Solvent closed recovery and redistribution device for ABS (acrylonitrile butadiene styrene) copolymerization

Abstract

The utility model discloses an ABS (Acrylonitrile Butadiene Styrene) copolymerization solvent closed recovery and redistribution device which comprises a bottom plate, a separation tank and a dynamic balance tank are arranged on the bottom plate, an ingress pipe and an exhaust pipe are arranged on the separation tank, the exhaust pipe is connected with a vacuum pump, an electric heating rod is arranged in the separation tank, a driving motor is arranged on the separation tank and is connected with a rotating shaft, and the rotating shaft is connected with the dynamic balance tank. Blades are arranged on the surface of the rotating shaft, a pressure balance valve and a gas flow controller are arranged between the separation tank and the dynamic balance tank, a controller is arranged outside the dynamic balance tank, solvent-containing gas is guided into the separation tank, and the temperature and the vacuum degree are controlled in a negative pressure environment, so that the solvent is evaporated and separated from other components; the separated pure solvent is guided into the dynamic balance tank, the liquid level sensor transmits the liquid level information in the dynamic balance tank to the controller in real time, the controller adjusts the pump speed according to the solvent demand quantity of the current production line, supply and demand balance is achieved, and the solvent recovery device has the advantages of being high in practicability and capable of improving the solvent recovery efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of solvent recovery, in particular to a closed recovery and redistribution device for ABS copolymerization solvent. Background Art

[0002] ABS resin is one of the five major synthetic resins. It has excellent impact resistance, heat resistance, low temperature resistance, chemical resistance and electrical properties. It is also easy to process, the product size is stable, and the surface gloss is good. It is easy to paint and color, and can also undergo secondary processing such as surface metal spraying, electroplating, welding, hot pressing and bonding. It is widely used in industrial fields such as machinery, automobiles, electronic appliances, instruments and meters, textiles and construction. It is a very versatile thermoplastic engineering plastic.

[0003] In the production process of ABS resin, various solvents are inevitably used to promote the smooth progress of polymerization reaction or as processing aids. After the production is completed, if these solvents are not recycled, not only will they cause a great waste of resources, but they will also pollute the environment. Therefore, the recycling and reuse of solvents has become an important task in the production process of ABS. In the prior art, a recovery furnace is generally used to recycle resin solvents by evaporation and condensation, but this process is often limited by structural design, and it is difficult to ensure high efficiency and high purity of solvent recovery. Especially when faced with solvents with high boiling points or special properties, the limitations of traditional recovery methods are more obvious, often leading to problems such as low recovery rate, high energy consumption, and complex operation, which seriously affects production efficiency and economic benefits.

[0004] More specifically, existing recycling systems are often too simplistic in design and lack targeted consideration of solvent characteristics, resulting in unnecessary heat loss during the recycling process and incomplete separation of the solvent from other components. In addition, the frequent use of manual operations not only increases labor costs, but may also introduce operational errors, affecting the quality and purity of solvent recovery. In addition, traditional recycling systems lack real-time monitoring and automatic control functions, and cannot flexibly adjust recycling parameters according to production needs, which not only limits the improvement of recycling efficiency, but also increases uncertainty in the production process.

[0005] In view of this, developing a new type of recovery device that can not only improve the efficiency of solvent recovery, but also ensure the high purity of the recovered solvent and adapt to the characteristics of different solvents has become a key technical problem that needs to be solved in the current ABS resin production industry. The utility model comes into being based on such a demand background, and aims to provide a closed recovery and redistribution device for ABS copolymerization solvent with a reasonable structure, simple operation and high recovery efficiency through technological innovation, so as to improve production efficiency while reducing the impact on the environment, and promote the development of ABS resin production in a greener and more sustainable direction. Utility Model Content

[0006] The purpose of the present utility model is to provide a solvent closed recycling and redistribution device for ABS copolymerization to solve the problems raised in the above-mentioned background technology.

[0007] To solve the above technical problems, the present utility model provides the following technical solutions: A solvent closed recycling and redistribution device for ABS copolymerization, including a bottom plate, on the upper surface of which a separation tank and a dynamic balance tank are fixedly connected. One end of an inlet pipe is fixedly connected through the side wall of the separation tank, and the other end of the inlet pipe is connected to the copolymerization reactor of ABS. One end of an air extraction pipe is fixedly connected through the side wall of the separation tank, and the air extraction pipe is connected to a vacuum pump. A plurality of electric heating rods are fixedly connected to the inner side wall of the separation tank. A driving motor is fixedly connected to the upper end surface of the separation tank. The output shaft of the driving motor is fixedly connected to a rotating shaft, and a plurality of blades are fixedly connected to the surface of the rotating shaft, and the rotating shaft penetrates through the upper end surface of the separation tank. A discharge pipe is fixedly connected through the lower end surface of the separation tank, and a valve is provided on the discharge pipe. A connecting pipe is fixedly connected through between the separation tank and the dynamic balance tank, and a pressure balance valve and a gas flow controller are provided on the connecting pipe. A liquid level sensor is fixedly connected to the inner side wall of the dynamic balance tank. The dynamic balance tank is connected to an air extraction pump through an exhaust pipeline. A controller is fixedly connected to the outer side wall of the dynamic balance tank. The vacuum pump, the electric heating rods, the driving motor, the pressure balance valve, the gas flow controller, the liquid level sensor, and the air extraction pump are all electrically connected to the controller.

[0008] According to the above technical solution, observation windows are provided on the side walls of both the separation tank and the dynamic balance tank.

[0009] According to the above technical solution, maintenance openings are provided through the side walls of both the separation tank and the dynamic balance tank.

[0010] According to the above technical solution, a condenser is fixedly connected to the connecting pipe.

[0011] According to the above technical solution, a temperature sensor is fixedly installed on the separation tank, and the temperature sensor is electrically connected to the controller.

[0012] According to the above technical solution, an automatic cleaning system is further provided on the inner side wall of the separation tank (2). The automatic cleaning system includes a plurality of automatic cleaning nozzles, which are connected to an external cleaning agent storage tank and a water storage tank, and are used for automatically cleaning the inner wall of the separation tank (2) regularly. The automatic cleaning system is electrically connected to the controller, and the automatic cleaning cycle and cleaning program are controlled by the controller.

[0013] According to the above technical solution, a multi-stage filter is also connected in series on the connecting pipe. The multi-stage filter includes a pre-filter, and / or a medium-efficiency filter, and / or a high-efficiency filter, which are used to gradually filter out impurities in the material conveyed from the separation tank (2) to the dynamic balance tank.

[0014] According to the above technical solution, the pre-filter

[0015] Pore size range: generally about 50 μm to 100 μm.

[0016] Purpose: To intercept larger particulate matters, such as polymer fragments, dust, etc., to protect the subsequent filters from being damaged by large particulate matters and extend their service life.

[0017] Medium-efficiency filter

[0018] Pore size range: approximately between 1 μm and 10 μm.

[0019] Purpose: To remove medium-sized particles, such as unreacted monomers, small molecule by-products, etc., and further improve the purity.

[0020] High-efficiency filter

[0021] Pore size range: less than 1 μm, usually between 0.1 μm and 0.3 μm.

[0022] Purpose: To capture extremely fine particles, such as low-boiling point organic matters, catalyst residues, etc., to ensure that the recovery meets high-purity standards and is suitable for direct reuse in the production process.

[0023] It should be noted that these pore size ranges are not fixed, but are flexibly adjusted according to specific production conditions, solvent characteristics, impurity types, purity requirements and other factors.

[0024] According to the above technical solution, an emergency discharge system is also provided on the dynamic balance tank, including at least one emergency discharge valve and a pressure sensor. The emergency discharge valve automatically opens when the pressure in the dynamic balance tank exceeds the preset safety threshold. The pressure sensor is used to monitor the real-time pressure in the dynamic balance tank and is electrically connected to the controller to control the opening and closing of the emergency discharge valve to ensure the safety of the equipment operation.

[0025] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows: In the present utility model, a bottom plate is provided, and both the separation tank and the dynamic balance tank are fixed on the bottom plate through the supporting legs below. The inlet pipe is used to connect the separation tank and the reactor, enabling the solvent-containing gas generated by the external copolymerization reaction to enter the separation tank through the inlet pipe. After the vacuum pump is started, the air in the separation tank can be evacuated through the air extraction pipe, thereby achieving the purpose of controlling the vacuum degree in the separation tank. After the electric heating rod is powered on, it can heat the inside of the separation tank, thereby controlling the temperature in the separation tank. After the driving motor is started, the output shaft is used to control the rotation of the rotating shaft. The rotating shaft is rotatably connected to the separation tank in a penetrating manner, and the rotating shaft can drive the blades to rotate in the separation tank, so that the solvent in the separation tank is heated evenly and fully. The staff can discharge the solution in the separation tank from the discharge pipe by opening the valve. The connecting pipe is used to connect the separation tank and the dynamic balance tank, enabling the gas separated in the separation tank to enter the dynamic balance tank. The pressure balance valve and the gas flow controller can ensure the stable pressure in the dynamic balance tank. The air extraction pump can extract and recycle the solvent in the dynamic balance tank. The staff can monitor the solvent demand of the current production line through the controller, thereby controlling the solvent delivery volume supplied to the ABS copolymerization reaction system. By introducing the solvent-containing gas generated by the copolymerization reaction into the separation tank, and then controlling the temperature and vacuum degree in the negative pressure environment, the solvent is quickly evaporated and separated from other components, improving the recovery efficiency. The purified solvent after separation is introduced into the dynamic balance tank through the connecting pipe. The liquid level sensor transmits the liquid level information in the dynamic balance tank to the controller in real time, and the controller then adjusts the pump speed according to the solvent demand of the current production line, thereby achieving the balance between supply and demand and ensuring the safe and stable operation of the solvent recovery and redistribution process.

[0026] The observation window adopted enables the staff to observe the internal conditions of the separation tank and the dynamic balance tank, facilitating the recording of the recovery process.

[0027] The maintenance opening adopted facilitates the staff to perform maintenance on the separation tank and the dynamic balance tank.

[0028] The condenser adopted can accelerate the condensation speed of the purified solvent after separation.

[0029] The temperature sensor adopted can monitor the temperature during the evaporation and separation process in the separation tank in real time, facilitating the staff to accurately control the temperature.

[0030] By accurately controlling the vacuum degree and temperature, combined with an efficient heating system, the energy consumption of solvent recovery is significantly reduced, achieving energy conservation and emission reduction.

[0031] Integrating advanced sensors and controllers, it can monitor and adjust the key parameters in the recovery process in real time, ensuring the high-purity recovery of the solvent.

[0032] An emergency discharge system is added, which can automatically respond to abnormal pressure changes, effectively prevent safety accidents, and ensure the safety of equipment and personnel.

[0033] An automatic cleaning system and an observation window are designed, which simplify the daily maintenance work and improve the reliability and service life of the equipment.

[0034] Through the integrated controller, the intelligent matching of solvent supply and demand is realized, the production process is optimized, and the overall production efficiency is improved.

[0035] Environmentally friendly: reduce solvent emissions, reduce the impact on the environment, and meet the requirements of green production Description of the Drawings

[0036] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0037] Figure 1 is the overall front view structural schematic diagram of the present utility model;

[0038] Figure 2 is the front view structural schematic diagram of the separation tank of the present utility model;

[0039] Figure 3 is the structural schematic diagram of the dynamic balance tank of the present utility model;

[0040] Figure 4 is the structural schematic diagram of the automatic cleaning system of the present utility model;

[0041] Figure 5 is the structural schematic diagram of the multi-stage filter of the present utility model;

[0042] Figure 6 is the structural schematic diagram of the emergency discharge system of the present utility model;

[0043] In the figure: 1 - bottom plate, 2 - separation tank, 3 - dynamic balance tank, 4 - inlet pipe, 5 - suction pipe, 6 - vacuum pump, 7 - electric heating rod, 8 - drive motor, 9 - rotating shaft, 10 - blade, 11 - discharge pipe, 12 - valve, 13 - connecting pipe, 14 - pressure balance valve, 15 - gas flow controller, 16 - liquid level sensor, 17 - air extraction pump, 18 - controller, 19 - observation window, 20 - maintenance door, 21 - condenser, 22 - temperature sensor, 23 - automatic cleaning system, 23a - automatic cleaning nozzle, 23b - cleaning agent storage tank, 23c - water storage tank, 24 - multi-stage filter, 24a - primary filter, 24b - intermediate filter, 24c - high-efficiency filter, 25 - emergency discharge system, 25a - emergency discharge valve, 25b - pressure sensor. Detailed implementation manner

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0045] Please refer to Figures 1-6, the present utility model provides a technical solution: a solvent closed recycling and redistribution device for ABS copolymerization, including a bottom plate 1. The upper surface of the bottom plate 1 is fixedly connected with a separation tank 2 and a dynamic balance tank 3. One end of an inlet pipe 4 is fixedly connected through the side wall of the separation tank 2, and the other end of the inlet pipe 4 is connected to the copolymerization reactor of ABS. One end of an air extraction pipe 5 is fixedly connected through the side wall of the separation tank 2, and the air extraction pipe 5 is connected with a vacuum pump 6. After the vacuum pump 6 is started, air in the separation tank 5 can be evacuated through the air extraction pipe 5, so as to achieve the purpose of controlling the vacuum degree in the separation tank 5. A plurality of electric heating rods 7 are fixedly connected to the inner side wall of the separation tank 2. After the electric heating rods 7 are energized, they can heat the inside of the separation tank 5, so as to control the temperature in the separation tank 5. A driving motor 8 is fixedly connected to the upper end surface of the separation tank 2. The output shaft of the driving motor 8 is fixedly connected with a rotating shaft 9. A plurality of blades 10 are fixedly connected to the surface of the rotating shaft 9, and the rotating shaft 9 penetrates through the upper end surface of the separation tank 2. After the driving motor 8 is started, the rotating shaft 9 is controlled to rotate through the output shaft. The rotating shaft 9 is rotatably connected through the separation tank 2, and the rotating shaft 9 can drive the blades 10 to rotate in the separation tank 2, so that the solvent in the separation tank 2 is heated evenly and fully. A discharge pipe 11 is fixedly connected through the lower end surface of the separation tank 2. A valve 12 is provided on the discharge pipe 11. A connecting pipe 13 is used to connect the separation tank 2 and the dynamic balance tank 3, and a pressure balance valve 14 and a gas flow controller 15 are fixedly connected through the connecting pipe 13. The pressure balance valve 14 and the gas flow controller 15 can ensure the stable pressure in the dynamic balance tank 3. A liquid level sensor 16 is fixedly connected to the inner side wall of the dynamic balance tank 3. The dynamic balance tank 3 is connected with an air extraction pump 17 through an exhaust pipeline. A controller 18 is fixedly connected to the outer side wall of the dynamic balance tank 3. The vacuum pump 6, the electric heating rods 7, the driving motor 8, the pressure balance valve 14, the gas flow controller 15, the liquid level sensor 16 and the air extraction pump 17 are all electrically connected to the controller 18. By introducing the solvent-containing gas generated by the copolymerization reaction into the separation tank 2, and then controlling the temperature and vacuum degree in a negative pressure environment, the solvent can be quickly evaporated and separated from other components, improving the recovery efficiency. The separated pure solvent is introduced into the dynamic balance tank 3 through the connecting pipe 13. The liquid level sensor 16 transmits the liquid level information in the dynamic balance tank 3 to the controller 18 in real time, and the controller 18 adjusts the pump speed according to the current solvent demand of the production line, so as to achieve the supply-demand balance and ensure the safety and stability of the solvent recovery and redistribution process.

[0046] Specifically, observation windows 19 are provided on the side walls of both the separation tank 2 and the dynamic balance tank 3.

[0047] The adopted observation windows 19 can enable the staff to observe the internal conditions of the separation tank 2 and the dynamic balance tank 3, thus facilitating the recording of the recovery process.

[0048] Specifically, inspection openings 20 are provided through the side walls of both the separation tank 2 and the dynamic balance tank 3.

[0049] The adopted inspection openings 20 facilitate the maintenance of the separation tank 2 and the dynamic balance tank 3 by the staff.

[0050] Specifically, a condenser 21 is fixedly connected to the connecting pipe 13.

[0051] The adopted condenser 21 can accelerate the condensation rate of the separated pure solvent.

[0052] Specifically, a temperature sensor 22 is fixedly installed on the separation tank 2, and the temperature sensor 22 is electrically connected to the controller 18.

[0053] The adopted temperature sensor 22 can monitor the temperature during the evaporation and separation process in the separation tank 2 in real time, facilitating the staff to accurately control the temperature.

[0054] Specifically, an automatic cleaning system 23 is further provided on the inner side wall of the separation tank 2. The automatic cleaning system 23 includes a plurality of automatic cleaning nozzles 23a. The automatic cleaning nozzles 23a are connected to an external cleaning agent storage tank 23b and a water storage tank 23c, and are used for periodically and automatically cleaning the inner wall of the separation tank 2. The automatic cleaning system 23 is electrically connected to the controller 18, and the automatic cleaning cycle and cleaning program are controlled by the controller 18.

[0055] Specifically, a multi-stage filter 24 is also connected in series on the connecting pipe 13. The multi-stage filter 24 includes a pre-filter 24a, and / or a medium-efficiency filter 24b, and / or a high-efficiency filter 24c, and is used for gradually filtering impurities in the material conveyed from the separation tank 2 to the dynamic balance tank 3.

[0056] Specifically, the pre-filter

[0057] Aperture range: generally about 50μm to 100μm.

[0058] Purpose: To intercept larger particulate matters, such as polymer fragments, dust, etc., to protect the subsequent filters from damage by large particulate matters and extend their service life.

[0059] Medium-efficiency filter

[0060] Aperture range: approximately between 1μm and 10μm.

[0061] Purpose: To remove medium-sized particles, such as unreacted monomers, small molecule by-products, etc., and further improve the purity.

[0062] High-efficiency filter

[0063] Pore size range: less than 1 μm, usually between 0.1 μm and 0.3 μm.

[0064] Purpose: To capture extremely fine particles such as low-boiling organic substances and catalyst residues, ensuring that the recovery meets high-purity standards and is suitable for direct reuse in the production process.

[0065] It should be noted that these pore size ranges are not fixed, but vary according to specific production conditions. Specifically, an emergency discharge system 25 is also provided on the dynamic balance tank 3, including at least one emergency discharge valve 25a and a pressure sensor 25b. The emergency discharge valve 25a automatically opens when the pressure in the dynamic balance tank 3 exceeds a preset safety threshold. The pressure sensor 25b is used to monitor the real-time pressure in the dynamic balance tank 3 and is electrically connected to the controller 18 to control the opening and closing of the emergency discharge valve 25a, ensuring the safety of the equipment operation.

[0066] Working principle: When in use, the solvent-containing gas generated by the ABS copolymerization reaction enters the separation tank 2 through the inlet pipe 4. A negative pressure environment is formed in the separation tank 2 by the vacuum pump 6. The electric heating rod 7 is powered on, and the drive motor 8 is started, so that the rotating shaft 9 drives the blades 10 to rotate in the separation tank 2, thereby heating the solvent, causing the solvent to evaporate quickly and separate from other components. The evaporated pure solvent vapor enters the connecting pipe 13, and after being condensed by the condenser 21, it is converted into a liquid state and enters the dynamic balance tank 3. The liquid level sensor 16 monitors the liquid level in the dynamic balance tank 3, and the controller 18 then accurately controls the solvent delivery volume to the ABS copolymerization reaction system according to the solvent demand of the current production line, achieving a balance between supply and demand and avoiding production fluctuations caused by overage or shortage.

[0067] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0068] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A closed recovery and redistribution device for ABS copolymerization solvent, comprising a bottom plate (1), characterized in that: The upper surface of the bottom plate (1) is fixedly connected to a separation tank (2) and a dynamic balance tank (3); one end of an introduction pipe (4) is fixedly connected through the side wall of the separation tank (2); the other end of the introduction pipe (4) is connected to an ABS copolymerization reactor; an exhaust pipe (5) is fixedly connected through the side wall of the separation tank (2); the exhaust pipe (5) is connected to a vacuum pump (6); a plurality of electric heating rods (7) are fixedly connected to the inner side wall of the separation tank (2); a driving motor (8) is fixedly connected to the upper end surface of the separation tank (2); the output shaft of the driving motor (8) is fixedly connected to a rotating shaft (9); a plurality of blades (10) are fixedly connected to the surface of the rotating shaft (9); the rotating shaft (9) passes through the upper end surface of the separation tank (2); and the lower end surface of the separation tank (2) passes through the lower end surface of the separation tank (2). A discharge pipe (11) is fixedly connected therethrough, and a valve (12) is provided on the discharge pipe (11); a connecting pipe (13) is fixedly connected and passed through the separation tank (2) and the dynamic balancing tank (3); a pressure balancing valve (14) and a gas flow controller (15) are provided on the connecting pipe (13); a liquid level sensor (16) is fixedly connected to the inner wall of the dynamic balancing tank (3); the dynamic balancing tank (3) is connected to an air pump (17) through an exhaust pipe; a controller (18) is fixedly connected to the outer wall of the dynamic balancing tank (3); and the vacuum pump (6), the electric heating rod (7), the drive motor (8), the pressure balancing valve (14), the gas flow controller (15), the liquid level sensor (16) and the air pump (17) are all electrically connected to the controller (18).

2. The closed recovery and redistribution device for ABS copolymerization solvent according to claim 1, characterized in that: The side walls of the separation tank (2) and the dynamic balance tank (3) are both provided with observation windows (19).

3. The closed recovery and redistribution device for ABS copolymerization solvent according to claim 2, characterized in that: Inspection openings (20) are provided through the side walls of the separation tank (2) and the dynamic balance tank (3).

4. The closed recovery and redistribution device for ABS copolymerization solvent according to claim 3 is characterized in that: The connecting pipe (13) is fixedly connected to a condenser (21).

5. The closed recovery and redistribution device for ABS copolymerization solvent according to claim 4 is characterized in that: A temperature sensor (22) is fixedly mounted on the separation tank (2), and the temperature sensor (22) is electrically connected to the controller (18).

6. The closed recovery and redistribution device for ABS copolymerization solvent according to claim 1, characterized in that: The inner wall of the separation tank (2) is also provided with an automatic cleaning system (23), the automatic cleaning system (23) comprising a plurality of automatic cleaning nozzles (23a), the automatic cleaning nozzles (23a) being connected to an external detergent storage tank (23b) and a water storage tank (23c); the automatic cleaning system (23) is electrically connected to a controller (18).

7. The closed recovery and redistribution device for ABS copolymerization solvent according to claim 1 is characterized in that: The connecting pipe (13) is also connected in series with a multi-stage filter (24).

8. The closed recovery and redistribution device for ABS copolymerization solvent according to claim 7, characterized in that: The multi-stage filter (24) includes a primary filter (24a), and / or a medium filter (24b), and / or a high efficiency filter (24c).

9. The closed recovery and redistribution device for ABS copolymerization solvent according to claim 8, characterized in that: The primary filter is 50 μm to 100 μm; the medium filter is 1 μm to 10 μm; and the high efficiency filter is less than 1 μm.

10. The closed recovery and redistribution device for ABS copolymerization solvent according to claim 1, characterized in that: The dynamic balancing tank (3) is also provided with an emergency discharge system (25), comprising at least one emergency discharge valve (25a) and a pressure sensor (25b). The emergency discharge valve (25a) automatically opens when the pressure in the dynamic balancing tank (3) exceeds a preset safety threshold. The pressure sensor (25b) is used to monitor the real-time pressure in the dynamic balancing tank (3) and is electrically connected to the controller (18).

Images