CN115626739A - Nickel-containing electroplating wastewater treatment and recycling integrated device - Google Patents

Abstract

The invention discloses a nickel-containing electroplating wastewater treatment and recycling integrated device, which comprises a body, wherein the body comprises a treatment and recovery unit and a functional unit which are arranged in parallel, the treatment and recovery unit comprises an adjusting tank, a reaction tank, a breaking tank, a coagulating sedimentation tank, an intermediate water tank, a membrane filtration tank and a water outlet tank which are used for sequentially treating wastewater, the functional unit comprises a dosing room, a glue machine room, a power distribution room and an automatic control room which are sequentially arranged, communicated water paths are arranged among the adjusting tank, the reaction tank, the breaking tank, the coagulating sedimentation tank, the intermediate water tank, the membrane filtration tank and the water outlet tank, and a plurality of flow guide units are respectively arranged in the adjusting tank, the reaction tank and the breaking tank. The invention adopts the integrated forming arrangement, not only solves the problem of nickel-containing wastewater treatment, but also purifies the wastewater into reuse water for the production line, thereby saving water and recycling water resources.

Description

An integrated device for the treatment and reuse of nickel-containing electroplating wastewater

technical field

The invention relates to an integrated device for treating and recycling nickel-containing electroplating wastewater, belonging to the technical field of metal surface treatment.

Background technique

Wastewater containing nickel comes from the metal surface treatment industry mainly based on electroplating. The water of nickel plating and rinsing of plated parts in the production process is the main two pieces of nickel-containing electroplating wastewater. They have a high concentration of nickel ions and the amount of waste plating solution is relatively small. During nickel electroplating or electroless nickel plating, the parts will be washed with tap water, and more than 80% of the electroplating sewage discharge in the workshop mainly comes from the rinsing water of the plated parts produced during the washing process. Different nickel plating methods have different forms in nickel-containing wastewater: nickel electroplating produces wastewater or waste liquid, and the form of nickel is mainly in the form of nickel ions (Ni2+); The formation is the combination of ionic nickel and complex solvent, and a considerable part of waste water and liquid waste is nickel that exists in the form of complexes. At the same time, there are many hypophosphate ions in the sewage.

The biochemical properties of nickel itself generate harmfulness by activating or inhibiting the activity of some enzymes in the body. The nickel contained in the metal has basically no emergency toxicity, and the toxicity of ordinary nickel salts is relatively low. It can lead to contagious skin inflammation. People with nickel poisoning show dermatitis, poor respiratory organs and respiratory tract cancer. Nickel is difficult to degrade in the natural environment. Therefore, nickel pollution is a typical heavy metal pollution. If nickel-containing wastewater is discharged arbitrarily, it will not only cause serious environmental pollution, but also cause great harm to human health.

Contents of the invention

An object of the present invention is to provide an integrated device for treating and recycling nickel-containing electroplating wastewater in view of the defects in the prior art.

In particular, the present invention provides an integrated device for the treatment and reuse of nickel-containing electroplating wastewater, which includes a body, the body includes a treatment and recovery unit and a functional unit arranged in parallel, and the treatment and recovery unit includes adjustments for the sequential treatment of wastewater Pool, reaction pool, network breaking pool, coagulation sedimentation pool, intermediate pool, membrane filtration pool and outlet pool. , Reaction tank, network breaking tank, coagulation sedimentation tank, intermediate pool, membrane filtration tank and outlet pool are provided with interlinked waterways, and multiple flow guide units are respectively arranged in the regulating tank, reaction tank and network breaking tank.

Preferably, the coagulation-sedimentation tank includes a coagulation tank, a flocculation tank and a sedimentation tank for sequentially treating wastewater, and a communicating waterway is provided between the coagulation tank, the flocculation tank and the sedimentation tank.

Preferably, agitators are all provided in the reaction tank, the decomplexation tank, the coagulation tank and the flocculation tank.

Preferably, a UF membrane system, a security filter and an RO membrane system for sequentially treating wastewater are arranged in the membrane filtration tank.

Preferably, the UF membrane system includes a UF membrane, a fouling agent adding device and an activated carbon filter arranged in sequence, for removing suspended particles, microorganisms such as bacteria, small molecule organic matter and residual chlorine impurities in water.

Preferably, the RO membrane system includes an RO membrane, a circulation concentration device and an advanced treatment device, which is pumped into the circulation concentration device by a high-pressure pump, and enters the advanced treatment device after removing tiny organic impurities.

Preferably, the water production flux of the UF membrane system is 1.5-4.0 m3/h, and the UF membrane is made of polyvinylidene fluoride.

Preferably, the flux of the RO membrane system: 10.5m3/d branch, the salt rejection rate: ≥99.5%, and the RO membrane is a polyamide composite membrane.

Preferably, the circulation concentration device adopts a single-stage reverse osmosis circulation concentration device, and the advanced treatment device adopts ion exchange resin for advanced treatment.

Preferably, the processing and recovery unit and the functional unit are integrated.

Beneficial effects: the invention not only solves the problem of nickel-containing wastewater treatment, but also purifies the wastewater into recycled water for use in the production line, so as to save water and recycle water resources;

The integrated device occupies a small space and has high processing efficiency. The public auxiliary room is integrated with the processing unit, which is convenient for assembly. The diversion unit is used to cut off the drainage inside the pool body, optimize the hydraulic head loss, increase the effective residence time, and improve the reaction processing efficiency.

Those skilled in the art will be more aware of the above and other objects, advantages and features of the present invention according to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings.

Description of drawings

Hereinafter, some specific embodiments of the present invention will be described in detail by way of illustration and not limitation with reference to the accompanying drawings. The same reference numerals in the drawings designate the same or similar parts or parts. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale.

In the attached picture:

Fig. 1 is a structural representation of an embodiment of the present invention;

Fig. 2 is a top view of an embodiment of the present invention.

Detailed ways

Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

An integrated device for the treatment and reuse of nickel-containing electroplating wastewater, including a body 1, the body 1 includes a treatment and recovery unit 2 and a functional unit 3 arranged in parallel, and the main pollution indicators of nickel-containing electroplating wastewater are: COD, ammonia nitrogen, SS and Nickel, in order to meet the reuse water standard, the hardness indicators such as Ca2+ and Mg2+ also need to be softened. The nickel-containing electroplating wastewater passes through the treatment and recovery unit, and the functional unit adds drugs to the treatment and recovery unit to treat it and use it as workshop reuse water.

Preferably, the treatment and recycling unit 2 and the functional unit 3 are integrated.

In the actual implementation of the present application, the processing and recovery unit and the functional unit are integrated, occupying a small space, and have high processing efficiency. The utility room and the processing unit are integrated, and the assembly is convenient. The invention has better environmental protection management ability, more innovative technical level and stronger economic benefits.

The treatment and recovery unit 2 includes a regulating pool 21, a reaction pool 22, a network breaking pool 23, a coagulation sedimentation pool, an intermediate pool 27, a membrane filtration pool 28, and an outlet pool 29 for sequentially treating wastewater. The dosing room 31, the glue room 32, the power distribution room 33 and the automatic control room 34, the regulating pool 21, the reaction pool 22, the network breaking pool 23, the coagulation sedimentation pool, the intermediate pool 27, the membrane filtration pool 28 and the outlet pool 29 are provided with communicating waterways, and a plurality of diversion units 210 are respectively arranged in the regulating pool 21 , the reaction pool 22 and the collateral breaking pool 23 .

During the specific implementation of this application, the regulating pool is used to collect nickel-containing wastewater. The purpose of setting the regulating pool is to adjust the water volume and water quality evenly, to ensure the homogenization of the water volume and water quality of subsequent wastewater, and to improve the treatment efficiency of the system;

Design size: L*B*H＝6*4*2.5(m)

Residence time: 4h.

During the specific implementation of the present application, sodium hydroxide solution is added to the reaction tank to control the pH range of 8 to 9 in the tank, so that nickel ions can be removed from the wastewater by generating nickel hydroxide precipitates;

Design size: L*B*H＝6*4*2.5(m)

Residence time: 4h.

Preferably, the coagulation-sedimentation tank includes a coagulation tank 24, a flocculation tank 25 and a sedimentation tank 26 for sequentially treating wastewater, and a Connected waterways.

Preferably, the reaction tank 22 , the decollation tank 23 , the coagulation tank 24 and the flocculation tank 25 are all equipped with agitators.

Preferably, the settling tank adopts a back-to-back sinking type.

During the specific implementation of this application, continue to add sodium hydroxide solution in the network breaking tank, control the pH range of the tank to 10-11, then add NaS solution and FeSO4 solution, so that the complexed nickel is broken, and nickel sulfide precipitates are generated and removed from the waste water .

Design size: L*B*H＝6*4*2.5(m)

Residence time: 4h.

When the present application is implemented specifically, the coagulation sedimentation tank: PAC solution is added under partial acidic-neutral conditions, so that colloids and fine suspended particles in the water are coagulated to generate alum flowers, and PAM (polyacrylamide) is added to aid coagulation to improve the alum flowers Structure, improve settlement performance;

Design size:

Coagulation tank: L*B*H＝6*0.33*2.5(m), residence time: 0.5h

Flocculation tank: L*B*H＝6*0.33*2.5(m), residence time: 0.5h

Sedimentation tank: L*B*H=5*4*2.5(m), residence time: 5h.

Preferably, a UF membrane system, a security filter and an RO membrane system for sequentially treating wastewater are arranged in the membrane filtration pool.

Preferably, the UF membrane system includes a UF membrane, a fouling agent adding device and an activated carbon filter arranged in sequence, for removing suspended particles, microorganisms such as bacteria, small molecule organic matter and residual chlorine impurities in water.

Preferably, the RO membrane system includes an RO membrane, a circulation concentration device and an advanced treatment device, which is pumped into the circulation concentration device by a high-pressure pump, and enters the advanced treatment device after removing tiny organic impurities.

Preferably, the water production flux of the UF membrane system is 1.5-4.0 m3/h, and the UF membrane is made of polyvinylidene fluoride.

Preferably, the flux of the RO membrane system: 10.5m3/d branch, the salt rejection rate: ≥99.5%, and the RO membrane is a polyamide composite membrane.

Preferably, the circulation concentration device adopts a single-stage reverse osmosis circulation concentration device, and the advanced treatment device adopts ion exchange resin for advanced treatment.

Preferably, the processing and recovery unit and the functional unit are integrated.

When the application was specifically implemented, the specific working method of the membrane filter tank was as follows:

Enter the pretreatment system composed of UF membrane system, antiscalant adding device, activated carbon filter and security filter in order to fully remove suspended particles, bacteria and other microorganisms, small molecular organic matter and residual chlorine and other impurities in the water, so that the pretreated water can meet the Reverse osmosis feed water requirements to prevent membrane fouling and concentrated water scaling on one side of the RO membrane, and then pumped into a single-stage reverse osmosis circulation concentration system by a high-pressure pump to further remove smaller organic impurities. The permeate is further treated by the subsequent ion exchange resin and used as workshop reuse water.

In the specific implementation of this application, the process flow of an integrated device for the treatment and reuse of nickel-containing electroplating wastewater is as follows: water inlet→adjustment tank→reaction tank→broken network→coagulation, flocculation→sedimentation tank→intermediate tank→membrane Filter pool (UF→security filter→RO)→outlet pool, the water out of the pool is used as workshop reuse water. It not only solves the problem of nickel-containing wastewater treatment, but also purifies the wastewater into recycled water for use in the production line, so as to save water and recycle water resources. The functional unit and the recovery treatment unit are integrally formed, which is easy to assemble. The interior of the pool body is separated and drained by the diversion wall, which optimizes the hydraulic head loss, increases the effective residence time, and improves the reaction treatment efficiency.

The above description is only a preferred embodiment of the present application and an illustration of the applied technical principle. Those skilled in the art should understand that the scope of disclosure involved in this application is not limited to the technical solutions formed by the specific combination of the above technical features, but also covers the technical solutions made by the above technical features or Other technical solutions formed by any combination of equivalent features. For example, a technical solution formed by replacing the above-mentioned features with technical features with similar functions disclosed in this application (but not limited to).

The above-mentioned embodiments only illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Anyone skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in the present invention should still be covered by the claims of the present invention.

Claims (10)

1. An integrated device for nickel-containing electroplating wastewater treatment and reuse, characterized in that it includes a body, the body includes a treatment recovery unit and a functional unit arranged in parallel, and the treatment recovery unit includes an adjustment pool for sequential treatment of wastewater , a reaction pool, a network breaking pool, a coagulation sedimentation pool, an intermediate pool, a membrane filtration pool, and an outlet pool. The functional unit includes a dosing room, a glue machine room, a power distribution room, and an automatic control room arranged in sequence. The regulating pool, The reaction tank, the network breaking tank, the coagulation sedimentation tank, the intermediate water tank, the membrane filtration tank and the outlet pool are provided with communicating waterways, and a plurality of diversion units are respectively arranged in the regulation tank, the reaction tank and the network breaking tank. 2. A kind of nickel-containing electroplating wastewater treatment and reuse integrated device according to claim 1, wherein the coagulation sedimentation tank comprises a coagulation tank, a flocculation tank and a sedimentation tank for sequentially treating wastewater, and the The coagulation tank, the flocculation tank and the sedimentation tank are provided with a communicating waterway. 3. An integrated device for treating and reusing nickel-containing electroplating wastewater according to claim 1, characterized in that, agitators are arranged in the reaction pool, the network breaking pool, the coagulation pool and the flocculation pool. 4. An integrated device for treating and recycling nickel-containing electroplating wastewater according to claim 1, wherein a UF membrane system, a security filter and an RO membrane system for sequentially treating wastewater are arranged in the membrane filtration tank. 5. A kind of nickel-containing electroplating wastewater treatment and recycling integrated device according to claim 4, characterized in that, the UF membrane system comprises a UF membrane arranged in sequence, a negative scale agent device and an activated carbon filter for Remove suspended particles, bacteria and other microorganisms, small molecular organic matter and residual chlorine impurities in water. 6. A nickel-containing electroplating wastewater treatment and reuse integrated device according to claim 4, characterized in that the RO membrane system includes RO membranes, circulation concentration devices and advanced treatment devices, which are pumped into the The circulating concentration device enters the advanced treatment device after removing tiny organic impurities. 7. An integrated device for nickel-containing electroplating wastewater treatment and reuse according to claim 4, characterized in that, the water production flux of the UF membrane system is 1.5-4.0m3/h, and the material of the UF membrane is Made of polyvinylidene fluoride. 8. An integrated device for nickel-containing electroplating wastewater treatment and reuse according to claim 4, characterized in that the flux of the RO membrane system: 10.5m3/d branch, desalination rate: ≥99.5%, The RO membrane is a polyamide composite membrane. 9. An integrated device for treating and reusing nickel-containing electroplating wastewater according to claim 6, characterized in that, the circulation concentration device adopts a single-stage reverse osmosis circulation concentration device, and the advanced treatment device adopts an ion exchange resin Deep processing. 10 . The integrated device for treating and recycling nickel-containing electroplating wastewater according to claim 1 , wherein the treatment and recovery unit and the functional unit are integrated. 11 .

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