CN105585195A - Coal chemical high-salinity wastewater treatment and recycling system - Google Patents
Coal chemical high-salinity wastewater treatment and recycling system Download PDFInfo
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- CN105585195A CN105585195A CN201610055321.0A CN201610055321A CN105585195A CN 105585195 A CN105585195 A CN 105585195A CN 201610055321 A CN201610055321 A CN 201610055321A CN 105585195 A CN105585195 A CN 105585195A
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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
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/04—Chlorides
- C01D3/06—Preparation by working up brines; seawater or spent lyes
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
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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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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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
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a coal chemical high-salinity wastewater treatment and recycling system. The system comprises a water softener, an ultra-filtration unit and a nano-filtration unit which are arranged in sequence, wherein the liquid inlet and filtrate outlet of the ultra-filtration unit are respectively connected with the soft water outlet of the water softener and the inlet end of the nano-filtration unit; and the permeate outlet and concentrate outlet of the nano-filtration unit respectively lead to first and second evaporation and concentration units. When the coal chemical high-salinity wastewater treatment and recycling system is used, high-salinity wastewater is softened to reduce the hardness, the softened wastewater is subjected to ultra-filtration treatment of the ultra-filtration unit to remove partial suspended solids and COD in the soft water, sodium chloride and sodium sulfate in the prepared ultra-filtration filtrate can be separated by the Donnan effect of a nano-filtration membrane, and sodium chloride and sodium sulfate crystals can be obtained by means of evaporation and concentration. Compared with the prior art, the system has the advantage that sodium chloride and sodium sulfate crystals can be effectively reclaimed from high-salinity wastewater which is generated in coal chemical industry, and thus wastes can be turned into valuables.
Description
Technical field
The present invention relates to chemical technology field, the processing that is specifically related to a kind of Coal Chemical Industry high-salt wastewater is returnedReceipts system.
Background technology
Chinese energy situation belongs to the few oil type of many coals, therefore coal chemical technology the regeneration of the energy withIn consumption, be seized of critical role. Coal Chemical Industry is taking coal as raw material, through chemical process, coal is transformedFor the process of gas, liquid, solid fuel and chemicals, its mainly comprise coal gasification, liquefaction,Destructive distillation, and the processing of tar etc. The application development of Coal Chemical Industry inevitably can produce a large amount ofWaste water, this is a large feature of Chemical Industry, mainly contains a large amount of organic matters in these waste waterAnd inorganic salts, water quality complexity.
In prior art, Chemical Industry produce waste water treatment step mainly: microorganism is goodOxygen anaerobism → chemical oxidation → reverse osmosis membrane separation, the clear water producing after reverse osmosis membrane separation is straightAccess discharge standard, reverse osmosis concentrated shrink contains inorganic salts and a small amount of COD of 6% left and right,For these high salt reverse osmosis concentration waste water, the treating method that enterprise adopts is that it is directly steamed at presentDry, so that row's wastewater flow rate reduces greatly outward, but for the inorganic salts solid waste producing after evaporate to drynessIt is a great problem of coal chemical industry enterprises processing. Taking the reverse osmosis concentrated shrink of generation 60t per hour as,After adopting said method to process, the annual inorganic salts solid waste producing is up to 30000t, and these inorganic salts are solidGive up and can only, by the processing of dangerization product, bring heavy financial burden to enterprise. Therefore how to solve solid wasteEmission problem, become a large technical bottleneck of coal chemical industry enterprises.
Summary of the invention
The object of this invention is to provide a kind of result of use good, can effectively ensure Resource Rationalization profitWith the processing recovery system of Coal Chemical Industry high-salt wastewater.
For achieving the above object, the technical solution used in the present invention is: a kind of Coal Chemical Industry high-salt wastewaterProcessing recovery system, it is characterized in that: comprise successively water softener, the ultra filtration unit of arranging and receiveFilter unit, the inlet of ultra filtration unit and filtrate (liquid respectively with soft water outlet, the nanofiltration of water softenerThe entrance point of unit is connected, nano-filtration unit see through liquid outlet and concentrated solution outlet lead to respectively theOne, the second evaporation and concentration unit.
The beneficial effect that adopts technique scheme to produce is: when use, by warp in prior artCross the high-salt wastewater obtaining after microorganism aerobic anaerobism, chemical oxidation and reverse osmosis membrane separation are processed logicalEnter in demineralizer, by the softening suction-operated of demineralizer, the hardness of high-salt wastewater declined,The waste water obtaining after softening, can be outstanding by the part in soft water through the hyperfiltration treatment of ultra filtration unitFloating thing and COD remove, and the road southern effect of the ultrafiltrate obtaining like this by NF membrane can be bySodium chloride wherein separates with sodium sulphate, finally by first, second evaporation and concentration unit evaporation and concentrationThereby obtain sodium chloride and sodium sulfate crystal. Compared with prior art, adopt place disclosed by the inventionThe high-salt wastewater that reason system can produce from Chemical Industry effectively, reclaim and obtain qualified chlorineChange sodium and sodium sulphate product, realize the rational utilization of resource, reached the object turning waste into wealth.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
A processing recovery system for Coal Chemical Industry high-salt wastewater, it comprises the water softener of arranging successively10, ultra filtration unit 30 and nano-filtration unit 40, inlet 31 and the filtrate (liquid of ultra filtration unit 3032 are connected with the soft water outlet 12 of water softener 10, the entrance point 41 of nano-filtration unit 40 respectively, receiveThat filters unit 40 leads to respectively first, second evaporation through liquid outlet 42 and concentrated solution outlet 43Upgrading unit 50,60. When use, by process microorganism aerobic anaerobism, chemical oxygen in prior artThe high-salt wastewater that change and reverse osmosis membrane separation obtain after processing is logical from the hard water import 11 of demineralizer 10Enter in demineralizer 10, by the softening suction-operated of demineralizer 10, make the hardness of high-salt wastewaterDecline, concrete, described demineralizer 10 can adopt lime-soda method, strong-acid type sun resin to hand overAny one method such as method and faintly acid sun exchange resin method of changing is softened high-salt wastewater, byHigher by the concentration of calcium ion in the high-salt wastewater of water generates and magnesium ion in Coal Chemical Industry, by softeningThe emollescence of device 10 can be replaced into sodium ion by the calcium ion in high-salt wastewater and magnesium ion, withTime by the free silica Adsorption in high-salt wastewater, so both can avoid calcium ion, magnesium ion withAnd the service life of free silica scale effect equipment in the equipment such as the filtration of postorder, again can simultaneouslyThe filtration of the nano-filtration unit 40 by postorder separates the sodium chloride and the sodium sulphate that obtain high concentration.Specifically, on the one hand through the hyperfiltration treatment of ultra filtration unit 30, can be by the part in soft waterSuspended substance removal, improves colourity requirement, and the COD in soft water can remove 40% in addition, ultrafiltrationThe concentrate content obtaining is few, therefore straight from the dope port of export 33 of ultra filtration unit 30 is dischargedConnect burning disposal; On the other hand for ultrafiltrate, by south, the road effect of NF membrane, itsRejection to monovalent salt and divalent salts is different, therefore can be by the sodium chloride in ultrafiltrate and sulfuric acidSodium separates, and NF membrane is low to the rejection of sodium chloride, therefore by nano-filtration unit 40 afterchlorinatesSodium is to see through NF membrane to see through liquid outlet 42 discharges from it, then through the first evaporation and concentration unit 50Evaporation and concentration and then obtain sodium chloride crystal, sodium sulphate is held back by NF membrane and is gone out from concentrateMouthfuls 43 discharge, then through the second evaporation and concentration unit 60 evaporation and concentration and then obtain sodium sulfate crystal.Compared with prior art, adopt treatment system disclosed by the invention effectively to add high-salt wastewaterTo process, realization is turned waste into wealth.
As further preferred version: be provided with between described water softener 10 and ultra filtration unit 30High pressure reverse osmosis units 20 (being high pressure RO20), the liquid-inlet 21 of high pressure reverse osmosis units 20,Dope outlet 22 respectively with the soft water outlet 12 of water softener 10, the entrance point 41 of nano-filtration unit 40Be connected. The film pressure of entering of high pressure reverse osmosis units 20 is 3.0-8.0MPa, when use, and high pressure reverse osmosisThe purified liquor outlet 12 of unit 20 leads to outer drainage pipeline or water resource recovery channel thoroughly. Pass through high pressureThe clear water that the counter-infiltration of reverse osmosis units 20 obtains is 2/3rds of charging, and these clear water are up to standardDirectly outer row or recycling, so can reduce postorder ultrafiltration, nano-filtration unit greatly30, the processing pressure of 40 workshop sections, after testing, obtains through 20 counter-infiltrations of high pressure reverse osmosis unitsThe total content of sodium chloride, sodium sulphate and COD approximately 6% in dope.
Further, in nano-filtration unit 40, the molecular cut off of membrane component is 100-600D; UltrafiltrationIn unit 30, the molecular cut off of membrane component is 1000-5000D; Described first, second evaporation is denseContracting unit 50,60 is multiple-effect evaporation concentrator or MVR concentrator. Employing said structureUltrafiltration, nano-filtration unit 30,40 and first, second evaporation and concentration unit 50,60 can be effectiveGround is processed high-salt wastewater, after testing, and the chlorine that adopts treatment system disclosed by the invention to obtainThe purity of changing sodium crystal, sodium sulfate crystal reaches respectively more than 95% and more than 97%.
In order to further illustrate result of use of the present invention, taking process 3t high-salt wastewater as, applicationPeople is to adopting the water quality obtaining after each cell processing of the present invention to record detection, and result is as following tableShown in 1.
Claims (5)
1. a processing recovery system for Coal Chemical Industry high-salt wastewater, is characterized in that: comprise successivelyWater softener (10), ultra filtration unit (30) and the nano-filtration unit (40) of arranging, ultra filtration unit (30)Inlet (31) and filtrate (liquid (32) respectively with the soft water outlet (12) of water softener (10),The entrance point (41) of nano-filtration unit (40) is connected, and the liquid that sees through of nano-filtration unit (40) exports (42)And concentrated solution outlet (43) leads to respectively first, second evaporation and concentration unit (50,60).
2. the processing recovery system of Coal Chemical Industry high-salt wastewater according to claim 1, its featureBe: between described water softener (10) and ultra filtration unit (30), be provided with high pressure reverse osmosis units(20), the liquid-inlet (21) of high pressure reverse osmosis units (20), dope outlet (22) are respectivelyWith the soft water outlet (12) of water softener (10) and entrance point (41) phase of nano-filtration unit (40)Connect, the purified liquor outlet (23) of high pressure reverse osmosis units (20) leads to outer drainage pipeline or water resourceRecovery channel.
3. according to the processing recovery system of Coal Chemical Industry high-salt wastewater described in claim 1 or 2, itsBe characterised in that: in nano-filtration unit (40), the molecular cut off of membrane component is 100-600D.
4. the processing recovery system of Coal Chemical Industry high-salt wastewater according to claim 3, its featureBe: in ultra filtration unit (30), the molecular cut off of membrane component is 1000-5000D.
5. the processing recovery system of Coal Chemical Industry high-salt wastewater according to claim 4, its featureBe: described first, second evaporation and concentration unit (50,60) for multiple-effect evaporation concentrator orMVR concentrator.
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| CN201610055321.0A CN105585195A (en) | 2015-11-20 | 2016-01-26 | Coal chemical high-salinity wastewater treatment and recycling system |
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| CN2015209387128 | 2015-11-20 | ||
| CN201520938712 | 2015-11-20 | ||
| CN201610055321.0A CN105585195A (en) | 2015-11-20 | 2016-01-26 | Coal chemical high-salinity wastewater treatment and recycling system |
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| CN201610055321.0A Pending CN105585195A (en) | 2015-11-20 | 2016-01-26 | Coal chemical high-salinity wastewater treatment and recycling system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105836976A (en) * | 2016-06-08 | 2016-08-10 | 北京清源创智科技有限公司 | Comprehensive treatment method of long-chain dialkyl acid crystallization mother liquor |
| CN107311374A (en) * | 2017-05-30 | 2017-11-03 | 毛强平 | The Zero-discharge treating process and device of a kind of coal chemical industrial waste water |
| CN107777815A (en) * | 2016-08-25 | 2018-03-09 | 中煤鄂尔多斯能源化工有限公司 | A kind of processing system and handling process of coal chemical industry strong brine |
| CN107902832A (en) * | 2017-12-15 | 2018-04-13 | 安徽普朗膜技术有限公司 | Sulfate crystal mother liquid disposal system |
| CN110902923A (en) * | 2019-12-04 | 2020-03-24 | 安徽普朗膜技术有限公司 | Treatment and recovery system for high-salinity wastewater in coal chemical industry |
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| CN205387520U (en) * | 2015-11-20 | 2016-07-20 | 安徽普朗膜技术有限公司 | High salt of coal industry treatment of water recovery system that gives up |
| US10427964B2 (en) * | 2016-07-28 | 2019-10-01 | Veolia Water Technologies, Inc. | Enhanced process for selective salt recovery from wastewater, waste salts, and brines |
| CN107902677A (en) * | 2016-12-12 | 2018-04-13 | 威立雅水处理技术公司 | Method for producing potassium sulfate and sodium chloride from waste water |
| CN110872140B (en) * | 2018-09-03 | 2022-06-21 | 中国石油化工股份有限公司 | Hazardous chemical substance separation and recovery system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105836976A (en) * | 2016-06-08 | 2016-08-10 | 北京清源创智科技有限公司 | Comprehensive treatment method of long-chain dialkyl acid crystallization mother liquor |
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| CN107777815B (en) * | 2016-08-25 | 2021-02-23 | 中煤鄂尔多斯能源化工有限公司 | Treatment system and treatment process for strong brine in coal chemical industry |
| CN107311374A (en) * | 2017-05-30 | 2017-11-03 | 毛强平 | The Zero-discharge treating process and device of a kind of coal chemical industrial waste water |
| CN107311374B (en) * | 2017-05-30 | 2020-02-07 | 苏州新能环境技术股份有限公司 | Zero-emission treatment process and device for coal chemical industry wastewater |
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| CN107902832B (en) * | 2017-12-15 | 2023-12-19 | 安徽普朗膜技术有限公司 | Sodium sulfate crystallization mother liquor treatment system |
| CN110902923A (en) * | 2019-12-04 | 2020-03-24 | 安徽普朗膜技术有限公司 | Treatment and recovery system for high-salinity wastewater in coal chemical industry |
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| CN205387520U (en) | 2016-07-20 |
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