Automatic vacuum stabilizing system for decomposing tank cooling plate siphon feed pipe

Abstract

The present application belongs to the technical field of alumina production, and specifically relates to an automatic vacuum stabilizing system for a plate siphon feed pipe of a decomposing tank, which comprises a siphon automatic vacuum pumping mechanism, a gas-liquid separation and automatic discharging mechanism, and a valve control mechanism, wherein the mechanisms are connected through pipelines and realize signal linkage; a float ball liquid level meter is arranged at the top of the siphon, and a gas-liquid separator is connected in series on the vacuum pumping pipeline, and each component is linked with the valve to realize automatic control. The present application can simultaneously remove free air in the siphon and residual air entrained by foam, realize closed-loop automatic operation, ensure stable and continuous siphon effect, improve production continuity, adapt to a decomposing mother liquor conveying system prone to foam, and can be directly installed on the basis of existing equipment, and is suitable for a wide range of applications.

Description

Technical Field

[0001] This invention relates to the field of alumina production technology, specifically to an automatic vacuum stabilization system for a decomposition tank cooling plate siphon feed pipe. Background Technology

[0002] In the alumina decomposition process, the decomposition tank requires a cooling plate siphon feed pipe to transport the decomposition mother liquor and perform intermediate cooling treatment. This process is a crucial step in ensuring the continuous operation of alumina production. However, the operation of the siphon pipe in the existing technology has the following defects, which seriously affect production stability.

[0003] Air tends to accumulate at the top of the siphon tube. This air cannot escape naturally, creating air resistance that directly hinders liquid flow, making it difficult to establish the siphon effect. Furthermore, the slurry contains a large amount of foam, which continuously accumulates at the top of the siphon tube. The air trapped in the foam is difficult to remove from the liquid system, further exacerbating air resistance and reducing siphon efficiency. The combined effect of these problems directly disrupts the siphon effect, causing a significant decrease in feeding efficiency, frequent interruptions in the conveying process, and severely impacting production continuity. Existing improvement measures only address one specific problem, offering limited effectiveness and poor operational stability, failing to fundamentally resolve the potential for siphon failure. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an automatic vacuum stabilization system for a decomposition tank cooling plate siphon feed pipe. This system simultaneously removes air accumulation and foam residue from the siphon pipe, ensuring a stable and continuous siphon effect, improving the continuity of mother liquor transportation and cooling treatment, and reducing the risk of production interruption.

[0005] To achieve the above objectives, the present invention provides the following technical solution: An automatic vacuum stabilization system for a decomposition tank cooling plate siphon feed pipe includes an automatic vacuum pumping mechanism for the siphon pipe, a gas-liquid separation and automatic feeding mechanism, and a valve control mechanism. The mechanisms are connected by pipelines and achieve signal linkage. The automatic vacuuming mechanism of the siphon tube includes a float level gauge installed on the top of the siphon tube. The float level gauge is equipped with a guide tube and a built-in magnet, and is also equipped with a magnet probe. The gas-liquid separation and automatic feeding mechanism includes a gas-liquid separator connected in series in the vacuum pipeline. The gas-liquid separator is equipped with a level gauge, a feeding valve at the bottom, and an air inlet valve at the top. The valve control mechanism includes a discharge interlock and a vacuum interlock, and the corresponding operation is achieved by controlling the valve opening and closing sequence.

[0006] Preferably, the float of the float level gauge rises and falls synchronously with the liquid level in the siphon tube. When the liquid level drops to a set threshold, the built-in magnet moves with the float and triggers the outer magnet probe to start the automatic vacuuming operation.

[0007] Preferably, the gas-liquid separator is used to separate the foam and liquid entrained during the vacuuming process. The liquid accumulates at the bottom of the separator. When the liquid level reaches a set threshold, an automatic discharge operation is triggered to prevent liquid backflow or overflow.

[0008] Preferably, the gas-liquid separation and automatic discharge mechanism further includes a first valve and a second valve. The gas-liquid separator is connected to the siphon pipe through the first valve and to the vacuum pump through the second valve. When the gas-liquid separator level gauge triggers a high level signal, the second valve and the first valve are closed in sequence to cut off the vacuum passage. Then, the discharge valve and the air inlet valve are opened to complete the rapid discharge of liquid in the separator through the air pressure difference.

[0009] Preferably, when the float level gauge triggers a low level signal, the air inlet valve and the discharge valve are closed in sequence to cut off the discharge passage and the air inlet passage. Then, the first valve and the second valve are opened, and the vacuum pump is started to perform a vacuuming operation.

[0010] Preferably, the gas-liquid separator is connected to the top of the siphon tube through a pipeline to form a gas-liquid flow path, and the vacuum pump is connected to the gas-liquid separator through the first valve and the second valve to form a vacuum circuit. Each valve is linked to the corresponding liquid level gauge through a signal line to achieve fully automated control.

[0011] Preferably, the float level gauge has a guide ring on its outer side to limit the rise and fall trajectory of the float, ensure the triggering accuracy of the built-in magnet and the magnet probe, and improve the response stability of the vacuum interlock.

[0012] Preferably, the exhaust port of the vacuum valve is connected to a directional exhaust hood, and a pressure balancing valve is installed on the top of the hood to automatically release pressure when the exhaust pressure exceeds 0.1 MPa; the exhaust hood is connected to an insulated pipe, and the insulated pipe is connected to a spiral sleeve that is connected to a heat exchanger.

[0013] Preferably, the spiral shell-and-tube heat exchanger is connected to a manifold, and the output end of the manifold is connected to a siphon.

[0014] Preferably, the cold decomposition mother liquor to be transported is divided into a main path and a branch path via a diversion valve. The main path enters the annular heat exchange chamber of the spiral sleeve heat exchanger, and the branch path connects to the manifold device.

[0015] This invention provides an automatic vacuum stabilization system for a decomposition tank cooling plate-type siphon feed pipe. Compared with the prior art, it has the following advantages: 1. By linking the float level gauge, magnetic probe, and signals from each level gauge and valve, the entire process of vacuuming, gas-liquid separation, and automatic material discharge is fully automated, eliminating the need for manual supervision, reducing labor costs, and avoiding human error.

[0016] 2. The float level gauge monitors the liquid level changes in the siphon tube in real time, accurately triggering the start and stop of the vacuuming operation to ensure that the vacuum degree in the siphon tube is maintained within a stable range, avoiding feed interruption due to insufficient vacuum degree or equipment damage caused by excessive vacuum degree.

[0017] 3. The gas-liquid separator effectively separates the foam and liquid entrained during the vacuuming process, preventing them from entering the vacuum pump and corroding its components, thus extending the service life of the vacuum pump and related pipelines and reducing equipment maintenance costs.

[0018] 4. Waste heat from the vacuum pump can be recovered at a rate of 1-3kW per hour, which is equivalent to reducing the energy consumption of electric heat tracing and saving 10,000-30,000 kWh of electricity per year. This achieves the cascade utilization of energy and reduces production energy consumption.

[0019] 5. This system can be directly installed on the basis of the existing decomposition tank cooling plate siphon feed pipe equipment without making major modifications to the original production line. The modification is simple and the cost is controllable. It is suitable for the decomposition mother liquor conveying system in non-ferrous metallurgical alumina production that is prone to foaming. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the system structure of the present invention.

[0021] In the diagram: 1. Gas-liquid separator; 2. Level gauge; 3. Guide cylinder; 4. Float level gauge; 5. Guide ring; 6. Magnetic probe; 7. Built-in magnet; 8. First valve; 9. Second valve; 10. Discharge valve; 11. Air inlet valve; 12. Vacuum pump; 13. Directional exhaust hood; 14. Insulation pipe; 15. Spiral pipe heat exchanger; 16. Diverter valve assembly; 17. Manifold. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figure 1 The present invention provides a technical solution: an automatic vacuum stabilization system for a decomposition tank cooling plate type siphon feed pipe.

[0024] In one embodiment of the present invention, the automatic vacuum stabilization system 1 of the decomposition tank cooling plate siphon feed pipe includes an automatic vacuum pumping mechanism for the siphon pipe, a gas-liquid separation and automatic feeding mechanism, and a valve control mechanism. The mechanisms are connected by pipelines and achieve signal linkage.

[0025] The core component of this device is a float level gauge 4 specially adapted to the siphon structure. It is securely installed at the reserved interface at the top of the siphon via flange connection or welding, ensuring that the float can fully adapt to the range of liquid level changes in the siphon. Its core function is to monitor the liquid level fluctuations in the siphon in real time and dynamically, and convert the liquid level signal into a control signal that can trigger the action of the actuator, providing a reliable basis for the precise start and stop of vacuuming operations.

[0026] The float level gauge 4 is equipped with a high-strength, corrosion-resistant guide cylinder 3 and a built-in high-performance permanent magnet. The guide cylinder 3 is made of 316L stainless steel, which has good resistance to acid and alkali corrosion and can adapt to the harsh working conditions of decomposition mother liquor. It can ensure that the float rises and falls smoothly along a fixed axis inside, effectively avoiding the float shaking caused by liquid fluctuations such as turbulence and impact during the transportation of decomposition mother liquor, thereby greatly reducing the error of level monitoring and ensuring the stability of monitoring data.

[0027] The built-in magnet 7 embedded inside the float is made of neodymium iron boron strong magnetic material, which has the characteristics of stable magnetic performance and long sensing distance. It can move synchronously with the rise and fall of the float. At the same time, a high-sensitivity magnetic probe 6 is precisely installed on the outer wall of the float level gauge 4 along the movement trajectory of the float. It forms an efficient magnetic coupling induction cooperation with the built-in magnet 7. When the built-in magnet 7 moves with the float to the probe sensing area, the probe can quickly capture the magnetic signal and convert it into an electrical signal, which provides a strong guarantee for the timely start and stop of subsequent vacuuming operations.

[0028] Furthermore, a guide ring 5 is provided on the outer side of the float level gauge 4, which, together with the guide cylinder 3, forms a double guiding structure, further limiting the rising and falling trajectory of the float and improving the stability and accuracy of level monitoring. The float rises and falls synchronously with the changes in the liquid level in the siphon tube. When the liquid level drops to the set threshold, the built-in magnet moves to the corresponding position with the float, triggering the outer magnet probe 6. The magnet probe 6 then sends an electrical signal to the control system to start the automatic vacuuming operation. When the liquid level rises back to the normal range, the built-in magnet leaves the probe sensing area, and the vacuuming operation stops, realizing automatic start and stop control of vacuuming.

[0029] The gas-liquid separation and automatic discharge mechanism includes a gas-liquid separator 1 connected in series in the vacuum pipeline. Its core function is to separate the foam and liquid entrained in the airflow during the vacuuming process, preventing foam and liquid from entering the vacuum pump 12 and causing equipment damage. The gas-liquid separator 1 is equipped with a level gauge 2 for real-time monitoring of the liquid volume inside the separator; a discharge valve 10 is provided at the bottom for discharging the accumulated liquid; and an air inlet valve 11 is provided at the top for introducing air during the discharge process to create a pressure difference and accelerate discharge.

[0030] Specifically, the gas-liquid separator 1 is connected to the top of the siphon tube via a pipeline, forming a gas-liquid flow path. During the vacuuming process, the gas in the siphon tube carries foam and some liquid into the gas-liquid separator 1. Inside the separator, the gas rises and is discharged from the top, while the foam and liquid settle to the bottom of the separator due to gravity. When the liquid level gauge 2 detects that the liquid at the bottom has reached a set threshold, it triggers an automatic discharge operation to prevent liquid from flowing back into the siphon tube or overflowing the separator.

[0031] In addition, the gas-liquid separation and automatic feeding mechanism also includes a first valve 8 and a second valve 9. The first valve 8 is located on the connecting pipe between the gas-liquid separator 1 and the siphon pipe, and the second valve 9 is located on the connecting pipe between the gas-liquid separator 1 and the vacuum pump 12. The switching between the vacuuming passage and the feeding passage is realized by controlling the opening and closing of these two valves.

[0032] The valve control mechanism includes a discharge interlock and a vacuum interlock. Through preset valve opening and closing sequences, it ensures the orderly connection of operations such as vacuuming, gas-liquid separation, and automatic discharge, guaranteeing the stability and safety of the system. Each valve is linked to its corresponding level gauge via signal lines, achieving fully automated control without manual intervention.

[0033] In the material discharge interlock control, when the level gauge 2 of the gas-liquid separator 1 triggers a high level signal, the control system first sequentially closes the second valve 9 and the first valve 8, cutting off the connection between the gas-liquid separator 1 and the vacuum pump 12 and the siphon pipe, thus cutting off the vacuuming path. Then, it opens the discharge valve 10 and the air inlet valve 1, allowing external air to enter the gas-liquid separator 1, creating an internal and external pressure difference. Under this pressure difference, the liquid accumulated at the bottom of the separator is quickly discharged through the discharge valve 10. When the level gauge 2 detects that the liquid level has dropped to the low threshold, the discharge valve 10 and the air inlet valve 11 close, completing the material discharge operation.

[0034] In the vacuum interlock control, when the float level gauge 4 triggers a low level signal, the control system first sequentially closes the air inlet valve 11 and the discharge valve 10, cutting off the discharge passage and the air inlet passage to ensure system sealing. Then, it opens the first valve 8 and the second valve 9, starting the vacuum pump 12 to perform vacuuming, maintaining a stable vacuum in the siphon tube and facilitating the smooth transport of the decomposed mother liquor. When the liquid level in the siphon tube rises back to the normal threshold, the float level gauge 2 sends a stop signal, the vacuum pump 12 stops operating, and the first valve 8 and the second valve 9 close, awaiting the next vacuuming command.

[0035] The gas-liquid separator 1 is connected to the top of the siphon tube through a pipeline to form a gas-liquid flow path. The vacuum pump 12 is connected to the gas-liquid separator 1 through the first valve 8 and the second valve 9 to form a vacuum circuit. Each valve is linked to the corresponding liquid level gauge through a signal line to achieve fully automated control.

[0036] The exhaust port of vacuum pump 12 is connected to directional exhaust hood 13. A pressure balancing valve is installed on the top of the hood, which automatically releases pressure when the exhaust pressure exceeds 0.1MPa. Directional exhaust hood 13 is connected to insulation pipe 14, and insulation pipe 14 is connected to spiral shell heat exchanger 15.

[0037] The directional exhaust hood 13 adopts a conical flow-concentrating structure with a high-temperature resistant ceramic coating on the inner wall to reduce heat loss. The hood is connected to the exhaust pipe flange, and the sealing surface uses a fluororubber gasket to prevent air leakage and heat loss. The insulation pipe 14 is made of 316L stainless steel, with a wall thickness of 3-5mm designed according to vacuum requirements. It is wrapped with a double-layer insulation structure, with an inner layer of 50mm thick aluminum silicate fiber cotton and an outer layer of aluminum foil fiberglass cloth to ensure low heat loss during transportation. Fixed supports are installed every 1.5m along the pipe, and rubber shock-absorbing pads are installed between the supports and the pipe to prevent vibration from causing leakage at the pipe connection.

[0038] The spiral shell-and-tube heat exchanger 15 adopts a nested design of inner and outer tubes. The inner tube is the exhaust pipe of the vacuum pump 12, and the outer tube is the heat exchange sleeve. The two are arranged coaxially to form an annular heat exchange cavity. Spiral guide fins are welded to the inner wall of the outer tube to force the cold decomposition mother liquor to swirl, thereby improving the heat transfer coefficient. The inner and outer tubes and fins are all made of Hastelloy alloy. The interior of the heat exchange cavity is polished to reduce scale buildup. The heat exchange area is designed based on the vacuum pump exhaust volume and waste heat power to ensure that the temperature of the cold decomposition mother liquor increases by 5-8℃ when it passes through the heat exchanger.

[0039] The cold decomposition mother liquor to be transported is divided into a main path and a branch path by the diversion valve group 16. The main path enters the annular heat exchange chamber of the spiral shell heat exchanger 15, and the branch path is connected to the manifold device 17. The spiral shell heat exchanger 15 is connected to the manifold device 17, and the output end of the manifold device 17 is connected to the siphon pipe.

[0040] Understandably, the diversion valve assembly 17 divides the cold mother liquor to be transported into a main line and branch lines. The main line enters the heat exchange jacket, while the branch lines are reserved for backup and can be flexibly adjusted according to the amount of residual heat. A temperature mixer is installed at the junction to ensure uniform mother liquor temperature after heat exchange. The diversion valve assembly 16 is equipped with an electric regulating ball valve, which is linked to a temperature sensor to automatically adjust the flow ratio between the main line and the branch lines, precisely controlling the temperature rise of the mother liquor. One-way valves are installed on the branch lines to prevent the hot mother liquor from flowing back from the main line to the branch lines, ensuring loop stability. The junction device 17 has a static mixer inside to fully mix the hot mother liquor from the main line and the cold mother liquor from the branch lines, avoiding uneven local temperatures.

[0041] It should be noted that a PT100 platinum resistance temperature sensor is installed at the exhaust port of vacuum pump 12, the inlet and outlet of spiral pipe heat exchanger 15, the three-section loop of siphon pipe, and the mother liquor inlet to collect temperature data at each node in real time; an electromagnetic flow meter is installed at the cold mother liquor inlet of spiral pipe heat exchanger 15 to monitor the medium flow rate; and pressure sensors are installed at the inlet and outlet of spiral pipe heat exchanger and at the end of the heat tracing pipeline to prevent overpressure in the pipeline.

[0042] Operation Process: During the transport of alumina decomposition mother liquor, the liquid level in the siphon gradually decreases due to feed consumption. The float descends synchronously with the liquid level. When the liquid level drops to a set low threshold, such as 1 / 3 of the siphon height, the built-in magnet 7 inside the float moves to the sensing area of ​​the magnet probe 6, which then sends a low liquid level signal to the control system. Upon receiving the signal, the control system immediately executes a vacuum interlocking procedure: first, it closes the air inlet valve 11 and the discharge valve 10 to ensure the gas-liquid separator 1 is sealed; then, it opens the first valve 8 and the second valve 9, and starts the vacuum pump 12 to perform a vacuum operation inside the siphon. As the vacuum level increases, the decomposition mother liquor enters the siphon under the pressure difference, and the liquid level in the siphon gradually rises.

[0043] During the vacuuming process, the gas in the siphon tube carries the foam and a small amount of liquid generated from the decomposition of the mother liquor into the gas-liquid separator 1. The gas rises in the gas-liquid separator 1, passes through the top pipe and the second valve 9, and then enters the vacuum pump 12 before being discharged. The foam and liquid settle in the gas-liquid separator 1, and the liquid is stored at the bottom of the separator. The foam gradually breaks down and merges into the liquid. When the liquid level in the gas-liquid separator 1 rises to the high threshold of the level gauge 2, such as when the volume of the gas-liquid separator 1 is 2 / 3 full, the level gauge 2 sends a high liquid level signal to the control system. The control system executes the discharge interlocking procedure: first, the second valve 9 and the first valve 8 are closed to cut off the vacuuming passage; then, the air inlet valve 11 and the discharge valve 10 are opened, and external air enters the gas-liquid separator 1, causing the pressure inside the separator to rise to atmospheric pressure. Under the action of gravity and the air pressure difference, the liquid is quickly discharged from the discharge valve 10 and discharged into the recovery pipeline. When the level gauge 2 detects that the liquid level has dropped to a low threshold, such as 1 / 5 of the volume of the gas-liquid separator 0, it sends a low liquid level signal to the control system. The control system then closes the discharge valve 10 and the air inlet valve 11 to complete the discharge.

[0044] When the liquid level in the siphon rises to the set high threshold, such as 2 / 3 of the siphon height, the float drives the built-in magnet 7 to rise and move away from the sensing area of ​​the magnet probe 6. The magnet probe 6 stops sending signals, the control system shuts down the vacuum pump 12, and then closes the first valve 8 and the second valve 9. The system returns to standby mode and waits for the next low liquid level signal to trigger.

[0045] Meanwhile, the high-temperature exhaust gas generated by the operation of the vacuum pump 12 is collected by the directional exhaust hood 13 and transported to the inner tube of the spiral shell-and-tube heat exchanger 15 through the insulation pipe 14; the cold decomposition mother liquor to be transported is divided into a main path and a branch path by the diversion valve group 16. The main path enters the annular heat exchange chamber of the outer tube of the heat exchanger and swirls under the action of the spiral guide fins, fully exchanging heat with the high-temperature exhaust gas of the inner tube, raising the temperature to 25-35℃; the branch path remains in its original cold state, and the mother liquor after exchanging heat with the main path merges at the confluence device 17. The sensor array collects real-time temperature, flow rate, and pressure data at each node. Based on the deviation between the target and actual temperatures, the control system automatically adjusts the flow ratio between the main and branch lines of the diversion valve assembly 16, as well as the opening of the flow regulating valves in each loop of the heat tracing pipeline: when the temperature is too high after heat exchange in the main line, the flow ratio of the branch lines is increased to neutralize and lower the temperature with cold mother liquor; when the temperature reaches the target after heat exchange in the main line, the basic flow rate of the branch lines is maintained to balance the pipeline pressure; when the residual heat is insufficient, the flow ratio of the branch lines is reduced to maximize the utilization of the heat exchanged in the main line. The mixed mother liquor is then output through the manifold and transported via a siphon pipe.

[0046] This application achieves fully automated control of vacuuming, gas-liquid separation, and automatic material discharge through signal linkage between the float level gauge 4, the magnetic probe 6, and each level gauge 2 and the valve. This eliminates the need for manual operation, reducing labor costs and preventing human error. The float level gauge 4 monitors the liquid level changes in the siphon tube in real time, precisely triggering the start and stop of the vacuuming operation to ensure the vacuum level in the siphon tube remains within a stable range, preventing feed interruptions due to insufficient vacuum or equipment damage caused by excessively high vacuum. The gas-liquid separator 1 effectively separates foam and liquid entrained during the vacuuming process, preventing them from entering the vacuum pump 12 and corroding components, extending the service life of the vacuum pump 12 and related pipelines, and reducing equipment maintenance costs. Furthermore, by recovering waste heat from the vacuum pump 12, energy is utilized in a cascade manner, reducing production energy consumption.

[0047] It should be noted that this system can be directly installed on the existing decomposition tank cooling plate siphon feed pipe equipment without requiring major modifications to the original production line. The modification is simple and cost-controllable, and it is suitable for conveying the decomposition mother liquor that is prone to foaming in the production of alumina in non-ferrous metallurgy.

[0048] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although embodiments of the invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the invention and its practical application, so that those skilled in the art, after reading this specification, can make modifications, substitutions, variations, and various choices and changes to the embodiments as needed without departing from the principles and spirit of the invention, provided that such modifications, substitutions, variations, and choices and changes are within the scope of the claims of the invention and are protected by patent law.

Claims

1. An automatic vacuum stabilization system for a decomposition tank cooling plate type siphon feed pipe, characterized in that, It includes an automatic vacuuming mechanism with a siphon tube, a gas-liquid separation and automatic feeding mechanism, and a valve control mechanism. These mechanisms are connected by pipelines and achieve signal linkage. The automatic vacuuming mechanism of the siphon tube includes a float level gauge installed on the top of the siphon tube. The float level gauge is equipped with a guide tube and a built-in magnet, and is also equipped with a magnet probe. The gas-liquid separation and automatic feeding mechanism includes a gas-liquid separator connected in series in the vacuum pipeline. The gas-liquid separator is equipped with a level gauge, a feeding valve at the bottom, and an air inlet valve at the top. The valve control mechanism includes a discharge interlock and a vacuum interlock, and the corresponding operation is achieved by controlling the valve opening and closing sequence.

2. The automatic vacuum stabilization system for a decomposition tank cooling plate siphon feed pipe according to claim 1, characterized in that: The float of the float level gauge rises and falls synchronously with the liquid level in the siphon tube. When the liquid level drops to the set threshold, the built-in magnet moves with the float and triggers the outer magnet probe to start the automatic vacuuming operation.

3. The automatic vacuum stabilization system for a decomposition tank cooling plate siphon feed pipe according to claim 1, characterized in that: The gas-liquid separator is used to separate the foam and liquid entrained during the vacuuming process. The liquid accumulates at the bottom of the separator. When the liquid level reaches a set threshold, an automatic discharge operation is triggered to prevent liquid backflow or overflow.

4. The automatic vacuum stabilization system for a decomposition tank cooling plate siphon feed pipe according to claim 1, characterized in that: The gas-liquid separation and automatic discharge mechanism also includes a first valve and a second valve. The gas-liquid separator is connected to the siphon pipe through the first valve and to the vacuum pump through the second valve. When the gas-liquid separator level gauge triggers a high level signal, the second valve and the first valve are closed in sequence to cut off the vacuuming passage. Then the discharge valve and the air inlet valve are opened to complete the rapid discharge of liquid in the separator through the air pressure difference.

5. The automatic vacuum stabilization system for a decomposition tank cooling plate siphon feed pipe according to claim 4, characterized in that: When the float level gauge triggers a low level signal, the air inlet valve and the discharge valve are closed in sequence to cut off the discharge passage and the air inlet passage. Then the first valve and the second valve are opened, and the vacuum pump is started to perform a vacuuming operation.

6. The automatic vacuum stabilization system for a decomposition tank cooling plate siphon feed pipe according to claim 4, characterized in that: The gas-liquid separator is connected to the top of the siphon tube through a pipeline to form a gas-liquid flow path. The vacuum pump is connected to the gas-liquid separator through the first valve and the second valve to form a vacuum circuit. Each valve is linked to the corresponding liquid level gauge through a signal line to achieve fully automated control.

7. The automatic vacuum stabilization system for a decomposition tank cooling plate siphon feed pipe according to claim 1, characterized in that: The float level gauge is equipped with a guide ring on the outside to limit the rise and fall trajectory of the float.

8. The automatic vacuum stabilization system for the decomposition tank cooling plate siphon feed pipe according to claim 4, characterized in that: The vacuum valve exhaust port is connected to a directional exhaust hood, and a pressure balancing valve is installed on the top of the hood. When the exhaust pressure exceeds 0.1 MPa, the pressure is automatically released. The exhaust hood is connected to an insulated pipe, and the insulated pipe is connected to a spiral sleeve that is connected to a heat exchanger.

9. The automatic vacuum stabilization system for the decomposition tank cooling plate siphon feed pipe according to claim 8, characterized in that: The spiral shell-and-tube heat exchanger is connected to a manifold, and the output end of the manifold is connected to a siphon.

10. The automatic vacuum stabilization system for the decomposition tank cooling plate siphon feed pipe according to claim 9, characterized in that: The cold decomposition mother liquor to be transported is divided into a main path and a branch path by a diversion valve. The main path enters the annular heat exchange chamber of the spiral sleeve heat exchanger, and the branch path is connected to the manifold device.

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