A mixed treatment device for electroplating wastewater

Abstract

The invention discloses an electroplating wastewater mixing treatment device, which is an "S"-shaped mixing treatment device formed by at least 4 square tubes connected in series; wastewater inlets and mixed liquid outlets are respectively arranged at both ends of the mixing treatment device; at least 3 reagent inlets are arranged on at least one square tube starting from the wastewater inlet end; a plurality of upper and lower symmetrical first liquid baffles are arranged in the square tube to form an "eight"-shaped channel along the fluid direction, and the fluid enters the "eight"-shaped channel from the open end; along the fluid direction, upper and lower symmetrical second liquid baffles are arranged on the outlet side of the "eight"-shaped channel to form a "human"-shaped liquid baffle, and the angle of the "human"-shaped liquid baffle is facing away from the fluid; the mixing treatment device is provided with 1 to 3 reflux pipes, and the reflux pipes are located between the end of the 1+n square tube and the front end of the n square tube, and n is 1, 2 or 3. The device of the invention adopts the mode of segmented feeding and partial reflux of mixed materials, thereby improving the mixing efficiency.

Description

Technical Field

[0001] The invention belongs to the field of electroplating wastewater treatment, and in particular relates to an electroplating wastewater mixing treatment device. Background Art

[0002] Mass transfer is an essential process in chemical reactions, and the quality of mass transfer directly affects the efficiency of chemical reactions. In the field of electroplating wastewater, the physicochemical treatment unit mainly carries out chemical reactions, and the commonly used reaction device is a wastewater treatment tank equipped with a mechanical stirrer. Under conventional mechanical stirring, due to the low stirring rate, the mass transfer effect of the electroplating wastewater physicochemical treatment unit is poor, and the desired mixing effect can only be achieved by increasing the tank capacity and extending the reaction residence time. However, increasing the tank capacity will increase the area occupied by the tank, and the reaction tank is not easy to move, which will undoubtedly bring difficulties to some manufacturers with limited space.

[0003] Static mixer is a kind of efficient mixing equipment. Unlike traditional agitators, it has no moving parts inside. Its working mechanism is to use special structural parts fixed in the tube to change the flow state of the fluid in the tube to achieve the purpose of dispersion and mixing between two or more fluids. Compared with other equipment, static mixer has the advantages of high efficiency, small size, low energy consumption, low investment, and easy continuous production. It is not only used in mixing processes, but also in processes including gas / gas mixing, liquid / liquid extraction, gas / liquid reaction, enhanced heat transfer and liquid / liquid reaction. However, due to the limitation of the feed position, the commonly used static mixer is only suitable for working conditions where the flow rate of two or more fluids is similar or the flow rate difference is not large. For the wastewater treatment industry, the amount of reagent used is 0.01% to 1% of the wastewater mass. At the same time, the feed will cause uneven mixing due to the large difference in the flow rate of the two fluids, affecting the mixing effect. Summary of the invention

[0004] The purpose of the present invention is to provide a mixing treatment device for electroplating wastewater. The method of segmented feeding and partial reflux of the mixed liquid can effectively avoid the problem of uneven mixing and affecting the mixing effect caused by the large difference in the flow rates of different fluids in the traditional static mixer, thereby improving the mixing efficiency. At the same time, it is superior to the traditional mixing tank treatment method equipped with a mechanical agitator and has a high application value.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] The invention discloses an electroplating wastewater mixing treatment device, which is an "S"-shaped mixing treatment device formed by connecting at least 4 square tubes in series and located on the same horizontal plane; wastewater inlet and mixed liquid outlet are respectively arranged at two ends of the mixing treatment device; at least 3 reagent inlets are arranged on at least one square tube starting from the wastewater inlet end; a plurality of first liquid baffles symmetrical in upper and lower directions are arranged in the square tube to form an "eight"-shaped channel along the direction of the fluid, and the fluid enters the "eight"-shaped channel from the open end, and the flow rate of the fluid in the channel is increased; along the direction of the fluid, second liquid baffles symmetrical in upper and lower directions are arranged on the outlet side of the "eight"-shaped channel to form a "human"-shaped liquid baffle, and the angle of the "human"-shaped liquid baffle faces away from the fluid, so that the fluid is separated and a two-way spiral reflux is generated; the mixing treatment device is provided with 1 to 3 reflux pipes, and the reflux pipes are located between the end of the 1+nth square tube and the front end of the nth square tube, wherein n is 1, 2 or 3.

[0007] Preferably, the electroplating wastewater mixing device is composed of 5 square tubes connected in series and located on the same horizontal plane.

[0008] Preferably, an infusion pump is provided on the medicine inlet pipeline to control the flow rate of the medicine.

[0009] Preferably, starting from the wastewater inlet end, at least three reagent inlets are respectively provided on the first to third square tubes.

[0010] Preferably, the included angle of the "eight"-shaped channel is 60°; and the included angle of the "human"-shaped liquid baffle is 90°.

[0011] Preferably, the angle between the "eight"-shaped channel and the "human"-shaped liquid baffle is 1 to 3 cm.

[0012] Preferably, the upper and lower first liquid baffles constituting the "eight"-shaped channel are respectively fixed by the upper and lower inner walls of the square tube, but leave gaps with the front and rear inner walls of the square tube. The upper and lower second liquid baffles constituting the "human"-shaped liquid baffles are respectively fixed by the upper and lower inner walls of the square tube, but leave gaps with the front and rear inner walls of the square tube. By designing the gaps between the first and second liquid baffles and the front and rear side walls of the square tube, it is possible to avoid dead corners in the square tube, which may cause solid deposition.

[0013] Further preferably, the gap between the first liquid baffle plate and the corresponding side wall of the square tube is 1 / 20 to 1 / 15 of the width of the "eight" shaped channel, and the gap between the second liquid baffle plate and the corresponding side wall of the square tube is 1 / 20 to 1 / 15 of the width of the "human" shaped liquid baffle plate.

[0014] Preferably, an infusion pump is provided on the reflux pipe, and the reflux flow rate is controlled by the infusion pump to be 1 / 6 to 1 / 4 of the feed flow rate.

[0015] Preferably, the mixing treatment device is provided with three reflux pipes, which are respectively located between the end of the second square tube and the front end of the first square tube, between the end of the third square tube and the front end of the second square tube, and between the end of the fourth square tube and the front end of the third square tube.

[0016] The electroplating wastewater mixing treatment device of the present invention is used for mixing treatment, and the operation steps are as follows: the electroplating wastewater is continuously transported into the mixing treatment device through the infusion pump; the reagent is fed in stages and enters the mixing treatment device from the reagent inlet through the infusion pump at a set flow rate; the fluid enters the "eight" shaped channel from the open end, the fluid increases the flow rate in the channel, and the fluid quickly impacts the "human" shaped baffle plate to separate the fluid and generate a two-way spiral reflux; during the mixing process, the mixed liquid is controlled to partially reflux to further improve the mixing effect. The mixed liquid is finally discharged from the mixed liquid outlet.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention is improved on the basis of a static mixer, adopts a method of segmented feeding and partial reflux of the mixed liquid, and arranges a first liquid baffle plate inside a square tube to form an "eight"-shaped channel, and arranges a second liquid baffle plate to form a "human"-shaped liquid baffle plate. The "eight"-shaped channel allows the fluid to mix, and the fluid speed becomes faster. The "human"-shaped liquid baffle plate faces away from the fluid, so that the fluid is separated and a two-way spiral reflux is generated. The mixing treatment device of the present invention can effectively avoid the problem of uneven mixing and affecting the mixing effect caused by the large difference in the flow rate of different fluids in the traditional static mixer, improve the mixing efficiency, and improve the degree of continuity. At the same time, the liquid baffle plates constituting the "eight"-shaped channel and the "human"-shaped liquid baffle plate are not connected to the tube walls on both sides of the square tube, so as to avoid the formation of dead angles, solid deposition, and equipment fouling. The mixing treatment device of the present invention can replace the traditional mechanical stirring mixing method, and is suitable for the physical and chemical treatment unit of the electroplating wastewater treatment industry, and is particularly suitable for the situation where two or more streams of materials with large flow differences are fed simultaneously.

[0019] The mixing treatment device of the present invention is easy to disassemble and move, reduces the floor space occupied by the equipment, and solves the problem of limited site for wastewater treatment manufacturers. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of the electroplating wastewater mixing treatment device of the present invention;

[0021] Figure 2 It is a schematic diagram of the internal structure of the square tube;

[0022] Figure 3 It is a schematic diagram of the structure of the first liquid baffle plate and the second liquid baffle plate.

[0023] Figure 1In the figure, 1-square tube, 2-wastewater inlet, 3-mixed liquid outlet, 4-medicine inlet, 5-mixed liquid reflux outlet, 6-mixed liquid reflux inlet, 7-reflux pipe, 8-first liquid baffle plate, 9-second liquid baffle plate. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described below through specific implementation methods.

[0025] Example 1

[0026] like Figure 1-Figure 3 As shown, a plating wastewater mixing treatment device is an "S"-shaped mixing treatment device formed by connecting five square tubes 1 located on the same horizontal plane in series end to end. Starting from the wastewater inlet end, the five square tubes are the first square tube, the second square tube, the third square tube, the fourth square tube, and the fifth square tube in sequence; wastewater inlets 2 and mixed liquid outlets 3 are respectively provided at both ends of the mixing treatment device; three reagent inlets 4 are respectively provided on the first, second, and third square tubes; a plurality of upper and lower symmetrical first liquid baffles 8 are provided in the square tube 1 to form an "eight"-shaped channel along the direction of the fluid, and the fluid enters the "eight"-shaped channel from the open end, and the flow velocity of the fluid in the channel is increased; along the direction of the fluid, in the "eight"-shaped channel The outlet side is provided with a second liquid baffle plate 9 symmetrically arranged on the upper and lower sides to form a "human" shaped liquid baffle plate, the angle of which is opposite to the fluid, so that the fluid is separated and a bidirectional spiral reflux is generated; a mixed liquid reflux outlet 5 is arranged at the end of the second square tube, the end of the third square tube, and the end of the fourth square tube, respectively; a mixed liquid reflux inlet 6 is arranged at the front end of the first square tube, the front end of the second square tube, and the front end of the third square tube, respectively; a reflux pipe 7 is arranged between the end of the second square tube and the front end of the first square tube, between the end of the third square tube and the front end of the second square tube, and between the end of the fourth square tube and the front end of the third square tube, respectively; and an infusion pump is arranged on the reflux pipe 7 to control the reflux amount to be 1 / 6 to 1 / 4 of the feed flow rate.

[0027] An infusion pump is installed on the medicine inlet pipeline to control the flow of medicine.

[0028] The included angle of the "eight" shaped channel is 60°; the included angle of the "human" shaped liquid baffle is 90°.

[0029] The angle between the "eight" shaped channel and the "human" shaped liquid baffle plate is 1 to 3 cm.

[0030] The upper and lower first liquid baffles 8 constituting the "eight" shaped channel are fixed by the upper and lower inner walls of the square tube respectively but leave gaps with the front and rear inner walls of the square tube. The gap between the first liquid baffles 8 and the corresponding side walls of the square tube is 1 / 20 of the width of the "eight" shaped channel.

[0031] The upper and lower second liquid baffles 9 constituting the "human" shaped liquid baffle are fixed by the upper and lower inner walls of the square tube respectively, but leave gaps with the front and rear inner walls of the square tube. The gap between the second liquid baffle 9 and the corresponding side wall of the square tube is 1 / 20 of the width of the "human" shaped liquid baffle.

[0032] The electroplating wastewater mixing treatment device of this embodiment is used for mixing treatment, and the operation steps are as follows: the electroplating wastewater is continuously transported into the mixing treatment device through the infusion pump; the reagent is fed in stages, and enters the mixing treatment device from the reagent inlet 4 according to the set flow rate through the infusion pump; after the fluid enters the mixing treatment device, it enters the "eight" shaped channel from the open end, the fluid increases the flow rate in the channel, and the fluid quickly impacts the "human" shaped liquid baffle to separate the fluid, generating a two-way spiral reflux; during the mixing process, the mixed liquid is partially refluxed to further improve the mixing effect. The mixed liquid is finally discharged from the mixed liquid outlet 3.

Claims

1. A mixed treatment device for electroplating wastewater, characterized in that The invention relates to an "S"-shaped mixing treatment device formed by connecting at least four square tubes (1) in series and located on the same horizontal plane; wastewater inlets (2) and mixed liquid outlets (3) are respectively arranged at the two ends of the mixing treatment device; at least three reagent inlets (4) are arranged on at least one square tube starting from the wastewater inlet end; a plurality of upper and lower symmetrical first liquid baffles (8) are arranged in the square tube (1) to form an "eight"-shaped channel along the direction of the fluid; the upper and lower first liquid baffles (8) constituting the "eight"-shaped channel are respectively fixed by the upper and lower inner walls of the square tube but have gaps with the front and rear inner walls of the square tube; the fluid enters the "eight"-shaped channel from the open end. The invention discloses a mixing device for mixing and treating a plurality of square tubes, wherein the mixing and treating device comprises a plurality of mixing and treating devices, wherein the mixing and treating device comprises a plurality of mixing and treating devices, wherein the mixing and treating devices comprises a plurality of mixing and treating devices, wherein the mixing and treating devices comprise ...

2. The electroplating wastewater mixing treatment device according to claim 1 is characterized in that The electroplating wastewater mixing treatment device is composed of 5 square tubes connected in series and located on the same horizontal plane.

3. The electroplating wastewater mixing treatment device according to claim 1 is characterized in that Starting from the wastewater inlet end, at least three reagent inlets (4) are respectively arranged on the first to third square tubes.

4. The electroplating wastewater mixing treatment device according to claim 1 is characterized in that The included angle of the "eight" shaped channel is 60°; the included angle of the "human" shaped liquid baffle is 90°.

5. The electroplating wastewater mixed treatment device according to claim 1, characterized in that The distance between the "eight" shaped channel and the "human" shaped liquid baffle plate is 1 to 3 cm.

6. The electroplating wastewater mixed treatment device according to claim 1, characterized in that The gap between the first liquid baffle plate (8) and the corresponding side wall of the square tube is 1 / 20 to 1 / 15 of the width of the "eight" shaped channel.

7. The electroplating wastewater mixed treatment device according to claim 1, characterized in that The gap between the second liquid baffle plate (9) and the corresponding side wall of the square tube is 1 / 20 to 1 / 15 of the width of the herringbone liquid baffle plate.

8. The electroplating wastewater mixed treatment device according to claim 1, characterized in that An infusion pump is provided on the reflux pipe (7).

9. The electroplating wastewater mixed treatment device according to claim 1, characterized in that The mixing treatment device is provided with three reflux pipes, which are respectively located between the end of the second square tube and the front end of the first square tube, between the end of the third square tube and the front end of the second square tube, and between the end of the fourth square tube and the front end of the third square tube.

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