A plunger type anti-blocking material discharge valve, a material discharge system and a method

Abstract

The application provides a plunger type anti-blocking blowdown valve, a blowdown system and a method, relates to the technical field of a reaction kettle blowdown valve, and comprises a blowdown main pipe, a plunger and a blowdown branch pipe; the plunger is provided with a top sealing ring and a bottom sealing ring, two groups of sealing rings are arranged to better block polybutylene from leaking out from between the plunger and the inner wall of the blowdown main pipe, and the defect that a conventional pneumatic plunger blowdown valve is prone to internal leakage is solved; the minimum distance between the top sealing ring and the bottom sealing ring is greater than the distance from the top of the blowdown port to the bottom of the discharge port, that is, when the plunger closes the blowdown port of the reaction kettle, the space between the top sealing ring and the bottom sealing ring is communicated with the blowdown branch pipe, so that the polybutylene remaining in the blowdown valve can be discharged in time; and the plunger protrudes from the bottom surface of the reaction kettle when the blowdown port is closed, so that the polybutylene at the plunger can be disturbed by the stirring equipment of the reaction kettle, and the problem that the plunger and the bottom surface of the reaction kettle have a gap in conventional technologies, so that the polybutylene is caked in the gap, is avoided.

Description

Technical Field

[0001] This invention relates to the field of reactor discharge valve technology, and in particular to a plunger-type anti-clogging discharge valve, discharge system and method. Background Technology

[0002] The statements herein are provided only as background information in connection with this application and do not necessarily constitute prior art.

[0003] The small bulk polybutene-1 product series has a wide range of applications and is of great value in pipeline manufacturing, film and sheet manufacturing and other fields. In the production process of small bulk polybutene-1 products, the fully reacted small bulk polybutene needs to be transported from the reactor to the flash reactor. In order to facilitate the discharge, there is a pneumatic plunger discharge valve at the bottom of the reactor. The pneumatic plunger discharge valve is equipped with a plunger that can slide along the valve wall. By sliding the plunger, the discharge port of the reactor can be blocked or opened, so as to achieve rapid and controllable discharge.

[0004] The inventors discovered that the currently used pneumatic plunger discharge valve often experiences internal leakage when opened, causing the leaked polybutene to contaminate the production site. Furthermore, the polybutene leaking from the reactor also remains inside the discharge valve. When the polybutene clumps inside the discharge valve, it severely affects the normal operation of the plunger, requiring the discharge valve to be disassembled for cleaning, thus delaying production. There is a certain gap between the top of the plunger and the bottom of the reactor. Because the agitator built into the reactor cannot contact the polybutene in the gap, the polybutene clumps inside the gap and blocks the reactor's discharge port, which can easily lead to a catastrophic explosion inside the reactor. Summary of the Invention

[0005] The purpose of this application is to address the deficiencies of the existing technology by proposing a plunger-type anti-clogging discharge valve, discharge system and method, which avoids internal leakage of the discharge valve, prevents the polybutene leaking from the reactor from agglomerating inside the discharge valve, and avoids the agglomerated polybutene from clogging the discharge port.

[0006] The primary objective of this application is to provide a plunger-type anti-clogging discharge valve. One or more embodiments of this application provide the following technical solutions:

[0007] A plunger-type anti-clogging discharge valve includes a discharge main pipe, a plunger, and a discharge branch pipe;

[0008] The discharge main pipe is a cylindrical pipe with one end connected to the discharge port of the reactor. The end of the discharge main pipe away from the reactor is provided with an end plate, and a discharge port is opened on the side wall of the discharge main pipe. The plunger is a cylindrical block, which is engaged with the inner wall of the discharge main pipe and forms a sliding connection with the discharge main pipe.

[0009] The plunger is provided with a top sealing ring and a bottom sealing ring, which correspond one-to-one with the two ends of the plunger. The minimum distance between the top sealing ring and the bottom sealing ring is less than the distance between the bottom of the discharge port and the top of the end plate.

[0010] One end of the discharge branch pipe is connected to the discharge port, and the other end is connected to the flash evaporator through the discharge pipe.

[0011] Furthermore, the minimum distance between the top sealing ring and the bottom sealing ring is greater than the distance from the top of the discharge port to the bottom of the outlet.

[0012] Furthermore, the end plate is an end plate with a through hole; the through hole is located at the geometric center of the end plate and is opened along the direction of the central axis of the end plate.

[0013] Furthermore, it also includes a connecting rod, which passes through a through hole in the end plate and is connected to the bottom of the plunger; the connecting rod is used to push the plunger to slide along the length of the discharge main pipe.

[0014] Furthermore, the connecting rod includes a limiting block, which is installed at the end of the connecting rod away from the plunger and is used to lock the displacement of the plunger toward the reactor. When the limiting block abuts against the end plate, the plunger passes through the discharge port of the reactor and protrudes from the bottom surface of the reactor.

[0015] Furthermore, when the limiting block abuts against the end plate, the upper surface of the top sealing ring is flush with the bottom surface of the reactor.

[0016] Furthermore, the angle between the direction of the discharge branch pipe and the axis of the discharge main pipe is 45°.

[0017] Furthermore, multiple top sealing rings are spaced apart and arranged in parallel; multiple bottom sealing rings are spaced apart and arranged in parallel.

[0018] The second objective of this application is to provide an anti-clogging discharge system, including the plunger-type anti-clogging discharge valve, and also including a reaction vessel and a flash evaporator; the discharge branch pipe is connected to the flash evaporator through the discharge pipe, and a discharge valve is provided between the discharge branch pipe and the discharge pipe.

[0019] The third objective of this application is to provide a material discharge method for the aforementioned anti-blocking discharge system, comprising the following steps:

[0020] 1) Fully open the discharge valve, and then fully open the plunger-type anti-blockage discharge valve;

[0021] 2) After the plunger-type anti-blockage discharge valve is fully open for 3 seconds, the discharge valve closes, and the plunger-type anti-blockage discharge valve remains fully open. The staff checks for any internal leakage.

[0022] 3) After the inspection is completed, the discharge valve is fully opened, and then closed for 1 minute after the discharge valve has been open for 5 seconds;

[0023] 4) The discharge valve is fully opened again, and then closed for 1 minute after being open for 5 seconds;

[0024] 5) Repeat the opening and closing process of the discharge valve in step 4. Stop step 4 when the current in the polymerization reactor drops to the idling current.

[0025] 6) Close the plunger-type anti-blockage discharge valve, and close the discharge valve 5 seconds later.

[0026] Beneficial effects of the invention

[0027] 1. Considering the internal leakage problem of conventional pneumatic plunger discharge valves, this application provides a top sealing ring and a bottom sealing ring for the plunger, and multiple top and bottom sealing rings are provided. By setting two sets of sealing rings, polybutene is better prevented from leaking out between the plunger and the inner wall of the discharge main pipe, thus solving the defect of easy internal leakage of conventional pneumatic plunger discharge valves.

[0028] Furthermore, the minimum distance between the two sets of sealing rings in this application is less than the distance between the bottom of the discharge port and the top of the end plate, ensuring that both sets of sealing rings can achieve a sealing effect when discharging material, so as to better prevent polybutene from leaking out through the end plate through hole;

[0029] 2. Considering that polybutene may remain between the top and bottom sealing rings, and that polybutene agglomeration can affect the plunger movement; the minimum distance between the top and bottom sealing rings in this application is greater than the distance from the top of the discharge port to the bottom of the outlet. That is, when the plunger closes the discharge port of the reactor, the space between the top and bottom sealing rings is connected to the discharge branch pipe, so that the polybutene remaining inside the discharge valve can be discharged in time, thus solving the problem of polybutene agglomeration in conventional discharge valves affecting the operation of the plunger.

[0030] Furthermore, the minimum distance between the two sets of sealing rings is greater than the distance from the top of the discharge port to the bottom of the outlet port, so that the bottom sealing ring is always between the bottom of the discharge port and the top of the end plate, which always has the effect of sealing the end plate opening, further preventing polybutene from leaking out through the end plate through hole.

[0031] 3. The plunger described in this application protrudes from the bottom surface of the reactor when sealing the discharge port, so that the polybutene at the plunger can be disturbed by the reactor stirring equipment, preventing agglomeration at the plunger and avoiding the problem of polybutene agglomeration in the gap between the plunger and the bottom surface of the reactor in conventional technology. Attached Figure Description

[0032] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0033] Figure 1This is a schematic diagram of the structure of the plunger-type anti-blockage discharge valve when the discharge port is blocked in Embodiment 1 of this application;

[0034] Figure 2 This is a schematic diagram of the structure of the plunger-type anti-blockage discharge valve in Embodiment 1 of this application when the discharge port is open;

[0035] Figure 3 This is a schematic diagram of the piston-type anti-blockage discharge valve in the movement process of Embodiment 1 of this application;

[0036] Figure 4 This is a schematic diagram of the anti-blocking material discharge system in Embodiment 2 of this application;

[0037] The components are as follows: 1. Main discharge pipe; 2. Plunger; 3. Branch discharge pipe; 4. Discharge port; 5. End plate; 6. Discharge port; 7. Through hole; 8. Top sealing ring; 9. Bottom sealing ring; 10. Connecting rod; 11. Limiting block; 12. Reactor; 13. Flash evaporator; 14. Discharge pipe; 15. Discharge valve. Detailed Implementation

[0038] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0039] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0040] To enable those skilled in the art to better understand the technical solution of this application, the technical solution of this application will be described in detail below with reference to specific embodiments.

[0041] As described in the background section, conventional plunger discharge valves are prone to internal leakage. The leaked polybutene remaining in the discharge valve can cause agglomeration and blockage. Furthermore, the agglomeration of polybutene in the gap can block the feed port of the reactor, which can easily lead to a polymerization explosion inside the reactor. This application proposes a plunger-type anti-blockage discharge valve, discharge system, and method.

[0042] Example 1

[0043] One typical implementation of this application is as follows: Figure 1-3 As shown, a plunger-type anti-clogging discharge valve is provided.

[0044] refer to Figure 1-3This embodiment proposes a plunger-type anti-clogging discharge valve, including a discharge main pipe 1, a plunger 2, and a discharge branch pipe 3; the discharge main pipe 1 is a cylindrical pipe with one end connected to the discharge port 4 of the reactor 12, and an end plate 5 is provided at the end of the discharge main pipe 1 away from the reactor 12, and a discharge port 6 is opened on the side wall of the discharge main pipe 1; the end plate 5 is provided with a through hole 7, which is located at the geometric center of the end plate 5 and is opened along the direction of the central axis of the end plate 5;

[0045] The plunger 2 is a cylindrical block that abuts against the inner wall of the discharge pipe 1 and forms a sliding connection with the discharge pipe 1. The plunger 2 is provided with a top sealing ring 8 and a bottom sealing ring 9, which correspond one-to-one with the two ends of the plunger 2. To improve the sealing effect, multiple top sealing rings 8 are provided at intervals and are arranged in parallel. Multiple bottom sealing rings 9 are provided at intervals and are arranged in parallel.

[0046] One end of the discharge branch pipe 3 is connected to the discharge port 6, and the other end is connected to the flash evaporator 13 through the discharge pipe 14. In this embodiment, the angle between the setting direction of the discharge branch pipe 3 and the axis of the discharge main pipe 1 is preferably 45°. The discharge rate is improved by arranging the discharge branch pipe 3 at an angle.

[0047] In other embodiments, a vibration device can be added to the discharge branch pipe 3 to make the polybutene in the discharge valve flow out more easily along the discharge branch pipe 3 under vibration.

[0048] It is understood that in this embodiment, the circular surface of the plunger 2 facing the reactor 12 is called the top, and the top sealing ring 8 is the sealing ring located at the top of the plunger 2, used to directly seal the discharge port; the circular surface away from the reactor 12 is called the bottom, and the bottom sealing ring 9 is the sealing ring located at the bottom of the plunger 2, used to prevent polybutene from leaking out of the through hole 7 of the end plate 5; the top of the end plate 5 refers to the circular surface of the end plate 5 facing the plunger 2, and the bottom of the end plate 5 refers to the circular surface of the end plate 5 away from the plunger 2; the bottom of the discharge port 6 refers to the end of the discharge port 6 closest to the end plate 5, and the top of the discharge port 6 refers to the end of the discharge port 6 farthest from the end plate 5.

[0049] Specifically, in order to make the plunger 2 slide to open and close the discharge port of the reactor 12, this embodiment also includes a connecting rod 10. The connecting rod 10 passes through the through hole 7 opened in the end plate 5 and is connected to the bottom of the plunger 2. The connecting rod 10 is used to push the plunger 2 to slide along the length direction of the discharge main pipe 1. The end of the connecting rod 10 away from the plunger 2 can be connected to a power source such as an air pump, so that the power source can provide the connecting rod 10 with the power to drive the plunger 2 to reciprocate.

[0050] The internal leakage of the conventional pneumatic plunger 2 discharge valve is mainly due to poor adhesion between the sealing ring and the inner wall of the discharge valve, causing polybutene to leak into the discharge valve. Furthermore, the seal between the inner wall of the through hole 7 on the end plate 5 and the connecting rod 10 is poor. In addition, the compression of the end plate 5 by the plunger 2 when the discharge port is opened causes polybutene to leak out through the through hole 7, resulting in the internal leakage problem of the discharge valve. To address this, this embodiment provides a top sealing ring 8 and a bottom sealing ring 9 for the plunger 2, with multiple top and bottom sealing rings 8 and 9. By setting two sets of sealing rings, polybutene is better prevented from leaking out between the plunger 2 and the inner wall of the discharge main pipe 1, thus solving the defect of easy internal leakage in the conventional pneumatic plunger 2 discharge valve.

[0051] Further reference Figure 3 In this embodiment, the minimum distance between the two sets of sealing rings is less than the distance between the bottom of the outlet 6 and the top of the end plate 5, ensuring that both sets of sealing rings can achieve a sealing effect when discharging, so as to better prevent polybutene from leaking out through the through hole 7 of the end plate 5 when discharging.

[0052] Considering that polybutene will solidify after leaking into the discharge valve and affect the sliding of the plunger 2, this embodiment is provided with a top sealing ring 8 and a bottom sealing ring 9. These two sets of sealing rings can not only effectively prevent leakage inside the discharge valve, but also collect the polybutene that leaks into the discharge valve, and work with the discharge branch pipe 3 to discharge the polybutene that leaks into the discharge valve.

[0053] Specifically, the reason for polybutene leakage into the discharge valve is that the sealing ring is not tight, allowing polybutene to enter between the plunger 2 and the end plate 5. Other reasons include... Figure 3 As shown, during the opening of plunger 2, polybutene may enter between plunger 2 and end plate 5 from the branch pipe side; however, this embodiment is equipped with two sets of sealing rings to collect the polybutene that originally leaked into the space between plunger 2 and end plate 5 between the two sets of sealing rings; when plunger 2 closes the discharge port, the space between the two sets of sealing rings is connected to the discharge branch pipe 3, allowing the polybutene that leaked into the discharge valve to be discharged.

[0054] Considering that the top sealing ring may rub against the lower edge of the outlet during the downward movement of the plunger, a bevel is formed at the lower edge of the outlet. The bevel can guide the sealing ring and tighten it towards the plunger. Of course, the maximum distance between the bevel and the plunger is equal to the width of the sealing ring when it is not under force, so that the sealing ring only contacts the side wall of the bevel and is not damaged by the top of the bevel, and ensures that polybutene does not accumulate at the top of the bevel.

[0055] Furthermore, when the discharge port is blocked, the upper surface of the bottom sealing ring 9 is flush with the bottom of the discharge port 6 to prevent polybutene residue from remaining between the bottom of the discharge port 6 and the bottom sealing ring 9.

[0056] To lock the position of the connecting rod 10 and prevent the connecting rod 10 from excessively pushing the plunger 2, which would cause the top sealing ring 8 to fail to seal the discharge port, the connecting rod 10 includes a limiting block 11. The limiting block 11 is installed at the end of the connecting rod 10 away from the plunger 2 and is used to lock the displacement of the plunger 2 toward the reactor 12. When the limiting block 11 abuts against the end plate 5, the plunger 2 passes through the discharge port of the reactor 12 and protrudes from the bottom surface of the reactor 12.

[0057] In this embodiment, the plunger 2 protrudes from the bottom surface of the reactor 12 when sealing the discharge port 6, so that the polybutene at the plunger 2 can be disturbed by the stirring equipment of the reactor 12, preventing it from clumping at the plunger 2 and avoiding the problem of polybutene clumping in the gap between the plunger 2 and the bottom surface of the reactor 12 in conventional technology.

[0058] Example 2

[0059] like Figure 4 As shown, this embodiment provides an anti-blocking discharge system, including the plunger-type anti-blocking discharge valve, as well as a reaction vessel 12 and a flash evaporator 13; the discharge branch pipe 3 is connected to the flash evaporator 13 through the discharge pipe 14, and a discharge valve 15 is provided between the discharge branch pipe 3 and the discharge pipe 14.

[0060] Specifically, the discharge valve 15 is a high-hardness ball valve.

[0061] Example 3

[0062] This embodiment provides a material discharge method for the anti-blocking material discharge system, including the following steps:

[0063] 1) Fully open the discharge valve 15, and then fully open the plunger-type anti-blockage discharge valve;

[0064] 2) After the plunger-type anti-blockage discharge valve is fully open for 3 seconds, the discharge valve 15 is closed, and the plunger-type anti-blockage discharge valve remains fully open. The staff checks for any internal leakage.

[0065] 3) After the inspection is completed, the discharge valve 15 is fully opened, and then closed for 1 minute after the discharge valve 15 has been open for 5 seconds.

[0066] 4) The discharge valve 15 is fully opened again, and then closed for 1 minute after being open for 5 seconds;

[0067] 5) Repeat the opening and closing process of discharge valve 15 in step 4. When the current in the polymerization reactor drops to the idling current, step 4 is stopped.

[0068] 6) Close the plunger-type anti-blockage discharge valve, and close the discharge valve 15 after 5 seconds.

[0069] This embodiment achieves repeated disturbance of polybutene by regularly opening and closing the discharge valve 15, while meeting the discharge requirements. This can break up the agglomeration of polybutene between the bottom of the reactor 12 and the plunger 2, as well as the agglomeration of polybutene between the top sealing ring 8 and the bottom sealing ring 9, ensuring normal discharge. Furthermore, this embodiment closes the discharge valve 15 5 seconds after discharge is completed, allowing the residual polybutene between the top sealing ring 8 and the bottom sealing ring 9 to be discharged, thus truly avoiding interference of polybutene agglomeration on the operation of the discharge valve.

[0070] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A plunger-type anti-clogging discharge valve, characterized in that, Includes the main discharge pipe, plunger, and branch discharge pipe; The discharge main pipe is a cylindrical pipe with one end connected to the discharge port of the reactor. The end of the discharge main pipe away from the reactor is provided with an end plate, and a discharge port is opened on the side wall of the discharge main pipe. The plunger is a cylindrical block that abuts against the inner wall of the discharge main pipe and forms a sliding connection with the discharge main pipe. The plunger includes a top sealing ring and a bottom sealing ring, which correspond one-to-one with the two ends of the plunger. The minimum distance between the top sealing ring and the bottom sealing ring is less than the distance between the bottom of the discharge port and the top of the end plate. One end of the discharge branch pipe is connected to the discharge port, and the other end is connected to the flash evaporator through the discharge pipe; The minimum distance between the top sealing ring and the bottom sealing ring is greater than the distance from the top of the discharge port to the bottom of the outlet.

2. The plunger-type anti-clogging discharge valve as described in claim 1, characterized in that, The end plate is provided with a through hole; the through hole is located at the geometric center of the end plate and is opened along the direction of the central axis of the end plate.

3. A plunger-type anti-clogging discharge valve as described in claim 2, characterized in that, It also includes a connecting rod that passes through a through hole in the end plate and connects to the bottom of the plunger.

4. A plunger-type anti-clogging discharge valve as described in claim 3, characterized in that, The connecting rod includes a limiting block, which is installed at the end of the connecting rod away from the plunger and is used to lock the displacement of the plunger toward the reactor. When the limiting block is pressed against the end plate, the plunger passes through the discharge port of the reactor and protrudes from the bottom surface of the reactor.

5. A plunger-type anti-clogging discharge valve as described in claim 4, characterized in that, When the limiting block abuts against the end plate, the upper surface of the top sealing ring is flush with the bottom surface of the reactor.

6. A plunger-type anti-clogging discharge valve as described in claim 1, characterized in that, The angle between the direction of the discharge branch pipe and the axis of the discharge main pipe is 45°.

7. A plunger-type anti-clogging discharge valve as described in claim 6, characterized in that, The top sealing rings are spaced apart and arranged in parallel; the bottom sealing rings are spaced apart and arranged in parallel.

8. A clog-resistant discharge system, comprising a plunger-type clog-resistant discharge valve as described in any one of claims 1-7, characterized in that, It also includes a reaction vessel and a flash evaporator; the discharge branch pipe is connected to the flash evaporator through the discharge pipe, and a discharge valve is provided between the discharge branch pipe and the discharge pipe.

9. A material discharge method utilizing the anti-blocking discharge system as described in claim 8, characterized in that, Includes the following steps: 1) Fully open the discharge valve, and then fully open the plunger-type anti-blockage discharge valve; 2) After the plunger-type anti-blockage discharge valve is fully open for 3 seconds, the discharge valve is closed, and the plunger-type anti-blockage discharge valve remains fully open to check for any internal leakage. 3) After the inspection is completed, the discharge valve is fully opened, and then closed for 1 minute after the discharge valve has been open for 5 seconds; 4) The discharge valve is fully opened again, and then closed for 1 minute after being open for 5 seconds; 5) Repeat the opening and closing process of the discharge valve in step 4. Stop step 4 when the current in the polymerization reactor drops to the idling current. 6) Close the plunger-type anti-blockage discharge valve, and close the discharge valve after 5 seconds.

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