Gold-containing alloy wastewater treatment system

Abstract

The utility model discloses a gold-containing alloy wastewater treatment system which comprises a wastewater collection tank communicated with a waste liquid discharge system of a workshop through a pipeline, a pretreatment unit used for pretreating wastewater, a gold recovery unit and a tail water tank, the pretreatment unit comprises a pretreatment tank and a filter, the pretreatment tank is communicated with the wastewater collection tank, and the filter is communicated with the wastewater collection tank. The pretreatment tank is connected with a filter through a pipeline, the output end of the filter is connected with a gold recovery unit, and the output end of the gold recovery unit is communicated with the tail water tank; a driving motor is mounted at the bottom of the pretreatment tank, and the output end of the driving motor extends into a bottom plate of the pretreatment tank and is fixedly connected with a stirring and liquid distributing frame. According to the utility model, the precipitating agent is uniformly distributed into the pretreatment tank along the guiding of the pipeline while the precipitating agent and metal ions in the waste liquid are fully contacted and reacted through the stirring of the stirring liquid distribution frame, so that the metal ions in the waste water and the precipitating agent can be efficiently and quickly mixed, the reaction efficiency is effectively improved, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of wastewater treatment systems, in particular to a gold alloy wastewater treatment system. Background Art

[0002] In the production process of PCB and electroplating enterprises, the gold-containing cleaning water and concentrated waste liquid from the cleaning section of the electroplating gold or nickel-gold production line contain a large amount of gold and other metal elements. When these wastewaters are discharged, they are usually mixed with wastewater containing metal elements such as nickel and tin, and then discharged into the sewage treatment pool. The traditional wastewater treatment method is to add a general precipitation reagent to the treatment pool to perform a preliminary chemical reaction, so that some metal elements are precipitated and then discharged after meeting the sewage discharge standards.

[0003] However, this simple sewage treatment method has many problems. First, the recycling rate of metal elements is very low, and a large amount of gold and other valuable metal elements are wasted in the sewage treatment process, resulting in resource waste and environmental pollution. Second, the mixed discharge of multiple metal mixtures before sewage treatment lacks targeted treatment measures, making the sewage treatment process complicated and inefficient, while increasing treatment costs. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a gold alloy wastewater treatment system which improves treatment efficiency and reduces treatment cost.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a gold alloy wastewater treatment system, comprising a wastewater collection tank connected to the waste liquid discharge system of the workshop through a pipeline, a pretreatment unit for pre-treating the wastewater, a gold recovery unit and a tailwater tank, the pretreatment unit comprising a pretreatment tank and a filter, the pretreatment tank is connected to the wastewater collection tank through a first pipeline, a liquid inlet pump is provided on the first pipeline, a second pipeline is provided on the pretreatment tank, a filter is connected to the second pipeline, the output end of the filter is connected to the gold recovery unit through a third pipeline, and the output end of the gold recovery unit is connected to the tailwater tank;

[0006] A driving motor is installed at the bottom of the pretreatment tank, and the output end of the driving motor extends into the bottom plate of the pretreatment tank and is fixedly connected to a stirring liquid distribution frame, the stirring liquid distribution frame includes a central tube connected to the output end of the driving motor, a stirring tube arranged on the central tube and a stirring paddle arranged on the stirring tube, one end of the central tube is externally connected to a feeding pipeline for introducing a precipitant through a rotating joint, a plurality of stirring tubes are arranged at intervals along the length direction of the central tube, the stirring tube and the central tube constitute a liquid distribution pipeline, one end of the stirring tube is connected to the central tube, and the other end extends outward and the stirring paddle is fixedly connected to the side wall.

[0007] Preferably, the stirring paddle is a propeller blade spirally arranged around the central tube.

[0008] Preferably, the stirring paddle is an elastic blade.

[0009] Preferably, the outer wall of the stirring tube is provided with a liquid distribution hole

[0010] Preferably, the liquid distribution holes are strip-shaped holes, the diameter of which gradually expands from the central tube outwards.

[0011] Preferably, both ends of the liquid distribution hole are in arc transition.

[0012] Preferably, a drainage hole is provided at the bottom of the central tube.

[0013] Preferably, the gold recovery unit comprises a plurality of resin exchange adsorption towers connected by pipelines, and the resin exchange adsorption towers are provided with activated carbon layers and gold adsorption resins in sequence along the flow direction of the wastewater.

[0014] The technical effect of the utility model is as follows: by setting up a stirring liquid distribution rack, the precipitant and the metal ions in the waste liquid are fully contacted and reacted through stirring, and the precipitant is evenly distributed into the pretreatment tank along the guidance of the pipeline, thereby further ensuring that the metal ions in the wastewater and the precipitant can be efficiently and quickly mixed, effectively improving the reaction efficiency and improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Figure 2 This is a partial structural schematic diagram of the pretreatment tank.

[0017] Figure 3 It is a structural schematic diagram of the stirring liquid distribution rack.

[0018] The main technical features in the figure are marked as follows: 1. Wastewater collection tank; 11. Liquid inlet pump; 12. First pipeline; 2. Pretreatment tank; 21. Second pipeline; 22. High-pressure pump; 3. Filter; 4. Resin exchange adsorption tower; 41. Third pipeline; 5. Tail water tank; 6. Stirring liquid distribution rack; 61. Center tube; 62. Stirring tube; 63. Stirring paddle; 64. Liquid distribution hole; 65. Drain hole. DETAILED DESCRIPTION

[0019] The present invention will be further described below through specific implementation modes and accompanying drawings.

[0020] like Figures 1 to 3As shown, a gold alloy wastewater treatment system includes a wastewater collection tank 1, a pretreatment unit, a gold recovery unit and a tailwater tank 5. The feed end of the wastewater collection tank 1 is connected to the waste liquid discharge system of the workshop through a pipeline.

[0021] Specifically, the pretreatment unit includes a pretreatment tank 2 and a filter 3. The pretreatment tank 2 is connected to the wastewater collection tank 1 through a first pipe 12. The first pipe 12 is provided with a liquid inlet pump 11, and the liquid inlet pump 11 is a prior art. A second pipe 21 is provided at the bottom of the pretreatment tank 2. The second pipe 21 is provided with a high-pressure pump 22, one end of which is connected to the filter 3. The filter 3 and the high-pressure pump 22 are prior art. The output end of the filter 3 is connected to the gold recovery unit through a third pipe 41, and the output end of the gold recovery unit is connected to the tailwater tank 5.

[0022] Specifically, a driving motor is installed at the bottom of the pretreatment tank 2, and the output end of the driving motor extends into the bottom plate of the pretreatment tank 2 and is fixedly connected to a stirring liquid distribution frame 6, the stirring liquid distribution frame 6 includes a central tube 61, a stirring tube 62 and a stirring paddle 63, the bottom end of the central tube 61 is connected to the output end of the driving motor, and the top end is externally connected to a feeding pipe through a rotating joint, and a liquid carrying a precipitant is simultaneously introduced into the feeding pipe to uniformly add the precipitant through the feeding pipe, and the liquid can be water or residual liquid circulated back after the wastewater is treated; the precipitant can be selected according to the type and concentration of metal ions in the wastewater, and an appropriate precipitant, such as sodium hydroxide, calcium hydroxide, polyaluminum chloride, etc., can be selected to convert the metal ions into metal salts that are easy to precipitate. The stirring tube 62 is connected to the side wall of the central tube 61, and a plurality of stirring tubes 62 are arranged at intervals along the length direction of the central tube 61. The stirring tube 62 and the central tube 61 constitute a liquid distribution pipeline, one end of which is connected to the central tube 61, and the other end extends outward and the stirring paddle 63 is fixedly connected to the side wall to serve as a support rod for the stirring paddle 63; the stirring paddle 63 is a propeller blade spirally arranged around the central tube 61, which can be made of commonly used corrosion-resistant rubber material.

[0023] Furthermore, a liquid distribution hole 64 is opened on the outer wall of the stirring tube 62. The liquid distribution hole 64 is provided in multiples along the circumferential direction of the stirring tube 62. The liquid distribution hole 64 is a strip-shaped hole, the width of which gradually increases outward from the central tube 61 and has arc transitions at both ends; so as to ensure uniform liquid distribution while avoiding blockage of the liquid distribution hole 64.

[0024] Furthermore, a drainage hole 65 is provided at the bottom of the central tube 61 to prevent the precipitant from being deposited at the bottom of the central tube 61 due to the inability to be discharged in time.

[0025] Furthermore, the gold recovery unit includes a plurality of resin exchange adsorption towers 4 connected in series through pipelines, wherein the resin exchange adsorption tower 4 is provided with an activated carbon layer and a gold adsorption resin in sequence from the wastewater flow direction, and an activated carbon layer, a filter screen and a gold adsorption resin are provided in sequence from top to bottom.

[0026] The specific implementation process of the utility model is as follows: the wastewater in the wastewater collection tank 1 is pumped into the pretreatment tank 2 through the liquid inlet pump 11, the precipitant is uniformly introduced into the pretreatment tank 2 along with the liquid in the stirring liquid distribution rack 6, the wastewater and the precipitant are fully mixed and reacted, and the metal ions in the wastewater are combined with the precipitant to form a precipitate, the wastewater in the pretreatment tank 2 is pumped into the second pipe 21, the wastewater passes through the filter 3, and the larger particles of the precipitate are filtered and collected; thereafter, the wastewater enters the resin exchange tower, and the separated wastewater is further treated to meet the discharge standard or reuse requirements.

[0027] The above description is only a specific embodiment of the present invention, but the structural features of the present invention are not limited thereto. The present invention can be used on similar products. Any changes or modifications made by any technician in the field of the present invention are covered by the patent scope of the present invention.

Claims

1. A gold alloy wastewater treatment system, Features: The invention comprises a wastewater collection tank (1) connected to a waste liquid discharge system of a workshop through a pipeline, a pretreatment unit for pretreating wastewater, a gold recovery unit and a tailwater tank (5), wherein the pretreatment unit comprises a pretreatment tank (2) and a filter (3), wherein the pretreatment tank (2) is connected to the wastewater collection tank (1) through a first pipeline (12), a liquid inlet pump (11) is provided on the first pipeline (12), a second pipeline (21) is provided on the pretreatment tank (2), a filter (3) is connected to the second pipeline (21), an output end of the filter (3) is connected to the gold recovery unit through a third pipeline (41), and an output end of the gold recovery unit is connected to the tailwater tank (5); A driving motor is installed at the bottom of the pretreatment tank (2), the output end of the driving motor extends into the bottom plate of the pretreatment tank (2) and is fixedly connected to a stirring liquid distribution frame (6), the stirring liquid distribution frame (6) comprises a central tube (61) connected to the output end of the driving motor, a stirring tube (62) arranged on the central tube (61) and a stirring paddle (63) arranged on the stirring tube (62), one end of the central tube (61) is externally connected to a feeding pipeline for introducing a precipitant through a rotating joint, a plurality of stirring tubes (62) are arranged at intervals along the length direction of the central tube (61), the stirring tube (62) and the central tube (61) constitute a liquid distribution pipeline, one end of which is connected to the central tube (61), and the other end extends outwards and is fixedly connected to the side wall of the stirring paddle (63).

2. A gold alloy wastewater treatment system according to claim 1, Features: The stirring paddle (63) is a propeller blade spirally arranged around the central tube (61).

3. A gold alloy wastewater treatment system according to claim 1, Features: The stirring paddle (63) is an elastic paddle.

4. A gold alloy wastewater treatment system according to claim 1, Features: The outer wall of the stirring tube (62) is provided with a liquid distribution hole (64).

5. A gold alloy wastewater treatment system according to claim 4, Features: The liquid distribution hole (64) is a strip-shaped hole, the diameter of which gradually increases from the central tube (61) outwards.

6. A gold alloy wastewater treatment system according to claim 5, Features: The two ends of the liquid distribution hole (64) are in arc transition.

7. A gold alloy wastewater treatment system according to claim 1, Features: The bottom of the central tube (61) is provided with a drainage hole (65).

8. A gold alloy wastewater treatment system according to claim 1, Features: The gold recovery unit comprises a plurality of resin exchange adsorption towers (4) connected by pipelines, wherein the resin exchange adsorption towers (4) are provided with activated carbon layers and gold adsorption resins in sequence along the flow direction of the wastewater.

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