CN113003620A

CN113003620A - Electroplating effluent mixed treatment device

Info

Publication number: CN113003620A
Application number: CN201911320962.4A
Authority: CN
Inventors: 陈永乐; 沈德华; 骆劲松; 范正芳; 陈尧; 李瑞鹏; 吴冬飞
Original assignee: Nanjing Spring Environmental Science & Technology Co ltd
Current assignee: Nanjing Spring Environmental Science & Technology Co ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2021-06-22

Abstract

The invention discloses a mixed treatment device for electroplating wastewater, which is an S-shaped mixed treatment device formed by connecting at least 4 square pipes in series; a wastewater inlet and a mixed liquid outlet are respectively arranged at the two ends of the mixing treatment device; at least 1 square tube is provided with at least 3 medicament inlets from the wastewater inlet end; a plurality of first liquid baffles which are symmetrical up and down are arranged in the square tube, a splayed channel is formed in the fluid direction, fluid enters the splayed channel from the open end, a second liquid baffle which is symmetrical up and down is arranged on the outlet side of the splayed channel in the fluid direction to form a herringbone liquid baffle, and the included angle of the herringbone liquid baffle is opposite to the fluid; the mixing processing device is provided with 1-3 return pipes, the return pipes are positioned between the tail ends of the 1+ nth square pipes and the front ends of the nth square pipes, and n is 1, 2 or 3. The device adopts the modes of sectional feeding and partial backflow of mixed materials, thereby improving the mixing efficiency.

Description

Electroplating effluent mixed treatment device

Technical Field

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

Background

Mass transfer is an essential process in chemical reaction, and the quality of mass transfer directly affects the efficiency of chemical reaction. In the field of electroplating wastewater, a reaction device which is commonly used by a physicochemical treatment unit for mainly carrying out chemical reaction is a wastewater treatment tank provided with a mechanical stirrer. Under the conventional mechanical stirring, the stirring speed is not high, the mass transfer effect of the physical and chemical treatment unit of the electroplating wastewater is poor, and the expected mixing effect can be achieved only by increasing the capacity of the tank body and prolonging the reaction retention time. However, increasing the capacity of the tank body leads to an increase in the floor area of the tank body, and in addition, the reaction tank body is not easy to move, which undoubtedly brings difficulties to some manufacturers with limited sites.

The static mixer is a high-efficiency mixing device, and is different from a traditional mixer, the static mixer has no moving parts inside, and the working mechanism of the static mixer is to change the flowing state of fluid in a pipe by utilizing a special structural part fixed in the pipe so as to achieve the aims of dispersion and mixing of two or more fluids. Compared with other devices, the static mixer has the advantages of high efficiency, small volume, low energy consumption, investment saving, easy continuous production and the like, and can be applied to mixing processes, gas/gas mixing, liquid/liquid extraction, gas/liquid reaction, enhanced heat transfer, liquid/liquid reaction and other processes. However, the conventional static mixer is only suitable for two or more working conditions with similar flow rates or small flow difference due to the limitation of the feeding position, and for the wastewater treatment industry, the usage amount of the medicament is 0.01% -1% of the mass of the wastewater, and meanwhile, the feeding causes uneven mixing due to the large difference of the flow rates of two flows of the wastewater, so that the mixing effect is influenced.

Disclosure of Invention

The invention aims to provide a mixing treatment device for electroplating wastewater, which adopts a sectional feeding and partial reflux mode of mixed liquid, can effectively avoid the problems of uneven mixing and influence on the mixing effect caused by large difference of different fluid flow rates in the traditional static mixer, improves the mixing efficiency, is superior to the traditional treatment mode of a mixing tank with a mechanical stirrer, and has higher application value.

The purpose of the invention is realized by the following technical scheme:

a mixed treatment device for electroplating wastewater is an S-shaped mixed treatment device formed by connecting at least 4 square pipes 1 on the same horizontal plane in series; a wastewater inlet 2 and a mixed liquid outlet 3 are respectively arranged at the two ends of the mixing treatment device; at least 3 medicament inlets 4 are arranged on at least 1 square tube from the wastewater inlet end; a plurality of first liquid retaining devices 8 which are symmetrical up and down are arranged in the square tube 1, a splayed channel is formed in the fluid direction, and fluid enters the splayed channel from the open end and improves the flow velocity in the channel; along the fluid direction, a second liquid baffle 9 which is symmetrical up and down is arranged on the outlet side of the splayed channel to form a herringbone liquid baffle, and the included angle of the herringbone liquid baffle back to the fluid causes the fluid to be separated and generate bidirectional spiral backflow; the mixed processing device is provided with 1-3 return pipes 7, the return pipes are positioned between the tail ends of the 1+ n square pipes and the front ends of the n square pipes, wherein n is 1, 2 or 3.

Preferably, the electroplating wastewater mixing device is formed by connecting 5 square pipes on the same horizontal plane in series.

Preferably, the medicament inlet pipeline is provided with an infusion pump for controlling the medicament flow.

Preferably, at least 3 medicament inlets 4 are respectively arranged on the 1 st to the 3 rd square tubes from the wastewater inlet end.

Preferably, the included angle of the splayed channel is 60 degrees; the included angle of the herringbone liquid baffle is 90 degrees.

Preferably, the included angle of the splayed channel from the herringbone liquid baffle is 1-3 cm.

Preferably, the upper and lower first liquid baffle plates 8 constituting the "splayed" passage are fixed by the upper and lower inner walls of the square pipe, respectively, but have a gap with the front and rear inner walls of the square pipe. The upper and lower second liquid baffles 9 forming the inverted V-shaped liquid 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. Through the clearance design of first fender liquid board 8, second fender liquid board 9 and the preceding, back lateral wall of square pipe, can avoid having the dead angle in square pipe, cause solid deposition.

Preferably, the gap between the first liquid baffle 8 and the side wall corresponding to the square tube is 1/20-1/15 of the width of the splayed channel, and the gap between the second liquid baffle 9 and the side wall corresponding to the square tube is 1/20-1/15 of the width of the splayed liquid baffle.

Preferably, the return pipe 7 is provided with an infusion pump, and the return flow is controlled to be 1/6-1/4 of the feeding flow by the infusion pump.

Preferably, the mixing processing device set up 3 back pipes, the back pipe be located 2 the end of square pipe and between the 1 st square pipe front end, 3 the end of square pipe and 2 nd square pipe front end, 4 the end of square pipe and 3 rd square pipe front end respectively.

The mixed treatment is carried out by adopting the mixed treatment device for the electroplating wastewater, and the operation steps are as follows: continuously conveying the electroplating wastewater into a mixing treatment device through an infusion pump; the medicines are fed in sections and enter the mixing treatment device from the medicine inlet 4 through the infusion pump according to the set flow; fluid enters the splayed channel from the open end, the flow velocity of the fluid is increased in the channel, and the fluid quickly impacts the splayed liquid baffle plate to separate the fluid and generate bidirectional spiral backflow; in the mixing process, the reflux of the mixed liquid is controlled, and the mixing effect is further improved. The mixed liquor is finally discharged from the mixed liquor outlet 3.

Compared with the prior art, the invention has the beneficial effects that:

the invention is improved on the basis of a static mixer, adopts a mode of feeding in sections and partial reflux of mixed liquid, and arranges a first liquid baffle plate in the square tube to form an inverted V-shaped channel, and arranges a second liquid baffle plate to form an inverted V-shaped liquid baffle plate, wherein the inverted V-shaped channel mixes the fluid, the fluid speed is increased, and the inverted V-shaped liquid baffle plate backs on the fluid to separate the fluid and generate bidirectional spiral reflux. The mixing treatment device can effectively avoid the problems of uneven mixing and influence on the mixing effect caused by the large difference of the flow rates of different fluids in the traditional static mixer, improve the mixing efficiency and improve the degree of continuity. Meanwhile, the liquid baffle plates forming the splayed channel and the herringbone liquid baffle plates are not connected with the pipe walls on the two sides of the square pipe, so that dead angles are avoided, solid deposition is avoided, and equipment is prevented from being polluted and blocked. The mixing treatment device can replace the traditional mechanical stirring and mixing mode, is suitable for a physicochemical treatment unit in the electroplating wastewater treatment industry, and is particularly suitable for the condition that two or more materials with larger flow difference are fed simultaneously.

The mixed treatment device is convenient to disassemble and move, reduces the occupied area of equipment, and solves the problem of limited site of wastewater treatment factories.

Drawings

FIG. 1 is a schematic structural view of a mixed treatment apparatus for electroplating wastewater according to the present invention;

FIG. 2 is a schematic view of the internal structure of a square tube;

fig. 3 is a schematic structural view of the first liquid baffle and the second liquid baffle.

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

Detailed Description

The technical solution of the present invention is further explained by the following embodiments.

Example 1

As shown in fig. 1-3, a mixed treatment device for electroplating wastewater is an S-shaped mixed treatment device formed by sequentially connecting 5 square pipes 1 end to end on the same horizontal plane, wherein the 5 square pipes are a 1 st square pipe, a 2 nd square pipe, a 3 rd square pipe, a 4 th square pipe and a 5 th square pipe in sequence from a wastewater inlet end; a wastewater inlet 2 and a mixed liquid outlet 3 are respectively arranged at the two ends of the mixing treatment device; 3 medicament inlets 4 are respectively arranged on the 1 st, the 2 nd and the 3 rd square pipes; a plurality of first liquid retaining devices 8 which are symmetrical up and down are arranged in the square tube 1, a splayed channel is formed in the fluid direction, and fluid enters the splayed channel from the open end and improves the flow velocity in the channel; along the fluid direction, a second liquid baffle 9 which is symmetrical up and down is arranged on the outlet side of the splayed channel to form a herringbone liquid baffle, and the included angle of the herringbone liquid baffle back to the fluid causes the fluid to be separated and generate bidirectional spiral backflow; the end at 2 square pipe, the end of 3 square pipe, the end of 4 square pipe sets up mixed liquid backward flow export 5 respectively, the front end at 1 square pipe, the front end of 2 square pipe, the front end of 3 square pipe sets up mixed liquid backward flow import 6 respectively, between the end of 2 square pipe and 1 square pipe front end respectively, between the end of 3 square pipe and 2 square pipe front end, set up the back flow pipe 7 between the end of 4 square pipe and 3 square pipe front end, be equipped with 1/6 ~ 1/4 that infusion pump control return flow is feed flow on the back flow pipe 7.

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

The included angle of the splayed channel is 60 degrees; the included angle of the herringbone liquid baffle is 90 degrees.

The splayed channel has an included angle of 1-3 cm with the herringbone liquid baffle.

The upper and lower first liquid baffle plates 8 forming the splayed channel are fixed by the upper and lower inner walls of the square tube respectively, but have gaps with the front and rear inner walls of the square tube, and the gap between the first liquid baffle plate 8 and the corresponding side wall of the square tube is 1/20 with the width of the splayed channel.

The upper and lower second liquid baffles 9 forming the herringbone liquid baffle are fixed by the upper and lower inner walls of the square tube respectively, but gaps are reserved between the upper and lower inner walls and the front and rear inner walls of the square tube, and the gaps between the second liquid baffles 9 and the corresponding side walls of the square tube are 1/20 of the width of the herringbone liquid baffle.

Adopt this embodiment electroplating effluent mixed treatment device to carry out mixed treatment, the operating procedure is: continuously conveying the electroplating wastewater into a mixing treatment device through an infusion pump; the medicines are fed in sections and enter the mixing treatment device from the medicine inlet 4 through the infusion pump according to the set flow; after entering the mixing treatment device, the fluid enters the splayed channel from the open end, the flow velocity of the fluid is increased in the channel, and the fluid quickly impacts the herringbone liquid baffle plate to separate the fluid and generate bidirectional spiral backflow; in the mixing process, the reflux of the mixed liquid is controlled, and the mixing effect is further improved. The mixed liquor is finally discharged from the mixed liquor outlet 3.

Claims

1. A mixed treatment device for electroplating wastewater is characterized in that the device is an S-shaped mixed treatment device formed by connecting at least 4 square pipes (1) on the same horizontal plane in series; a wastewater inlet (2) and a mixed liquid outlet (3) are respectively arranged at the two ends of the mixing treatment device; at least 1 square tube is provided with at least 3 medicament inlets (4) from the wastewater inlet end; a plurality of first liquid baffles (8) which are symmetrical up and down are arranged in the square tube (1), a splayed channel is formed in the fluid direction, and fluid enters the splayed channel from the open end to improve the flow velocity in the channel; along the fluid direction, a second liquid baffle (9) which is symmetrical up and down is arranged on the outlet side of the splayed channel to form a herringbone liquid baffle, and the included angle of the herringbone liquid baffle back to the fluid causes the fluid to be separated and generate bidirectional spiral backflow; the mixed processing device is provided with 1-3 return pipes (7), wherein the return pipes are positioned between the tail ends of the 1+ n square pipes and the front ends of the n square pipes, and n is 1, 2 or 3.

2. The mixed treatment apparatus for electroplating wastewater according to claim 1, wherein the mixed treatment apparatus for electroplating wastewater is formed by connecting 5 square pipes in series on the same horizontal plane.

3. The mixed treatment apparatus for electroplating wastewater according to claim 1, wherein at least 3 reagent inlets (4) are respectively arranged on the 1 st to 3 rd square tubes from the wastewater inlet end.

4. The mixed treatment device of electroplating wastewater according to claim 1, characterized in that the included angle of the splayed channel is 60 °; the included angle of the herringbone liquid baffle is 90 degrees.

5. The mixed treatment device for the electroplating wastewater according to claim 1, wherein the distance between the splayed channel and the herringbone liquid baffle is 1-3 cm.

6. The mixed treatment device of the electroplating wastewater according to the claim 1, characterized in that the upper and the lower first liquid baffle plates (8) forming the splayed channel are respectively fixed by the upper and the lower inner walls of the square tube, but have a gap with the front and the rear inner walls of the square tube; the gap between the first liquid baffle (8) and the corresponding side wall of the square tube is 1/20-1/15 of the width of the splayed channel.

7. The mixed treatment device of the electroplating wastewater according to the claim 1, characterized in that the upper and the lower second baffles (9) forming the liquid baffle in the shape of the Chinese character 'ren' are respectively fixed by the upper and the lower inner walls of the square tube, but a gap is left between the upper and the lower inner walls; and the gap between the second liquid baffle (9) and the corresponding side wall of the square tube is 1/20-1/15 of the width of the herringbone liquid baffle.

8. The mixed treatment apparatus for electroplating wastewater according to claim 1, wherein the return pipe (7) is provided with an infusion pump.

9. The mixed treatment device of the electroplating wastewater according to claim 1, characterized in that the mixed treatment device is provided with 3 return pipes, and the return pipes are respectively positioned between the tail end of the 2 nd square pipe and the front end of the 1 st square pipe, between the tail end of the 3 rd square pipe and the front end of the 2 nd square pipe, and between the tail end of the 4 th square pipe and the front end of the 3 rd square pipe.