CN114956416A - Treatment method and system for bromine-containing salt wastewater of brominated butyl rubber and application thereof - Google Patents

Treatment method and system for bromine-containing salt wastewater of brominated butyl rubber and application thereof Download PDF

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CN114956416A
CN114956416A CN202110219935.9A CN202110219935A CN114956416A CN 114956416 A CN114956416 A CN 114956416A CN 202110219935 A CN202110219935 A CN 202110219935A CN 114956416 A CN114956416 A CN 114956416A
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treatment
water
effluent
reverse osmosis
nanofiltration
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宋小飞
王镭
安婷婷
钟林
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Sinopec Beijing Research Institute of Chemical Industry
China Petroleum and Chemical Corp
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Sinopec Beijing Research Institute of Chemical Industry
China Petroleum and Chemical Corp
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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
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B7/00—Halogens; Halogen acids
    • C01B7/09—Bromine; Hydrogen bromide
    • 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
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • 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
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • 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
    • C02F1/24—Treatment of water, waste water, or sewage by flotation
    • 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
    • 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
    • C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
    • 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
    • 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
    • C02F1/447—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by membrane distillation
    • 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
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/30—Wastewater or sewage treatment systems using renewable energies
    • Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy

Abstract

The invention relates to the field of industrial wastewater treatment, and discloses a treatment method and a treatment system for brominated butyl rubber bromine-containing wastewater and application thereof, wherein the method comprises the following steps: (1) homogenizing the wastewater, and sequentially performing flocculation precipitation, dissolved air floatation treatment, multi-medium filtration, ultrafiltration and nanofiltration treatment to obtain nanofiltration effluent and nanofiltration concentrated water; (2) carrying out reverse osmosis treatment on the nanofiltration effluent to obtain reverse osmosis effluent and reverse osmosis concentrated water; (3) carrying out membrane distillation treatment on the reverse osmosis concentrated water to obtain membrane distilled water and high-concentration brine; (4) evaporating and crystallizing the high-concentration brine to obtain solid salt and steam condensate. The method combines pretreatment, reverse osmosis, membrane distillation and evaporation crystallization phases, fully utilizes the initial heat of the waste water, has low energy consumption, no pollution and easy industrialization, and realizes zero emission of the waste water produced in the production of the brominated butyl rubber.

Description

Treatment method and system for bromine-containing salt wastewater of brominated butyl rubber and application thereof
Technical Field
The invention relates to the field of industrial wastewater treatment, in particular to a method and a system for treating bromine-containing wastewater of brominated butyl rubber and application thereof.
Background
Brominated butyl rubber is widely used due to its excellent properties of heat resistance, ozone resistance, corrosion resistance, flex resistance, low air permeability and easy crosslinking of other rubbers, and is an essential rubber raw material for manufacturing tubeless tires and medical products. With the development of the automobile industry, the demand of brominated butyl rubber is increasing. The brominated butyl rubber is usually prepared by reacting bromine with hexane solution of butyl rubber, hydrogen bromide is generated in the reaction process, the prepared brominated butyl rubber glue solution contains sodium bromide after being neutralized by sodium hydroxide solution, and the sodium bromide enters a water phase after the glue solution is stripped, so that a large amount of industrial wastewater containing bromine salt is generated. The industrial wastewater not only has the characteristics of high temperature (70-90 ℃), suspended matters such as rubber particles, stearate and the like, organic matters such as epoxidized soybean oil, alcohol compounds and the like, but also contains high-concentration (1.5-6g/L) bromide ions.
In the prior art, bromide ions of bromide-containing waste water generated in the preparation of brominated butyl rubber are usually oxidized into bromine by using strong oxidizing substances such as chlorine, hydrogen peroxide and the like, and then the bromine is separated from the waste water; or the wastewater is directly mixed with chlorine-containing bactericide after being concentrated and then returned to the industrial circulating water for sterilization treatment; or the technologies of reverse osmosis, reverse electrodialysis, crystallization evaporation and the like are coupled to treat the wastewater.
However, the above method for treating wastewater containing bromine salts has high requirements for treatment equipment, and has low initial heat utilization rate for wastewater, resulting in high energy consumption. In addition, the method has low concentration degree on the waste water, so that the recovery and recycling rate of the bromine salt is low.
Disclosure of Invention
The invention aims to solve the problems of high energy consumption, incapability of recycling initial heat of wastewater, high requirement on equipment, low bromine salt recovery rate and the like of a brominated butyl rubber bromine salt-containing wastewater treatment method in the prior art, and provides a brominated butyl rubber bromine salt-containing wastewater treatment method. The method fully utilizes the initial heat of the wastewater, has low energy consumption and no pollution, and is easy for industrialization.
In order to achieve the above object, one aspect of the present invention provides a method for treating brominated butyl rubber waste water containing bromine salts, which is characterized in that the method comprises the following steps:
(1) homogenizing brominated butyl rubber bromide salt-containing wastewater, and sequentially performing flocculation precipitation, dissolved air floatation treatment, multi-medium filtration, ultrafiltration and nanofiltration treatment to obtain nanofiltration effluent and nanofiltration concentrated water;
(2) performing reverse osmosis treatment on the nanofiltration effluent obtained in the step (1) to obtain reverse osmosis effluent and reverse osmosis concentrated water;
(3) carrying out membrane distillation treatment on the reverse osmosis concentrated water obtained in the step (2) to obtain membrane distilled water and high-concentration brine;
(4) and (4) evaporating and crystallizing the high-concentration brine obtained in the step (3) to obtain solid salt and steam condensate.
The invention provides a brominated butyl rubber bromide salt-containing wastewater treatment system, which is characterized by comprising a pretreatment unit, a reverse osmosis unit, a membrane distillation unit and an evaporative crystallization unit;
the pretreatment unit comprises an adjusting water tank, a flocculation sedimentation tank, a dissolved air flotation device, a multi-medium filter, an ultrafiltration device and a nanofiltration device;
the regulating water tank is used for homogenizing the brominated butyl rubber bromine-salt-containing wastewater to obtain outlet water of the regulating water tank;
the flocculation sedimentation tank is used for performing flocculation sedimentation on the effluent from the regulating water tank to obtain the effluent of the flocculation sedimentation tank and sludge of the flocculation sedimentation tank;
the dissolved air floatation device is used for carrying out dissolved air floatation treatment on the effluent of the flocculation sedimentation tank from the flocculation sedimentation tank to obtain dissolved air floatation effluent and dissolved air floatation sludge;
the multi-media filter is used for filtering the dissolved air floatation water from the dissolved air floatation device to obtain multi-media filtered water;
the ultrafiltration device is used for carrying out ultrafiltration treatment on the multi-medium filtered water from the multi-medium filter to obtain ultrafiltration outlet water;
the nanofiltration device is used for carrying out nanofiltration treatment on the ultrafiltration effluent from the ultrafiltration device to obtain nanofiltration effluent and nanofiltration concentrated water;
the reverse osmosis unit is used for performing reverse osmosis treatment on nanofiltration effluent from the nanofiltration device to obtain reverse osmosis effluent and reverse osmosis concentrated water;
the membrane distillation unit is used for carrying out membrane distillation treatment on reverse osmosis concentrated water from the reverse osmosis unit to obtain membrane distilled water and high-concentration brine;
the evaporative crystallization unit is used for carrying out evaporative crystallization treatment on the high-concentration brine from the membrane distillation unit to obtain solid salt and steam condensate.
The third aspect of the invention provides the treatment method of the brominated butyl rubber bromine-containing wastewater and the application of the brominated butyl rubber bromine-containing wastewater treatment system in the treatment of the brominated butyl rubber bromine-containing wastewater.
Through the technical scheme, the method and the system for treating the brominated butyl rubber bromine-containing salt wastewater have the following beneficial effects:
(1) according to the invention, the zero emission of wastewater is achieved by coupling pretreatment, reverse osmosis, membrane distillation and evaporative crystallization technologies, the produced water of the system can be recycled to an industrial circulating water system, the generated solid salt can be used for extracting bromine, the corrosion of bromine to the device is avoided, and the full recycling of the bromine is realized.
(2) In the invention, the temperature reduction is not needed in the wastewater treatment process, the initial heat of the bromine salt-containing wastewater is fully utilized, the thermal efficiency is improved, and the energy consumption required by the wastewater treatment is reduced.
(3) In the invention, the membrane distillation effluent is clean, and the membrane distillation effluent does not need to be returned for further reverse osmosis treatment, so that the treatment load of a reverse osmosis unit is reduced; the wastewater can be concentrated to a near-saturation state under low pressure, the treatment load of an evaporative crystallization unit is reduced, the use amount of steam is greatly reduced, the energy consumption is greatly reduced, and the problem that the bromine-containing salt wastewater is easy to corrode metal pipeline equipment under a high-pressure condition is avoided.
(4) The method provided by the invention does not need to use a large amount of organic solvent, avoids secondary pollution to the environment and reduces the cost.
Drawings
FIG. 1 is a flow chart of the treatment method of brominated butyl rubber waste water containing bromine salt.
Description of the reference numerals
1. Adjusting the water tank; 2. a flocculation sedimentation tank; 3. a dissolved air flotation device; 4. a multi-media filter; 5. an ultrafiltration device; 6. a nanofiltration device; 7. a reverse osmosis unit; 8. a membrane distillation unit; 9. an evaporative crystallization unit; 10. a sludge dewatering device; 11. an industrial circulating water system; 12. a softening device.
Brominating butyl rubber bromide salt-containing wastewater; regulating water outlet of the water tank; thirdly, flocculating and precipitating to obtain water; flocculating and settling the sludge; dissolved air floatation sludge; sixthly, recovering water; seventh, sludge; eighthly, dissolved air flotation water discharging; ninthly, filtering the water by multiple media; backwashing the R multimedia filter to discharge water;
Figure BDA0002954362840000041
water is obtained through ultrafiltration;
Figure BDA0002954362840000042
backwashing the ultrafiltration device to discharge water;
Figure BDA0002954362840000043
nanofiltration water outlet;
Figure BDA0002954362840000044
nanofiltration of concentrated water;
Figure BDA0002954362840000045
reverse osmosis concentrated water;
Figure BDA0002954362840000046
reverse osmosis yielding water;
Figure BDA0002954362840000047
high-concentration brine;
Figure BDA0002954362840000048
membrane distillation yielding water;
Figure BDA0002954362840000049
condensing the steam;
Figure BDA00029543628400000410
softening the effluent;
Figure BDA00029543628400000411
a solid salt.
Detailed Description
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For numerical ranges, each range between its endpoints and individual point values, and each individual point value can be combined with each other to give one or more new numerical ranges, and such numerical ranges should be construed as specifically disclosed herein.
The invention provides a method for treating bromine-containing salt wastewater of brominated butyl rubber, which is characterized by comprising the following steps:
(1) homogenizing brominated butyl rubber bromide salt-containing wastewater, and sequentially performing flocculation precipitation, dissolved air floatation treatment, multi-medium filtration, ultrafiltration and nanofiltration treatment to obtain nanofiltration effluent and nanofiltration concentrated water;
(2) carrying out reverse osmosis treatment on the nanofiltration effluent obtained in the step (1) to obtain reverse osmosis effluent and reverse osmosis concentrated water;
(3) carrying out membrane distillation treatment on the reverse osmosis concentrated water obtained in the step (2) to obtain membrane distilled water and high-concentration brine;
(4) and (4) evaporating and crystallizing the high-concentration brine obtained in the step (3) to obtain solid salt and steam condensate.
In the treatment method of the brominated butyl rubber bromine salt-containing wastewater, the zero emission of the wastewater is achieved by coupling pretreatment, reverse osmosis, membrane distillation and evaporative crystallization technologies, the system effluent can be recycled to an industrial circulating water system, and the generated solid salt can be used for extracting bromine.
Particularly, in the treatment method provided by the invention, the waste water does not need to be cooled, the initial heat of the waste water containing the bromine salt is fully utilized, and the heat efficiency is improved. And the membrane distillation effluent obtained by the membrane distillation treatment is clean, and does not need to be further subjected to reverse osmosis treatment, so that the treatment load of a reverse osmosis unit is reduced, the wastewater can be concentrated to a nearly saturated state under low pressure, the treatment load of an evaporation crystallization unit is reduced, the use amount of steam is greatly reduced, the energy consumption is greatly reduced, and the problem that the bromine salt-containing wastewater is easy to corrode metal pipeline equipment under a high-pressure condition is avoided.
According to the invention, most of rubber particles, stearate and other suspended matters in the homogenized brominated butyl rubber bromide-containing salt wastewater can be removed through flocculation precipitation treatment and dissolved air floatation treatment.
In the invention, the dissolved air flotation effluent is sequentially subjected to multi-medium filtration, ultrafiltration and nanofiltration treatment, so that most of suspension, colloid, bacteria, part of macromolecular organic matters and most of Ca in the dissolved air flotation effluent can be separated 2+ 、Mg 2+ And the like, so as to prevent the generation of calcium carbonate, calcium sulfate and other precipitates from polluting the membrane in the subsequent concentration process.
According to the invention, the method further comprises: in the step (1), the flocculated sludge obtained by the flocculation treatment and the dissolved air floatation sludge obtained by the dissolved air floatation treatment are dehydrated to obtain sludge and recovered water.
According to the invention, the method further comprises: in the step (1), part of the multi-medium filtered water returns to the multi-medium filter to carry out backwashing on the multi-medium filter, and the multi-medium filter backwashing water is obtained.
According to the invention, the method further comprises: and (2) in the step (1), returning part of the ultrafiltration effluent to the backwashing ultrafiltration device to backwash the ultrafiltration device to obtain the backwashing effluent of the ultrafiltration device.
In the present invention, the amounts of the multimedia filtered effluent for backwashing the multimedia filter and the ultrafiltration effluent for backwashing the ultrafiltration device are not particularly limited, and can be adjusted by those skilled in the art based on actual needs.
According to the invention, the method further comprises: and (2) returning the recovered water, the multi-media filter backwashing water and the ultrafiltration device backwashing effluent to the step (1), and mixing and homogenizing the recovered water, the multi-media filter backwashing water and the ultrafiltration device backwashing effluent.
According to the invention, the method further comprises: in the step (1), softening treatment is carried out on the nanofiltration concentrated water to obtain softened outlet water.
According to the invention, preferably, the softened effluent is returned to the ultrafiltration device.
According to the invention, the softening treatment is preferably carried out by the caustic process and/or the lime-soda process.
According to the invention, the temperature of the brominated butyl rubber bromide salt-containing wastewater is 70-90 ℃, and the concentration of bromide salt is 1-10g/L by taking the total weight of the brominated butyl rubber bromide salt-containing wastewater as a reference.
According to the invention, in step (1), the homogenization treatment is carried out for a period of time ranging from 4 to 12 hours, preferably from 6 to 10 hours.
According to the invention, in the step (1), the flocculating agent for flocculation precipitation treatment is selected from polyaluminium chloride and/or polyferric sulfate, and the concentration of the flocculating agent is 100-1000ppm, preferably 100-500 ppm.
According to the invention, in the step (1), the dissolved air flotation treatment time is 0.5-3h, preferably 1-2 h.
According to the invention, in the step (1), the temperature of the multi-medium filtered water is 50-65 ℃.
According to the present invention, in step (1), the nanofiltration treatment preferably has a water yield of 80 to 90% for Ca 2+ 、Mg 2+ The retention of (a) is at least 80%, preferably not less than 90%.
According to the invention, in the step (2), the water yield of the reverse osmosis treatment is set to be 70-80%; the temperature of the reverse osmosis concentrated water is 47-58 ℃.
According to the present invention, in the step (3), the membrane distillation treatment is preferably vacuum membrane distillation.
According to the invention, the vacuum degree of the membrane distillation treatment is 0.06-0.098MPa, preferably 0.08-0.098 MPa.
According to the invention, the membrane material of the membrane distillation treatment is selected from polypropylene and/or polyvinylidene fluoride.
According to the invention, the membrane material of the membrane distillation treatment has an average pore diameter of 0.01-1 μm; the porosity is 50-90%.
Further, the average pore diameter of the membrane material subjected to membrane distillation treatment is 0.1-0.5 μm; the porosity is 60-80%.
According to the invention, the mass concentration of the bromine salt is 190-400g/L, preferably 250-350g/L based on the total weight of the high-concentration brine.
According to the invention, the method further comprises: and (3) conveying the reverse osmosis effluent obtained in the step (2), the membrane distilled water obtained in the step (3) and the steam condensate obtained in the step (4) to an industrial circulating water system.
The invention provides a brominated butyl rubber bromide salt-containing wastewater treatment system, which is characterized by comprising a pretreatment unit, a reverse osmosis unit, a membrane distillation unit and an evaporative crystallization unit;
the pretreatment unit comprises a regulating water tank, a flocculation sedimentation tank, a dissolved air floatation device, a multi-medium filter, an ultrafiltration device and a nanofiltration device;
the regulating water tank is used for homogenizing the brominated butyl rubber bromine-salt-containing wastewater to obtain outlet water of the regulating water tank;
the flocculation sedimentation tank is used for performing flocculation sedimentation on the effluent from the regulating water tank to obtain the effluent of the flocculation sedimentation tank and sludge of the flocculation sedimentation tank;
the dissolved air flotation device is used for carrying out dissolved air flotation treatment on the effluent of the flocculation sedimentation tank from the flocculation sedimentation tank to obtain dissolved air flotation effluent and dissolved air flotation sludge;
the multi-media filter is used for carrying out multi-media filtering treatment on the dissolved air floatation effluent from the dissolved air floatation device to obtain multi-media filtered effluent;
the ultrafiltration device is used for carrying out ultrafiltration treatment on the filtered water from the multi-media filter to obtain ultrafiltration outlet water;
the nanofiltration device is used for carrying out nanofiltration treatment on the ultrafiltration effluent from the ultrafiltration device to obtain nanofiltration effluent and nanofiltration concentrated water;
the reverse osmosis unit is used for performing reverse osmosis treatment on nanofiltration effluent from the nanofiltration device to obtain reverse osmosis effluent and reverse osmosis concentrated water;
the membrane distillation unit is used for carrying out membrane distillation treatment on reverse osmosis concentrated water from the reverse osmosis unit to obtain membrane distilled water and high-concentration brine;
the evaporative crystallization unit is used for carrying out evaporative crystallization treatment on the high-concentration brine from the membrane distillation unit to obtain solid salt and steam condensate.
In the invention, the membrane assemblies of the ultrafiltration device, the nanofiltration device and the reverse osmosis unit are respectively and independently high-temperature resistant assemblies, and preferably, the membrane assemblies of the ultrafiltration device, the nanofiltration device and the reverse osmosis unit are respectively and independently applicable to high-temperature conditions of more than or equal to 70 ℃.
Further, the preprocessing unit further includes: a sludge dewatering device and a softening device.
According to the invention, the sludge dewatering device is used for dewatering the flocculation sedimentation sludge from the flocculation sedimentation tank and the dissolved air floatation sludge from the dissolved air floatation device to obtain sludge and reclaimed water.
And further, returning the recovered water to a regulating water tank, and mixing and homogenizing the recovered water and the bromine-containing waste water of the brominated butyl rubber.
According to the invention, the softening device is used for softening the nanofiltration concentrated water from the nanofiltration device to obtain softened outlet water.
Further, the softened effluent is returned to the ultrafiltration device, mixed with the multimedia filtered effluent from the multimedia filter, and subjected to ultrafiltration treatment.
Further, the system of the present invention further comprises: and backwashing the multi-medium filter by adopting part of multi-medium filtered water to obtain the backwashing water of the multi-medium filter.
According to the invention, backwashing is carried out on the ultrafiltration device by adopting part of ultrafiltration effluent to obtain backwashing effluent of the ultrafiltration device.
Further, the recovered water, the back washing water of the multi-media filter and the back washing water of the ultrafiltration device return to an adjusting water tank, and are mixed and homogenized with the bromine salt-containing waste water of the brominated butyl rubber.
In one embodiment of the invention, the reverse osmosis effluent, the membrane distillate water and the steam condensate are fed to an industrial circulating water system.
The third aspect of the invention provides a treatment method of the brominated butyl rubber bromide-salt-containing wastewater and an application of the brominated butyl rubber bromide-salt-containing wastewater treatment system in treatment of brominated butyl rubber bromide-salt-containing wastewater.
As shown in FIG. 1, one embodiment of the present invention, is brominated butyl rubber bromide salt-containing waste water and the filtrate from the M & R multimedia filter 4 and the filtrate from the ultrafiltration device 6
Figure BDA0002954362840000091
Mixing and homogenizing outlet water of the ultrafiltration backwashing and reclaimed water from a sludge dewatering device 10 in a regulating water tank 1 to obtain outlet water of the regulating water tank; adjusting the water outlet of the water tank, conveying the water outlet to a flocculation sedimentation tank 2, and performing flocculation sedimentation treatment to obtain flocculation sedimentation water outlet and flocculation sedimentation sludge; thirdly, conveying the flocculated and precipitated effluent to a dissolved air flotation device 3 for dissolved air flotation treatment to obtain dissolved air flotation sludge and dissolved air flotation effluent; flocculating settling sludge and dissolving gasConveying the floating sludge to a sludge dewatering device 10 for sludge dewatering treatment to obtain water recovery and sludge; eighthly, conveying the dissolved air floatation effluent to a multimedia filter 4 for multimedia filtering treatment to obtain nintendo multimedia filtered effluent, wherein part of nintendo multimedia filtered effluent is used for backwashing the multimedia filter 4 to obtain the nrom multimedia filtered backwashing effluent; the rest ninthly multimedia filtered water and water coming from the water softening device 12
Figure BDA0002954362840000092
Delivering the softened effluent to an ultrafiltration device 5 for ultrafiltration treatment to obtain
Figure BDA0002954362840000093
Ultrafiltering to obtain water, part
Figure BDA0002954362840000094
The ultrafiltration effluent is used for backwashing the ultrafiltration device 5 to obtain
Figure BDA0002954362840000095
Ultrafiltration and backwashing to discharge water; the rest(s)
Figure BDA0002954362840000096
The ultrafiltration effluent is conveyed to a nanofiltration device 6 for nanofiltration treatment to obtain
Figure BDA0002954362840000097
Filtered water and sodium hydroxide
Figure BDA0002954362840000098
Nanofiltration of concentrated water;
Figure BDA0002954362840000099
conveying the nanofiltration concentrated water to a water softening device 12 for softening treatment to obtain
Figure BDA00029543628400000910
Softening the effluent;
Figure BDA0002954362840000101
conveying the nanofiltration effluent to a reverse osmosis unit 7 for reverse osmosis treatment to obtain
Figure BDA0002954362840000102
Reverse osmosis concentrate and
Figure BDA0002954362840000103
reverse osmosis yielding water;
Figure BDA0002954362840000104
conveying the reverse osmosis concentrated water to a membrane distillation unit 8 for membrane distillation treatment to obtain
Figure BDA0002954362840000105
High concentrated brine and
Figure BDA0002954362840000106
membrane distillation yielding water;
Figure BDA0002954362840000107
delivering the high-concentration brine to an evaporation crystallization unit 9 for crystallization treatment to obtain
Figure BDA0002954362840000108
Solid salts and
Figure BDA0002954362840000109
and condensing the steam.
Figure BDA00029543628400001010
The reverse osmosis effluent,
Figure BDA00029543628400001011
Membrane distilled water and
Figure BDA00029543628400001012
and conveying the steam condensate to an industrial circulating water system.
The present invention will be described in detail below by way of examples. In the following examples, the bromine salt-containing wastewater generated from the preparation of bromobutyl rubber by a certain company was used as raw water, and the specific water quality data analysis is shown in table 1:
table 1 raw water quality data
Index (I) Unit of Numerical range
Temperature of ℃ 70-90
Total suspended matter mg/L 20-300
Ca 2+ mg/L 3-16
COD mg/L 1200-3100
Br- g/L 1.5-3.9
Mg 2+ mg/L 0.5-5
pH - 8-11
Ammonia nitrogen mg/L 120-180
Turbidity of water - 100-350
SO 4 2- mg/L 20-80
In the following examples, the ultrafiltration membrane module was DURATHERM EXL UF 28040 (80 ℃ maximum operating temperature), the nanofiltration membrane module was DURATHERM EXL NF8040HR (80 ℃ maximum operating temperature, 98% rejection for magnesium sulfate), and the reverse osmosis membrane module was DURATHERM EXL RO8040HR (80 ℃ maximum operating temperature).
The relevant data in the examples were obtained with the following test instruments and calculation methods:
(1) total suspended matter: measured according to GB/T11901-1989 standard;
(2) anion: adopting an ICS-2000 ion chromatograph of Thermo scientific;
(3) cation: adopting an ICS-5000 ion chromatograph of Thermo scientific;
(4) COD: measured by potassium dichromate open reflux titration;
(5) pH: measured according to GB6920-1986 standard;
(6) ammonia nitrogen: measured according to HJ535-2009 standard;
(7) turbidity: adopting a portable turbidity meter SGZ-200B held by Shanghai Yuefeng;
(8) water yield is the effluent flow rate/influent flow rate.
Example 1
(1) A pretreatment unit: mixing and homogenizing the brominated butyl rubber bromide salt-containing wastewater, multi-medium filtering backwashing effluent from a multi-medium filter, ultrafiltration backwashing effluent from an ultrafiltration device and recovered water from a sludge dewatering device in a regulating water tank (the retention time is 4 hours) to obtain regulating water tank effluent; adjusting the water outlet of the water tank, conveying the water outlet to a flocculation sedimentation tank for flocculation sedimentation treatment to obtain flocculation sedimentation water and flocculation sedimentation sludge, wherein the used flocculating agent is polyaluminium chloride, and the concentration of the flocculating agent is 500 ppm; conveying the flocculated and precipitated effluent to a dissolved air floatation device (the retention time is 0.5h) for dissolved air floatation treatment to obtain dissolved air floatation sludge and dissolved air floatation effluent; conveying the flocculated precipitated sludge and the dissolved air floatation sludge to a sludge dewatering device for sludge dewatering treatment to obtain recovered water and sludge; conveying the dissolved air floatation effluent to a multi-medium filter for multi-medium filtering treatment to obtain multi-medium filtered effluent; part of the multimedia filtered effluent is used for backwashing the multimedia filter to obtain multimedia filtered backwashing effluent; conveying the rest multi-medium filtered water (with the temperature of 60-65 ℃) and softened water from the softening device to an ultrafiltration device for ultrafiltration treatment to obtain ultrafiltration water; part of the ultrafiltration effluent is used for backwashing the ultrafiltration device to obtain ultrafiltration backwashing effluent; conveying the rest of the ultrafiltration effluent to a nanofiltration device for nanofiltration treatment to obtain nanofiltration effluent and nanofiltration concentrated water, wherein the water yield of the nanofiltration device is set to be 90%; conveying the nanofiltration concentrated water to a softening device and softening by adopting a caustic soda method to obtain softened outlet water.
(2) A reverse osmosis unit: conveying the nanofiltration effluent to a reverse osmosis unit for reverse osmosis treatment to obtain reverse osmosis concentrated water and reverse osmosis effluent; the water production rate of the reverse osmosis unit was set to 80%.
(3) A membrane distillation unit: conveying reverse osmosis concentrated water (with the temperature of 53-58 ℃) to a membrane distillation unit for membrane distillation treatment to obtain high concentrated brine and membrane distillation effluent; a polytetrafluoroethylene membrane component (with the average pore diameter of 1 mu m and the porosity of 60%) with the model number of TF1000 manufactured by Gelman company is selected for vacuum membrane distillation, and the vacuum degree is 0.098 MPa.
(4) An evaporation crystallization unit: and conveying the high-concentration brine to an evaporation crystallization unit for crystallization treatment to obtain solid salt and steam condensate.
And (4) conveying reverse osmosis effluent, membrane distillation effluent and steam condensate to an industrial circulating water system.
Example 2
(1) A pretreatment unit: mixing and homogenizing the brominated butyl rubber bromide salt-containing wastewater, multi-medium filtering backwashing effluent from a multi-medium filter, ultrafiltration backwashing effluent from an ultrafiltration device and recovered water from a sludge dewatering device in a regulating water tank (the retention time is 12 hours) to obtain regulating water tank effluent; adjusting the water outlet of the water tank, conveying the water outlet to a flocculation sedimentation tank for flocculation sedimentation treatment to obtain flocculation sedimentation water and flocculation sedimentation sludge, wherein the used flocculating agent is polyaluminium chloride, and the concentration of the flocculating agent is 1000 ppm; conveying the flocculated and precipitated effluent to a dissolved air floatation device (the retention time is 3h) for dissolved air floatation treatment to obtain dissolved air floatation sludge and dissolved air floatation effluent; conveying the flocculated precipitated sludge and the dissolved air floatation sludge to a sludge dewatering device for sludge dewatering treatment to obtain recovered water and sludge; conveying the dissolved air floatation effluent to a multi-media filter for multi-media filtering treatment to obtain multi-media filtered effluent; part of the multimedia filtered effluent is used for backwashing the multimedia filter to obtain multimedia filtered backwashing effluent; conveying the rest multi-medium filtered effluent (with the temperature of 50-55 ℃) and softened effluent from the water softening device to an ultrafiltration device for ultrafiltration treatment to obtain ultrafiltration effluent; part of the ultrafiltration effluent is used for backwashing the ultrafiltration device to obtain ultrafiltration backwashing effluent; conveying the rest of the ultrafiltration effluent to a nanofiltration device for nanofiltration treatment to obtain nanofiltration effluent and nanofiltration concentrated water, wherein the water yield of the nanofiltration device is set to be 80%; conveying the nanofiltration concentrated water to a water softening device, and softening by adopting a caustic soda method to obtain softened outlet water.
(2) A reverse osmosis unit: conveying the nanofiltration effluent to a reverse osmosis unit for reverse osmosis treatment to obtain reverse osmosis concentrated water and reverse osmosis effluent; the water production rate of the reverse osmosis unit was set at 75%.
(3) A membrane distillation unit: conveying reverse osmosis concentrated water (at 47-52 ℃) to a membrane distillation unit for membrane distillation treatment to obtain high concentrated brine and membrane distillation effluent; a polytetrafluoroethylene membrane component (with the average pore diameter of 0.45 mu m and the porosity of 60%) with the model number of TF450 of Gelman company is selected for vacuum membrane distillation, and the vacuum degree is 0.06 MPa.
(4) An evaporation crystallization unit: and conveying the high-concentration brine to an evaporation crystallization unit for crystallization treatment to obtain solid salt and steam condensate.
And (4) conveying reverse osmosis effluent, membrane distillation effluent and steam condensate to an industrial circulating water system.
Example 3
(1) A pretreatment unit: mixing and homogenizing the brominated butyl rubber bromide salt-containing wastewater, multi-medium filtering backwashing effluent from a multi-medium filter, ultrafiltration backwashing effluent from an ultrafiltration device and recovered water from a sludge dewatering device in a regulating water tank (the retention time is 8 hours) to obtain regulating water tank effluent; adjusting the water outlet of the water tank, conveying the water outlet to a flocculation sedimentation tank for flocculation sedimentation treatment to obtain flocculation sedimentation water and flocculation sedimentation sludge, wherein the used flocculating agent is polyaluminium chloride, and the concentration of the flocculating agent is 100 ppm; conveying the flocculated and precipitated effluent to a dissolved air floatation device (the retention time is 1h) for dissolved air floatation treatment to obtain dissolved air floatation sludge and dissolved air floatation effluent; conveying the flocculated precipitated sludge and the dissolved air floatation sludge to a sludge dewatering device for sludge dewatering treatment to obtain recovered water and sludge; conveying the dissolved air floatation effluent to a multi-medium filter for multi-medium filtering treatment to obtain multi-medium filtered effluent; part of the multimedia filtered effluent is used for backwashing the multimedia filter to obtain multimedia filtered backwashing effluent; conveying the rest multi-medium filtered effluent (with the temperature of 55-60 ℃) and softened effluent from the water softening device to an ultrafiltration device for ultrafiltration treatment to obtain ultrafiltration effluent; part of the ultrafiltration effluent is used for backwashing the ultrafiltration device to obtain ultrafiltration backwashing effluent; conveying the rest of the ultrafiltration effluent to a nanofiltration device for nanofiltration treatment to obtain nanofiltration effluent and nanofiltration concentrated water, wherein the water yield of the nanofiltration device is set to be 85%; conveying the nanofiltration concentrated water to a water softening device, and softening by adopting a caustic soda method to obtain softened outlet water.
(2) A reverse osmosis unit: conveying the nanofiltration effluent to a reverse osmosis unit for reverse osmosis treatment to obtain reverse osmosis concentrated water and reverse osmosis effluent; the water production rate of the reverse osmosis unit was set at 70%.
(3) A membrane distillation unit: conveying reverse osmosis concentrated water (with the temperature of 50-55 ℃) to a membrane distillation unit for membrane distillation treatment to obtain high concentrated brine and membrane distillation effluent; a polypropylene membrane module with the thickness of 100 mu m, the average pore diameter of 0.2 mu m and the porosity of 75 percent, which is manufactured by Enka company, is selected for vacuum membrane distillation, and the vacuum degree is 0.095 MPa.
(4) An evaporation crystallization unit: and conveying the high-concentration brine to an evaporation crystallization unit for crystallization treatment to obtain solid salt and steam condensate.
And (4) conveying reverse osmosis effluent, membrane distillation effluent and steam condensate to an industrial circulating water system.
Example 4
Brominated butyl rubber bromide-containing salt wastewater was treated in the same manner as in example 1, except that: the degree of vacuum of the membrane distillation treatment was 0.04 MPa.
Example 5
Brominated butyl rubber bromide-containing salt wastewater was treated in the same manner as in example 1, except that: the membrane distillation treatment selects a polypropylene membrane component with the average aperture of 0.2 mu m and the porosity of 40 percent of Hangzhou Hongquan membrane technology Limited company.
Example 6
Brominated butyl rubber bromide-containing salt wastewater was treated in the same manner as in example 1, except that: direct contact membrane distillation is selected, and the temperature of circulating water used by a cold side membrane surface is 25 ℃.
Comparative example 1
Brominated butyl rubber bromide-containing salt wastewater was treated in the same manner as in example 1, except that: no membrane distillation unit is included.
Comparative example 2
Brominated butyl rubber bromide-containing salt wastewater was treated in the same manner as in example 1, except that: and replacing the membrane distillation unit with electrodialysis treatment, returning electrodialysis effluent to the reverse osmosis unit, and feeding electrodialysis concentrated water into the evaporation crystallization unit.
The water quality of the reverse osmosis effluent, the water quality of the membrane distillation effluent and the concentration of bromine salt in the high concentration brine in examples 1 to 6 and comparative examples 1 to 2 are shown in tables 2 to 4, respectively.
TABLE 2 reverse osmosis effluent quality
Index (I) Unit of Example 1 Example 2 Example 3
Total suspended matter mg/L 0-1 0-1 0-1
Ca 2+ mg/L 0.1-1 0.1-1.5 0.1-1.4
COD mg/L 10-20 10-18 9-20
Br - g/L 0.20-0.25 0.19-0.22 0.18-0.21
Mg 2+ mg/L 0.1-1 0.1-0.4 0.1-0.5
pH - 8-9 8-9 8-9
Ammonia nitrogen mg/L 2-9 3-9 3-8
Turbidity of water - 0-0.1 0-0.1 0-0.1
SO 4 2- mg/L 0.5-5 0.5-5 1-4
In examples 4 to 6 and comparative examples 1 to 2, the reverse osmosis effluent quality was the same as that of example 1.
TABLE 3 quality of the membrane distilled effluent
Index (I) Unit of Example 1 Example 2 Example 3 Example 4
Total suspended matter mg/L 0-1 0-1 0-1 0-1
Ca 2+ mg/L 0.1-0.5 0.1-0.8 0.1-0.5 0.1-1.5
COD mg/L 8-15 10-18 10-15 15-30
Br - g/L 0.02-0.05 0.03-0.08 0.03-0.07 0.08-0.15
Mg 2+ mg/L 0.1-0.5 0.1-1 0.1-0.8 0.1-1
pH - 8-9 8-9 8-9 8-9
Ammonia nitrogen mg/L 1-5 2-8 2-6 2-10
Turbidity of water - 0-0.1 0-0.1 0-0.1 0-0.1
SO 4 2- mg/L 0.5-1 0.5-2 0.5-2 1.0-6
TABLE 3 quality of the effluent from membrane distillation
Index (I) Unit of Example 5 Example 6
Total suspended matter mg/L 0-1 0-1
Ca 2+ mg/L 0.2-1.7 0.1-1.5
COD mg/L 18-28 20-32
Br - g/L 0.08-0.18 0.08-0.14
Mg 2+ mg/L 0.2-1 0.2-0.9
pH - 8-9 8-9
Ammonia nitrogen mg/L 4-10 3-9
Turbidity of water - 0-0.1 0-0.1
SO 4 2- mg/L 1.5-5.5 1.5-5
TABLE 4 bromine salt concentration in high strength brine
Index (I) Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Comparative example 1 Comparative example 2
Bromine salt concentration, g/L 250 350 300 200 190 250 10 40
As can be seen from tables 2 to 4, after the brominated butyl rubber bromine salt-containing wastewater is subjected to pretreatment, reverse osmosis and membrane distillation in sequence by adopting the treatment method provided by the invention, the contents of bromine salt, COD and the like in the obtained reverse osmosis effluent and membrane distillation effluent are remarkably reduced, and the obtained reverse osmosis effluent and membrane distillation effluent can be recycled into an industrial circulating water system, and meanwhile, high-concentration brine with high bromine salt concentration is generated. The higher the bromine salt concentration in the high-concentration brine entering the evaporative crystallization unit, the lower the energy consumption of the evaporative crystallization unit, therefore, the method and the system provided by the invention can realize zero emission of bromine-containing wastewater of the bromobutyl device with high efficiency and low energy consumption.
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including various technical features being combined in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.

Claims (13)

1. A treatment method of brominated butyl rubber waste water containing bromine salt is characterized by comprising the following steps:
(1) homogenizing brominated butyl rubber bromide salt-containing wastewater, and sequentially performing flocculation precipitation, dissolved air floatation treatment, multi-medium filtration, ultrafiltration and nanofiltration treatment to obtain nanofiltration effluent and nanofiltration concentrated water;
(2) carrying out reverse osmosis treatment on the nanofiltration effluent obtained in the step (1) to obtain reverse osmosis effluent and reverse osmosis concentrated water;
(3) carrying out membrane distillation treatment on the reverse osmosis concentrated water obtained in the step (2) to obtain membrane distilled water and high-concentration brine;
(4) and (4) evaporating and crystallizing the high-concentration brine obtained in the step (3) to obtain solid salt and steam condensate.
2. The processing method of claim 1, wherein the method further comprises: in the step (1), the flocculated and precipitated sludge obtained by the flocculated and precipitated treatment and the dissolved air flotation sludge obtained by the dissolved air flotation treatment are dehydrated to obtain sludge and recovered water.
3. The processing method according to claim 1 or 2, wherein the method further comprises: in the step (1), part of the filtered water of the multi-medium is returned to the multi-medium filter to carry out backwashing on the multi-medium filter, so as to obtain the backwashing effluent of the multi-medium filter;
preferably, in the step (1), part of the ultrafiltration effluent is returned to the ultrafiltration device to backwash the ultrafiltration device, so as to obtain the ultrafiltration device backwash effluent.
4. A processing method according to claim 2 or 3, wherein the method further comprises: and (2) returning the recovered water, the multi-media filter backwashing water and the ultrafiltration device backwashing effluent to the step (1), and mixing and homogenizing the recovered water, the multi-media filter backwashing water and the ultrafiltration device backwashing effluent.
5. The processing method according to any one of claims 1 to 4, wherein the method further comprises: softening the nanofiltration concentrated water to obtain softened outlet water in the step (1);
preferably, the softened effluent is returned to the ultrafiltration device;
preferably, the softening treatment is carried out using a caustic process and/or a lime-soda process.
6. The treatment method according to any one of claims 1 to 5, wherein the temperature of the brominated butyl rubber bromide salt-containing wastewater is 70 to 90 ℃; the concentration of bromine salt is 1-10g/L based on the total weight of the bromine salt-containing waste water of the brominated butyl rubber.
7. The process of any one of claims 1 to 6, wherein in step (1), the homogenization process is carried out for a period of 4 to 12 hours;
preferably, the flocculating agent for the flocculation precipitation treatment is selected from polyaluminium chloride and/or polyferric sulfate; the concentration of the flocculant is 100-1000 ppm;
preferably, the dissolved air flotation treatment time is 0.5-3 h;
preferably, the temperature of the multi-medium filtered water is 50-65 ℃;
preferably, the nanofiltration treatment has a water yield of 80-90% for Ca 2+ 、Mg 2+ The retention of (a) is at least 80%.
8. The treatment method according to any one of claims 1 to 7, wherein the water production rate of the reverse osmosis treatment in step (2) is set to 70% to 80%.
Preferably, the temperature of the reverse osmosis concentrated water is 47-58 ℃.
9. The process according to any one of claims 1 to 8, wherein, in the step (3), the membrane distillation is vacuum membrane distillation; preferably, the vacuum degree of the membrane distillation treatment is 0.06-0.098 MPa;
preferably, the membrane material of the membrane distillation treatment is selected from polypropylene and/or polyvinylidene fluoride;
preferably, the membrane distillation processed membrane material has an average pore diameter of 0.01-1 μm; the porosity is 50-90%;
preferably, the mass concentration of the bromine salt is 190-400g/L based on the total weight of the high-concentration brine.
10. The processing method according to any one of claims 1 to 9, wherein the method further comprises: and (3) conveying the reverse osmosis effluent obtained in the step (2), the membrane distilled water obtained in the step (3) and the steam condensate obtained in the step (4) to an industrial circulating water system.
11. A brominated butyl rubber bromide salt-containing wastewater treatment system is characterized by comprising a pretreatment unit, a reverse osmosis unit, a membrane distillation unit and an evaporation crystallization unit;
the pretreatment unit comprises a regulating water tank, a flocculation sedimentation tank, a dissolved air floatation device, a multi-medium filter, an ultrafiltration device and a nanofiltration device;
the regulating water tank is used for homogenizing the brominated butyl rubber bromine-salt-containing wastewater to obtain outlet water of the regulating water tank;
the flocculation sedimentation tank is used for performing flocculation sedimentation on the effluent from the regulating water tank to obtain the effluent of the flocculation sedimentation tank and sludge of the flocculation sedimentation tank;
the dissolved air flotation device is used for carrying out dissolved air flotation treatment on the flocculated and precipitated effluent from the flocculated and precipitated tank to obtain dissolved air flotation effluent and dissolved air flotation sludge;
the multi-media filter is used for filtering the dissolved air floatation water from the dissolved air floatation device to obtain multi-media filtered water;
the ultrafiltration device is used for carrying out ultrafiltration treatment on the multi-medium filtered water from the multi-medium filter to obtain ultrafiltration outlet water;
the nanofiltration device is used for carrying out nanofiltration treatment on the ultrafiltration effluent from the ultrafiltration device to obtain nanofiltration effluent and nanofiltration concentrated water;
the reverse osmosis unit is used for performing reverse osmosis treatment on nanofiltration effluent from the nanofiltration device to obtain reverse osmosis effluent and reverse osmosis concentrated water;
the membrane distillation unit is used for carrying out membrane distillation treatment on the reverse osmosis concentrated water from the reverse osmosis unit to obtain membrane distilled water and high-concentration brine;
the evaporative crystallization unit is used for carrying out evaporative crystallization treatment on the high-concentration brine from the membrane distillation unit to obtain solid salt and steam condensate.
12. The system of claim 11, wherein the pretreatment unit further comprises a sludge dewatering device and a softening device;
the sludge dewatering device is used for dewatering the flocculation sedimentation sludge from the flocculation sedimentation tank and the dissolved air floatation sludge from the dissolved air floatation device to obtain sludge and reclaimed water;
the softening device is used for softening nanofiltration concentrated water from the nanofiltration device to obtain softened outlet water;
preferably, the softened effluent is returned to the ultrafiltration device, mixed with the multimedia filtrate effluent from the multimedia filter, and subjected to ultrafiltration treatment.
13. Use of the brominated butyl rubber bromide-salt-containing wastewater treatment method according to any one of claims 1 to 10 and the brominated butyl rubber bromide-salt-containing wastewater treatment system according to claim 11 or 12 in treatment of brominated butyl rubber bromide-salt-containing wastewater.
CN202110219935.9A 2021-02-26 2021-02-26 Treatment method and system for bromine-containing salt wastewater of brominated butyl rubber and application thereof Pending CN114956416A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105540967A (en) * 2015-12-09 2016-05-04 大唐国际化工技术研究院有限公司 Processing method for reducing and recycling organic waste water and processing system
CN108726769A (en) * 2017-04-24 2018-11-02 中国石油化工股份有限公司 A kind of advanced treatment and reclamation method of flue gas desulfurization liquid
CN112225407A (en) * 2020-10-26 2021-01-15 山东光华纸业集团有限公司 High enriched brine integrated processing system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105540967A (en) * 2015-12-09 2016-05-04 大唐国际化工技术研究院有限公司 Processing method for reducing and recycling organic waste water and processing system
CN108726769A (en) * 2017-04-24 2018-11-02 中国石油化工股份有限公司 A kind of advanced treatment and reclamation method of flue gas desulfurization liquid
CN112225407A (en) * 2020-10-26 2021-01-15 山东光华纸业集团有限公司 High enriched brine integrated processing system

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