System for mixing copper chloride and ammonia water

Abstract

The utility model relates to a mixing system for copper chloride and ammonia water. The mixing system comprises two delivery pumps, a mixing pump and a control system, wherein the two delivery pumps are respectively used for delivering copper chloride solution and ammonia water solution; the two conveying pipelines are respectively connected with the conveying pump to the pipeline mixer; the inlet end of the pipeline mixer is connected to the output ends of the two conveying pipelines and is used for mixing the copper chloride solution and the ammonia water solution; the inlet ends of all the storage tanks are connected with the outlet end of the pipeline mixer and are used for storing the mixed liquid after the mixed reaction. Through the design of the conveying pipeline and the pipeline mixer, contact and volatilization of ammonia water before mixing are avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of hazardous waste treatment, and in particular to a technical field of a copper chloride and ammonia water mixing system. Background Technology

[0002] Etching wastewater is generated during the etching process of printed circuit boards (PCBs) through the chemical corrosion of copper. In the past, the treatment of PCB copper etching wastewater typically involved selling or sending this high-concentration copper etching wastewater to specialized processing plants for copper recycling. This traditional copper recycling process not only releases large amounts of copper ions (Cu2+), but also releases 90% of the volume of other chemical components (mainly Cl- ions, and other compounds), making it a major culprit for "secondary pollution" to the environment. Since the concentration of copper ions in etching wastewater can reach as high as 140-160 g / L, and the content of valuable copper metal is far higher than the grade of copper ore, arbitrary disposal would inevitably lead to a huge waste of resources. To make full use of resources, alkaline etching wastewater is now generally used to neutralize it, generating basic copper chloride precipitate. After further reaction, copper oxide, copper sulfate, and other products can be produced.

[0003] Alkalis used to neutralize acidic etching waste liquid include alkaline etching waste liquid, ammonia, or other inorganic alkalis (such as sodium carbonate, sodium bicarbonate, sodium hydroxide, potassium hydroxide, magnesium hydroxide, light calcium carbonate, light calcium bicarbonate, etc.). Currently, the domestic market generates a large volume of acidic etching waste liquid, while the production of alkaline etching waste liquid is relatively small. Based on current processes, ammonia is mostly used to fill this gap. Ammonia is mixed with acidic etching liquid to prepare an alkaline etching solution for further production. However, ammonia is highly volatile and easily evaporates during the preparation process. On the one hand, the ammonia gas produced causes environmental pollution; on the other hand, the evaporated ammonia gas reduces the concentration of ammonia in the solution, resulting in resource waste and economic losses. Utility Model Content

[0004] The technical problem to be solved by this utility model is to address the issue of ammonia water evaporation and environmental pollution caused during the preparation of copper ammonia solution in the prior art.

[0005] To solve the above-mentioned technical problems, this utility model provides a mixing system for copper chloride and ammonia, comprising:

[0006] Two transfer pumps are used to transfer copper chloride solution and ammonia solution, respectively;

[0007] Two delivery pipelines are respectively connected to the delivery pump and the pipeline mixer;

[0008] A pipeline mixer, the inlet of which is connected to the outlet of the two delivery pipelines, is used to mix a copper chloride solution and an ammonia solution;

[0009] Multiple storage tanks, the inlet of which is connected to the outlet of the pipeline mixer, are used to store the mixture after the mixing reaction.

[0010] Furthermore, the pipeline mixer is provided with an observation window for monitoring the mixing reaction process.

[0011] Furthermore, a flow meter is installed on the delivery pipeline to detect the flow rates of the copper chloride solution and the ammonia solution.

[0012] Furthermore, the pipeline mixer is a static mixer.

[0013] Furthermore, the pipe mixer includes a pipe body and two tapered flange joints; the two tapered flange joints are respectively connected to both ends of the pipe body; one of the tapered flange joints has an inlet flange on one side, and the other tapered flange joint is connected to all the storage tanks.

[0014] Furthermore, the inner wall of the pipeline mixer is provided with a polytetrafluoroethylene liner and a steel liner from the outside to the inside.

[0015] Furthermore, the steel liner is provided with a spiral structure for mixing copper chloride and ammonia.

[0016] Furthermore, all of the storage tanks are connected to a flushing system, the end of which is connected to a tap water network.

[0017] Furthermore, the flushing system includes multiple flushing pipes and corresponding control valves; the tap water network is connected to the corresponding storage tank through each flushing pipe.

[0018] Furthermore, all of the storage tanks are also connected to drainage pipes that lead to solution processing equipment.

[0019] Compared with the prior art, the technical solution provided by the embodiments of this utility model can achieve at least the following beneficial effects:

[0020] First, this utility model avoids the contact and volatilization of ammonia water before mixing by designing the conveying pipeline and pipeline mixer.

[0021] Secondly, by using polytetrafluoroethylene lining and steel lining, this utility model enhances the corrosion resistance and wear resistance of the equipment, and improves the service life of the mixer.

[0022] Third, by controlling the flow rate and setting the observation window, this utility model can monitor the reaction process in real time, thereby improving the efficiency and accuracy of the mixing reaction. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only involve some embodiments of this utility model, and are not intended to limit this utility model.

[0024] Figure 1 This is a schematic diagram of a mixing system for copper chloride and ammonia according to the present invention;

[0025] Figure 2 This is a schematic diagram of the pipe mixer of this utility model;

[0026] Figure 3 This is a schematic diagram of the storage tank, flushing system, and drainage pipeline of this utility model;

[0027] Figure 4 This is a schematic diagram of the pipeline mixer and check valve structure of this utility model;

[0028] Figure 5 This is a schematic diagram of the check valve structure and buffer groove of this utility model.

[0029] In the picture:

[0030] Transfer pump 1

[0031] Delivery pipeline 2

[0032] Pipe mixer 3

[0033] Observation window 31

[0034] Tube body 32

[0035] Tapered flange joint 33

[0036] Tapered flange joint 34

[0037] Imported flange 35

[0038] Spiral structure 36

[0039] PTFE liner 37

[0040] Steel liner 38

[0041] Check structure 39

[0042] Buffer slot 391

[0043] Stepped structure 391a

[0044] Storage tank 4

[0045] Flushing pipe 5

[0046] Drainage pipe 6

[0047] Cleaning water inlet 7 Detailed Implementation

[0048] 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. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0049] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a limitation of quantity, but rather indicate the presence of at least one.

[0050] refer to Figure 1 and Figure 2 This embodiment provides a mixing system for copper chloride and ammonia, comprising:

[0051] Two transfer pumps 1 are used to transfer copper chloride solution and ammonia solution, respectively;

[0052] Two delivery pipelines 2 are respectively connected to the delivery pump 1 and the pipeline mixer 3;

[0053] A pipe mixer 3, the inlet end of which is connected to the output end of two delivery pipes 2, is used to mix copper chloride solution and ammonia solution;

[0054] Multiple storage tanks 4, the inlet end of all storage tanks 4 is connected to the outlet end of the pipeline mixer 3, for storing the mixture after the mixing reaction.

[0055] This invention utilizes two independently operating transfer pumps 1 to precisely control the flow rates of copper chloride solution and ammonia solution, ensuring accurate reactant ratios. Two separate delivery pipelines transport the solutions from the transfer pumps 1 to the pipeline mixer, preventing premature contact between the two solutions and avoiding unnecessary reactions. Furthermore, multiple storage tanks 4 can be used in parallel to collect the mixture after the reaction. This allows for different reaction stages to be carried out in different tanks or for batch processing.

[0056] In a preferred embodiment, the pipe mixer 3 is provided with an observation window 31 for monitoring the mixing reaction process. The observation window 31 allows the operator to directly observe the mixing reaction process, thereby enabling real-time monitoring of the reaction progress and the uniformity of mixing.

[0057] In a preferred embodiment, each delivery line 2 is equipped with a flow meter for detecting the flow rate of the copper chloride solution and the ammonia solution.

[0058] In a preferred embodiment, such as Figure 2 As shown, the pipeline mixer 3 is a static mixer, comprising a pipe body 32 and two conical flange joints 33 and 34. The two ends of the pipe body 32 are respectively connected to the two conical flange joints 33 and 34. One side of one of the conical flange joints 33 has an inlet flange 35, which connects to a conveying pipeline 2 carrying copper chloride solution. The conical flange joint 33 is also connected to a conveying pipeline 2 carrying ammonia solution. The other conical flange joint 34 connects to each of the storage tanks 4.

[0059] In a preferred embodiment, such as Figure 2 As shown, the inner wall of the pipe mixer 3 is provided with a polytetrafluoroethylene (PTFE) liner 37 and a steel liner 38 from the outside to the inside. PTFE, the material of the PTFE liner 37, is a very stable polymer with excellent chemical stability, heat resistance, and non-stickiness, and can withstand the corrosion of various strong acids, strong alkalis, and solvents. The steel liner 38 provides additional strength and wear resistance, enabling the pipe mixer 3 to withstand higher operating pressures and more demanding working environments.

[0060] In a preferred embodiment, such as Figure 2 As shown, the steel liner also features a spiral structure 36 for mixing, aiding in the mixing of ammonia and copper chloride solutions. The spiral structure 36 is typically designed to increase the turbulence of the fluid within the pipe, thereby improving mixing efficiency. In the pipe mixer 3, the spiral structure can be helical blades fixed inside the pipe, which can create a continuous flow pattern in the pipe, increasing fluid mixing and exchange.

[0061] In a preferred embodiment, such as Figure 4 and 5 As shown, the inner wall of the pipe mixer 3 is also equipped with a check valve 39, and the inner wall of the check valve 39 is provided with a buffer groove 391. Furthermore, the main function of this check valve 39 is to ensure that the fluid flows in only one direction, preventing backflow of the mixed liquid and thus avoiding possible material contamination or chemical reactions. The design of the buffer groove 391 helps to reduce water hammer, which is a pressure wave generated when the fluid flow suddenly stops or changes direction. This pressure wave can damage the piping system.

[0062] In a preferred embodiment, the buffer tank 391 includes a multi-step structure 391a; the multi-step structure forms multiple levels of steps in the buffer tank, each step can slow down the fluid velocity, thereby reducing the impact of the fluid on the inner wall of the pipe mixer, reducing noise and vibration, and improving mixing efficiency.

[0063] In a preferred embodiment, such as Figure 2 As shown, the tapered flange joint 33 is also connected to a cleaning water inlet, which allows the pipeline mixer 3 to be cleaned after the solution mixing is completed, so that the cleaning water enters the storage tank 4 after cleaning the pipeline mixer 3; then the storage tank 4 is rinsed.

[0064] In a preferred embodiment, such as Figure 3 As shown, all storage tanks 4 are connected to a flushing system, the end of which is connected to a municipal water supply network. The municipal water supply network flushes the storage tanks 4 through various water passages of the flushing system. Simultaneously, corresponding drainage pipes 5 can be installed, allowing the flushed liquid in the storage tanks 4 to be pumped to a solution treatment device. This ensures the cleaned solution is processed and filtered by the solution treatment device, preventing direct flow into the sewage network and subsequent contamination.

[0065] In a preferred embodiment, such as Figure 3 As shown, the flushing system includes multiple flushing pipes 6 and corresponding control valves; the tap water network is connected to the corresponding storage tank 4 through each flushing pipe 6. This means that each storage tank 4 can be flushed independently, ensuring the cleanliness of each storage tank 4, and that specific tanks can be flushed as needed without affecting other tanks.

[0066] Corresponding control valves: These valves control the water flow to each storage tank 4, allowing the operator to open or close the water flow as needed. This allows for precise control of the flushing process and conserves water resources.

[0067] Municipal water supply connection: Using the municipal water supply as the flushing water source ensures sufficient water pressure and volume for effective cleaning of the storage tank. This also means that no additional water pumps or water sources are required during the flushing process.

[0068] Individually connected to the corresponding storage tank: Each flushing line 6 is directly connected to a storage tank, which ensures that the flushing water can directly reach the tank that needs to be cleaned, improving flushing efficiency.

[0069] In addition to the embodiments of the present invention described above, the present invention also includes the following control method, comprising the following steps:

[0070] The delivery pump 1 on each delivery pipeline 2 is started, and copper chloride solution and ammonia solution are delivered to the pipeline mixer 3 through the two delivery pipelines 2 respectively; the flow rates of copper chloride solution and ammonia solution are detected by flow meters, and the mixing reaction process is monitored through observation window 31; the speed of delivery pump 1 is adjusted to achieve the optimal mixing ratio of copper chloride solution and ammonia solution; after the mixing reaction is completed, the mixture is stored in storage tank 4. In case of pipeline blockage or other abnormalities, the flushing system can handle the situation online without disassembling the equipment.

[0071] The above description is merely an exemplary embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model. The scope of protection of the present utility model is determined by the appended claims.

Claims

1. A system for mixing copper chloride and aqueous ammonia, characterized by, The utility model relates to a kind of copper chloride and ammonia solution mixing device, including: Two delivery pumps, respectively for transporting copper chloride solution and ammonia solution; Two delivery pipelines, respectively connecting the delivery pump to pipeline mixer; A pipeline mixer, the inlet end of the pipeline mixer is connected to the output end of two delivery pipelines, for mixing copper chloride solution and ammonia solution; Multiple storage tanks, the inlet end of all storage tanks is connected to the outlet end of the pipeline mixer, for storing mixed solution after mixing reaction.

2. A system for mixing copper chloride and ammonia water according to claim 1, characterized in that, A viewing window is provided on the pipeline mixer for monitoring the mixing reaction process.

3. The system for mixing copper chloride and ammonia water according to claim 1, wherein A flow meter is provided on the delivery pipeline for detecting the flow of copper chloride solution and ammonia solution.

4. The system for mixing copper chloride and ammonia water according to claim 1, wherein The pipeline mixer is a static mixer.

5. A system for mixing copper chloride and ammonia water according to claim 4, wherein The pipeline mixer includes a pipe body and two tapered flange joints;The two ends of the pipe body are respectively connected to two tapered flange joints;One side of one of the tapered flange joints is provided with an inlet flange, and the other tapered flange joint is connected to all storage tanks.

6. A system for mixing copper chloride and ammonia water according to claim 4, wherein The inner wall of the pipeline mixer is provided with a polytetrafluoroethylene lining and a steel lining from outside to inside.

7. A system for mixing copper chloride and ammonia water according to claim 6, wherein The steel lining is provided with a spiral structure for mixing copper chloride and ammonia.

8. A system for mixing copper chloride and ammonia water according to claim 1, wherein All storage tanks are connected to a flushing system, and the flushing system is connected to a water supply network at the end.

9. The system for mixing copper chloride and ammonia water according to claim 8, wherein The flushing system includes multiple flushing pipelines and corresponding control valves;The water supply network is connected to the corresponding storage tank through each flushing pipeline.

10. The system for mixing copper chloride and ammonia water according to claim 1, wherein All storage tanks are also connected to a drainage pipeline, and the drainage pipeline leads to a solution treatment device.

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