CN104478173B - Coal chemical industry enterprises wastewater treatment and resource integrated treatment process - Google Patents
Coal chemical industry enterprises wastewater treatment and resource integrated treatment process Download PDFInfo
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- CN104478173B CN104478173B CN201410796750.4A CN201410796750A CN104478173B CN 104478173 B CN104478173 B CN 104478173B CN 201410796750 A CN201410796750 A CN 201410796750A CN 104478173 B CN104478173 B CN 104478173B
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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
- C02F11/00—Treatment of sludge; Devices therefor
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
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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
- C02F3/00—Biological 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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/005—Combined electrochemical biological processes
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
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Abstract
The present invention relates to a kind of coal chemical industry enterprises wastewater treatment and resource integrated treatment process, particularly coal chemical industrial waste water is processed reuse and " zero-emission " technique, and described integrated treatment process comprises following steps:<b/>One, the Treatment of Sludge and six that pretreatment system technique, two, biochemical treatment system technique, three, advanced treatment system technique, four, deodorization process, five, coal chemical industry enterprises wastewater treatment produce, the accessory substance processing that coal chemical industry enterprises wastewater treatment produces. The present invention is mainly used in the system processing of coal chemical industry enterprises waste water.
Description
Technical field
The present invention relates to a kind of coal chemical industry enterprises wastewater treatment and resource integrated treatment process, particularly coal chemical industrial waste water processingReuse and " zero-emission " technique.
Background technology
Coal Chemical Industry refers to taking coal as raw material, makes coal be converted into gas, liquid and solid fuel and chemicals through chemical processProcess. Mainly comprise coal gasification, liquefaction, destructive distillation, and tar processing and carbide acetylene chemical industry etc. Main in coal chemical industry sewageContain: tens kinds of pollutions such as oils, COD, phenols, sulfide, ammonia nitrogen, phenol, cyanogen, benzene, pyridine, indoles and quinolineThing, complicated component, pollutant levels are high, colourity is high, toxicity is large, and character is highly stable, is that a kind of typical difficult degradation is organicWaste water. For such wastewater treatment, treatment process can be divided into pretreatment, coagulation, two stage treatment and advanced treating conventionally.Coagulation refers to materialization processing, and two stage treatment is mainly biochemical treatment, and the method that advanced treating is generally applied is ozonization method, workProperty carbon adsorption, multi-medium filtering, ultrafiltration and counter-infiltration etc.
Summary of the invention
The object of the invention is to: by the combination of multiple treatment process, propose a kind of coal chemical industry enterprises wastewater treatment andResource technology, particularly coal chemical industry enterprises wastewater treatment and renovation and " zero-emission " technique. Whole treatment system is outwards discharge notSewage, fully recovering is in Coal Chemical Industry process water, recirculated cooling water supplementing water etc. In processing procedure can produce a certain amount of crude phenols,The crystal salt that oil, ammonia, soda acid, scum silica frost, sediment, excess sludge and evaporative crystallization produce. Crude phenols, oil, ammonia, soda acid enterRow is collected and is taken out; Slag, excess sludge, greasy filth first carry out thickening processing, mud cake can with coal-fired mixed combustion place of power plant for self-supplyManaging or be transported to waste treatment plant processes; Crystal salt is transported to treatment plant or landfill storage processing on the spot.
The object of the invention is such realization: coal chemical industry enterprises wastewater treatment and resource integrated treatment process, described collectionBecome treatment process to comprise following steps: one, pretreatment system technique
(1) coal chemical engineering equipment phenol ammonia waste water processing: wherein, in a phenol ammonia waste water, the oil removing cell process of phenol ammonia recovery system is, coalificationFrock is put phenol ammonia waste water and is entered tank in waste water waste-oil scavenger tank, and in tank, tank water outlet enters oil partiting precipitation pool, and oil partiting precipitation pool water outlet is enteredEnter inert gas flotation tank, the water outlet of inert gas flotation tank enters high accuracy oil water separator and completes waste water oil removal treatment, high accuracyOil water separator water outlet enters intermediate storage tank; The sump oil that b oil partiting precipitation pool and inert gas flotation tank produce enters sump tank, soRear outward transport, reuse or burning disposal; The greasy filth that in c tank, tank, oil partiting precipitation pool and inert gas flotation tank produce enters greasy filth pond,The greasy filth in greasy filth pond enters sludge concentration tank and processes; When d coal chemical engineering equipment phenol ammonia waste water exceeds design discharge, unnecessary is uselessWater enters accident pool, accident pool water outlet, and according to oil content >=200mg/L, waste water enters tank in tank; Oil content < 200mg/L,Waste water enters homogeneous and all measures regulating reservoir 1; (2) phenol ammonia recovery system: the treatment process of a phenol wastewater is that intermediate storage tank water outlet is enteredEnter depickling deamination apparatus, the water outlet of depickling deamination apparatus enters extraction tower, and extraction tower water outlet enters solvent gas stripper, solvent gas stripperWater outlet enters homogeneous and all measures regulating reservoir 2; The recovery of b ammonia, depickling deamination apparatus enters ammonia through the process of stripping and ammonia still process and purifiesDevice, the ammonia that ammonia decontamination device produces liquefies; The sour gas that c depickling deamination apparatus produces enters combustion furnace placeReason; The phenol of d extraction tower and the extraction of solvent gas stripper enters solvent recovery tower, and solvent recovery tower recovered solvent enters extraction tower,Product crude phenols, oil are collected; Resultant product enters solvent refining tower, and solvent refining tower recovered solvent enters extraction tower, itsIts remaining oil and impurity thereof enter combustion furnace; Crude phenols and oil that e solvent recovery tower produces are taken out; (3) coal chemical engineering equipmentThe gasification waste water processing producing: wherein, the gasification waste water that a coal chemical engineering equipment produces enters homogeneous and all measures regulating reservoir 1, and homogeneous is all measuredRegulating reservoir 1 water outlet enters oil partiting precipitation pool, and oil partiting precipitation pool water outlet enters two-stage series connection air-dissolving air-float pond, the molten gas gas of two-stage series connectionFloating pond water outlet enters homogeneous and all measures regulating reservoir 2; When the gasification waste water that b coal chemical engineering equipment produces exceeds design discharge, unnecessary waste waterEnter accident pool; The sump oil that c oil partiting precipitation pool and two-stage series connection air-dissolving air-float pond produce enters sump tank, then outward transport, reuseOr burn; The mud that d oil partiting precipitation pool and two-stage series connection air-dissolving air-float pond produce enters greasy filth pond, then enters sludge concentration tankProcess; (4) oily waste water, sour gas remove draining, rainwater processing: wherein, a oily waste water, sour gas remove rowWater or rainwater enter homogeneous and all measure regulating reservoir 1; When b oily waste water, sour gas remove draining or rainwater and exceed design discharge, enterAccident pool; C oily waste water, sour gas remove draining or rainwater oil content >=200mg/L, and waste water enters accident pool, then entersTank in tank; D oily waste water, sour gas remove draining or rainwater oil content < 200mg/L, and waste water enters homogeneous and all measures regulating reservoir 1;
Two, biochemical treatment system technique
According to step 1 waste water quality situation after treatment, select following biochemical processing process: (1) works as coal chemical industrial waste water, ammonia nitrogen 300～500mg/L, cyanide >=50mg/L, when coal chemical technology adopts " Texaco " or " shell " technique, adopt route A:Wherein, a homogeneous is all measured regulating reservoir 2 water outlets and is entered high-efficient biological reactor, and high-efficient biological reactor water outlet enters fluidized bed bioMembrane reactor (MBBR), MBBR water outlet enters intermediate pool; The mud that b high-efficient biological reactor and MBBR produce entersEntering sludge concentration tank processes; (2) work as coal chemical industrial waste water, COD (COD) >=5000mg/L, ammonia nitrogen >=500mg/L,Phenol >=1500mg/L, oils >=200mg/L, when coal chemical technology adopts " lurgi gasifier " technique, adopt route B: wherein, and aHomogeneous is all measured regulating reservoir 2 water outlets and is entered one section, triple effect efficient biochemical pond, and it is efficiently raw that the water outlet of one section, triple effect efficient biochemical pond enters triple effectChange Chi Erduan, the water outlet of two sections, triple effect efficient biochemical pond enters three sections, triple effect efficient biochemical pond, and the water outlet of three sections, triple effect efficient biochemical pond is enteredEnter four sections, triple effect efficient biochemical pond, the water outlet of four sections, triple effect efficient biochemical pond enters second pond, and second pond water outlet enters the suspension degree of depthTreatment process high dense settling pond, high dense settling pond water outlet enters ozone contact reaction pond, and the water outlet of ozone contact reaction pond entersBiological activated carbon filter, biological activated carbon filter water outlet enters Airfloat filtering pond, and Airfloat filtering pond water outlet enters intermediate pool; B plant areaLiving area, base sanitary sewage enters two sections, triple effect efficient biochemical pond; Two sections, c triple effect efficient biochemical pond and triple effect efficient biochemical pond threeSection connects Aeration fan; The mud that d second pond produces enters sludge concentration tank, and the mud of sludge concentration tank enters centrifuge dewatering,Mud cake enters boiler room and burns or be transported to waste treatment plant's processing outward; The supernatant that e sludge concentration tank produces and centrifuge produceFiltrate enters homogeneous and all measures regulating reservoir 2; F high dense settling pond produces 20～30% of water, enters backwash pond, and 70～80% produce waterEnter ozone contact reaction pond, the mud of generation enters sludge concentration tank; G ozone contact reaction pond connects ozone and occurs and addEquipment; H biological activated carbon filter connects backwash pond, Aeration fan, backwash air blast; I backwash pond is through backwash air blastMachine carries out backwash to biological activated carbon filter, and the backwash water of generation enters high dense settling pond; Water in the middle of the water outlet of j Airfloat filtering pond entersPond, scum silica frost enters sludge concentration tank and processes; Described triple effect efficient biochemical section is the integrated technique of wastewater biochemical processing, itsIn, one section is hydrolysis acidification pool, and two sections is fluidized bed bio membrane reactor (MBBR), and three sections is anoxic pond, and four sections is aerobicPond; One section and two sections in described triple effect efficient biochemical section adds biologic packing material;
Three, advanced treatment system technique
(1) the brine waste treatment process of total dissolved solid (TDS) < 3000mg/L: wherein, it is useless that a brine waste enters saliferousWater regulating reservoir, the water outlet of brine waste regulating reservoir enters high dense settling pond, and high dense settling pond water outlet enters turbidity of wastewater and reduces workSkill more medium filter, more medium filter water outlet enters intermediate pool, and intermediate pool water outlet enters ultrafiltration apparatus, ultrafiltration apparatusProduce water and enter reverse osmosis equipment, reverse osmosis equipment produces water and enters reuse pool 1, and in reuse pool 1,20～30% water is back to coalChemical process water, 70～80% water enters reuse pool 2; The backwash water of b ultrafiltration apparatus enters high dense settling pond; (2)The processing of high-salt wastewater: wherein, the strong brine that a reverse osmosis equipment produces enters Na-ion exchanger, Na-ion exchanger water outletProcess route according to reclaiming product different choice: in the time that needs reclaim crystal salt, adopt route A: Na-ion exchanger water outlet is enteredEnter negative and positive EDBM equipment, the fresh water that negative and positive EDBM equipment produces enters reuse pool 2; Negative and positive EDBM equipment producesRaw dense water enters mechanical steam recompression (MVR) evaporimeter; The condensed water that MVR evaporimeter produces enters reuse pool 2;The crystal salt that MVR evaporimeter produces, transports outward landfill or stores on the spot reuse in the future; When soda acid need to be reclaimed, adopt routeB: Na-ion exchanger water outlet enters high pressure reverse osmosis equipment, the fresh water that high pressure reverse osmosis equipment produces enters reuse pool 2, heightThe dense water of pressing reverse osmosis equipment to produce enters bipolar membrane electrodialysis equipment, and bipolar membrane electrodialysis equipment produces water and enters intermediate pool, twoSoda acid reuse or take-away that utmost point EDBM equipment produces; The regenerated liquid that described Na-ion exchanger produces enters the softening pond of lime,The product water in the softening pond of lime enters high dense settling pond, and the waste residue that the softening pond of lime produces enters sludge concentration tank; Described negative and positiveThe dense water that EDBM equipment and high pressure reverse osmosis equipment produce, according to reclaiming product crystal salt or soda acid, can switch technique mutually;Four, deodorization process: two sections of high-efficient biological reactors, MBBR, one section, triple effect efficient biochemical pond, triple effect efficient biochemical pond, threeThe waste gas that three sections, efficient biochemical pond of effect, four sections, triple effect efficient biochemical pond, second pond, sludge concentration tank produce is collected through gas skirtWaste gas, enters high-performance bio reaction deodorizing unit by gas sampling pipe and air-introduced machine, and high-performance bio reaction deodorizing unit producesInnocuous gas, through exhaust chimney discharge; Described air-introduced machine is connected with water circulating pump by automatic control system; DescribedHigh-performance bio reaction deodorizing unit is connected with water circulating pump is two-way; Described water circulating pump is connected with cyclic water tank is two-way; DescribedHigh-performance bio reaction deodorizing unit comprises washing humidifying section, biological deodorizing section and strengthening segment;
Five, the Treatment of Sludge that coal chemical industry enterprises wastewater treatment produces: the mud of sludge concentration tank is through centrifuge dewatering, the mud cake of generationCan burn or be transported to waste treatment plant's processing outward in boiler of feeding room; The filtrate that sludge concentration tank produces enters homogeneous and all measures regulating reservoir 2;
Six, the accessory substance processing that coal chemical industry enterprises wastewater treatment produces: oil partiting precipitation pool, inert gas flotation tank, solvent recovery tower,The oil producing, collects and takes out; The ammonia that ammonia purifier produces, collects and takes out; The crude phenols that solvent recovery tower produces, outside collectionSell; The soda acid that bipolar membrane electrodialysis equipment produces, collects reuse or take-away; Biologic packing material or material used in above-mentioned are citySell product, described technique and various device are existing equipment well known in the art.
Beneficial effect of the present invention: the 1. good mass-transfer between gas, water, solid three-phase can be realized in triple effect efficient biochemical pond, increasesBiomembranous activity on strong filler, organic loading and the biochemical treatment efficiency of raising system. 2. can realize waste water accessory substance, thickProfit is created in recovery, the take-away of phenol, oil, ammonia, soda acid; Crystal salt landfill stores, and can realize the preservation of resource. 3. whole systemThe fresh water fully recovering that system produces is in production technology water, recirculated cooling water supplementing water; The waste residue producing and mud are de-through mudThe mud cake producing after water, can enter boiler room and burn or be transported to waste treatment plant's processing outward. 4. the waste gas that whole system produces is through removingAfter smelly PROCESS FOR TREATMENT, the innocuous gas of generation carries out outer row.
Brief description of the drawings
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Fig. 1 is pretreatment system process chart of the present invention; Fig. 2 is phenol ammonia recovery system process chart of the present invention;
Fig. 3 is biochemical treatment system process chart of the present invention; Fig. 4 is advanced treatment system process chart of the present invention; Fig. 5For deodorization process flow chart of the present invention.
Detailed description of the invention
Embodiment 1, coal chemical industry enterprises wastewater treatment and resource integrated treatment process, as shown in Fig. 1,2,3,4 and 5, describedIntegrated treatment process comprises following steps:
One, pretreatment system technique (1) coal chemical engineering equipment phenol ammonia waste water processing: wherein, in a phenol ammonia waste water, phenol ammonia recovery system removesOil cell process be, coal chemical engineering equipment phenol ammonia waste water enters tank in waste water waste-oil scavenger tank, in tank, tank water outlet enters oil partiting precipitation pool,Oil partiting precipitation pool water outlet enters inert gas flotation tank, and the water outlet of inert gas flotation tank enters high accuracy oil water separator and completes waste waterOil removal treatment, the water outlet of high accuracy oil water separator enters intermediate storage tank; The dirt that b oil partiting precipitation pool and inert gas flotation tank produceOil enters sump tank, then outward transport, reuse or burning disposal; In c tank, tank, oil partiting precipitation pool and inert gas flotation tank produceGreasy filth enter greasy filth pond, the greasy filth in greasy filth pond enters sludge concentration tank and processes; D coal chemical engineering equipment phenol ammonia waste water exceeds to be establishedWhen meter flow, unnecessary waste water enters accident pool, accident pool water outlet, and according to oil content >=200mg/L, waste water enters tank in tank;Oil content < 200mg/L, waste water enters homogeneous and all measures regulating reservoir 1; (2) phenol ammonia recovery system: the treatment process of a phenol wastewaterFor, intermediate storage tank water outlet enters depickling deamination apparatus, and the water outlet of depickling deamination apparatus enters extraction tower, and extraction tower water outlet enters solventStripping tower, the water outlet of solvent gas stripper enters homogeneous and all measures regulating reservoir 2; The recovery of b ammonia, depickling deamination apparatus is through stripping and steamingThe process of ammonia enters ammonia purifier, and the ammonia that ammonia decontamination device produces liquefies; The acidity that c depickling deamination apparatus producesGas enters combustion furnace processing; The phenol of d extraction tower and the extraction of solvent gas stripper enters solvent recovery tower, and solvent recovery tower reclaimsSolvent enter extraction tower, product crude phenols, oil are collected; Resultant product enters solvent refining tower, and solvent refining tower reclaimsSolvent enters extraction tower, and other remaining oil and impurity thereof enter combustion furnace; Outside the crude phenols that e solvent recovery tower produces and oil carry outSell; (3) the gasification waste water processing that coal chemical engineering equipment produces: wherein, it is equal that the gasification waste water that a coal chemical engineering equipment produces enters homogeneousAmount regulating reservoir 1, homogeneous is all measured regulating reservoir 1 water outlet and is entered oil partiting precipitation pool, and oil partiting precipitation pool water outlet enters the molten gas gas of two-stage series connectionFloating pond, the pond water outlet of two-stage series connection air-dissolving air-float enters homogeneous and all measures regulating reservoir 2; The gasification waste water that b coal chemical engineering equipment produces exceeds to be establishedWhen meter flow, unnecessary waste water enters accident pool; The sump oil that c oil partiting precipitation pool and two-stage series connection air-dissolving air-float pond produce enters uselessOil tank, then outward transport, reuse or burning; The mud that d oil partiting precipitation pool and two-stage series connection air-dissolving air-float pond produce enters greasy filth pond,Then entering sludge concentration tank processes; (4) oily waste water, sour gas remove draining, rainwater processing: wherein, and a oil-containingWaste water, sour gas remove draining or rainwater and enter homogeneous and all measure regulating reservoir 1; B oily waste water, sour gas remove draining or rainwater is superWhile going out design discharge, enter accident pool; C oily waste water, sour gas remove draining or rainwater oil content >=200mg/L, and waste water entersEnter accident pool, then enter tank in tank; D oily waste water, sour gas remove draining or rainwater oil content < 200mg/L, and waste water entersEnter homogeneous and all measure regulating reservoir 1;
Two, biochemical treatment system technique, according to step 1 waste water quality situation after treatment, is selected following biochemical processing process: (1) whenCoal chemical industrial waste water, ammonia nitrogen 300～500mg/L, cyanide >=50mg/L, coal chemical technology adopts " Texaco " or " shell "When technique, adopt route A: wherein, a homogeneous is all measured regulating reservoir 2 water outlets and entered high-efficient biological reactor, high-performance bio reactionDevice water outlet enters fluidized bed bio membrane reactor (MBBR), and MBBR water outlet enters intermediate pool; B high-efficient biological reactor andThe mud that MBBR produces enters sludge concentration tank and processes; (2) work as coal chemical industrial waste water, COD (COD) >=5000mg/L, ammonia nitrogen >=500mg/L, phenol >=1500mg/L, oils >=200mg/L, coal chemical technology adopts " lurgi gasifier "When technique, adopt route B: wherein, a homogeneous is all measured regulating reservoir 2 water outlets and entered one section, triple effect efficient biochemical pond, triple effect is efficiently rawChange the water outlet of one section, pond and enter two sections, triple effect efficient biochemical pond, the water outlet of two sections, triple effect efficient biochemical pond enters three sections, triple effect efficient biochemical pond,The water outlet of three sections, triple effect efficient biochemical pond enters four sections, triple effect efficient biochemical pond, and the water outlet of four sections, triple effect efficient biochemical pond enters second pond,Second pond water outlet enters suspension advanced treatment process high dense settling pond, and high dense settling pond water outlet enters ozone contact reaction pond,The water outlet of ozone contact reaction pond enters biological activated carbon filter, and biological activated carbon filter water outlet enters Airfloat filtering pond, and Airfloat filtering pond goes outWater enters intermediate pool; Living area, b plant area base sanitary sewage enters two sections, triple effect efficient biochemical pond; C triple effect efficient biochemical pond twoSection is connected Aeration fan with three sections, triple effect efficient biochemical pond; The mud that d second pond produces enters sludge concentration tank, sludge concentration tankMud enter centrifuge dewatering, mud cake enter boiler room burn or be transported to outward waste treatment plant process; E sludge concentration tank producesSupernatant and the filtrate that produces of centrifuge enter homogeneous and all measure regulating reservoir 2; F high dense settling pond produces 20～30% of water, entersBackwash pond, 70～80% produce water enters ozone contact reaction pond, and the mud of generation enters sludge concentration tank; G ozone contact is anti-Answering pond to connect ozone occurs and adding equipment; H biological activated carbon filter connects backwash pond, Aeration fan, backwash air blast;I backwash pond is carried out backwash through backwash air blast to biological activated carbon filter, and the backwash water of generation enters high dense settling pond; jAirfloat filtering pond water outlet enters intermediate pool, and scum silica frost enters sludge concentration tank and processes; Described triple effect efficient biochemical section is waste waterThe integrated technique of biochemical treatment, wherein, one section is hydrolysis acidification pool, two sections is fluidized bed bio membrane reactor (MBBR), threeSection is anoxic pond, and four sections is Aerobic Pond; One section and two sections in described triple effect efficient biochemical section adds biologic packing material;
Three, the brine waste treatment process of advanced treatment system technique (1) total dissolved solid (TDS) < 3000mg/L: wherein,A brine waste enters brine waste regulating reservoir, and the water outlet of brine waste regulating reservoir enters high dense settling pond, and high dense settling pond goes outWater enters turbidity of wastewater and reduces technique more medium filter, and more medium filter water outlet enters intermediate pool, and intermediate pool water outlet is enteredEnter ultrafiltration apparatus, ultrafiltration apparatus produces water and enters reverse osmosis equipment, and reverse osmosis equipment produces water and enters reuse pool 1, reuse pool 1In 20～30% water be back to Coal Chemical Industry process water, 70～80% water enters reuse pool 2; The backwash water of b ultrafiltration apparatus is enteredEnter high dense settling pond; (2) processing of high-salt wastewater: wherein, the strong brine that a reverse osmosis equipment produces enters sodium ion exchangeDevice, Na-ion exchanger water outlet is processed route according to reclaiming product different choice: in the time that needs reclaim crystal salt, adopt route A:Na-ion exchanger water outlet enters negative and positive EDBM equipment, and the fresh water that negative and positive EDBM equipment produces enters reuse pool 2;The dense water that negative and positive EDBM equipment produces enters mechanical steam recompression (MVR) evaporimeter; MVR evaporimeter producesCondensed water enters reuse pool 2; The crystal salt that MVR evaporimeter produces, transports outward landfill or stores on the spot reuse in the future; NeedWhile reclaiming soda acid, adopt route B: Na-ion exchanger water outlet enters high pressure reverse osmosis equipment, high pressure reverse osmosis equipment producesFresh water enter reuse pool 2, high pressure reverse osmosis equipment produce dense water enter bipolar membrane electrodialysis equipment, bipolar membrane electrodialysisEquipment produces water and enters intermediate pool, soda acid reuse or take-away that bipolar membrane electrodialysis equipment produces; Described Na-ion exchanger producesRaw regenerated liquid enters the softening pond of lime, and the product water in the softening pond of lime enters high dense settling pond, the waste residue that the softening pond of lime producesEnter sludge concentration tank; The dense water that described negative and positive EDBM equipment and high pressure reverse osmosis equipment produce is according to reclaiming product crystallizationSalt or soda acid, can switch technique mutually;
Four, deodorization process: two sections of high-efficient biological reactors, MBBR, one section, triple effect efficient biochemical pond, triple effect efficient biochemical pond, threeThe waste gas that three sections, efficient biochemical pond of effect, four sections, triple effect efficient biochemical pond, second pond, sludge concentration tank produce is collected through gas skirtWaste gas, enters high-performance bio reaction deodorizing unit by gas sampling pipe and air-introduced machine, and high-performance bio reaction deodorizing unit producesInnocuous gas, through exhaust chimney discharge; Described air-introduced machine is connected with water circulating pump by automatic control system; DescribedHigh-performance bio reaction deodorizing unit is connected with water circulating pump is two-way; Described water circulating pump is connected with cyclic water tank is two-way; DescribedHigh-performance bio reaction deodorizing unit comprises washing humidifying section, biological deodorizing section and strengthening segment;
Five, the Treatment of Sludge that coal chemical industry enterprises wastewater treatment produces: the mud of sludge concentration tank is through centrifuge dewatering, the mud cake of generationCan burn or be transported to waste treatment plant's processing outward in boiler of feeding room; The filtrate that sludge concentration tank produces enters homogeneous and all measures regulating reservoir 2;Six, the accessory substance processing that coal chemical industry enterprises wastewater treatment produces: oil partiting precipitation pool, inert gas flotation tank, solvent recovery tower,The oil producing, collects and takes out; The ammonia that ammonia purifier produces, collects and takes out; The crude phenols that solvent recovery tower produces, outside collectionSell; The soda acid that bipolar membrane electrodialysis equipment produces, collects reuse or take-away; Biologic packing material or material used in above-mentioned are citySell product, described technique and various device are existing equipment well known in the art.
Practical proof: certain coal chemical industry enterprises is produced 1200000 tons of methyl alcohol, 800,000 tons of dimethyl ether engineering project Waste Water Treatments per year.
Water analysis
| Sequence number | Index | Numerical value | Unit |
| 1 | Oil >= | 500 | mg/L |
| 2 | Volatile phenol >= | 200 | mg/L |
| 3 | Polyhydric phenols >= | 600 | mg/L |
| 4 | Free ammonia >= | 50 | mg/L |
| 5 | Fixed ammonia >= | 200 | mg/L |
| 6 | COD (COD) >= | 5000 | mg/L |
The selection of technique is as follows:
(1) pretreating process
Crushed coal pressure gasifying device phenol ammonia waste water recovery process adopts " tank+oil partiting precipitation pool in tank+inert gas flotation tank+high accuracy oilSeparator+phenol ammonia recovery unit " remove crude phenols, oil, ammonia in waste water, and reclaim;
Because gasifying powder coal device gasification waste water and oily waste water, sour gas remove oil content < 200mg/L in draining, wastewater treatment workSkill adopts " homogeneous is all measured regulating reservoir 1+ oil partiting precipitation pool+two-stage series connection air-dissolving air-float pond " to remove suspension and the oils in waste waterMaterial, and recovered oil.
(2) biochemical processing process
Due to crushed coal pressure gasifying device phenol ammonia waste water COD (COD) >=5000mg/L, oils > 200mg/L, therefore adopt" homogeneous is all measured regulating reservoir 2+ triple effect efficient biochemical pond+second pond+high dense settling pond+ozone contact reaction pond+biological activated carbonFilter tank+Airfloat filtering pond+intermediate pool " comprehensive wastewater is carried out to biochemical treatment. High dense settling pond produces 20% of water and enters recoilWashing basin, 80% produces water enters ozone contact reaction pond.
(3) advanced treatment process
The product water of biochemical processing process, adopts " ultrafiltration apparatus+reverse osmosis equipment+Na-ion exchanger+negative and positive EDBM equipment+ MVR evaporimeter " treatment process, the fresh water that wherein reverse osmosis equipment produces enters reuse pool 1, and 30% product water returnsFor Coal Chemical Industry process water. The water yield of reuse pool 1,70% enters reuse pool 2; The dense water that reverse osmosis equipment produces entersNa-ion exchanger; The product water of Na-ion exchanger enters negative and positive EDBM equipment, the fresh water that negative and positive EDBM equipment producesThe condensate liquid producing with MVR evaporimeter enters reuse pool 2, is back to recirculated cooling water supplementing water. Na-ion exchanger againRaw liquid enters the softening pond of lime; The product water in the softening pond of lime enters high dense settling pond, and the waste residue that the softening pond of lime produces enters dirtMud thickener. The crystal salt that MVR evaporimeter produces, adopts waterproof measure landfill on the spot, and landfill depth is 1.5 meters, with soil timeFill out, planting technique is carried out on ground.
(4) sludge treatment technique
Tank, oil partiting precipitation pool, two-stage series connection air-dissolving air-float pond, inert gas flotation tank, second pond, high dense settling pond, gas in tankThe mud that the softening pond of floating filter, lime produces enters sludge concentration tank, carries out sludge dewatering, the mud cake of generation with centrifugal dehydratorBeing transported to waste treatment plant outward processes.
(5) the accessory substance treatment process that wastewater treatment produces
The oil that oil partiting precipitation pool, inert gas flotation tank, two-stage series connection air-dissolving air-float pond, solvent recovery tower produce, collects and takes out; AmmoniaThe ammonia that purifier produces, collects and takes out; The crude phenols that solvent recovery tower produces, collect and take out; Bipolar membrane electrodialysis equipment producesRaw soda acid, collects and takes out.
(6) waste gas treatment process
One section, triple effect efficient biochemical pond, two sections, triple effect efficient biochemical pond, three sections, triple effect efficient biochemical pond, four sections, triple effect efficient biochemical pond,The waste gas that second pond, sludge concentration tank produce is after deodorization process, and the innocuous gas of generation carries out outer row.
Reuse pool 1 and 2, it is (total that effluent quality reaches " the recirculated cooling water Standard of reclaimed water " of HG/T3923Molten solid, by≤300mg/L), concrete data are as follows:
| Sequence number index | Unit | Numerical value |
| 1CODCr | mg/L | 60 |
| 2 ammoniacal nitrogens | mg/L | 12 |
| 3 oil contents | mg/l | 0.3 |
Claims (1)
1. coal chemical industry enterprises wastewater treatment and resource integrated treatment process, is characterized in that: described integrated treatment process comprises following steps:
One, pretreatment system technique
(1) coal chemical engineering equipment phenol ammonia waste water processing: wherein, in a phenol ammonia waste water, the oil removing cell process of phenol ammonia recovery system is, coal chemical engineering equipment phenol ammonia waste water enters tank in waste water waste-oil scavenger tank, in tank, tank water outlet enters oil partiting precipitation pool, oil partiting precipitation pool water outlet enters inert gas flotation tank, the water outlet of inert gas flotation tank enters high accuracy oil water separator and completes waste water oil removal treatment, and the water outlet of high accuracy oil water separator enters intermediate storage tank; The sump oil that b oil partiting precipitation pool and inert gas flotation tank produce enters sump tank, then outward transport, reuse or burning disposal; The greasy filth that in c tank, tank, oil partiting precipitation pool and inert gas flotation tank produce enters greasy filth pond, and the greasy filth in greasy filth pond enters sludge concentration tank and processes; When d coal chemical engineering equipment phenol ammonia waste water exceeds design discharge, unnecessary waste water enters accident pool, accident pool water outlet, and according to oil content >=200mg/L, waste water enters tank in tank; Oil content < 200mg/L, waste water enters homogeneous and all measures regulating reservoir 1; (2) phenol ammonia recovery system: the treatment process of a phenol wastewater is, intermediate storage tank water outlet enters depickling deamination apparatus, and the water outlet of depickling deamination apparatus enters extraction tower, and extraction tower water outlet enters solvent gas stripper, and the water outlet of solvent gas stripper enters homogeneous and all measures regulating reservoir 2; The recovery of b ammonia, depickling deamination apparatus enters ammonia purifier through the process of stripping and ammonia still process, and the ammonia that ammonia decontamination device produces liquefies; The sour gas that c depickling deamination apparatus produces enters combustion furnace processing; The phenol of d extraction tower and the extraction of solvent gas stripper enters solvent recovery tower, and solvent recovery tower recovered solvent enters extraction tower, and product crude phenols, oil are collected; Resultant product enters solvent refining tower, and solvent refining tower recovered solvent enters extraction tower, and other remaining oil and impurity thereof enter combustion furnace; Crude phenols and oil that e solvent recovery tower produces are taken out; (3) the gasification waste water processing that coal chemical engineering equipment produces: wherein, the gasification waste water that a coal chemical engineering equipment produces enters homogeneous and all measures regulating reservoir 1, homogeneous is all measured regulating reservoir 1 water outlet and is entered oil partiting precipitation pool, oil partiting precipitation pool water outlet enters two-stage series connection air-dissolving air-float pond, and the pond water outlet of two-stage series connection air-dissolving air-float enters homogeneous and all measures regulating reservoir 2; When the gasification waste water that b coal chemical engineering equipment produces exceeds design discharge, unnecessary waste water enters accident pool; The sump oil that c oil partiting precipitation pool and two-stage series connection air-dissolving air-float pond produce enters sump tank, then outward transport, reuse or burning; The mud that d oil partiting precipitation pool and two-stage series connection air-dissolving air-float pond produce enters greasy filth pond, then enters sludge concentration tank and processes; (4) oily waste water, sour gas remove draining, rainwater processing: wherein, a oily waste water, sour gas remove draining or rainwater and enter homogeneous and all measure regulating reservoir 1; When b oily waste water, sour gas remove draining or rainwater and exceed design discharge, enter accident pool; C oily waste water, sour gas remove draining or rainwater oil content >=200mg/L, and waste water enters accident pool, then enter tank in tank; D oily waste water, sour gas remove draining or rainwater oil content < 200mg/L, and waste water enters homogeneous and all measures regulating reservoir 1;
Two, biochemical treatment system technique
According to step 1 waste water quality situation after treatment, select following biochemical processing process: (1) works as coal chemical industrial waste water, ammonia nitrogen 300～500mg/L, cyanide >=50mg/L, when coal chemical technology adopts " Texaco " or " shell " technique, adopt route A: wherein, a homogeneous is all measured regulating reservoir 2 water outlets and is entered high-efficient biological reactor, and high-efficient biological reactor water outlet enters fluidized bed bio membrane reactor (MBBR), and MBBR water outlet enters intermediate pool, the mud that b high-efficient biological reactor and MBBR produce enters sludge concentration tank and processes, (2) work as coal chemical industrial waste water, COD (COD) >=5000mg/L, ammonia nitrogen >=500mg/L, phenol >=1500mg/L, oils >=200mg/L, when coal chemical technology adopts " lurgi gasifier " technique, adopt route B: wherein, a homogeneous is all measured regulating reservoir 2 water outlets and is entered one section, triple effect efficient biochemical pond, the water outlet of one section, triple effect efficient biochemical pond enters two sections, triple effect efficient biochemical pond, the water outlet of two sections, triple effect efficient biochemical pond enters three sections, triple effect efficient biochemical pond, the water outlet of three sections, triple effect efficient biochemical pond enters four sections, triple effect efficient biochemical pond, the water outlet of four sections, triple effect efficient biochemical pond enters second pond, second pond water outlet enters suspension advanced treatment process high dense settling pond, high dense settling pond water outlet enters ozone contact reaction pond, the water outlet of ozone contact reaction pond enters biological activated carbon filter, biological activated carbon filter water outlet enters Airfloat filtering pond, Airfloat filtering pond water outlet enters intermediate pool, living area, b plant area base sanitary sewage enters two sections, triple effect efficient biochemical pond, two sections, c triple effect efficient biochemical pond is connected Aeration fan with three sections, triple effect efficient biochemical pond, the mud that d second pond produces enters sludge concentration tank, and the mud of sludge concentration tank enters centrifuge dewatering, and mud cake enters boiler room and burns or be transported to waste treatment plant's processing outward, the filtrate that the supernatant that e sludge concentration tank produces and centrifuge produce enters homogeneous and all measures regulating reservoir 2, f high dense settling pond produces 20 ~ 30% of water, enters backwash pond, and 70 ~ 80% produce water enters ozone contact reaction pond, and the mud of generation enters sludge concentration tank, g ozone contact reaction pond connects ozone and occurs and adding equipment, h biological activated carbon filter connects backwash pond, Aeration fan, backwash air blast, i backwash pond is carried out backwash through backwash air blast to biological activated carbon filter, and the backwash water of generation enters high dense settling pond, the water outlet of j Airfloat filtering pond enters intermediate pool, and scum silica frost enters sludge concentration tank and processes, described triple effect efficient biochemical section is the integrated technique of wastewater biochemical processing, and wherein, one section is hydrolysis acidification pool, and two sections is fluidized bed bio membrane reactor (MBBR), and three sections is anoxic pond, and four sections is Aerobic Pond, one section and two sections in described triple effect efficient biochemical section adds biologic packing material,
Three, advanced treatment system technique
(1) the brine waste treatment process of total dissolved solid (TDS) < 3000mg/L: wherein, a brine waste enters brine waste regulating reservoir, the water outlet of brine waste regulating reservoir enters high dense settling pond, high dense settling pond water outlet enters turbidity of wastewater and reduces technique more medium filter, more medium filter water outlet enters intermediate pool, intermediate pool water outlet enters ultrafiltration apparatus, ultrafiltration apparatus produces water and enters reverse osmosis equipment, reverse osmosis equipment produces water and enters reuse pool 1, in reuse pool 1,20 ~ 30% water is back to Coal Chemical Industry process water, 70 ~ 80% water enters reuse pool 2, the backwash water of b ultrafiltration apparatus enters high dense settling pond, (2) processing of high-salt wastewater: wherein, the strong brine that a reverse osmosis equipment produces enters Na-ion exchanger, Na-ion exchanger water outlet is processed route according to reclaiming product different choice: in the time that needs reclaim crystal salt, adopt route A: Na-ion exchanger water outlet enters negative and positive EDBM equipment, the fresh water that negative and positive EDBM equipment produces enters reuse pool 2, the dense water that negative and positive EDBM equipment produces enters mechanical steam recompression (MVR) evaporimeter, the condensed water that MVR evaporimeter produces enters reuse pool 2, the crystal salt that MVR evaporimeter produces, transports outward landfill or stores on the spot reuse in the future, need to reclaim soda acid time, adopt route B: Na-ion exchanger water outlet enters high pressure reverse osmosis equipment, the fresh water that high pressure reverse osmosis equipment produces enters reuse pool 2, the dense water that high pressure reverse osmosis equipment produces enters bipolar membrane electrodialysis equipment, bipolar membrane electrodialysis equipment produces water and enters intermediate pool, soda acid reuse or take-away that bipolar membrane electrodialysis equipment produces, the regenerated liquid that described Na-ion exchanger produces enters the softening pond of lime, and the product water in the softening pond of lime enters high dense settling pond, and the waste residue that the softening pond of lime produces enters sludge concentration tank, the dense water that described negative and positive EDBM equipment and high pressure reverse osmosis equipment produce, according to reclaiming product crystal salt or soda acid, can switch technique mutually,
Four, deodorization process: the waste gas that high-efficient biological reactor, MBBR, one section, triple effect efficient biochemical pond, two sections, triple effect efficient biochemical pond, three sections, triple effect efficient biochemical pond, four sections, triple effect efficient biochemical pond, second pond, sludge concentration tank produce is collected waste gas through gas skirt, enter high-performance bio reaction deodorizing unit by gas sampling pipe and air-introduced machine, the innocuous gas that high-performance bio reaction deodorizing unit produces, discharges through exhaust chimney; Described air-introduced machine is connected with water circulating pump by automatic control system; Described high-performance bio reaction deodorizing unit is connected with water circulating pump is two-way; Described water circulating pump is connected with cyclic water tank is two-way; Described high-performance bio reaction deodorizing unit comprises washing humidifying section, biological deodorizing section and strengthening segment;
Five, the Treatment of Sludge that coal chemical industry enterprises wastewater treatment produces: the mud of sludge concentration tank is through centrifuge dewatering, and the mud cake of generation can burn or be transported to waste treatment plant's processing outward in boiler of feeding room; The filtrate that sludge concentration tank produces enters homogeneous and all measures regulating reservoir 2;
Six, the accessory substance processing that coal chemical industry enterprises wastewater treatment produces: the oil of oil partiting precipitation pool, inert gas flotation tank, solvent recovery tower, generation, collect and take out; The ammonia that ammonia purifier produces, collects and takes out; The crude phenols that solvent recovery tower produces, collect and take out; The soda acid that bipolar membrane electrodialysis equipment produces, collects reuse or take-away.
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