CN104276711A - Reverse osmosis membrane treatment process for recycling industrial sewage and realizing zero release - Google Patents
Reverse osmosis membrane treatment process for recycling industrial sewage and realizing zero release Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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Abstract
The invention relates to a reverse osmosis membrane treatment process for recycling industrial sewage and realizing zero release. The reverse osmosis membrane treatment process is characterized by adopting a lime softening, alkaline-removing and clarifying tank, a filter tank, an ultrafiltration device and a primary reverse osmosis device as a first-stage concentrating and recycling system; adopting a weak acid type cation exchanger, a strong acid type cation exchanger, a carbon remover and a concentrated water reverse osmosis device as a second-stage concentrating and recycling system; adopting a concentrating reverse osmosis device as a third-stage concentrating and recycling system; adopting an evaporation crystallizer as a crystallizing and separating device for inorganic ions of the final concentrated liquid; and connecting the three systems in series to form the treatment process. The reverse osmosis membrane treatment process is especially suitable for reduction of industrial sewage and zero-release treatment projects of enterprises. The outlet water of the process system can be recycled as supplementing water for circulating and cooling water, a water source of boiler supplementing water and other purposes; the evaporation crystal substances can be used for a chemical raw material-brine; and other pollutants such as hard substances and suspended solids (SS) in the sewage are subjected to the solid-waste treatment in the form of dry sludge.
Description
Technical field
The present invention relates to the reverse osmosis membrane treatment process in environment protection sewage process and energy-saving and emission-reduction field, particularly a kind of Waste Water Reuse and zero release.
Background technology
Industrial enterprise needs to use a large amount of water in process of production.Usually with surface water or underground water for water source, by purification and Water Treatment, be met the process water of the different qualities that production equipment needs.In purification and Water Treatment process, also can produce a certain amount of waste water while obtaining purified water, such as filter backwash draining, reverse osmosis concentrated water, ion-exchanger regenerative wastewater etc.In process of production, part industrial equipments or processing medium need cooling, this just needs recirculated cooling water, recirculated cooling water in working cycle due to evaporation or by pipeline and equipment contaminate in flow process, salt and pollutent in recirculated water is caused to concentrate, at this moment just needing supplementary clean water for maintaining the various ionic equilibrium of recirculated water, emitting component loops water.In addition, industrial equipments some processes discharge water also needs discharge after biochemical treatment is up to standard.The sewage of these several respects account for most of ratio of industrial sewage.The feature of these sewage is that saliferous is high, organism is also higher with other Pollutant levels, if these sewage are directly discharged, not only waste valuable water resources, and bring larger harm can to very fragile physical environment, do not meet the Development patterns of the recycling economy required by country simultaneously yet.For this reason, local governments at all levels just require the inaccurate outer row's (zero release) of the sewage of enterprise when approving and initiate a project.
Meanwhile, China's water resources is also more and more nervous.All parts of the country all control very tight to enterprise water use amount.Ensure the normal production of enterprise, the necessary water consumption of device needs well to be ensured.Seek sources of water from the sewage of discharge, so both reach reduction of discharging object, the demand to natural water source can be reduced again, accomplish the object of " increasing income and decreasing expenditure ".
Summary of the invention
The object of the present invention is to provide the reverse osmosis membrane treatment process of a kind of Waste Water Reuse and zero release, for the requirement to the zero release of sewage and high reclamation rate of the environmental requirement of current country and enterprise, the rate of recovery that mainly under solution regular situation, reverse osmosis membrane occurs when processing industrial sewage is low, concentration rate can not be too high, causes evaporation unit below invest excessive and run bad problem.In the hardness material fouling simultaneously occurred in concentration process for sewage, water, the process of the suspended substance (SS) of enrichment have found technical solution scheme.It is specially adapted to the industrial sewage minimizing of various enterprises and zero discharge treatment engineering.The water outlet of this process system reuse can make recirculated cooling water make up water, the water source of boiler replenishing water and other purposes.Evaporative crystallization thing can as industrial chemicals--and bittern water uses.Other pollutents such as the hardness material in sewage, suspended substance (SS) carry out fixed-end forces with the form of dewatered sludge.
For achieving the above object, the present invention realizes like this.
A reverse osmosis membrane treatment process for Waste Water Reuse and zero release, is characterized in that: it adopts and forms Waste Water Reuse and technique of zero discharge based on the concentrated of three grades of reverse osmosis membrane water technologies and reclaiming system; Wherein: adopt lime soften for sewage to remove alkali settling pond, filter tank, ultra-filtration equipment and first-stage reverse osmosis device and concentrate and reclaiming system as the first step; Weak-type cation exchanger, strong-acid type cation interchanger, carbon dioxide cleaner and dense water reverse osmosis unit is adopted to concentrate and reclaiming system as the second stage; Concentrate reverse osmosis unit is adopted to concentrate and reclaiming system as the third stage; Evaporative crystallizer is as the Crystallization Separation device to last concentrated solution mineral ion; First three section of system is concatenated composition treatment process.
The reverse osmosis membrane treatment process of described Waste Water Reuse and zero release, is characterized in that: this treatment process processes in the system be made up of except alkali settling pond, filter tank, ultra-filtration equipment, first-stage reverse osmosis device, weak-type cation exchanger, strong-acid type cation interchanger, carbon dioxide cleaner, dense water reverse osmosis unit, concentrate reverse osmosis unit, evaporative crystallizer, mud collection device and sludge dehydration device lime soften for sewage, sewage is introduced into lime soften for sewage except alkali settling pond, the water outlet that lime soften for sewage removes alkali settling pond enters filter tank, unnecessary mud enters mud collection device, filter tank water outlet enters ultra-filtration equipment, the waste water of the regular backwash in filter tank enters the water inlet of lime soften for sewage except alkali settling pond, the water outlet of ultra-filtration equipment enters first-stage reverse osmosis device, the waste water of the regular backwash of ultra-filtration equipment enters the water inlet of lime soften for sewage except alkali settling pond, the going out Water Sproading and can directly utilize of first-stage reverse osmosis device, the dense water of first-stage reverse osmosis device enters weak-type cation exchanger, the water outlet of weak-type cation exchanger enters strong-acid type cation interchanger, weak-type regenerating cation exchanger waste water enters the water inlet of lime soften for sewage except alkali settling pond, the water outlet of strong-acid type cation interchanger enters carbon dioxide cleaner, strong-acid type cation interchanger regenerative wastewater enters the water inlet of lime soften for sewage except alkali settling pond, the water outlet of carbon dioxide cleaner enters dense water reverse osmosis unit, the dense water of dense water reverse osmosis unit enters concentrate reverse osmosis unit, dense water reverse osmosis unit goes out Water Sproading and can directly utilize, the dense water of concentrate reverse osmosis unit enters evaporative crystallizer, recycle after the water outlet of concentrate reverse osmosis unit can mix with the former water of industry, evaporative crystallizer xln can carry out solid waste recycling, the water outlet of mud collection device enters sludge dehydration device, dry mud after sludge dehydration device dehydration can be transported outward and carry out fixed-end forces, sludge dehydration device effluent recycling removes the water inlet of alkali settling pond to lime soften for sewage, lime soften for sewage is entered except alkali settling pond together with sewage.
The reverse osmosis membrane treatment process of described Waste Water Reuse and zero release, is characterized in that: the content of the inorganic mineral of the product water of this first-stage reverse osmosis device is less than common tap water, can be used for boiler feedwater or other process water.
The reverse osmosis membrane treatment process of described Waste Water Reuse and zero release, it is characterized in that: the dense water of the first-stage reverse osmosis after being softened by two-stage can add alkaline matter before entering dense water reverse osmosis unit, control its pH value between 8.5 ~ 12, ensure that dense water reverse osmosis unit runs under alkaline water condition, can effectively prevent reverse osmosis membrane to be subject to the pollution of organic contamination and silicon like this under the normal rate of recovery.
The reverse osmosis membrane treatment process of described Waste Water Reuse and zero release, is characterized in that: this alkaline matter is NaOH.
The reverse osmosis membrane treatment process of described Waste Water Reuse and zero release, is characterized in that: the content of the inorganic mineral of the product water of this dense water reverse osmosis unit is suitable with common tap water, can be used for boiler feedwater or other process water.
The reverse osmosis membrane treatment process of described Waste Water Reuse and zero release, it is characterized in that: the dense water that this dense water reverse osmosis unit discharges adds Scale inhibitors before entering concentrate reverse osmosis unit, by concentrate reverse osmosis unit again by concentrated 3 ~ 5 times of the dense water of dense water reverse osmosis unit, the TDS of the dense water of concentrate reverse osmosis unit discharge can reach 80000 ~ 150000mg/l.
The reverse osmosis membrane treatment process of described Waste Water Reuse and zero release, is characterized in that: according to the situation of TDS content in raw waste water, and concentrate reverse osmosis unit can adopt one-level concentrate reverse osmosis process, also can adopt secondary concentrate reverse osmosis process.
The reverse osmosis membrane treatment process of described Waste Water Reuse and zero release, is characterized in that: the reverse osmosis of this concentrate reverse osmosis unit will adopt low area, wide runner, short route, membrane module that contamination resistance is strong.
The reverse osmosis membrane treatment process of described Waste Water Reuse and zero release, it is characterized in that: the content of the inorganic mineral of the product water of this concentrate reverse osmosis unit and common tap water quite or slightly high, can be used as circulating water system or other process water uses.
The advantage of the inventive method is as follows:
1, in the inventive method, sewage first enter lime soften for sewage except alkali settling pond, filter tank, ultra-filtration equipment and first-stage reverse osmosis device composition primary concentration and reclaiming system.Industrial sewage is by after lime soften for sewage settling pond, filter tank, ultra-filtration equipment, and residual hardness is generally 0.8 ~ 1.2mmol/L, and residual basicity is that 0.8mmol/L, SDI are less than 3.Can reach 60 ~ 75% in such flow condition next stage reverse osmosis rate of recovery, ratio of desalinization can reach 95% more than (considering by poor situation after 3 years).Primary concentration and reuse technology produce the inorganic content of water generally lower than tap water, can use as boiler feedwater or industrial former water completely.The dense water that primary concentration and reclaiming system obtain enters secondary concentration and reclaiming system.
2, in the inventive method the dense water (specific conductivity is generally 10000 μ about S/cm) of primary concentration and reuse technology enter weak type cation exchanger, strong type cation exchanger, carbon dioxide cleaner, dense water reverse osmosis unit composition secondary concentration and reclaiming system.More thoroughly remove remaining hardness and basicity in water by weak type cation exchanger, strong type cation exchanger, ensure out that the water hardness is 1.5mg/L, CO in water after carbon dioxide cleaner
2content is less than 5mg/l, then pH regulator is passed through, dense water reverse osmosis is run in the basic conditions, for influent quality, dense water reverse osmosis can not add Scale inhibitors, the dense water reverse osmosis unit rate of recovery can reach 60 ~ 70%, and ratio of desalinization can reach 95% more than (considering by poor situation after 3 years).Secondary concentration and reuse technology produce mineral substances of water and tap water is suitable, also can use as boiler feedwater or industrial former water completely.The dense water that secondary concentration and reclaiming system obtain enters three grades of concentrated and reclaiming systems.
3, in the inventive method, after secondary concentration and reclaiming system, the dense water water quality obtained is quite severe, and saltiness is generally about 20000 ~ 40000mg/L, and organic content can reach 400mg/L.Due to the impact of ordinary RO membrane structure, adopt conventional reverse osmosis membrane processing technique substantially can not realize water concentrated and reuse further.But in order to improve the dense water multiplying power of system, this patent adds three grades of concentrate reverse osmosis concentration and reclaiming system, and reverse osmosis membrane adopts special reverse-osmosis membrane element.This reverse osmosis module as revolutionary reverse osmosis membrane product, be specially adapted to high density, high salinity waste water concentrated, reclaim and qualified discharge.It is extremely wide to the subject range at water inlet water source, and antifouling property has incomparable advantage.The tolerance high to influent quality, as shown in the table:
| Sequence number | Water quality project | Unit | Numerical value | Remarks |
| 1 | COD | mg/l | 60000 | During the rate of recovery 50% |
| 2 | Ammonia nitrogen | mg/l | 4000 | ? |
| 3 | Specific conductivity | μS/cm | 30000 | During the rate of recovery 75% |
Three grades of concentrated and reclaiming systems are by one-level or the special reverse osmosis unit of two-stage, and its Water Sproading rate can reach more than 75%, and ratio of desalinization can reach 95% more than (considering by poor situation after 3 years).Three grades of concentrated and reclaiming systems produce water mineral and tap water quite or slightly high, also can use together with after the former water of industry mixes completely.
After concentrated by three grades, final concentrated solution of discharging only has 20 ~ a thirtieth of raw waste water amount.
4, in the inventive method, concentrated solution is carried out evaporative crystallization by the final means of zero release exactly.Evaporative crystallizer is major equipment, main employing falling-film crystallizer and Multi-effect evaporation crystallizer.Phlegma mineral substance after evaporative crystallization is better than tap water, can recycle completely.Evaporative crystallization thing can as industrial chemicals--and bittern water uses or landfill disposal.
5, in the inventive method, the waste water mainly lime soften for sewage produced in whole Waste Water Reuse and zero release reverse osmosis membrane treatment process-except the water-containing sludge of alkali settling pond periodic exhaustion, filter tank backwash discharge water, hyperfiltration reverse-rinsing discharge water, weak-type cation exchanger and strong-acid type cation interchanger regenerative wastewater and equipment washing waste water.Deliver to lime soften for sewage-except the regulating tank (pond) before alkali settling pond after filter tank backwash discharge water, hyperfiltration reverse-rinsing discharge water, weak-type cation exchanger and strong-acid type cation interchanger regenerative wastewater and equipment washing waste water reclamation, after mixing with industrial sewage, enter lime soften for sewage-process except alkali settling pond; Lime soften for sewage-be collected in mud collection device except the water-containing sludge of alkali settling pond periodic exhaustion, then sludge dehydration device is entered, dry mud after sludge dehydration device dehydration can be transported outward and carry out fixed-end forces, the medicament added in hardness material in the water inlet of i.e. system and most of SS and system treatment process carries out being isolated process with water all in form of a sludge, and the water taken off also delivers to this reusing sewage and zero release---and the entrance of reverse osmosis membrane treatment process re-starts process.
6, the present invention adopts embrane method (ultrafiltration and reverse osmosis) to carry out the concentrated of industrial sewage and reuse.Be made up of three grades of reverse osmosis concentrated waters and reclamation set, evaporative crystallizer.Whole Waste Water Reuse and zero release---the reverse osmosis membrane treatment process rate of recovery can reach more than 95%.The saltiness finally entering the water of vaporizer can reach 150000mg/L, and hardness is less than 20mg/l.Effectively can save vaporizer investment and working cost like this.
The medicament added in hardness material in the water inlet of 7, the system of the inventive method and most of SS and system treatment process is by backflow and lime soften for sewage--except the form of alkali and sludge dewatering and water carry out being isolated process.The sewage discharge problem produced in thorough solution present invention process, realizes real zero release.
8, the inventive method concentrates and adopts in reclamation set at two-pass reverse osmosis the method that weak-type cation exchanger, strong-acid type cation and carbon dioxide cleaner combine, and ensures that dense water feed water by reverse osmosis hardness is less than 1.5mg/L, CO
2content is less than 5mg/L.By adding alkali, dense water reverse osmosis being run in the basic conditions, preventing organic contamination.These measures are that dense water reverse osmosis adopts conventional roll film to create condition, reduce investment and the working cost of secondary concentration and reclaiming system.
9, the inventive method adopts lime soften for sewage at first-stage reverse osmosis in concentrated and reclaiming system--except the water inlet pre-processing device of alkali settling pond, filter tank and ultrafiltration first-stage reverse osmosis device, ensure reverse osmosis unit water inlet SDI value (being generally less than 3), while reduction first-stage reverse osmosis device water inlet hardness, basicity, also reduce the saltiness of water.So both ensure to reduce osmotic pressure while first-stage reverse osmosis normally runs thus effectively reduce first-stage reverse osmosis plant running energy consumption and cost of investment.
10, the inventive method adopts the reverse osmosis of special structure form to be used for three grades of concentration, reduces the final treatment capacity of sewage as far as possible, reduces investment and the working cost of zero release evaporation crystallization equipment.
Accompanying drawing explanation
Fig. 1 is structure and the treatment scheme schematic diagram of present system.
Embodiment
Refer to Fig. 1, the invention discloses the reverse osmosis membrane treatment process of Waste Water Reuse and zero release.As shown in the figure: it processes in the system be made up of except alkali settling pond 1, filter tank 2, ultra-filtration equipment 3, first-stage reverse osmosis device 4, weak-type cation exchanger 5, strong-acid type cation interchanger 6, carbon dioxide cleaner 7, dense water reverse osmosis unit 8, concentrate reverse osmosis unit 9, evaporative crystallizer 10, mud collection device 11 and sludge dehydration device 12 lime soften for sewage.Idiographic flow is: sewage is introduced into lime soften for sewage except alkali settling pond 1, and the water outlet that lime soften for sewage removes alkali settling pond 1 enters filter tank 2, and unnecessary mud enters mud collection device 10.Filter tank 2 water outlet enters ultra-filtration equipment 3, and the waste water of filter tank 2 regularly backwash enters the water inlet of lime soften for sewage except alkali settling pond 1.The water outlet of ultra-filtration equipment 3 enters first-stage reverse osmosis device 4, and the waste water of ultra-filtration equipment 3 regularly backwash enters the water inlet of lime soften for sewage except alkali settling pond 1.The going out Water Sproading and can directly utilize of first-stage reverse osmosis device 4, the dense water of first-stage reverse osmosis device 4 enters weak-type cation exchanger 5.The water outlet of weak-type cation exchanger 5 enters strong-acid type cation interchanger 6, and weak-type cation exchanger 5 regenerative wastewater enters lime soften for sewage-except the water inlet of alkali settling pond 1.The water outlet of strong-acid type cation interchanger 6 enters carbon dioxide cleaner 7, and strong-acid type cation interchanger 6 regenerative wastewater enters the water inlet of lime soften for sewage except alkali settling pond 1.The water outlet of carbon dioxide cleaner 7 enters dense water reverse osmosis unit 8, and the dense water of dense water reverse osmosis unit 8 enters concentrate reverse osmosis unit 9, and dense water reverse osmosis unit 8 goes out Water Sproading and can directly utilize.The dense water of concentrate reverse osmosis unit 9 enters evaporative crystallizer 10, recycles after concentrate reverse osmosis unit 9 water outlet can mix with the former water of industry.Evaporative crystallizer 10 xln can carry out solid waste recycling.The water outlet of mud collection device 11 enters sludge dehydration device 12.Dry mud after sludge dehydration device 12 dewaters can be transported outward and carry out fixed-end forces, and sludge dehydration device 12 effluent recycling is to lime soften for sewage---except the water inlet of alkali settling pond 1, entering lime soften for sewage together with sewage---except alkali settling pond 1.
Alternatively, when saltiness of intaking is higher, the second stage is concentrated can adopt seawater reverse osmosis membrane with membrane element in reclaiming system.
Alternatively, in conjunction with the demand of user, the third stage is concentrated can be made up of the reverse osmosis of one-level concentrate with reclaiming system, and at this moment in water, salt can be concentrated to 80000mg/l.
Embodiment, its treatment scheme as shown in Figure 1:
Here is the sewage quality situation of certain coal chemical industry enterprises relatively more typical.Specific conductivity is generally 4000 μ S/cm, and turbidity is 20NTU, total suspended solid (TSS) for 60mg/l, CODcr be about 60mg/l, silicon (in SiO2) is about 30mg/l, and oil-contg is 3mg/l.
Quantity of wastewater effluent is 1200m3/h.
Adopt Waste Water Reuse and zero release---reverse osmosis membrane treatment process processes.Firsts and seconds concentrate with reclaiming system in adopt conventional brackish water reverse osmosis membrane.Three grades concentrate and adopt DTRO reverse osmosis membrane in reclaiming system.Primary concentration and the reclaiming system rate of recovery are 70%, and primary concentration and the reclaiming system rate of recovery are 65%, three grades of concentrated and reclaiming system rate of recovery is 75%.Total yield is 97.4%.Namely flooding velocity is 1200m
3/ h, recycling part is 1169m
3/ h, the strong brine amount that remaining need enter vaporizer crystallization treatment is 31m
3/ h, in water, saltiness is about 150000mg/l.Can also be recycled by the phlegma after evaporative crystallization, finally almost can reclaim water in sewage.Recycle-water water quality is roughly: specific conductivity is less than 200 μ S/cm, and turbidity is 0.3NTU, total suspended solid (TSS) for 0.1mg/l, CODmn be about 1.5mg/l, silicon (in SiO2) is less than 0.2mg/l.
In sum, be only preferred embodiment of the present invention, be not used for limiting practical range of the present invention, namely all equivalences done according to the content of the present patent application the scope of the claims change and modify, and all should be technology category of the present invention.
Claims (10)
1. a reverse osmosis membrane treatment process for Waste Water Reuse and zero release, is characterized in that: it adopts and forms Waste Water Reuse and technique of zero discharge based on the concentrated of three grades of reverse osmosis membrane water technologies and reclaiming system; Wherein: adopt lime soften for sewage to remove alkali settling pond (1), filter tank (2), ultra-filtration equipment (3) and first-stage reverse osmosis device (4) and concentrate and reclaiming system as the first step; Weak-type cation exchanger (5), strong-acid type cation interchanger (6), carbon dioxide cleaner (7) and dense water reverse osmosis unit (8) is adopted to concentrate and reclaiming system as the second stage; Concentrate reverse osmosis unit (9) is adopted to concentrate and reclaiming system as the third stage; Evaporative crystallizer (10) is as the Crystallization Separation device to last concentrated solution mineral ion; First three section of system is concatenated composition treatment process.
2. the reverse osmosis membrane treatment process of Waste Water Reuse according to claim 1 and zero release, it is characterized in that: this treatment process is removing alkali settling pond (1) by lime soften for sewage, filter tank (2), ultra-filtration equipment (3), first-stage reverse osmosis device (4), weak-type cation exchanger (5), strong-acid type cation interchanger (6), carbon dioxide cleaner (7), dense water reverse osmosis unit (8), concentrate reverse osmosis unit (9), evaporative crystallizer (10), process in the system that mud collection device (11) and sludge dehydration device (12) form, sewage is introduced into lime soften for sewage except alkali settling pond (1), the water outlet that lime soften for sewage removes alkali settling pond (1) enters filter tank (2), unnecessary mud enters mud collection device (10), filter tank (2) water outlet enters ultra-filtration equipment (3), the waste water of filter tank (2) regularly backwash enters the water inlet of lime soften for sewage except alkali settling pond (1), the water outlet of ultra-filtration equipment (3) enters first-stage reverse osmosis device (4), the waste water of ultra-filtration equipment (3) regularly backwash enters the water inlet of lime soften for sewage except alkali settling pond (1), the going out Water Sproading and can directly utilize of first-stage reverse osmosis device (4), the dense water of first-stage reverse osmosis device (4) enters weak-type cation exchanger (5), the water outlet of weak-type cation exchanger (5) enters strong-acid type cation interchanger (6), weak-type cation exchanger (5) regenerative wastewater enters the water inlet of lime soften for sewage except alkali settling pond (1), the water outlet of strong-acid type cation interchanger (6) enters carbon dioxide cleaner (7), strong-acid type cation interchanger (6) regenerative wastewater enters the water inlet of lime soften for sewage except alkali settling pond (1), the water outlet of carbon dioxide cleaner (7) enters dense water reverse osmosis unit (8), the dense water of dense water reverse osmosis unit (8) enters concentrate reverse osmosis unit (9), dense water reverse osmosis unit (8) goes out Water Sproading and can directly utilize, concentrate reverse osmosis unit (9) dense water enters evaporative crystallizer (10), recycle after concentrate reverse osmosis unit (9) water outlet can mix with the former water of industry, evaporative crystallizer (10) xln can carry out solid waste recycling, the water outlet of mud collection device (11) enters sludge dehydration device (12), dry mud after sludge dehydration device (12) dehydration can be transported outward and carry out fixed-end forces, sludge dehydration device (12) effluent recycling removes the water inlet of alkali settling pond (1) to lime soften for sewage, lime soften for sewage is entered except alkali settling pond (1) together with sewage.
3. the reverse osmosis membrane treatment process of Waste Water Reuse according to claim 2 and zero release, it is characterized in that: the content of the inorganic mineral of the product water of this first-stage reverse osmosis device (4) is less than common tap water, can be used for boiler feedwater or other process water.
4. the reverse osmosis membrane treatment process of the Waste Water Reuse according to Claims 2 or 3 and zero release, it is characterized in that: the dense water of the first-stage reverse osmosis after being softened by two-stage enters that dense water reverse osmosis unit (8) is front can add alkaline matter, controls its pH value between 8.5 ~ 12.
5. the reverse osmosis membrane treatment process of Waste Water Reuse according to claim 4 and zero release, is characterized in that: this alkaline matter is NaOH.
6. the reverse osmosis membrane treatment process of the Waste Water Reuse according to Claims 2 or 3 and zero release, it is characterized in that: the content of the inorganic mineral of the product water of this dense water reverse osmosis unit (8) is suitable with common tap water, can be used for boiler feedwater or other process water.
7. the reverse osmosis membrane treatment process of the Waste Water Reuse according to Claims 2 or 3 and zero release, it is characterized in that: the dense water that this dense water reverse osmosis unit (8) is discharged adds Scale inhibitors before entering concentrate reverse osmosis unit (9), by concentrate reverse osmosis unit (9) again by concentrated 3 ~ 5 times of the dense water of dense water reverse osmosis unit (8), the TDS of the dense water that concentrate reverse osmosis unit (9) discharges can reach 80000 ~ 150000mg/l.
8. the reverse osmosis membrane treatment process of the Waste Water Reuse according to Claims 2 or 3 and zero release, it is characterized in that: according to the situation of TDS content in raw waste water, concentrate reverse osmosis unit (9) can adopt one-level concentrate reverse osmosis process, also can adopt secondary concentrate reverse osmosis process.
9. the reverse osmosis membrane treatment process of the Waste Water Reuse according to Claims 2 or 3 and zero release, is characterized in that: the reverse osmosis of this concentrate reverse osmosis unit (9) will adopt low area, wide runner, short route, membrane module that contamination resistance is strong.
10. the reverse osmosis membrane treatment process of the Waste Water Reuse according to Claims 2 or 3 and zero release, it is characterized in that: the content of the inorganic mineral of the product water of this concentrate reverse osmosis unit (9) and common tap water quite or slightly high, can be used as circulating water system or other process water uses.
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| CN104591444A (en) * | 2015-02-10 | 2015-05-06 | 淄博绿洲环境工程有限公司 | Reverse osmosis concentrated water treatment technique |
| CN105000741A (en) * | 2015-07-21 | 2015-10-28 | 神华集团有限责任公司 | Treatment system of reverse osmosis concentrated liquid |
| CN106167342A (en) * | 2016-09-29 | 2016-11-30 | 环境保护部南京环境科学研究所 | A kind of biological medicine waste water nitrogen phosphorus processing means and processing method thereof |
| CN106746116A (en) * | 2016-12-22 | 2017-05-31 | 高频美特利环境科技（北京）有限公司 | A kind of zero-discharge treatment process for industrial wastewater and processing system |
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| CN106746116A (en) * | 2016-12-22 | 2017-05-31 | 高频美特利环境科技（北京）有限公司 | A kind of zero-discharge treatment process for industrial wastewater and processing system |
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| CN109336323A (en) * | 2018-11-20 | 2019-02-15 | 内蒙古伊泰广联煤化有限责任公司 | Highly mineralized mine water processing method and system |
| WO2020125096A1 (en) * | 2018-12-16 | 2020-06-25 | 金科环境股份有限公司 | Treatment system for reverse osmosis concentrated water having high permanent hardness |
| US11046593B2 (en) | 2018-12-16 | 2021-06-29 | Greentech Environment Co., Ltd. | System for treating reverse-osmosis concentrated water with permanent hardness |
| CN111018247A (en) * | 2019-12-20 | 2020-04-17 | 上海巴安水务股份有限公司 | Zero release processing system of chemical industry waste water |
| CN110937657A (en) * | 2019-12-24 | 2020-03-31 | 北京工业大学 | Concentrated water recycling system for dual water supply of public building and zero-emission fine regulation and control method |
| CN110937657B (en) * | 2019-12-24 | 2022-02-15 | 北京工业大学 | Concentrated water recycling system for dual water supply of public building and zero-emission fine regulation and control method |
| CN111732228A (en) * | 2020-07-07 | 2020-10-02 | 江苏源邦环境科技有限公司 | Recovered water treatment system and process in electronic industry |
| CN112093965A (en) * | 2020-09-24 | 2020-12-18 | 煤科集团杭州环保研究院有限公司 | Moderate stepwise cooperative pretreatment process for mine water treatment |
| CN114163020A (en) * | 2021-12-02 | 2022-03-11 | 西安合瑞环境工程有限公司 | Short-process wastewater zero-discharge treatment process |
| CN114604939A (en) * | 2022-04-11 | 2022-06-10 | 倍杰特集团股份有限公司 | Water treatment system and method based on high-strength immersed membrane |
| CN116444106A (en) * | 2023-06-14 | 2023-07-18 | 华电电力科学研究院有限公司 | High-hardness high-sulfate type coal mine water treatment method and device |
| CN116444106B (en) * | 2023-06-14 | 2023-09-12 | 华电电力科学研究院有限公司 | High-hardness high-sulfate type coal mine water treatment method and device |
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