Detection system for operation state of mechanical seal of autoclave and autoclave

Abstract

The utility model relates to the technical field of hydrometallurgy autoclaves, and relates to an autoclave mechanical seal operation state detection system and an autoclave. The autoclave mechanical seal operation state detection system comprises an autoclave mechanical seal stirring system, a sealed water tank, a multi-stage vertical centrifugal circulating pump, a circulating water inlet pipeline, a circulating water return pipeline, a circulating water inlet pipeline flowmeter, a circulating water return pipeline flowmeter, a temperature transmitter and a temperature sensor, the autoclave mechanical seal stirring system is connected with a circulating water inlet and return pipeline, a flow meter and a temperature transmitter are arranged on the pipeline, a temperature sensor is installed on an autoclave mechanical seal, and the flow meter, the temperature transmitter and the temperature sensor are connected to a DCS control system to monitor flow and temperature abnormity in real time. Therefore, disposal measures can be taken in time, serious equipment faults caused by continuous operation under the abnormal condition of the mechanical seal are avoided, and the method has high positive significance in pre-detection and pre-stopping work of mechanical seal equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrometallurgical pressure kettles, in particular to a pressure kettle mechanical seal operation state detection system and the pressure kettle. Background Art

[0002] The domestic hydrometallurgical industry primarily uses leaching to recover metal materials. Pressure leaching, a classic and highly effective treatment process for nickel sulfide leaching in the nickel hydrometallurgical industry, involves mixing ore with acidic and alkaline solutions in a pressure autoclave. High-temperature, high-pressure leaching is employed to enhance the metallurgical process for ores that are difficult or inefficient to leach at normal pressure. As a key piece of equipment in the leaching process, the operation of the autoclave significantly impacts the continuous stability of production. The autoclave's agitator operates continuously throughout the autoclave, and its safe and stable operation significantly impacts its availability. Failures in the autoclave's agitator system primarily arise from the mechanical seal, a crucial component of the autoclave's containment system to prevent leakage from the agitator and the circumferential surface of the autoclave's stirring hole, ensuring the autoclave's tightness. During mechanical seal operation, circulating water within the seal is typically supplied through a sealed water tank and gear pump, providing both cooling and sealing. If the mechanical seal failure is not discovered in time by the on-duty personnel, the mechanical seal will be seriously damaged during operation and high maintenance costs will be incurred later, which will also affect the safe and stable operation of the autoclave. Utility Model Content

[0003] The purpose of this new application is to provide a pressure autoclave mechanical seal operating status detection system and a pressure autoclave, which is used to monitor the operating status of the stirring mechanical seal of the pressure autoclave in real time during operation, so as to promptly detect abnormal conditions of the mechanical seal during continuous operation of the pressure autoclave, thereby avoiding the high maintenance costs and negative impact on the operation of the pressure autoclave caused by serious damage to the mechanical seal. The specific technical solution is as follows:

[0004] A pressure autoclave mechanical seal operation status detection system includes: a pressure autoclave mechanical seal stirring system, a sealed water tank, a multi-stage vertical centrifugal circulation pump, a circulating water inlet pipe, a circulating water return pipe, a circulating water inlet pipe flowmeter, a circulating water return pipe flowmeter, a temperature transmitter and a temperature sensor. A sealed water tank cooling water inlet pipe and a sealed water tank cooling water return pipe are respectively provided on one side of the sealed water tank, and the bottom of the other side is connected to the circulating water inlet pipe. The other end of the circulating water inlet pipe is connected to the multi-stage vertical centrifugal circulation pump. The multi-stage vertical centrifugal circulation pump is connected to the multi-stage vertical centrifugal circulation pump via a plurality of The roots of circulation pipes are respectively connected to the multiple pressure autoclave mechanical seal stirring systems, the circulating water inlet pipe flowmeter and temperature transmitter are sequentially arranged on the circulation pipes, the temperature transmitter is close to the pressure autoclave mechanical seal stirring system, the multi-stage vertical centrifugal circulation pump and each circulation pipe are connected with a stop valve, the temperature sensor is arranged on the surface of the pressure autoclave mechanical seal stirring system, the multiple circulating water return pipes are respectively connected to the pressure autoclave mechanical seal stirring system and the sealed water tank, and the circulating water return pipe flowmeter is arranged on the circulating water return pipe.

[0005] Furthermore, a main shut-off valve and a thermometer are provided on the circulating water inlet pipe.

[0006] Furthermore, the upper stop valve of the circulation pipe and the main stop valve on the circulating water inlet pipe are solenoid valves.

[0007] Furthermore, it also includes a DCS control system, and the autoclave mechanical seal stirring system, circulating water inlet pipe flow meter, circulating water return pipe flow meter, temperature transmitter, temperature sensor and solenoid valve are all connected to the DCS control system.

[0008] A pressure autoclave provided with the above-mentioned pressure autoclave mechanical seal operation status detection system, the pressure autoclave mechanical seal stirring system includes a pressure autoclave mechanical seal and a stirring paddle, the pressure autoclave mechanical seal is fixed above the pressure autoclave, the stirring paddle is connected to the pressure autoclave mechanical seal and is arranged in the pressure autoclave, the circulation pipe and the circulating water return pipe are both connected to the pressure autoclave mechanical seal, and the temperature sensor is arranged on the surface of the pressure autoclave mechanical seal.

[0009] The beneficial effects of the present invention are as follows: the present invention is based on the existing common autoclave mechanical seal stirring system and on-site equipment layout, and sets flow and temperature sensors on the inlet and outlet pipes of the autoclave mechanical seal circulating water, sets a temperature sensor on the mechanical seal, and uploads the inlet and return water flow and the temperature of the autoclave mechanical seal to the DCS system display interface for real-time monitoring. A three-zone alarm is set for the inlet and return water flow and the mechanical seal temperature. The DCS alarm is promptly issued for abnormal operating flow and temperature, prompting the post to take timely disposal measures, thus avoiding serious equipment failures caused by continuous operation under abnormal mechanical seal conditions, and having a strong positive significance for the pre-inspection and pre-rest work of mechanical seal equipment. At the same time, the autoclave mechanical seal stirring system is also connected to the DSC system. If the flow exceeds the set value or the temperature reaches the upper limit, the stirring operation is automatically stopped, thereby minimizing the operating time of the mechanical seal with a fault. In addition, this device can monitor multiple autoclave mechanical seals at the same time, and solenoid valves and temperature monitoring devices are installed on the main and branch lines of the cooling water inlet pipeline. The opening and closing degree of the solenoid valves are controlled through temperature monitoring to ensure the healthy operation of the autoclave mechanical seals and reduce the failure of the autoclave mechanical seals caused by unstable cold water temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The following further describes the embodiments of the present invention with reference to the accompanying drawings, wherein:

[0011] Figure 1 Shown is a schematic structural diagram of the utility model.

[0012] Among them, 1-sealed water tank, 2-sealed water tank cooling water inlet pipe, 3-sealed water tank cooling water return pipe, 4-multi-stage vertical centrifugal circulation pump, 5-circulating water inlet pipe, 6-circulating water return pipe, 7-circulating water inlet pipe flowmeter, 8-circulating water return pipe flowmeter, 9-temperature transmitter, 10-temperature sensor, 11-pressure autoclave. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0014] A pressure autoclave 11 equipped with a pressure autoclave mechanical seal operation status detection system, the pressure autoclave mechanical seal stirring system includes a pressure autoclave mechanical seal and a stirring paddle, the pressure autoclave mechanical seal is fixed above the pressure autoclave 11, the stirring paddle is connected to the pressure autoclave mechanical seal and is arranged in the pressure autoclave, wherein the detection system includes: a pressure autoclave mechanical seal stirring system, a sealed water tank 1, a multi-stage vertical centrifugal circulation pump 4, a circulating water inlet pipe 5, a circulating water return pipe 6, a circulating water inlet pipe flowmeter 7, a circulating water return pipe flowmeter 8, a temperature transmitter 9, a temperature sensor 10 and a DSC control ... The paddle and the mechanical seal of the autoclave are fixed above the autoclave, the stirring paddle is connected to the mechanical seal of the autoclave and is arranged in the autoclave, and a sealing water tank cooling water inlet pipe 2 and a sealing water tank cooling water return pipe 3 are respectively provided on one side of the sealing water tank 1, and the bottom of the other side is connected to the circulating water inlet pipe 5, and the other end of the circulating water inlet pipe 5 is connected to the multi-stage vertical centrifugal circulating pump 4. The multi-stage vertical centrifugal circulating pump 4 is connected to multiple circulation pipes, and the multiple circulation pipes are respectively connected to multiple pressure autoclave mechanical seals. The connection between the multi-stage vertical centrifugal circulating pump 4 and the circulation pipe is provided with a stop valve (solenoid valve), and a main stop valve (solenoid valve) and a thermometer are provided on the circulating water inlet pipe 5. A circulating water inlet pipe flowmeter 7 and a temperature transmitter 9 are sequentially installed on the circulating pipe. The temperature transmitter 9 is located near the autoclave's mechanical seal and stirring system. A temperature sensor 10 is installed on the surface of the autoclave's mechanical seal on the autoclave 11. A circulating water return pipe 6 connects the autoclave's mechanical seal and the sealed water tank 1. A circulating water return pipe flowmeter 8 is installed on the circulating water return pipe 6. The autoclave's mechanical seal and stirring system, the circulating water inlet pipe flowmeter 7, the circulating water return pipe flowmeter 8, the temperature transmitter 9, the temperature sensor 10, the thermometer, and the solenoid valve are connected to the DCS control system. If the flow rate exceeds the set value or the temperature reaches the upper limit, the stirring operation is automatically stopped to minimize the time the mechanical seal operates with a fault. In addition, in this system, the circulating water inlet and return pipes are connected to the sealed water tank. Cooling water cools the circulating water in the sealed water tank through a jacket inside the sealed water tank. The jacket is connected to the sealed water tank's cooling water inlet pipe 2 and the sealed water tank's cooling water return pipe 3. This device monitors multiple autoclave mechanical seals simultaneously, and sets electromagnetic valves and temperature monitoring devices on the main and branch lines of the cooling water inlet pipeline. The opening and closing degree of the electromagnetic valve is controlled by the temperature condition monitored by the temperature transmitter 9 and the thermometer to ensure the healthy operation of the autoclave mechanical seal and reduce the malfunction of the autoclave mechanical seal caused by the unstable cold water temperature.

[0015] Some exemplary embodiments of the present invention are described above. It will be understood that the above embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention. The features in these embodiments can be recombined in an appropriate manner, and the solutions obtained thereby are still within the scope of protection claimed by the present invention. Based on the above embodiments, all other embodiments obtained by those skilled in the art without making any creative work, that is, all modifications, equivalent substitutions and improvements made within the spirit and principles of this application, fall within the scope of protection claimed by the present invention.

Claims

1. A pressure vessel mechanical seal operating status detection system, characterized in that: include: A pressure autoclave mechanical seal stirring system, a sealed water tank (1), a multi-stage vertical centrifugal circulation pump (4), a circulating water inlet pipe (5), a circulating water return pipe (6), a circulating water inlet pipe flowmeter (7), a circulating water return pipe flowmeter (8), a temperature transmitter (9) and a temperature sensor (10); one side of the sealed water tank (1) is provided with a sealed water tank cooling water inlet pipe (2) and a sealed water tank cooling water return pipe (3), and the bottom of the other side is connected to the circulating water inlet pipe (5); the other end of the circulating water inlet pipe (5) is connected to the multi-stage vertical centrifugal circulation pump (4); the multi-stage vertical centrifugal circulation pump (4) is connected to the multi-stage vertical centrifugal circulation pump (4) via multiple The circulation pipes are respectively connected to the plurality of pressure autoclave mechanical seal stirring systems, the circulation water inlet pipe flow meter (7) and the temperature transmitter (9) are sequentially arranged on the circulation pipes, the temperature transmitter (9) is close to the pressure autoclave mechanical seal stirring system, the connection between the multi-stage vertical centrifugal circulation pump (4) and each circulation pipe is provided with a stop valve, the temperature sensor (10) is arranged on the surface of the pressure autoclave mechanical seal stirring system, the plurality of circulation water return pipes (6) are respectively connected to the pressure autoclave mechanical seal stirring system and the sealed water tank (1), and the circulation water return pipe flow meter (8) is arranged on the circulation water return pipe (6).

2. The autoclave mechanical seal operation status detection system according to claim 1, characterized in that: A main shut-off valve and a thermometer are provided on the circulating water inlet pipe (5).

3. The autoclave mechanical seal operation status detection system according to claim 1, characterized in that: The upper stop valve of the circulation pipe and the main stop valve on the circulating water inlet pipe (5) are both solenoid valves.

4. The autoclave mechanical seal operation status detection system according to claim 3, characterized in that: It also includes a DCS control system, and the autoclave mechanical seal stirring system, the circulating water inlet pipe flow meter (7), the circulating water return pipe flow meter (8), the temperature transmitter (9), the temperature sensor (10), the thermometer and the solenoid valve are all connected to the DCS control system.

5. A pressure vessel equipped with a pressure vessel mechanical seal operation status detection system according to any one of claims 1 to 4, characterized in that: The pressure autoclave mechanical seal stirring system includes a pressure autoclave mechanical seal and a stirring paddle, wherein the pressure autoclave mechanical seal is fixed above the pressure autoclave, the stirring paddle is connected to the pressure autoclave mechanical seal and is arranged in the pressure autoclave, the circulation pipe and the circulation water return pipe (6) are both connected to the pressure autoclave mechanical seal, and the temperature sensor (10) is arranged on the surface of the pressure autoclave mechanical seal.

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