CN202492400U - Iron-copper micro-electrolysis reaction tank - Google Patents

Abstract

The utility model relates to a preparation method of an iron-copper micro-electrolysis reaction tank and a copper-plated wire mesh plate. The device is provided with a water inlet chamber and a water outlet chamber at both ends of the tank body, and a micro-electrolysis chamber is arranged between the water inlet chamber and the water outlet chamber. Reaction device, the sewage enters the water distribution area from the water inlet chamber through the water inlet, and then enters the micro-electrolysis reaction device through the water distribution buffer plate for electrolysis. The micro-electrolysis reaction device includes a plurality of copper-plated wire mesh plates parallel to each other. The two opposite sides of the two copper-plated barbed wire panels are respectively arranged on the side walls of the two opposite tanks. The sewage after electrolytic treatment is discharged through the overflow of the weir and groove of the water outlet chamber. The utility model has a simple structure, a wide range of water quality, low cost, and a long service life. It can effectively reduce the chroma, toxicity and COD _Cr of organic wastewater. Improve the biodegradability of sewage. Copper adheres firmly to the surface of the barbed wire and is not easy to fall off. In the process of sewage treatment, low cost and low energy consumption are truly realized.

Description

A kind of iron-copper micro-electrolysis reaction tank

technical field

The utility model relates to an iron-copper micro-electrolysis reaction tank, which belongs to the technical field of sewage treatment equipment.

Background technique

2 After the 1950s, due to the development of the modern chemical industry, a large number of artificially synthesized organic compounds, such as synthetic plastics, synthetic fibers, organic pesticides, synthetic rubber, surfactants, etc., will be produced in large quantities during the production and use of these organic compounds According to the "National Environmental Statistical Bulletin", by the end of 2008, among the total wastewater discharge in China, the industrial organic wastewater accounted for 44.3%. The pollutants in the wastewater are complex and contain a variety of toxic substances. , the concentration is high, and it often contains many refractory organic substances, such as nitroaromatic compounds, polycyclic aromatic hydrocarbons, alkylbenzenesulfonic acid, chlorophenol, polychlorinated biphenyls and humic acids, etc. Some of these organic substances have carcinogenic, The teratogenic and mutagenic effects are extremely harmful to the environment and human beings. High-concentration refractory organic wastewater generally adopts pretreatment-biochemical degradation technology, but the current organic wastewater pretreatment technology is suitable for fewer types of wastewater and is difficult to promote because of its high cost.

Micro-electrolysis, also known as internal electrolysis, was introduced into China in the 1980s. The micro-electrolysis method is to use the iron and carbon in the iron filings to form a primary battery to degrade the pollutants in the wastewater. This method has the advantages of low cost, wide application range, good treatment effect, simple process, convenient operation and maintenance, etc., especially for The treatment of industrial wastewater with high salinity, high toxicity, high COD and high chroma has more obvious advantages than other processes. The B/C of the refractory wastewater is greatly improved after the micro-electrolysis process, which is conducive to the improvement of the subsequent biological treatment effect. In China, this process is generally used for the pretreatment of wastewater, or combined with other processes to achieve the purpose of removing pollutants. . Iron-carbon micro-electrolysis, as the most common micro-electrolysis technology in China, has been successfully applied to the treatment of wastewater from dyes, printing and dyeing, pesticides, pharmaceuticals, and oil. However, the existing iron-carbon micro-electrolysis process has exposed the following problems during operation: iron filings packing compaction and packing bed channeling. After the iron-carbon micro-electrolysis method has been in operation for a period of time, sewage will be generated in the packing after the iron filings packing is agglomerated. Ditch flow makes the effluent water quality worse. And the iron-carbon micro-electrolysis reaction is generally carried out under acidic conditions, which limits its scope of application to a certain extent.

Contents of the invention

Aiming at the deficiencies of the prior art, the utility model provides an iron-copper micro-electrolysis reaction tank, which adopts copper as an inert electrode, and the potential difference between the two poles of iron and copper is greater than that between iron and carbon, greatly accelerating the Oxidation of organic pollutants and reduction of organic pollutants, increase the reaction rate of micro-electrolysis, high treatment efficiency; wide range of water quality, low cost, long service life and solve the problem of filler agglomeration and channeling in the filler.

Explanation of terms:

1+1 hydrochloric acid: at room temperature, the volume ratio of hydrochloric acid to water is 1:1.

The technical scheme of the utility model is as follows:

An iron-copper micro-electrolysis reaction tank, comprising a tank body, a water inlet chamber and a water outlet chamber are respectively arranged at opposite ends of the tank body, a micro-electrolysis reaction device is arranged between the water inlet chamber and the water outlet chamber, the water inlet chamber and the water outlet chamber A water distribution buffer plate is set between the micro-electrolysis reaction devices, and a water distribution hole is arranged on the water distribution buffer plate. The area between the water inlet chamber and the water distribution buffer plate is the water distribution area, and the water inlet chamber The water inlet in the lower part is connected with the water distribution area, and the lower part of the micro-electrolysis reaction device is an aeration area. The area between is the water outlet area. The water outlet chamber is provided with a water outlet near the side wall of the micro-electrolysis reaction device. The water outlet chamber communicates with the water outlet area through the water outlet. The micro-electrolysis reaction device includes a plurality of mutual Parallel copper-plated wire mesh panels, the opposite two sides of each copper-plated wire mesh panel are respectively arranged on the opposite side walls of the tank body.

Each of the copper-plated wire mesh panels is perpendicular to the bottom surface of the tank body and arranged parallel to the water inlet chamber and the water outlet chamber.

The opposite side walls of the tank body are respectively provided with clamping grooves, and the copper-plated wire mesh board is clamped on the tank body through the clamping grooves.

There are 60-80 pieces of copper-plated wire mesh panels, the distance between two adjacent copper-coated wire mesh panels is 0.5-0.6cm, and the size of the copper-coated wire mesh panels is 55-65cm×35-40cm. The size of the hole is 0.5-0.8 cm×0.5-0.8 cm.

The water distribution holes are evenly distributed on the water distribution buffer plate, and the shape of the water distribution holes is hexagonal or circular.

The side wall of the tank body in the water outlet area is provided with a water outlet return port, and the side wall of the tank body in the water distribution area is provided with a return water inlet. The water outlet return port is connected with the return water inlet through a connecting pipe. There is a return pump, and the return pump returns the water in the outlet area to the water distribution area.

The water outlet is arranged at the lower part of the side wall of the water outlet chamber, and the bottom of the water outlet chamber is sunken downward to form an inverted pyramid-shaped sedimentation collection tank, and the bottom of the sinking bottom collection tank is provided with a muddy water discharge port. The advantage of this design: the sludge at the bottom of the tank can be washed from left to right, enter the bottom collection tank through the water outlet, and then be discharged from the muddy water outlet, so that it is convenient to clean the bottom of the tank.

Preferably, an air pump is arranged on the pipeline of the intake pipe, and the aerator adopts a microporous aerator, and the aerator is located in the middle of the bottom of the tank body. The advantage of this design is that it can effectively prevent the pores from being blocked by the shedding sludge, and the utility model can selectively set the aeration position according to the water quality.

The working process of the iron-copper micro-electrolysis reaction tank of the utility model is as follows: when in use, the sewage enters the water distribution area from the water inlet chamber through the water inlet, and then enters the micro-electrolysis reaction device through the water distribution buffer plate, and the sewage is mixed with the micro-electrolysis reaction device in the micro-electrolysis reaction device The iron-copper electrodes of the copper-plated wire mesh panels are in full contact, and micro-electrolysis reactions occur under the condition of aeration in the aerator. The sewage after electrolytic treatment enters the water outlet chamber through the water outlet, and then is discharged through the outlet weir. After electrolysis, the sewage in the water outlet area can be pumped into the water distribution area by the reflux pump through the water outlet return port to form a reflux, and the electrolyzed sewage is returned to the water distribution area and enters the micro-electrolysis reaction device for secondary electrolysis, so that the wastewater in the wastewater The organic matter is fully precipitated, and the sewage in the electrolytic cell forms an internal mixing cycle to improve the treatment effect of sewage. The passivated copper-plated wire mesh plate can be removed from the tank for cleaning to restore its reactivity. After the copper-plated wire mesh plate is taken out, the sludge at the bottom of the tank body can be washed from left to right to the sediment collection tank and discharged to clean the bottom of the tank. the goal of. The iron-copper micro-electrolysis method uses copper as an inert electrode to treat wastewater. The potential difference between the iron-copper electrodes is larger than that of iron-carbon, which is conducive to accelerating the oxidation of iron and the reduction of organic pollutants, which can strongly oxidize and degrade the organic pollutants in wastewater. Pollutants, quickly reduce COD _Cr , toxicity and chromaticity in wastewater, improve biodegradability of wastewater, reduce organic load in subsequent biochemical treatment, and improve reaction efficiency of micro-electrolysis.

Features and beneficial effects of the utility model:

1. The utility model uses a copper-plated wire mesh plate as the main body of the micro-electrolysis reaction device. The copper is evenly distributed on the wire mesh but does not completely cover the surface of the wire, so that the iron and copper can fully contact with the wastewater. Among them, iron and copper are respectively used as the anode and cathode of micro-electrolysis, and the iron content in the unit volume reaction zone is large. The cathode copper and the anode iron are combined by electroless copper plating, and the copper and iron are fully contacted, which promotes the transfer of electrons from the anode to the cathode. , strengthen the galvanic corrosion, increase the micro-electrolysis reaction rate, make the dyes and organic matter in the wastewater fully sink to the bottom, reduce the COD _Cr , toxicity and chromaticity in the wastewater, improve the biodegradability of the wastewater, and improve the treatment efficiency.

2. The copper-plated wire mesh plate of the utility model has a large surface area, and the mesh plate is immersed in the sewage, so that the sewage and the copper-iron electrodes are fully contacted, which is beneficial to the electrode reaction. At the same time, the copper-plated wire mesh plate is set perpendicular to the bottom plane of the tank, and there is a gap between the plates. The flocs generated during the electrolysis process can fall off directly under the action of gravity, which reduces the difficulty of washing the reaction tank.

3. The copper-plated wire mesh panel of the utility model can be taken out and washed directly, which is convenient for cleaning. The sediment in the tank can also be washed from left to right and discharged from the washing and drainage device. The washing process is simple and the energy consumption is low.

4. The utility model is simple in structure, applicable to a wide range of water quality, low in cost, long in service life and solves the problems of filler agglomeration and channeling in the filler.

Description of drawings

Fig. 1 is the longitudinal sectional view of iron-copper micro-electrolysis reaction tank;

Fig. 2 is the structural representation of copper-plated wire mesh panel;

Fig. 3 is the schematic diagram of water distribution buffer plate;

Figure 4 is a schematic diagram of the three-dimensional structure of the water outlet chamber and the sediment collection tank.

Among them, 1. Air pump; 2. Water inlet chamber; 3. Water inlet; 4. Return water inlet; 5. Air intake pipe; 6. Water distribution area; 7. Aerator; 8. Water distribution buffer plate; 9. Copper wire mesh plate; 10, card slot; 11, water outlet; 12, water outlet cavity, 13, water outlet return port; 14, return pump; 15, outlet weir groove; 16, sediment collection tank; 17, water distribution hole.

Detailed ways

The utility model will be further elaborated below in conjunction with the accompanying drawings and embodiments, but the protection scope of the utility model is not limited thereto.

Example 1

The structure is shown in Figure 1. The iron-copper micro-electrolysis reaction tank of the present utility model includes a tank body, and a water inlet chamber 2 and a water outlet chamber 12 are respectively arranged at opposite ends of the tank body, and the water inlet chamber 2 and the water outlet chamber 12 A micro-electrolysis reaction device is provided between them, and a water distribution buffer plate 8 is provided between the water inlet chamber 2 and the micro-electrolysis reaction device. The water distribution buffer plate 8 is provided with water distribution holes 17, and the water distribution holes 17 are evenly distributed in the water distribution area. On the buffer plate 8, the shape of the water distribution hole 17 is preferably hexagonal, and the structure is shown in FIG. 3 . The area between the water inlet chamber 2 and the water distribution buffer plate 8 is the water distribution area 6, the water inlet chamber 2 communicates with the water distribution area 6 through the water inlet 3 arranged at the bottom of the water inlet chamber 2, and the micro-electrolysis reaction The device comprises a plurality of copper-plated wire mesh panels 9 parallel to each other, and the opposite sides of each copper-coated wire mesh panel are respectively arranged on the opposite side walls of the tank body. The opposite side walls of the tank body are provided with locking slots 10 respectively, and the opposite sides of the copper-plated wire mesh board 9 are locked in the locking slots. Preferably in the present utility model, each copper-plated wire mesh plate is perpendicular to the bottom surface of the tank body, and each copper-plated wire mesh plate is arranged parallel to the water inlet chamber 2 and the water outlet chamber 12. The structure of copper-plated wire mesh board 9 is as shown in Figure 2, and copper-plated wire mesh board 9 is 60, and the spacing between adjacent two copper-plated wire mesh boards 9 is 0.5cm, and the size of described copper-plated wire mesh board 9 is 55cm ×35cm, there are dense wire mesh holes on the copper-plated wire mesh board, and the size of the wire mesh holes is 0.5cm×0.5cm. The contact area between the iron and copper poles and the sewage is greatly increased, and the efficiency of the electrolytic reaction is improved.

The lower part of the micro-electrolysis reaction device is an aeration area, and the aeration area is provided with an aerator 7, and the aerator 7 communicates with the air intake pipe 5, and an air pump 1 is arranged on the pipeline of the air intake pipe 5. The aerator 7 is located in the middle of the tank bottom, and the aerator 7 adopts a microporous aerator. The air hole can be effectively prevented from being blocked by the shedding sludge, and the utility model can selectively set the aeration position according to the water quality.

The area between the water outlet chamber 12 and the micro-electrolysis reaction device is the water outlet area, and the bottom of the side wall of the water outlet chamber 12 near the micro-electrolysis reaction device is provided with a water outlet 11, and the water outlet chamber 12 is communicated with the water outlet area through the water outlet 11. On the side wall of the water outlet chamber 12 close to the port of the water outlet chamber 12, an outlet weir groove 15 is arranged, and the water treated and purified by the iron-copper micro-electrolysis reaction tank flows into the water outlet chamber 12 through the water outlet 11, and then overflows through the outlet weir groove 15 to be discharged . Preferably in the present invention, the bottom of the outlet chamber 12 is sunken downward to form an inverted pyramid-shaped sedimentation collection tank 16, as shown in Figure 4, and the bottom of the sinking bottom collection tank 16 is provided with a muddy water outlet. When it is necessary to remove the sludge in the tank body, take out the copper-plated wire mesh plate 9, the sludge at the bottom of the tank body can be washed from left to right to the sinking bottom collection tank 16, and then discharged from the muddy water outlet to clean the bottom of the tank Purpose, the flushing process is simple and the energy consumption is low.

The utility model can be provided with a water outlet return port 13 on the side wall of the tank body in the water outlet area as required, and a return water inlet 4 is arranged on the tank body side wall of the water distribution area 6, and the water outlet return port 13 is connected to the return water inlet through the connecting pipe. 4 are connected, and a return pump 14 is arranged on the connecting pipe. The return pump 14 returns the water in the water outlet area to the water distribution area 6, and the sewage returned to the water distribution area 6 enters the micro-electrolysis reaction device through the water distribution buffer plate 8, and then Perform secondary electrolysis.

After the iron-copper micro-electrolysis reaction tank runs for a period of time, when the iron wire is consumed to be thinner, multiple thinned copper-plated wire mesh panels can be overlapped and fixed together, fixed in a card slot 10 for continued use, or the Take out the copper-plated wire mesh plate and replace it with a new copper-plated wire mesh plate. The flocs generated during the electrolysis process can fall off directly under the action of gravity. When it is necessary to remove the flocs, take the copper-plated wire mesh plate 9 out of the slot and clean it directly. , the sediment at the bottom of the tank body can be washed with water.

The method for making of the copper-plated wire mesh panel of the present utility model comprises the following steps:

(1) Use No. 18 iron wire to weave a wire mesh panel with a size of 55cm×35cm, and the size of the wire mesh is 0.5cm×0.5cm;

(2) Place the woven wire mesh in 1+1 hydrochloric acid. When the hydrochloric acid solution turns light green, immediately take out the wire mesh and immerse it in a plating solution with a pH of 4 and a temperature of 20°C for copper plating. The time is 45min, and the described plating bath composition is: copper sulfate 0.45mol/L, sodium acetate 10g/L, propenylthiourea 0.5g/L, sodium lauryl sulfate 1g/L, polyethylene glycol 5g/L L;

(3) After the plating solution is clarified, take out the wire mesh, dry it in vacuum, and store it in a sealed container.

Through actual tests, using the iron-copper micro-electrolysis reaction tank of the present utility model, the acid scarlet G simulated wastewater and the methylene blue simulated wastewater with a concentration of 1g/L are subjected to micro-electrolysis treatment, and the chromaticity removal rate is greater than 98% and 90% respectively within 1h. %, COD _Cr removal rates were 46% and 60%. It can also reduce the COD _Cr of industrial coking wastewater from about 8000mg/L to 3200mg/L.

Example 2

The structure of the iron-copper micro-electrolysis reaction tank is as described in Example 1, and the difference is:

There are 80 copper-plated wire mesh panels 9, and the distance between two adjacent copper-plated wire mesh panels 9 is 0.6cm. The size of the copper-plated wire mesh panels 9 is 65cm×40cm, and there are dense wire mesh holes on the copper-plated wire mesh panels. , The size of the wire mesh hole is 0.8cm×0.8cm.

Claims (8)

1. an iron copper micro-electrolysis reaction groove comprises cell body, is respectively arranged with intake antrum and water chamber at the inner relative two ends of cell body; Be provided with micro-electrolysis reaction device between intake antrum and the water chamber, be provided with the water distribution dash plate between intake antrum and the micro-electrolysis reaction device, the water distribution dash plate is provided with water distributing pore; Zone between intake antrum and the water distribution dash plate is a water distribution zone; Intake antrum is connected with water distribution zone through the water-in that is arranged on the intake antrum bottom, and the bottom of micro-electrolysis reaction device is the aeration zone, and described aeration zone is provided with aerator; Aerator is connected with inlet pipe; Zone between water chamber and the micro-electrolysis reaction device is an exhalant region, and described water chamber is provided with water outlet near the sidewall of micro-electrolysis reaction device, and water chamber is connected with exhalant region through water outlet; Described micro-electrolysis reaction device comprises a plurality of copper coated iron wire web plates that are parallel to each other, and the both sides that each copper coated iron wire web plate is relative are separately positioned on the relative cell body two side.

2. iron copper micro-electrolysis reaction groove according to claim 1 is characterized in that: said each copper coated iron wire web plate is vertical with the cell body bottom surface, laterally arranges with intake antrum and water chamber.

3. iron copper micro-electrolysis reaction groove according to claim 1 is characterized in that: be respectively arranged with draw-in groove on the said relative cell body two side, the copper coated iron wire web plate is stuck on the cell body through draw-in groove.

4. iron copper micro-electrolysis reaction groove according to claim 1; It is characterized in that: described copper coated iron wire web plate is 60～80; Spacing between the adjacent two copper coated iron wire web plates is 0.5～0.6cm; The size of described copper coated iron wire web plate is 55～65cm * 35～40cm, and the size of wire netting mesh is 0.5～0.8cm * 0.5～0.8cm.

5. iron copper micro-electrolysis reaction groove according to claim 1, it is characterized in that: described water distributing pore is evenly distributed on the water distribution dash plate, water distributing pore be shaped as hexagon or circle.

6. according to the arbitrary described iron copper micro-electrolysis reaction groove of claim 1-5; It is characterized in that: the cell body sidewall of said exhalant region is provided with the effluent recycling mouth; The cell body sidewall of water distribution zone is provided with the backflow water-in; The effluent recycling mouth is connected with the backflow water-in through pipe connecting, and pipe connecting is provided with reflux pump, and reflux pump is back to water distribution zone with the water of exhalant region.

7. iron copper micro-electrolysis reaction groove according to claim 1; It is characterized in that: described water outlet is arranged on the bottom of water chamber sidewall; The bottom of described water chamber is recessed to form chamfered edge taper deposition collecting tank downwards, and the bottom that sinks to the bottom collecting tank is provided with the muddy water relief outlet.

8. iron copper micro-electrolysis reaction groove according to claim 1, it is characterized in that: the pipeline of inlet pipe is provided with air pump, and aerator adopts micro-hole aerator, and aerator is positioned at the centre of cell body bottom.

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