Source heat pump driven low-concentration electroplating wastewater two-stage treatment device

Abstract

The utility model provides a low-concentration electroplating wastewater two-stage treatment device driven by a source heat pump, which belongs to the field of electroplating wastewater treatment and can operate at medium and low temperature without special equipment through a tower top, a hot air inlet pipeline, a heat source pump, an electroplating wastewater inlet pipeline, a pressure nozzle and a waste gas outlet pipeline. The requirement for sealing performance is low, consumables are few, the requirement for materials is not high, simplicity and convenience are achieved, and the operation cost is low; the device can be used for directly observing the whole evaporation and separation process of the evaporation and separation tower body part, so that unfavorable conditions occurring in the heat and mass transfer process can be conveniently found in time and adjusted and optimized in time; the device treats electroplating wastewater by using air as a separation carrier, and the separation carrier is convenient to obtain and is basically not limited by the environment; the device adopts the visual polyacrylate material tower body which is high in transparency, low in price and easy to machine, and the internal temperature of the tower body is lower than that of the tower top part, so that the problems of softening and deformation of organic glass caused by high temperature and the like are effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of electroplating wastewater treatment, and more specifically, to a two-stage treatment device for low-concentration electroplating wastewater driven by a heat pump. Background Technology

[0002] Electroplating wastewater contains various heavy metal ions, such as zinc, copper, nickel, and cadmium. Its composition is complex and its pollution is strong, making its treatment relatively difficult. Traditional treatment methods for electroplating wastewater can be roughly divided into chemical precipitation, electrochemical methods, adsorption methods, and physical methods, which have been applied in actual production.

[0003] Chemical precipitation is a common method for treating electroplating wastewater. It mainly involves adding chemicals to the wastewater to remove metal ions through chemical reactions that produce precipitates. However, it is difficult to prepare new and efficient precipitating agents, and different precipitating agents are needed for different metal ions. Furthermore, this method generates a large amount of sludge, which requires further treatment and may cause secondary pollution.

[0004] Electrochemical methods enhance chemical reactions during wastewater treatment by applying an electric field, but they consume a lot of electricity and have low energy efficiency. Secondly, they consume a lot of electrode materials, and the preparation of new electrode materials is an urgent problem to be solved. Finally, this method is suitable for electroplating wastewater with a relatively simple composition and cannot achieve complete separation of salt and water in electroplating wastewater.

[0005] Biological methods utilize the characteristic of certain microorganisms to absorb specific metal ions during their metabolism to treat wastewater. The metal ions are then removed by entering the sludge after being metabolized by the microorganisms. However, this method faces challenges such as the selection, cultivation, and survival of microorganisms.

[0006] Evaporation, a physical method, utilizes the principle of phase change in water upon heating to evaporate water from electroplating wastewater. It is a highly efficient technology for separating and recovering salts and water from electroplating wastewater. However, traditional evaporation methods consume a large amount of energy due to direct heating of the solution, have strict temperature requirements, and generally exhibit poor heat and mass transfer efficiency. Existing spray evaporation separation towers, typically made of stainless steel, suffer from the following drawbacks:

[0007] It is not convenient to observe the crystallization of metal salts and the evaporation of water in the tower during evaporation separation experiments. At the same time, the heat and mass transfer process is generally not very effective. During evaporation separation experiments, the temperature at the top of the tower is usually the highest and gradually decreases downwards. Therefore, using ordinary plexiglass material in the top part of the tower may result in softening and deformation.

[0008] Therefore, we made improvements and proposed a two-stage treatment device for low-concentration electroplating wastewater driven by a heat pump. Utility Model Content

[0009] The purpose of this invention is to address the current problems of inconvenience in observing the crystallization of metal salts and the evaporation of water in the tower during evaporation separation experiments, as well as the generally poor heat and mass transfer process. In evaporation separation experiments, the temperature is usually highest at the top of the tower and gradually decreases downwards. Therefore, using ordinary plexiglass material at the top of the tower may result in softening and deformation.

[0010] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0011] A two-stage treatment device for low-concentration electroplating wastewater driven by a heat pump source is used to improve the above-mentioned problems.

[0012] The present invention is as follows:

[0013] The system includes a tower body, the top of which is connected to a tower top via a flange. A hot air inlet pipe is installed at one end of the tower top, and a heat source pump is installed at the end of the hot air inlet pipe furthest from the tower top. An electroplating wastewater inlet pipe is installed on the tower top, with one end extending into the interior of the tower top and the other end connected to an external electroplating wastewater transport pipeline. A pressure nozzle is installed at the end of the electroplating wastewater inlet pipe located inside the tower top. An exhaust gas outlet pipe is installed at the bottom of the tower body, with one end located at the bottom of the tower body and the other end connected to an external exhaust gas transport pipeline.

[0014] As a preferred technical solution of this utility model, the tower body is made of polyacrylate, which has high transparency, low price and is easy to machine.

[0015] As a preferred technical solution of this utility model, the material of the tower top is high-temperature resistant stainless steel.

[0016] As a preferred technical solution of this utility model, a flange gasket is installed between the two flanges of the tower top and the tower body, and the tower top and the tower body are connected and fixed by bolts, nuts and gaskets.

[0017] As a preferred technical solution of this utility model, a high-temperature resistant fireproof sealant is installed at the flange connection between the tower body and the tower top to improve the sealing performance.

[0018] As a preferred technical solution of this utility model, a protective sleeve is installed around the tower body, and the protective sleeve is made of thermal insulation cotton.

[0019] As a preferred technical solution of this utility model, the protective sleeve is provided with multiple observation windows on its periphery for convenient observation of the interior of the tower.

[0020] As a preferred technical solution of this utility model, a collection hopper is installed inside the tower body, the top of the collection hopper is provided with an inclined surface, and the material of the collection hopper is polyacrylate.

[0021] As a preferred technical solution of this utility model, an inclined permeation plate is installed inside the tower body, which is used in conjunction with the collection hopper.

[0022] As a preferred technical solution of this utility model, a drainage pipe is installed on the tower body, and a drainage valve is provided at one end of the drainage pipe near the tower body.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] In the solution of this utility model:

[0025] 1. By configuring the tower top, hot air inlet pipeline, heat source pump, electroplating wastewater inlet pipeline, pressure nozzle, and exhaust gas outlet pipeline, the device can operate at medium and low temperatures (below 150℃), requiring no special equipment, with low sealing requirements, low material consumption, and low material requirements. It is simple, convenient, and has low operating costs. The device allows direct observation of the entire evaporation and separation process in the evaporation and separation tower, facilitating timely detection and optimization of adverse conditions in the heat and mass transfer process. The device uses air as the separation medium to treat electroplating wastewater, which is readily available and largely unrestricted by the environment. The device uses a transparent polyacrylate material tower body, which is inexpensive, easy to machine, and has a lower internal temperature than the top of the tower, thus effectively avoiding problems such as softening and deformation of the acrylic glass caused by high temperatures. Attached Figure Description

[0026] Figure 1 A schematic diagram of the structure of the two-stage treatment device for low-concentration electroplating wastewater driven by the heat pump provided by this utility model.

[0027] Figure 2 Right view of the two-stage treatment device for low-concentration electroplating wastewater driven by the heat pump provided by this utility model.

[0028] Figure 3 This utility model provides a two-stage treatment device for low-concentration electroplating wastewater driven by a heat pump. Figure 2 A schematic diagram of the three-dimensional cross-sectional structure at point AA;

[0029] Figure 4 This utility model provides a two-stage treatment device for low-concentration electroplating wastewater driven by a heat pump. Figure 3 Enlarged view of point A in the middle;

[0030] Figure 5 This utility model provides a two-stage treatment device for low-concentration electroplating wastewater driven by a heat pump. Figure 3 Enlarged view of point B in the middle.

[0031] The image shows:

[0032] 101. Tower body; 1. Tower top; 2. Hot air inlet pipe; 3. Heat source pump; 4. Electroplating wastewater inlet pipe; 5. Pressure nozzle; 6. Exhaust gas outlet pipe; 7. Flange gasket; 8. Protective sleeve; 9. Observation window; 10. Collection hopper; 11. Inclined surface; 12. Inclined permeable plate; 13. Drainage pipe; 14. Drain valve; 15. High temperature fireproof sealant. Detailed Implementation

[0033] 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. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0034] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0035] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0036] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0037] like Figure 1-5As shown, this embodiment proposes a two-stage treatment device for low-concentration electroplating wastewater driven by a heat pump, including a tower body 101. The tower body 101 is characterized by a tower top 1 connected to the top of the tower body 101 via a flange. A hot air inlet pipe 2 is installed at one end of the tower top 1. A heat pump 3 is installed at the end of the hot air inlet pipe 2 furthest from the tower top 1. An electroplating wastewater inlet pipe 4 is installed on the tower top 1, with one end extending into the interior of the tower top 1 and the other end connected to an external electroplating wastewater transport pipe. A pressure nozzle 5 is installed at the end of the electroplating wastewater inlet pipe 4 inside the tower top 1. An exhaust gas outlet pipe 6 is installed at the bottom of the tower body 101, with one end located at the bottom of the tower body 101 and the other end... Connected to an external exhaust gas transport pipeline, during use, electroplating wastewater reaches the pressure nozzle 5 through the electroplating wastewater inlet pipe 4 in the middle of the tower top 1. After being atomized into a spray, it is sprayed inside the tower top 1. Hot air enters the tower top 1 through the hot air inlet pipe 2 at the top of the tower top 1. It first passes through the reducing and expanding section of the tower top 1 to reduce its speed, so as to exchange heat more evenly with the electroplating wastewater spray. After completing the heat exchange through the tower body 101, it is first guided upward through the exhaust gas outlet pipe 6 at the bottom of the tower body 101. Through the physical structure, the exhaust gas and metal salt particles are initially separated, and then it leaves the tower. After the electroplating wastewater is atomized into a spray, it exchanges heat with the hot air coming from above, so that the water in the electroplating wastewater is gradually evaporated. After the evaporation and separation process, metal salt particles are formed and fall to the bottom of the tower.

[0038] like Figure 3 As shown, the tower body 101 is made of polyacrylate, which is highly transparent, inexpensive, and easy to machine. During use, the crystallization of metal salts and the evaporation of water can be directly observed through the polyacrylate tower body 101, and the initial parameters can be adjusted in a timely and convenient manner to improve the heat and mass transfer process inside the tower.

[0039] like Figure 3 As shown, the material of the tower top 1 is high-temperature resistant stainless steel. When in use, the stainless steel material of the tower top 1 can prevent softening and deformation due to high temperature.

[0040] like Figure 4 As shown, a flange gasket 7 is installed between the two flanges of the tower top 1 and the tower body 101, and bolts, nuts and gaskets are used to connect and fix the tower top 1 and the tower body 101, which improves the connection and fixation effect between the tower top 1 and the tower body 101 during use.

[0041] like Figure 4 As shown, a high-temperature resistant fireproof sealant 15 is installed at the flange connection between the tower body 101 and the tower top 1 to improve the sealing performance. When in use, it can improve the sealing performance between the tower top 1 and the tower body 101 after they are fixed.

[0042] like Figure 3As shown, a protective sleeve 8 is installed around the tower body 101. The protective sleeve 8 is made of thermal insulation cotton. When in use, the thermal insulation cotton protective sleeve 8 can provide thermal insulation for the tower body 101.

[0043] like Figure 3 As shown, the protective sleeve 8 has multiple observation windows 9 on its periphery for easy observation of the interior of the tower body 101. During use, by leaving several observation windows at the top, middle and bottom of the protective sleeve 8, it is convenient to observe the entire process in the evaporation separation experiment.

[0044] like Figure 5 As shown, a collection hopper 10 is installed inside the tower body 101. The top of the collection hopper 10 is provided with an inclined surface 11. The collection hopper 10 is made of polyacrylate. When in use, the collection hopper 10 can collect water droplets formed by water vapor adhering to the inner wall of the tower body 101, preventing them from fusing with the crystals at the bottom of the tower body 101 again.

[0045] like Figure 5 As shown, an inclined permeation plate 12 is installed inside the tower body 101. The inclined permeation plate 12 is used in conjunction with the collection hopper 10. When in use, the inclined permeation plate 12 can prevent crystals from entering the interior of the collection hopper 10. The crystals will roll down the inclined permeation plate 12 to the body of the tower body 101, and water droplets will permeate into the inclined permeation plate 12 and enter the interior of the collection hopper 10.

[0046] like Figure 5 As shown, a drainage pipe 13 is installed on the tower body 101. A drainage valve 14 is provided at one end of the drainage pipe 13 near the tower body 101. When in use, the water inside the collection hopper 10 can be discharged by activating the drainage valve 14.

[0047] Specifically, in use, the two-stage treatment device for low-concentration electroplating wastewater driven by the original heat pump works as follows: the electroplating wastewater reaches the pressure nozzle 5 through the electroplating wastewater inlet pipe 4 in the middle of the top of the tower 1, and is atomized into a spray and sprayed inside the top of the tower 1. Hot air enters the top of the tower 1 through the hot air inlet pipe 2 at the top of the tower 1. It first passes through the reducing and expanding section of the top of the tower 1 to reduce its speed so as to exchange heat more evenly with the electroplating wastewater spray. After completing the heat exchange through the tower body 101, it is first guided upward through the exhaust gas outlet pipe 6 at the bottom of the tower body 101. The exhaust gas and metal salt particles are initially separated through the physical structure, and then it leaves the tower. After the electroplating wastewater is atomized into a spray, it exchanges heat with the hot air flowing from above, so that the water in the electroplating wastewater is gradually evaporated. After the evaporation and separation process, metal salt particles are formed and fall to the bottom of the tower.

[0048] All technical features in this embodiment can be freely combined according to actual needs.

[0049] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A two-stage treatment device for low-concentration electroplating wastewater driven by a heat pump, comprising a tower body (101), characterized in that, The top of the tower body (101) is connected to the tower top (1) via a flange. A hot air inlet pipe (2) is installed on the top of the tower top (1). A heat source pump (3) is installed at the end of the hot air inlet pipe (2) away from the tower top (1). An electroplating wastewater inlet pipe (4) is installed on the tower top (1). One end of the electroplating wastewater inlet pipe (4) extends into the interior of the tower top (1) and is connected to the external electroplating wastewater transport pipe at the other end. A pressure nozzle (5) is installed at the end of the electroplating wastewater inlet pipe (4) located inside the tower top (1). An exhaust gas outlet pipe (6) is installed at the bottom of the tower body (101). One end of the exhaust gas outlet pipe (6) is located at the bottom of the tower body (101) and the other end is connected to the external exhaust gas transport pipe.

2. The two-stage treatment device for low-concentration electroplating wastewater driven by a heat pump according to claim 1, characterized in that, The tower body (101) is made of polyacrylate, which is highly transparent, inexpensive, and easy to machine.

3. The two-stage treatment device for low-concentration electroplating wastewater driven by a heat pump according to claim 1, characterized in that, The tower top (1) is made of high-temperature resistant stainless steel.

4. The two-stage treatment device for low-concentration electroplating wastewater driven by a heat pump according to claim 1, characterized in that, A flange gasket (7) is installed between the two flanges of the tower top (1) and the tower body (101), and the tower top (1) and the tower body (101) are connected and fixed by bolts, nuts and gaskets.

5. The two-stage treatment device for low-concentration electroplating wastewater driven by a heat pump according to claim 1, characterized in that, The flange connection between the tower body (101) and the tower top (1) is fitted with a high-temperature fireproof sealant (15) to improve sealing performance.

6. The two-stage treatment device for low-concentration electroplating wastewater driven by a heat pump according to claim 1, characterized in that, The tower body (101) is equipped with a protective sleeve (8) on its periphery, and the protective sleeve (8) is made of thermal insulation cotton.

7. The two-stage treatment device for low-concentration electroplating wastewater driven by a heat pump according to claim 6, characterized in that, The protective sleeve (8) has multiple observation windows (9) on its periphery for easy observation of the interior of the tower body (101).

8. The two-stage treatment device for low-concentration electroplating wastewater driven by a heat pump according to claim 1, characterized in that, The tower body (101) is equipped with a collection hopper (10), the top of which is provided with an inclined surface (11), and the material of the collection hopper (10) is polyacrylate.

9. The two-stage treatment device for low-concentration electroplating wastewater driven by a heat pump according to claim 8, characterized in that, An inclined permeation plate (12) is installed inside the tower body (101), which is used in conjunction with the collection hopper (10).

10. The two-stage treatment device for low-concentration electroplating wastewater driven by a heat pump according to claim 1, characterized in that, A drainage pipe (13) is installed on the tower body (101), and a drainage valve (14) is provided at one end of the drainage pipe (13) near the tower body (101).

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