PH (potential of hydrogen) control device for deironing in hydrometallurgy

Abstract

The utility model discloses a pH control device for deironing in hydrometallurgy, which relates to the technical field of hydrometallurgy and comprises a first pH meter, a controller, a flow meter, a regulating valve, a second pH meter, a mixing box, a drainage groove, a first liquid conveying pipe, a second liquid conveying pipe, a first reaction tank, a second reaction tank, a third reaction tank and a liquid adding pipeline. According to the utility model, the controller is matched with the regulating valve and the flowmeter to regulate the opening degree of the nickel carbonate slurrying liquid valve in real time, and the flow of the nickel carbonate slurrying liquid is regulated according to the change value of a pH value measuring point and the transformation ratio set value of the flow of the nickel carbonate slurrying liquid and the anolyte by means of an automatic control technical means; the labor intensity of operators is reduced, the field safety is improved, and the production efficiency and the technological process control level are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of hydrometallurgy, more particularly to a pH control device for iron removal in hydrometallurgy. BACKGROUND

[0002] A pH meter is arranged in the iron removal system in the hydrometallurgy process, and an operator manually adjusts a valve of a nickel carbonate slurry by means of data displayed by a central control room or a field instrument. However, the iron removal solution has a high temperature, and the solution contains iron slag in the form of iron hydroxide colloid, which is easy to adhere to the surface of the pH electrode, so that the pH meter cannot accurately measure. The current operation mode is to take a sample in a chute at the outlet of a first reaction tank, manually measure the pH by using pH test paper, and manually adjust the valve of the nickel carbonate slurry according to the test result of the test paper. The main problems are as follows: the pH value of the iron removal is detected by manual test paper, the detection is lagged, and the error is large; the addition of the nickel carbonate slurry is adjusted by manual experience, the operation strength is large, and the pH value of the iron removal process is easy to fluctuate. SUMMARY

[0003] The utility model discloses a pH control device for iron removal in hydrometallurgy, which can realize automatic control of the iron removal process, reduce the number of employee inspections, improve production efficiency and process control level, and improve on-site safety.

[0004] The utility model discloses a pH control device for iron removal in hydrometallurgy, which can realize automatic control of the iron removal process, reduce the number of employee inspections, improve production efficiency and process control level, and improve on-site safety.

[0005] A pH control device for iron removal in hydrometallurgy, comprising a pH meter one, a controller, a flow meter, a regulating valve, a pH meter two, a mixing box, a drainage groove, a liquid delivery pipe one, a liquid delivery pipe two, a reaction tank one, a reaction tank two, a reaction tank three, and a liquid feeding pipeline.

[0006] The outlet of the liquid feeding pipeline is connected with the inlet of the mixing box, the outlet of the mixing box is connected with the reaction tank one through a pipeline, and the reaction tank one, the reaction tank two and the reaction tank three are sequentially connected through pipelines.

[0007] The pH meter one is installed at the outlet of the reaction tank one, the pH meter two is installed on the drainage groove, the flow meter and the regulating valve are installed on the liquid feeding pipeline, and the regulating valve is located between the flow meter and the mixing box; the signal output ends of the pH meter one, the pH meter two and the flow meter are signal connected with the signal receiving end of the controller, and the signal output end of the controller is signal connected with the signal receiving end of the regulating valve.

[0008] Further, the liquid delivery pipeline one and the liquid delivery pipeline two are in communication with the inlet of the drainage groove.

[0009] Further, the pH meter one is a post-reaction measuring point, and the pH meter two is a pre-reaction measuring point.

[0010] Further, the mixing box is a steel lining PTFE material.

[0011] Further, the regulating valve is a pneumatic or electric regulating valve, and the valve core is a ball valve, a butterfly valve or the like.

[0012] Further, the flow meter is an electromagnetic flow meter, a mass flow meter or the like.

[0013] Further, the controller is an embedded controller, a micro-PLC, a PC or the like.

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

[0015] 1. The controller cooperates with the flow meter and the regulating valve to accurately control the nickel carbonate slurry flow and the external liquid flow, provides stable reaction conditions for the subsequent process, adjusts the nickel carbonate slurry valve opening in real time through the control algorithm of the multivariable advanced controller, realizes the potential control target required by the process, achieves the target of stabilizing the production process, improving the production efficiency and reducing the raw material consumption;

[0016] 2. The automatic control means realizes continuous measurement and automatic control of the iron removal process, reduces the labor intensity of the operators and improves the safety of the site. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the system structure schematic view of the utility model.

[0018] Signs: 1, pH meter one; 2, controller; 3, flow meter; 4, regulating valve; 5, pH meter two; 6, mixing box; 7, drainage groove; 8, liquid delivery pipe one; 9, liquid delivery pipe two; 10, reaction tank one; 11, reaction tank two; 12, reaction tank three; 13, liquid feeding pipeline. DETAILED DESCRIPTION

[0019] The utility model will be combined with the drawings and specific embodiments to be described in detail, in this utility model's schematic embodiment and explanation explain the utility model, but not as the limitation of the utility model.

[0020] Please refer to Figure 1 , the utility model provides the following technical scheme:

[0021] A pH control device for iron removal in hydrometallurgy, comprising a pH meter one 1, a controller 2, a flow meter 3, a regulating valve 4, a pH meter two 5, a mixing box 6, a drainage groove 7, a liquid delivery pipe one 8, a liquid delivery pipe two 9, a reaction tank one 10, a reaction tank two 11, a reaction tank three 12 and a liquid feeding pipeline 13.

[0022] The outlet of the flow groove 7 and the liquid feeding pipeline 13 are connected with the inlet of the mixing box 6, the outlet of the mixing box 6 is connected with the reaction tank 10 through a pipeline, the reaction tank 10, the reaction tank 11 and the reaction tank 12 are connected through pipelines in sequence;

[0023] The pH meter 1 is installed at the outlet of the reaction tank 10, the pH meter 2 is installed on the flow groove 7, the flow meter 3 and the adjusting valve 4 are installed on the liquid feeding pipeline 13, and the adjusting valve 4 is located between the flow meter 3 and the mixing box 6; the signal output ends of the pH meter 1, the pH meter 2 and the flow meter 3 are connected with the signal receiving ends of the controller 2, and the signal output end of the controller 2 is connected with the signal receiving end of the adjusting valve 4.

[0024] In the embodiment, the pH meter 1 and the pH meter 2 detect the pH values of the liquid before and after the reaction respectively, the flow meter 3 and the adjusting valve 4 are used for adjusting the flow of the liquid in the liquid feeding pipeline 13, the controller 2 receives the numerical signal of the pH meter 1 and the pH meter 2, and then transmits the control signal to the adjusting valve 4.

[0025] The working principle and the use process of the utility model are as follows:

[0026] 1. Measuring the pH value: the pH meter 1 is installed at the outlet of the reaction tank 10, and the pH value of the liquid at the outlet of the reaction tank 10 is detected and then transmitted to the controller 2; the pH meter 2 is installed on the flow groove, and the pH value of the foreign liquid in the liquid feeding pipeline 1 and the liquid feeding pipeline 2 is detected and then transmitted to the controller;

[0027] 2. Measuring the flow: the flow of the nickel carbonate slurry solution is measured through the flow meter 3;

[0028] 3. Controlling the flow: after the controller receives the pH values of the pH meter 1 and the pH meter 2 and the flow of the nickel carbonate slurry solution, the flow of the nickel carbonate slurry solution, the flow of the foreign liquid and the pH value of the outlet of the iron removal groove constitute a ratio adjusting loop through the adjusting valve 4; the control loop adjusts the flow of the nickel carbonate slurry solution according to the change value of the pH value measuring point and the variable ratio set value of the flow of the nickel carbonate slurry solution and the foreign liquid.

[0029] The technical scheme provided by the embodiment of the utility model is introduced in detail, the principle and the implementation mode of the embodiment of the utility model are described by applying specific examples, the description of the above embodiment is only applicable to helping understanding the principle of the embodiment of the utility model, meanwhile, for the general technical personnel in the field, the embodiment of the utility model will have changes in the specific implementation mode and the application range, and in conclusion, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A pH control device for hydrometallurgical iron removal, characterized by: It comprises pH meter one (1), controller (2), flow meter (3), regulating valve (4), pH meter two (5), mixing tank (6), drainage groove (7), infusion pipe one (8), infusion pipe two (9), reaction tank one (10), reaction tank two (11), reaction tank three (12), liquid feeding pipeline (13). The outlet of the drainage groove (7) and the liquid feeding pipeline (13) is connected with the inlet of the mixing tank (6), the outlet of the mixing tank (6) is connected with the reaction tank one (10) through a pipeline, the reaction tank one (10), the reaction tank two (11) and the reaction tank three (12) are connected in sequence through pipelines. The pH meter one (1) is installed at the outlet of the reaction tank one (10), the pH meter two (5) is installed on the drainage groove (7), the flow meter (3) and the regulating valve (4) are installed on the liquid feeding pipeline (13), the regulating valve (4) is located between the flow meter (3) and the mixing tank (6); the signal output ends of the pH meter one (1), the pH meter two (5) and the flow meter (3) are connected with the signal receiving end of the controller (2), the signal output end of the controller (2) is connected with the signal receiving end of the regulating valve (4).

2. The pH control device for removing iron in hydrometallurgy according to claim 1, characterized by: The infusion pipe one (8) and the infusion pipe two (9) are communicated with the inlet of the drainage groove (7).

3. The pH control device for removing iron in hydrometallurgy according to claim 1, characterized by: The pH meter one (1) is a post-reaction measuring point, and the pH meter two (5) is a pre-reaction measuring point.

4. The pH control device for removing iron in hydrometallurgy according to claim 1, characterized by: The mixing tank is made of steel lining PTFE material.

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