Special device for treating chromium-containing electroplating wastewater

Abstract

The utility model is applicable to the technical field of wastewater treatment, and provides a special device for treating chromium-containing electroplating wastewater, which comprises a base, a plurality of support columns are fixedly connected onto the base, cross beams are fixedly connected to the middle parts of the plurality of support columns, the other ends of the plurality of cross beams are fixedly connected with the same support ring, and the support ring is fixedly connected with the base. A shell is placed at the upper ends of the multiple cross beams, a liquid outlet pipe is arranged at the bottom of the side face of the shell, a stirring assembly is fixedly arranged in the middle of an inner cavity of the shell, a supporting assembly is fixedly arranged at the bottom end of the inner cavity of the shell and located between the inner wall of the shell and the stirring assembly, and a left top cover is fixedly connected to the left side of the upper end of the shell. The right side of the upper end of the shell is fixedly connected with a right top cover, and the left top cover is fixedly connected with a feeding pipe and a liquid inlet pipe. The device has the advantages that the influence of wastewater on the environment is reduced, various heavy metal ions can be treated at the same time, and the device is simple in structure, convenient to operate and low in cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of wastewater treatment, and in particular relates to a special device for treating chromium-containing electroplating wastewater. Background Art

[0002] In the electroplating industry, the treatment of chromium-containing wastewater has always been an important environmental issue. With increasingly stringent environmental regulations, how to efficiently treat these chromium-containing wastewaters to reduce the impact on the environment has become an urgent problem to be solved in the industry.

[0003] The use of chemical precipitation to treat chromium-containing electroplating wastewater is mainly based on chemical principles. By adding chemical agents, harmful substances in the wastewater react with the agents to generate harmless or low-harm substances, or to separate harmful substances from the wastewater. This device usually consists of three stages: pretreatment, reaction and post-treatment. In the pretreatment stage, the chromium-containing electroplating wastewater needs to be initially treated, including removing large particles of suspended matter, grease and other impurities for subsequent reaction and precipitation. In the reaction stage, chemical agents such as reducing agents and precipitants need to be added to the wastewater to reduce the hexavalent chromium ions in the wastewater to trivalent chromium ions and form precipitation with other heavy metal ions. In the post-treatment stage, the precipitated wastewater needs to be further treated, including neutralization, filtration and other operations, so that the wastewater meets the national emission standards. The traditional comprehensive treatment process of electroplating wastewater is mainly composed of a coagulation reaction tank and a sedimentation tank to achieve graded treatment of electroplating wastewater, and the device and operation are relatively complex.

[0004] Therefore, in view of the above situation, there is an urgent need to develop a special device for treating chromium-containing electroplating wastewater to overcome the shortcomings in current practical applications. Utility Model Content

[0005] The purpose of the embodiment of the utility model is to provide a special device for treating chromium-containing electroplating wastewater, aiming to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A special device for treating chromium-containing electroplating wastewater, comprising a base, a plurality of pillars fixedly connected to the base, a plurality of crossbeams fixedly connected to the middle of the plurality of pillars, a plurality of crossbeams fixedly connected to the same supporting ring at the other end, a shell placed on the upper end of the plurality of crossbeams, a waste liquid pipe fixedly connected to the bottom of the shell, the waste liquid pipe passing through a through hole opened in the middle of the supporting ring, the waste liquid pipe being used to discharge dirt when cleaning the inside of the shell, a liquid outlet pipe being provided at the bottom of the side of the shell, the liquid outlet pipe being used to transport the treated electroplating wastewater to the lower A process, a stirring assembly is fixedly arranged in the middle of the inner cavity of the shell, and the stirring assembly is used to promote the progress of the chemical reaction and mix the reactants evenly. A supporting assembly is fixedly arranged on the bottom end of the inner cavity of the shell, and the supporting assembly is located between the inner wall of the shell and the stirring assembly. A left top cover is fixedly connected to the left side of the upper end of the shell, and a right top cover is fixedly connected to the right side of the upper end of the shell. The right top cover is fixedly connected to the top edge of the shell by snap-locking, and the right top cover is rotatably connected to the left top cover. A feeding pipe and a liquid inlet pipe are fixedly connected to the left top cover.

[0008] According to a further technical solution, the stirring assembly includes a motor, a rotating shaft and paddles; a motor is fixedly connected to the upper end of the left top cover, a driving shaft of the motor passes through the left top cover, and the driving shaft of the motor is fixedly connected to the rotating shaft, the rotating shaft is located in the middle of the inner cavity of the shell, and a plurality of paddles are fixedly connected to the shell, and the plurality of paddles are evenly distributed.

[0009] According to a further technical solution, the support assembly includes a first fixing rod, a second fixing rod, a first ring and a second ring; a plurality of first fixing rods are fixedly connected to the bottom end of the inner cavity of the shell, the plurality of first fixing rods are evenly distributed in a circle, the upper ends of the plurality of first fixing rods are fixedly connected to the same first ring, and a plurality of second fixing rods are also fixedly connected to the bottom end of the inner cavity of the shell, the plurality of second fixing rods are evenly distributed in a circle, the upper ends of the plurality of first fixing rods are fixedly connected to the same second ring, and the second ring is concentric with the first ring.

[0010] According to a further technical solution, a first filter element is placed between the second circular ring and the first circular ring, and a second filter element is placed between the second circular ring and the inner wall of the shell.

[0011] According to a further technical solution, the first filter element and the second filter element are both formed by abutting multiple filter structures.

[0012] According to a further technical solution, both the waste liquid pipe and the liquid inlet pipe are L-shaped.

[0013] According to a further technical solution, the upper end of the feeding pipe is threadedly connected with a feeding cap, and the end of the waste liquid pipe is threadedly connected with a waste liquid cap.

[0014] In summary, the embodiments of the present invention have the following beneficial effects compared with the prior art:

[0015] 1. It can reduce hexavalent chromium ions in wastewater into trivalent chromium ions with relatively less harmful effects, thus reducing the impact on the environment;

[0016] 2. Can treat multiple heavy metal ions at the same time;

[0017] 3. The device has simple structure, convenient operation and low cost;

[0018] 4. The wastewater after sedimentation can be further treated by neutralization, filtration, etc. to meet national emission standards.

[0019] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0021] Figure 2 This is a bottom-up three-dimensional structural schematic diagram of the utility model;

[0022] Figure 3 It is a three-dimensional structural schematic diagram of the internal structure of the utility model;

[0023] Figure 4 It is a three-dimensional structural schematic diagram of the internal structure of the utility model from another perspective.

[0024] In the figure: 1-base, 2-pillar, 3-beam, 4-shell, 5-left top cover, 6-right top cover, 7-feeding pipe, 8-feeding cover, 9-motor, 10-snap, 11-liquid inlet pipe, 12-liquid outlet pipe, 13-waste liquid pipe, 14-rotating shaft, 15-paddle, 16-first fixed rod, 17-second fixed rod, 18-first ring, 19-second ring, 20-first filter element, 21-second filter element, 22-support ring, 23-waste liquid cover. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0026] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0027] like Figure 1-4As shown, the embodiment of the utility model provides a special device for treating chromium-containing electroplating wastewater, including a base 1, a plurality of pillars 2 are fixedly connected to the base 1, a plurality of the middle parts of the pillars 2 are fixedly connected to a beam 3, the other ends of the plurality of the beams 3 are fixedly connected to the same supporting ring 22, a shell 4 is placed on the upper ends of the plurality of beams 3, a waste liquid pipe 13 is fixedly connected to the bottom of the shell 4, the waste liquid pipe 13 passes through a through hole opened in the middle of the supporting ring 22, the waste liquid pipe 13 is used to discharge dirt when cleaning the inside of the shell 4, a liquid outlet pipe 12 is provided at the bottom of the side of the shell 4, the liquid outlet pipe 12 is used to discharge the treated The treated electroplating wastewater is transported to the next process. A stirring component is fixedly arranged in the middle of the inner cavity of the shell 4, and the stirring component is used to promote the chemical reaction and mix the reactants evenly. A supporting component is fixedly arranged on the bottom end of the inner cavity of the shell 4, and the supporting component is located between the inner wall of the shell 4 and the stirring component. A left top cover 5 is fixedly connected to the left side of the upper end of the shell 4, and a right top cover 6 is fixedly connected to the right side of the upper end of the shell 4. The right top cover 6 is fixedly connected to the top edge of the shell 4 by a snap lock 10, and the right top cover 6 is rotatably connected to the left top cover 5. A feeding pipe 7 and a liquid inlet pipe 11 are fixedly connected to the left top cover 5.

[0028] It can be understood that the feeding pipe 7 is used to add chemical agents to reduce the hexavalent chromium ions in the wastewater to trivalent chromium ions and form precipitation with other heavy metal ions, and the liquid inlet pipe 11 is used to receive the wastewater transported by the previous process.

[0029] like Figure 3 As shown, specifically, the stirring assembly includes a motor 9, a rotating shaft 14 and a paddle 15; the upper end of the left top cover 5 is fixedly connected to the motor 9, the driving shaft of the motor 9 passes through the left top cover 5, and the driving shaft of the motor 9 is fixedly connected to the rotating shaft 14, the rotating shaft 14 is located in the middle of the inner cavity of the shell 4, and a plurality of paddles 15 are fixedly connected to the shell 4, and the plurality of paddles 15 are evenly distributed.

[0030] In specific application, the motor 9 is started, and the motor 9 drives the rotating shaft 14 to rotate through the driving shaft, and then the rotating shaft 14 drives the paddle 15 to rotate, so as to stir the chromium-containing electroplating wastewater. The stirring of the wastewater is mainly to promote the chemical reaction and make the reactants mixed as evenly as possible to improve the treatment effect and efficiency.

[0031] like Figure 3 and Figure 4As shown, specifically, the support assembly includes a first fixing rod 16, a second fixing rod 17, a first ring 18 and a second ring 19; a plurality of first fixing rods 16 are fixedly connected to the bottom end of the inner cavity of the shell 4, the plurality of first fixing rods 16 are evenly distributed in a circle, the upper ends of the plurality of first fixing rods 16 are fixedly connected to the same first ring 18, and a plurality of second fixing rods 17 are also fixedly connected to the bottom end of the inner cavity of the shell 4, the plurality of second fixing rods 17 are evenly distributed in a circle, the upper ends of the plurality of first fixing rods 17 are fixedly connected to the same second ring 19, and the second ring 19 and the first ring 18 are concentric circles.

[0032] Furthermore, a first filter element 20 is placed between the second circular ring 19 and the first circular ring 18 , and a second filter element 21 is placed between the second circular ring 19 and the inner wall of the housing 4 .

[0033] Furthermore, the first filter element 20 and the second filter element 21 are both formed by abutting multiple filter structures.

[0034] Furthermore, the waste liquid pipe 13 and the liquid inlet pipe 11 are both L-shaped.

[0035] Furthermore, the upper end of the feeding pipe 7 is threadedly connected to a feeding cap 8 , and the end of the waste liquid pipe 13 is threadedly connected to a waste liquid cap 23 .

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A special device for treating chromium-containing electroplating wastewater, comprising a base, to which a plurality of pillars are fixedly connected, characterized in that: A crossbeam is fixedly connected to the middle of the plurality of pillars, and the other ends of the plurality of crossbeams are fixedly connected to the same supporting ring. A shell is placed on the upper ends of the plurality of crossbeams, and a waste liquid pipe is fixedly connected to the bottom of the shell, and the waste liquid pipe passes through a through hole opened in the middle of the supporting ring. The waste liquid pipe is used to discharge dirt when cleaning the inside of the shell. A liquid outlet pipe is provided at the bottom of the side of the shell, and the liquid outlet pipe is used to transport the treated electroplating wastewater to the next process. A stirring assembly is fixedly arranged in the middle of the inner cavity of the shell, and the stirring assembly is used to promote the progress of chemical reactions and mix the reactants evenly. A supporting assembly is fixedly arranged on the bottom end of the inner cavity of the shell, and the supporting assembly is located between the inner wall of the shell and the stirring assembly. A left top cover is fixedly connected to the left side of the upper end of the shell, and a right top cover is fixedly connected to the right side of the upper end of the shell. The right top cover is fixedly connected to the top edge of the shell by snap-locking, and the right top cover is rotatably connected to the left top cover, and a feeding pipe and a liquid inlet pipe are fixedly connected to the left top cover.

2. The special device for treating chromium-containing electroplating wastewater according to claim 1, characterized in that: The stirring assembly includes a motor, a rotating shaft and a paddle; A motor is fixedly connected to the upper end of the left top cover, the driving shaft of the motor passes through the left top cover, and the driving shaft of the motor is fixedly connected to a rotating shaft, the rotating shaft is located in the middle of the inner cavity of the shell, and a plurality of paddles are fixedly connected to the shell, and the plurality of paddles are evenly distributed.

3. The special device for treating chromium-containing electroplating wastewater according to claim 1, characterized in that: The support assembly includes a first fixing rod, a second fixing rod, a first circular ring and a second circular ring; A plurality of first fixing rods are fixedly connected to the bottom end of the inner cavity of the shell, and the plurality of first fixing rods are evenly distributed in a circle, and the upper ends of the plurality of first fixing rods are fixedly connected to the same first circular ring; a plurality of second fixing rods are also fixedly connected to the bottom end of the inner cavity of the shell, and the plurality of second fixing rods are evenly distributed in a circle, and the upper ends of the plurality of first fixing rods are fixedly connected to the same second circular ring, and the second circular ring is concentric with the first circular ring.

4. The special device for treating chromium-containing electroplating wastewater according to claim 3, characterized in that: A first filter element is placed between the second circular ring and the first circular ring, and a second filter element is placed between the second circular ring and the inner wall of the shell.

5. The special device for treating chromium-containing electroplating wastewater according to claim 4, characterized in that: The first filter element and the second filter element are both formed by abutting multiple filter structures.

6. The special device for treating chromium-containing electroplating wastewater according to claim 1, characterized in that: The waste liquid pipe and the liquid inlet pipe are both L-shaped.

7. The dedicated device for treating chromium-containing electroplating wastewater according to claim 1, characterized in that: The upper end of the feeding pipe is threadedly connected with a feeding cap, and the end of the waste liquid pipe is threadedly connected with a waste liquid cap.

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