CN207108723U - A kind of zero-discharge treatment system of nuclear power plant evaporator sewer - Google Patents
A kind of zero-discharge treatment system of nuclear power plant evaporator sewer Download PDFInfo
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- CN207108723U CN207108723U CN201720812445.9U CN201720812445U CN207108723U CN 207108723 U CN207108723 U CN 207108723U CN 201720812445 U CN201720812445 U CN 201720812445U CN 207108723 U CN207108723 U CN 207108723U
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- sewer
- water
- heat exchanger
- nuclear power
- power plant
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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
Abstract
The utility model discloses a kind of zero-discharge treatment system of nuclear power plant evaporator sewer, including：(1) evaporator sewer filters out colloid and a small amount of organic matter by charcoal filter after heat exchanger cools, pressure-reducing valve depressurizes；(2) sewer is filtered out into suspension by cartridge filter；(3) by sewer by continuous electric desalination device or reverse osmosis unit, electrical conductivity can effectively be reduced, the product water after desalination reaches reuse water quality requirement by conductivity meter detection, passes through the direct recycling of product water recovery tube；(4) continuous electric desalination device or reverse osmosis concentrated water are handled by crystallizer, and magma discharge pipe separates out, and condensed water of the steam evaporated after heat exchanger cools down reaches pure water water quality requirement, directly pass through condensing hot air furnace pipe reuse；There is the advantages of rate of recovery is high, system energy consumption is low, operating cost is few using the utility model of above-mentioned technical proposal.
Description
Technical field
The present invention relates to field of waste water treatment, more particularly to a kind of zero-discharge treatment system of nuclear power plant evaporator sewer
And its processing method.
Background technology
Steam generator blowdown system is used to carry out continuously collection, purified treatment and recovery, and right to secondary side sewer
Steam generator secondary side water chemistry property is controlled.Nuclear power station steam generator blowdown main purpose is to remove in operation
The leakage of caused undesired impurities, wherein secondary circuit, the adding of secondary circuit water chemistry conditioning agent, prolonged metal erosion etc. are
The main source of undesired impurities.Major pollutants are sodium ion, chloride and sulfate.
Traditional steam generator blowdown system water treatment technology is desalination bed technique, by consider useless solid management,
The completions such as resin life, water quality index, set state remove the replacing of salt bed resin.Except salt bed takes up space greatly, and need regular
Resin is changed, consumes substantial amounts of resin, while produce spent resin.Inconvenience is brought for the management of nuclear power station, operation.Business Yunqi
Between except the resin replacement frequency of salt bed be：Cation bed is changed once for 3-6 months, and anion bed is changed once for 6-8 months.Resin replacement amount
1.5m3。
With the development of water technology, continuous electric desalination technology (abbreviation EDI) because have advanced detergent power and
Clean-up effect, it is widely used in every profession and trade.In domestic nuclear power plant, only the nuclear power station of AP1000 heap-type is sent out in steam
Take the lead in carrying out blowdown water process using EDI device in raw device drainage, be currently in the stage of building.But utilize EDI technologies
Recovery evaporator sewer produces substantial amounts of concentrate in desalting process.In general, concentrate caused by EDI accounts for
The 5~10% of raw water amount, reuse can not be carried out, it is necessary to discharge, cause the wasting of resources.
The content of the invention
The technical problem to be solved in the present invention is, for system footprint area in the prior art it is big, need to add it is a large amount of
The problems such as chemicals causes secondary pollution, quantity of solid waste is big, the system rate of recovery is not high, there is provided a kind of floor space is small, without
Chemicals is added, solid waste yield is few, and the rate of recovery can reach the zero-emission of 100% nuclear power plant evaporator sewer
Place's system and its processing method.
To achieve the above objectives, it is achieved through the following technical solutions：
A kind of zero-discharge treatment system of nuclear power plant evaporator sewer, including：Heat exchanger, pressure-reducing valve, activated carbon filtering
Device, cartridge filter, continuous electric desalination device, conductivity meter and crystallizer, and above-mentioned part can overall skid-mounted design at one
In prying body；
Heat exchanger entrance is connected with nuclear power plant evaporator waste, and heat exchanger exit connects with active carbon filter entrance
Connect, active carbon filter outlet be connected with the entrance of continuous electric desalination device or reverse osmosis unit, continuous electric desalination device or
The outlet of person's reverse osmosis unit discharge concentrated water is connected with crystallizer entrance, and continuous electric desalination device or reverse osmosis unit discharge are pure
The outlet of water is finally imported into makeup Water System by product water recovery tube and reclaimed, and the magma of crystallizer passes through magma discharge pipe
It is discharged into the next step.
Heat exchanger can use plate type heat exchanger or pipe heat exchanger, be used for reducing blowdown coolant-temperature gage with adapting to membrane module
Temperature.
Pressure-reducing valve is provided with the pipeline that heat exchanger exit is connected with active carbon filter entrance, for reducing system pressure
Pressure is used to adapt to membrane module.
Continuous electric desalination device replaces with reverse osmosis unit, effectively reduces electrical conductivity, and sewer is reached pure water water quality will
Ask, directly recovery enters water supply system and reused.
A kind of Zero discharge treatment method of nuclear power plant evaporator sewer, comprises the following steps：
Step 1：By nuclear power plant evaporator sewer after cooling, being depressured by charcoal filter, filter out colloid and
Micro-content organism；
Step 2：Evaporator sewer after step 1 is handled filters out suspension by cartridge filter；
Step 3：Evaporator sewer after step 2 is handled by continuous electric desalination device or reverse osmosis unit,
Electrical conductivity can be effectively reduced, sewer is reached pure water water quality requirement, directly recovery enters water supply system and reused；
Step 4：The concentrated water that continuous electric desalination device in step 3 or reverse osmosis unit are discharged by crystallizer at
Reason, salinity crystallization separate out, and the water evaporated reaches pure water water quality requirement, is directly used in evaporator makeup Water System reuse；
Further, the continuous electric desalination device or reverse osmosis unit in step 3, its concentrated water partial discharge to step four
In crystallizer, product water as evaporator feed Water Sproading.
Further, the crystallizer in step 4, using evaporating, concentrating and crystallizing, wherein power steam can use evaporator
Steam, the steam of evaporation deliver to condenser and condense to form distillate most Zhongdao evaporator makeup Water System reuse, concentrate discharge
Solidification.
Further, conductivity meter is set on continuous electric desalination device inlet pipeline, is meeting the water inlet of continuous electric desalination device
On the premise of electrical conductivity requirement, concentrate recirculation ratio is controlled, the control system rate of recovery is between 90-95%.
It is of the invention compared with existing desalination bed technique and EDI technologies, there is advantages below and high-lighting effect：With except salt bed
Technology is different, the active carbon filter of equipment that is related in inner technology proposed by the invention, cartridge filter, demineralizer,
Crystallizer, it can be integrated in a pry bracket, the occupation area of equipment after integrating is the 1/2-1/3 except salt bed；Secondly, the system
Any chemical agent need not be added in the process of running；Colloidal impurity amount is very low in evaporator sewer, is practically free of in addition
Solid suspension, therefore the service life of active carbon filter and cartridge filter is grown, hardly with replacing consumptive material；This set technology
The middle demineralizer used is continuous electric desalination device and reverse osmosis unit, and service life can reach 3-5 under this operating mode
Year, so, the system quantity of solid waste is considerably less.
Compared with single EDI process systems, its present invention realizes the reuse of water resource 100%, has saved water resource.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of specification, and in order to allow the above and other objects, features and advantages of the present invention can
Become apparent, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, describe in detail as follows.
Brief description of the drawings
Totally 1 width accompanying drawing of the invention, wherein：
Fig. 1 is the process chart of the present invention.
In figure：1st, heat exchanger, 2, pressure-reducing valve, 3, active carbon filter, 4, cartridge filter, 5, continuous electric desalination device,
6th, conductivity meter, 7, product water recovery tube, 8, crystallizer, 9, magma discharge pipe, 10, second level heat exchanger, 11, condensed water returns
Closed tube.
Embodiment
A kind of zero-discharge treatment system of nuclear power plant evaporator sewer as shown in Figure 1, including：Heat exchanger 1, pressure-reducing valve
2nd, active carbon filter 3, cartridge filter 4, continuous electric desalination device, conductivity meter 6 and crystallizer 8, and above-mentioned part can be whole
Body skid is designed in a prying body；
The entrance of heat exchanger 1 is connected with nuclear power plant evaporator waste, the outlet of heat exchanger 1 and the entrance of active carbon filter 3
Connection, the outlet of active carbon filter 3 are connected with the entrance of continuous electric desalination device or reverse osmosis unit, continuous electric desalination device
Or the outlet of reverse osmosis unit discharge concentrated water is connected with the entrance of crystallizer 8, continuous electric desalination device or reverse osmosis unit row
The outlet for putting pure water is finally imported into makeup Water System by product water recovery tube 7 and reclaimed, and the magma of crystallizer 8 passes through magma
Discharge pipe 9 is discharged into the next step.
Heat exchanger 1 can use plate type heat exchanger or pipe heat exchanger.
Heat exchanger 1 exports and is provided with pressure-reducing valve 2 on the pipeline being connected with the entrance of active carbon filter 3.
Continuous electric desalination device can be replaced reverse osmosis unit.
A kind of zero-emission prescription method of nuclear power plant evaporator sewer：
(1) certain nuclear power plant evaporator sewer, after testing, the pollutant of described evaporator sewer include NaCl,
Na2SO4、SiO2, micro TOC etc., wherein total electrical conductivity is less than 40 μ s/cm (including CO2), SiO2Mass concentration is
125ppb。
(2) the evaporator sewer described in step (1) is sequentially entered into heat exchanger 1 to cool, can met follow-up
The temperature requirement of process treatment device；Sewage after cooling after pressure-reducing valve 2 by active carbon filter 3, filter out colloid and
A small amount of organic matter；Then, by cartridge filter 4, suspension is further filtered out, to meet requirement of the subsequent handling to water inlet；
Sewer after previous processed by continuous electric desalination device (or reverse osmosis unit) 5, filter out in sewage 99.8% with
On sodium chloride, sodium sulphate, residual Si O2Deng pollutant, product water by conductivity meter 6 detect it is qualified after by product water return
Closed tube 7 is emitted into evaporator makeup Water System, and product water conductivity is less than 0.1 μ s/cm, and strong brine is discharged into follow up device progress
Processing, the system rate of recovery between 90-95%,
(3) step (2) is led to 8% or so the strong brine that continuous electric desalination device or reverse osmosis unit 5 discharge
Crystallizer 8 is crossed, to realize sodium chloride, the crystallization of sodium sulphate and reclamation of condensate water.Strong brine utilizes evaporation in crystallizer 8
Steam caused by device heats to strong brine, realizes evaporative crystallization, discharges magma using magma discharge pipe 9, is gone as harmless rubbish
Landfill disposal；Steam caused by evaporation enters second level heat exchanger 10, is cooled using cooling water, the condensed water after cooling leads to
Cross condensed water recovery tube 11 and be recovered to evaporator makeup Water System reuse.
The above described is only a preferred embodiment of the present invention, any formal limitation not is made to the present invention, though
So the present invention is disclosed above with preferred embodiment, but is not limited to the present invention, any to be familiar with this professional technology people
Member without departing from the scope of the present invention, when the technology contents using the disclosure above make it is a little change or be modified to
The equivalent embodiment of equivalent variations, as long as being the content without departing from technical solution of the present invention, the technical spirit pair according to the present invention
Any simple modification, equivalent change and modification made for any of the above embodiments, in the range of still falling within technical solution of the present invention.
Claims (4)
- A kind of 1. zero-discharge treatment system of nuclear power plant evaporator sewer, it is characterised in that including：Heat exchanger (1), pressure-reducing valve (2), active carbon filter (3), cartridge filter (4), continuous electric desalination device, conductivity meter (6) and crystallizer (8), and on State part can overall skid-mounted design in a prying body；Heat exchanger (1) entrance is connected with nuclear power plant evaporator waste, and heat exchanger (1) outlet enters with active carbon filter (3) Mouth connection, active carbon filter (3) outlet are connected with the entrance of continuous electric desalination device or reverse osmosis unit, continuous electric desalination The outlet of device or reverse osmosis unit discharge concentrated water is connected with crystallizer (8) entrance, continuous electric desalination device or counter-infiltration The outlet of device discharge pure water is finally imported into makeup Water System by product water recovery tube (7) reclaims, the crystalline substance of crystallizer (8) Slurry is discharged into the next step by magma discharge pipe (9).
- A kind of 2. zero-discharge treatment system of nuclear power plant evaporator sewer as claimed in claim 1, it is characterised in that：Heat exchange Device (1) uses plate type heat exchanger or pipe heat exchanger.
- A kind of 3. zero-discharge treatment system of nuclear power plant evaporator sewer as claimed in claim 1, it is characterised in that：Heat exchange Pressure-reducing valve (2) is provided with the pipeline that device (1) outlet is connected with active carbon filter (3) entrance.
- A kind of 4. zero-discharge treatment system of nuclear power plant evaporator sewer as claimed in claim 1, it is characterised in that：Continuously Electric demineralizer replaces with reverse osmosis unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720812445.9U CN207108723U (en) | 2017-07-06 | 2017-07-06 | A kind of zero-discharge treatment system of nuclear power plant evaporator sewer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720812445.9U CN207108723U (en) | 2017-07-06 | 2017-07-06 | A kind of zero-discharge treatment system of nuclear power plant evaporator sewer |
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| CN207108723U true CN207108723U (en) | 2018-03-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107140779A (en) * | 2017-07-06 | 2017-09-08 | 重集团大连工程技术有限公司 | The zero-discharge treatment system and its processing method of a kind of nuclear power plant evaporator sewer |
| CN111777237A (en) * | 2020-07-10 | 2020-10-16 | 三门核电有限公司 | Purification method for nuclear power plant evaporator sewage discharge system |
-
2017
- 2017-07-06 CN CN201720812445.9U patent/CN207108723U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107140779A (en) * | 2017-07-06 | 2017-09-08 | 重集团大连工程技术有限公司 | The zero-discharge treatment system and its processing method of a kind of nuclear power plant evaporator sewer |
| CN111777237A (en) * | 2020-07-10 | 2020-10-16 | 三门核电有限公司 | Purification method for nuclear power plant evaporator sewage discharge system |
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