CN103043839B - 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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- CN103043839B CN103043839B CN201310002504.2A CN201310002504A CN103043839B CN 103043839 B CN103043839 B CN 103043839B CN 201310002504 A CN201310002504 A CN 201310002504A CN 103043839 B CN103043839 B CN 103043839B
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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
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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, the dissolved salt in the clear water after former water pretreatment is removed in combination by distillation, reverse osmosis, ion-exchange or these methods, obtain one-level de-mineralized water, then one-level de-mineralized water is met the de-mineralized water of unit requirement by mixed bed.The content of organic substance in water, represents with the amount of the principal element-carbon in organism, is called total organic carbon (hereinafter to be referred as TOC).
AP1000 described in literary composition is a kind of advanced person's non-active compressed water reactor nuclear power technology (hereinafter to be referred as AP1000), in the equipment of " reactor ", there is fission and produce a large amount of heat energy in the nuclear fuel that adopts uranium to make, use again the water under high pressure that heat energy is taken out of, in vapour generator, produce steam, Steam Actuation steam turbine is with generator together rotary electrification.
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.De-mineralized water treatment system is produced water Water Quality Control Indexes and is mainly contained conductance, silicate content, TOC etc., and wherein the control difference of TOC in core, lighter group is very large.AP1000 Nuclear power plants is to the control of TOC index in de-mineralized water far away higher than fired power generating unit, and wherein AP1000 requires TOC≤50ppb, and thermal power plant's high pressure unit requires TOC≤500ppb and only monitoring where necessary.This has just proposed requirements at the higher level to nuclear plant desalting water treatment process design.
In realizing process of the present invention, contriver finds that prior art at least exists following problem:
1, de-mineralized water treatment system product water TOC content is limited by source quality
The de-mineralized water treatment system main technique of the 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 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 TOC content in water source to maintain 5ppm, be limited by water source situation, cannot solve by existing technique, in nuclear power plant construction, be almost 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 the TOC clearance that adopts reverse osmosis+ion exchange desalting method to form difference is different, if the ratio that in TOC, larger molecular organics accounts for is higher, clearance is higher, otherwise clearance is lower, 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 present invention provides a kind of system and control method of nuclear plant desalting water system removing total organic carbon.Improve the adaptability of de-mineralized water treatment system to source quality, TOC clearance is stable, is conducive to maintain 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 at least comprises: 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 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 RO pre-processing device by DW system demineralized water system.
Particularly, described associated pipe at least comprises: 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 at least comprises: 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 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 the pipeline that gives off the mouth of a river to described dense water lines by the water outlet of described pressurized vessel; Described reverse osmosis working line refers to by described reverse osmosis unit water inlet to the pipeline between UV sterilizer water inlet; Described qualified product water outlet pipeline refers to by UV sterilizer water outlet to the pipeline between described follow-up water treating equipment; The bypass of described UV sterilizer refers to by bypass water inlet to the pipeline between bypass water outlet; The defective product water discharge spout of described UV sterilizer road refers to the pipeline being 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 connecting on described reverse osmosis working line.
Particularly, described DW system demineralized water system comes to be provided with in turn in 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; On the branch road of described reverse osmosis working line and described reverse osmosis working line, be parallel with several pressurized vessels, sampling switch valve; 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 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; On described qualified product water outlet pipeline, be provided with described UV sterilizer flowing water Valve; In the bypass of described UV sterilizer, be provided with described UV sterilizer bypass valve; On the defective product water discharge spout of described UV sterilizer road, be provided with the defective product water discharging valve of described UV sterilizer door; On the defective product water discharge spout of described reverse osmosis unit road, be provided with the defective product water discharging valve of described reverse osmosis unit door.
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 described qualified product water outlet pipeline; The ultraviolet wavelength of described UV sterilizer is 185nm.
On the other hand, the control method that a kind of nuclear plant desalting water removing total organic carbon system is provided, described control method comprises: 1) accidental conditions, 2) system-down, 3) damage, 4) accidental conditions to damage switch, 5) defective product water discharge operating mode, 6) RO+UV operation controls the processing step under different operating modes; 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 now technical process 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 now technical process 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 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, now technical process switches to damage from accidental conditions, when described UV sterilizer breaks down, uses.
Described 5) defective product water discharge operating mode processing step
Normal, move or abnormal operation condition state:
When there is defective transient state in described reverse osmosis unit product water a., open the defective product water discharging valve of described reverse osmosis unit door, all the other valves and equipment are failure to actuate, defective product water discharges on the spot by the defective product water discharging valve of described reverse osmosis unit, until produce 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, defective product water discharges on the spot by the defective product water discharging valve of described UV sterilizer door, until produce hydration lattice or switch to system-down;
Described 6) processing step is controlled in the operation of reverse osmosis unit+UV sterilizer
Standby reverse osmosis unit 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, now be provided with standby ultraviolet equipment and can put into operation, after replacing fluorescent tube, described UV sterilizer puts into operation again.
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:
The nuclear plant desalting water removing total organic carbon system combining with disinfection by ultraviolet light by reverse osmosis, UV sterilizer performance maximum efficiency, for various water sources TOC situation, all can realize gradient and remove, de-mineralized water treatment system is strengthened the adaptability at water source, 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 maintain the steady running of Nuclear power plants therrmodynamic system, extend the work-ing life of system.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, 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 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 present invention.
In figure, each symbol represents that implication is as follows:
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;
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;
A DW system demineralized water system carrys out water lines, the branch road of B reverse osmosis working line, the dense water lines of C (shown in 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 (i.e. the direction to de-mineralized water water outlet by de-mineralized water water inlet);
Small arrow is concentrated stream to (be dense water by pressurized vessel water outlet the direction to concentrated water discharge water outlet).
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Embodiment mono-
Shown in Figure 1, the embodiment of the present invention provides a kind of system of nuclear plant desalting water system removing total organic carbon, nuclear plant desalting water removing total organic carbon (TOC) system combining with ultraviolet ray (hereinafter to be referred as UV) sterilization by reverse osmosis (RO), TOC is formed to gradient to be removed,, first TOC a large amount of, higher molecular weight are removed by RO, TOC a small amount of, lower molecular weight is removed by UV, assurance system is produced water water quality TOC≤50ppb.Described system at least comprises: high-pressure pump 1, reverse osmosis unit 2, UV sterilizer 3 and associated pipe, by-pass valve control etc., described associated pipe at least comprises: 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 at least comprises: 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 being associated with system de-mineralized water entrance of the present invention and outlet at least comprises: 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 described reverse osmosis unit water inlet 2-1; The branch road B of described reverse osmosis working line refers to the pipeline connecting on described reverse osmosis working line D; Described dense water lines C refers to the pipeline that gives off the mouth of a river to dense water lines C by the water outlet of described pressurized vessel 2-3; Described reverse osmosis working line D refers to by described reverse osmosis unit water inlet 2-1 to the pipeline between 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 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 bypass water outlet 3-4; The defective product water discharge spout road G of described UV sterilizer refers to the 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 connecting 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 inlet duct flow velocity is 0.5～1.5m/s; Form 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 remove by equipment such as ion-exchanges, 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 on water lines A to be provided with in turn high-pressure pump entrance automatic valve V1, high-pressure pump outlet non-return valve door V2, high-pressure pump exports 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 for anti-sealing high-pressure pump stoppage in transit instantaneous water refluence impulse high voltage pump 1; On the bypass B of described reverse osmosis working line and described reverse osmosis working line D, be parallel with several pressurized vessels 2-3, sampling switch valve 2-2, 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 the system 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 membrane element combination can adopt 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 in figure shown in dotted line); on the end of described dense water lines C, be provided with in turn reverse osmosis unit concentrated water discharge check valve V8, reverse osmosis unit concentrated water discharge automatic valve V9, described reverse osmosis unit concentrated water discharge check valve V8 is dense aqueous reflux destruction membrane element while being used for preventing from shutting down.
Particularly, on described reverse osmosis working line D, be provided with in turn reverse osmosis unit outlet non-return valve door V4, UV sterilizer inlet valve V5, 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 preventing from shutting down; Described UV sterilizer inlet valve V5 is positioned at the rear end of bypass water inlet 3-1; On described qualified product water outlet pipeline E, be provided with UV sterilizer flowing water Valve V6; On the bypass F of described UV sterilizer, be provided with UV sterilizer bypass valve V7; On the defective product water discharge spout road G 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 H of described reverse osmosis unit, be provided with the defective product water discharging valve of reverse osmosis unit door V10.
Described by-pass valve control V1-V11 can realize the comprehensive control to embodiment of the present invention nuclear plant desalting water removing total organic carbon system; comprise that accidental conditions, system-down, damage, accidental conditions, to damage switching, defective product water discharge operating mode, RO+UV operation control etc., maintain 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 qualified product water outlet pipeline E.
In sum, the embodiment of the present invention one adopts reverse osmosis unit 2 water outlets that UV sterilizer 3 is set and combines and form the nuclear plant desalting water removing total organic carbon system of RO+UV, to various water sources TOC situation, all can realize gradient and remove, de-mineralized water treatment system is strengthened the adaptability at water source.
Embodiment bis-
Shown in Figure 2; the embodiment of the present 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 discharge 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 the now technical process of accidental conditions is: 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 present invention accidental conditions:
By RO+UV technical process normal operation input, reverse osmosis (RO) 2 pairs of total organic carbons of device (TOC) are tentatively removed, and remove suspended substance, the colloid of impact ultraviolet ray (UV) effect simultaneously, reach the object that adapts to various source qualities; Then by ultraviolet ray (UV) sterilization equipment 3, carry out high-intensity uviolizing, the better selection of ultraviolet wavelength 185nm, because penetrating or cause the suspended substance of ultraviolet scattering, colloid, by RO, removed shielding of ultraviolet, 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, now 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, now technical process 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, at water source TOC content, use during lower or UV overhaul of the equipments, can saves energy.
4) accidental conditions switches processing step to damage
On 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, now technical process switches to damage from accidental conditions, when described ultraviolet ray (UV) sterilization equipment 3 breaks down suddenly, uses.
5) defective product water discharge operating mode processing step
Normal, move or abnormal operation condition state:
When there is defective transient state in described reverse osmosis (RO) device 2 product water a.; open the defective product water discharging valve of described reverse osmosis unit door V10; all the other valves and equipment are failure to actuate; defective product water discharges on the spot by the defective product water discharging valve of described reverse osmosis unit V10, until produce 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; defective product water discharges on the spot by the defective product water discharging valve of described UV sterilizer door V11, until produce hydration lattice or switch to system-down.
6) processing step is controlled in the operation of reverse osmosis (RO) device+ultraviolet ray (UV) sterilization equipment
According to concrete engineering practical situation, standby reverse osmosis (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, now be provided with standby ultraviolet ray (UV) equipment and can put into operation, after replacing fluorescent tube, described ultraviolet ray (UV) sterilization equipment 3 puts into operation again.
In sum, the control method key of the embodiment of the present invention two is the position of UV sterilizer 3 and the selection of ultraviolet ray (UV) wavelength.If before UV sterilizer 3 is arranged on to reverse osmosis unit 2, can cause UV sterilizing rate to reduce because suspended substance, colloid are to ultraviolet interference, the system effluent quality of causing does not reach requirement; If after UV sterilizer 3 is arranged on to follow-up water treating equipment 5, can cause degradation production directly to enter therrmodynamic system, in a disguised form introduce impurity to therrmodynamic system.Conventionally sterilization is selected 284nm by ultraviolet wavelength, this wavelength can be to life entity deactivations such as bacteriums, but deactivated bacterium etc. are still TOC, do not remove, by wavelength and the quantity of choose reasonable UV fluorescent tube, guarantee suitable velocity of medium, make de-mineralized water treatment system produce water directly by bacterium isoreactivity or nonactive organic substance decomposing, remove TOC.
The embodiment of the present invention makes full use of existing installation, and by rational design technology, gradient is processed theory, has improved nuclear power station secondary loop Steam-water Quality, effectively guarantees that Nuclear power plants is long-term, high level operation, remarkable in economical benefits.
1) direct economic benefit
The de-mineralized water treatment system that adopts RO+UV, its TOC of yielding water content is not affected by or not water source, has avoided product water to waste because TOC is defective.According to the operation of 1 AP1000 nuclear power generating sets year 7000h, consumption de-mineralized water 70t per hour meter, suppose to have the whole year time of 1/10th to be subject to seasonal effect to cause water quality defective, can waste 70t/h * 7000h/10=49000t de-mineralized water.Adopt after RO+UV system, can avoid this partial loss, by 5 yuan/t of de-mineralized water water producing cost, produce every year 24.5 ten thousand yuan of direct economic benefits.
2) indirect economic effect
Adopt after RO+UV system, in the de-mineralized water of supply AP1000 Nuclear power plants, TOC content is extremely low, and maximum possible has reduced TOC and decomposed the vapour generator corrosion causing, thereby has extended power plant's phase in longevity; Avoided disorderly closedown causing because water quality is defective etc., these indirect economic effects cannot 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, just to describing, does not represent the quality of embodiment.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (5)
1. the system of a nuclear plant desalting water system removing total organic carbon, described system at least comprises: 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); The UV sterilizer water inlet (3-2) of described UV sterilizer (3) connects the water outlet of described reverse osmosis working line (D), and UV sterilizer water outlet (3-3) connects the water inlet of qualified product water outlet pipeline (E); Bypass water inlet (3-1) and bypass water outlet (3-4) are connected on described reverse osmosis working line (D) and qualified product water outlet pipeline (E);
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;
Described associated pipe at least comprises: 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 at least comprises: 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),
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 described reverse osmosis unit water inlet (2-1); The branch road of described reverse osmosis working line (B) refers at the upper pipeline connecting of described reverse osmosis working line (D); Described dense water lines (C) refers to the pipeline that gives off the mouth of a river to described dense water lines (C) by the water outlet of pressurized vessel (2-3); Described reverse osmosis working line (D) refers to by described reverse osmosis unit water inlet (2-1) to the pipeline between 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 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 bypass water outlet (3-4); The defective product water discharge spout of described UV sterilizer road (G) refers to the pipeline being 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 connecting of described reverse osmosis working line (D);
Described DW system demineralized water system comes to be provided with in turn in 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, and described high-pressure pump outlet non-return valve door (V2), high-pressure pump outlet automatic valve (V3) are positioned between described high-pressure pump (1) water outlet and described reverse osmosis unit water inlet (2-1); On the branch road of described reverse osmosis working line (B) and described reverse osmosis working line (D), be parallel with several pressurized vessels (2-3), sampling switch valve (2-2); The water outlet of 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;
On described reverse osmosis working line (D), be provided with in turn described reverse osmosis unit outlet non-return valve door (V4), UV sterilizer inlet valve (V5), 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); On described qualified product water outlet pipeline (E), be provided with described UV sterilizer flowing water Valve (V6); In the bypass of described UV sterilizer (F), be provided with described UV sterilizer bypass valve (V7); On the defective product water discharge spout of described UV sterilizer road (G), be provided with the defective product water discharging valve of described UV sterilizer door (V11); On the defective product water discharge spout of described reverse osmosis unit road (H), be provided with the defective product water discharging valve of described reverse osmosis unit door (V10).
2. the system of nuclear plant desalting water system removing total organic carbon according to claim 1, is characterized in that, the ultraviolet wavelength of described UV sterilizer (3) is 185nm.
3. the system of nuclear plant desalting water system removing total organic carbon according to claim 1, this system at least comprises: high-pressure pump (1), reverse osmosis unit (2), UV sterilizer (3) and associated pipe, by-pass valve control, described by-pass valve control at least comprises: 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), it is characterized in that, the control method of the system of this nuclear plant desalting water system removing total organic carbon comprises: 1) accidental conditions, 2) system-down, 3) damage, 4) accidental conditions to damage switch, 5) defective product water discharge operating mode, 6) RO+UV operation controls the processing step under different operating modes, 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, now technical process is: RO pre-processing device (4) water → high-pressure pump (1) → reverse osmosis unit (2) → UV sterilizer (3) → follow-up water treating equipment (5).
4. the control method of the system of nuclear plant desalting water system removing total organic carbon according to claim 3, is characterized in that,
Described 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), 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 now technical process 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 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, now technical process switches to damage from accidental conditions, when described UV sterilizer (3) breaks down, uses.
5. the control method of the system of nuclear plant desalting water system removing total organic carbon according to claim 3, is characterized in that,
Described 5) defective product water discharge operating mode processing step
Normal, move or abnormal operation condition state:
When there is defective transient state in described reverse osmosis unit (2) product water a., open the defective product water discharging valve of described reverse osmosis unit door (V10), all the other valves and equipment are failure to actuate, defective product water discharges on the spot by the defective product water discharging valve of described reverse osmosis unit (V10), until produce 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, defective product water discharges on the spot by the defective product water discharging valve of described UV sterilizer door (V11), until produce hydration lattice or switch to system-down;
Described 6) processing step is controlled in the operation of reverse osmosis unit+UV sterilizer
Standby reverse osmosis unit (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, now be provided with standby ultraviolet ray (UV) and can put into operation, after replacing fluorescent tube, described UV sterilizer (3) puts into operation again.
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| JP5900527B2 (en) * | 2014-03-31 | 2016-04-06 | 栗田工業株式会社 | Treatment method for water containing low molecular weight organic substances |
| 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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