WO2020211886A2

WO2020211886A2 - Electroplating wastewater mixing and treating apparatus

Info

Publication number: WO2020211886A2
Application number: PCT/CN2020/103355
Authority: WO
Inventors: 陈永乐; 沈德华; 骆劲松; 范正芳; 陈尧; 李瑞鹏; 吴冬飞
Original assignee: 南京源泉环保科技股份有限公司
Priority date: 2019-12-19
Filing date: 2020-07-21
Publication date: 2020-10-22
Also published as: CN212151651U; JP3232299U; WO2020211886A3

Abstract

Disclosed is an electroplating wastewater mixing and treating apparatus, which is an "S"-shaped mixing and treating apparatus composed of at least four square pipes connected in series. A wastewater inlet and a mixed liquid outlet are respectively arranged at two ends of the mixing and treating apparatus. Starting from the wastewater inlet end, at least three chemical compound inlets are arranged on at least one square pipe. Several vertically symmetrical first liquid blocking plates are arranged in the square pipes, "八"-shaped channels are formed along a fluid direction, a fluid enters the "八"-shaped channels from the open ends, and vertically symmetrical second liquid blocking plates are arranged at the outlet sides of the "八"-shaped channels to form "人"-shaped liquid blocking plates along the fluid direction, the included angles of the "人"-shaped liquid blocking plates facing away from the fluid. The mixing and treating apparatus is provided with one to three backflow pipes, each backflow pipe being located between a rear end of an nth+1 square pipe and a front end of an nth square pipe, n being 1, and/or 2, and/or 3. The apparatus utilizes the means of segmented feeding and partial mixed material backflow, so as to increase the mixing efficiency.

Description

Electroplating wastewater mixed treatment device

Technical field

The invention belongs to the field of electroplating wastewater treatment, and in particular relates to an electroplating wastewater mixed treatment device.

Background technique

Mass transfer is an indispensable process in chemical reactions. The quality of mass transfer directly affects the efficiency of chemical reactions. In the field of electroplating wastewater, the physical and chemical treatment unit mainly conducts chemical reactions and the commonly used reaction device is a wastewater treatment tank equipped with a mechanical mixer. Under conventional mechanical stirring, due to the low stirring rate, the mass transfer effect of the electroplating wastewater physical and chemical treatment unit is poor. The only way to achieve the desired mixing effect is to increase the tank capacity and extend the reaction residence time. However, increasing the tank capacity will increase the floor area of the tank, and the reaction tank is not easy to move, which will undoubtedly cause difficulties for some manufacturers with limited space.

Static mixer is a kind of high-efficiency 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 two kinds of or The purpose of dispersion and mixing between multiple fluids. Compared with other equipment, the static mixer has the advantages of high efficiency, small size, low energy consumption, low investment, easy continuous production, etc. It is not only used in the mixing process, but also can be used in gas/gas mixing and liquid/liquid extraction. , Gas/liquid reaction, enhanced heat transfer and liquid/liquid reaction. However, the commonly used static mixers are only suitable for working conditions where the flow rates of two or more fluids are similar or have little difference due to the limitation of the feed position. For the wastewater treatment industry, the amount of medicament used is 0.01% to 1 of the quality of wastewater. %, while the feed will cause uneven mixing due to the large difference in the flow of the two fluids, which will affect the mixing effect.

Summary of the invention

The purpose of the present invention is to provide an electroplating wastewater mixing treatment device, which adopts segmented feeding and partial reflux of the mixed liquid, which can effectively avoid the uneven mixing caused by the large difference in the flow of different fluids in the traditional static mixer and affect the mixing effect The problem of improving mixing efficiency, and at the same time is better than the traditional mixing tank with mechanical agitator processing method, has higher application value.

The purpose of the present invention is achieved through the following technical solutions:

An electroplating wastewater mixing treatment device, which is an "S"-shaped mixing treatment device formed by connecting at least 4 square pipes in series on the same horizontal plane; both ends of the mixing treatment device are respectively provided with a wastewater inlet and a mixed liquid Outlet; from the waste water inlet end, at least 3 drug inlets are provided on at least one square tube; the square tube 1 is provided with a number of upper and lower symmetric first baffles, forming an "eight" shape along the fluid direction In the channel, the fluid enters the "eight"-shaped channel from the open end. The fluid increases the flow rate in the channel; along the fluid direction, a second symmetrical upper and lower baffle plate is arranged on the outlet side of the "eight"-shaped channel to form a "human" block The liquid plate, the angle of the "human" type liquid baffle faces away from the fluid, which separates the fluid and produces a bidirectional spiral return; the mixing processing device is provided with 1 to 3 return pipes.

Preferably, the electroplating wastewater mixing device is formed by connecting 5 square tubes in series on the same horizontal plane. Preferably, an infusion pump is provided on the medicine inlet pipeline to control the flow of the medicine.

Preferably, from the waste water inlet end, at least 3 pharmaceutical inlets are respectively provided on the first to third square pipes.

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

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

Preferably, the upper and lower first baffles forming the "eight"-shaped channel are respectively fixed by the upper and lower inner walls of the square tube, but leave a gap with the front and rear inner walls of the square tube. The upper and lower second baffles constituting the "human" type baffle are respectively fixed by the upper and lower inner walls of the square tube, but there is a gap with the front and rear inner walls of the square tube. Through the design of the gap between the first and second liquid baffle plates and the front and rear side walls of the square tube, it is possible to avoid dead corners in the square tube and cause solid deposition.

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 second liquid baffle plate corresponds to the side wall of the square tube. The gap is 1/20～1/15 of the width of the "human" type liquid baffle.

Preferably, an infusion pump is provided on the return pipe, and the return flow is controlled by the infusion pump to be 1/6 to 1/4 of the feed flow.

Preferably, the mixing processing device is provided with three return pipes, and the return pipes are respectively located between the end of the second square pipe and the front end of the first square pipe, the end of the third square pipe and the second pipe. Between the front end of the square tube, between the end of the fourth square tube and the front end of the third square tube.

The electroplating wastewater mixing treatment device of the present invention is used for mixing treatment, and the operation steps are: electroplating wastewater is continuously conveyed into the mixing treatment device through an infusion pump; the medicament is fed in sections, and the infusion pump enters the mixing treatment device from the medicament inlet 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" baffle to separate the fluid and produce a two-way spiral return; during the mixing process, the mixed liquid is controlled to partly return, and further Improve the mixing effect. The mixed liquid is finally discharged from the mixed liquid outlet.

Compared with the prior art, the beneficial effects of the present invention:

The present invention is improved on the basis of the static mixer, adopts the method of segmented feeding and partial reflux of the mixed liquid, and sets the first baffle plate inside the square tube to form an "eight"-shaped channel, and sets the second baffle plate to form The "human" type baffle plate, the "eight"-shaped channel makes the fluid mix and the fluid speed becomes faster, and the "human" type baffle plate faces the fluid back to separate the fluid and produce a two-way spiral return flow. The mixing processing device of the present invention can effectively avoid the problems of uneven mixing caused by large differences in flow rates of different fluids and affecting the mixing effect in the traditional static mixer, improving mixing efficiency and increasing the degree of continuity. At the same time, the baffle plates that form the "eight"-shaped channel and the "human" baffle plate are not connected with the two sides of the square pipe to avoid dead corners, solid deposits, and equipment fouling. The mixing treatment device of the present invention can replace the traditional mechanical stirring and mixing method, is suitable for the physicochemical treatment unit of the electroplating wastewater treatment industry, and is especially suitable for the simultaneous feeding of two or more materials with large flow differences.

The mixing treatment device of the present invention is convenient to disassemble and move, reduces the area of equipment, and solves the problem of limited site for wastewater treatment factories.

Description of the drawings

Figure 1 is a schematic diagram of the structure of the electroplating wastewater mixed treatment device of the present invention;

Figure 2 is a schematic diagram of the internal structure of the square tube;

Fig. 3 is a schematic diagram of the structure of the first liquid baffle and the second liquid baffle.

In the figure, 1-square pipe, 2-wastewater inlet, 3-mixed liquid outlet, 4-medicament inlet, 5-mixed liquid return outlet, 6-mixed liquid return inlet, 7-return pipe, 8-first baffle , 9-The second baffle.

detailed description

The technical solution of the present invention will be further described below through specific embodiments.

Example 1

As shown in Fig. 1 to Fig. 3, an electroplating wastewater mixing treatment device is an "S"-shaped mixing treatment device formed by connecting 5 square tubes 1 end to end in series on the same horizontal plane, starting from the wastewater inlet, 5 The root square pipes are the first square pipe, the second square pipe, the third square pipe, the fourth square pipe, and the fifth square pipe in sequence; there are wastewater inlets at both ends of the mixing treatment device. 2. Mixture outlet 3; 3 pharmaceutical inlets 4 are respectively provided on the first square tube, the second square tube, and the third square tube. The square tube 1 is provided with a number of upper and lower symmetrical first liquid baffle 8 plates, forming an "eight"-shaped channel along the fluid direction. The fluid enters the "eight"-shaped channel from the open end and the fluid increases the flow rate in the channel. Along the direction of the fluid, a second baffle 9 with upper and lower symmetrical upper and lower sides is provided on the outlet side of the "eight"-shaped channel to form a "human"-shaped baffle. Separate and produce a two-way spiral return; at the end of the second square tube, the end of the third square tube, and the end of the fourth square tube are respectively set the mixed liquid return outlet 5, at the front end of the first square tube, the second The front end of the root square tube and the front end of the third square tube are respectively provided with mixed liquid return inlet 6, which are respectively between the end of the second square tube and the front end of the first square tube, and between the end of the third square tube and the second square tube. A return pipe 7 is set between the front ends of the root square pipes, between the end of the fourth square pipe and the front end of the third square pipe. The return pipe 7 is provided with an infusion pump to control the return flow rate to 1/6 to 1 of the feed flow rate. /4.

An infusion pump is arranged on the medicine inlet pipeline to control the flow of the medicine.

The included angle of the "eight"-shaped channel is 60°; the included angle of the "human" type liquid baffle is 90°.

The distance d between the angle between the "eight"-shaped channel and the "human"-shaped baffle is 1 to 3 cm.

The upper and lower first baffle plates 8 forming the "eight"-shaped channel are respectively fixed by the upper and lower inner walls of the square tube but with gaps between the front and rear inner walls of the square tube. The first baffle plate 8 corresponds to the square tube. The gap between the side walls is 1/20～1/15 of the width of the "eight" channel.

The upper and lower second baffles 9 constituting the "human" baffle 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 second baffle 9 is connected to the square tube. The gap between the corresponding side wall of the tube is 1/20～1/15 of the width of the "human" baffle.

The electroplating wastewater mixing treatment device of this embodiment is used for mixing treatment. The operation steps are: electroplating wastewater is continuously transported into the mixing treatment device through the infusion pump; the medicament is fed in sections, and the infusion pump enters the mixing treatment from the medicament inlet 4 at a set flow rate Device; After the fluid enters the mixing processing 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" baffle to separate the fluid and produce a two-way spiral backflow; during the mixing process , Control the partial reflux of the mixed liquid to further improve the mixing effect. The mixed liquid is finally discharged from the mixed liquid outlet 3.

Claims

An electroplating wastewater mixing treatment device, characterized in that it is formed by connecting at least 4 square pipes (1) in the same horizontal plane in series, and is an "S"-shaped mixing treatment device; both ends of the electroplating wastewater mixing treatment device are respectively provided There are wastewater inlets (2) and mixed liquid outlets (3); from the wastewater inlet, at least 3 pharmaceutical inlets (4) are provided on at least one square pipe; several upper and lower sides are provided in the square pipe (1) The symmetrical first baffle (8) forms an "eight"-shaped channel along the fluid direction; along the fluid direction, an upper and lower symmetrical second baffle (9) is provided on the outlet side of the "eight"-shaped channel to form a " Human" type liquid baffle; the electroplating wastewater mixing treatment device is provided with 1 to 3 return pipes (7).
The electroplating wastewater mixing treatment device according to claim 1, wherein the electroplating wastewater mixing device is formed by connecting 5 square tubes in series on the same horizontal plane.
The electroplating wastewater mixed treatment device according to claim 1, characterized in that, from the wastewater inlet end, at least three pharmaceutical inlets (4) are respectively provided on the first to third square pipes.
The electroplating wastewater mixed treatment device according to claim 1, wherein the included angle of the "eight"-shaped channel is 60°; the included angle of the "human" type liquid baffle is 90°.
The electroplating wastewater mixed treatment device according to claim 1, wherein the "eight"-shaped channel is 1 to 3 cm away from the "human" type liquid baffle.
The electroplating wastewater mixed treatment device according to claim 1, characterized in that the upper and lower first baffle plates (8) constituting the "eight"-shaped channel are respectively fixed by the upper and lower inner walls of the square tube but are connected to the square tube. A gap is left on the front and rear inner walls; the gap between the first liquid baffle (8) and the corresponding side wall of the square tube is 1/20 to 1/15 of the width of the "eight"-shaped channel.
The electroplating wastewater mixed treatment device according to claim 1, characterized in that the upper and lower second baffles (9) constituting the "human" baffle are respectively fixed by the upper and lower inner walls of the square tube but are There are gaps on 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 to 1/15 of the width of the "human" type liquid baffle.
The electroplating wastewater mixed treatment device according to claim 1, wherein an infusion pump is provided on the return pipe (7).
The electroplating wastewater mixing treatment device according to claim 1, wherein the electroplating wastewater mixing treatment device is provided with three return pipes (7), and the return pipes (7) are respectively located at the end of the second square pipe and Between the tip of the first square tube, between the tip of the third square tube and the tip of the second square tube, and between the tip of the fourth square tube and the tip of the third square tube.