CN206437968U - A kind of system of high-salt wastewater treatment for reuse - Google Patents

A kind of system of high-salt wastewater treatment for reuse Download PDF

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CN206437968U
CN206437968U CN201621376890.7U CN201621376890U CN206437968U CN 206437968 U CN206437968 U CN 206437968U CN 201621376890 U CN201621376890 U CN 201621376890U CN 206437968 U CN206437968 U CN 206437968U
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water
reverse osmosis
regulating reservoir
stage reverse
self
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张晗
胡娜
郭海峰
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Qingdao Jinlong Hongye Environmental Protection Co Ltd
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Qingdao Jinlong Hongye Environmental Protection Co Ltd
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Abstract

The utility model discloses a kind of system of high-salt wastewater treatment for reuse, the system includes:Regulating reservoir, for balanced water quality and avoid precipitation;Sedimentation basin, is connected with regulating reservoir, for water of the precipitation process from regulating reservoir;Clear water reserviors, are connected with sedimentation basin, for adjusting the pH from sedimentation basin clear water at the middle and upper levels;Self-cleaning filter, is connected with clear water reserviors, for water of the filtration treatment in clear water reserviors;Ultrafiltration apparatus, is connected with self-cleaning filter, for carrying out ultrafiltration to the production water from self-cleaning filter;First-stage reverse osmosis device, is connected with ultrafiltration apparatus, for the production water from ultrafiltration apparatus to be carried out into first-stage reverse osmosis processing;Second level reverse osmosis apparatus, is connected with first-stage reverse osmosis device, for the production water of first-stage reverse osmosis device to be carried out into two-pass reverse osmosis processing, thus obtains reuse production water.System of the present utility model can effectively reduce carbonate hardness, remove partial organic substances and colloid;Salt rejection rate is high, and the rate of recovery is high.

Description

A kind of system of high-salt wastewater treatment for reuse
Technical field
The utility model is related to wastewater recycling system and method, more particularly to a kind of high-salt wastewater recycles system System, belongs to sewage treatment area.
Background technology
With industrial progress and social development, water pollution is also on the rise.The seriously polluted influence people's lives of water, harm Human health.In order that obtaining the water quality requirement that sewage reaches drainage requirement or reused, the dirty water decontamination handles must be carried out.Separately Outside, the preciousness and shortage of water resource, also make it that reuse also turns into inevitable after sewage disposal, and demand is increasing, particularly The area that those freshwater resources are lacked, such as island, desert.Sewage disposal is widely used in building, agricultural, traffic, energy The every field such as source, petrochemical industry, medical treatment, food and drink.It presently, there are the lower method of a variety of sewage disposals:Sand filtration method contains big to removing Preferably, but pollutant is easily enriched with blocking filtrate to the Effects of Water Quality of grain pollutant, and backwash water return system pollute thing load by Step increase.The method of advanced oxidation processes is a lot, such as:Wet oxidation, strong oxidizer oxidation, ozone oxidation etc., its energy consumption is higher, and The application of different water bodys above has significant limitations.Ion-exchange is built by capacity limit and operating cost is high, and resin regeneration It is cumbersome.The cost of distillation and concentration is also of a relatively high, and economic, high-quality dewatering microporous film not yet researches and develops maturation at present.
Contain higher soluble solid material in high total dissolved solid material (TDS) waste water, be greater than 4000mg/ L, 4500mg/L, 5000mg/L etc..High total dissolved solid material, which typically also reflects, contains higher salinity in the waste water, Therefore also there is document referred to as high-salt wastewater.High-salt wastewater is difficult to handle due to high salt content, particularly to recycling Speech, so the demand to treatment method for high-salinity wastewater increasingly increases.
Utility model content
In view of problem present in background technology, the purpose of this utility model is that providing a kind of high-salt wastewater recycles Method, which solves the low key technical problem of purifying rate in current waste water recycling device.
In order to achieve the above object, the utility model provides a kind of system of high-salt wastewater treatment for reuse, wherein the height The TDS > 4000mg/L of salt waste water, the system includes:Regulating reservoir, for the balanced high-salt wastewater water quality and avoid sinking Form sediment;Sedimentation basin, is connected with regulating reservoir, for water of the precipitation process from the regulating reservoir;Clear water reserviors, are connected with sedimentation basin, use In pH of the adjustment from sedimentation basin clear water at the middle and upper levels;Self-cleaning filter, is connected with clear water reserviors, and clear water is come from for filtration treatment Water in pond;Ultrafiltration apparatus, is connected with self-cleaning filter, for carrying out ultrafiltration to the production water from self-cleaning filter;One Level reverse osmosis unit, is connected with ultrafiltration apparatus, for the production water from ultrafiltration apparatus to be carried out into first-stage reverse osmosis processing;Two grades anti- Permeability apparatus, is connected with first-stage reverse osmosis device, for the production water of first-stage reverse osmosis device to be carried out into two-pass reverse osmosis processing, by This obtains reuse production water.
In the system according to high-salt wastewater treatment for reuse described in the utility model, it is anti-that the system also includes activated carbon Sedimentation basin is answered, activated carbon reaction settling basin is connected with first-stage reverse osmosis device, for the concentrated water produced to first-stage reverse osmosis device Handled.
In the system according to high-salt wastewater treatment for reuse described in the utility model, wherein the self-cleaning filter with Regulating reservoir is connected, for the backwash draining of self-cleaning filter to be introduced into circular treatment in regulating reservoir.
In the system according to high-salt wastewater treatment for reuse described in the utility model, wherein the ultrafiltration apparatus and regulation Pond is connected, for the backwash draining of ultrafiltration apparatus to be introduced into circular treatment in regulating reservoir.
In the system according to high-salt wastewater treatment for reuse described in the utility model, wherein the second level reverse osmosis apparatus It is connected with first-stage reverse osmosis device, the concentrated water for second level reverse osmosis apparatus to be produced introduces first-stage reverse osmosis device and circulated Processing.
The utility model provides a kind of high-salt wastewater treatment for reuse method, and it comprises the following steps:1) precipitate, high salt is given up Water is collected into regulating reservoir, wherein the TDS > 4000mg/L of high-salt wastewater, is introduced into after regulation in sedimentation basin, and successively Lime, coagulant, flocculant is added to be precipitated;2) pH value is adjusted, by step 1) the middle upper strata clear water introducing clear water reserviors generated In, acid adding adjustment pH is 8-9;3) self-cleaning filtering, by step 2) in obtained water be introduced into self-cleaning filter, carried out Filter;4) ultrafiltration, by step 3) in obtained production water introduce ultrafiltration apparatus, obtain ultrafiltration production water;5) first-stage reverse osmosis, by step 4) In obtain ultrafiltration production water introduce first-stage reverse osmosis device, while add reducing agent, antisludging agent;6) two-pass reverse osmosis, step 5) Obtained production water introduces second level reverse osmosis apparatus and handled, and thus obtains recycle-water.
According in high-salt wastewater treatment for reuse method described in the utility model, by step 5) obtained concentrated water introduces and lives In property charcoal reaction settling basin and activated carbon, coagulant, flocculant are sequentially added, the qualified discharge after processing.
According in high-salt wastewater treatment for reuse method described in the utility model, the coagulant is aluminium polychloride PAC or poly-ferric chloride, the flocculant are polyacrylamide PAM.
According in high-salt wastewater treatment for reuse method described in the utility model, by step 6) obtained concentrated water introduces one Level reverse osmosis unit, carries out circular treatment.
According in high-salt wastewater treatment for reuse method described in the utility model, by step 5) obtained part production water with Step 6) production aqueous phase mixing, thus obtain recycle-water.
The beneficial effects of the utility model:
Precipitated, filtered using fairly simple medicament (lime, coagulant and flocculant) in pretreatment system, effectively Reduce carbonate hardness, remove partial organic substances and colloid, mitigate the load of follow-up film processing system, protection film processing system is just Often operation;
Ultrafiltration membrance filter system is using pretreatment of the ultra-filtration filters (UF) as reverse osmosis deaslination (RO) system.Ultra-filtration filters Can be dammed the biomasses such as colloid, larger molecular organicses, bacterial virus and suspended particle, and the turbidity for crossing water after filter is less than 0.2NTU, pollution index SDI are less than 3, the rate of recovery >=90%;
First-stage reverse osmosis system Water Sproading rate is more than salt rejection rate >=98%, 3 year in 70%, 1 year in reverse osmosis desalinization system Interior salt rejection rate >=97%.Two-stage reverse osmosis system Water Sproading rate is more than 80%, and salt rejection rate in salt rejection rate >=97%, 3 year in 1 year >= 96%.90% or so can also be reached to the clearance of dissolubility COD in water;
Pollutant in self-cleaning filter sewer, hyperfiltration reverse-rinsing water is mainly SS, COD, using the place of coagulating sedimentation PROCESS FOR TREATMENT sewage and backwash draining are managed, the discharge standard of waste water is reached.Invest small, operating cost low, can effectively control The water producing cost of recycle-water;
Counter-infiltration (RO) concentrated water uses active carbon absorption technology, and advantage is that technique is simple, operating cost is low, COD after processing, Ammonia nitrogen, total phosphorus etc. can qualified discharges.
Brief description of the drawings
Fig. 1 is the process chart that Sewage treatment of the present utility model is utilized.
Embodiment
For the purpose of this utility model, technical scheme and advantage is more clearly understood, carried out below in conjunction with accompanying drawing Describe in detail.
Regulating reservoir:Regulating reservoir can be sufficiently mixed water quality, balanced water quality and avoid precipitation, be conducive to subsequent handling.
Sedimentation basin:Waste water is not before coagulant and flocculant is added, itself matter of colloid and tiny suspended particulate in water Amount is very light, and random Brownian movement is done by the collision of the molecular thermalmotion of water.Particle all carries same sex electric charge, between them Electrostatic repulsion prevent it is closer to each other and aggregate into larger particle between particulate;And coagulant and flocculant are sequentially added in water Afterwards, charge neutrality occurs for the colloid and discrete particles with suspension, forms wadding grain sedimentation, and they collide with each other in infall process Cohesion, its size and quality constantly become big, and settling velocity is continuously increased.Floccule body has powerful absorption affinity, can not only adsorb suspension, Can also absorbed portion bacterium and dissolved matter.Appropriate coagulant is selected as needed, such as described coagulant can be Aluminum sulfate, aluminium polychloride, poly-ferric chloride, ferrous sulfate, alum (alum), sodium aluminate or ferric sulfate;Flocculant is Polyacrylic acid, Sodium Polyacrylate, calcium polyacrylate (CPA) or polyacrylamide;Preferably, the coagulant be PB1 gene or Poly-ferric chloride, the flocculant is polyacrylamide PAM.Lime can make the calcium and magnesium plasma deposition in water, effectively reduce carbon Hydrochlorate hardness.The concentration of lime is that 150-200mg/L, the concentration of coagulant are that 15-20mg/L, the concentration of flocculant are 0.5- 1mg/L。
Clear water reserviors:For the upper strata clear water generated in settlement on storage pond, and acid adding adjusts pH, and the acid is hydrochloric acid or sulphur Acid.
Self-cleaning filter intercepts solid impurity and particulate matter in water using filter screen, so as to reduce the turbidity of water, improves The filter-specific equipment of water quality.Water is that the filter screen entered by water inlet in filter interior, machine is blocked to the impurity in water Cut;It, which has, is filtered to water and has the automatic function of to filter core clean blowdown.The mistake of the self-cleaning filter It is 80 μm, 100 μm, 120 μm, 150 μm or 200 μm to filter size, can select appropriate filter sizes, such as 150 μm.By certainly Water after cleaning filter filtering enters ultrafiltration apparatus, and the anti-sewage cleaned, which is discharged into regulating reservoir, carries out circular treatment.
Ultrafiltration is using pressure as motive force, for the purpose of macromolecular and separation of small molecuies.In ultra-filtration process, the aqueous solution exists Under pressure is promoted, film surface is flowed through, less than the solvent (water) and small molecule solute water permeable membrane of fenestra, as scavenging solution, compares fenestra Big solute and solute group is trapped, and is discharged with current, as concentrate.Ultra-filtration process is dynamic filtration, and separation is in stream Completed under dynamic state.In the utility model, the ultrafiltration production water produced through ultrafiltration apparatus enters first-stage reverse osmosis device, concentration Liquid is discharged into regulating reservoir for cleaning the backwash liquor of ultrafiltration apparatus and carries out circular treatment.
Counter-infiltration is also known as reverse osmosis, and one kind isolates the UF membrane operation of solvent using pressure differential as motive force from solution. Feed liquid to film side applies pressure, when pressure exceedes its osmotic pressure, and solvent can make reverse against the direction of naturally osmotic Infiltration.So as to the solvent passed through in the low-pressure side of film, i.e. penetrating fluid;The solution that high-pressure side is concentrated, i.e. concentrate.If Reverse-osmosis treated seawater is used, fresh water is obtained in the low-pressure side of film, bittern is obtained in high-pressure side.
First-stage reverse osmosis device:First-stage reverse osmosis device can be for example selected as needed;Such as described device can be with For 5 μm of cartridge filters.Cartridge filter belongs to accurate filter, and its operation principle is carried out using the hole of 5 μm of PP filter cores Mechanical filter.Remaining trace suspension particle, colloid, microorganism etc., are trapped or adsorb in cartridge surface and hole in water. The major advantage of cartridge filter is efficiency high, resistance is small, be conveniently replaceable.Cartridge filter is typically less than 10 μm using aperture, 5 μm are may be designed as according to actual conditions or lower.It is anti-that the concentrated water produced after being filtered through first-stage reverse osmosis device enters activated carbon Answer sedimentation basin.Appropriate reducing agent and antisludging agent is selected as needed, and the reducing agent can be sodium pyrosulfite, bisulfite Sodium, the antisludging agent can be calgon, sodium tripolyphosphate.Need periodically to add sterilization in first-stage reverse osmosis device Agent, is specially weekly, the addition time is 2h or so, and the bactericide can be the bromo- 3- amino propionamides of 2-2- bis- (DBNPA), OIT.The concentration of reducing agent is that 3-5mg/L, the concentration of antisludging agent are that 3-5mg/L, the concentration of bactericide are 80-100mg/L。
Second level reverse osmosis apparatus:To carrying out secondary counter-infiltration by the fresh water of first-stage reverse osmosis device.Through two-pass reverse osmosis The concentrated water obtained after device processing enters first-stage reverse osmosis device and carries out circular treatment.
Activated carbon reaction settling basin:The suction-operated of activated carbon is physical change, can remove chlorine in water, phenol, arsenic, The harmful substances such as lead, cyanide, agricultural chemicals;The adsorption capacity of activated carbon outside boundary's condition, mainly compares surface with activated carbon among other things Product is relevant, and specific surface area is big, and micropore quantity is more, and the adsorbate that can be adsorbed on porous wall is just more.Adsorption rate is mainly and granularity And broad pore distribution is relevant, the activated carbon of water process, it is desirable to transitional pore (radius) more flourishing, be conducive to Adsorbate spreads into micropore.The suction-operated of coagulant and flocculant is chemical change, using ferric ion or aluminium from After son hydrolysis the ferric hydroxide colloid that produces either alumine hydroxide colloid can adsorb the small insoluble particle shape that is suspended in water into The property of precipitation.Concentrated water qualified discharge after the processing of activated carbon reaction settling basin.
Blowoff basin:For receiving the supernatant liquor produced in activated carbon reaction settling basin.
Reuse pool:Sewage is recycled after serial of methods is handled, and is specially partly through first-stage reverse osmosis Production water after processing and the production water after being handled through two-pass reverse osmosis or the production water after all being handled through two-pass reverse osmosis enter reuse Pond.
Embodiment 1
By 1000L raw water collections into regulating reservoir, it is placed in sedimentation basin, is added in every liter of raw water using elevator pump 180mg lime, 18mg aluminium polychlorides, 0.8mg polyacrylamides are precipitated, and 985L upper stratas clear water is stored into clear water reserviors, Afterwards plus hydrochloric acid adjustment pH be 8, the sludge for generation of draining;The water outlet of clear water reserviors is lifted into 150 μm from clearly using intake pump Filter is washed, it is 970L to obtain production water, obtains backwash and is drained into circular treatment in regulating reservoir;
Obtained production water is entered into ultrafiltration apparatus, the ultrafiltration production water for obtaining 873L enters ultrafiltration production pond, obtains backwash row Water enters circular treatment in regulating reservoir;
873L water in ultrafiltration production pond is promoted to first-stage reverse osmosis device by high-pressure pump, while being added in every liter of raw water 4mg sodium pyrosulfites, 4mg antisludging agents, 80mg DBNPA are added in every liter of raw water week about, persistently add 2 hours, obtain 611L produces water and 261L concentrated waters, and wherein concentrated water enters in activated carbon reaction settling basin, and adds activated carbon, aluminium polychloride, gathers Acrylamide, obtains 248L upper liquids and enters in blowoff basin, the sludge for generation of draining;Obtained 611L production water fully enters two grades Reverse osmosis unit, the 501L production water of obtained two-pass reverse osmosis enters reuse pool, and obtained two-pass reverse osmosis concentrated water enters one Level reverse osmosis unit carries out circular treatment.
Embodiment 2
By 1500L raw water collections into regulating reservoir, it is placed in sedimentation basin, is added in every liter of raw water using elevator pump 150mg lime, 15mg aluminium polychlorides, 0.5mg polyacrylamides are precipitated, and 1485L upper stratas clear water is stored into clear water reserviors, Afterwards plus hydrochloric acid adjustment pH be 8.5, the sludge for generation of draining;The water outlet of clear water reserviors is lifted into 150 μm certainly using intake pump Filter is cleaned, it is 1470L to obtain production water, and obtained backwash is drained into circular treatment in regulating reservoir;
Obtained production water is entered into ultrafiltration apparatus, the ultrafiltration production water for obtaining 1337L enters ultrafiltration production pond, obtained backwash It is drained into circular treatment in regulating reservoir;
1337L water in ultrafiltration production pond is promoted to first-stage reverse osmosis device by high-pressure pump, while adding in every liter of raw water Enter 3mg sodium pyrosulfites, 3mg antisludging agents, add 90mg OITs in every liter of raw water week about, persistently add 2 hours, First-stage reverse osmosis device produces 976L production water and 361L concentrated waters, and wherein concentrated water enters in activated carbon reaction settling basin, and adds work Property charcoal, aluminium polychloride, polyacrylamide, obtaining 346L upper liquids enters blowoff basin, the sludge for generation of draining;Wherein 488L is produced Water enters reuse pool, and 488L production water enters second level reverse osmosis apparatus;The 405L production water of obtained two-pass reverse osmosis enters reuse Pond, obtained two-pass reverse osmosis concentrated water enters first-stage reverse osmosis device and carries out circular treatment.
Embodiment 3
By 800L raw water collections into regulating reservoir, it is placed in sedimentation basin, is added in every liter of raw water using elevator pump 200mg lime, 20mg aluminium polychlorides, 1mg polyacrylamides are precipitated, and 789L upper stratas clear water is stored into clear water reserviors, it Afterwards plus hydrochloric acid adjustment pH be 9, the sludge for generation of draining;The water outlet of clear water reserviors is lifted into by 150 μm of self-cleanings using intake pump Filter, it is 785L to obtain production water, and obtained backwash is drained into circular treatment in regulating reservoir;
Obtained production water is entered into ultrafiltration apparatus, the ultrafiltration production water for obtaining 722L enters ultrafiltration production pond, obtained backwash It is drained into circular treatment in regulating reservoir;
722L water in ultrafiltration production pond is promoted to first-stage reverse osmosis device by high-pressure pump, while being added in every liter of raw water 5mg sodium pyrosulfites, 5mg antisludging agents, 100mg OITs are added in every liter of raw water week about, persistently added 2 hours, First-stage reverse osmosis device produces 540L production water and 180L concentrated waters, and wherein concentrated water enters in activated carbon reaction settling basin, and adds work Property charcoal, aluminium polychloride, polyacrylamide, obtaining 175L upper liquids enters blowoff basin, the sludge for generation of draining;Wherein 270L is produced Water enters reuse pool, and 270L production water enters second level reverse osmosis apparatus;The 230L production water of obtained two-pass reverse osmosis enters reuse Pond, obtained two-pass reverse osmosis concentrated water enters first-stage reverse osmosis device and carries out circular treatment.
Table 1 is embodiment 1-3 to the dirty water decontamination handles experimental result.
Table 1 is embodiment 1-3 to the dirty water decontamination handles experimental result (unit mg/L)
Although the embodiment disclosed by the utility model is as above, described content is only to facilitate understand this practicality It is new and use embodiment, be not limited to the utility model.Skill in any the utility model art Art personnel, on the premise of the spirit and scope disclosed by the utility model are not departed from, can implementation formal and details On make any modification and change, but scope of patent protection of the present utility model, must still be defined with appended claims Scope be defined.

Claims (5)

1. a kind of system of high-salt wastewater treatment for reuse, wherein the TDS > 4000mg/L of the high-salt wastewater, the system bag Include:
Regulating reservoir, for the balanced high-salt wastewater water quality and avoid precipitation;
Sedimentation basin, is connected with regulating reservoir, for water of the precipitation process from the regulating reservoir;
Clear water reserviors, are connected with sedimentation basin, for adjusting the pH from sedimentation basin clear water at the middle and upper levels;
Self-cleaning filter, is connected with clear water reserviors, for water of the filtration treatment in clear water reserviors;
Ultrafiltration apparatus, is connected with self-cleaning filter, for carrying out ultrafiltration to the production water from self-cleaning filter;
First-stage reverse osmosis device, is connected with ultrafiltration apparatus, for the production water from ultrafiltration apparatus to be carried out into first-stage reverse osmosis processing;
Second level reverse osmosis apparatus, is connected with first-stage reverse osmosis device, for the production water of first-stage reverse osmosis device to be carried out into two grades instead Infiltration is handled, and thus obtains reuse production water.
2. system according to claim 1, in addition to activated carbon reaction settling basin, activated carbon reaction settling basin and one-level are anti- Permeability apparatus is connected, for handling the concentrated water that first-stage reverse osmosis device is produced.
3. system according to claim 1, wherein the self-cleaning filter is connected with regulating reservoir, for by self-cleaning The backwash draining of filter is introduced into circular treatment in regulating reservoir.
4. system according to claim 1, wherein the ultrafiltration apparatus is connected with regulating reservoir, for by the anti-of ultrafiltration apparatus Wash draining and be introduced into circular treatment in regulating reservoir.
5. system according to claim 1, wherein the second level reverse osmosis apparatus is connected with first-stage reverse osmosis device, is used for The concentrated water that second level reverse osmosis apparatus is produced introduces first-stage reverse osmosis device and carries out circular treatment.
CN201621376890.7U 2016-12-15 2016-12-15 A kind of system of high-salt wastewater treatment for reuse Active CN206437968U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106745981A (en) * 2016-12-15 2017-05-31 青岛锦龙弘业环保有限公司 A kind of system and method for high-salt wastewater treatment for reuse
CN114380444A (en) * 2021-12-29 2022-04-22 江苏方洋水务有限公司 High-salinity wastewater desalination treatment system and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106745981A (en) * 2016-12-15 2017-05-31 青岛锦龙弘业环保有限公司 A kind of system and method for high-salt wastewater treatment for reuse
CN114380444A (en) * 2021-12-29 2022-04-22 江苏方洋水务有限公司 High-salinity wastewater desalination treatment system and method

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