CN112174400A - Novel processing system of old and useless emulsion - Google Patents
Novel processing system of old and useless emulsion Download PDFInfo
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- CN112174400A CN112174400A CN202011105204.3A CN202011105204A CN112174400A CN 112174400 A CN112174400 A CN 112174400A CN 202011105204 A CN202011105204 A CN 202011105204A CN 112174400 A CN112174400 A CN 112174400A
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- 239000000839 emulsion Substances 0.000 title claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 174
- 239000010802 sludge Substances 0.000 claims abstract description 43
- 239000002699 waste material Substances 0.000 claims abstract description 43
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 38
- 230000003647 oxidation Effects 0.000 claims abstract description 36
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 36
- 238000004062 sedimentation Methods 0.000 claims abstract description 24
- 230000003197 catalytic effect Effects 0.000 claims abstract description 20
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 12
- 239000000945 filler Substances 0.000 claims description 15
- 238000000926 separation method Methods 0.000 claims description 13
- 238000004321 preservation Methods 0.000 claims description 11
- 238000007790 scraping Methods 0.000 claims description 8
- 239000003054 catalyst Substances 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229920000742 Cotton Polymers 0.000 claims description 4
- 239000006004 Quartz sand Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 239000003814 drug Substances 0.000 claims 1
- 238000009413 insulation Methods 0.000 claims 1
- 238000001035 drying Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 230000015556 catabolic process Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 238000004064 recycling Methods 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 238000004945 emulsification Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 239000002085 irritant Substances 0.000 description 1
- 231100000021 irritant Toxicity 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000005185 salting out Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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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
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
-
- 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
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
-
- 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
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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- 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
- C02F1/5281—Installations for water purification using chemical agents
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- 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
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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Abstract
本发明公开了一种新型废旧乳化液的处理系统，破乳反应器、中间水池、湿式催化氧化塔、电催化氧化池、斜板沉淀池、臭氧反应器、介质过滤器、储水箱依次连接；所述的破乳反应器连接有破乳剂加药装置、分离剂加药装置、油水深度分离器、中间水池，并且油水分离器一侧设置有第一水泵通过管道连接着破乳反应器，另一侧设置有油泵；斜板沉淀池连接有PAC加药装置、PAM加药装置，斜板沉淀池的输出端连接污泥脱水机，污泥脱水机输出端连接低温污泥干燥机，臭氧反应器一端设置有臭氧发生器，臭氧反应器的输出端通过管道与介质过滤器相连接。该一种新型废旧乳化液的处理系统可将废旧乳化液分离油后的水中COD降解的相对彻底，经过处理过后的水可实现排放。
The invention discloses a novel waste emulsion treatment system. A demulsification reactor, an intermediate water tank, a wet catalytic oxidation tower, an electrocatalytic oxidation tank, an inclined plate sedimentation tank, an ozone reactor, a medium filter and a water storage tank are connected in sequence; The demulsifier reactor is connected with a demulsifier dosing device, a separating agent dosing device, an oil-water depth separator, and an intermediate pool, and a first water pump is provided on one side of the oil-water separator, which is connected to the demulsifier reactor through a pipeline, and the other is connected to the demulsifier reactor. There is an oil pump on one side; the inclined plate sedimentation tank is connected with a PAC dosing device and a PAM dosing device, the output end of the inclined plate sedimentation tank is connected to a sludge dewatering machine, and the output end of the sludge dewatering machine is connected to a low-temperature sludge dryer. One end of the device is provided with an ozone generator, and the output end of the ozone reactor is connected with a medium filter through a pipeline. The novel waste emulsion treatment system can relatively completely degrade COD in water after the waste emulsion is separated from oil, and the treated water can be discharged.
Description
Technical Field
The invention relates to the technical field of waste emulsion treatment, in particular to a novel waste emulsion treatment system.
Background
In the modern industry, a large amount of waste emulsion is discharged in the deep processing production process of nonferrous metals. The waste emulsion is hazardous waste, toxic, harmful, irritant and corrosive, and needs to be treated. The treatment technology of the oil-containing waste emulsion commonly used in the prior art mainly comprises a salting-out method, a flocculation method, a direct evaporation method and the like. However, the waste emulsion treatment methods not only have the disadvantages of more residues, non-ideal effect, complex operation and the like, but also consume a large amount of human funds.
In order to solve the defects and the shortcomings of the waste emulsion treatment method, the method for efficiently and resourcefully treating the waste emulsion generated by nonferrous metal processing enterprises is developed, and the method has good environmental protection and social benefits, thereby providing a novel waste emulsion treatment system.
Disclosure of Invention
The invention aims to solve the problems in the prior art, not only has the defects of more residues, unsatisfactory effect, complex operation and the like when the waste emulsion is treated, but also consumes a large amount of human funds, and provides a novel waste emulsion treatment system. A novel old and useless emulsion processing system adopts earlier to realize oil-water separation, then step by step, the mode of the aquatic COD of degree of depth degradation, finally reaches waste water resource utilization or discharge requirement, can effective processing old and useless emulsion, saves a large amount of human funds.
In order to achieve the purpose, the invention adopts the following technical scheme: a novel treatment system for waste emulsion comprises a demulsification reactor, an intermediate water tank, a wet catalytic oxidation tower, an electrocatalytic oxidation tank, an inclined plate sedimentation tank, an ozone reactor, a medium filter and a water storage tank which are connected in sequence; the demulsification reactor is connected with a demulsifier dosing device, a separating agent dosing device, an oil-water depth separator and an intermediate water tank, a first water pump is arranged on one side of the oil-water separator and connected with the demulsification reactor through a pipeline, and an oil pump is arranged on the other side of the oil-water separator; the inclined plate sedimentation tank is connected with a PAC (programmable automation controller) dosing device and a PAM (pulse amplitude modulation) dosing device, the output end of the inclined plate sedimentation tank is connected with a sludge dewatering machine, the output end of the sludge dewatering machine is connected with a low-temperature sludge drying machine, one end of the ozone reactor is provided with an ozone generator, and the output end of the ozone reactor is connected with a medium filter through a pipeline.
Preferably, the demulsification reactor is internally provided with a rotary oil scraping device and a water draining device, the water draining device consists of a water pump and a valve, an oil separating plate is arranged in the middle of the demulsification reactor, and oil separated out by the oil separating plate is retained on one side of the rotary oil scraping device.
Preferably, a third water pump is arranged on one side of the sludge dewatering machine and is connected with the inclined plate sedimentation tank through a pipeline.
Preferably, a second water pump is arranged between the intermediate water tank and the wet catalytic oxidation tower.
Preferably, the reaction temperature of the wet catalytic oxidation tower is controlled at 270 ℃, and the pressure is controlled at 7.0 MPa.
Preferably, the polar plate of the electrocatalytic oxidation tank is a graphite polar plate, and the voltage is controlled to be 30-36V.
Preferably, an ozone catalyst filler is placed in the ozone reactor, and when COD (chemical oxygen demand) in water is 40-300mg/L, the volume ratio of the adding amount of the ozone catalyst to the water inflow is 1: 1.
Preferably, the adding amount of the ozone in the ozone reactor and the COD amount in the water are 1: 1.
Preferably, quartz sand filler is arranged in the medium filter, the thickness of the filler is 800mm, and the particle size of the filler is 0.6-1.2 mm.
Preferably, the oil-water depth separator is provided with a heat preservation device and a heat tracing device, the heat preservation device is heat preservation cotton arranged outside the oil-water depth separator, the heat tracing device is a steam coil arranged inside the oil-water depth separator, and the internal temperature is kept stable at 70 ℃.
Compared with the prior art, the invention has the beneficial effects that:
the novel treatment system for the waste emulsion can degrade COD (chemical oxygen demand) in water after the waste emulsion is separated from oil relatively thoroughly, and water treated by the novel treatment system for the waste emulsion can be discharged or recycled. The discharged water-containing sludge has obvious reduction effect after low-temperature drying treatment, and the sludge treatment cost of enterprises about waste emulsion systems can be reduced. Not only the effect is ideal, the residue is less, the operation is simple, but also a large amount of manpower fund is saved.
Drawings
FIG. 1 is a system configuration diagram of the present invention;
FIG. 2 is a process flow diagram of the present invention;
reference numbers in fig. 1:1 is an oil-water separator, 2 is an intermediate water tank, 3 is a wet catalytic oxidation tower, 4 is an electrocatalytic oxidation tank, 5 is an inclined plate sedimentation tank, 6 is an ozone reactor, 7 is a medium filter, 8 is a water storage tank, 9 is an oil-water deep separator, 10 is a sludge dewatering machine, 11 is a low-temperature sludge drying machine, 12 is an ozone generator, 13 is a demulsifier dosing device, 14 is a separating agent dosing device, 15 is a PAC dosing device, 16 is a PAM dosing device, 17 is a first water pump, 18 is an oil pump, 19 is a second water pump, 20 is a third water pump, 21 is a fourth water pump, and 22 is a fifth water pump.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments of the present application, such as several changes and modifications, are within the scope of the present invention.
In combination with fig. 1 of the present application, the present invention provides a technical scheme of a novel waste emulsion treatment system: the utility model provides a novel old and useless emulsion processing system, mainly includes, breakdown of emulsion reactor 1, middle pond 2, wet-type catalytic oxidation tower 3, electrocatalytic oxidation pond 4, inclined plate sedimentation tank 5, ozone reactor 6, medium filter 7, storage water tank 8, profit depth separator 9, sludge dewaterer 10, low temperature sludge drying machine 11, ozone generator 12, demulsifier charge device 13, separator charge device 14, PAC charge device 15, PAM charge device 16, first water pump 17, oil pump 18, second water pump 19, third water pump 20, fourth water pump 21, fifth water pump 22.
A novel waste emulsion treatment system is characterized in that a demulsifying reactor 1 is connected with a demulsifying agent dosing device 13, a separating agent dosing device 14, an oil-water deep separator 9 and an intermediate water tank 2. The demulsifier and the separating agent are added into the demulsification reactor 1 of the novel waste emulsion treatment system through a demulsifier dosing device 13 and a separating agent dosing device 14 of the novel waste emulsion treatment system, so that preliminary oil-water separation is realized. Set up rotatory frizing device, drainage device in the breakdown of emulsion reactor 1, drainage device comprises water pump and valve, is provided with the oil removal board in the middle of the breakdown of emulsion reactor 1, and the oil removal board separates breakdown of emulsion reactor 1 for breakdown of emulsion room and drainage chamber, and wherein, the indoor rotatory frizing device that sets up of breakdown of emulsion sets up drainage device in the drainage chamber, and drainage device comprises water pump and valve connection, and rotatory frizing device and drainage device are prior art. Because the height of the oil separation plate is less than that of the demulsification reactor, the demulsification chamber is communicated with the bottom of the drainage chamber, and oil separated from the demulsification chamber is blocked at one side of the rotary oil scraping device, namely, is positioned in the demulsification chamber. Under the action of the demulsifier and the separating agent, the primary separation of oil and water is realized, the separated oil is retained by the oil separating plate, the separated oil is conveyed to the oil-water deep separator 9 by the rotary oil scraping device, the separated water is discharged by the water pump and the valve of the water discharging device and automatically flows to the intermediate water tank 2 by the pipeline, the oil content of the water quality of the intermediate water tank 2 is controlled within 10mg/L, the COD is estimated to be 6000 plus 7000mg/L, and the part of the COD is mainly water-soluble reducing substances which are difficult to degrade. The demulsification reactor 1 is connected with the oil-water deep separator 9, a first water pump 17 is arranged on one side of the oil-water deep separator 9 and connected with the demulsification reactor 1 through a pipeline, and an oil pump 18 is arranged on the other side of the oil-water deep separator 9. The oil-water separator 9 is provided with a heat preservation device and a heat tracing device, the heat preservation device is heat preservation cotton arranged outside the oil-water depth separator 9, the heat tracing device is a steam coil arranged inside the oil-water depth separator 9, and the internal temperature is kept stable at 70 degrees. The oil which is obtained by the preliminary oil-water separation of the waste emulsion in the emulsion breaking reactor 1 is conveyed to an oil-water deep separator 9 for further deep oil-water separation, and water and oil are separated. The water deeply separated by the oil-water deep separator 9 is returned to the emulsion breaking reactor 1 through a first water pump 17. The oil deeply separated by the oil-water deep separator 9 is transported out through an oil pump 18.
The intermediate water tank 2 is connected with the wet catalytic oxidation tower 3, and a second water pump 19 is arranged between the intermediate water tank and the wet catalytic oxidation tower. The second water pump 19 conveys water preliminarily separated from oil and water in the demulsification reactor 1 stored in the intermediate water tank 2 to the wet catalytic oxidation tower 3. The wet catalytic oxidation tower 3 controls the reaction temperature at 270 ℃ and the pressure at 7.0mpa, and the COD which is difficult to degrade is firstly degraded under the conditions of high temperature and high pressure, so that the COD in the water is degraded to about 500 mg/L. The wet catalytic oxidation tower 3 is connected with the electrocatalytic oxidation tank 4, and wastewater degraded by COD in the wet catalytic oxidation tower 3 is conveyed into the electrocatalytic oxidation tank 4 of a novel waste emulsion treatment system through a pipeline. The electrode plate of the electrocatalytic oxidation tank 4 adopts a graphite electrode, the voltage is 30-36V, and the part of COD which is difficult to degrade in water is continuously degraded through electrocatalytic oxidation, so that the COD in the discharged water is further about 200 mg/L.
The electrocatalytic oxidation tank 4 is communicated with the inclined plate sedimentation tank 5, and the inclined plate sedimentation tank 5 is connected with a PAC dosing device 15 and a PAM dosing device 16. The output end of the inclined plate sedimentation tank 5 is connected with a sludge dewatering machine 10, the output end of the sludge dewatering machine 10 is connected with a low-temperature sludge drying machine 11, and a third water pump 20 is arranged on one side of the sludge dewatering machine 10 and is connected with the inclined plate sedimentation tank 5 through a pipeline. PAC with the density of 2mg/L and PAM with the density of 1mg/L are added into the inclined plate sedimentation tank 5 to remove suspended matters in water generated by electrolysis, and sludge deposited at the bottom is periodically discharged into the sludge dewatering machine 10. The water content of the dewatered sludge reaches about 80 percent, the dewatered sludge is conveyed into a low-temperature sludge dryer 11, and the dewatered water is conveyed to a water inlet of an inclined plate sedimentation tank 5 through a third water pump 20. The low-temperature sludge dryer 11 can reduce the water content in the sludge to about 10% through sludge drying treatment, reduce the weight of the sludge needing to be transported outside by about 70%, greatly reduce the sludge treatment cost and save a large amount of manpower funds. The inclined plate sedimentation tank 5 is connected with an ozone reactor 6, and an ozone generator 12 is arranged at one end of the ozone reactor 6. Can remove the odor and the chroma in the water and can continuously degrade a small amount of residual COD, the COD of the effluent reaches about 50mg/L, and the requirement of discharge or recycling is preliminarily met. An ozone catalyst filler is placed in the ozone catalytic oxidation 6, and when COD (chemical oxygen demand) in water is 40-300mg/L, the volume ratio of the adding amount of the ozone catalyst to the water inflow is 1: 1. The amount of ozone added and the amount of COD in the water in the ozone reactor 6 are 1:1, and the unit is mg/L. The output end of the ozone reactor 6 is connected with the medium filter 7 through a pipeline, and a fourth water pump 21 is arranged between the output end and the medium filter. The medium filter 7 can deeply remove suspended matters and colloid in water and part of COD which is difficult to degrade, further improve the quality of the discharged water and meet the requirements of water recycling or discharge. The medium filter 7 is internally provided with a quartz sand filler, the thickness of the filler is 800mm, and the particle size of the filler is 0.6-1.2 mm. The medium filter 7 is connected with the water storage tank 8 through a pipeline, and water in the water storage tank 8 is conveyed to an external drainage system or a reuse water system through a fifth water pump 22.
The working process of the invention is as follows: when the novel waste emulsion treatment system works normally, waste emulsion enters the demulsification reactor 1, a demulsifier is added into the demulsification reactor 1 through a demulsifier dosing device 13, and a separating agent is added into the demulsification reactor 1 through a separating agent dosing device 14. In the demulsification reactor 1, the waste emulsion is subjected to preliminary oil-water separation under the action of a demulsifier and a separating agent. The demulsification reactor 1 is internally provided with a rotary oil scraping device and a water discharging device, and the middle of the demulsification reactor 1 is provided with an oil separating plate, so that oil primarily separated from oil water is retained on one side of the oil scraping device. Waste emulsion carries out the water oil preliminary separation through emulsion breaking reactor 1, detains the oil of water oil preliminary separation back through the baffle, carries the oil water deep separator 9 with the oil water preliminary separation through rotatory oil extraction device in, and water pump and the valve of drainage device are with the water of water oil preliminary separation through the pipeline from flowing to middle pond 2. The petroleum content of the water in the intermediate water tank 2 is controlled within 10mg/L, the COD is estimated to be 6000-7000mg/L, and the COD in the intermediate water tank 2 is mainly refractory water-soluble reducing substances. The oil water depth separator 9 further deeply separates the oil primarily separated from the oil water, the deeply separated water is conveyed to the middle water pool 2 through the first water pump 17, and the deeply separated oil is output through the oil pump 18. The oil-water depth separator 9 can adopt 'a novel oil-water separator' of patent number ZL 2019221116576, and oil-water depth separator 9 sets up heat preservation device and companion heat facility, and heat preservation device is for setting up at the outside heat preservation cotton of oil-water depth separator 9, and companion heat facility keeps inside temperature stable at 70 degrees for setting up at the inside steam coil pipe of oil-water depth separator 9. The water of the preliminary oil-water separation stored in the middle water tank 2 is conveyed to the wet catalytic oxidation tower 3 through the second water pump 19, the reaction temperature of the wet catalytic oxidation tower 3 is controlled at 270 ℃, the pressure of the wet catalytic oxidation tower 3 is controlled at 7.0MPa, and the COD which is difficult to degrade is degraded under the conditions of high temperature and high pressure, so that the COD in the water is degraded to about 500 mg/L. The water degraded by the wet catalytic oxidation tower 3 is conveyed into the electrocatalytic oxidation tank 4 through a pipeline, a graphite electrode plate is selected as a polar plate of the electrocatalytic oxidation tank 4, the voltage is controlled to be 30-36V, and the COD which is difficult to degrade in the water is continuously degraded through the electrocatalytic oxidation, so that the COD in the discharged water is further about 200 mg/L. The effluent of the electrocatalytic oxidation tank 4 enters an inclined plate sedimentation tank 5, PAC with the density of 2mg/L and PAM with the density of 1mg/L are added into the inclined plate sedimentation tank 5 through a PAC dosing device 15 and a PAM dosing device 16, suspended matters generated by electrolysis in water are removed, and sludge deposited at the bottom is periodically discharged into a sludge dewatering machine 10. The water content of the dewatered sludge reaches about 80 percent, the dewatered sludge is conveyed into a low-temperature sludge dryer 11, and the dewatered water is conveyed to a water inlet of an inclined plate sedimentation tank 5 through a third water pump 20. The low-temperature sludge dryer 11 can reduce the water content in the sludge to about 10% through sludge drying treatment, reduce the weight of the sludge needing to be transported outside by about 70%, greatly reduce the sludge treatment cost and save a large amount of manpower funds.
The water treated by the inclined plate sedimentation tank 5 automatically flows to the ozone reactor 6 through a pipeline, so that the odor and the chroma in the water can be removed, the residual COD can be continuously degraded, the COD of the effluent water reaches about 50mg/L, and the volume ratio of the adding amount of the ozone catalyst to the water inflow in the ozone reactor 6 which can initially meet the requirement of being discharged or recycled is 1: 1. The effluent of the ozone reactor 6 is conveyed into the medium filter 7 through the fourth water pump 21, suspended matters and colloid in the water and part of COD which is difficult to degrade are removed deeply, the quality of the discharged water is further improved, and the requirement of water recycling or discharge is met. The medium filter 7 is internally provided with quartz sand filler, the thickness of the filler is 800mm, and the particle size of the filler is 0.6-1.2 mm. The water from the medium filter 7 flows automatically to the water storage tank 8 through a water pipe, and the water in the water storage tank 8 is conveyed to an external drainage system or a reuse water system through a fifth water pump 22.
The novel treatment system for the waste emulsion can degrade COD (chemical oxygen demand) in water after the waste emulsion is separated from oil relatively thoroughly, and water treated by the novel treatment system for the waste emulsion can be discharged or recycled. The discharged water-containing sludge has obvious reduction effect after low-temperature drying treatment, and the sludge treatment cost of enterprises about waste emulsion systems can be reduced. Not only the effect is ideal, the residue is less, the operation is simple, but also a large amount of manpower fund is saved.
The invention has been described in connection with the preferred embodiments illustrated in the drawings and described above, and it should be understood that various changes, substitutions, and alterations can be made without departing from the overall spirit of the invention.
Claims (10)
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| CN115149138A (en) * | 2022-08-05 | 2022-10-04 | 西安交通大学 | A device and method for dismantling and recycling waste lithium batteries |
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| EP3686263A1 (en) * | 2019-01-26 | 2020-07-29 | Cangzhou Xinchang Chemical Corporation | Slop oil treating device |
| CN214299653U (en) * | 2020-10-15 | 2021-09-28 | 郑州恒博环境科技股份有限公司 | Novel processing system of old and useless emulsion |
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| WO2017067161A1 (en) * | 2015-10-20 | 2017-04-27 | 波鹰(厦门)科技有限公司 | Treatment device and method for oil extraction wastewater |
| EP3686263A1 (en) * | 2019-01-26 | 2020-07-29 | Cangzhou Xinchang Chemical Corporation | Slop oil treating device |
| CN110981107A (en) * | 2019-12-25 | 2020-04-10 | 武汉钢铁有限公司 | Silicon steel oil-containing and emulsion wastewater treatment and recycling system and process thereof |
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