CN206156907U - Sewage treatment system is arranged in thermal power plant's circulation - Google Patents

Sewage treatment system is arranged in thermal power plant's circulation Download PDF

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Publication number
CN206156907U
CN206156907U CN201621174504.6U CN201621174504U CN206156907U CN 206156907 U CN206156907 U CN 206156907U CN 201621174504 U CN201621174504 U CN 201621174504U CN 206156907 U CN206156907 U CN 206156907U
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China
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reverse osmosis
water
outlet
flocculation
treatment system
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CN201621174504.6U
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Inventor
吴峰
高凤良
范学文
王乐云
董杰东
赵洋
张新宁
杨文毅
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China Resources Power Heze Co Ltd
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China Resources Power Heze Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124Water desalination
    • Y02A20/131Reverse-osmosis

Abstract

The utility model discloses a sewage treatment system is arranged in thermal power plant's circulation, include the one -level flocculation and precipitation pond, two / tertiary flocculation and precipitation pond, filter equipment, reverse osmosis unit and the flocculation basin that connect gradually through the pipeline, reverse osmosis unit's entry linkage filter equipment's export, the entry linkage reverse osmosis unit's of flocculation basin dense water export. The utility model provides a sewage treatment system, handle the back through tertiary flocculation and precipitation, lime softens can get rid of 60%~70% sulfate radical, second grade flocculation and precipitation utilizes the flue gas to replace partial sodium carbonate, get rid of in hardness that reagent cost can practice thrift about 75% under the condition that the effect satisfies, can effectively get rid of the magnesium in the circulation sewer, the sulfate radical, the fluorine, the heavy metal, materials such as suspended solid, and behind filtration treatment, carry out desalination through one -level reverse osmosis unit and sea water reverse osmosis unit again, reduce the salt content in the circulation sewer, the problem of power plant waste water exists is solved, have important economic benefits and environmental benefit.

Description

A kind of circulating blowdown water treatment system
Technical field
The utility model is related to sewage treatment area, more particularly to a kind of circulating blowdown water treatment system.
Background technology
In the running of power plant, desulfurization wastewater is a kind of common waste water, generally comprises circulating sewage, desulfurization wastewater And high-salt sewage, in acidity, salt content is high, and suspension content is high, and hardness is high, and corrosivity is strong, and composition is multiple for the water quality of power plant effluent Miscellaneous, change of water quality is big, unprocessed directly to discharge, and needs to be separately provided system for treating wastewater from power plant.
Circulating sewage subject matter is that salt content is higher, if as circulating cooling make-up water, it is necessary to reduce its salt content.
In prior art, the process to circulating sewage, typically throwing in sodium carbonate by way of, the calcium that goes in eliminating water, Magnesium ion, also, due to containing substantial amounts of calcium ion in waste water, need to consume substantial amounts of sodium carbonate, cause processing cost very high.
Therefore, the processing cost of circulating sewage how is reduced, is the technology that those skilled in the art need to solve at present Problem.
Utility model content
The purpose of this utility model is to provide a kind of circulating blowdown water treatment system, can effectively reduce circulation Sulfate radical content in sewer, reduces the input amount of follow-up sodium carbonate, cost-effective.
For achieving the above object, the utility model provides following technical scheme:
A kind of circulating blowdown water treatment system, including the one-level flocculation sedimentation tank being sequentially connected by pipeline, two/ Three-level flocculation sedimentation tank, filter, reverse osmosis unit and flocculation basin;The entrance of the reverse osmosis unit connects the filtration The outlet of device;The entrance of the flocculation basin connects the concentrated water outlet of the reverse osmosis unit.
Preferably, the filter includes being sequentially connected by pipeline more medium filter, ozone high grade oxidation tower, Biological activated carbon filter, ultrafiltration apparatus, one-level nanofiltration device and two grades of nanofiltration devices, the entrance of the more medium filter and institute The outlet connection of two/three-level flocculation sedimentation tank is stated, the outlet of two grades of nanofiltration devices connects with the entrance of the reverse osmosis unit Connect.
Preferably, it is equipped with confession on the more medium filter, the biological activated carbon filter and the ultrafiltration apparatus Backwash waste flows back into the pipeline of two/three-level flocculation sedimentation tank.
Preferably, concentration basin is also associated with two/three-level flocculation sedimentation tank, the concentration basin takes off with wet method in power plant Sulphur system connects, and the precipitation of calcium carbonate in two/three-level flocculation sedimentation tank can be used in power plant after the concentration basin concentration described in In wet desulfurization system.
Preferably, the reverse osmosis unit includes first-stage reverse osmosis device, micro-filtration and sea-water reverse osmose apparatus;Institute The outlet for stating first-stage reverse osmosis device is connected with the entrance of the flocculation basin;The outlet of the flocculation basin and the micro-filtration Entrance connects, and the outlet of the micro-filtration is connected with the entrance of the sea-water reverse osmose apparatus;The sea-water reverse osmose apparatus Outlet be provided with pipeline for flowing to desulfurization wastewater treatment system for concentrated water and for flowing to fresh water synthesis for fresh water The pipeline of reclaiming system.
Preferably, the outlet of the first-stage reverse osmosis device is provided with for flowing to fresh water comprehensive recycling system for fresh water Pipeline;The outlet of the sea-water reverse osmose apparatus be provided with the pipeline for flowing to fresh water comprehensive recycling system for fresh water and In the pipeline that desulfurization wastewater treatment system is flowed to for concentrated water.
Preferably, the fresh water that the entrance of the first-stage reverse osmosis device is also associated with concentrating link for salt flows into the one-level The pipeline of reverse osmosis unit.
Preferably, lime adding apparatus are connected with the one-level flocculation sedimentation tank;In two/three-level flocculation sedimentation tank It is connected with flue gas adding apparatus and sodium carbonate adding apparatus.
Circulating blowdown water treatment system provided by the utility model, including the one-level being sequentially connected by pipeline Flocculation sedimentation tank, two/three-level flocculation sedimentation tank, filter, reverse osmosis unit and flocculation basin;The reverse osmosis unit enters The outlet of the mouth connection filter;The entrance of the flocculation basin connects the concentrated water outlet of the reverse osmosis unit.The thermoelectricity Factory's circulating sewage processing system, after the process of three-level flocculation sediment, lime softens the sulfate radical that can remove 60%~70%, Two grades of flocculation sediments replace partial sodium carbonate using flue gas, and reagent cost can be saved under conditions of hardness removal effect meets 75% or so, the materials such as magnesium, sulfate radical, fluorine, heavy metal, suspension in circulating sewage can be effectively removed, and filtering After process, then desalting processing is carried out through first-stage reverse osmosis device and sea-water reverse osmose apparatus, can effectively reduce circulating sewage In salt content, the sub-prime that waste water component is realized while the zero-emission for realizing water extracts and recycling, thoroughly solves The problem that power plant effluent is present, with important economic benefit and environmental benefit.
Description of the drawings
In order to be illustrated more clearly that the utility model embodiment or technical scheme of the prior art, below will be to embodiment Or the accompanying drawing to be used needed for description of the prior art is briefly described, it should be apparent that, drawings in the following description are only It is some embodiments of the present utility model, for those of ordinary skill in the art, in the premise for not paying creative work Under, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is a kind of structure of specific embodiment of circulating blowdown water treatment system provided by the utility model Schematic diagram.
Specific embodiment
Core of the present utility model is to provide a kind of circulating blowdown water treatment system, the circulating sewer Processing system can significantly reduce the sulfate radical content in circulating sewage, reduce the input amount of follow-up sodium carbonate, cost-effective.
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made The every other embodiment for being obtained, belongs to the scope of the utility model protection.
Fig. 1 is refer to, Fig. 1 is embodied as circulating blowdown water treatment system one kind provided by the utility model The structural representation of mode.
In this embodiment, circulating blowdown water treatment system includes that the one-level being sequentially connected by pipeline is flocculated Sedimentation basin, two/three-level flocculation sedimentation tank, filter, reverse osmosis unit and flocculation basin;The entrance of reverse osmosis unit (enters The mouth of a river) connection filter outlet (i.e. delivery port);The concentrated water outlet of the entrance connection reverse osmosis unit of flocculation basin.
Specifically, the outlet of one-level flocculation sedimentation tank is connected with the entrance of two/three-level flocculation sedimentation tank, the flocculation of two/three-level The outlet of sedimentation basin is connected with the entrance of filter, and the outlet of filter is connected with the entrance of reverse osmosis unit.
More specifically, lime adding apparatus are connected with one-level flocculation sedimentation tank, it is of course also possible to artificial directly to one-level Lime, lime is added to generate magnesium hydroxide, calcium sulfate with magnesium and sulfate radical reaction and sink as medicament is softened in flocculation sedimentation tank Form sediment, add Polyferric Sulfate to promote particulate matter precipitation, transport outward Jing after dehydration;Flue gas is connected with two/three-level flocculation sedimentation tank and adds dress Put and sodium carbonate adding apparatus, specifically, flue gas adding apparatus can be the pipeline for being connected with flue gas, and flue gas is Jing desulfurization Flue gas after process, the CO in flue gas2Precipitation of calcium carbonate is generated with calcium reaction, a small amount of sodium carbonate is to remove circulation blowdown Calcium in water, two/three-level flocculation precipitation reaction is carried out step by step in same sedimentation basin.
The circulating blowdown water treatment system, by softening in step of flocculation precipitation, to circulating sewage in one-level Middle feeding lime realizes the removal of the materials such as magnesium, sulfate radical, fluorine, heavy metal, reduces the content of sulfate radical in water;Two grades of flocculations Flue gas is added in precipitation, the dosage of sodium carbonate during follow-up three-level softens is reduced, reduces softening the operating cost of clarification unit.
Circulating sewage subject matter is that salt content is higher, if as circulating cooling make-up water, it is necessary to reduce its salt content, because Using reverse osmosis process as desalting technology in this system, reverse osmosis membrane apparatus effluent quality very well, is not only eliminated big absolutely Partial inorganic salts, also been removed all kinds of organic pollutions, colloid, silica, virus, bacterium etc., and to water in it is each Plant impurity and there is very high clearance, therefore reverse osmosis membrane effluent quality can reach high standard water water quality index, reverse osmosis membrane Water outlet is adapted to high-end water needs, improves the value of water resource.And reverse osmosis desalinization system design it is critical only that pre- place The selection of reason.Using reverse osmosis deaslination technique, it is necessary to first water is pre-processed, after the process of three-level flocculation sediment, stone Ash softens the sulfate radical that can remove 60%~70%, and two grades of flocculation sediments replace partial sodium carbonate, go in hardness using flue gas Reagent cost can save 75% or so under conditions of meeting except effect, can effectively remove magnesium in circulating sewage, sulfate radical, The materials such as fluorine, heavy metal, suspension, and after filtration treatment, then through first-stage reverse osmosis device and sea-water reverse osmose apparatus Desalting processing is carried out, the salt content in circulating sewage can be effectively reduced, waste water group is realized while the zero-emission for realizing water The sub-prime divided is extracted and recycling, thoroughly power plant effluent is solved the problems, such as, with important economic benefit and environment Benefit.
Further, filter includes more medium filter, ozone high grade oxidation tower, the biology being sequentially connected by pipeline Activated carbon filter, ultrafiltration apparatus, one-level nanofiltration device and two grades of nanofiltration devices, the entrance of more medium filter and two/three-level are wadded a quilt with cotton The outlet connection of solidifying sedimentation basin, the outlet of two grades of nanofiltration devices is connected with the entrance of reverse osmosis unit.
Specifically, the outlet of more medium filter is connected with the entrance of ozone high grade oxidation tower, ozone high grade oxidation tower Outlet is connected with the entrance of biological activated carbon filter, and the outlet of biological activated carbon filter is connected with the entrance of ultrafiltration apparatus, ultrafiltration The outlet of device is connected with the entrance of one-level nanofiltration device, and the outlet of one-level nanofiltration device and the entrance of two grades of nanofiltration devices connect Connect.
More specifically, it is equipped with for backwash waste stream on more medium filter, biological activated carbon filter and ultrafiltration apparatus It is back to the pipeline of two/three-level flocculation sedimentation tank.
Preferably, concentration basin is also associated with two/three-level flocculation sedimentation tank, concentration basin connects with wet desulfurization system in power plant Connect, can be used for after the concentration of the concentrated pond of the precipitation of calcium carbonate in two/three-level flocculation sedimentation tank in power plant in wet desulfurization system.
On the basis of above-mentioned any embodiment, reverse osmosis unit include first-stage reverse osmosis device, micro-filtration and Sea-water reverse osmose apparatus;The outlet of first-stage reverse osmosis device is connected with the entrance of flocculation basin;The outlet of flocculation basin and micro-filtration Entrance connection, the outlet of micro-filtration is connected with the entrance of sea-water reverse osmose apparatus;The outlet of sea-water reverse osmose apparatus is provided with For the pipeline of desulfurization wastewater treatment system being flowed to for concentrated water and for flowing to fresh water comprehensive recycling system for fresh water Pipeline.
Specifically, the outlet of first-stage reverse osmosis device is provided with the pipe for flowing to fresh water comprehensive recycling system for fresh water Road;The outlet of sea-water reverse osmose apparatus is provided with the pipeline for flowing to fresh water comprehensive recycling system for fresh water and for for dense Water flows to the pipeline of desulfurization wastewater treatment system.
Preferably, the fresh water that the entrance of first-stage reverse osmosis device is also associated with concentrating link for salt flows into first-stage reverse osmosis dress The pipeline put, to realize the resources circulation of whole power plant waste water processing system, realizes zero-emission, improves resource utilization.
Each embodiment is described by the way of progressive in this specification, and what each embodiment was stressed is and other The difference of embodiment, between each embodiment identical similar portion mutually referring to.
Circulating blowdown water treatment system provided by the utility model is described in detail above.Herein Apply specific case to be set forth principle of the present utility model and embodiment, the explanation of above example is only intended to Help understands method of the present utility model and its core concept.It should be pointed out that for those skilled in the art come Say, on the premise of without departing from the utility model principle, can also carry out some improvement and modification to the utility model, these change Enter and modification is also fallen in the utility model scope of the claims.

Claims (8)

1. a kind of circulating blowdown water treatment system, it is characterised in that include that the one-level being sequentially connected by pipeline is flocculated Sedimentation basin, two/three-level flocculation sedimentation tank, filter, reverse osmosis unit and flocculation basin;The entrance of the reverse osmosis unit connects Connect the outlet of the filter;The entrance of the flocculation basin connects the concentrated water outlet of the reverse osmosis unit.
2. circulating blowdown water treatment system according to claim 1, it is characterised in that the filter includes The more medium filter that is sequentially connected by pipeline, ozone high grade oxidation tower, biological activated carbon filter, ultrafiltration apparatus, one-level are received Filter device and two grades of nanofiltration devices, the entrance of the more medium filter is connected with the outlet of two/three-level flocculation sedimentation tank, The outlet of two grades of nanofiltration devices is connected with the entrance of the reverse osmosis unit.
3. circulating blowdown water treatment system according to claim 2, it is characterised in that the multi-medium filtering It is equipped with device, the biological activated carbon filter and the ultrafiltration apparatus and flows back into two/three-level flocculation for backwash waste The pipeline of sedimentation basin.
4. circulating blowdown water treatment system according to claim 1, it is characterised in that two/three-level flocculation Concentration basin is also associated with sedimentation basin, the concentration basin is connected with wet desulfurization system in power plant, two/three-level flocculation sediment Precipitation of calcium carbonate in pond can be used in power plant in wet desulfurization system after the concentration basin concentration described in.
5. circulating blowdown water treatment system according to claim 1, it is characterised in that the reverse osmosis unit bag Include first-stage reverse osmosis device, micro-filtration and sea-water reverse osmose apparatus;The outlet of the first-stage reverse osmosis device and the wadding The entrance connection in solidifying pond;The outlet of the flocculation basin is connected with the entrance of the micro-filtration, the outlet of the micro-filtration with The entrance connection of the sea-water reverse osmose apparatus;The outlet of the sea-water reverse osmose apparatus is provided with for flowing to desulfurization for concentrated water The pipeline of Waste Water Treatment and the pipeline for flowing to fresh water comprehensive recycling system for fresh water.
6. circulating blowdown water treatment system according to claim 5, it is characterised in that the first-stage reverse osmosis dress The outlet put is provided with the pipeline for flowing to fresh water comprehensive recycling system for fresh water;The outlet of the sea-water reverse osmose apparatus sets There is pipeline for flowing to fresh water comprehensive recycling system for fresh water and for flowing to desulfurization wastewater treatment system for concentrated water Pipeline.
7. circulating blowdown water treatment system according to claim 6, it is characterised in that the first-stage reverse osmosis dress The entrance put is also associated with the pipeline of the fresh water inflow first-stage reverse osmosis device that link is concentrated for salt.
8. the circulating blowdown water treatment system according to claim 1 to 7 any one, it is characterised in that described Lime adding apparatus are connected with one-level flocculation sedimentation tank;Flue gas is connected with two/three-level flocculation sedimentation tank and adds dress Put and sodium carbonate adding apparatus.
CN201621174504.6U 2016-11-02 2016-11-02 Sewage treatment system is arranged in thermal power plant's circulation Active CN206156907U (en)

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CN201621174504.6U CN206156907U (en) 2016-11-02 2016-11-02 Sewage treatment system is arranged in thermal power plant's circulation

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114394711A (en) * 2022-01-25 2022-04-26 国网河北省电力有限公司电力科学研究院 High-hardness industrial wastewater flue gas bicarbonate and lime coagulation treatment system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114394711A (en) * 2022-01-25 2022-04-26 国网河北省电力有限公司电力科学研究院 High-hardness industrial wastewater flue gas bicarbonate and lime coagulation treatment system

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