV sterilizer bypass valve V7, close described UV sterilizer inlet valve V5, UV sterilizer flowing water Valve V6, all the other valves and equipment are failure to actuate, technical process this moment switches to damage from accidental conditions, uses when described ultraviolet ray (UV) sterilization equipment 3 breaks down suddenly.
5) defective product water discharging operating mode processing step
Move or the abnormal operation condition state normal:
When a. defective transient state appears in described reverse osmosis (RO) device 2 product water; open the defective product water discharging valve of described reverse osmosis unit door V10; all the other valves and equipment are failure to actuate; then defective product water discharges on the spot by the defective product water discharging valve of described reverse osmosis unit V10, until produce the hydration lattice or switch to system-down.
When b. described ultraviolet ray (UV) sterilization equipment 3 produces the defective transient state of water; open the defective product water discharging valve of described UV sterilizer door V11; all the other valves and equipment are failure to actuate; then defective product water discharges on the spot by the defective product water discharging valve of described UV sterilizer door V11, until produce the hydration lattice or switch to system-down.
6) reverse osmosis (RO) device+ultraviolet ray (UV) sterilization equipment operation control processing step
According to the concrete engineering practical situation, reverse osmosis for subsequent use (RO) device 2 can be set or/and ultraviolet ray (UV) sterilization equipment 3, described reverse osmosis (RO) device is connected in series with described ultraviolet ray (UV) sterilization equipment, out of service when described ultraviolet ray (UV) sterilization equipment 3 fluorescent tube fault, be provided with ultraviolet ray for subsequent use (UV) equipment and then can put into operation this moment, and described ultraviolet ray (UV) sterilization equipment 3 puts into operation again behind the replacing fluorescent tube.
In sum, the control method key of the embodiment of the invention two is the position of UV sterilizer 3 and the selection of ultraviolet ray (UV) wavelength.If UV sterilizer 3 is arranged on before the reverse osmosis unit 2, can be because suspended substance, colloid to ultraviolet interference, cause the UV sterilizing rate to reduce, the system effluent quality of causing does not reach requirement; If UV sterilizer 3 is arranged on after the follow-up water treating equipment 5, then can cause degradation production directly to enter therrmodynamic system, in a disguised form introduced impurity to therrmodynamic system.Usually sterilization is selected 284nm with ultraviolet wavelength, this wavelength can be to life entity deactivations such as bacteriums, but deactivated bacterium etc. are still TOC, do not remove, wavelength and quantity by choose reasonable UV fluorescent tube, guarantee suitable velocity of medium, make the de-mineralized water treatment system produce water directly with bacterium isoreactivity or nonactive organic substance decomposing, remove TOC.
The embodiment of the invention takes full advantage of existing installation, and by rational design technology, gradient is processed theory, has improved the nuclear power station secondary loop Steam-water Quality, guarantees that effectively Nuclear power plants is long-term, the high level operation, remarkable in economical benefits.
1) direct economic benefit
Adopt the de-mineralized water treatment system of RO+UV, its TOC of yielding water content is not affected by or not the water source, has avoided product water to waste owing to TOC is defective.According to 1 AP1000 nuclear power generating sets year operation 7000h, per hour consume de-mineralized water 70t meter, suppose to have the whole year time of 1/10th to be subjected to seasonal effect to cause water quality defective, then can waste 70t/h * 7000h/10=49000t de-mineralized water.After adopting the RO+UV system, then can avoid this partial loss, by 5 yuan/t of de-mineralized water water producing cost, annual 24.5 ten thousand yuan of the direct economic benefits that produce.
2) indirect economic effect
After adopting the RO+UV system, TOC content is extremely low in the de-mineralized water of supply AP1000 Nuclear power plants, and maximum possible has reduced TOC and decomposed the vapour generator corrosion that causes, thereby has prolonged power plant's phase in longevity; Avoided because the defective disorderly closedown that causes of water quality etc., these indirect economic effects can't be estimated.
3) water saving
Adopt the de-mineralized water treatment system of RO+UV to avoid the waste of product water, thereby saved getting water from water head site.
The invention described above embodiment sequence number does not represent the quality of embodiment just to description.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the system of a nuclear plant desalting water system removing total organic carbon, described system comprises at least: high-pressure pump (1), reverse osmosis unit (2), UV sterilizer (3) and associated pipe, by-pass valve control, it is characterized in that, described high-pressure pump (1) water outlet comes water lines (A) to connect described reverse osmosis unit (2) by DW system demineralized water system, and described reverse osmosis unit (2) connects described UV sterilizer (3) by reverse osmosis working line (D).
2. the system of nuclear plant desalting water system removing total organic carbon according to claim 1 is characterized in that, described UV sterilizer (3) connects follow-up water treating equipment (5) by qualified product water outlet pipeline (E); Described high-pressure pump (1) water-in comes water lines (A) to connect RO pre-processing device (4) by DW system demineralized water system.
3. the system of nuclear plant desalting water system removing total organic carbon according to claim 1, it is characterized in that, described associated pipe comprises at least: DW system demineralized water system comes bypass (F), the defective product water discharge spout of UV sterilizer road (G), the defective product water discharge spout of the reverse osmosis unit road (H) of the branch road (B) of water lines (A), reverse osmosis working line, dense water lines (C), reverse osmosis working line (D), qualified product water outlet pipeline (E), UV sterilizer; Described by-pass valve control comprises at least: high-pressure pump entrance automatic valve (V1), high-pressure pump outlet non-return valve door (V2), high-pressure pump outlet automatic valve (V3), reverse osmosis unit outlet non-return valve door (V4), UV sterilizer inlet valve (V5), UV sterilizer flowing water Valve (V6), UV sterilizer bypass valve (V7), reverse osmosis unit concentrated water discharge check valve (V8), reverse osmosis unit concentrated water discharge automatic valve (V9), the defective product water discharging valve of reverse osmosis unit door (V10), the defective product water discharging valve of UV sterilizer door (V11).
4. the system of nuclear plant desalting water system removing total organic carbon according to claim 3, it is characterized in that, described DW system demineralized water system comes water lines (A) to refer to by described RO pre-processing device water outlet (4-1) to the pipeline between the described reverse osmosis unit water inlet (2-1); The branch road of described reverse osmosis working line (B) refers to a pipeline in described reverse osmosis working line (D) connection; Described dense water lines (C) refers to by the water outlet of described pressurized vessel (2-3) pipeline that gives off the mouth of a river to described dense water lines (C); Described reverse osmosis working line (D) refers to by described reverse osmosis unit water inlet (2-1) to the pipeline between the UV sterilizer water inlet (3-2); Described qualified product water outlet pipeline (E) refers to by UV sterilizer water outlet (3-3) to the pipeline between the described follow-up water treating equipment (5); The bypass of described UV sterilizer (F) refers to by bypass water inlet (3-1) to the pipeline between the bypass water outlet (3-4); The defective product water discharge spout of described UV sterilizer road (G) refers to the pipeline that is connected between described UV sterilizer water outlet (3-3) and described bypass water outlet (3-4); The defective product water discharge spout of described reverse osmosis unit road (H) refers to the upper pipeline that connects of described reverse osmosis working line (D).
5. the system of nuclear plant desalting water system removing total organic carbon according to claim 3, it is characterized in that, described DW system demineralized water system comes to be provided with in turn on the water lines (A) described high-pressure pump entrance automatic valve (V1), high-pressure pump outlet non-return valve door (V2), high-pressure pump outlet automatic valve (V3), described high-pressure pump entrance automatic valve (V1) is positioned between described RO pre-processing device water outlet (4-1) and described high-pressure pump (1) water-in, described high-pressure pump outlet non-return valve door (V2), high-pressure pump outlet automatic valve (V3) is positioned between described high-pressure pump (1) water outlet and the described reverse osmosis unit water inlet (2-1); Be parallel with several pressurized vessels (2-3), sampling switch valve (2-2) on the bypass of described reverse osmosis working line (B) and the described reverse osmosis working line (D); The water outlet of described each pressurized vessel (2-3) connects described dense water lines (C), and the end of described dense water lines (C) is provided with described reverse osmosis unit concentrated water discharge check valve (V8), described reverse osmosis unit concentrated water discharge automatic valve (V9) in turn.
6. the system of nuclear plant desalting water system removing total organic carbon according to claim 3, it is characterized in that, be provided with in turn described reverse osmosis unit outlet non-return valve door (V4), UV sterilizer inlet valve (V5) on the described reverse osmosis working line (D), described reverse osmosis unit outlet non-return valve door (V4) is positioned at the front end of described bypass water inlet (3-1); Described UV sterilizer inlet valve (V5) is positioned at the rear end of described bypass water inlet (3-1); Be provided with described UV sterilizer flowing water Valve (V6) on the described qualified product water outlet pipeline (E); Be provided with described UV sterilizer bypass valve (V7) in the bypass of described UV sterilizer (F); Be provided with the defective product water discharging valve of described UV sterilizer door (V11) on the defective product water discharge spout of the described UV sterilizer road (G); Be provided with the defective product water discharging valve of described reverse osmosis unit door (V10) on the defective product water discharge spout of the described reverse osmosis unit road (H).
7. the system of nuclear plant desalting water system removing total organic carbon according to claim 1, it is characterized in that, the UV sterilizer water inlet (3-2) of described UV sterilizer (3) connects the water outlet of described reverse osmosis working line (D), and described UV sterilizer water outlet (3-3) connects the water inlet of described qualified product water outlet pipeline (E); Described bypass water inlet (3-1) and bypass water outlet (3-4) are connected on described reverse osmosis working line (D) and the described qualified product water outlet pipeline (E); The ultraviolet wavelength of described UV sterilizer (3) is 185nm.
8. the control method of the system of a nuclear plant desalting water system removing total organic carbon, it is characterized in that, described control method comprises: 1) accidental conditions, 2) system-down, 3) damage, 4) accidental conditions to damage switch, 5) defective product water discharging operating mode, 6) processing step under the different operating modes of RO+UV operation control; Wherein,
Described 1) accidental conditions processing step
Open described high-pressure pump entrance automatic valve (V1), UV sterilizer inlet valve (V5), UV sterilizer flowing water Valve (V6), reverse osmosis unit concentrated water discharge automatic valve (V9), close described UV sterilizer bypass valve (V7), the defective product water discharging valve of reverse osmosis unit door (V10), start described high-pressure pump (1), described high-pressure pump outlet automatic valve (V3) is opened, and technical process this moment is: RO pre-processing device (4) water → high-pressure pump (1) → reverse osmosis unit (2) → UV sterilizer (3) → follow-up water treating equipment (5).
9. the control method of the system of nuclear plant desalting water system removing total organic carbon according to claim 8 is characterized in that, described 2) and the system-down processing step
Close described high-pressure pump outlet automatic valve (V3), close described high-pressure pump (1), close described high-pressure pump entrance automatic valve (V1), UV sterilizer inlet valve (V5), UV sterilizer flowing water Valve (V6), reverse osmosis unit concentrated water discharge automatic valve (V9), UV sterilizer bypass valve (V7), the defective product water discharging valve of reverse osmosis unit door (V10), system-down;
Described 3) damage processing step
Open described high-pressure pump entrance automatic valve (V1), UV sterilizer bypass valve (V7), reverse osmosis unit concentrated water discharge automatic valve (V9), close described UV sterilizer inlet valve (V5), UV sterilizer flowing water Valve (V6), start described high-pressure pump (1), described high-pressure pump outlet automatic valve (V3) is opened, and technical process this moment is: RO pre-processing device (4) water → high-pressure pump (1) → reverse osmosis unit (2) → follow-up water treating equipment (5);
Described 4) accidental conditions switches processing step to damage
On the accidental conditions basis, open described UV sterilizer bypass valve (V7), close described UV sterilizer inlet valve (V5), UV sterilizer flowing water Valve (V6), all the other valves and equipment are failure to actuate, technical process this moment switches to damage from accidental conditions, uses when breaking down at described UV sterilizer (3).
10. the control method of the system of nuclear plant desalting water system removing total organic carbon according to claim 8 is characterized in that, described 5) and defective product water discharging operating mode processing step
Move or the abnormal operation condition state normal:
When a. defective transient state appears in described reverse osmosis unit (2) product water, open the defective product water discharging valve of described reverse osmosis unit door (V10), all the other valves and equipment are failure to actuate, then defective product water discharges on the spot by the defective product water discharging valve of described reverse osmosis unit (V10), until produce the hydration lattice or switch to system-down;
When b. described UV sterilizer (3) produces the defective transient state of water, open the defective product water discharging valve of described UV sterilizer door (V11), all the other valves and equipment are failure to actuate, then defective product water discharges on the spot by the defective product water discharging valve of described UV sterilizer door (V11), until produce the hydration lattice or switch to system-down;
Described 6) reverse osmosis unit+UV sterilizer operation control processing step
Reverse osmosis unit for subsequent use (2) is set or/and UV sterilizer (3), described reverse osmosis unit (2) and described UV sterilizer (3) are connected in series, out of service when described UV sterilizer (3) fluorescent tube fault, be provided with ultraviolet ray for subsequent use (UV) and then can put into operation this moment, and described UV sterilizer (3) puts into operation again behind the replacing fluorescent tube.
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| CN201310002504.2A CN103043839B (en) | 2013-01-05 | 2013-01-05 | System for removing total organic carbon for demineralization water system for nuclear power station and control method |
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| CN201310002504.2A CN103043839B (en) | 2013-01-05 | 2013-01-05 | System for removing total organic carbon for demineralization water system for nuclear power station and control method |
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| CN106163993A (en) * | 2014-03-31 | 2016-11-23 | 栗田工业株式会社 | The processing method of the water containing low-molecular-weight organic matter |
| CN109279679A (en) * | 2018-10-17 | 2019-01-29 | 天津宏捷安装工程有限公司 | Ultraviolet ray disinfector anti-impact protective device |
| CN114956257A (en) * | 2022-06-29 | 2022-08-30 | 华蓝设计（集团）有限公司 | Non-full flow pipeline system convenient to disinfect |
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| CN114956257A (en) * | 2022-06-29 | 2022-08-30 | 华蓝设计（集团）有限公司 | Non-full flow pipeline system convenient to disinfect |
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| Publication number | Publication date |
|---|---|
| CN103043839B (en) | 2014-08-20 |
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