Upper inlet type valve group of oxygen pressure leaching autoclave

Abstract

The utility model discloses an upper inlet type valve group of an oxygen pressure leaching autoclave. The upper inlet type valve group comprises an oxygen pressure leaching autoclave, a tee joint, a first oxygen special valve, an oxygen pneumatic control valve, a second oxygen special valve, an oxygen flow meter, an oxygen pneumatic cut-off valve, a nitrogen manual valve, a check valve, an oxygen special pipe, a communicating pipe, a nitrogen pipe and a kettle inlet pipe, the oxygen pressure leaching kettle is a horizontal titanium-lined kettle or a lead-lined and brick-lined kettle; the oxygen inlet is positioned on the upper side surface of the autoclave; the special oxygen pipe is connected with an outer net oxygen main pipe, enters the autoclave and extends to the position under the stirrer; an oxygen flow meter, a second oxygen special valve, an oxygen pneumatic control valve, a first oxygen special valve and a check valve are sequentially arranged; the nitrogen pipe is connected with an outer net nitrogen header pipe and is in a closed state during oxygen introduction production through a nitrogen manual valve switch; the tee joint is connected with a special oxygen pipe; the communicating pipe is connected with the special oxygen pipe and the nitrogen pipe, is provided with the oxygen pneumatic cut-off valve and is in a closed state during oxygen production.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydrometallurgical pressure leaching, and in particular relates to an oxygen pressure leaching pressure kettle top-entry valve group. Background Art

[0002] In nickel-cobalt pressure leaching, oxygen enrichment technology, replacing air blast, can enhance production and improve productivity. Pressurized oxygen leaching promotes the decomposition and transformation of minerals through the interaction of oxygen and saline solution, thereby achieving the extraction and enrichment of metals. However, oxygen has a strong oxidizing and combustion-supporting effect, and can cause severe explosions when exposed to mixed gases, friction, and static electricity. Therefore, the proper configuration of the oxygen supply piping and valve assembly in the autoclave is crucial.

[0003] The bottom-feed oxygen pipe enters the autoclave compartment from the bottom. This can easily lead to pipe blockage when slurry is poured into the pipe during shutdown, maintenance, or troubleshooting. Once the oxygen pipe is blocked, nitrogen gas must be switched to clear the blockage. In severe cases, the pipe and valves must be dismantled and cleared piece by piece, increasing workload and safety risks while also impacting production efficiency. Therefore, developing a top-feed pipe and valve assembly is crucial. Utility Model Content

[0004] The utility model provides an oxygen pressure leaching autoclave top-entry valve group, which aims to solve the problem of oxygen pipe blockage, reduce the failure rate of the autoclave, and improve operation efficiency and safety reliability.

[0005] To this end, the present invention adopts the following technical solutions:

[0006] An oxygen pressure leaching autoclave top-inlet valve group, characterized by comprising an oxygen pressure leaching autoclave, a tee, a first oxygen-specific valve, an oxygen pneumatic regulating valve, a second oxygen-specific valve, an oxygen flow meter, an oxygen pneumatic shut-off valve, a nitrogen manual valve, a check valve, an oxygen-specific pipe, a connecting pipe, a nitrogen pipe, and an autoclave inlet pipe;

[0007] The oxygen pressure leaching kettle is a horizontal titanium lined kettle or a lead lined and brick lined kettle; the oxygen inlet is located on the upper side of the pressure kettle;

[0008] The oxygen dedicated pipe is connected from the external oxygen main pipe, enters the autoclave and extends to the bottom of the agitator; oxygen flow meter, second oxygen dedicated valve, oxygen pneumatic regulating valve, first oxygen dedicated valve and check valve are installed in sequence;

[0009] The nitrogen pipe is connected to the nitrogen main pipe of the external network, and is switched by the nitrogen manual valve. It is in the closed state during oxygen production; it is connected to the oxygen dedicated pipe through a tee.

[0010] The connecting pipe connects the oxygen-specific pipe and the nitrogen pipe, and an oxygen pneumatic shut-off valve is installed, which is in a closed state during oxygen production.

[0011] Furthermore, the first oxygen-specific valve, oxygen pneumatic regulating valve, second oxygen-specific valve, oxygen flow meter, oxygen pneumatic shut-off valve, nitrogen manual valve, and check valve are all flange-connected, and a jumper wire is used between the two flanges.

[0012] Furthermore, the oxygen pneumatic regulating valve is interlocked with the oxygen flow meter, and the valve opening can be adjusted through the DCS system, thereby adjusting the oxygen flow.

[0013] The beneficial effects of the present invention are:

[0014] The utility model is installed on the top side of each compartment of the pressure autoclave, realizing the precise control and regulation of oxygen, nitrogen replacement, top pressure and other functions, solving the problems of easy blockage, difficult maintenance and frequent failures of the bottom-inlet valve group pipeline, reducing the failure rate of the pressure autoclave and improving the production efficiency of the pressure autoclave. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a system schematic diagram of the utility model;

[0016] In the figure: oxygen pressure leaching kettle 1, tee 2, first oxygen dedicated valve 3, oxygen pneumatic regulating valve 4, second oxygen dedicated valve 5, oxygen flow meter 6, oxygen pneumatic shut-off valve 7, nitrogen manual valve 8, check valve 9, oxygen dedicated pipe 10, connecting pipe 11, nitrogen pipe 12, kettle inlet pipe 13. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0018] like Figure 1 As shown, an oxygen pressure leaching autoclave top-inlet valve group includes an oxygen pressure leaching autoclave 1, a tee, an oxygen-specific valve, an oxygen pneumatic regulating valve 4, an oxygen-specific valve, an oxygen flowmeter 6, an oxygen pneumatic shut-off valve 7, a nitrogen manual valve 8, a check valve 9, an oxygen-specific pipe 10, a connecting pipe 11, a nitrogen pipe 12 and an autoclave inlet pipe 13.

[0019] The oxygen pressure leaching kettle 1 is a horizontal titanium-lined kettle or a lead-lined and brick-lined kettle; the oxygen inlet is located on the upper side of the pressure kettle.

[0020] The oxygen pipe 10 is connected to the external oxygen main pipe, enters the autoclave from the top and extends directly below the agitator. An oxygen flow meter 6, a second oxygen valve 5, an oxygen pneumatic regulating valve 4, a first oxygen valve 3, and a check valve 9 are installed in sequence.

[0021] The nitrogen pipe 12 is connected to the nitrogen main pipe of the external network, is switched by the nitrogen manual valve 8, and is in a closed state during oxygen production; and is connected to the oxygen dedicated pipe 10 through a tee.

[0022] The connecting pipe 11 connects the oxygen dedicated pipe 10 and the nitrogen pipe 12, and is installed with an oxygen pneumatic shut-off valve 7, which is in a closed state during oxygen production.

[0023] The first oxygen dedicated valve 3, the oxygen pneumatic regulating valve 4, the second oxygen dedicated valve 5, the oxygen flow meter 6, the oxygen pneumatic shut-off valve 7, the nitrogen manual valve 8, and the check valve 9 are all flange-connected, and a jumper wire is used between the two flanges.

[0024] The oxygen pneumatic regulating valve is interlocked with the oxygen flow meter 6, and the valve opening can be adjusted through the DCS system to adjust the oxygen flow.

[0025] When starting production, pre-pressurize and confirm in advance that the first oxygen-specific valve 3, the oxygen pneumatic regulating valve 4, the second oxygen-specific valve 5, and the oxygen pneumatic shut-off valve 7 are in the closed state; open the nitrogen manual valve 8 and use the nitrogen pressure to pre-pressurize the autoclave to 0.5 MPa.

[0026] Feed oxygen, close the nitrogen manual valve 8, and open the first oxygen-specific valve 3, the oxygen pneumatic regulating valve 4, and the second oxygen-specific valve 5 in sequence; adjust the required oxygen flow rate through the interlocking relationship between the oxygen pneumatic regulating valve 4 and the oxygen flowmeter 6; the first oxygen-specific valve 3 and the second oxygen-specific valve 5 are in the open state, and the opening size is not adjusted.

[0027] When troubleshooting the oxygen pneumatic regulating valve 4, close the first oxygen-specific valve 3 and the second oxygen-specific valve 5 and replace them; open the oxygen pneumatic shut-off valve 7 to continue production.

[0028] When troubleshooting the autoclave, it is necessary to sequentially shut down the oxygen exchange. When the autoclave pressure is ≤0.1MPa, the second oxygen-only valve 5, the oxygen pneumatic regulating valve 4, and the first oxygen-only valve 3 are sequentially closed, and the nitrogen manual valve 8 is opened to exchange the nitrogen in the autoclave.

Claims

1. An oxygen pressure leaching autoclave top-entry valve group, characterized in that: It comprises an oxygen pressure leaching kettle (1), a three-way valve (2), a first oxygen-specific valve (3), an oxygen pneumatic regulating valve (4), a second oxygen-specific valve (5), an oxygen flow meter (6), an oxygen pneumatic shut-off valve (7), a nitrogen manual valve (8), a check valve (9), an oxygen-specific pipe (10), a connecting pipe (11), a nitrogen pipe (12), and a kettle inlet pipe (13); The oxygen pressure leaching kettle (1) is a horizontal titanium-lined kettle or a lead-lined and brick-lined kettle; the oxygen inlet is located on the upper side of the pressure kettle; The oxygen dedicated pipe (10) is connected to the oxygen main pipe of the external network, enters the autoclave and extends to the bottom of the stirrer; an oxygen flow meter (6), a second oxygen dedicated valve (5), an oxygen pneumatic regulating valve (4), a first oxygen dedicated valve (3), and a check valve (9) are sequentially arranged; The nitrogen pipe (12) is connected to the nitrogen main pipe of the external network, and is switched by the nitrogen manual valve (8). It is in a closed state during oxygen production; it is connected to the oxygen dedicated pipe (10) through the tee (2); The connecting pipe (11) is connected to the oxygen dedicated pipe (10) and the nitrogen pipe (12), and an oxygen pneumatic shut-off valve (7) is installed, which is in a closed state during oxygen production.

2. The oxygen pressure leaching autoclave top-entry valve group according to claim 1, characterized in that: The first oxygen-specific valve (3), the oxygen pneumatic regulating valve (4), the second oxygen-specific valve (5), the oxygen flow meter (6), the oxygen pneumatic shut-off valve (7), the nitrogen manual valve (8), and the check valve (9) are all flange-connected, and a jumper wire is used between the two flanges.

3. The upward-entry valve group of the oxygen pressure leaching autoclave according to claim 1, characterized in that: The oxygen pneumatic regulating valve is interlocked with the oxygen flow meter for control, and the valve opening can be adjusted through the DCS system, thereby adjusting the oxygen flow.

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