An oil-water seal system

Abstract

An oil-water seal system comprises a mechanical seal, a mechanical seal liquid circulating system, a booster, a mechanical seal water injection system and a pressure balance system. The mechanical seal liquid circulating system comprises a seal liquid circulating mechanism, and the booster is connected to the seal liquid circulating mechanism. The mechanical seal water injection system comprises a water pressure module connected to the booster and transmitting water into the booster. The pressure balance system comprises an oil pressure module and an oil pressure adjusting control module. When the mechanical seal works, the oil pressure adjusting control module is used to collect the pressure in the reactor and transmit the pressure to the oil pressure module, and the oil pressure module adjusts the pressure of the oil pressure transmitted into the booster, so that the pressure of the pressure balance system changes with the pressure in the reactor. The oil-water seal system can adaptively adjust the pressure of the booster on the mechanical seal, stabilize the booster effect on the mechanical seal, and achieve good seal effect.

Description

Technical Field

[0001] This utility model belongs to the technical field of mechanical seal auxiliary systems, and in particular to an oil-water sealing system. Background Technology

[0002] A reaction vessel is a widely used piece of equipment in chemical, pharmaceutical, and food industries for chemical reactions, mixing, dissolving, and other processes. Mechanical seals are a crucial technology in the operation of reaction vessels, effectively preventing leakage and ensuring the safety and stability of the production process. A mechanical seal is a technology that uses mechanical means to seal the gap between two relatively moving parts, preventing leakage. In a reaction vessel, a mechanical seal typically consists of two main parts: a static seal and a dynamic seal. The static seal usually consists of components such as a sealing seat, sealing ring, and sealing gasket, which are installed in fixed positions on the reaction vessel and do not change with its movement. The dynamic seal consists of components such as a sealing ring, sealing gasket, and sealing pad, which are installed on rotating parts of the reaction vessel and rotate accordingly with its movement.

[0003] For a mechanical seal in a reactor to achieve a proper seal, the sealing cavity must contain a stable, appropriately heated sealing fluid at a pressure approximately 0.1–0.2 MPa higher than the pressure of the sealed space within the reactor. This sealing fluid ensures a clean film between the moving and stationary rings (friction pairs) of the double-end mechanical seal, preventing direct contact friction, reducing the friction coefficient, minimizing frictional heat, and extending the lifespan of the double-end mechanical seal. It's crucial that the sealing fluid pressure is stable and approximately 0.1–0.2 MPa higher than the pressure of the sealed space. However, during operation, the internal pressure of the reactor fluctuates throughout the process. Current pressurization equipment provides a fixed pressure within the seal, making it impossible to guarantee a pressure higher than the pressure of the sealed space. This insufficient pressure in the sealing cavity leads to inadequate sealing performance, premature seal wear, and media leakage. Summary of the Invention

[0004] In view of this, the present invention provides an oil-water sealing system with adaptively adjustable mechanical seal pressure to meet industrial needs.

[0005] An oil-water sealing system includes a mechanical seal connected to a reactor, a mechanical seal fluid circulation system connected to the mechanical seal, a booster connected to the mechanical seal fluid circulation system, a mechanical seal water injection system connected to the booster, and a pressure balancing system connected to the booster. The mechanical seal fluid circulation system includes a sealing fluid circulation mechanism connected to the mechanical seal, and the booster is connected to the sealing fluid circulation mechanism to transfer the sealing fluid medium within the booster to the sealing fluid circulation mechanism. The mechanical seal water injection system includes a water pressure module connected to the booster and transferring water to the booster. The pressure balancing system includes a hydraulic module connected to the booster and an hydraulic pressure regulating and control module connected between the mechanical seal and the hydraulic module. When the mechanical seal is working, the oil pressure regulation and control module is used to collect the pressure inside the reactor and transmit the pressure to the oil pressure module. The oil pressure module regulates the pressure transmitted to the booster, so that the pressure of the pressure balance system changes with the pressure inside the reactor.

[0006] Furthermore, the oil-water sealing system also includes a level transmitter installed on the booster. When the level transmitter reports a low level, the water pressure module is activated, and the level transmitter controls the output of the water pressure module in real time to achieve automatic replenishment of the booster while avoiding over-rushing during replenishment. When the level transmitter reports a high level, the water pressure module stops replenishing, and the automatic replenishment is completed.

[0007] Furthermore, the mechanical sealing liquid circulation system also includes a heat exchange device disposed on the sealing liquid circulation mechanism.

[0008] Furthermore, the oil pressure regulation control module uses the difference between the sealing liquid pressure of the booster and the pressure of the reactor as a control signal. When the difference between the sealing liquid pressure of the booster and the pressure of the reactor is ≤0.1 MPa, the oil pressure regulation control module controls the oil pressure module to make adjustments.

[0009] Furthermore, the oil pressure in the pressure balancing system is the same as the pressure inside the reactor.

[0010] Furthermore, the mechanical seal water injection system also includes a flushing module connected to the mechanical seal.

[0011] Furthermore, the booster includes an oil pressure chamber connected to the pressure balancing system and a hydraulic chamber connected to the mechanical seal water injection system.

[0012] Furthermore, the water pressure module simultaneously detects the sealing liquid pressure transmitted to the booster during the replenishment process. When the water pressure module replenishes the booster and the replenishment pressure of the water pressure module is high, the water pressure module stops replenishing the liquid.

[0013] Compared with existing technologies, the oil-water sealing system provided by this utility model converts the pressure between the mechanical seal water injection system and the pressure balancing system through a booster. The oil pressure regulating control module in the pressure balancing system collects the internal pressure of the reactor and regulates the oil pressure output from the oil pressure module to the booster. When the mechanical seal is working on the reactor, the oil pressure regulating control module collects the pressure inside the reactor and transmits it to the oil pressure module. The oil pressure module regulates the pressure of the oil transmitted to the booster, causing the pressure of the oil pressure module to change with the pressure inside the reactor. This, in turn, causes the pressurized liquid transmitted from the booster to the mechanical seal fluid circulation system to change synchronously, thereby achieving synchronous pressure regulation of the mechanical seal. This oil-water sealing system can adaptively adjust the pressure of the booster on the mechanical seal, ensuring that the sealing cavity of the mechanical seal has a higher pressure than the sealed space in the reactor, achieving a good mechanical seal effect. Attached Figure Description

[0014] Figure 1 A schematic diagram of the flow structure of the oil-water sealing system provided by this utility model. Detailed Implementation

[0015] The specific embodiments of this utility model are described in further detail below. It should be understood that the description of the embodiments of this utility model herein is not intended to limit the scope of protection of this utility model.

[0016] like Figure 1 The diagram shown is a structural schematic of the oil-water sealing system provided by this utility model. The oil-water sealing system includes a mechanical seal 2 connected to the reactor 1, a mechanical seal fluid circulation system 10 connected to the mechanical seal 2, a booster 20 connected to the mechanical seal fluid circulation system 10, a mechanical seal water injection system 30 connected to the booster 20, a pressure balancing system 40 connected to the booster 20, and a level transmitter 50 mounted on the booster 20. The oil-water sealing system also includes other functional modules, such as assembly components, etc., which are technologies known to those skilled in the art and will not be described in detail here.

[0017] The mechanical seal 2 is provided with a pressurization chamber and a flushing chamber to achieve pressurization and cleaning of the mechanical seal. For example, Chinese patent CN202120885740.3 describes a mechanical seal structure with controllable end-face deformation. This structure has a pressurization hole (one inlet and one outlet), a flushing hole, and a pressurization chamber in the stationary ring seat. An auxiliary system is located on the atmospheric side of the stationary ring seat and connected to the pressurization hole. The auxiliary system ensures that the pressure in the sealing chamber is higher than the medium pressure, reducing medium leakage. Simultaneously, the auxiliary fluid, after heat exchange through the auxiliary system, cools the stationary ring during its circulation. It can be seen that the mechanical seal 2 is prior art and will not be described in detail here.

[0018] The mechanical seal fluid circulation system 10 includes a sealing fluid circulation mechanism 11 connected to the mechanical seal 2, and a heat exchange device 12 disposed on the sealing fluid circulation mechanism 11.

[0019] The sealing liquid circulation mechanism 11 injects the pressurized liquid in the booster 1 into the sealing liquid inlet (not shown) of the mechanical seal 2, thereby realizing the circulating pressurization of the sealing cavity of the mechanical seal 2, preventing the leakage of the medium in the reactor 1, and the sealing liquid outlet (not shown) of the mechanical seal 2 returns the pressurized liquid to the sealing liquid circulation mechanism 11, realizing the recycling of the pressurized liquid. The sealing liquid circulation mechanism 11 is a prior art and will not be described in detail here.

[0020] The heat exchange device 12 is disposed on one side of the sealing liquid circulation mechanism 11. During the circulation process within the sealing liquid circulation mechanism 11, the liquid also flows towards the heat exchange device 12 for cooling. In this embodiment, the heat exchange device 12 surrounds the outside of the sealing liquid circulation mechanism 11. The heat exchange device 12 injects a cooling medium to cool the sealing liquid circulation mechanism 11, preventing the temperature of the heat exchange device 12 and the pressurized liquid in the booster 20 from becoming too high, which could affect the sealing effect or even the service life of the booster 20 and the sealing liquid circulation mechanism 11.

[0021] The booster 20 includes an oil pressure chamber (not shown) connected to the pressure balancing system 40 and a hydraulic chamber (not shown) connected to the mechanical seal water injection system 30. The pressure balancing system 40 transmits oil to the oil pressure chamber 21, and the oil pressure module 41 in the pressure balancing system 40 transmits the oil pressure to the booster 20. The booster 20 amplifies the oil pressure according to a set setting and transmits it to the water in the hydraulic chamber 22, thereby pressurizing the water in the hydraulic chamber 22. It is also evident that the pressurizing liquid injected into the sealing fluid circulation mechanism 11 is water. Since the pressurizing liquid inevitably leaks during the pressurization process of the sealing fluid circulation mechanism 11, it continuously consumes the pressurizing liquid. In this embodiment, the pressurizing liquid injected into the mechanical seal fluid circulation system 10 is water, saving costs.

[0022] The mechanical seal water injection system 30 includes a water pressure module 31 connected to the booster 20 and transmitting water to the booster 20, and a flushing unit 32 connected to the water tank 1 and the mechanical seal 2.

[0023] The water pressure module 31 transmits water to the hydraulic chamber within the booster 20, and the booster 20 transmits the oil pressure from the pressure balancing system 40 to the hydraulic chamber according to set parameters, thus pressurizing the water in the hydraulic chamber and transmitting it to the sealing fluid circulation mechanism 11. The water in the hydraulic chamber is the pressurized liquid. During the replenishment of the booster 20, the water pressure module 31 simultaneously detects the sealing fluid pressure transmitted to the booster 20. When the water pressure module 31 replenishes the booster 20 and the replenishment pressure of the water pressure module 20 is high, the water pressure module 31 stops replenishing the liquid to prevent the sealing fluid entering the booster 20 from damaging the booster 20. The flushing unit 32 is directly connected to the mechanical seal 2. The flushing unit 32 injects water into the cleaning chamber inside the mechanical seal 2 to prevent the medium in the reactor 1 from entering the mechanical seal 2.

[0024] The pressure balancing system 40 includes a hydraulic module 41 connected to the booster 20 and a hydraulic pressure regulating and control module 42 connected to the hydraulic module 41.

[0025] The hydraulic module 41 transmits oil to the hydraulic chamber 21 of the booster 20. The hydraulic module 41 is a prior art and will not be described in detail here.

[0026] A pressure detection device (not shown) is installed inside the reactor 1. This device collects the pressure inside the reactor 1 and transmits it in real time to the oil pressure regulating and control module 42. The oil pressure regulating and control module 42 then regulates and controls the oil pressure output by the oil pressure module 41 to the booster 20. When the mechanical seal 2 is working on the reactor 1, the oil pressure regulating and control module 42 collects the pressure inside the reactor 1 and transmits it to the oil pressure module 41. The oil pressure module 41 regulates the oil pressure transmitted to the booster 20, so that the pressure of the oil pressure module 41 changes with the pressure inside the reactor 1. In this embodiment, the oil pressure of the pressure balancing system 41 is the same as the pressure inside the reactor 1, and the booster 20 amplifies the oil pressure and transmits it to the hydraulic chamber.

[0027] Furthermore, the oil pressure regulation and control module 42 uses the difference between the sealing liquid pressure of the booster 20 and the pressure of the reactor as the control signal of the oil pressure regulation and control module 42. When the difference between the sealing liquid pressure of the booster 20 and the pressure of the reactor is ≤0.1 MPa, the oil pressure regulation and control module 42 controls the oil pressure module 41 to make adjustments.

[0028] The level transmitter 50 is used to measure and transmit the volume, height, and weight of the pressurized liquid in the booster 20. The level transmitter 50 is a prior art technology. During use, when the level transmitter 50 reports a low level, the water pressure module 31 is activated, and the level transmitter 50 controls the output of the water pressure module 31 in real time to achieve automatic liquid replenishment of the booster 20 while avoiding over-current during replenishment. When the level transmitter 50 reports a high level, the water pressure module 31 stops, and the automatic liquid replenishment is completed.

[0029] Compared with the prior art, the oil-water sealing system provided by this utility model uses the booster 20 to convert the pressure between the mechanical seal water injection system 30 and the pressure balancing system 40. The oil pressure regulation and control module 42 in the pressure balancing system 40 collects the internal pressure of the reactor 1 and regulates the oil pressure output by the oil pressure module 41 to the booster 20. When the mechanical seal 2 is working on the reactor 1, the oil pressure regulation and control module 42 collects the pressure inside the reactor 1 and transmits this pressure to the oil pressure module 41. The oil pressure module 41 regulates the pressure of the oil transmitted to the booster 20, so that the pressure of the oil pressure module 41 changes with the pressure inside the reactor 1. This causes the pressurized liquid transmitted from the booster 20 to the mechanical seal fluid circulation system 10 to change synchronously, thereby achieving synchronous pressure regulation of the mechanical seal 1. The oil-water sealing system can adaptively adjust the pressure of the booster on the mechanical seal 2, ensuring that the sealing cavity of the mechanical seal has a higher pressure than the sealed space in the reactor, thus achieving a good mechanical sealing effect.

[0030] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Any modifications, equivalent substitutions or improvements within the spirit of the present utility model are covered within the scope of the claims of the present utility model.

Claims

1. An oil-water sealing system, comprising a mechanical seal connected to a reaction vessel, characterized in that: The oil-water sealing system includes a mechanical seal fluid circulation system connected to the mechanical seal, a booster connected to the mechanical seal fluid circulation system, a mechanical seal water injection system connected to the booster, and a pressure balancing system connected to the booster. The mechanical seal fluid circulation system includes a sealing fluid circulation mechanism connected to the mechanical seal. The booster is connected to the sealing fluid circulation mechanism to transfer the sealing fluid medium in the booster to the sealing fluid circulation mechanism. The mechanical seal water injection system includes a water pressure module connected to the booster and transferring water to the booster. The pressure balancing system includes an oil pressure module connected to the booster and an oil pressure regulating and control module connected between the mechanical seal and the oil pressure module. When the mechanical seal is working, the oil pressure regulating and control module is used to collect the pressure inside the reactor and transmit the pressure to the oil pressure module. The oil pressure module regulates the pressure of the oil pressure transmitted to the booster, so that the pressure of the pressure balancing system changes with the pressure inside the reactor.

2. The oil-water sealing system as described in claim 1, characterized in that: The oil-water sealing system also includes a level transmitter installed on the booster. When the level transmitter reports a low level, the water pressure module is activated, and the level transmitter controls the output of the water pressure module in real time to achieve automatic replenishment of the booster while avoiding over-rushing during replenishment. When the level transmitter reports a high level, the water pressure module stops replenishing, and the automatic replenishment is completed.

3. The oil-water sealing system as described in claim 1, characterized in that: The mechanical sealing liquid circulation system also includes a heat exchange device disposed on the sealing liquid circulation mechanism.

4. The oil-water sealing system as described in claim 1, characterized in that: The oil pressure regulation and control module uses the difference between the sealing liquid pressure of the booster and the pressure of the reactor as the control signal of the oil pressure regulation and control module. When the difference between the sealing liquid pressure of the booster and the pressure of the reactor is ≤0.1 MPa, the oil pressure regulation and control module controls the oil pressure module to make adjustments.

5. The oil-water sealing system as described in claim 1, characterized in that: The oil pressure in the pressure balancing system is the same as the pressure inside the reactor.

6. The oil-water sealing system as described in claim 1, characterized in that: The mechanical seal water injection system also includes a flushing module connected to the mechanical seal.

7. The oil-water sealing system according to claim 1, characterized in that: The booster includes an oil pressure chamber connected to the pressure balancing system and a hydraulic chamber connected to the mechanical seal water injection system.

8. The oil-water sealing system according to claim 1, characterized in that: During the replenishment of the booster, the water pressure module simultaneously detects the sealing liquid pressure transmitted to the booster. When the water pressure module replenishes the booster and the replenishment pressure of the water pressure module is high, the water pressure module stops replenishing the liquid.

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