CN217947906U

CN217947906U - Coating wastewater treatment system

Info

Publication number: CN217947906U
Application number: CN202221876147.3U
Authority: CN
Inventors: 王宏志
Original assignee: SHANGHAI YIKE GREEN ENGINEERING CO LTD
Current assignee: SHANGHAI YIKE GREEN ENGINEERING CO LTD
Priority date: 2022-07-19
Filing date: 2022-07-19
Publication date: 2022-12-02
Anticipated expiration: 2032-07-19

Abstract

The utility model provides a coating effluent disposal system, including adjusting homogenization pond, electric flocculation tank, anaerobism pond, good oxygen pond, sedimentation tank and ecological pool, the utility model discloses a coating effluent disposal system makes the processing of coating waste water through adjusting homogenization pond, electric flocculation tank, anaerobism pond, good oxygen pond, sedimentation tank and ecological pool to emission standard, just the utility model discloses a processing system investment is low, and is effectual, energy saving and consumption reduction simultaneously.

Description

Coating wastewater treatment system

Technical Field

The utility model belongs to the waste water treatment field especially relates to an application effluent disposal system.

Background

In recent years, with the rapid development of industries such as automobiles, motorcycles, household appliances and the like in China, the coating process is also rapidly developed correspondingly, and the application is more and more extensive. The application of the technologies in a large amount inevitably generates a large amount of harmful wastewater to pollute the environment. Coating wastewater, which is one of industrial wastewater, is mainly from pre-treatment processes of a vehicle body, such as pre-degreasing, surface conditioning, phosphating, filming, passivation and the like, and particularly, electrophoresis wastewater and painting wastewater therein have complex components, high concentration and poor biodegradability.

In addition, in the process of automobile coating production, paints with different colors need to be sprayed, and the spray gun and a pipeline for conveying the paints need to be cleaned by using an aqueous solvent between each color change, wherein the adopted aqueous solvent mainly comprises ethers such as ethylene glycol monobutyl ether, diethylene glycol monobutyl ether and ethylene glycol hexyl ether, and alcohols such as isopropanol, methanol and n-butanol. Because the components of the solvent are completely mutually soluble with water, the solvent is difficult to remove by adopting a physical-chemical coagulation method, the load and the energy consumption of biochemical treatment are greatly increased, and even the risk of overproof discharge is caused.

At present, coating wastewater treatment mainly adopts coagulation sedimentation, air flotation, biological contact oxidation and the like for treatment, but water quality change caused by process change has the problems of high load, large chemical agent amount, large energy consumption, increased emission risk and the like, so a reasonable and reliable coating wastewater treatment technology is urgently needed to solve the problems.

SUMMERY OF THE UTILITY MODEL

In view of the shortcoming of the prior art above, the utility model provides a coating wastewater treatment system to solve coating wastewater load that faces among the prior art high, chemical agent volume is big, the energy consumption is big, discharge risk increase scheduling problem.

To achieve the above and other related objects, the present invention provides an application wastewater treatment system, comprising:

the adjusting and homogenizing tank is communicated with a wastewater inlet pipeline;

the water inlet of the electric flocculation tank is communicated with the water outlet of the adjusting and homogenizing tank and is used for flocculating the adjusted and homogenized wastewater;

the water inlet of the anaerobic tank is communicated with the water outlet of the electric flocculation tank and is used for carrying out anaerobic treatment on flocculated wastewater;

the water inlet of the aerobic tank is communicated with the water outlet of the anaerobic tank and is used for carrying out aerobic treatment on the wastewater after the anaerobic treatment;

the water inlet of the sedimentation tank is communicated with the water outlet of the aerobic tank and is used for settling the wastewater after the aerobic treatment;

and the water inlet of the ecological tank is communicated with the water outlet of the sedimentation tank and is used for purifying the waste water after sedimentation again, and the ecological tank is communicated with a waste water discharge pipeline.

Preferably, the system further comprises a sludge treatment tank which is communicated with a filter press, and the filter press is suitable for discharging the treated sludge press cake.

Preferably, the electric flocculation tank is provided with a sludge discharge port I, and the sludge discharge port I is communicated with the sludge treatment tank through a sludge discharge pipeline I.

Preferably, the sedimentation tank is provided with a sludge discharge port II, and the sludge discharge port II is communicated with the sludge treatment tank through a sludge discharge pipeline II.

Preferably, the sludge discharge pipeline II is also communicated with a sludge return pipeline, and an outlet of the sludge return pipeline is communicated with the anaerobic tank and the aerobic tank.

Preferably, a three-phase separator is arranged in the anaerobic tank, and the three-phase separator is suitable for separating methane generated by the anaerobic tank.

Preferably, an aeration device is arranged in the aerobic tank, and the aeration device is communicated with a blower through an aeration pipe.

Preferably, the aerobic tank is provided with suspended fillers.

Preferably, the sedimentation tank is provided with a sludge return pipeline, and an outlet of the sludge return pipeline is communicated with the anaerobic tank and the aerobic tank.

Preferably, the ecological pool comprises an artificial substrate layer, an aquatic plant layer and a microbial population water layer from bottom to surface.

As mentioned above, the utility model discloses application effluent disposal system has following beneficial effect:

the utility model discloses application wastewater treatment system is through setting gradually the regulation homogenization pond, the electric flocculation pond, the anaerobism pond, good oxygen pond, sedimentation tank and ecological pool treatment application waste water, at first adjust the homogenization messenger sewage evenly unanimous, the electric flocculation method adsorbs, subsides and get rid of some impurity, and loop through the anaerobism, good oxygen treatment is with organic matter and macromolecule, the degradation of difficult degradation material, then through the sedimentation tank with anaerobism pond and good oxygen pond processing back waste water in organic sludge get rid of, the matrix that sets up through the ecological pool at last and the targeted pollutant that further removes of aquatic plant, the utility model discloses an application wastewater treatment system not only energy saving and consumption reduction, with low costs, need not adopt a large amount of chemical agent so that increase emission risk simultaneously, the processing back waste water can reach emission standard moreover.

Drawings

FIG. 1 is a schematic structural view of the coating wastewater treatment system of the present invention.

Description of the reference numerals

1. Regulating homogenizing pool

2. Electric flocculation tank

3. Anaerobic tank

4. Aerobic tank

5. Sedimentation tank

6. Ecological pool

7. Sludge treatment pool

8. Filter press

11. Liquid level meter

21. Sludge discharge pipeline I

31. Three-phase separator

41. Blower fan

42. Aeration device

51. Sludge discharge pipeline II

52. Sludge return line

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as a fixed connection, a detachable connection, or an integral part; the connection can be mechanical connection, electrical connection or communication connection; either directly or indirectly through intervening media, either internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Please refer to fig. 1. It should be noted that the drawings provided in the present embodiment are only for schematically illustrating the basic concept of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, amount and proportion of each component may be changed arbitrarily and the layout of the components may be more complicated.

As shown in fig. 1, the embodiment of the utility model provides a coating wastewater treatment system, include:

the adjusting and homogenizing tank 1 is communicated with a wastewater inlet pipeline; by adjusting the water quality and quantity of the wastewater in a balanced manner and controlling the change of the water temperature, the buffering capacity on organic load is improved, the nonuniformity of discharged wastewater is overcome, and the impact on subsequent treatment equipment is reduced.

The water inlet of the electric flocculation tank 2 is communicated with the water outlet of the adjusting and homogenizing tank 1 and is used for flocculating the adjusted and homogenized wastewater; various impurities in the wastewater are decomposed and adsorbed by oxidation, reduction and flocculation.

The water inlet of the anaerobic tank 3 is communicated with the water outlet of the electric flocculation tank 2 and is used for carrying out anaerobic treatment on flocculated wastewater; under anaerobic condition, the organic matter in the waste water is decomposed, metabolized and digested by anaerobic bacteria, so that the content of the organic matter in the waste water is reduced.

The water inlet of the aerobic tank 4 is communicated with the water outlet of the anaerobic tank 3 and is used for carrying out aerobic treatment on the wastewater after the anaerobic treatment; aerobic microorganisms metabolize in the presence of oxygen to degrade organic matter.

A water inlet of the sedimentation tank 5 is communicated with a water outlet of the aerobic tank 4 and is used for settling the wastewater after the aerobic treatment; the solid suspended substances suspended in the wastewater are separated and removed by physical action. Physical effects include gravity separation, centrifugation or screen retention.

The ecological pool 6, the water inlet of ecological pool 6 and the delivery port intercommunication of sedimentation tank 5 for purify waste water once more after will deposiing, ecological pool 6 intercommunication waste water discharge pipeline. The purification purpose is achieved by utilizing the physical action, the chemical action and the biological action among the substrate, the aquatic plants and the microorganisms in the ecological pool.

The utility model discloses application wastewater treatment system handles the back with application waste water and gets into the electric flocculation basin 2 and flocculate in regulation homogenization pond 1, then passes through anaerobism pond 3, good oxygen pond 4 and sedimentation tank 5 in proper order, and the spontaneous flow gets into ecological pool 6 and further gets rid of the pollutant after 5 processing of sedimentation tank.

In a preferred embodiment, as shown in fig. 1, the coating wastewater treatment system of the present invention further comprises a sludge treatment tank 7, wherein the sludge treatment tank 7 is communicated with a filter press 8, and the filter press 8 is adapted to discharge treated sludge press cake. The water content of the sludge before filter pressing is high, the volume of a press cake formed after filter pressing by the filter press 8 is small, the water content is greatly reduced, and the transportation is convenient. In a preferred embodiment, as shown in fig. 1, the electrocoagulation cell 2 of the coating wastewater treatment system of the present invention is provided with a sludge discharge port I, and the sludge discharge port I is communicated with the sludge treatment cell 7 through a sludge discharge pipeline I21. The sedimentation tank 5 is provided with a sludge discharge port II which is communicated with the sludge treatment tank 7 through a sludge discharge pipeline II 51.

Wherein, the electric flocculation tank 2 adopts an electric flocculation method to treat the wastewater, the sludge amount generated by the electric flocculation tank 2 of the utility model is 40-80% less than that generated by the traditional chemical adding treatment process, thereby greatly reducing the disposal cost of the sludge; the hydroxide floc generated by the electric flocculation tank 2 has higher activity, stronger coagulation and adsorption capacity and better treatment effect than that of a medicament method. The electric flocculation tank 2 of the utility model is basically equivalent to the traditional dosing treatment process in the investment aspect, but the operation cost is only 1/10 of the traditional dosing treatment process.

The sludge discharge pipeline II 51 is also communicated with a sludge return pipeline 52, and the outlet of the sludge return pipeline 52 is communicated with the anaerobic tank 3 and the aerobic tank 4. The sludge return pipeline 52 is arranged to return part of the sludge in the sedimentation tank to the anaerobic tank 3 and/or the aerobic tank 4 to maintain the sludge concentration in the anaerobic tank 3 and the aerobic tank 4, so that the anaerobic treatment process in the anaerobic tank 3 and the aerobic treatment process in the aerobic tank 4 are efficiently carried out.

In a preferred embodiment, as shown in fig. 1, in the coating wastewater treatment system of the present invention, the adjusting homogenizing tank 1 is provided with a liquid level meter 11, and the liquid level meter 11 is adapted to detect the liquid level in the adjusting homogenizing tank 1. When the liquid level meter 11 detects that the liquid level in the adjusting and homogenizing tank 1 reaches a high level, the waste water in the adjusting and homogenizing tank 1 is sent to the electric flocculation tank 2 at a certain flow rate through the communicated automatic control system. When the liquid level meter 11 detects that the liquid level in the adjusting and homogenizing tank 1 reaches a low level, the automatic control system inputs waste water into the adjusting and homogenizing tank 1.

In a preferred embodiment, as shown in fig. 1, in the coating wastewater treatment system of the present invention, a three-phase separator 31 is disposed in the anaerobic tank 3, and the three-phase separator 31 is adapted to separate biogas generated in the anaerobic tank 3.

The anaerobic tank 3 adopts an anaerobic biological treatment technology, namely, organic matters in the sewage are decomposed, metabolized and digested by anaerobic bacteria in an anaerobic state, so that the content of the organic matters in the sewage is greatly reduced, and simultaneously, methane is generated in an efficient sewage treatment mode. The process of anaerobic degradation of organic matter can be divided into four stages: hydrolysis stage, fermentation (or acidification) stage, acetogenesis stage and methanogenesis stage.

The anaerobic tank 3 adopted by the wastewater treatment system of the utility model can greatly reduce energy consumption and can also recover biological energy (methane): no blast aeration device for providing oxygen for microorganisms is arranged in the anaerobic biological treatment process, so that a large amount of energy consumption can be reduced. The anaerobic treatment process is accompanied by the production of large amounts of biogas while removing large amounts of organic matter. The methane in the biogas is a combustible gas, has high utilization value and can be directly used for boiler combustion or power generation.

The utility model discloses 3 mud output in the anaerobism pond that effluent disposal system adopted are very low: since most of the organic pollutants in the sewage are converted into methane and carbon dioxide in the anaerobic biological treatment process, the organic matters for cell synthesis are relatively less; meanwhile, the microorganism proliferation rate of the aerobic process is much higher than that of the anaerobic process, the yield Y of acid-producing bacteria is 0.15-0.34 kgVSS/kgCOD, the yield Y of methanogenic bacteria is about 0.03kgVSS/kgCOD, and the yield of the aerobic microorganisms is about 0.25-0.6 kgVSS/kgCOD. So the treatment system of the utility model adopts the sewage to pass through the anaerobic tank first and then pass through the aerobic tank to further reduce the output of the sludge.

The anaerobic tank 3 adopted by the wastewater treatment system of the utility model degrades or partially degrades some organic matters which can not be degraded by aerobic microorganisms through anaerobic biological treatment technology; therefore, when the sewage contains refractory organic substances, the effect of the treatment by using the anaerobic process is better, or the anaerobic process can be used as a pretreatment process for improving the biodegradability of the sewage, so that a foundation is provided for the treatment effect of a subsequent aerobic treatment process, and the energy consumption of the aerobic treatment can be reduced.

The anaerobic treatment method is adopted for high-concentration coating wastewater, anaerobic process forms such as UASB (upflow anaerobic sludge blanket) and the like can be preferably selected, and the UASB is a widely-applied efficient reactor and has the characteristics of energy consumption saving, raw material saving and low manufacturing cost; the reactor can be properly modified for the wastewater with lower concentration, the upper three-phase separator is removed, the reactor is modified into a hydrolysis tank, and the subsequent aerobic treatment conditions can be greatly improved after the wastewater is subjected to hydrolysis treatment.

In a preferred embodiment, as shown in fig. 1, in the coating wastewater treatment system of the present invention, the aerobic tank 4 is provided with an aeration device 42, and the aeration device 42 is connected to the blower 41 through an aeration pipe.

The aerobic tank 4 adopts aerobic biological treatment, including an activated sludge process (such as SBR) and the like) and a biofilm process (such as biological contact oxidation and the like). The utility model discloses application waste water adopts biomembrane method, and the principle of biomembrane method is, and the biomembrane is at first adsorbed the water layer organic matter, decomposes it by the good oxygen fungus on good oxygen layer, and reentrant anaerobic layer carries out anaerobic decomposition, and the water layer that flows then washes ageing biomembrane off with the new biomembrane of growth, so reciprocal purpose in order to reach purified water. The main characteristics are as follows: the microorganisms are diversified, the types are wide, the species are various, and the combined action of various microorganisms is beneficial to the degradation of macromolecules and substances which are difficult to degrade; food chain length of organisms: bacteria-algae-protozoa-metazoan, growing the food chain makes the sludge yield by the biofilm method lower than 1/4 of that by the activated sludge method; microorganisms with long generation times can be present: nitrifying bacteria and denitrifying bacteria, and the biofilm method has the function of denitrifying denitrification; the process design can be divided into a plurality of sections to form different dominant species distributions of microorganisms, and the biomembrane method is beneficial to the full play of the metabolism function of the microorganisms; the biological membrane has stronger water quality change impact resistance and can bear higher organic load; has the advantages of no sludge bulking phenomenon, convenient operation and management, less power consumption, etc.

Wherein, the aerobic tank 4 is provided with suspended filler. The suspended filling Material (MBBR) makes the carrier in a fluidized state by means of aeration in the aeration tank and the lifting action of water flow. Compared with the traditional suspension type filler (the suspension type filler and the supporting structure thereof have larger one-time investment, the filler is easy to block, and the replacement and the maintenance are troublesome), the MBBR process does not need a filler support, saves the installation time and the cost, and is convenient for the maintenance of aeration equipment and the replacement and the supplement of the filler.

In a preferred embodiment, as shown in fig. 1, in the coating wastewater treatment system of the present invention, the ecological pool 6 includes an artificial substrate layer, an aquatic plant layer and a microbial population water layer from the bottom to the surface.

The sewage treatment ecological pool formed by the artificial substrate, the aquatic plants and the microorganisms generates triple synergistic effect by utilizing the interaction among the substrate, the aquatic plants and the microorganisms in the system and the physical action, the chemical action and the biological action, thereby realizing the purpose of efficiently purifying the sewage.

In a preferred embodiment, the ecological pool 6 in the coating wastewater treatment system is an artificial wetland. The artificial wetland is an open system, can be used for wastewater treatment and can be used as an ecological landscape. The investment of the artificial wetland is low, and the construction and operation management costs are low; meanwhile, the sewage treatment effect is good, the management is convenient, and the influence on the surrounding environment is small; different types of plants can be planted to treat different pollutants in a targeted manner.

To sum up, the utility model discloses application wastewater treatment system adopts and adjusts the homogenization pond, the electric flocculation pond, the anaerobism pond, good oxygen pond, the combined mode of sedimentation tank and ecological pond is handled application wastewater, at first adjust the homogenization to application wastewater and reduce the impact to follow-up biological treatment equipment, then suspended impurity and colloidal impurity in the electric flocculation coagulation sedimentation aquatic, after again carry out the anaerobism, good oxygen treatment, the anaerobism pond is located to the electric flocculation pond, before the good oxygen pond, the anaerobism has been reduced, the energy consumption of good oxygen treatment, not only reduce mud output before locating good oxygen pond with the anaerobism pond, and can further reduce the energy consumption of good oxygen treatment, later set up the sedimentation tank and get rid of the anaerobism, mud and suspended solid impurity that good oxygen pond produced, partial mud refluxes back to the anaerobism simultaneously, the effect that good oxygen pond guaranteed anaerobic treatment and good oxygen treatment, waste water flows into ecological pond at last, can carry out the pertinence processing up to standard to waste water, guarantee to discharge waste water. The utility model discloses an application wastewater treatment system not only energy saving and consumption reduction, the gained play water of waste water treatment satisfies emission standard moreover through reasonable each wastewater treatment pond that sets up. Therefore, the utility model effectively overcomes various defects in the prior art and has high production and utilization values.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. A coating wastewater treatment system, comprising:

the adjusting and homogenizing tank (1), the adjusting and homogenizing tank (1) is communicated with a wastewater inlet pipeline;

the water inlet of the electric flocculation tank (2) is communicated with the water outlet of the adjusting and homogenizing tank (1) and is used for flocculating the adjusted and homogenized wastewater;

the water inlet of the anaerobic tank (3) is communicated with the water outlet of the electric flocculation tank (2) and is used for carrying out anaerobic treatment on flocculated wastewater;

the water inlet of the aerobic tank (4) is communicated with the water outlet of the anaerobic tank (3) and is used for carrying out aerobic treatment on the wastewater after the anaerobic treatment;

a water inlet of the sedimentation tank (5) is communicated with a water outlet of the aerobic tank (4) and is used for settling the wastewater after the aerobic treatment;

the ecological pool (6), the water inlet of ecological pool (6) and the delivery port intercommunication of sedimentation tank (5) for waste water purifies once more after will deposiing, ecological pool (6) intercommunication waste water discharge line.

2. The coating wastewater treatment system according to claim 1, further comprising a sludge treatment tank (7), wherein the sludge treatment tank (7) is communicated with a filter press (8), and the filter press (8) is adapted to discharge treated sludge press cake.

3. The coating wastewater treatment system according to claim 2, wherein the electrocoagulation cell (2) is provided with a sludge discharge port I, and the sludge discharge port I is communicated with the sludge treatment cell (7) through a sludge discharge pipeline I (21).

4. The coating wastewater treatment system according to claim 2, wherein the sedimentation tank (5) is provided with a sludge discharge port II, and the sludge discharge port II is communicated with the sludge treatment tank (7) through a sludge discharge line II (51).

5. The coating wastewater treatment system according to claim 4, wherein the sludge discharge pipeline II (51) is further communicated with a sludge return pipeline (52), and an outlet of the sludge return pipeline (52) is communicated with the anaerobic tank (3) and the aerobic tank (4).

6. The painting wastewater treatment system according to claim 1, characterized in that the regulating homogenization tank (1) is provided with a liquid level meter (11), and the liquid level meter (11) is adapted to detect the liquid level in the regulating homogenization tank (1).

7. The painting wastewater treatment system according to claim 1, characterized in that a three-phase separator (31) is provided in the anaerobic tank (3), the three-phase separator (31) being adapted to separate biogas generated by the anaerobic tank (3).

8. The coating wastewater treatment system according to claim 1, wherein the aerobic tank (4) is provided with an aeration device (42), and the aeration device (42) is communicated with a blower (41) through an aeration pipe.

9. The coating wastewater treatment system according to claim 1, wherein a suspension filler is provided in the aerobic tank (4).

10. The coating wastewater treatment system according to claim 1, wherein the ecological pond (6) comprises an artificial substrate layer, an aquatic plant layer and a microbial population water layer from bottom to surface.