Normal-pressure chlorine leaching control device

Abstract

The utility model discloses a normal-pressure chlorine leaching control device, which belongs to the technical field of hydrometallurgy and comprises a leaching tank, a stirring motor, a residual chlorine discharge absorption pipe, a controller, a water inlet pipe, a steam pipe and a chlorine pipe. The output end of the stirring motor is connected with the stirring paddle through a transmission shaft, one ends of the residual chlorine emission absorption pipe, the water inlet pipe, the steam pipe and the chlorine pipe are all connected with the leaching tank, the inlet ends of the water inlet pipe, the steam pipe and the chlorine pipe are connected with a water source, a steam source and a chlorine source respectively, and an online ORP measuring instrument and an online thermometer are installed at the top of the leaching tank. The device has the beneficial effects that through an automatic control means, continuous measurement and automatic control of the chlorine leaching process are realized, the labor intensity of operators is reduced, unmanned operation of a chlorine leaching site is realized, and the site safety is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydrometallurgy, and in particular relates to a normal pressure chlorine leaching control device. Background Art

[0002] In the nickel-cobalt hydrometallurgical industry, nickel concentrate is leached by chlorination leaching. Nickel concentrate leaching equipment usually includes horizontal pressure leaching kettle, vertical pressure leaching kettle, atmospheric pressure leaching tank, etc. According to different leaching agents, it is divided into chlorine leaching tank, hydrochloric acid leaching tank, sulfuric acid leaching tank, oxygen leaching tank, etc. In the production of a certain electrolysis workshop, nickel concentrate, alloy concentrate and other nickel-containing materials are leached by chlorine at atmospheric pressure to supplement nickel ions and chloride ions for the production system.

[0003] The existing atmospheric pressure chlorine leaching equipment has problems such as low leaching rate, low chlorine utilization rate, low level of automation equipment, etc. The main problems are that important process parameters such as ORP potential value, chlorine flow rate, residual chlorine content in tail gas, and steam and chlorine addition are currently controlled manually, based on manual experience, with poor on-site control accuracy, high labor intensity, and difficult to control on-site safety. Utility Model Content

[0004] The technical problem to be solved by the utility model is to address the problems of poor on-site control accuracy and high manual labor intensity proposed in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A normal pressure chlorine leaching control device comprises a leaching tank, a stirring motor, a residual chlorine discharge absorption pipe, a controller, a water inlet pipe, a steam pipe and a chlorine pipe, wherein the leaching tank is provided with a stirring motor, a stirring paddle is arranged inside the leaching tank, the output end of the stirring motor is connected with the stirring paddle through a transmission shaft, one end of the residual chlorine discharge absorption pipe, the water inlet pipe, the steam pipe and the chlorine pipe are all connected with the leaching tank, the inlet ends of the water inlet pipe, the steam pipe and the chlorine pipe are respectively connected with a water source, a steam source and a chlorine source, and an online ORP meter and an online thermometer are installed on the top of the leaching tank.

[0007] The outlet end of the water inlet pipe extends to the inner top of the leaching tank, and the outlet ends of the steam pipe and the chlorine pipe extend to the inner bottom of the leaching tank.

[0008] A residual chlorine content sensor is installed on the residual chlorine discharge absorption pipe, and a water inlet valve and a water flow meter are installed on the water inlet pipe.

[0009] The steam pipe is equipped with a steam valve and a steam flow meter, and the chlorine pipe is equipped with a chlorine valve and a chlorine flow meter.

[0010] The stirring motor, online ORP measuring instrument, online thermometer, residual chlorine content sensor, water inlet valve, water flow meter, steam valve, steam flow meter, chlorine valve and chlorine flow meter are all connected with the controller signal.

[0011] A control method for a normal pressure chlorine leaching control device comprises the following steps:

[0012] S1. Input values: set the water volume target value, temperature control target value, residual chlorine control range and ORP potential control curve in the controller;

[0013] S2. Water addition control: After the slurry is added manually, the controller sends a control signal to open the water inlet valve, measures the real-time flow rate through the water flow meter, and calculates the cumulative water addition amount, and then closes the water inlet valve after the cumulative water addition amount reaches the set water volume target value;

[0014] S3. Steam heating control: The controller sends a control signal to open the steam valve, calculates the cumulative amount of steam added through the steam flow meter, and detects the temperature in the leaching tank in real time through the online thermometer until the temperature reaches the set temperature control target value and then closes the steam valve;

[0015] S4. Reaction process control: The controller sends a control signal to open the chlorine valve, and calculates the cumulative amount of chlorine added through the chlorine flowmeter. In this process, the residual chlorine content in the residual chlorine discharge absorption pipe and the ORP measurement value in the leaching tank are detected in real time through the residual chlorine content sensor and the online ORP measuring instrument. The opening of the chlorine valve is calculated in real time through the multi-parameter and multi-constraint control algorithm, so as to achieve the potential control target required by the process while ensuring that the residual chlorine emission does not exceed the standard.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. The controller, flow meter and valve can be used to accurately control the amount of water added and the temperature in the tank, providing stable starting conditions for the subsequent leaching process.

[0018] 2. Use the controller in conjunction with the chlorine valve, chlorine flowmeter, residual chlorine sensor, and online ORP meter to adjust the chlorine valve opening in real time through a multi-parameter and multi-constraint control algorithm. This can achieve the potential control target required by the process while taking into account the residual chlorine emission control, thereby achieving the goal of stabilizing the production process, improving production efficiency, and reducing raw material consumption.

[0019] 3. Through automatic control means, continuous measurement and automatic control of the chlorine leaching process can be achieved, the labor intensity of operators can be reduced, unmanned operation of the chlorine leaching site can be realized, and site safety can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a schematic diagram of an embodiment of the utility model.

[0021] Serial number and name of the attached drawings: 1-leaching tank, 2-stirring motor, 3-residual chlorine discharge absorption pipe, 4-controller, 5-water inlet pipe, 6-steam pipe, 7-chlorine gas pipe, 8-online ORP meter, 9-online thermometer, 10-residual chlorine content sensor, 11-water inlet valve, 12-water flow meter, 13-steam valve, 14-steam flow meter, 15-chlorine gas valve, 16-chlorine gas flow meter. DETAILED DESCRIPTION

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0023] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention. Example

[0024] like Figure 1 As shown, a normal pressure chlorine leaching control device described in the utility model comprises a leaching tank 1, a stirring motor 2, a residual chlorine discharge absorption pipe 3, a controller 4, a water inlet pipe 5, a steam pipe 6 and a chlorine pipe 7. The leaching tank 1 is equipped with a stirring motor 2, and a stirring paddle is arranged inside the leaching tank 1. The output end of the stirring motor 2 is connected to the stirring paddle through a transmission shaft. One end of the residual chlorine discharge absorption pipe 3, the water inlet pipe 5, the steam pipe 6 and the chlorine pipe 7 are all connected to the leaching tank 1. The inlet ends of the water inlet pipe 5, the steam pipe 6 and the chlorine pipe 7 are respectively connected to a water source, a steam source and a chlorine source. An online ORP meter 8 and an online thermometer 9 are installed on the top of the leaching tank 1.

[0025] The outlet end of the water inlet pipe 5 extends to the inner top of the leaching tank 1 , and the outlet ends of the steam pipe 6 and the chlorine pipe 7 extend to the inner bottom of the leaching tank 1 .

[0026] A residual chlorine content sensor 10 is installed on the residual chlorine discharge absorption pipe 3 , and a water inlet valve 11 and a water flow meter 12 are installed on the water inlet pipe 5 .

[0027] The steam pipe 6 is provided with a steam valve 13 and a steam flow meter 14 , and the chlorine pipe 7 is provided with a chlorine valve 15 and a chlorine flow meter 16 .

[0028] The stirring motor 2, online ORP meter 8, online thermometer 9, residual chlorine content sensor 10, water inlet valve 11, water flow meter 12, steam valve 13, steam flow meter 14, chlorine valve 15 and chlorine flow meter 16 are all connected to the controller 4 by signal.

[0029] A control method for a normal pressure chlorine leaching control device comprises the following steps:

[0030] S1. Input values: set the water volume target value, temperature control target value, residual chlorine control range and ORP potential control curve in the controller;

[0031] S2. Water addition control: After the slurry is added manually, the controller sends a control signal to open the water inlet valve, measures the real-time flow rate through the water flow meter, and calculates the cumulative water addition amount, and then closes the water inlet valve after the cumulative water addition amount reaches the set water volume target value;

[0032] S3. Steam heating control: The controller sends a control signal to open the steam valve, calculates the cumulative amount of steam added through the steam flow meter, and detects the temperature in the leaching tank in real time through the online thermometer until the temperature reaches the set temperature control target value and then closes the steam valve;

[0033] S4. Reaction process control: The controller sends a control signal to open the chlorine valve, and calculates the cumulative amount of chlorine added through the chlorine flowmeter. In this process, the residual chlorine content in the residual chlorine discharge absorption pipe 3 and the ORP measurement value in the leaching tank are detected in real time through the residual chlorine content sensor and the online ORP measuring instrument. The opening of the chlorine valve is calculated in real time through a multi-parameter and multi-constraint control algorithm, so as to achieve the potential control target required by the process while ensuring that the residual chlorine emission does not exceed the standard.

[0034] The leaching tank 1 is lined with glass fiber reinforced plastics, rubber and other materials; the residual chlorine sensor 10 is an electrochemical sensor; the stirring motor 2 is a variable frequency or fixed frequency motor; the water inlet valve 11, steam valve 13 and chlorine valve 15 are pneumatic or electric regulating valves, and the valve core is a ball valve, butterfly valve and other structures; the water flow meter 12, steam flow meter 14 and chlorine flow meter 16 are electromagnetic flow meters or mass flow meters.

[0035] By using the controller in conjunction with the flow meter and valve, the amount of water added and the temperature in the tank can be accurately controlled, providing stable starting conditions for the subsequent leaching process; using the controller in conjunction with the chlorine valve, chlorine flow meter, residual chlorine sensor, and online ORP meter, the chlorine valve opening can be adjusted in real time through a multi-parameter and multi-constraint control algorithm, which can achieve the potential control target required by the process while taking into account the residual chlorine emission control, and achieve the goals of stabilizing the production process, improving production efficiency, and reducing raw material consumption; through automatic control means, continuous measurement and automatic control of the chlorine leaching process can be achieved, reducing the labor intensity of operators, realizing unmanned operation of the chlorine leaching site, and improving site safety.

[0036] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the embodiments above is only applicable to help understand the principles of the embodiments of the present invention.

Claims

1. A normal pressure chlorine leaching control device, comprising a leaching tank (1), a stirring motor (2), a residual chlorine exhaust absorption pipe (3), a controller (4), a water inlet pipe (5), a steam pipe (6) and a chlorine pipe (7), characterized in that: The leaching tank (1) is provided with a stirring motor (2), and a stirring paddle is arranged inside the leaching tank (1). The output end of the stirring motor (2) is connected to the stirring paddle via a transmission shaft. One end of the residual chlorine discharge absorption pipe (3), the water inlet pipe (5), the steam pipe (6) and the chlorine pipe (7) are all connected to the leaching tank (1). The inlet ends of the water inlet pipe (5), the steam pipe (6) and the chlorine pipe (7) are respectively connected to a water source, a steam source and a chlorine source. An online ORP measuring instrument (8) and an online thermometer (9) are installed on the top of the leaching tank (1).

2. A normal pressure chlorine leaching control device according to claim 1, characterized in that: The outlet end of the water inlet pipe (5) extends to the inner top of the leaching tank (1), and the outlet ends of the steam pipe (6) and the chlorine pipe (7) extend to the inner bottom of the leaching tank (1).

3. A normal pressure chlorine leaching control device according to claim 2, characterized in that: The residual chlorine discharge absorption pipe (3) is provided with a residual chlorine content sensor (10), and the water inlet pipe (5) is provided with a water inlet valve (11) and a water flow meter (12).

4. A normal pressure chlorine leaching control device according to claim 3, characterized in that: The steam pipe (6) is installed with a steam valve (13) and a steam flow meter (14), and the chlorine pipe (7) is installed with a chlorine valve (15) and a chlorine flow meter (16).

5. A normal pressure chlorine leaching control device according to claim 4, characterized in that: The stirring motor (2), the online ORP measuring instrument (8), the online thermometer (9), the residual chlorine content sensor (10), the water inlet valve (11), the water flow meter (12), the steam valve (13), the steam flow meter (14), the chlorine valve (15) and the chlorine flow meter (16) are all connected to the controller (4) by signals.

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