CN215559653U - Wastewater zero-discharge system for electrophoresis workshop - Google Patents
Wastewater zero-discharge system for electrophoresis workshop Download PDFInfo
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- CN215559653U CN215559653U CN202121592213.XU CN202121592213U CN215559653U CN 215559653 U CN215559653 U CN 215559653U CN 202121592213 U CN202121592213 U CN 202121592213U CN 215559653 U CN215559653 U CN 215559653U
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Abstract
The utility model belongs to the technical field of wastewater treatment, and particularly relates to a wastewater zero discharge system for an electrophoresis workshop. The method overcomes the defects of the prior art, purifies and recycles the wastewater of each process except the phosphorization process on the premise of meeting the process requirements, concentrates and evaporates the wastewater of the phosphorization process, fundamentally solves the problem of discharging the wastewater of the electrophoretic coating line, and effectively solves the labor cost of enterprises for investment in the aspect of environmental protection.
Description
Technical Field
The utility model belongs to the technical field of wastewater treatment, and particularly relates to a wastewater zero discharge system for an electrophoresis workshop.
Background
At present, in most of the electrophoretic coating lines, a certain amount of waste water is generated in the degreasing, phosphating and each flushing process, and after the waste water is generated, the waste water is discharged in an overflow mode or a reversed groove discharging mode.
Because the electrophoretic coating line has more processes, the types of generated waste water are different, and the harm forms to the environment are different, the following table is the approximate situation of the waste water discharge of the electrophoretic coating line in a certain factory, and the following is taken as an example for explanation:
aiming at the large wastewater enterprises, corresponding sewage treatment stations are established to carry out classification pretreatment on the wastewater, then the wastewater is collected with other workshop wastewater and domestic sewage to carry out centralized treatment, and the wastewater is discharged to a downstream sewage treatment plant for advanced treatment after reaching an external discharge index, so that the treatment mode often forces the enterprises to input a large amount of manpower, material resources and financial resources, great burden is caused to the enterprises, the requirement on the allocation of professional personnel is high, once the operation is improper, a series of results can be caused, and the production stop of the whole production line can be caused in serious cases; due to the facts that small and medium-sized enterprises are low in capital and environmental awareness, the enterprises can steal and disguise the information at great risk, pollute the environment and cause extremely bad influence.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a wastewater zero discharge system for an electrophoresis workshop, which overcomes the defects of the prior art, purifies and recycles wastewater of various procedures except dephosphorization on the premise of meeting the process requirements, concentrates and evaporates the wastewater of the phosphating procedure, fundamentally solves the problem of wastewater discharge of an electrophoresis coating line, and effectively solves the labor cost of enterprises on the aspect of environmental protection.
In order to solve the problems, the technical scheme adopted by the utility model is as follows:
a waste water zero release system for electrophoresis workshop includes
A degreasing treatment system: the device comprises a pre-degreasing tank and a degreasing tank for removing grease on the surface of a workpiece, oil-water separation equipment for membrane separation treatment, a treatment tank and a concentration tank for reflux circulation;
degreasing and water washing treatment system: the first degreasing wash bowl and the second degreasing wash bowl are used for cleaning a degreasing agent on the surface of a workpiece, and the electrically-driven membrane equipment is used for separating the degreasing agent;
a phosphating treatment system: comprises a phosphating tank for forming a phosphating film and an inclined plate settling tank for treating phosphating slag;
phosphating and water washing treatment system: comprises a phosphating rinsing bath for cleaning a phosphating workpiece, a first rinsing bath, a second rinsing bath, a sewage pool for collecting waste water, sewage integrated equipment for sewage treatment, hollow fiber ultrafiltration equipment and high-pressure reverse osmosis equipment;
an electrophoresis processing system: comprises an electrophoresis cleaning tank for cleaning electrophoresis paint and a double-membrane treatment assembly for treating cleaning wastewater.
Further, the degreasing bath is through anti-overflow pipeline and degreasing bath intercommunication in advance, second degreasing wash bowl passes through overflow pipeline and first degreasing wash bowl intercommunication, oil-water separation equipment is used for handling the waste water in the treatment trough, flows back the concentrate of separation and pure water respectively in treatment trough and degreasing bath and the degreasing bath in advance, the concentrate tank passes through the pipeline and is connected with the degreasing bath.
Further, the electrically-driven membrane equipment is used for separating charged ions in the degreased washing water from the water by taking the potential difference as a driving force, and respectively refluxing the separated charged ions and the separated pure water into the concentration tank and the second degreased washing tank.
Furthermore, a feeding pipeline of the inclined plate settling tank is connected with the bottom of the phosphating rinsing tank, and the top of the inclined plate settling tank is connected with the phosphating rinsing tank through an overflow pipeline.
Further, connect gradually through overflow pipe between first wash bowl, second wash bowl and the bonderizing wash bowl, the effluent water sump passes through the pipeline and collects bonderizing wash bowl and the abluent waste water in ground, sewage integration equipment makes sewage flocculate-congeal, and mud and the moisture that the re-segregation bonderizing sediment formed, hollow fiber ultrafiltration equipment carries out retreatment to the moisture of isolating, discharges effluent water sump and former basin respectively with the processing concentrate and the pure water of separation, the former basin passes through the pipeline and is connected with high-pressure reverse osmosis equipment, discharges the water purification and the dense water of separation to former water tank and centrifugal evaporator respectively.
Further, the sludge generated by the inclined plate settling tank and the sewage integrated equipment is treated by the plate-and-frame press filter and then is merged and sent to a qualified hazardous waste treatment center for centralized treatment, and the water generated by the plate-and-frame press filter flows back to the phosphating rinsing tank and the sewage tank respectively.
Further, two membrane processing subassemblies include ultrafiltration apparatus, EDRO reverse osmosis equipment, ultrafiltrate storage tank, ultrafiltration tank and spray tank, ultrafiltration apparatus utilizes membrane separation technique to handle the sewage that the electrophoresis tank produced, and concentrate and ultrafiltrate after will handling discharge respectively to electrophoresis tank and ultrafiltrate storage tank, the ultrafiltrate storage tank passes through pipeline and EDRO reverse osmosis equipment intercommunication, and EDRO reverse osmosis equipment transmits the permeate liquid that produces to spray tank, and with the ultrafiltrate backward flow to the ultrafiltrate storage tank of purification, the ultrafiltrate storage tank passes through overflow pipeline and is connected with ultrafiltration tank, connect gradually through overflow pipeline between spray tank, ultrafiltration tank and the electrophoresis tank.
Compared with the prior art, the utility model has the following beneficial effects:
according to the wastewater zero discharge system for the electrophoresis workshop, the produced wastewater is purified, recycled, concentrated and evaporated by using the membrane separation equipment and other auxiliary equipment, so that the purpose of wastewater zero discharge is achieved.
Drawings
FIG. 1 is a block diagram of a wastewater zero discharge system for an electrophoresis plant.
Fig. 2 is a schematic structural diagram of a degreasing and degreasing water washing system in a wastewater zero discharge system for an electrophoresis plant.
FIG. 3 is a schematic structural diagram of a phosphating and washing system in a wastewater zero-discharge system for an electrophoresis workshop.
Fig. 4 is a schematic structural diagram of an electrophoresis system in a wastewater zero discharge system for an electrophoresis plant.
In the figure: 101. a pre-degreasing tank; 102. a degreasing tank; 103. a concentration tank; 104. an oil-water separation device; 105. a treatment tank; 201. a first degreasing rinsing bath; 202. a second degreasing rinsing bath; 203. electrically driving the membrane device; 301. a phosphating tank; 302. an inclined plate settling tank; 401. a first rinsing bath; 402. a second rinsing bath; 403. a phosphating rinsing bath; 404. a sewage tank; 405. sewage integrated equipment; 406. a high pressure reverse osmosis plant; 407. a raw water tank; 408. a hollow fiber ultrafiltration device; 409. a centrifugal evaporator; 501. A spray tank; 502. an ultrafiltration tank; 503. an electrophoresis tank; 504. an ultrafiltrate reservoir; 505. ultrafiltration equipment; 506. EDRO reverse osmosis equipment.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in figures 1 to 4, the utility model relates to a wastewater zero discharge system for an electrophoresis plant, which comprises
A degreasing treatment system: comprises a pre-degreasing tank 101 and a degreasing tank 102 for removing grease on the surface of a workpiece, an oil-water separation device 104 for membrane separation treatment, a treatment tank 105 and a concentration tank 103 for reflux circulation;
degreasing and water washing treatment system: a first degreasing water washing tank 201 and a second degreasing water washing tank 202 for washing the degreasing agent on the surface of the workpiece, and an electrically driven membrane device 203 for separating the degreasing agent;
a phosphating treatment system: comprises a phosphorization tank 301 for forming a phosphorization film and an inclined plate settling tank 302 for treating phosphorization slag;
phosphating and water washing treatment system: comprises a phosphating rinsing bath 403 for cleaning phosphating workpieces, a first rinsing bath 401 and a second rinsing bath 402, a sewage tank 404 for collecting wastewater, a sewage integrated device 405 for sewage treatment, a hollow fiber ultrafiltration device 408 and a high-pressure reverse osmosis device 406;
an electrophoresis processing system: comprises an electrophoresis cleaning tank for cleaning electrophoresis paint and a double-membrane treatment assembly for treating cleaning wastewater.
Degreasing bath 102 communicates with degreasing bath 101 in advance through the anti-overflow pipeline, and second degreasing wash bowl 202 communicates with first degreasing wash bowl 201 through the overflow pipeline, and oil-water separation equipment 104 is used for handling the waste water in treatment tank 105, in the concentrated solution and the pure water that will separate flow back respectively treatment tank 105 and degreasing bath 102 and degreasing bath 101 in advance, concentrated tank 103 is connected with degreasing bath 102 through the pipeline.
The ceramic membrane oil-water separation system is adopted for oil removal treatment, the grain size of oil drops of emulsified oil is taken as a separation basis, the ceramic membrane with the aperture of 50nm is adopted, the liquid in the pre-degreasing tank 101 is taken as raw water for purification and separation, the produced pure water returns to the degreasing tank 102 and returns to the pre-degreasing tank 101 through a reverse overflow pipeline additionally arranged between the pre-degreasing tank and the degreasing tank 102, so that the pre-degreasing and degreasing processes form stable closed reverse circulation, and the generation of waste water is avoided.
The electrically driven membrane device 203 is configured to separate charged ions in the degreased rinse water from water by using a potential difference as a driving force, and return the separated charged ions and pure water to the concentration tank 103 and the second degreased rinse water tank 202, respectively.
Aiming at the root cause of the degreased back flushing wastewater, the membrane separation technology is utilized, the electric drive membrane purification recovery equipment is adopted to conduct the conductivity reduction operation on the degreased back flushing wastewater, under the action of an electric field, the potential difference is used as the driving force, the charged ions (namely, degreaser components) in the degreased back flushing water are separated from the water, the water returns to the degreased water washing tank to continue to conduct the spraying and cleaning work, the degreaser components are transferred to the concentration tank 103 to be concentrated continuously, when the degreaser components are concentrated to a certain degree, the degreaser components return to the degreasing tank 102 through the electromagnetic valve to be supplemented with the degreaser, and therefore the generation of the degreased back flushing wastewater is avoided.
The feed pipe of inclined plate settling tank 302 is connected with the bottom of phosphating washing tank 403, and the top of the feed pipe is connected with phosphating washing tank 403 through an overflow pipe.
Sludge generated by the inclined plate settling tank 302 and the sewage integrated equipment 405 is treated by a plate-and-frame press filter, then is combined and sent to a qualified hazardous waste treatment center for centralized treatment, and water generated by the plate-and-frame press filter flows back to the phosphating rinsing tank 403 and the sewage tank 404 respectively.
Because the phosphating slag is easy to block a membrane element, the film element cannot be directly removed by using a membrane separation technology, for this reason, a zero discharge system discharges the phosphating slag into a sewage tank 404 aiming at the root cause generated by the phosphating and the washing wastewater after the phosphating, the phosphating slag is firstly flocculated-coagulated by using sewage treatment integrated equipment to form large fluffy sludge, the phosphating slag is sunk into the bottom of a conical tank through an inclined plate settling tank 302 and is removed through a plate and frame filter press, and most of the phosphating slag is removed from the produced water; then, by utilizing a membrane separation technology, firstly, the hollow fiber ultrafiltration equipment 408 is adopted for secondary treatment, the produced water is combined with the first-stage concentrated water of the pure water equipment, and the water is used as raw water for advanced treatment by utilizing the high-pressure reverse osmosis equipment 406; the water produced by the high-pressure reverse osmosis equipment 406 can completely meet the requirement of preparing raw water of pure water, so that the raw water is utilized, the concentrated water of the high-pressure reverse osmosis equipment 406 and the concentrated water of the hollow fiber ultrafiltration equipment 408 are combined and then enter the centrifugal evaporator 409 to be evaporated and centrifugally operated, solid phosphated slag and phosphated slag treated by the plate and frame filter press are combined and are sent to a qualified hazardous waste treatment center to be subjected to centralized treatment, and liquid returns to the sewage tank 404 to be subjected to circulating treatment, so that the purposes of phosphatization and no sewage discharge in a washing process after phosphatization are ensured.
The double-membrane treatment assembly comprises an ultrafiltration device 505, an EDRO reverse osmosis device 506, an ultrafiltrate storage tank 504, an ultrafiltration tank 502 and a spray tank 501, the ultrafiltration device 505 treats sewage generated by the electrophoresis tank 503 by using a membrane separation technology, treated concentrated solution and ultrafiltrate are respectively discharged to the electrophoresis tank 503 and the ultrafiltrate storage tank 504, the ultrafiltrate storage tank 504 is communicated with the EDRO reverse osmosis device 506 through a pipeline, the EDRO reverse osmosis device 506 transmits generated permeate to the spray tank 501, purified ultrafiltrate flows back to the ultrafiltrate storage tank 504, the ultrafiltrate storage tank 504 is connected with the ultrafiltration tank 502 through an overflow pipeline, and the spray tank 501, the ultrafiltration tank 502 and the electrophoresis tank 503 are sequentially connected through overflow pipelines.
By utilizing a membrane separation technology, the ultrafiltrate is purified by adopting a double-membrane treatment assembly, the generated permeate replaces pure water (washing water after electrophoresis) to carry out spray washing on the subsequent procedures on the workpiece, the sprayed water returns to the ultrafiltration tank 502 and reversely overflows back to the electrophoresis tank 503 through an overflow pipeline, so that closed circulation is realized, the sewage containing the electrophoretic coating which is washed down in this way can return to the previous procedure, and then the sewage is completely returned to the electrophoresis tank 503, so that a circulating closed cleaning system is realized, and no sewage is discharged.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (7)
1. The utility model provides a waste water zero release system for electrophoresis workshop which characterized in that: comprises that
A degreasing treatment system: comprises a pre-degreasing tank (101) and a degreasing tank (102) for removing grease on the surface of a workpiece, an oil-water separation device (104) for membrane separation treatment, a treatment tank (105) and a concentration tank (103) for reflux circulation;
degreasing and water washing treatment system: a first degreasing water washing tank (201) and a second degreasing water washing tank (202) for washing the degreasing agent on the surface of the workpiece, and an electrically-driven membrane device (203) for separating the degreasing agent;
a phosphating treatment system: comprises a phosphorization tank (301) for forming a phosphorization film and an inclined plate settling tank (302) for treating phosphorization slag;
phosphating and water washing treatment system: comprises a phosphating water washing tank (403) for cleaning phosphating workpieces, a first water washing tank (401), a second water washing tank (402), a sewage pool (404) for collecting wastewater, sewage integrated equipment (405) for sewage treatment, hollow fiber ultrafiltration equipment (408) and high-pressure reverse osmosis equipment (406);
an electrophoresis processing system: comprises an electrophoresis cleaning tank for cleaning electrophoresis paint and a double-membrane treatment assembly for treating cleaning wastewater.
2. The wastewater zero discharge system for the electrophoresis plant according to claim 1, characterized in that: degreasing bath (102) are through anti-overflow pipeline and degreasing bath (101) intercommunication in advance, second degreasing wash bowl (202) are through overflow pipeline and first degreasing wash bowl (201) intercommunication, oil-water separator (104) are used for handling the waste water in processing tank (105), flow back processing tank (105) and degreasing bath (102) and degreasing bath (101) respectively with the concentrate and the pure water of separation in, concentrate (103) are connected with degreasing bath (102) through the pipeline.
3. The system for zero discharge of wastewater from an electrophoresis plant according to claim 1 or 2, characterized in that: the electrically-driven membrane equipment (203) is used for separating charged ions in the degreased flushing water from the water by taking the potential difference as a driving force, and respectively refluxing the separated charged ions and the pure water into the concentration tank (103) and the second degreased flushing water tank (202).
4. The wastewater zero discharge system for the electrophoresis plant according to claim 1, characterized in that: the feeding pipeline of the inclined plate settling tank (302) is connected with the bottom of the phosphating rinsing tank (403), and the top of the inclined plate settling tank is connected with the phosphating rinsing tank (403) through an overflow pipeline.
5. The wastewater zero discharge system for the electrophoresis plant according to claim 1, characterized in that: connect gradually through overflow pipe between first wash bowl (401), second wash bowl (402) and the bonderizing wash bowl (403), bonderizing wash bowl (403) and the abluent waste water in ground are collected through the pipeline in effluent water sump (404), sewage integration equipment (405) makes sewage flocculate-condense, and mud and the moisture that the re-segregation bonderizing sediment formed, hollow fiber ultrafiltration equipment (408) carry out retreatment to the moisture of isolating, discharge effluent water sump (404) and former basin (407) respectively with the processing concentrate and the pure water of separation, former basin (407) are connected with high-pressure reverse osmosis equipment (406) through the pipeline, discharge the water purification and the dense water of separation to former water tank and centrifugal evaporator (409) respectively.
6. The wastewater zero discharge system for the electrophoresis plant according to claim 5, characterized in that: sludge generated by the inclined plate settling tank (302) and the sewage integrated equipment (405) is treated by a plate-and-frame press filter and then is sent to a qualified hazardous waste treatment center for centralized treatment, and water generated by the plate-and-frame press filter flows back to the phosphating rinsing tank (403) and the sewage tank (404) respectively.
7. The wastewater zero discharge system for the electrophoresis plant according to claim 1, characterized in that: the double-membrane treatment assembly comprises ultrafiltration equipment (505), EDRO reverse osmosis equipment (506), ultrafiltrate storage tank (504), ultrafiltration tank (502) and spray tank (501), ultrafiltration equipment (505) utilizes membrane separation technology to handle the sewage that electrophoresis tank (503) produced, discharges concentrate and ultrafiltrate after handling respectively to electrophoresis tank (503) and ultrafiltrate storage tank (504), ultrafiltrate storage tank (504) communicate with EDRO reverse osmosis equipment (506) through the pipeline, EDRO reverse osmosis equipment (506) transmit the permeate liquid that produces to spray tank (501), and flow back the ultrafiltrate of purification to ultrafiltrate storage tank (504), ultrafiltrate storage tank (504) are connected with ultrafiltration tank (502) through overflow pipeline, connect gradually through overflow pipeline between spray tank (501), ultrafiltration tank (502) and electrophoresis tank (503).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121592213.XU CN215559653U (en) | 2021-07-14 | 2021-07-14 | Wastewater zero-discharge system for electrophoresis workshop |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121592213.XU CN215559653U (en) | 2021-07-14 | 2021-07-14 | Wastewater zero-discharge system for electrophoresis workshop |
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