Electroplating wastewater evaporation treatment system

Abstract

The utility model discloses an electroplating wastewater evaporation treatment system and relates to the technical field of sewage treatment. The device comprises an evaporator, a heat exchanger and a condenser, the heat exchanger is connected with an industrial waste gas pipeline to obtain industrial waste heat, the heat exchanger transmits the waste heat to the evaporator to evaporate electroplating wastewater, and the condenser is used for condensing water vapor into water. Waste heat of industrial waste gas is guided into the evaporator through the heat exchanger, evaporation separation can be achieved, the purpose of low energy consumption can be achieved, the inner diameter of the spiral pipe is arranged to be fixedly attached to the inner wall of the evaporation tank, the outer wall of the evaporation tank can be heated, the effect of heating the evaporation tank is achieved, and the evaporation effect of the evaporation tank is better.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to an electroplating wastewater evaporation treatment system. Background Technology

[0002] With rapid economic development, the discharge of industrial wastewater, especially electroplating wastewater, has continued to increase. In addition to heavy metals such as Cr, Cu, and Ni, electroplating wastewater also contains alkaline and acidic substances, as well as highly toxic cyanide compounds, posing a significant threat to the environment and human health. Therefore, effective treatment technology for electroplating wastewater is crucial for reducing environmental pollution.

[0003] Evaporation separation technology is a common method for treating electroplating wastewater. This technology utilizes the principle of evaporation to remove water from the wastewater, concentrating and separating harmful substances, thereby achieving wastewater treatment and resource recycling. The concentration of electroplating wastewater generated in enterprises or factories is approximately within 15%. A comprehensive comparison shows that among current traditional treatment methods, only evaporation can effectively achieve "zero discharge" of electroplating wastewater.

[0004] Traditional evaporation separation devices still suffer from high energy consumption, failing to simultaneously achieve both "zero wastewater discharge" and high energy efficiency. Evaporation separation devices all rely on water evaporation, which requires a significant amount of latent heat. Therefore, current evaporation separation devices using traditional energy sources all suffer from high energy consumption. Developing an electroplating wastewater treatment device that can achieve both "zero wastewater discharge" and ensure highly efficient and energy-saving operation is a major challenge in current wastewater treatment.

[0005] To address the aforementioned problems, this application provides an electroplating wastewater evaporation treatment system. Utility Model Content

[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0007] An electroplating wastewater evaporation treatment system includes an evaporator, a heat exchanger, and a condenser. The heat exchanger is connected to an industrial waste gas pipeline to obtain industrial waste heat. The heat exchanger transfers the waste heat to the evaporator to evaporate the electroplating wastewater. The condenser is used to condense water vapor into water.

[0008] Furthermore, the heat exchanger includes a housing and heat exchange tubes. The housing has a ventilation duct, which is bendable and the heat exchange tubes are constructed accordingly. The housing has an air inlet and an air outlet, which are respectively connected to the two ends of the ventilation duct.

[0009] Furthermore, the evaporator includes an evaporation tank for holding electroplating wastewater. A three-way pipe is connected to the upper side of the evaporation tank. Valves are installed on two pipes on the three-way pipe. One of the pipes is connected to one end of a heat exchange tube through a pipeline. A pipe valve is connected to the bottom of the evaporation tank. The end of the pipe valve is connected to the other end of the heat exchange tube through a pipeline, and a diaphragm pump is connected to the pipeline.

[0010] Furthermore, the air inlet is connected to an industrial waste gas pipeline, a spiral tube is wound around the outer wall of the evaporator and the inner diameter of the spiral tube is fixedly close to the inner wall of the evaporator, the air outlet is connected to one end of the spiral tube, and the other end of the spiral tube is connected to an activated carbon adsorption component.

[0011] Furthermore, the activated carbon adsorption assembly includes an adsorption box and a support rod fixed to the bottom of the adsorption box and the top of the box. The adsorption box is tightly filled with activated carbon, and the top of the adsorption box is set as a grid.

[0012] Furthermore, the condenser includes a condensing sleeve fixed to the top of the housing by a bracket. A cold water pipe is installed inside the condensing sleeve, and the two ends of the cold water pipe converge into an inlet pipe and an outlet pipe. An air inlet and a liquid outlet communicating with the interior are constructed on the outer wall of the condensing sleeve. The air inlet is connected to the top of the evaporator through a pipe.

[0013] Furthermore, an exhaust pump is connected to the air inlet, which is used to guide the waste heat gas in the industrial waste gas pipeline into the ventilation duct.

[0014] The beneficial effects of this utility model are as follows:

[0015] This invention uses a heat exchanger to introduce the waste heat of industrial waste gas into an evaporator, thereby achieving evaporation and separation, which can achieve the goal of low energy consumption.

[0016] This invention uses a zigzag-shaped ventilation duct to increase its length, allowing the heat exchange tubes of the corresponding shape to have a longer contact time with the industrial waste gas, thus increasing the heat exchange efficiency of the heat exchange tubes.

[0017] This invention features a spiral tube with its inner diameter fixed tightly against the inner wall of the evaporator, which heats the outer wall of the evaporator, thus improving the evaporation effect. Attached Figure Description

[0018] Figure 1 This is a perspective view of the utility model;

[0019] Figure 2 This is a perspective view of the present invention from another angle;

[0020] Figure 3 This is a top view of the present invention;

[0021] Figure 4 This is a three-dimensional view of part of the structure of this utility model;

[0022] Figure 5 This is a three-dimensional view of the internal structure of the condenser of this utility model;

[0023] Figure 6 This is a cross-sectional view of the adsorption box of this utility model;

[0024] Reference numerals: 1. Evaporator; 11. Evaporator tank; 12. T-junction; 13. Pipe valve; 14. Diaphragm pump; 2. Heat exchanger; 21. Housing; 22. Heat exchange tube; 23. Ventilation duct; 24. Air inlet; 25. Air outlet; 3. Condenser; 31. Condensing sleeve; 32. Cold water pipe; 33. Water inlet pipe; 34. Water outlet pipe; 35. Air inlet; 36. Liquid outlet; 4. Spiral tube; 5. Activated carbon adsorption assembly; 51. Adsorption box; 52. Support rod; 53. Activated carbon; 54. Grid. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0026] This embodiment provides an electroplating wastewater evaporation treatment system, mainly used to solve the problem of high energy consumption in traditional evaporation separation devices, and provides the following technical solution, which will be combined with... Figures 1-6 Please provide a detailed explanation:

[0027] An electroplating wastewater evaporation treatment system includes an evaporator 1, a heat exchanger 2, and a condenser 3. The heat exchanger 2 is connected to an industrial waste gas pipeline to obtain industrial waste heat. The heat exchanger 2 transfers the waste heat to the evaporator 1 to evaporate the electroplating wastewater. The condenser 3 is used to condense water vapor into water. The waste heat of the industrial waste gas is introduced into the evaporator 1 through the heat exchanger 2, thereby achieving evaporation and separation. This system can achieve the purpose of low energy consumption (by utilizing the waste heat of the industrial waste gas, which is a waste utilization).

[0028] The heat exchanger 2 includes a housing 21 and heat exchange tubes 22. The housing 21 has a ventilation duct 23, which is bend-like in shape, and the heat exchange tubes 22 are constructed accordingly. (See attached text.) Figure 3 and Figure 4Setting the ventilation duct 23 in a bend-like shape can increase the length of the ventilation duct 23, so that the heat exchange tube 22 with the corresponding shape can be in contact with the industrial waste gas for a longer time. This can make the heat exchange tube 22 more efficient. At the same time, in order to allow the industrial waste gas to be introduced into the box 21, the box 21 is provided with an air inlet 24 and an air outlet 25, which are respectively connected to the two ends of the ventilation duct 23.

[0029] The evaporator 1 includes an evaporator tank 11 for holding electroplating wastewater. A three-way pipe 12 is connected to the upper side of the evaporator tank 11. Valves are installed on two pipes on the three-way pipe 12. One pipe is connected to one end of the heat exchange tube 22 through a pipeline. The other pipe of the three-way pipe 12 can be used to introduce electroplating wastewater (for subsequent addition of electroplating wastewater). Under normal circumstances, the valve of this pipe is closed. In order to allow the wastewater in the evaporator tank 11 to circulate into the housing 21 to obtain heat, a pipe valve 13 is connected to the bottom of the evaporator tank 11. In addition to discharging wastewater, the pipe valve 13 can also be opened to discharge highly concentrated wastewater after a period of time. At the same time, in order to achieve circulation, the end of the pipe valve 13 is connected to the other end of the heat exchange tube 22 through a pipeline, and a diaphragm pump 14 is connected to the pipeline. The diaphragm pump 14 circulates and draws the wastewater in the evaporator tank 11 into the heat exchange tube 22.

[0030] The condenser 3 includes a condenser sleeve 31 fixed to the top of the housing 21 by a bracket. A cold water pipe 32 is installed inside the condenser sleeve 31, and the two ends of the cold water pipe 32 converge into an inlet pipe 33 and an outlet pipe 34. The cold water pipe 32 is used for cold water circulation, the inlet pipe 33 is used to connect to an external water pipe, and the outlet pipe 34 is used to discharge cooling water. The outer wall of the condenser sleeve 31 is constructed with an air inlet 35 and a liquid outlet 36 that communicate with its interior. The air inlet 35 is connected to the top of the evaporator 11 through a pipe. When the water vapor in the evaporator 11 reaches the condenser sleeve 31 through the air inlet 35, it comes into contact with the cold water pipe 32 and condenses into water droplets, which drip out through the air outlet pipe, thus realizing the function of evaporation and separation. It should be noted that the condenser 3 is existing technology and will not be elaborated on here.

[0031] like Figure 1 , Figure 2 As shown, in another embodiment of this application, in order to make the waste heat of the industrial waste gas passing through the heat exchange tube 22 still useful, the air inlet 24 is connected to the industrial waste gas pipeline, and a spiral tube 4 is wound around the outer wall of the evaporator 11, with the inner diameter of the spiral tube 4 fixed and tightly attached to the inner wall of the evaporator 11. When the waste gas with little residual heat passes through the spiral tube 4, it can heat the outer wall of the evaporator 11, thereby heating the evaporator 11 and making the evaporator 11 more efficient. At the same time, the air outlet 25 is connected to one end of the spiral tube 4, and the other end of the spiral tube 4 is connected to an activated carbon adsorption component 5.

[0032] In this embodiment, the activated carbon adsorption assembly 5 includes an adsorption box 51 and a support rod 52 fixed to the bottom of the adsorption box 51 and the top of the box body 21. The adsorption box 51 is tightly filled with activated carbon 53, and the top of the adsorption box 51 is set as a grid 54. By filling the adsorption box 51 with activated carbon 53, the adsorption and purification effect is achieved when the industrial waste gas is discharged. It should be noted that the industrial waste gas has already been treated by professional equipment when it is discharged. This application only utilizes the residual heat and performs adsorption treatment again.

[0033] In this embodiment, an exhaust pump is connected to the air inlet 24. The exhaust pump is used to guide the waste heat gas in the industrial waste gas pipeline into the ventilation duct 23. The reason for setting the exhaust pump is to ensure that the industrial waste gas has a sufficient flow rate after entering the ventilation duct 23, so as to avoid the entrapment of gas due to no flow rate.

[0034] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electroplating wastewater evaporation treatment system, characterized by, It includes evaporator (1), heat exchanger (2), condenser (3), the heat exchanger (2) is connected with industrial waste gas pipeline to obtain industrial waste heat, the heat exchanger (2) transmits waste heat to evaporator (1) to evaporate electroplating wastewater, the condenser (3) is used to condense water vapor into water, the heat exchanger (2) includes tank (21), heat exchange pipe (22), the tank (21) is internally structured with ventilation channel (23), the ventilation channel (23) is in the shape of a meandering and heat exchange pipe (22) is structured in correspondence with its shape, the tank (21) is provided with air inlet (24), air outlet (25), the air inlet (24), air outlet (25) are respectively correspondingly connected with the two ends of ventilation channel (23).

2. The electroplating wastewater evaporation treatment system according to claim 1, wherein, The evaporator (1) includes the evaporation tank (11) for containing electroplating wastewater, the evaporation tank (11) is connected with three-way pipe (12) on the side upper end, the two pipelines on the three-way pipe (12) are both equipped with valves, one of which is connected with one end of heat exchange pipe (22) through pipeline, the bottom of evaporation tank (11) is connected with pipe valve (13), the end of pipe valve (13) is connected with the other end of heat exchange pipe (22) through pipeline and is connected with diaphragm pump (14) on the pipeline.

3. The electroplating wastewater evaporation treatment system according to claim 2, wherein, The air inlet (24) is connected with industrial waste gas pipeline, the outer wall of evaporation tank (11) is provided with spiral pipe (4) and the inner diameter of spiral pipe (4) is fixedly close to the inner wall of evaporation tank (11), the air outlet (25) is connected with one end of spiral pipe (4), the other end of spiral pipe (4) is provided with activated carbon adsorption assembly (5).

4. The electroplating wastewater evaporation treatment system according to claim 3, characterized in that, The activated carbon adsorption assembly (5) includes adsorption tank (51) and support rod (52) fixed on the bottom of adsorption tank (51) and fixed with tank (21) on the top, the adsorption tank (51) is closely filled with activated carbon (53), the top of adsorption tank (51) is provided with grid (54).

5. The electroplating wastewater evaporation treatment system of claim 1, wherein, The condenser (3) includes condensing sleeve (31) fixed on the top of tank (21) through support, the condensing sleeve (31) is provided with cold water pipe (32) and the two ends of cold water pipe (32) converge into one water inlet pipe (33) and one water outlet pipe (34), the outer wall of condensing sleeve (31) is structured with air inlet (35) and liquid outlet (36) communicated with its interior, the air inlet (35) is communicated with the top of evaporation tank (11) through pipeline.

6. The electroplating wastewater evaporation treatment system of claim 1, wherein, The air inlet (24) is connected with exhaust pump, and the exhaust pump is used to guide the waste heat and waste gas in the industrial waste gas pipeline into ventilation channel (23).

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