CN212894260U

CN212894260U - Recovery processing system of electroplating sewage

Info

Publication number: CN212894260U
Application number: CN202021721696.4U
Authority: CN
Inventors: 林超
Original assignee: Weitai Technology Wuxi Co ltd
Current assignee: Weitai Technology Wuxi Co ltd
Priority date: 2020-08-18
Filing date: 2020-08-18
Publication date: 2021-04-06
Anticipated expiration: 2030-08-18

Abstract

The utility model discloses a recovery processing system of electroplating sewage, including electroplating treatment qualification row water tank, connect gradually first buffer pool, prefiltration unit, ultrafiltration system, second buffer pool, disinfection unit, water supply system through the pipeline behind the electroplating treatment qualification row water tank, disinfection unit is connected with prefiltration unit through the backwash water pipe, water supply system passes through the water pump and connects domestic water, be equipped with the filter in the prefiltration unit, be equipped with the hollow fiber milipore filter in the ultrafiltration system, be external pressure membrane in the hollow fiber milipore filter, the membrane wall is two-layer, has independent inner wall supporting layer, be equipped with disinfectant in the disinfection unit, disinfectant has been added in the disinfectant, be equipped with online pH controller between electroplating treatment qualification row water tank and the first buffer pool, this recovery system can retrieve the qualified effluent of electroplating sewage, and the water is treated, and the treated water can be used.

Description

Recovery processing system of electroplating sewage

Technical Field

The utility model belongs to the sewage treatment field especially relates to a recovery processing system of electroplating sewage.

Background

The biochemical sewage in the electroplating industry is a considerable amount, so that the reclaimed water is necessary to be recycled.

Because of the adoption of the ultrafiltration system, the index of the produced recycled reclaimed water can approach the three-level drinking water standard in natural lakes, and only because of the problem of drinking water safety, the water of the reclaimed water recycling system specified by the state in recent regulations is not suitable for drinking, but the water passing through the ultrafiltration system can be used as the make-up water for fire fighting, greening, toilet flushing and landscape pools, and the recycled production line can also be used as pre-cleaning wastewater. The electroplating reuse water system is connected to the fire-fighting network of the factory building and used for irrigation in greening, and can also be connected with a special pipeline for flushing a toilet, and meanwhile, the landscape fountain and the landscape river of the enterprise can also use the reuse water.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a recovery processing system of electroplating sewage for overcoming the defects of the prior art.

The purpose of the utility model can be realized through the following technical scheme:

the utility model provides a recovery processing system of electroplating effluent, including electroplating treatment qualification drainage groove, connect gradually first buffer pool, prefiltration unit, ultrafiltration system, second buffer pool, disinfection unit, water supply system behind the electroplating treatment qualification drainage groove through the pipeline, disinfection unit passes through the backwash water pipe and is connected with prefiltration unit, water supply system passes through the water pump and connects domestic water, be equipped with the filter in the prefiltration unit, be equipped with the hollow fiber milipore filter in the ultrafiltration system, be external pressure membrane in the hollow fiber milipore filter, the membrane wall is two-layer, has independent inner wall supporting layer, be equipped with disinfectant in the disinfection unit, disinfectant has added in the disinfectant, be equipped with online pH controller between electroplating treatment qualification drainage groove and the first buffer pool.

Preferably, a liquid level switch is arranged in the first buffer tank.

Preferably, a quartz sand and activated carbon filter is arranged in the pre-filtering unit.

Preferably, the disinfectant is sodium hypochlorite.

Preferably, a water pump is arranged between the first buffer pool and the electroplating treatment qualified drainage tank.

Preferably, the recycling system further comprises a control system, the control system comprises a display screen, and the control system is connected with the water pump and the online pH controller.

The utility model has the advantages that:

the recovery system can recover qualified discharged water of electroplating sewage and treat the water, the treated water can be used, water resources are saved, the environment is protected, resources are saved, and the cost is reduced.

Drawings

FIG. 1 is a schematic structural view of a system for recycling and treating electroplating wastewater.

Detailed Description

The technical scheme of the utility model is further described with the attached drawings:

In this embodiment, preferably, a liquid level switch is disposed in the first buffer tank.

In this embodiment, preferably, a quartz sand and an activated carbon filter are disposed in the pre-filtering unit.

In this embodiment, preferably, the disinfectant is sodium hypochlorite.

In this embodiment, preferably, a water pump is disposed between the first buffer pool and the electroplating treatment qualified drainage tank.

In this embodiment, preferably, the recycling system further includes a control system, the control system includes a display screen, and the control system is connected with the water pump and the online pH controller.

Electroplating effluent is qualified water after pretreatment and is discharged into a first buffer pool from the qualified discharge water tank effluent of electroplating treatment for raw water header tank caching, and even quality of water has played regulation and buffering effect to realize automatic control operation follow-up equipment through the liquid level switch that sets up in the water tank. And when the liquid level of the water collecting tank of the first buffer tank is higher than a set height, starting a lift pump to enable wastewater to enter a pre-filtering unit, wherein a quartz sand and activated carbon filter is arranged in the pre-filtering unit. The filter material is used for removing turbidity and dirt of raw water, and can effectively remove larger particle suspended matters, colloids, partial COD (chemical oxygen demand), reducing oxidant and the like in water by utilizing the dirt interception and adsorption capacity of the filter material so as to ensure the normal operation of subsequent treatment. After a period of treatment, when the pressure difference between the inlet water and the outlet water is more than or equal to 0.7kg/cm, the equipment adopts backwashing measures to meet the normal treatment efficiency. When water is used for backwashing, air is added, the strength of backwashing air is 15l/(m2 & s), and the pressure of backwashing air is less than or equal to 0.15 MPa. Because the pH value of the wastewater cannot be effectively controlled due to inherent uncertainty of the production wastewater, an online pH controller is arranged behind a pump and used for detecting the pH value of the wastewater, and a signal is fed back by the pH controller to feed a pH adjusting metering pump with a drug and adjust the drug to a set value, so that the hazards of scaling, pollution, corrosion and the like caused to a later-stage system are prevented. In order to prevent fine particles in water from entering a subsequent system, a 50-micron bag filter is specially arranged for filtering, so that the filtering rate of the fine particles is ensured. The wastewater filtered by the sand filtration carbon filter bag enters an ultrafiltration system.

The hollow fiber ultrafiltration membrane arranged in the ultrafiltration system is characterized in that stock solution permeates through the hollow fibers from outside to inside along the radial direction to become permeate liquid through pressure difference, and the intercepted substances are collected outside the hollow fibers. The hollow fiber membrane module may be used in reverse. Pressing the film outside; the composite membrane has 2 layers of membrane walls and an independent inner wall supporting layer, can not be crushed by external pressure, and can be divided into a full-volume filtration mode and a cross-flow filtration mode in water treatment ultrafiltration membrane filtration. The full-volume filtration is also called as dead-end filtration, which means that all feed water permeates a membrane (the water yield is equal to the feed water amount during operation), and intercepted substances are remained on the feed water side of an ultrafiltration membrane, and after a period of operation, the intercepted substances are accumulated to a certain degree and need to be washed. When the influent water has a low suspended matter content, turbidity and COD value, it is considered to use full filtration. Cross-flow filtration means that most of the feed water permeates the membrane and the remaining portion of the feed water forms concentrate that is discharged from the system along the membrane surface. The purpose of cross flow is to increase the tangential flow velocity of the membrane surface and alleviate membrane pollution; but the water utilization rate is relatively low and the energy consumption is large. Different flow rates are selected according to different water qualities of raw water. In general, the system fault flow rate should be designed to be 10-35% of the filtering flow rate. Full-scale filtration generally requires consideration of positive flushing, and cross-flow filtration generally does not require positive flushing.

The automatic control operation and running have the necessary protection of flow display, water pump water shortage protection, pure water full level shutdown and the like. The backwashing water pump is shared with the new ultrafiltration.

The reclaimed water after ultrafiltration treatment enters disinfectant water to be in full contact reaction with disinfectant sodium hypochlorite, so that toxic and harmful bacteria, algae and the like in the water body are eliminated. The recycling water supply system supplies water to the water using end of the enterprise factory through a constant-pressure variable-frequency water supply pump erected on the disinfection tank.

Finally, it should be noted that:

the skilled person can, with reference to the present disclosure, carry out the method and carry out its application, it being expressly noted that all similar substitutes and modifications apparent to the skilled person are deemed to be included within the present invention. The method and application of the present invention have been described in terms of preferred embodiments, and it will be apparent to those skilled in the art that the techniques of the present invention may be practiced and used without departing from the spirit and scope of the present invention by modifying or otherwise appropriately changing or combining the various methods and applications of the present invention.

The above embodiments are only used for illustrating but not limiting the technical solutions of the present invention, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention, and the appended claims are intended to cover such modifications and equivalents as fall within the spirit and scope of the invention.

Claims

1. The utility model provides a recovery processing system of electroplating effluent which characterized in that: the water supply system comprises an electroplating treatment qualified drainage tank, wherein a first buffer tank, a pre-filtering unit, an ultrafiltration system, a second buffer tank, a disinfection unit and a water supply system are sequentially connected with the electroplating treatment qualified drainage tank through a pipeline, the water supply system is connected with the pre-filtering unit through a backwashing water pipe, the water supply system is connected with domestic water through a water pump, a filter is arranged in the pre-filtering unit, a hollow fiber ultrafiltration membrane is arranged in the ultrafiltration system, an external pressure membrane is arranged in the hollow fiber ultrafiltration membrane, the membrane wall is two-layer, an independent inner wall supporting layer is arranged, disinfectant is arranged in the disinfection unit, a disinfectant is added in the disinfectant, and an online pH controller is arranged between the electroplating treatment qualified drainage tank and the first buffer tank.

2. A recycling treatment system according to claim 1, wherein: and a liquid level switch is arranged in the first buffer tank.

3. A recycling treatment system according to claim 2, wherein: the disinfectant is sodium hypochlorite.

4. A recycling treatment system according to claim 3, wherein: and a water pump is arranged between the first buffer pool and the electroplating treatment qualified drainage tank.

5. A recycling treatment system according to claim 4, wherein: the recycling system further comprises a control system, the control system comprises a display screen, and the control system is connected with the water pump and the online pH controller.