CN112707607A - Wire drawing waste liquid treatment system and treatment method - Google Patents
Wire drawing waste liquid treatment system and treatment method Download PDFInfo
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- CN112707607A CN112707607A CN202110174374.5A CN202110174374A CN112707607A CN 112707607 A CN112707607 A CN 112707607A CN 202110174374 A CN202110174374 A CN 202110174374A CN 112707607 A CN112707607 A CN 112707607A
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- 239000007788 liquid Substances 0.000 title claims abstract description 160
- 239000002699 waste material Substances 0.000 title claims abstract description 111
- 238000011282 treatment Methods 0.000 title claims abstract description 98
- 238000005491 wire drawing Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims description 32
- 238000003860 storage Methods 0.000 claims abstract description 90
- 239000003814 drug Substances 0.000 claims abstract description 82
- 238000006243 chemical reaction Methods 0.000 claims abstract description 81
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 72
- 239000010802 sludge Substances 0.000 claims abstract description 62
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 51
- 239000010949 copper Substances 0.000 claims abstract description 49
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 48
- 229910052802 copper Inorganic materials 0.000 claims abstract description 46
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 43
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 35
- 230000018044 dehydration Effects 0.000 claims abstract description 28
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 28
- 229910052979 sodium sulfide Inorganic materials 0.000 claims abstract description 25
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000011790 ferrous sulphate Substances 0.000 claims abstract description 24
- 235000003891 ferrous sulphate Nutrition 0.000 claims abstract description 24
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims abstract description 24
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims abstract description 24
- 235000011121 sodium hydroxide Nutrition 0.000 claims abstract description 24
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract description 23
- 229940079593 drug Drugs 0.000 claims abstract description 13
- 239000012528 membrane Substances 0.000 claims abstract description 6
- 239000000706 filtrate Substances 0.000 claims description 64
- 239000000243 solution Substances 0.000 claims description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 34
- 238000003756 stirring Methods 0.000 claims description 32
- 238000005189 flocculation Methods 0.000 claims description 30
- 230000016615 flocculation Effects 0.000 claims description 30
- 238000004062 sedimentation Methods 0.000 claims description 30
- 238000002156 mixing Methods 0.000 claims description 16
- 238000010790 dilution Methods 0.000 claims description 13
- 239000012895 dilution Substances 0.000 claims description 13
- 238000003825 pressing Methods 0.000 claims description 12
- 238000011084 recovery Methods 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 11
- 239000001301 oxygen Substances 0.000 claims description 11
- 229910052760 oxygen Inorganic materials 0.000 claims description 11
- 239000003513 alkali Substances 0.000 claims description 10
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 7
- 238000005273 aeration Methods 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 7
- 239000002957 persistent organic pollutant Substances 0.000 claims description 7
- 230000001376 precipitating effect Effects 0.000 claims description 7
- 238000005086 pumping Methods 0.000 claims description 7
- 239000012535 impurity Substances 0.000 claims description 6
- 238000010992 reflux Methods 0.000 claims description 6
- 238000004064 recycling Methods 0.000 claims description 2
- 238000007865 diluting Methods 0.000 claims 1
- 239000010865 sewage Substances 0.000 abstract description 9
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 239000010842 industrial wastewater Substances 0.000 abstract description 2
- 238000004065 wastewater treatment Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 40
- 230000000052 comparative effect Effects 0.000 description 9
- 239000002351 wastewater Substances 0.000 description 9
- 239000004744 fabric Substances 0.000 description 5
- 230000006698 induction Effects 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 230000003311 flocculating effect Effects 0.000 description 4
- 239000002480 mineral oil Substances 0.000 description 4
- 235000010446 mineral oil Nutrition 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 238000005185 salting out Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- 238000010170 biological method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229910001431 copper ion Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000003721 gunpowder Substances 0.000 description 2
- 238000010297 mechanical methods and process Methods 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 101150054854 POU1F1 gene Proteins 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- OMZSGWSJDCOLKM-UHFFFAOYSA-N copper(II) sulfide Chemical compound [S-2].[Cu+2] OMZSGWSJDCOLKM-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000011221 initial treatment Methods 0.000 description 1
- 231100001240 inorganic pollutant Toxicity 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000002503 metabolic effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
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Classifications
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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
- 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
- C02F11/125—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using screw filters
-
- 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
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/147—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using organic substances
-
- 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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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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
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/42—Liquid level
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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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- 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
- C02F3/30—Aerobic and anaerobic processes
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- Environmental & Geological Engineering (AREA)
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- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention belongs to the technical field of industrial wastewater treatment. A wire drawing waste liquid treatment system comprises a waste liquid collecting tank, an oil removal reaction kettle, a sludge concentration dehydration device, a copper removal reaction kettle, a plate-and-frame filter press and a biological treatment device which are sequentially connected through a pipeline, wherein the biological treatment device sequentially comprises an anaerobic tank, an aerobic tank and an MBR (membrane bioreactor) from a treatment starting end; the treatment system further comprises a plurality of drug storage tanks; the medicine storage tank comprises a demulsifier medicine storage tank, a polyaluminium chloride medicine storage tank, a sodium sulfide medicine storage tank, a sulfuric acid medicine storage tank, a hydrogen peroxide medicine storage tank, a ferrous sulfate medicine storage tank, a plurality of liquid caustic soda medicine storage tanks and a plurality of Polyacrylamide (PAM) medicine storage tanks. The wire drawing waste liquid treatment system has reasonable and compact structure, small occupied area and low infrastructure cost; the automation degree is high, the operation is stable and reliable, and the operation is simple; the sewage treatment capacity is large, the treatment capacity is 500kg/d, the treatment period is short, and the energy consumption is low.
Description
Technical Field
The invention belongs to the technical field of industrial wastewater treatment, and particularly relates to a wire drawing waste liquid treatment system and a wire drawing waste liquid treatment method.
Background
The wire drawing liquid comprises the main components of oil, water and various chemical additives, is widely applied to the field of wires and cables, and plays roles in lubrication, cooling, cleaning, rust prevention and the like in a metal wire drawing process. The copper wire drawing waste liquid contains a large amount of organic mineral oil, surfactant and inorganic pollutants, and the direct discharge has great pollution to the environment. The surface activity contained in the copper wire drawing waste liquid can promote the high dispersion of the oil, the oil is difficult to remove, and the treatment difficulty of the copper wire drawing waste liquid is high.
At present, the treatment of the copper wire drawing waste liquid mainly comprises two steps of demulsification and water quality purification. Common methods include salting out, flocculation, membrane separation, adsorption, etc. The salting-out method has large dosage, low coagulation speed, large occupied area of equipment and poor treatment effect on the wire drawing waste liquid by the surfactant, and generally only serves as a primary treatment means because the settling separation generally takes more than 24 hours. The flocculation method is a widely used method at present, and has the advantages of high treatment speed and high efficiency compared with the salting-out method, but the agent cost is high, the oil-containing sludge generation amount is large, and the subsequent sludge dehydration and treatment problems are caused. The adsorbent in the adsorption method has limited adsorption capacity, higher cost and difficult regeneration, so the adsorbent is generally only used for the advanced treatment of waste liquid. The existing copper wire drawing waste liquid treatment technology has low oil removal efficiency, complex treatment method and high cost.
Disclosure of Invention
The invention aims to solve the technical problem of providing a wire drawing waste liquid treatment system which is reasonable and compact in structure, small in occupied area and low in infrastructure cost; the automation degree is high, the operation is stable and reliable, and the operation is simple; the sewage treatment capacity is large, the treatment capacity is 500kg/d, the treatment period is short, and the energy consumption is low. The treatment method for the treatment system combines a demulsification method, a flocculation method, a biological method and a mechanical method, can effectively remove pollutants such as metallic copper, mineral oil and the like in the waste liquid, and the treated waste water meets the sewage discharge standard and can be diluted and recycled.
The technical scheme of the invention is as follows:
a wire drawing waste liquid treatment system comprises a waste liquid collecting tank, an oil removal reaction kettle, a sludge concentration dehydration device, a copper removal reaction kettle, a plate-and-frame filter press and a biological treatment device which are sequentially connected through a pipeline, wherein the biological treatment device sequentially comprises an anaerobic tank, an aerobic tank and an MBR (membrane bioreactor) from a treatment starting end;
the treatment system further comprises a plurality of drug storage tanks;
the medicine storage tank comprises a demulsifier medicine storage tank, a polyaluminium chloride (PAC) medicine storage tank, a sodium sulfide medicine storage tank, a sulfuric acid medicine storage tank, a hydrogen peroxide medicine storage tank, a ferrous sulfate medicine storage tank, a plurality of liquid caustic soda medicine storage tanks and a plurality of Polyacrylamide (PAM) medicine storage tanks;
the demulsifier medicine storage tank, the liquid caustic soda medicine storage tank and the polyaluminium chloride medicine storage tank are connected with an inlet of the oil removal reaction kettle through a metering pump;
the polyacrylamide medicine storage tank is connected with an inlet of the sludge concentration and dehydration device through a metering pump;
the sodium sulfide medicine storage tank, the sulfuric acid medicine storage tank, the liquid caustic soda medicine storage tank, the hydrogen peroxide medicine storage tank, the ferrous sulfate medicine storage tank and the polyacrylamide medicine storage tank are respectively connected with the inlet of the decoppering reaction kettle through a metering pump.
Furthermore, the waste liquid collecting pool comprises a plurality of sub-collecting pools, the sub-collecting pools are connected through a connecting pipeline according to the principle of a communicating vessel, the sub-collecting pools are guaranteed to have the same liquid level height, and the stable and reliable operation of an automatic system is guaranteed when the amount of waste liquid is large. The installation is convenient, the occupied area is small, the installation number of the sub-collecting tanks can be flexibly adjusted according to the actual sewage treatment capacity, and the device can adapt to different application scenes and installation sites.
Furthermore, the sub-collecting pool is a nodal cylinder, and the waste liquid collecting amount can be judged according to the capacity of each cavity of the sub-collecting pool, so that the waste liquid amount can be conveniently evaluated.
Further, the waste liquid collecting tank inner wall is equipped with the liquid level sensor, the deoiling reation kettle is equipped with the weight inductor, the waste liquid collecting tank through the measuring pump with the deoiling reation kettle links to each other, measuring pump, liquid level induction system and weight induction system access automatic control system.
Further, the sludge concentration and dehydration device comprises a flocculation mixing tank, an electric control cabinet, a stacked screw type sludge dehydrator and a sedimentation tank; the flocculation mixing tank is arranged on the sedimentation tank and is connected with the polyacrylamide medicine storage tank; the flocculation mixing tank is electrically connected with the electric control cabinet; the stacked screw type sludge dewatering machine is obliquely arranged on the sedimentation tank, and the lower end of the stacked screw type sludge dewatering machine is connected with the flocculation mixing tank through a pipeline; fold spiral shell formula sludge dewaterer lower part and be equipped with hourglass hopper-shaped filtrating accumulator, filtrating accumulator high-order end is equipped with the sludge discharge port, filtrating accumulator low-order end bottom is equipped with the filtrating discharge port, the filtrating discharge port with the water inlet of sedimentation tank links to each other.
The sludge concentration and dehydration device is integrated by a flocculation mixing tank, a stacked screw type sludge dehydrator and a sedimentation tank, and has small floor area and low capital construction cost. The flocculation mixing tank is electrically connected with the electric control cabinet, the automation degree is high, sludge flocculation, concentration, squeezing dehydration, sludge discharge and sewage discharge are all carried out under full-automatic conditions, the treatment efficiency is high, and the treatment capacity is large. The filtrate recovery tank is arranged below the stacked spiral sludge dewatering machine, filtrate can be directly discharged to the recovery tank, additional pipelines and mechanical preparation are not needed, high mud-water separation efficiency can be guaranteed, the capital construction cost is low, and the energy consumption is low.
Further, the inner wall of the sedimentation tank is provided with a liquid level sensor, the inner wall of the copper removal reaction kettle is provided with a weight sensor, the sedimentation tank is connected with the copper removal reaction kettle through a metering pump, and the metering pump, the liquid level sensing device and the weight sensing device are connected into an automatic control system, such as a PLC system.
Can realize the automatic control to waste liquid level in the sedimentation tank and remove among the copper reation kettle waste liquid weight, liquid level induction system detects sedimentation tank waste liquid level and is higher than the setting value, with automatic control dosage pump waste liquid extraction to removing the copper reation kettle in with the sedimentation tank, the weight inductor detects that waste liquid quality is higher than the setting value in removing the copper reation kettle, stops the waste liquid extraction with the automatic control measuring pump, realizes the sedimentation tank and removes the waste liquid control among the copper reation kettle.
Furthermore, the plate-and-frame filter press comprises a filter plate, a filter frame, filter cloth and a pressing device, the filter plate and the filter frame are arranged at intervals, the filter cloth is arranged on two sides of the filter plate, the filter plate and the filter frame are communicated with the pressing device to be pressed, a filter pressing chamber is formed between the filter plate and the filter frame, through holes are formed in the same positions of the filter plate and the filter frame, and the through holes are communicated with the filter pressing chamber.
The wastewater can enter the filter-pressing chamber through the through holes, and is discharged out of the filter machine through the filter cloth, the ditch groove and the pore channel under the pressure effect, so that the sludge is dehydrated. The plate-and-frame filter press has the advantages of simple structure, easy operation, stable operation and high dehydration efficiency.
Further, a sludge tank is connected between the copper removal reaction kettle and the plate-and-frame filter press.
Furthermore, aeration systems are arranged at the bottoms of the oil removal reaction kettle, the sludge tank, the anaerobic tank and the aerobic tank, each aeration system comprises an oxygen supply device, the oxygen supply devices are respectively arranged at the tops of the oil removal reaction kettle, the sludge tank, the anaerobic tank and the aerobic tank, and the oxygen supply devices are roots blowers.
The aeration system that deoiling reation kettle was equipped with can produce a large amount of bubbles in waste water, and mineral oil fat is attached to the bubble surface, and aeration system locates the reation kettle bottom, and the grease of adhesion on the bubble can be in waste water with the fully contact of reactant, shorten reaction time, improve deoiling reaction efficiency, effectively avoided polluting the deoiling reaction inadequately that dirty partial deposit of part leads to.
Further, a PH meter is arranged on the oil removal reaction kettle and the copper removal reaction kettle, and the PH meter, the metering pump connected with the liquid caustic soda storage tank and the metering pump connected with the sulfuric acid storage tank are connected to an automatic control system, such as a PLC system.
The automatic control of the PH value of the waste liquid in the oil removal reaction kettle and the copper removal reaction kettle can be realized, when the PH value of the waste liquid detected by the PH meter is higher than a set value, the dosage pump connected with the sulfuric acid storage tank is automatically controlled, sulfuric acid is added into the copper removal reaction kettle, and when the PH value of the waste liquid detected by the PH meter is within a set value range, the acid addition is stopped; the PH meter detects that the PH value of the waste liquid is lower than a set value, a dosage pump connected with the liquid caustic soda storage tank is automatically controlled, liquid caustic soda is added into the copper removal reaction kettle or the oil removal reaction kettle, the PH meter detects that the PH value of the waste liquid stops adding alkali within the range of the set value, and the automatic control of the PH value of the waste liquid in the copper removal reaction kettle or the oil removal reaction kettle is realized.
The treatment method of the drawing waste liquid treatment system comprises the following steps:
s1, collecting the wire drawing waste liquid in a waste liquid collecting tank, and uniformly stirring;
s2, oil removal: transferring the waste liquid into an oil removal reaction kettle, adding water for dilution, adding a demulsifier and a polyaluminium chloride solution, stirring for oil removal, and adding caustic soda liquid during stirring to adjust the pH value of the waste liquid to be within the range of 8-9;
s3, transferring the deoiled waste liquid into a sludge concentration and dehydration device, adding a polyacrylamide solution, discharging the sludge after flocculation, concentration and dehydration, and refluxing the filtrate to a sedimentation tank through a filtrate recovery tank;
s4, copper removal: standing and precipitating the filtrate, pumping the filtrate into a copper removal reaction kettle, adding water for dilution, adding hydrogen peroxide and a ferrous sulfate solution, stirring for reaction, adding sulfuric acid in the reaction process to adjust the pH value of the filtrate to 6, and adding liquid alkali after the reaction is completed, wherein the pH value is adjusted to be within the range of 7.3-8.0; adding a sodium sulfide solution, stirring and reacting completely, and then adding an acrylamide solution for flocculation;
s5, removing copper from the filtrate, and then dehydrating and removing impurities by using a plate-and-frame filter press;
and S6, removing organic pollutants from the filter liquor after filter pressing by using a biological treatment device.
Further, the demulsifier is a biological demulsifier PRJ.
Further, the concentration of the liquid caustic soda is 45-50%, the concentration of the ferrous sulfate solution is 10-15%, the concentration of the polyaluminum chloride solution is 10-15%, the concentration of the polyacrylamide solution is 1-1.5 per mill, the concentration of the sulfuric acid is 30-50%, the concentration of the hydrogen peroxide is 30-40%, and the concentration of the sodium sulfide solution is 8-10%.
Further, in step S2, the mass ratio of the waste liquid to the water is 1:2-3, the mass ratio of the waste liquid to the demulsifier to the polyaluminium chloride solution is 20:1-3:4-5, and the oil removal time is 15-20 min; in step S4, the mass ratio of the filtrate to the water is 2-3:1, and the mass ratio of the filtrate, the polyacrylamide solution, the hydrogen peroxide, the sodium sulfide and the ferrous sulfate is 330: 1-4: 1-3: 1-2: 10-20, and the total processing time of the step S4 is 0.5-1 h.
The invention has the following beneficial effects:
the wire drawing waste liquid treatment system has the advantages of reasonable and compact structure, small occupied area and low infrastructure cost; the automation degree is high, the operation is stable and reliable, and the operation is simple; the sewage treatment capacity is large, the treatment capacity is 500kg/d, the treatment period is short, and the energy consumption is low.
According to the method for treating the wiredrawing waste liquid, the demulsifier and the polyaluminium chloride are added into the oil removal reaction kettle, so that oil-water separation of the waste water is realized, liquid alkali is added, a good alkaline environment can be provided for oil-water separation reaction, and high efficiency and high speed of the reaction are ensured. The reaction rate of the reaction is highest under the acidic condition, and the addition of the liquid alkali and the sulfuric acid provides good reaction conditions, so that the reaction efficiency is effectively improved, and the reaction time is shortened. Sodium sulfide is added to react with copper ions to generate copper sulfide precipitate, and the precipitate and pollutants are flocculated and deposited under the action of polyacrylamide, so that the copper ions in the wastewater are effectively removed. After oil content, sludge and most organic matters in the waste liquid are removed, copper removal reaction is carried out, the using amount of a copper removal reagent can be reduced, and the copper removal efficiency is greatly improved. And (3) decomposing and removing a small amount of organic pollutants in the filtrate after the dehydration of the plate-and-frame filter press by using the metabolic activity of microorganisms through a biological treatment device. The wastewater after treatment meets the sewage discharge standard and can be diluted and recycled.
Drawings
FIG. 1 is a schematic structural diagram of a drawing waste liquid treatment system according to the present invention;
FIG. 2 is a schematic view of a waste liquid collection tank in the wire drawing waste liquid treatment system according to the present invention;
FIG. 3 is a schematic structural diagram of a sludge thickening and dewatering device in the wire drawing waste liquid treatment system according to the present invention;
1. a waste liquid collecting tank, 11 liquid level sensors, 12 weight sensors, 13 metering pumps, 14 sub-collecting tanks, 15 pipelines, 2 oil removal reaction kettles, 21 PH meters, 3 sludge concentration and dehydration devices, 31 flocculation mixing tanks, 32 stacked spiral sludge dewaterers, 33 sedimentation tanks, 34 filtrate recovery tanks, 35 sludge discharge ports, 36 filtrate discharge ports, 37 electric control cabinets, 4 decoppering reaction kettles, 5. the system comprises a sludge tank, 51 an aeration system, 52 an oxygen supply device, 6 a plate-and-frame filter press, 7 a biological treatment device, 71 an anaerobic tank, 72 an aerobic tank, 73.MBR (membrane bioreactor), 8 a drug storage tank, 81 a demulsifier drug storage tank, 82 a polyaluminium chloride drug storage tank, 83 a sodium sulfide drug storage tank, 84 a sulfuric acid drug storage tank, 85 a hydrogen peroxide drug storage tank, 86 a ferrous sulfate drug storage tank, 87 a liquid caustic soda drug storage tank and 88 a polyacrylamide drug storage tank.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples, which are only preferred embodiments of the present invention and are not intended to limit the present invention.
A wire drawing waste liquid treatment system is shown in figures 1-3 and comprises a waste liquid collecting tank 1, an oil removal reaction kettle 2, a sludge concentration dehydration device 3, a copper removal reaction kettle 4, a sludge tank 5, a plate-and-frame filter press 6 and a biological treatment device 7 which are sequentially connected through pipelines; the biochemical treatment device comprises an anaerobic tank 71, an aerobic tank 72 and an MBR (membrane bioreactor) 73 from the treatment starting end in sequence;
the treatment system further comprises a plurality of drug storage tanks 8;
the medicine storage tank 8 comprises a demulsifier medicine storage tank 81, a polyaluminium chloride (PAC) medicine storage tank 82, a sodium sulfide medicine storage tank 83, a sulfuric acid medicine storage tank 84, a hydrogen peroxide medicine storage tank 85, a ferrous sulfate medicine storage tank 86, a plurality of liquid caustic soda medicine storage tanks 87 and a plurality of Polyacrylamide (PAM) medicine storage tanks;
the demulsifier medicine storage tank 81, the liquid caustic soda medicine storage tank 87 and the polyaluminium chloride medicine storage tank 82 are connected with the inlet of the oil removal reaction kettle 2 through a metering pump 13;
the polyacrylamide medicine storage tank 88 is connected with the inlet of the sludge concentration dehydration device 3 through a metering pump 13;
the sodium sulfide medicine storage tank 83, the sulfuric acid medicine storage tank 84, the liquid caustic soda medicine storage tank 87, the hydrogen peroxide medicine storage tank 85, the ferrous sulfate medicine storage tank 86 and the polyacrylamide medicine storage tank 88 are respectively connected with the inlet of the decoppering reaction kettle 4 through a metering pump 13.
The waste liquid collecting tank 1 comprises two sub-collecting tanks 14, a connecting pipeline 15 is connected between the two sub-collecting tanks 14 according to the principle of a communicating vessel, and the sub-collecting tanks 14 are nodal-shaped cylinders.
Wherein, 1 inner wall in waste liquid collecting pit is equipped with liquid level sensor 11, deoiling reation kettle 2 is equipped with weight inductor 12, waste liquid collecting pit 1 through metering pump 13 with deoiling reation kettle 2 links to each other, metering pump 13, liquid level sensing device and weight sensing device access automatic control system.
Wherein, the sludge concentration dehydration device 3 comprises a flocculation mixing tank 31, an electric control cabinet 37, a stacked screw type sludge dehydrator 32 and a sedimentation tank 33; the flocculation mixing tank 31 is arranged on the sedimentation tank 33, and the flocculation mixing tank 31 is connected with the polyacrylamide medicine storage tank 88; the flocculation mixing tank 31 is electrically connected with the electric control cabinet 37; the stacked spiral sludge dewatering machine 32 is obliquely arranged on the sedimentation tank 33, and the lower end of the stacked spiral sludge dewatering machine 32 is connected with the flocculation mixing tank 31 through a pipeline; the lower part of the spiral-stacked sludge dewatering machine 32 is provided with a funnel-shaped filtrate recovery tank 34, the high-position end of the filtrate recovery tank 34 is provided with a sludge discharge port 35, the bottom of the low-position end of the filtrate recovery tank 34 is provided with a filtrate discharge port 36, and the filtrate discharge port 36 is connected with a water inlet of the sedimentation tank 33.
Wherein, the inner wall of sedimentation tank 33 is equipped with liquid level sensor 11, it is equipped with weight inductor 12 to remove 4 inner walls of copper reation kettle, sedimentation tank 33 through metering pump 13 with it links to each other to remove copper reation kettle 4, metering pump 13, liquid level induction system and weight induction system access PLC system.
The plate-and-frame filter press 6 comprises a filter plate, filter frames, filter cloth and a pressing device, the filter plate and the filter frames are arranged at intervals, the filter cloth is arranged on two sides of the filter plate, the filter plate and the filter frames are communicated with the pressing device to be pressed, filter press chambers are formed between the filter plate and the filter frames, through holes are formed in the same positions of the filter plate and the filter frames, and the through holes are communicated with the filter press chambers.
The bottom of the oil removal reaction kettle 2, the bottom of the sludge tank 5, the bottom of the anaerobic tank 71 and the bottom of the aerobic tank 72 are all provided with sludge tanks 51, each sludge tank 51 comprises an oxygen supply device 52, the oxygen supply devices 52 are respectively arranged at the tops of the oil removal reaction kettle 2, the sludge tank 5, the anaerobic tank 71 and the top of the aerobic tank 72, and the oxygen supply devices 52 are roots blowers.
Wherein, be equipped with PH meter 21 on deoiling reation kettle 2 and the decoppering reation kettle 4, PH meter 21, with liquid caustic soda gunpowder storage tank 87 links to each other metering pump 13, with sulphuric acid gunpowder storage tank 84 links to each other metering pump 13 inserts the PLC system.
Example 1
The treatment capacity of the wire drawing waste liquid treatment system is 500kg, and the treatment method comprises the following steps:
s1, collecting the wire drawing waste liquid in a waste liquid collecting tank, and uniformly stirring;
s2, oil removal: transferring the waste liquid into an oil removal reaction kettle, adding water for dilution, adding a demulsifier PRJ and a 10% polyaluminium chloride solution, stirring for oil removal, and adding 45% liquid caustic soda in the stirring process to adjust the pH value of the waste liquid to 9; the mass ratio of the waste liquid to the water is 1:3, the mass ratio of the waste liquid to the demulsifier to the polyaluminium chloride solution is 20:3:4, and the oil removing time is 15 min;
s3, transferring the deoiled waste liquid into a sludge concentration dehydration device, adding a polyacrylamide solution with the concentration of 1 per mill, discharging the sludge after flocculation, concentration and dehydration, and refluxing the filtrate to a sedimentation tank through a filtrate recovery tank;
s4, copper removal: standing and precipitating the filtrate, pumping the filtrate into a copper removal reaction kettle, adding water for dilution, adding 30% hydrogen peroxide and 10% ferrous sulfate solution, stirring for reaction, adding 30% sulfuric acid in the reaction process to adjust the pH of the filtrate to 6, adding 45% liquid alkali after the reaction is completed, and adjusting the pH value to be within the range of 7.3-8.0; adding 10% sodium sulfide solution, stirring to react completely, adding 1-1.5 ‰ acrylamide solution, and flocculating; the mass ratio of the filtrate to the water is 3:1, and the mass ratio of the filtrate to the polyacrylamide solution to the hydrogen peroxide to the sodium sulfide to the ferrous sulfate is 330: 4: 3: 2: 20, the total processing time of the step S4 is 1 h;
s5, removing copper from the filtrate, and then dehydrating and removing impurities by using a plate-and-frame filter press;
and S6, removing organic pollutants from the filter liquor after filter pressing by using a biological treatment device.
Example 2
The treatment capacity of the wire drawing waste liquid treatment system is 500kg, and the treatment method comprises the following steps:
s1, collecting the wire drawing waste liquid in a waste liquid collecting tank, and uniformly stirring;
s2, oil removal: transferring the waste liquid into an oil removal reaction kettle, adding water for dilution, adding a demulsifier PRJ and a polyaluminum chloride solution with the concentration of 15%, stirring for oil removal, and adding liquid caustic soda with the concentration of 50% during stirring to adjust the pH value of the waste liquid to 9; the mass ratio of the waste liquid to the water is 1:2, the mass ratio of the waste liquid to the demulsifier to the polyaluminium chloride solution is 20:1:4, and the oil removing time is 15 min;
s3, transferring the deoiled waste liquid into a sludge concentration and dehydration device, adding a polyacrylamide solution with the concentration of 1.5 per mill, discharging the sludge after flocculation, concentration and dehydration, and refluxing the filtrate to a sedimentation tank through a filtrate recovery tank;
s4, copper removal: standing and precipitating the filtrate, pumping the filtrate into a copper removal reaction kettle, adding water for dilution, adding 40% hydrogen peroxide and 15% ferrous sulfate solution, stirring for reaction, adding 50% sulfuric acid in the reaction process to adjust the pH value of the filtrate to 5, adding 50% liquid alkali after the reaction is completed, and adjusting the pH value to be within the range of 7.3-8.0; adding 10% sodium sulfide solution, stirring to react completely, adding 1.5 ‰ acrylamide solution, and flocculating; the mass ratio of the filtrate to the water is 3:1, and the mass ratio of the filtrate to the polyacrylamide solution to the hydrogen peroxide to the sodium sulfide to the ferrous sulfate is 330: 1: 1: 1: 10, the total processing time of the step S4 is 1 h;
s5, removing copper from the filtrate, and then dehydrating and removing impurities by using a plate-and-frame filter press;
s6, removing organic pollutants from the filter-pressed filtrate through a biological treatment device, and then recycling the filter-pressed filtrate.
Example 3
The treatment capacity of the wire drawing waste liquid treatment system is 500kg, and the treatment method comprises the following steps:
s1, collecting the wire drawing waste liquid in a waste liquid collecting tank, and uniformly stirring;
s2, oil removal: transferring the waste liquid into an oil removal reaction kettle, adding water for dilution, adding a demulsifier PRJ and a polyaluminum chloride solution with the concentration of 10-15%, stirring for oil removal, and adding liquid caustic soda with the concentration of 50% in the stirring process to adjust the pH value of the waste liquid to be within 9; the mass ratio of the waste liquid to the water is 1:2, the mass ratio of the waste liquid to the demulsifier to the polyaluminium chloride solution is 20:1:4, and the oil removing time is 15 min;
s3, transferring the deoiled waste liquid into a sludge concentration dehydration device, adding a polyacrylamide solution with the concentration of 1 per mill, discharging the sludge after flocculation, concentration and dehydration, and refluxing the filtrate to a sedimentation tank through a filtrate recovery tank;
s4, copper removal: standing and precipitating the filtrate, pumping the filtrate into a copper removal reaction kettle, adding water for dilution, adding 30% hydrogen peroxide and 10% ferrous sulfate solution, stirring for reaction, adding 30% sulfuric acid in the reaction process to adjust the pH of the filtrate to 6, adding 50% liquid alkali after the reaction is completed, and adjusting the pH value to be within the range of 7.3-8.0; adding 10% sodium sulfide solution, stirring to react completely, adding 1-1.5 ‰ acrylamide solution, and flocculating; the mass ratio of the filtrate to the water is 2:1, and the mass ratio of the filtrate to the polyacrylamide solution to the hydrogen peroxide to the sodium sulfide to the ferrous sulfate is 330: 2: 2: 1: 15, the total processing time of the step S4 is 0.5 h;
s5, removing copper from the filtrate, and then dehydrating and removing impurities by using a plate-and-frame filter press;
and S6, removing organic pollutants from the filter liquor after filter pressing by using a biological treatment device.
Comparative example 1
The treatment capacity of the wire drawing waste liquid treatment system is 500kg, and the treatment method comprises the following steps:
s1, collecting the wire drawing waste liquid in a waste liquid collecting tank, and uniformly stirring;
s2, oil removal: transferring the waste liquid into an oil removal reaction kettle, adding water for dilution, adding a demulsifier PRJ and a 10% polyaluminium chloride solution, stirring for oil removal, and adding 45% liquid caustic soda in the stirring process to adjust the pH value of the waste liquid to 12; the mass ratio of the waste liquid to the water is 1:3, the mass ratio of the waste liquid to the demulsifier to the polyaluminium chloride solution is 20:3:4, and the oil removing time is 15 min;
s3, transferring the deoiled waste liquid into a sludge concentration dehydration device, adding a polyacrylamide solution with the concentration of 1 per mill, discharging the sludge after flocculation, concentration and dehydration, and refluxing the filtrate to a sedimentation tank through a filtrate recovery tank;
s4, copper removal: standing and precipitating the filtrate, pumping the filtrate into a copper removal reaction kettle, adding water for dilution, adding 30% hydrogen peroxide and 10% ferrous sulfate solution, stirring for reaction, adding 45% liquid alkali in the reaction process, and adjusting the pH value to be within the range of 7.3-8.0; adding 10% sodium sulfide solution, stirring to react completely, adding 1-1.5 ‰ acrylamide solution, and flocculating; the mass ratio of the filtrate to the water is 3:1, and the mass ratio of the filtrate to the polyacrylamide solution to the hydrogen peroxide to the sodium sulfide to the ferrous sulfate is 330: 4: 3: 2: 20, the total processing time of the step S4 is 1 h;
s5, removing copper from the filtrate, and then dehydrating and removing impurities by using a plate-and-frame filter press;
and S6, removing organic pollutants from the filter liquor after filter pressing by using a biological treatment device.
Comparative example 2
Comparative example 2 differs from example 1 in that step S4: standing and precipitating the filtrate, pumping the filtrate into a copper removal reaction kettle, adding water for dilution, adding liquid alkali with the concentration of 45%, adjusting the pH value to be within the range of 7.3-8.0, adding a sodium sulfide solution with the concentration of 10%, stirring the mixture completely, and adding an acrylamide solution with the concentration of 1-1.5 per mill for flocculation; adding 30% hydrogen peroxide and 10% ferrous sulfate solution, stirring for reaction, and adding 30% sulfuric acid to adjust the pH of the filtrate to 6; the mass ratio of the filtrate to water after the reaction is completed is 3:1, and the mass ratio of the filtrate to the polyacrylamide solution to the hydrogen peroxide to the sodium sulfide to the ferrous sulfate is 330: 4: 3: 2: 20, the total processing time of the step S4 is 1 h;
comparative example 3
Comparative example 3 differs from example 1 in that a polyacrylamide solution with a concentration of 5% is used.
The COD removal rate and the Cu removal rate of the wastewater of 3 examples and 3 comparative examples of the treatment method of the wiredrawing waste liquid treatment system are tested, and the test results are shown in the following table:
| test items | Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| COD removal rate | 86.8% | 88.9% | 87.2% | 82.4% | 78.6% | 84.5% |
| Cu removal rate | 95.8% | 97.2% | 96.3% | 91.9% | 82.5% | 93.1% |
Therefore, the treatment method of the wiredrawing waste liquid treatment system has the advantages of high COD removal rate and Cu removal rate, short treatment time and high treatment efficiency.
The wire drawing waste liquid treatment system has the advantages of reasonable and compact structure, small occupied area and low infrastructure cost; the automation degree is high, the operation is stable and reliable, and the operation is simple; the sewage treatment capacity is large, the treatment period is short, and the energy consumption is low.
The treatment method for the treatment system combines a demulsification method, a flocculation method, a biological method and a mechanical method, can effectively remove pollutants such as metallic copper, mineral oil and the like in the waste liquid, and the treated waste water meets the sewage discharge standard and can be diluted and recycled.
Claims (10)
1. A wire drawing waste liquid treatment system is characterized by comprising a waste liquid collecting tank, an oil removing reaction kettle, a sludge concentration and dehydration device, a copper removing reaction kettle, a plate-and-frame filter press and a biological treatment device which are sequentially connected through a pipeline, wherein the biological treatment device sequentially comprises an anaerobic tank, an aerobic tank and an MBR (membrane bioreactor) from a treatment starting end;
the treatment system further comprises a plurality of drug storage tanks;
the medicine storage tank comprises a demulsifier medicine storage tank, a polyaluminium chloride (PAC) medicine storage tank, a sodium sulfide medicine storage tank, a sulfuric acid medicine storage tank, a hydrogen peroxide medicine storage tank, a ferrous sulfate medicine storage tank, a plurality of liquid caustic soda medicine storage tanks and a plurality of Polyacrylamide (PAM) medicine storage tanks;
the demulsifier medicine storage tank, the liquid caustic soda medicine storage tank and the polyaluminium chloride medicine storage tank are connected with an inlet of the oil removal reaction kettle through a metering pump;
the polyacrylamide medicine storage tank is connected with an inlet of the sludge concentration and dehydration device through a metering pump;
the sodium sulfide medicine storage tank, the sulfuric acid medicine storage tank, the liquid caustic soda medicine storage tank, the hydrogen peroxide medicine storage tank, the ferrous sulfate medicine storage tank and the polyacrylamide medicine storage tank are respectively connected with the inlet of the decoppering reaction kettle through a metering pump.
2. The wire drawing waste liquid treatment system according to claim 1, wherein a liquid level sensor is arranged on the inner wall of the waste liquid collecting tank, a weight sensor is arranged on the oil removing reaction kettle, the waste liquid collecting tank is connected with the oil removing reaction kettle through a metering pump, and the metering pump, the liquid level sensing device and the weight sensing device are connected into an automatic control system.
3. The wire drawing waste liquid treatment system according to claim 1, wherein the sludge concentration and dehydration device comprises a flocculation mixing tank, an electric control cabinet, a stacked screw type sludge dewatering machine and a sedimentation tank; the flocculation mixing tank is arranged on the sedimentation tank and is connected with the polyacrylamide medicine storage tank; the flocculation mixing tank is electrically connected with the electric control cabinet; the stacked screw type sludge dewatering machine is obliquely arranged on the sedimentation tank, and the lower end of the stacked screw type sludge dewatering machine is connected with the flocculation mixing tank through a pipeline; fold spiral shell formula sludge dewaterer lower part and be equipped with hourglass hopper-shaped filtrating accumulator, filtrating accumulator high-order end is equipped with the sludge discharge port, filtrating accumulator low-order end bottom is equipped with the filtrating discharge port, the filtrating discharge port with the water inlet of sedimentation tank links to each other.
4. The wire drawing waste liquid treatment system according to claim 3, wherein a liquid level sensor is arranged on the inner wall of the sedimentation tank, a weight sensor is arranged on the inner wall of the copper removal reaction kettle, the sedimentation tank is connected with the copper removal reaction kettle through a metering pump, and the metering pump, the liquid level sensing device and the weight sensing device are connected into an automatic control system.
5. The wire drawing waste liquid treatment system according to claim 1, wherein a sludge tank is connected between the copper removal reaction kettle and the plate-and-frame filter press; the bottom of deoiling reation kettle, sludge tank, anaerobism pond and good oxygen pond all is equipped with aeration systems, every aeration systems includes an apparatus of oxygen supply, apparatus of oxygen supply is located respectively the top in deoiling reation kettle, sludge tank, anaerobism pond and good oxygen pond.
6. The wire drawing waste liquid treatment system according to claim 1, wherein PH meters are arranged on the oil removal reaction kettle and the copper removal reaction kettle, and the PH meters, the metering pump connected with the liquid caustic soda storage tank and the metering pump connected with the sulfuric acid storage tank are connected to an automatic control system.
7. The treatment method of the drawing waste liquid treatment system according to any one of claims 1 to 6, comprising the steps of:
s1, collecting the wire drawing waste liquid in a waste liquid collecting tank, and uniformly stirring;
s2, oil removal: transferring the waste liquid into an oil removal reaction kettle, adding water for dilution, adding a demulsifier and a polyaluminium chloride solution, stirring for oil removal, and adding caustic soda liquid during stirring to adjust the pH value of the waste liquid to be within the range of 8-9;
s3, transferring the deoiled waste liquid into a sludge concentration and dehydration device, adding a polyacrylamide solution, discharging the sludge after flocculation, concentration and dehydration, and refluxing the filtrate to a sedimentation tank through a filtrate recovery tank;
s4, copper removal: standing and precipitating the filtrate, pumping the filtrate into a copper removal reaction kettle, adding water for dilution, adding hydrogen peroxide and a ferrous sulfate solution, stirring for reaction, adding sulfuric acid in the reaction process to adjust the pH value of the filtrate to 6, and adding liquid alkali after the reaction is completed, wherein the pH value is adjusted to be within the range of 7.3-8.0; adding a sodium sulfide solution, stirring and reacting completely, and then adding an acrylamide solution for flocculation;
s5, removing copper from the filtrate, and then dehydrating and removing impurities by using a plate-and-frame filter press;
s6, removing organic pollutants from the filter liquor after filter pressing through a biological treatment device, and then discharging or diluting for recycling.
8. The treatment method of claim 7, wherein the demulsifier is a bio-demulsifier PRJ.
9. The treatment method according to claim 7, wherein the concentration of the liquid caustic soda is 45-50%, the concentration of the ferrous sulfate solution is 10-15%, the concentration of the polyaluminum chloride solution is 10-15%, the concentration of the polyacrylamide solution is 1-1.5 per mill, the concentration of the sulfuric acid is 30-50%, the concentration of the hydrogen peroxide is 30-40%, and the concentration of the sodium sulfide solution is 8-10%.
10. The treatment method according to claim 9, wherein in step S2, the mass ratio of the waste liquid to the water is 1:2-3, the mass ratio of the waste liquid to the demulsifier to the polyaluminium chloride solution is 20:1-3:4-5, and the oil removal time is 20-30 min; in step S4, the mass ratio of the filtrate to the water is 2-3:1, and the mass ratio of the filtrate, the polyacrylamide solution, the hydrogen peroxide, the sodium sulfide and the ferrous sulfate is 330: 1-4: 1-3: 1-2: 10-20, and the total processing time of the step S4 is 1-1.5 h.
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Application publication date: 20210427 |