High-concentration electroplating waste liquid treatment device

Abstract

The utility model provides a high-concentration electroplating waste liquid treatment device which is characterized in that the high-concentration electroplating waste liquid treatment device comprises a machine frame, a feeding stirring barrel, a roller dryer and a heating system, the roller dryer is installed on the machine frame through a bearing, and the feeding stirring barrel and the heating system are further arranged on the machine frame; the heating system comprises an expansion oil tank and a heat-conducting oil furnace; the feed stirring barrel is connected with the roller dryer through a feed lifting pipe and a return pipe; and the roller dryer is connected with the heating system through an oil inlet pipeline and an oil outlet pipeline. The heat conduction oil is ingeniously used for heating the central roller, accurate regulation and control of evaporation drying temperature are achieved, and it is ensured that waste liquid is evaporated under the optimal condition. According to the device, the treatment efficiency of the high-concentration electroplating waste liquid is improved, the treatment cost is further reduced, and powerful technical support is provided for sustainable development of the electroplating industry.

Description

Technical Field

[0001] The utility model relates to an electroplating waste liquid treatment device, more specifically, to a high-concentration electroplating waste liquid treatment device. Background Art

[0002] High-concentration electroplating wastewater results from the long-term accumulation of waste during the electroplating process, including electroplating, passivation, and stripping operations. The accumulation of impurities and the degradation of active ingredients severely impact the quality of the coating, ultimately leading to its final decomposition as waste tank liquid. Compared to electroplating rinse wastewater, this type of wastewater is rich in pollutants such as high concentrations of heavy metals, COD (chemical oxygen demand), and total nitrogen, and exhibits strong complexing properties. Its harmless treatment poses a major challenge in electroplating wastewater management.

[0003] Traditional electroplating wastewater treatment processes encompass two broad categories: physical and chemical. Chemical methods include oxidation, reduction, and electrochemical methods, while physical methods include concentration, crystallization, and adsorption. However, these methods often face the dual dilemma of low efficiency and high costs when treating high-concentration electroplating wastewater. Evaporation treatment stands out with its unique advantages. It not only significantly reduces wastewater volume, achieving a leap from high water content (70%-80%) to less than 20%, converting liquid hazardous waste into a solid form that is easier to manage and dispose of, but also eliminates the need for additional chemical agents, significantly reducing operating costs. Currently, a wide variety of evaporators are available on the market, such as MVR evaporators, scraped-plane evaporators, and multi-effect evaporators. While each has its own advantages, they still present challenges in treating high-concentration electroplating wastewater, including insufficient evaporation temperature, poor discharge quality, high initial investment, and frequent pipe blockages. In light of these challenges, the present utility model aims to overcome these technical bottlenecks by introducing and optimizing a drum drying evaporator to create a highly efficient high-concentration electroplating wastewater treatment device. This device cleverly utilizes thermal oil to heat the central drum, achieving precise control of the evaporation and drying temperature, ensuring that the waste liquid evaporates under optimal conditions. Ultimately, the moisture content can be reduced to below 10%, completely transforming the waste liquid into solid materials. This significantly promotes the reduction and resource utilization of electroplating waste liquid. This utility model not only improves the treatment efficiency of high-concentration electroplating waste liquid, but also further reduces treatment costs, providing strong technical support for the sustainable development of the electroplating industry. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a high-concentration electroplating waste liquid treatment device, which adopts the following technical solutions:

[0005] A high-concentration electroplating waste liquid treatment device is characterized in that it includes a frame, a feed stirring barrel, a drum dryer and a heating system. The drum dryer is installed on the frame through a bearing, and the feed stirring barrel and the heating system are also provided on the frame; the heating system includes an expansion oil tank and a thermal oil furnace; the feed stirring barrel and the drum dryer are connected by a feed riser pipe and a return pipe; the drum dryer and the heating system are connected by an oil inlet pipeline and an oil outlet pipeline.

[0006] Furthermore, the drum dryer includes a central heating drum, a support base and a water vapor outlet, and the water vapor outlet is arranged at the top of the drum dryer; the central heating drum is installed on the support base; and a ring gear and a transmission gear are also provided in the drum dryer for controlling the rotation of the central heating drum.

[0007] Furthermore, the central heating drum includes an inner drum and an outer drum, the inner drum is provided with an inner spray pipe and an inner cutter, and the outer drum is provided with an outer spray pipe and an outer cutter; the drum dryer also includes an inner hopper and an outer hopper.

[0008] Furthermore, the inner spray pipe is connected to the feed riser and the return pipe; the outer spray pipe is connected to the feed riser and the return pipe.

[0009] Furthermore, the central heating drum also includes an oil inlet ring cavity and an oil outlet ring cavity, which are symmetrically arranged on the surface of the central heating drum. The oil inlet ring cavity is arranged on the surface of the central heating drum close to the feed mixing barrel, and the oil outlet ring cavity is arranged on the surface of the central heating drum close to the heating system; the oil inlet pipeline is connected to the oil inlet ring cavity, and the oil outlet pipeline is connected to the oil outlet ring cavity.

[0010] Furthermore, a feed port, a stirrer and a liquid level gauge are provided on the top of the feed stirring barrel; and a lifting pump is provided on the feed stirring barrel and the feed lifting pipe.

[0011] Furthermore, the expansion oil tank is arranged above the thermal oil furnace.

[0012] Compared with the prior art, the advantages of the present invention are:

[0013] (1) This device can effectively reduce the amount of high-concentration electroplating waste liquid, converting liquid hazardous waste into solid materials, which is convenient for external transportation and centralized treatment;

[0014] (2) This device uses a thermal oil furnace to heat the thermal oil, which has a fast heating speed and high temperature, which can reach 180-200℃. The evaporation drying effect is better than the steam drying effect, the moisture content of the discharge material is low, and the discharge speed is fast;

[0015] (3) This device adopts double-sided spraying and double-sided discharging methods to increase the evaporation and drying area, improve the evaporation rate, and increase the output;

[0016] (4) This device uses clean energy and has little impact on the environment. It does not require the addition of chemical agents, thus saving operating costs and achieving the reduction of high-concentration electroplating waste liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the present utility model.

[0018] Among them, 1-frame, 2-feed mixing barrel, 3-drum dryer, 4-heating system, 5-expansion oil tank, 6-thermal oil furnace, 7-feed lifting pipe, 8-reflux pipe, 9-oil inlet pipeline, 10-oil outlet pipeline, 11-central heating drum, 12-support base, 13-water vapor outlet, 14-ring gear, 15-transmission gear, 16-inner drum, 17-outer drum, 18-inner spray pipe, 19-inner cutter, 20-inner hopper, 21-outer hopper, 22-outer spray pipe, 23-outer cutter, 24-oil inlet ring cavity, 25-oil outlet ring cavity, 26-feed port, 27-mixer, 28-liquid level gauge, 29-lifting pump. DETAILED DESCRIPTION

[0019] The present invention will be further described and illustrated below with reference to the accompanying drawings and specific implementations.

[0020] like Figure 1 As shown, the utility model provides a high-concentration electroplating waste liquid treatment device, which includes a frame 1, a feed stirring barrel 2, a drum dryer 3, a heating system 4, an expansion oil tank 5, a thermal oil furnace 6, a feed lifting pipe 7, a reflux pipe 8, an oil inlet pipeline 9, an oil outlet pipeline 10, a central heating drum 11, a support base 12, a water vapor outlet 13, a ring gear 14, a transmission gear 15, an inner drum 16, an outer drum 17, an inner spray pipe 18, an inner cutter 19, an inner hopper 20, an outer hopper 21, an outer spray pipe 22, an outer cutter 23, an oil inlet ring cavity 24, an oil outlet ring cavity 25, a feed port 26, a mixer 27, a liquid level meter 28, and a lifting pump 29.

[0021] The device includes a frame 1, a feed mixing barrel 2, a drum dryer 3 and a heating system 4. The drum dryer 3 is installed on the frame 1 through a bearing. The feed mixing barrel 2 and the heating system 4 are also provided on the frame 1; the heating system 4 includes an expansion oil tank 5 and a thermal oil furnace 6; the feed mixing barrel 2 and the drum dryer 3 are connected by a feed lifting pipe 7 and a return pipe 8; the drum dryer 3 and the heating system 4 are connected by an oil inlet pipeline 9 and an oil outlet pipeline 10.

[0022] The drum dryer 3 includes a central heating drum 11, a support base 12 and a water vapor outlet 13, wherein the water vapor outlet 13 is arranged at the top of the drum dryer 3; the central heating drum 11 is mounted on the support base 12; the drum dryer 3 is also provided with a ring gear 14 and a transmission gear 15 for controlling the rotation of the central heating drum 11.

[0023] The central heating drum 11 includes an inner drum 16 and an outer drum 17 . The inner drum 16 is provided with an inner spray pipe 18 and an inner cutter 19 , and the outer drum 17 is provided with an outer spray pipe 22 and an outer cutter 23 . The drum dryer 3 also includes an inner hopper 20 and an outer hopper 21 .

[0024] The inner spray pipe 18 is connected to the feed riser 7 and the return pipe 8 ; the outer spray pipe 22 is connected to the feed riser 7 and the return pipe 8 .

[0025] The central heating drum 11 also includes an oil inlet ring cavity 24 and an oil outlet ring cavity 25, which are symmetrically arranged on the surface of the central heating drum 11. The oil inlet ring cavity 24 is arranged on the surface of the central heating drum 11 close to the feed mixing barrel 2, and the oil outlet ring cavity 25 is arranged on the surface of the central heating drum 11 close to the heating system 4; the oil inlet pipeline 9 is connected to the oil inlet ring cavity 24, and the oil outlet pipeline 10 is connected to the oil outlet ring cavity 25.

[0026] A feed port 26 , a stirrer 27 and a liquid level meter 28 are provided on the top of the feed mixing barrel 2 ; a lifting pump 29 is provided on the feed mixing barrel 2 and the feed lifting pipe 7 .

[0027] The expansion oil tank 5 is arranged above the thermal oil furnace 6 .

[0028] The device operates as follows: High-concentration electroplating waste liquid enters the feed mixing drum 2 through the feed port 26, where it is uniformly mixed by the agitator 27. The liquid exiting the feed mixing drum 2 is lifted by the lift pump 29 to the inner spray pipe 18 and the outer spray pipe 22. The inner spray pipe 18 and the outer spray pipe 22 spray the liquid onto the surfaces of the inner drum 16 and the outer drum 17, respectively. The remaining liquid flows back into the feed mixing drum 2 via the return pipe 8. The thermal oil in the expansion tank 5 is heated by the thermal oil furnace 6 and then enters the central heating drum 11 through the oil inlet pipe 9 and the oil inlet annular cavity 24, heating and evaporating the liquid. The oil then returns to the thermal oil furnace 6 through the oil outlet annular cavity 25 and the oil outlet pipe 10 for recirculation and heating. During this process, the liquid material is formed into dry material after being acted on by the drum dryer 3. The dry material on the outer drum 17 is collected into the outer hopper 21 by the outer cutter 23, and the dry material on the inner drum 16 is collected into the inner hopper 20 by the inner cutter 19. Example

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0030] like Figure 1 As shown, this project adopts the above technical solution to trial-produce a high-concentration electroplating waste liquid treatment device, and the treatment object is high-concentration electroplating waste liquid.

[0031] The device includes a frame 1, a feed mixing barrel 2, a drum dryer 3 and a heating system 4. The drum dryer 3 is installed on the frame 1 through a bearing. The feed mixing barrel 2 and the heating system 4 are also provided on the frame 1; the heating system 4 includes an expansion oil tank 5 and a thermal oil furnace 6; the feed mixing barrel 2 and the drum dryer 3 are connected by a feed lifting pipe 7 and a return pipe 8; the drum dryer 3 and the heating system 4 are connected by an oil inlet pipeline 9 and an oil outlet pipeline 10.

[0032] The drum dryer 3 includes a central heating drum 11, a support base 12 and a water vapor outlet 13, wherein the water vapor outlet 13 is arranged at the top of the drum dryer 3; the central heating drum 11 is mounted on the support base 12; the drum dryer 3 is also provided with a ring gear 14 and a transmission gear 15 for controlling the rotation of the central heating drum 11.

[0033] The central heating drum 11 includes an inner drum 16 and an outer drum 17 . The inner drum 16 is provided with an inner spray pipe 18 and an inner cutter 19 , and the outer drum 17 is provided with an outer spray pipe 22 and an outer cutter 23 . The drum dryer 3 also includes an inner hopper 20 and an outer hopper 21 .

[0034] The inner spray pipe 18 is connected to the feed riser 7 and the return pipe 8 ; the outer spray pipe 22 is connected to the feed riser 7 and the return pipe 8 .

[0035] The central heating drum 11 also includes an oil inlet ring cavity 24 and an oil outlet ring cavity 25, which are symmetrically arranged on the surface of the central heating drum 11. The oil inlet ring cavity 24 is arranged on the surface of the central heating drum 11 close to the feed mixing barrel 2, and the oil outlet ring cavity 25 is arranged on the surface of the central heating drum 11 close to the heating system 4; the oil inlet pipeline 9 is connected to the oil inlet ring cavity 24, and the oil outlet pipeline 10 is connected to the oil outlet ring cavity 25.

[0036] A feed port 26 , a stirrer 27 and a liquid level meter 28 are provided on the top of the feed mixing barrel 2 ; a lifting pump 29 is provided on the feed mixing barrel 2 and the feed lifting pipe 7 .

[0037] The expansion oil tank 5 is arranged above the thermal oil furnace 6 .

[0038] This device is used to treat high-concentration electroplating wastewater at an electroplating wastewater treatment plant. The wastewater has a total volume of 80 m³ and contains high concentrations of pollutants such as heavy metals, COD, and total nitrogen, with a moisture content of 70-80%. The plant uses a 1.5 m³ / d high-concentration electroplating wastewater treatment unit. After drying and evaporation of the high-concentration electroplating wastewater, the moisture content of the solid material is less than 10%. The solid material is collected and transported for centralized disposal. The water vapor generated by the evaporation and drying of the wastewater is collected and separately disposed of to meet emission standards. During operation, the unit maintains an evaporation temperature of 180-200°C and operates for 20 hours per day, continuously treating high-concentration electroplating wastewater.

[0039] The above-described embodiments are merely intended to illustrate one embodiment of the present invention and are not intended to limit the present invention. It should be noted that a person skilled in the art may modify the technical solutions described in the above-described embodiments or replace some or all of the technical features therein with equivalents; and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of protection of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative work shall fall within the scope of protection of the present invention.

Claims

1. A high-concentration electroplating waste liquid treatment device, characterized in that: It includes a frame, a feed mixing barrel, a drum dryer and a heating system. The drum dryer is installed on the frame through a bearing. The feed mixing barrel and the heating system are also provided on the frame. The heating system includes an expansion oil tank and a thermal oil furnace. The feed mixing barrel and the drum dryer are connected by a feed lifting pipe and a return pipe. The drum dryer and the heating system are connected by an oil inlet pipeline and an oil outlet pipeline.

2. The high-concentration electroplating waste liquid treatment device according to claim 1, characterized in that: The drum dryer includes a central heating drum, a support base and a water vapor outlet, and the water vapor outlet is arranged at the top of the drum dryer; the central heating drum is installed on the support base; the drum dryer is also provided with a ring gear and a transmission gear for controlling the rotation of the central heating drum; the central heating drum includes an inner drum and an outer drum, the inner drum is provided with an inner spray pipe and an inner cutter, and the outer drum is provided with an outer spray pipe and an outer cutter; the drum dryer also includes an inner hopper and an outer hopper.

3. The high-concentration electroplating waste liquid treatment device according to claim 2, characterized in that: The inner spray pipe is connected to the feed riser and the return pipe; the outer spray pipe is connected to the feed riser and the return pipe.

4. The high-concentration electroplating waste liquid treatment device according to claim 2, characterized in that: The central heating drum also includes an oil inlet ring cavity and an oil outlet ring cavity, which are symmetrically arranged on the surface of the central heating drum. The oil inlet ring cavity is arranged on the surface of the central heating drum close to the feed mixing barrel, and the oil outlet ring cavity is arranged on the surface of the central heating drum close to the heating system; the oil inlet pipeline is connected to the oil inlet ring cavity, and the oil outlet pipeline is connected to the oil outlet ring cavity.

5. The high-concentration electroplating waste liquid treatment device according to claim 1, characterized in that: A feed port, a stirrer and a liquid level gauge are provided on the top of the feed stirring barrel; and a lifting pump is provided on the feed stirring barrel and the feed lifting pipe.

6. The high-concentration electroplating waste liquid treatment device according to claim 1, characterized in that: The expansion oil tank is arranged above the thermal oil furnace.

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