CN115057577A - Zero discharge system equipment of electroplating effluent that becomes more meticulous - Google Patents
Zero discharge system equipment of electroplating effluent that becomes more meticulous Download PDFInfo
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- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
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- C02F2209/16—Total nitrogen (tkN-N)
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- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Abstract
The invention belongs to the technical field of electroplating wastewater treatment, and particularly discloses refined electroplating wastewater zero-discharge system equipment, which comprises an electroplating production line, an electroplating wastewater raw water storage tank, a CPA (continuous anaerobic continuous aeration) physicochemical precipitation system, a plate-frame filter press, a press-filtered underwater transfer tank, an MVR (mechanical vapor recompression) evaporation system, an evaporated underwater transfer tank, an HPBS (high pressure methane-butadiene-styrene) biochemical system, a biochemical effluent transfer tank, an RO (reverse osmosis) system and a reuse water storage tank; the invention is a complete set of equipment consisting of a CPA physical and chemical precipitation system, an MVR evaporation system, an HPBS biochemical system, an RO reverse osmosis system and the like, and has the advantages of low equipment manufacturing cost, low running cost, high process automation degree, small occupied area and stable running.
Description
Technical Field
The invention relates to the technical field of electroplating wastewater treatment, in particular to a refined electroplating wastewater zero-discharge system device.
Background
The conventional electroplating wastewater treatment apparatus has the following problems:
(1) the construction price of the zero-discharge equipment for treating more than 50 tons of electroplating wastewater per day is between 12 ten thousand yuan and 15 ten thousand yuan per ton, and the equipment cost is high;
(2) the inclined tube sedimentation system is used for continuously adding the medicine, the medicine can not be accurately added, the excessive medicine adding condition is often generated, the using amount of the medicine is large, and the treatment cost is high;
(3) the inclined tube sedimentation system excessively adds drugs, or uses a large amount of lime for clarifying water quality and reducing drug cost, but generates a large amount of sludge, and the sludge treatment generates high cost;
(4) the common electroplating wastewater treatment and reuse equipment adopts a large water tank, adopts plane arrangement and occupies a large area;
(5) the system has no complete set of automatic software control operation equipment, needs more operators and has high labor intensity;
(6) heavy metals such as copper, nickel and the like in the electroplating wastewater are chelated by a strong complex, and complete complex breaking is difficult to be performed by adopting a heavy metal capture agent and a complex breaking agent, so that the electroplating wastewater can not stably reach the national standard electroplating pollutant discharge standard and can not stably reach the standard discharge standard by adopting processes such as an inclined tube precipitation method, a resin adsorption method, a biochemical method and the like.
Disclosure of Invention
The invention aims to provide refined electroplating wastewater zero-discharge system equipment to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a refined electroplating wastewater zero-discharge system device comprises an electroplating production line, an electroplating wastewater raw water storage tank, a CPA physicochemical precipitation system, a plate and frame filter press, a press-filtering underwater transfer tank, an MVR evaporation system, a evaporated underwater transfer tank, an HPBS biochemical system, a biochemical effluent transfer tank, an RO reverse osmosis system and a reuse water storage tank;
the electroplating production line is connected with an electroplating wastewater raw water storage tank;
the electroplating wastewater raw water storage tank is connected with the CPA physical and chemical precipitation system;
the CPA physical and chemical precipitation system is connected with the filter-pressing effluent transfer tank and is connected with the plate-and-frame filter press through a mud water tank;
the plate-frame filter press is connected with a filter-pressing effluent transfer tank;
the pressure filtration water transfer tank is connected with the MVR evaporation system;
the MVR evaporation system is connected with the evaporation effluent transfer tank;
the evaporation underwater rotating tank is connected with an HPBS biochemical system provided with a BWS biological rotating disk;
the HPBS biochemical system is connected with the biochemical effluent transfer tank;
the biochemical effluent rotary tank is connected with an RO reverse osmosis system;
the RO reverse osmosis system is connected with the reuse water storage tank;
the recycled water storage tank is connected with the electroplating production line.
Preferably, the electroplating production line is used for completing electroplating equipment used in an industrial product electroplating process, and is connected with an electroplating wastewater raw water storage tank through a PVC flange, a centrifugal pump and a PVC pipeline; the electroplating wastewater raw water storage tank is used for collecting and storing electroplating wastewater raw water, and is connected with the CPA physical and chemical precipitation system through a PVC flange, a centrifugal pump and a PVC pipeline.
Preferably, the CPA physical and chemical precipitation system is elaborately designed for the physical and chemical precipitation treatment of the electroplating wastewater, automatically operates by adopting an intelligent microcomputer to control the degree, and automatically controls and adds certain medicaments mainly aiming at heavy metal ions and acidity in the electroplating wastewater, so that the whole treatment process is accurately fed with medicaments, and excessive medicaments are not added; the CPA materialization precipitation system is connected with the filter-pressing water outlet transfer tank through a PVC flange, a centrifugal pump and a PVC pipeline, and the CPA materialization precipitation system is connected with the mud water tank through a PVC flange, a pneumatic diaphragm pump, a flexible connection and a PVC pipeline.
Preferably, the muddy water tank is used for storing lower layer muddy water generated by the CPA materialization and precipitation system, and is connected with the plate and frame type filter press through a PVC flange, a pneumatic diaphragm pump, a flexible connection and a PVC pipeline.
Preferably, the frame filter press is used for carrying out solid-liquid separation on mud and water to generate precipitated sludge and filtrate; the plate-frame filter press has the functions of automatically pulling plates, conveying sludge by belt pulleys and automatically accumulating liquid and turning plates, and can start full-automatic sludge unloading by one key; the plate-and-frame filter press is connected with the filter-press water outlet transfer tank through a rubber hose, a stainless steel overflow groove, a PVC flange and a PVC pipeline.
Preferably, the filter-pressing water in-transit tank is a PC storage tank for transferring wastewater, and the filter-pressing water out-transit tank is connected with the MVR evaporation system through a PVC flange, a centrifugal pump, a PVC pipeline and a biphase stainless steel pipeline.
Preferably, the MVR evaporation system provides steam through a steam generator, and the steam generator is connected with the MVR evaporation system through a stainless steel flange, a stainless steel pipeline and an electromagnetic valve; the MVR evaporation system is connected with the evaporation effluent transfer tank through a duplex stainless steel centrifugal pump, a duplex stainless steel automatic regulating valve and a duplex stainless steel pipeline, the MVR evaporation system is further connected with a centrifugal machine through the duplex stainless steel centrifugal pump, the duplex stainless steel automatic regulating valve and the duplex stainless steel pipeline, the centrifugal machine selects a horizontal spiral pushing centrifugal machine, solid particles in suspension are separated from liquid through a laser screen by utilizing centrifugal force, and crystallized sludge and filtrate are separated.
Preferably, the evaporation effluent transfer tank is used for transferring and storing evaporated effluent, and the evaporation effluent transfer tank is connected with an HPBS biochemical system provided with a BWS biological rotating disc through a PVC flange, a centrifugal pump and a PVC pipeline.
Preferably, the BWS biological rotating disk is connected with the HPBS biochemical tank system through a gear, a cast iron base, a stainless steel shaft sleeve and a variable speed motor; the HPBS biochemical tank system is connected with the biochemical effluent transfer tank through a PVC flange, a centrifugal pump and a PVC pipeline; the biochemical effluent water transfer tank is used for storing and transferring biochemical effluent water and is connected with the RO reverse osmosis system through a PVC flange, a centrifugal pump and a PVC pipeline.
Preferably, the RO reverse osmosis system is connected with a reuse water storage tank through a PVC flange, a centrifugal pump and a PVC pipeline, the reuse water storage tank stores the reuse water treated by the CPA physicochemical precipitation system, the MVR evaporation system, the HPBS biochemical system and the RO reverse osmosis system, and the reuse water is reused for preparing tank liquor for the electroplating production line and is used as cleaning water; the recycled water storage tank is connected with the electroplating production line electroplating bath and the cleaning tank through a PVC flange, a centrifugal pump and a PVC pipeline.
Compared with the prior art, the invention has the beneficial effects that:
the invention is a complete set of equipment consisting of a CPA physical and chemical precipitation system, an MVR evaporation system, an HPBS biochemical system and an RO reverse osmosis system, and has the advantages of low equipment manufacturing cost, low running cost, high process automation degree, small occupied area and stable running; this equipment can be fit for being applied to the preliminary treatment of multiple different kind waste water, and with the contrast of traditional pipe chute sedimentation system, equipment cost reduces by a wide margin, and this equipment adopts 2205 duplex stainless steel material, replaces the titanium material, and through long-term operation affirmation, greatly reduced cost. The front end of an MVR evaporation system which is a component of the equipment adopts falling film evaporation, and the rear end adopts forced evaporation. The pretreatment CPA materialization system ensures the water inlet stability of the MVR evaporation system. Because the falling film evaporation technology at the front end can compress the evaporation cost to about 20 yuan per ton, the technology can reduce the operation cost by more than 30 percent, greatly improve the product competitiveness and reduce the cost pressure of electroplating enterprises caused by environmental protection. The CPA system equipment based on the equipment has the advantages of fast water inlet, common use of a device for various waste water, greatly reduced floor area and particular suitability for old plant transformation. The convenient condition is created for the reconstruction of the produced electroplating plant, and the water treatment system can be better adapted to the field; the automatic degree of sliding of this equipment is high, has improved whole security when reducing the cost of labor, reducing intensity of labour, and water and outside carry out all-round control and detection, and the engineer can direct long-range and on-the-spot video conversation of operating personnel and system. And remote alarm can be carried out when the field problem occurs.
Drawings
FIG. 1 is a process flow diagram of a refined electroplating wastewater zero-discharge system device;
FIG. 2 is a block process flow chart of the equipment of the refined electroplating wastewater zero-discharge system.
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.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1-2, the present invention provides a technical solution: a refined electroplating wastewater zero-discharge system device comprises an electroplating production line, an electroplating wastewater raw water storage tank, a CPA physicochemical precipitation system, a plate and frame filter press, a press-filtering underwater transfer tank, an MVR evaporation system, a evaporated underwater transfer tank, an HPBS biochemical system, a biochemical effluent transfer tank, an RO reverse osmosis system and a reuse water storage tank;
the electroplating production line is connected with an electroplating wastewater raw water storage tank;
the electroplating wastewater raw water storage tank is connected with the CPA physical and chemical precipitation system;
the CPA physical and chemical precipitation system is connected with the filter-pressing effluent transfer tank and is connected with the plate-and-frame filter press through a mud water tank;
the plate-frame filter press is connected with a filter-pressing effluent transfer tank;
the pressure filtration water transfer tank is connected with the MVR evaporation system;
the MVR evaporation system is connected with an evaporation water discharge transfer tank;
the evaporation underwater rotating tank is connected with an HPBS biochemical system provided with a BWS biological rotating disk;
the HPBS biochemical system is connected with the biochemical effluent transfer tank;
the rotary tank in the biochemical effluent is connected with an RO reverse osmosis system;
the RO reverse osmosis system is connected with the reuse water storage tank;
the recycled water storage tank is connected with the electroplating production line.
Furthermore, the electroplating production line is used for completing electroplating equipment used in an industrial product electroplating process, is connected with the electroplating wastewater raw water storage tank through a PVC flange, a centrifugal pump, a PVC pipeline and the like, and pumps the electroplating wastewater to the electroplating wastewater raw water storage tank for storage. The equipment adopts a liquid level controller and a PLC program to automatically control the starting and the closing of the centrifugal pump to collect the electroplating wastewater in the running process.
Furthermore, the electroplating wastewater raw water storage tank is used for collecting and storing electroplating wastewater raw water, is connected with the CPA physical and chemical precipitation system through a PVC flange, a centrifugal pump, a PVC pipeline and the like, and pumps the electroplating wastewater to the CPA physical and chemical precipitation system for treatment. The equipment operation process adopts a liquid level controller and a PLC program to automatically control the starting and the closing of the transfer electroplating wastewater of the centrifugal pump.
Furthermore, the CPA physical and chemical precipitation system is elaborately designed aiming at the physical and chemical precipitation treatment of the electroplating wastewater, and automatically operates by adopting an intelligent microcomputer to control the degree. The equipment adopts carbon steel plastic material, conical shape, and intermittent treatment method, the maximum tank body can feed water 30 cubic meters each time, and the maximum treatment flow can be 30 cubic meters per hour. The equipment is internally provided with PH, total nickel, total copper, total chromium and other on-line detection instruments for testing the wastewater, and the varieties and dosage of the medicament required by the physical and chemical precipitation are determined according to different wastewater qualities through an intelligent microcomputer control program. Mainly aiming at heavy metal ions and acidity in the electroplating wastewater, certain agents (ferric salt, sodium hydroxide, a decomplexer, PAC, PAM and the like) are automatically controlled and added, the whole treatment process is accurate in dosing, and excessive dosing is avoided; the processes of adsorption concentration, precipitation, filtration and the like to metal ions greatly reduce heavy metal ions, conductivity, COD, ammonia nitrogen, total phosphorus and the like in the wastewater. After the electroplating wastewater enters a CPA physical and chemical precipitation system, the main chemical reactions are as follows:
Ni 2+ +2OH - →Ni(OH) 2 ↓
Cu 2+ +2OH - →Cu(OH) 2 ↓
Cr 3+ +3OH - →Cr(OH) 3 ↓
the CPA materialization precipitation system is connected with the filter-pressing water outlet transit tank through a PVC flange, a centrifugal pump, a PVC pipeline and the like, and the CPA materialization precipitation system is connected with the mud water tank through a PVC flange, a pneumatic diaphragm pump, a flexible connection, a PVC pipeline and the like. The device operation process adopts liquid level controller and PLC program automatic control to start, close centrifugal pump transfer sediment's supernatant, adopts liquid level inductor, solenoid valve and PLC program automatic control to start, close pneumatic diaphragm pump transfer sediment's muddy water.
Supernatant fluid: adding a medicament into electroplating wastewater in a CPA physical and chemical precipitation system, stirring, carrying out physical and chemical reactions, flocculating and precipitating, and standing to generate upper clear water.
A mud water tank: storing the lower layer muddy water generated by the CPA physical and chemical precipitation system. The connection mode is as follows: the mud water tank is connected with the plate-and-frame filter press by adopting a PVC flange, a pneumatic diaphragm pump, a flexible connection, a PVC pipeline and the like. The operation process of the equipment adopts a liquid level sensor, an electromagnetic valve and a PLC program to automatically control the start and the stop of the pneumatic diaphragm pump for transferring muddy water.
Further, when the frame filter press is used, mud water passes through a pressing plate of the frame filter press and filter cloth of 250-350 meshes, and is subjected to solid-liquid separation under the condition that the pressure is increased to 0.3-0.6 MPa, so that precipitated sludge and clear filtrate are produced. The plate-and-frame filter press has the functions of automatic pulling plates, belt pulley sludge transportation and automatic accumulated liquid turning plates, and can start full-automatic sludge unloading by one key. The connection mode is as follows: the plate-and-frame filter press is connected with a filter-press effluent transfer tank by adopting a rubber hose, a stainless steel overflow groove, a PVC flange, a PVC pipeline and the like. The operation process of the equipment adopts a liquid level sensor, an electromagnetic valve and a PLC program to automatically control the start and the stop of the pneumatic diaphragm pump for transferring muddy water.
Filtrate: is clear water pressed by a plate-and-frame filter press and filtrate centrifugally thrown out by a centrifugal machine.
Sludge precipitation: the sludge is produced by extruding muddy water at the pressure of 0.3-0.6 MPa through a plate-and-frame filter press, and is disposed outside the commission of qualified hazardous waste enterprises.
Further, the press filtration underwater transfer tank is a PE storage tank for transferring waste water. The connection mode is as follows: the pressure filtration water transferring tank is connected with the MVR evaporation system by adopting a PVC flange, a centrifugal pump, a PVC pipeline, a 2205 duplex stainless steel pipeline and the like. The equipment operation process adopts a liquid level controller and a PLC program to automatically control the starting and the closing of the centrifugal pump for transferring the wastewater.
Furthermore, the MVR evaporation system provides steam through a steam generator, the steam generator is connected with the MVR evaporation system through a stainless steel flange, a stainless steel pipeline and an electromagnetic valve, and the automatic pressure controller and the automatic temperature controller are adopted to automatically control the starting and closing of the electromagnetic valve in the running process of the equipment so as to provide steam for the MVR evaporation system; the MVR evaporation system is designed for evaporating electroplating wastewater pertinence, selects 2205 duplex stainless steel materials which can resist the corrosion of the electroplating wastewater at 65-95 ℃ and reduce the equipment cost, and simultaneously has novel integrated equipment of falling film evaporation and forced evaporation systems. The MVR evaporation system is the current internationally leading high-efficiency energy-saving evaporation system, and the principle is that secondary steam generated by evaporation is pressurized and heated through a compressor, the enthalpy of the steam is improved and is used as a heat source to heat materials, so that cyclic evaporation is realized, hot water obtained by condensation exchanges heat with raw materials, heat is further recovered, the latent heat is fully utilized, the evaporation energy consumption is greatly reduced, and the operation cost is remarkably saved. The main part of forced circulation evaporative crystallizer is FC (forced circulation) type crystallizer, which is composed of heat exchanger, separation chamber, circulation pipe, forced circulation pump, condenser, pipeline valve fittings, etc.; the MVR evaporation system is connected with the evaporation water transfer tank through a two-phase stainless steel centrifugal pump, a two-phase stainless steel automatic regulating valve and a two-phase stainless steel pipeline, and is further connected with a centrifugal machine through the two-phase stainless steel centrifugal pump, the two-phase stainless steel automatic regulating valve, the two-phase stainless steel pipeline and the like. The device adopts a liquid level controller, a density automatic controller, a temperature automatic controller and a PLC program to automatically control the starting and the closing of the transfer wastewater of the 2205 duplex stainless steel centrifugal pump in the running process; the centrifugal machine is a horizontal spiral material-pushing centrifugal machine made of 2205 duplex stainless steel, solid particles in suspension are separated from liquid through a laser screen by using centrifugal force, and crystallized sludge and filtrate are separated. The device adopts a liquid level controller, a density automatic controller, a temperature automatic controller and a PLC program to automatically control the starting and the closing of the 2205 duplex stainless steel centrifugal pump for transferring and evaporating the emulsion containing the crystallized particles in the process of running.
Crystallizing sludge: evaporating and concentrating the electroplating wastewater to obtain emulsion containing crystallized particles, and centrifuging the produced sludge containing crystallized salt by using a centrifuge until qualified dangerous waste enterprises dispose outside the commission.
Furthermore, the evaporation effluent transfer tank is used for transferring and storing the evaporated effluent and is made of PE materials. The evaporated water transfer tank is connected with an HPBS biochemical system provided with a BWS biological rotating disc through a PVC flange, a centrifugal pump, a PVC pipeline and the like, and the evaporated water is pumped into the biochemical system for biodegradation. The running process of the equipment adopts a liquid level controller and a PLC program to automatically control the starting and the closing of the centrifugal pump for transferring and evaporating the effluent water.
Furthermore, the BWS biological rotating disc PP material is internally provided with biological fillers and German imported aerobic and anaerobic strains, and efficiently degrades COD, ammonia nitrogen and nitrate nitrogen in the wastewater. The BWS biological rotating disc is connected with the HPBS biochemical tank system through a gear, a cast iron base, a stainless steel shaft sleeve and a variable speed motor, the BWS biological rotating disc is driven to rotate by the variable speed motor in the operation process of the equipment, and the BWS biological rotating disc is contacted and stirred with the wastewater in the biochemical tank to carry out biodegradation on COD, ammonia nitrogen and nitrate nitrogen in the wastewater.
Furthermore, the HPBS biochemical tank system is a water purifying device which is designed according to the characteristics of the electroplating wastewater after evaporation. The HPBS biochemical tank system comprises a tank body, a precise gas explosion system, a filler bearing system, a flow guide port, a discharge port and the like. The modular design, the full open pipe structure, simple to operate can be fit for different region occasions. Adopts high-quality imported PP sheet material, is suitable for long-term use of water treatment projects. The biological strain is an aerobic and anaerobic strain imported from Germany. When the wastewater enters the HPBS biochemical tank system, the heavy metal content of the water body cannot be too high, and simultaneously the water inlet index of the HPBS biochemical tank system reaches the requirement that the conductivity is less than 8000 mu s/cm. After CPA physical and chemical precipitation and MVR system evaporation treatment, heavy metal ions and electric conductivity can both meet the biochemical requirement. The connection mode is as follows: the HPBS biochemical tank is connected with the biochemical effluent transfer tank by adopting a PVC flange, a centrifugal pump, a PVC pipeline and the like. The equipment operation process adopts a liquid level controller and a PLC program to automatically control the starting and the closing of the centrifugal pump for transferring the biochemical effluent.
Furthermore, the biochemical effluent transfer tank is used for storing and transferring biochemical effluent and is made of PE materials. The connection mode is as follows: the biochemical effluent storage tank is connected with the RO reverse osmosis system by adopting a PVC flange, a centrifugal pump, a PVC pipeline and the like. The equipment operation process adopts a liquid level controller and a PLC program to automatically control the starting and the closing of the centrifugal pump for transferring the biochemical effluent.
Furthermore, the conductivity of the fresh water produced by the RO reverse osmosis system can reach below 100 mu s/cm, and the requirement of reuse water of an electroplating production line is met; the RO reverse osmosis system is connected with a reuse water storage tank through a PVC flange, a centrifugal pump and a PVC pipeline, the reuse water storage tank stores reuse water treated by the CPA physicochemical precipitation system, the MVR evaporation system, the HPBS biochemical system and the RO reverse osmosis system, and the reuse water is reused for preparing tank liquor for an electroplating production line and is used as cleaning water; reverse osmosis can remove bacteria, viruses, colloids, organic matters and more than 98.6 percent of soluble roots in water. The method has the characteristics of low operation cost, simple operation, high automation degree, stable effluent quality and the like, has obvious superiority compared with other traditional water treatment methods, and is widely applied to water treatment related industries. Osmosis is a physical phenomenon in which, when two solutions containing different concentrations of species are separated by a semipermeable membrane, it is found that the solvent on the side with a low content of the species spontaneously flows toward the side with a high content of the species, and this process is called osmosis. The permeation is stopped until the difference between the liquid levels (i.e., the pressure difference) on both sides reaches equilibrium, and the pressure difference is called the osmotic pressure. The osmotic pressure is dependent only on the type of solution, the root concentration and the temperature, and not on the semipermeable membrane. In general, the higher the root concentration, the higher the osmotic pressure. Conversely, if a pressure is applied to the concentrate side that exceeds the osmotic pressure, the solvent in the concentrate side will permeate under pressure to the fresh water side, which is called reverse osmosis (ReverseOsmosis) because it is opposite to natural osmosis. The reverse osmosis membrane separation technology is a method for separating solute and solvent by using the reverse osmosis principle. The diaphragm is a composite structure and comprises three layers:
a polyester material reinforced nonwoven fabric about 120 μm thick; a polysulfone material porous intermediate support layer about 40 μm thick; ultra-thin, separate layers of polyamide material, about 0.2 μm thick.
The primary structural strength of the composite membrane is provided by the non-woven fabric, which has a smooth surface that is hard and free of loose fibers.
The reason for designing the porous intermediate support structure is that when the ultra-thin separation layer is directly combined on the non-woven fabric, the surface is too irregular and the pores are too large, so that it is necessary to coat a layer of highly water permeable microporous polysulfone as a support layer on the non-woven fabric in advance, and the pore diameter is about 150 angstroms.
Each layer is optimally designed and manufactured according to the functional requirements, and the ultrathin separation layer is a functional layer which really has a separation effect in the reverse osmosis process. The reverse osmosis system comprises a high-pressure pump, a reverse osmosis membrane group, a cleaning system and a control instrument part.
Furthermore, the reuse water storage tank is used for storing reuse water treated by the CPA physicochemical precipitation system, the MVR evaporation system, the HPBS biochemical system and the RO reverse osmosis system, and reusing the reuse water for preparing tank liquor for the electroplating production line and using the reuse water as cleaning water. The connection mode is as follows: the reclaimed water storage tank is connected with the electroplating tank and the cleaning tank of the electroplating production line by adopting a PVC flange, a centrifugal pump, a PVC pipeline and the like. The device adopts a liquid level controller and a PLC program to automatically control the start and the stop of the transfer reuse water in the centrifugal pump in the running process.
It is worth noting that: the whole device realizes control over the device through the master control button, and the device matched with the control button is common equipment, belongs to the existing mature technology, and is not repeated for the electrical connection relation and the specific circuit structure.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A refined electroplating wastewater zero discharge system device is characterized by comprising an electroplating production line, an electroplating wastewater raw water storage tank, a CPA physical and chemical precipitation system, a plate and frame filter press, a press-filtering underwater transfer tank, an MVR evaporation system, a evaporated underwater transfer tank, an HPBS biochemical system, a biochemical effluent transfer tank, an RO reverse osmosis system and a reuse water storage tank;
the electroplating production line is connected with an electroplating wastewater raw water storage tank;
the electroplating wastewater raw water storage tank is connected with the CPA physical and chemical precipitation system;
the CPA physical and chemical precipitation system is connected with the filter-pressing effluent transfer tank and is connected with the plate-and-frame filter press through a mud water tank;
the plate and frame filter press is connected with a filter pressing water outlet transit tank;
the pressure filtration water transfer tank is connected with the MVR evaporation system;
the MVR evaporation system is connected with the evaporation effluent transfer tank;
the evaporation underwater rotating tank is connected with an HPBS biochemical system provided with a BWS biological rotating disk;
the HPBS biochemical system is connected with the biochemical effluent transfer tank;
the biochemical effluent rotary tank is connected with an RO reverse osmosis system;
the RO reverse osmosis system is connected with the reuse water storage tank;
the recycled water storage tank is connected with the electroplating production line.
2. The zero discharge system equipment for refined electroplating wastewater according to claim 1, wherein the equipment comprises: the electroplating production line is used for completing electroplating equipment used in an industrial product electroplating process, and is connected with an electroplating wastewater raw water storage tank through a PVC flange, a centrifugal pump and a PVC pipeline; the electroplating wastewater raw water storage tank is used for collecting and storing electroplating wastewater raw water, and is connected with the CPA physical and chemical precipitation system through a PVC flange, a centrifugal pump and a PVC pipeline.
3. The equipment of claim 1, wherein the equipment comprises: the CPA physical and chemical precipitation system automatically operates by adopting an intelligent microcomputer to control the degree, and is mainly used for automatically controlling and adding a certain medicament aiming at heavy metal ions and acidity in the electroplating wastewater; the CPA materialization precipitation system is connected with the filter-pressing water outlet transfer tank through a PVC flange, a centrifugal pump and a PVC pipeline, and the CPA materialization precipitation system is connected with the mud water tank through a PVC flange, a pneumatic diaphragm pump, a flexible connection and a PVC pipeline.
4. The equipment of claim 1, wherein the equipment comprises: the mud water tank is used for storing lower layer mud water generated by the CPA physicochemical precipitation system, and is connected with the plate-and-frame filter press through a PVC flange, a pneumatic diaphragm pump, a flexible connection and a PVC pipeline.
5. The equipment of claim 1, wherein the equipment comprises: the frame type filter press is used for carrying out solid-liquid separation on mud and water to generate precipitated sludge and filtrate; the plate-frame filter press has the functions of automatically pulling plates, conveying sludge by belt pulleys and automatically accumulating liquid and turning plates, and can start full-automatic sludge unloading by one key; the plate-and-frame filter press is connected with the filter-press water outlet transfer tank through a rubber hose, a stainless steel overflow groove, a PVC flange and a PVC pipeline.
6. The equipment of claim 1, wherein the equipment comprises: the filter-pressing water in-transit tank is a PC storage tank for transferring wastewater, and the filter-pressing water out-transit tank is connected with the MVR evaporation system through a PVC flange, a centrifugal pump, a PVC pipeline and a duplex stainless steel pipeline.
7. The equipment of claim 1, wherein the equipment comprises: the MVR evaporation system provides steam through a steam generator, and the steam generator is connected with the MVR evaporation system through a stainless steel flange, a stainless steel pipeline and an electromagnetic valve; the MVR evaporation system is connected with the evaporation effluent transfer tank through a duplex stainless steel centrifugal pump, a duplex stainless steel automatic regulating valve and a duplex stainless steel pipeline, the MVR evaporation system is further connected with a centrifugal machine through the duplex stainless steel centrifugal pump, the duplex stainless steel automatic regulating valve and the duplex stainless steel pipeline, the centrifugal machine selects a horizontal spiral pushing centrifugal machine, solid particles in suspension are separated from liquid through a laser screen by utilizing centrifugal force, and crystallized sludge and filtrate are separated.
8. The equipment of claim 1, wherein the equipment comprises: the evaporation water outlet transfer tank is used for transferring and storing evaporated water, and is connected with an HPBS biochemical system provided with a BWS biological rotating disk through a PVC flange, a centrifugal pump and a PVC pipeline.
9. The equipment of claim 1, wherein the equipment comprises: the BWS biological rotating disk is connected with the HPBS biochemical tank system through a gear, a cast iron base, a stainless steel shaft sleeve and a variable speed motor; the HPBS biochemical tank system is connected with the biochemical effluent transfer tank through a PVC flange, a centrifugal pump and a PVC pipeline; the biochemical effluent water transfer tank is used for storing and transferring biochemical effluent water and is connected with the RO reverse osmosis system through a PVC flange, a centrifugal pump and a PVC pipeline.
10. The equipment of claim 1, wherein the equipment comprises: the RO reverse osmosis system is connected with a reuse water storage tank through a PVC flange, a centrifugal pump and a PVC pipeline, the reuse water storage tank stores reuse water treated by the CPA physicochemical precipitation system, the MVR evaporation system, the HPBS biochemical system and the RO reverse osmosis system, and the reuse water is reused for preparing tank liquor for an electroplating production line and is used as cleaning water; the recycled water storage tank is connected with the electroplating production line electroplating bath and the cleaning tank through a PVC flange, a centrifugal pump and a PVC pipeline.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180148350A1 (en) * | 2016-11-29 | 2018-05-31 | China Petroleum & Chemical Corporation | Method and System for Treating Brine Waste Water |
| CN215161935U (en) * | 2021-04-06 | 2021-12-14 | 上海衡洁环保科技有限公司 | MVR evaporation treatment zinc-nickel waste water system equipment |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180148350A1 (en) * | 2016-11-29 | 2018-05-31 | China Petroleum & Chemical Corporation | Method and System for Treating Brine Waste Water |
| CN215161935U (en) * | 2021-04-06 | 2021-12-14 | 上海衡洁环保科技有限公司 | MVR evaporation treatment zinc-nickel waste water system equipment |
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| 上海衡洁环保科技有限公司官网: "电镀废水如何解决中水回用的问题", Retrieved from the Internet <URL:http://www.banenvir.com/ddhh.html> * |
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