CN112194290A - Physicochemical treatment system and method for cosmetic production waste liquid - Google Patents
Physicochemical treatment system and method for cosmetic production waste liquid Download PDFInfo
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- CN112194290A CN112194290A CN202010621606.2A CN202010621606A CN112194290A CN 112194290 A CN112194290 A CN 112194290A CN 202010621606 A CN202010621606 A CN 202010621606A CN 112194290 A CN112194290 A CN 112194290A
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- 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
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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
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
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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
- C02F1/465—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electroflotation
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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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F2001/46133—Electrodes characterised by the 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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
Abstract
The invention discloses a system and a method for physicochemical treatment of cosmetic production waste liquid, wherein the system comprises a waste liquid adjusting tank, an electrolytic cell, a pH adjusting tank, a coagulation tank, a concentration tank, a DMF (dimethyl formamide) membrane device, a sludge pump and a filter press which are sequentially communicated; and after the electrolytic cell is treated, the liquid obtained by filtering the waste liquid by the DMF membrane device flows into a clean water tank, and the waste liquid which does not pass through the DMF membrane device flows back into the concentration tank. The physicochemical treatment method of the cosmetic production waste liquid by the cosmetic production waste liquid physicochemical treatment system comprises the following steps: adjusting waste liquid; electrolyzing the waste liquid; adjusting the pH value; adding a coagulant; filtering and concentrating; and (5) sludge press filtration and the like. The system and the method are utilized, so that continuous treatment operation is realized, the treatment efficiency is high, the operation cost is low, and SS, LAS, COD and other pollutants in the waste liquid are efficiently removed; the device can meet the limit requirement of land shortage on facility design space.
Description
Technical Field
The invention relates to the technical field of waste liquid treatment, in particular to a system and a method for physicochemical treatment of cosmetic production waste liquid.
Background
Along with the continuous improvement of income level and living standard of people, people's demand for cosmetics is more and more outstanding, and cosmetics consumption lasts to a great extent increase, and the ecosystem of water will seriously be influenced to the waste liquid that its production process discharged gets into natural water. Along with the increasing environmental awareness of people and other reasons, water pollution treatment in the cosmetic industry is gradually paid attention.
The cosmetic products include skin caring products (such as facial mask, skin caring products), cleaning solution, shampoo, bath lotion, hair caring products, etc. The production raw materials are as follows: vegetable oils, waxes, hydrocarbons, synthetic oils and fats, fatty acids, fatty alcohols and fats, etc., and further contains emulsifiers, thickeners, antioxidants, antiseptics and essence pigments, surfactants (LAS) such as sodium dodecylbenzene sulfonate, sodium laureth sulfate, etc.
The main sources of the waste liquid of the cosmetics are as follows: 1) and (5) cleaning the waste liquid. Such as washing water in the refining process of products or intermediate products, washing water, bottle washing water and the like of reaction equipment or reaction kettles for replacing products or carrying out batch reaction, and the main components are raw materials, products, intermediate products, byproducts and the like. 2) And (4) draining process water in the production and processing process of the product. The waste liquid formed in the production process comprises: distillation residue, crystallization mother liquor, filtration mother liquor and the like.
The cosmetic waste liquid/waste water belongs to high-concentration organic waste liquid which is difficult to treat, and is characterized in that: 1) the waste water quantity is small, and the water quality fluctuation is large. Due to the characteristics of fine, batch and small-scale production of cosmetics, the product is replaced and intermittently produced, the drainage time is concentrated, and the fluctuation range of the quality of the discharged waste liquid is large. 2) The concentration of contaminants is high and the biodegradability is poor. The waste liquid has the characteristics of higher COD, BOD, SS, LAS and the like, but the BOD/COD value is lower, which indicates that the organic pollutants in the waste liquid belong to the substances which are difficult to biodegrade. 3) The waste liquid has complex components and contains toxic and harmful substances. Due to the wide variety of cosmetics, more raw materials are needed for each product, and the waste liquid components are complex. 4) The waste liquid has high emulsification degree. Due to the particularity and the requirement of the product, the waste liquid contains an emulsifier, a thickening agent, grease and the like, so that the waste liquid is highly emulsified. The physical and chemical treatment technology in the wastewater treatment is very important.
At present, in the prior art, the physicochemical treatment process in the treatment of the waste liquid from the production of cosmetics comprises emulsion breaking of emulsion, LAS removal and the like, a large amount of demulsifier and coagulant/flocculant combination are required to be added for emulsion breaking, and because the water quality fluctuation range is large, the automatic control of the agent addition is difficult to realize, the emulsion breaking effect is poor, the effluent is turbid, the pollutant removal efficiency is not high, the demulsifier is expensive, the operation cost of chemicals is high, the amount of generated sludge is large, part of treatment devices occupy large area, and continuous treatment operation cannot be realized.
Disclosure of Invention
In order to overcome the above disadvantages, the present invention provides a system and a method for materializing and treating a waste liquid from cosmetic production, which are capable of continuous treatment.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a cosmetic production waste liquid physicochemical treatment system comprises a waste liquid adjusting tank, an electrolytic cell, a pH adjusting tank, a coagulation tank, a concentration tank, a DMF membrane device, a sludge pump and a filter press which are sequentially communicated; the waste liquid adjusting tank is externally connected with inlet water and is used for carrying out uniform and homogeneous adjustment treatment on the waste liquid; the electrolytic cell is used for carrying out electrolysis and/or electric flocculation and/or electric air flotation treatment on the waste liquid flowing from the waste liquid adjusting tank and adding conductive salt; the pH adjusting tank is used for adjusting the pH of the waste liquid flowing from the electrolytic tank; the coagulation tank is used for adding an inorganic coagulant into the waste liquid flowing from the pH adjusting tank; the concentration tank is used for concentrating waste liquid flowing from the coagulation tank; the DMF membrane device is used for carrying out circulating filtration and concentration treatment on waste liquid flowing from the concentration tank, the liquid of the waste liquid filtered by the DMF membrane device flows into the clean water tank, and concentrated liquid which does not pass through the DMF membrane device flows back into the concentration tank; the sludge pump pumps sludge deposited at the bottom of the concentration tank to the filter press, and the filter press is used for carrying out filter pressing treatment on the sludge.
Furthermore, be equipped with cosmetics waste liquid in the waste liquid equalizing basin and arrange the mouth, the bottom of waste liquid equalizing basin is equipped with equalizing basin aeration pipeline subassembly, be equipped with the waste liquid passageway that flows to the electrolytic bath between waste liquid equalizing basin and the electrolytic bath.
Furthermore, a plurality of electrode plates are arranged in the electrolytic cell, each electrode plate comprises an anode plate and a cathode plate, the anode plates and the cathode plates are connected with a rectification power supply, the electrode plates are aluminum/iron plates, the electrode plates are distributed in the electrolytic cell, a plurality of waste liquid through holes are distributed on the surface of each electrode plate, and two ends of each electrode plate are vertically inserted into a left side wall slot and a right side wall slot in the electrolytic cell; an electrolytic tank aeration pipeline assembly is arranged at the bottom of the electrolytic tank, and a waste liquid channel flowing to the pH adjusting tank is arranged between the pH adjusting tank and the electrolytic tank; still add the device including conductive salt, conductive salt adds the device and adds pipeline and conductive salt flow valve including conductive salt, and the income liquid mouth that conductive salt added the jar is connected with water pipe, and conductive salt adds the conductive salt liquid discharge port that the jar was added to conductive salt and adds pipeline and electrolytic bath intercommunication through conductive salt, conductive salt flow valve establishes on conductive salt adds the pipeline.
Further, a pH adjusting tank aeration pipeline assembly is arranged at the bottom of the pH adjusting tank, and a waste liquid channel flowing to the coagulation tank is arranged between the pH adjusting tank and the coagulation tank; still include alkaline agent and add the device, alkaline agent adds the device and includes alkaline agent and adds jar, alkaline agent and add pipeline and alkaline agent flow valve, and the income liquid mouth and the water piping connection of alkaline agent interpolation jar, alkaline agent liquid discharge port that alkaline agent added the jar are passed through alkaline agent and are added pipeline and pH adjusting tank intercommunication, alkaline agent flow valve establishes on alkaline agent adds the pipeline.
Furthermore, an electric stirring device is arranged in the coagulation tank, and a waste liquid channel flowing to the concentration tank is arranged between the concentration tank and the coagulation tank; the system also comprises a coagulant adding device, wherein the coagulant adding device comprises a coagulant adding tank, a coagulant adding pipeline and a coagulant flow valve, a liquid inlet of the coagulant adding tank is connected with a tap water pipe, a coagulant liquid outlet of the coagulant adding tank is communicated with the coagulation tank through the coagulant adding pipeline, and the coagulant flow valve is arranged on the coagulant adding pipeline.
Furthermore, the DMF membrane device comprises a liquid pumping pipeline, a liquid pumping pump, a plurality of DMF membrane filters, a concentrated liquid return pipeline and a clean water pipeline, wherein one end of the liquid pumping pipeline extends into the concentration tank, the other end of the liquid pumping pipeline is connected with waste liquid inlet ports of the plurality of DMF membrane filters connected in parallel, the liquid pumping pump is arranged on the liquid pumping pipeline, clean water outlet ports of the plurality of DMF membrane filters are connected in parallel and then connected with one end of the clean water pipeline, the other end of the clean water pipeline is communicated with the clean water tank, concentrated liquid outlet ports of the plurality of DMF membrane filters are connected in parallel and then connected with one end of the concentrated liquid return pipeline, and the other end of the concentrated liquid return pipeline extends into the concentration tank; the filter membrane in the DMF membrane filter is a microfiltration membrane with the diameter of 0.1-1 mu m. Can filter suspended particles in the waste liquid after demulsification, has relatively large membrane aperture and is not easy to block. The flow velocity in the DMF membrane device is 3-5 m/s, so that dirt accumulated on the surface of the membrane can be washed away, the blocking probability is reduced, and solid-liquid separation is achieved.
Furthermore, the adjusting tank aeration pipeline assembly, the electrolytic tank aeration pipeline assembly and the pH adjusting tank aeration pipeline assembly are respectively connected with one end of a main pipeline through three branch pipelines, and the other end of the main pipeline is connected with an air blower; and control valves are arranged on the three branch pipelines.
The device further comprises a backwashing pump, a valve A, a valve B, a valve C and a valve D, wherein the backwashing pump is connected with the liquid pump in parallel, the valve A and the valve B are respectively arranged at the inlet end and the outlet end of the backwashing pump, and the valve C and the valve D are respectively arranged at the inlet end and the outlet end of the liquid pump; and the clear water used for carrying out back flush treatment on the DMF membrane filter is the clear water of the clear water tank.
Furthermore, the bottom of the concentration tank is of a cone hopper structure, one end of the sludge pumping pipeline extends into the bottom of the concentration tank, the other end of the sludge pumping pipeline is communicated with the filter press, and the sludge pump is arranged on the sludge pumping pipeline.
A physicochemical treatment method of cosmetic production waste liquid comprises the following steps:
waste liquid adjustment: discharging the cosmetic waste liquid into a waste liquid regulating tank, carrying out aeration stirring on an aeration pipeline assembly of the regulating tank, carrying out uniform homogenizing regulation treatment on the waste liquid, and enabling the waste liquid after the uniform homogenizing regulation treatment to flow into an electrolytic tank;
waste liquid electrolysis: the electrolysis condition of the electrolytic cell is 0.1-30V and 0.1-50A, a rectification power supply applies periodic exchange current, the electrolysis time is 10-30 min, meanwhile, conductive salt is added according to the amount of 0-3 kg per ton of water, a conductive salt flow valve is opened, a conductive salt adding tank adds the conductive salt into the electrolytic cell through a conductive salt adding pipeline, the conductive salt is inorganic salt to enhance the conductivity of the waste liquid, under the action of certain voltage electrolysis, a series of complex actions of electric flocculation and electric air flotation are simultaneously generated, and pollutants in the waste liquid such as LAS, vegetable oil and macromolecular organic substances are subjected to redox reaction on the surface of an electrode; an aeration device in the electrolytic tank continuously washes the electrode plate to reduce the adhesion of generated pollutants to the electrode plate, and scum and sediment generated by reaction flow into a pH adjusting tank;
and (3) pH adjustment: opening an alkaline agent flow valve, adding an alkaline agent into the pH adjusting tank through an alkaline agent adding pipeline by the alkaline agent adding tank, keeping the pH value of liquid in the pH adjusting tank at 7-10, continuously aerating the pH adjusting tank for 10-20 min by an aeration pipeline assembly of the pH adjusting tank, and discharging the waste liquid into a coagulation tank;
adding a coagulant: adding a coagulant in an amount of 50-500 g per ton of water under the stirring of an electric stirring device, stirring for 10-20 min, and discharging the waste liquid into a concentration tank;
and (3) filtering and concentrating: under the action of a liquid pumping pump, feeding the upper-layer waste liquid in the concentration tank into a DMF (dimethyl formamide) membrane filter through a liquid pumping pipeline, enabling water passing through a filter membrane of the DMF membrane filter to flow into a clear water tank, and enabling concentrated liquid which cannot pass through the DMF membrane filter to flow back into the concentration tank through a concentrated liquid return pipeline;
sludge press filtration: under the action of a sludge pump, pumping sludge deposited at the bottom of the coagulation tank to a filter press through a sludge pumping pipeline, wherein the filter press is used for carrying out filter pressing treatment on the sludge;
and (3) regular dosing backwashing: and starting the backwashing pump at regular intervals, and performing online backwashing treatment on the DMF membrane filter by using the clean water stored in the clean water tank and adding medicines.
The invention has the beneficial effects that:
this patent is through sending into cosmetics waste liquid materialization processing system with the waste liquid, and a series of processing links such as waste liquid equalizing basin, electrolytic bath, coagulation pond, concentrated pond, DMF membrane device and clean water basin that the waste liquid communicates in proper order, and cosmetics waste liquid can break emulsion completely and handle, and pollutants such as SS, LAS, COD in the waste liquid obtain efficient the getting rid of, and the waste liquid is clear transparent after the processing. The problems of large dosage of demulsifying/coagulating agent, difficult stable control of demulsifying effect, turbid effluent, low pollutant removal efficiency, high operating chemical charge and the like in the conventional physicochemical treatment process are solved.
Compared with the prior art, the invention has the beneficial effects that the treatment efficiency is high and the operation cost is low by carrying out continuous treatment operation on the cosmetic waste liquid.
In addition, the miniaturization and the complete set of the equipment realize the minimum change on the basis of the existing infrastructure, and can meet the limit requirement of land shortage on facility design space.
Drawings
The invention is further described with the aid of the accompanying drawings, in which the embodiments do not constitute any limitation, and for a person skilled in the art, without inventive effort, further drawings may be obtained from the following figures:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the electrode plate shown in FIG. 1;
fig. 3 is a side view of fig. 2.
In the figure: 1. a waste liquid adjusting tank; 2. an electrolytic cell; 3. A pH adjusting tank; 4. A coagulation tank; 5. a concentration tank; 6. A DMF membrane device; 7. a sludge pump; 8. a filter press; 9. a clean water tank; 10. discharging cosmetic waste liquid; 11. a regulating tank aeration pipeline component; 12. a waste liquid channel flowing to the electrolytic cell; 13. an electrode plate; 14. a rectified power supply; 15. an electrolytic cell aeration line assembly; 16. a waste liquid channel flowing to the pH adjusting tank; 17. a conductive salt addition tank; 18. a conductive salt addition line; 19. a conductive salt flow valve; 20. a tap water pipe; 21. a pH adjusting tank aeration pipeline component; 22. a waste liquid channel flowing to the coagulation tank; 23. an alkaline agent addition tank; 24. an alkaline agent addition pipeline; 25. an alkaline flow valve; 26. an electric stirring device; 27. a waste liquid channel flowing to the concentration tank; 28. a coagulant addition tank; 29. A coagulant addition pipeline; 30. a coagulant flow valve; 31. a liquid pumping pipeline; 32. a liquid pump; 33. a DMF membrane filter; 34. a concentrate return line; 35. a clear water pipeline; 36. a branch line; 37. a main pipeline; 38. a blower; 39. a control valve; 40. a backwash pump; 41. a valve A; 42. A valve B; 43. a valve C; 44. a valve D; 45. a sludge pumping pipeline; 46. a left sidewall slot; 47. a right sidewall slot; 48. waste liquid through holes; 49. an aeration pipeline assembly; 50. a clean water outlet.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and specific embodiments, and it is to be noted that the embodiments and features of the embodiments of the present application can be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper surface", "lower surface", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "forward", "reverse", "axial", "radial", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
As shown in fig. 1, a system for physicochemical treatment of cosmetic production waste liquid comprises a waste liquid adjusting tank 1, an electrolytic tank 2, a pH adjusting tank 3, a coagulation tank 4, a concentration tank 5, a DMF membrane device 6, a sludge pump 7 and a filter press 8 which are sequentially communicated; the waste liquid adjusting tank 1 is externally connected with inlet water and is used for carrying out uniform and homogeneous adjustment treatment on waste liquid; the electrolytic cell 2 is used for carrying out electrolysis and/or electric flocculation and/or electric air flotation treatment on the waste liquid flowing from the waste liquid adjusting tank and adding conductive salt; the pH adjusting tank 3 is used for adjusting the pH of the waste liquid flowing from the electrolytic cell; the coagulation tank 4 is used for adding an inorganic coagulant to the waste liquid flowing from the pH adjusting tank; the concentration tank 5 is used for precipitating waste liquid flowing from the coagulation tank; the DMF membrane device 6 is used for performing circulating filtration and concentration treatment on waste liquid flowing from the concentration tank, the liquid of the waste liquid filtered by the DMF membrane device 7 flows into the clean water tank 9, and concentrated liquid which does not pass through the DMF membrane device flows back into the concentration tank; the sludge pump 7 pumps the sludge deposited at the bottom of the concentration tank 5 to the filter press 8, and the filter press 8 is used for carrying out filter pressing treatment on the sludge.
Specifically, a cosmetic waste liquid discharge port 10 is arranged in the waste liquid adjusting tank 1, an adjusting tank aeration pipeline assembly 11 is arranged at the bottom of the waste liquid adjusting tank 1, and a waste liquid channel 12 flowing to an electrolytic tank is arranged between the waste liquid adjusting tank 1 and the electrolytic tank 2.
As shown in fig. 1, 2 and 3, a plurality of electrode plates 13 are arranged in the electrolytic cell 2, the electrode plates include an anode plate and a cathode plate, the anode plate and the cathode plate are connected with the rectification power supply 14, the electrode plates 13 are made of aluminum/iron plates, the plurality of electrode plates 13 are distributed in the electrolytic cell 2, a plurality of waste liquid through holes 48 are distributed on the surface of the electrode plates 13, and two ends of the electrode plates 13 are vertically inserted into a left side wall slot 46 and a right side wall slot 47 in the electrolytic cell 2; an electrolytic tank aeration pipeline assembly 15 is arranged at the bottom of the electrolytic tank 2, and a waste liquid channel 16 flowing to the pH adjusting tank is arranged between the pH adjusting tank 3 and the electrolytic tank 2; the electrolytic cell is characterized by further comprising a conductive salt adding device, wherein the conductive salt adding device comprises a conductive salt adding tank 17, a conductive salt adding pipeline 18 and a conductive salt flow valve 19, a liquid inlet of the conductive salt adding tank 17 is connected with a tap water pipe 20, a conductive salt liquid outlet of the conductive salt adding tank 17 is communicated with the electrolytic cell 2 through the conductive salt adding pipeline 18, and the conductive salt flow valve 19 is arranged on the conductive salt adding pipeline 18.
A pH adjusting tank aeration pipeline component 21 is arranged at the bottom of the pH adjusting tank 3, and a waste liquid channel 22 flowing to the coagulation tank is arranged between the pH adjusting tank 3 and the coagulation tank 4; the alkaline agent adding device comprises an alkaline agent adding tank 23, an alkaline agent adding pipeline 24 and an alkaline agent flow valve 25, a liquid inlet of the alkaline agent adding tank 23 is connected with the tap water pipe 20, an alkaline agent liquid outlet of the alkaline agent adding tank 23 is communicated with the pH adjusting tank 3 through the alkaline agent adding pipeline 24, and the alkaline agent flow valve 25 is arranged on the alkaline agent adding pipeline 24.
An electric stirring device 26 is arranged in the coagulation tank 4, and a waste liquid channel 27 flowing to the concentration tank is arranged between the concentration tank 5 and the coagulation tank 4; the system also comprises a coagulant adding device, wherein the coagulant adding device comprises a coagulant adding tank 28, a coagulant adding pipeline 29 and a coagulant flow valve 30, a liquid inlet of the coagulant adding tank 28 is connected with the tap water pipe 20, a coagulant liquid outlet of the coagulant adding tank 28 is communicated with the coagulation tank 4 through the coagulant adding pipeline 29, and the coagulant flow valve 30 is arranged on the coagulant adding pipeline 29.
The DMF membrane device 6 comprises a liquid pumping pipeline 31, a liquid pumping pump 32, a plurality of DMF membrane filters 33, a concentrated liquid return pipeline 34 and a clean water pipeline 35, wherein one end of the liquid pumping pipeline 31 extends into the concentration tank 5, the other end of the liquid pumping pipeline 31 is connected with waste liquid inlet ports of the plurality of DMF membrane filters 33 which are connected in parallel, the liquid pumping pump 32 is arranged on the liquid pumping pipeline 31, clean water outlet ports of the plurality of DMF membrane filters 33 are connected with one end of the clean water pipeline 35 after being connected in parallel, the other end of the clean water pipeline 35 is communicated with the clean water tank 9, concentrated liquid outlet ports of the plurality of DMF membrane filters are connected with one end of the concentrated liquid return pipeline 34 after being connected in parallel, and the other end of the concentrated liquid return pipeline 34 extends into the concentration tank 5. The filter membrane in the DMF membrane filter is a microfiltration membrane with the diameter of 0.1-1 mu m. Can filter suspended particles in the waste liquid after demulsification, has relatively large membrane aperture and is not easy to block. The flow velocity in the DMF membrane device is 3-5 m/s, so that dirt accumulated on the surface of the membrane can be washed away, the blocking probability is reduced, and solid-liquid separation is achieved.
In this patent, the adjusting tank aeration line module 11, the electrolytic tank aeration line module 15, and the pH adjusting tank aeration line module 21 are connected to one end of a main line 37 through three branch lines 36, respectively, the other end of the main line 37 is connected to a blower 38, and the three branch lines 36 are provided with control valves 39.
The device also comprises a backwash pump 40, a valve A41, a valve B42, a valve C43 and a valve D44, wherein the backwash pump 40 is connected with the liquid pump 32 in parallel, the valve A41 and the valve B42 are respectively arranged at the inlet end and the outlet end of the backwash pump 40, and the valve C43 and the valve D44 are respectively arranged at the inlet end and the outlet end of the liquid pump 32; the clean water used for carrying out the back flushing treatment on the DMF membrane filter 33 is the clean water of the clean water tank 9, and a clean water outlet 50 is arranged on the clean water tank 9.
The bottom of the concentration tank 5 is of a cone hopper structure, one end of a sludge pumping pipeline 45 extends into the bottom of the concentration tank 5, the other end of the sludge pumping pipeline 45 is communicated with a filter press 8, and a sludge pump 7 is arranged on the sludge pumping pipeline 45.
A physicochemical treatment method of cosmetic production waste liquid comprises the following steps:
waste liquid adjustment: discharging the cosmetic waste liquid into a waste liquid regulating tank, carrying out aeration stirring on an aeration pipeline assembly of the regulating tank, carrying out uniform homogenizing regulation treatment on the waste liquid, and enabling the waste liquid after the uniform homogenizing regulation treatment to flow into an electrolytic tank;
waste liquid electrolysis: the electrolysis condition of the electrolytic cell is 0.1-30V and 0.1-50A, a rectification power supply applies periodic exchange current, the electrolysis time is 10-30 min, meanwhile, conductive salt is added according to the amount of 0-3 kg per ton of water, a conductive salt flow valve is opened, a conductive salt adding tank adds the conductive salt into the electrolytic cell through a conductive salt adding pipeline, the conductive salt is inorganic salt to enhance the conductivity of the waste liquid, under the action of certain voltage electrolysis, a series of complex actions of electric flocculation and electric air flotation are simultaneously generated, and pollutants in the waste liquid such as LAS, vegetable oil and macromolecular organic substances are subjected to redox reaction on the surface of an electrode; an aeration device in the electrolytic tank continuously washes the electrode plate to reduce the adhesion of generated pollutants to the electrode plate, and scum and sediment generated by reaction flow into a pH adjusting tank;
and (3) pH adjustment: opening an alkaline agent flow valve, adding an alkaline agent into the pH adjusting tank through an alkaline agent adding pipeline by the alkaline agent adding tank, keeping the pH value of liquid in the pH adjusting tank at 7-10, continuously aerating the pH adjusting tank for 10-20 min by an aeration pipeline assembly of the pH adjusting tank, and discharging the waste liquid into a coagulation tank;
adding a coagulant: adding a coagulant in an amount of 50-500 g per ton of water under the stirring of an electric stirring device, stirring for 10-20 min, and discharging the waste liquid into a concentration tank;
and (3) filtering and concentrating: under the action of a liquid pumping pump, feeding the upper-layer waste liquid in the concentration tank into a DMF (dimethyl formamide) membrane filter through a liquid pumping pipeline, enabling water passing through a filter membrane of the DMF membrane filter to flow into a clear water tank, and enabling concentrated liquid which cannot pass through the DMF membrane filter to flow back into the concentration tank through a concentrated liquid return pipeline;
sludge press filtration: under the action of a sludge pump, pumping sludge deposited at the bottom of the coagulation tank to a filter press through a sludge pumping pipeline, wherein the filter press is used for carrying out filter pressing treatment on the sludge;
and (3) regular dosing backwashing: and starting the backwashing pump at regular intervals, and performing online backwashing treatment on the DMF membrane filter by using the clean water stored in the clean water tank and adding medicines.
The working principle is as follows: the method is mainly used for removing metal and organic matter pollution in industrial wastewater. The method for removing the pollutants is to carry out pretreatment by electrolysis and physical and chemical principles and finally filter and separate by a DMF membrane filter. Most metals are dissolved in an acidic solution, and the heavy metals can form hydroxide precipitates by adjusting the pH value of the wastewater. Each heavy metal ion has a PH of minimum solubility at which it will precipitate and separate from solution. After the PH adjustment of the medicament treatment, in order to improve the decomposition rate of heavy metal compounds and solution, a coagulant is generally added for coagulation treatment, and the treated mixed wastewater enters a DMF membrane system for filtration. The membrane filtration of the DMF membrane filter is driven by pressure, wastewater passes through membrane pores at a certain speed and generates clean water while performing high-speed cross flow, and particles or flocs larger than the pore size of the membrane pores are intercepted in the filtration process. This patent is through fine preliminary treatment, dissolves COD in the waste water, and pollutants such as LAS, COD can obtain effectual getting rid of, and the waste liquid is clear transparent after the processing. The problems of large dosage of demulsifying/coagulating agent, difficult stable control of demulsifying effect, turbid effluent, low pollutant removal efficiency, high operating chemical charge and the like in the conventional physicochemical treatment process are solved.
Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A cosmetic production waste liquid physicochemical treatment system comprises a waste liquid adjusting tank, an electrolytic cell, a pH adjusting tank, a coagulation tank, a concentration tank, a DMF membrane device, a sludge pump and a filter press which are sequentially communicated; the waste liquid adjusting tank is externally connected with inlet water and is used for carrying out uniform and homogeneous adjustment treatment on the waste liquid; the electrolytic cell is used for carrying out electrifying treatment on the waste liquid flowing from the waste liquid regulating tank and adding conductive salt; the pH adjusting tank is used for adjusting the pH of the waste liquid flowing from the electrolytic tank; the coagulation tank is used for adding an inorganic coagulant into the waste liquid flowing from the pH adjusting tank; the concentration tank is used for concentrating waste liquid flowing from the coagulation tank; the DMF membrane device is used for carrying out circulating filtration and concentration treatment on waste liquid flowing from the concentration tank, the liquid of the waste liquid filtered by the DMF membrane device flows into the clean water tank, and concentrated liquid which does not pass through the DMF membrane device flows back into the concentration tank; the sludge pump pumps sludge deposited at the bottom of the concentration tank to the filter press, and the filter press is used for carrying out filter pressing treatment on the sludge.
2. The system for materializing and treating cosmetic production waste liquid according to claim 1, characterized in that: the cosmetic waste liquid adjusting tank is characterized in that a cosmetic waste liquid discharging port is formed in the waste liquid adjusting tank, an adjusting tank aeration pipeline assembly is arranged at the bottom of the waste liquid adjusting tank, and a waste liquid channel flowing to the electrolytic tank is formed between the waste liquid adjusting tank and the electrolytic tank.
3. The system for materializing and treating cosmetic production waste liquid according to claim 2, characterized in that: the electrolytic cell is characterized in that a plurality of electrode plates are arranged in the electrolytic cell, each electrode plate comprises an anode plate and a cathode plate, the anode plates and the cathode plates are connected with a rectification power supply, the electrode plates are aluminum/iron plates, the plurality of electrode plates are distributed in the electrolytic cell, a plurality of waste liquid through holes are distributed on the surfaces of the electrode plates, and two ends of each electrode plate are vertically inserted into a left side wall slot and a right side wall slot in the electrolytic cell; an electrolytic tank aeration pipeline assembly is arranged at the bottom of the electrolytic tank, and a waste liquid channel flowing to the pH adjusting tank is arranged between the pH adjusting tank and the electrolytic tank; still add the device including conductive salt, conductive salt adds the device and adds pipeline and conductive salt flow valve including conductive salt, and the income liquid mouth that conductive salt added the jar is connected with water pipe, and conductive salt adds the conductive salt liquid discharge port that the jar was added to conductive salt and adds pipeline and electrolytic bath intercommunication through conductive salt, conductive salt flow valve establishes on conductive salt adds the pipeline.
4. The system for materializing and treating cosmetic production waste liquid according to claim 3, characterized in that: a pH adjusting tank aeration pipeline assembly is arranged at the bottom of the pH adjusting tank, and a waste liquid channel flowing to the coagulation tank is arranged between the pH adjusting tank and the coagulation tank; still include alkaline agent and add the device, alkaline agent adds the device and includes alkaline agent and adds jar, alkaline agent and add pipeline and alkaline agent flow valve, and the income liquid mouth and the water piping connection of alkaline agent interpolation jar, alkaline agent liquid discharge port that alkaline agent added the jar are passed through alkaline agent and are added pipeline and pH adjusting tank intercommunication, alkaline agent flow valve establishes on alkaline agent adds the pipeline.
5. The system for materializing and treating cosmetic production waste liquid according to claim 4, characterized in that: an electric stirring device is arranged in the coagulation tank, and a waste liquid channel flowing to the concentration tank is arranged between the concentration tank and the coagulation tank; the system also comprises a coagulant adding device, wherein the coagulant adding device comprises a coagulant adding tank, a coagulant adding pipeline and a coagulant flow valve, a liquid inlet of the coagulant adding tank is connected with a tap water pipe, a coagulant liquid outlet of the coagulant adding tank is communicated with the coagulation tank through the coagulant adding pipeline, and the coagulant flow valve is arranged on the coagulant adding pipeline.
6. The system for materializing and treating cosmetic production waste liquid according to claim 5, characterized in that: the DMF membrane device comprises a liquid pumping pipeline, a liquid pumping pump, a plurality of DMF membrane filters, a concentrated liquid return pipeline and a clear water pipeline, wherein one end of the liquid pumping pipeline extends into the concentration tank, the other end of the liquid pumping pipeline is connected with waste liquid inlet ports of the plurality of DMF membrane filters connected in parallel, the liquid pumping pump is arranged on the liquid pumping pipeline, clear water outlet ports of the plurality of DMF membrane filters are connected in parallel and then connected with one end of the clear water pipeline, the other end of the clear water pipeline is communicated with the clear water tank, concentrated liquid outlet ports of the plurality of DMF membrane filters are connected in parallel and then connected with one end of the concentrated liquid return pipeline, and the other end of the concentrated liquid return pipeline extends into the concentration tank; the filter membrane in the DMF membrane filter is a microfiltration membrane with the diameter of 0.1-1 mu m.
7. The system for materializing and treating cosmetic production waste liquid according to claim 6, characterized in that: the adjusting tank aeration pipeline assembly, the electrolytic tank aeration pipeline assembly and the pH adjusting tank aeration pipeline assembly are respectively connected with one end of a main pipeline through three branch pipelines, and the other end of the main pipeline is connected with a blower; and control valves are arranged on the three branch pipelines.
8. The system for materializing and treating cosmetic production waste liquid according to claim 7, characterized in that: the back washing pump is connected with the liquid pump in parallel, the valve A and the valve B are respectively arranged at the inlet end and the outlet end of the back washing pump, and the valve C and the valve D are respectively arranged at the inlet end and the outlet end of the liquid pump; and the clear water used for carrying out back flush treatment on the DMF membrane filter is the clear water of the clear water tank.
9. The system for materializing and treating cosmetic production waste liquid according to claim 8, characterized in that: the bottom of the concentration tank is of a cone hopper structure, one end of a sludge pumping pipeline extends into the bottom of the concentration tank, the other end of the sludge pumping pipeline is communicated with the filter press, and the sludge pump is arranged on the sludge pumping pipeline.
10. The method for materializing and treating the cosmetic production waste liquid by using the system for materializing and treating the cosmetic production waste liquid according to any one of claims 1 to 9, comprising the steps of:
waste liquid adjustment: discharging the cosmetic waste liquid into a waste liquid regulating tank, carrying out aeration stirring on an aeration pipeline assembly of the regulating tank, carrying out uniform homogenizing regulation treatment on the waste liquid, and enabling the waste liquid after the uniform homogenizing regulation treatment to flow into an electrolytic tank;
waste liquid electrolysis: the electrolysis condition of the electrolytic cell is 0.1-30V and 0.1-50A, a rectification power supply applies periodic exchange current, the electrolysis time is 10-30 min, meanwhile, conductive salt is added according to the amount of 0-3 kg per ton of water, a conductive salt flow valve is opened, a conductive salt adding tank adds the conductive salt into the electrolytic cell through a conductive salt adding pipeline, the conductive salt is inorganic salt to enhance the conductivity of the waste liquid, under the action of certain voltage electrolysis, a series of complex actions of electric flocculation and electric air flotation are simultaneously generated, and the oxidation-reduction reaction of pollutants in the waste liquid is generated on the surface of an electrode; an aeration device in the electrolytic tank continuously washes the electrode plate to reduce the adhesion of generated pollutants to the electrode plate, and scum and sediment generated by reaction flow into a pH adjusting tank;
and (3) pH adjustment: opening an alkaline agent flow valve, adding an alkaline agent into the pH adjusting tank through an alkaline agent adding pipeline by the alkaline agent adding tank, keeping the pH value of liquid in the pH adjusting tank at 7-10, continuously aerating the pH adjusting tank for 10-20 min by an aeration pipeline assembly of the pH adjusting tank, and discharging the waste liquid into a coagulation tank;
adding a coagulant: adding a coagulant in an amount of 50-500 g per ton of water under the stirring of an electric stirring device, stirring for 10-20 min, and discharging the waste liquid into a concentration tank;
and (3) filtering and concentrating: under the action of a liquid pumping pump, feeding the upper-layer waste liquid in the concentration tank into a DMF (dimethyl formamide) membrane filter through a liquid pumping pipeline, enabling water passing through a filter membrane of the DMF membrane filter to flow into a clear water tank, and enabling concentrated liquid which cannot pass through the DMF membrane filter to flow back into the concentration tank through a concentrated liquid return pipeline;
sludge press filtration: under the action of a sludge pump, pumping sludge deposited at the bottom of the coagulation tank to a filter press through a sludge pumping pipeline, wherein the filter press is used for carrying out filter pressing treatment on the sludge;
and (3) regular dosing backwashing: and starting the backwashing pump at regular intervals, and performing online backwashing treatment on the DMF membrane filter by using the clean water stored in the clean water tank and adding medicines.
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