Automatic drainage device for crude vinyl chloride monomer tank

Abstract

The utility model relates to crude chlorine vinyl processing technical field, and disclose a kind of crude chlorine vinyl monomer storage tank automatic drainage device, including storage tank, fixed mounting has liquid inlet pipe and liquid outlet pipe on the storage tank, further include: fixedly installed in the water collecting tank of storage tank bottom, the inner wall of the storage tank is fixedly installed with limit rod;The utility model utilizes overflow baffle and divides the different regions in storage tank, so that the liquid phase chlorine vinyl monomer with density less than water is mainly preserved in one side of storage tank, and water is settled in water collecting tank area.Drainage assembly utilizes float when liquid level rises, first drive sealing sleeve two from drainage groove place to move up, so that settlement water is discharged from water collecting tank;Liquid level further rises, sealing sleeve one rises to the upper portion of drainage hole, drainage hole also starts to drain, accelerates drainage speed, this phased drainage mode can more thoroughly drain the deposited water, reduce the mixing of moisture in chlorine vinyl monomer, guarantee the purity of crude chlorine vinyl monomer and subsequent use quality.

Description

Technical Field

[0001] This utility model relates to the field of crude vinyl chloride processing technology, specifically to an automatic drainage device for crude vinyl chloride monomer storage tanks. Background Technology

[0002] In the PVC production process, acetylene and hydrogen chloride react under the catalysis of a mercuric chloride catalyst to produce vinyl chloride. The resulting vinyl chloride monomer undergoes a pre-process washing process to remove acidic impurities such as hydrogen chloride. After pressurization and condensation, it enters the distillation system in liquid form to remove high-boiling and low-boiling impurities from the vinyl chloride monomer. However, the water contained in the liquid vinyl chloride monomer cannot be removed during this process. The presence of water can lead to the formation of self-polymers in the distillation system, clogging the distillation system pipelines and affecting continuous production. Furthermore, it can affect the quality of subsequent polymerization products, impacting polymer viscosity and causing PVC resin transformation. Therefore, a crude vinyl chloride monomer storage tank is installed before the pressurized and condensed vinyl chloride monomer enters the distillation system. This ensures the continuity of the process. Additionally, the crude vinyl chloride monomer storage tank is equipped with an internal semi-circular baffle overflow and a water collection bag. The density difference between vinyl chloride monomer and water is used for sedimentation separation, with the water being discharged through gravity sedimentation into the water collection bag.

[0003] Many traditional methods of draining crude vinyl chloride monomer storage tanks rely on sight glasses to observe the water level, followed by regular checks by staff to open or close the drain valves. This method is not only inefficient but also prone to problems such as delayed or excessive drainage due to human error or untimely operation. Utility Model Content

[0004] The purpose of this invention is to provide an automatic drainage device for crude vinyl chloride monomer storage tanks to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic drainage device for a crude vinyl chloride monomer storage tank, comprising a storage tank, wherein an inlet pipe and an outlet pipe are fixedly installed on the storage tank, and further comprising: A water collection tank is fixedly installed at the bottom of the storage tank. A limit rod is fixedly installed on the inner wall of the storage tank. A drainage component is installed on the outer side of the limit rod to discharge the water that settles in the storage tank from the water collection tank. An overflow baffle is fixedly installed on the inner wall of the storage tank.

[0006] Preferably, the inlet pipe is welded to the top of the storage tank, and the outlet pipe is welded to the side of the storage tank.

[0007] Preferably, the limiting rod is welded to the top of the inner cavity of the storage tank.

[0008] Preferably, the drainage assembly includes a movable rod sleeved on the outside of the limiting rod, a float fixedly installed on the outside of the movable rod, a connecting rod fixedly installed at the bottom of the movable rod, a sealing sleeve one and a sealing sleeve two fixedly installed on the connecting rod, a drain pipe welded to the bottom of the inner cavity of the water collection tank, and a drain groove provided on the drain pipe.

[0009] Preferably, the bottom of the water collection tank is provided with a drain hole, which is connected to the drain trough.

[0010] Preferably, a retaining cover is fixedly installed on the outside of the water collection tank, a conduit is fixedly installed on the bottom of the retaining cover, and a valve is fixedly installed on the conduit.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention utilizes an overflow baffle to divide the interior of the storage tank into different zones, ensuring that the liquid vinyl chloride monomer, with a density less than water, is primarily stored on one side of the tank, while water settles in the collection tank area. The drainage assembly uses a float that, as the liquid level rises, first moves the second sealing sleeve upwards from the drainage channel, allowing the settled water to drain from the collection tank. As the liquid level rises further, the first sealing sleeve rises above the drainage hole, and the drainage hole also begins to drain, accelerating the drainage process. This staged drainage method can more thoroughly remove the deposited water, reduce the mixing of moisture into the vinyl chloride monomer, and ensure the purity of the crude vinyl chloride monomer and its subsequent use quality. Attached Figure Description

[0012] Figure 1 A schematic diagram of the main structure of the automatic drainage device for crude vinyl chloride monomer storage tank provided by this utility model; Figure 2 A schematic diagram of the internal structure of the storage tank provided by this utility model; Figure 3 This is a schematic diagram of the internal structure of the water collection tank provided by this utility model; Figure 4 A schematic diagram of the drainage component structure provided by this utility model; Figure 5 A schematic diagram of the card cover structure provided by this utility model.

[0013] In the diagram: 1. Storage tank; 2. Inlet pipe; 3. Outlet pipe; 4. Water collection tank; 5. Cover; 6. Limiting rod; 7. Drainage assembly; 71. Moving rod; 72. Float; 73. Connecting rod; 74. Sealing sleeve one; 75. Sealing sleeve two; 76. Drain pipe; 77. Drainage trough; 8. Overflow baffle; 9. Conduit; 10. Valve. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-5 As shown, an automatic drainage device for a crude vinyl chloride monomer storage tank includes a storage tank 1, with an inlet pipe 2 and an outlet pipe 3 fixedly installed on the storage tank 1. It also includes a water collection tank 4 fixedly installed at the bottom of the storage tank 1, a limit rod 6 fixedly installed on the inner wall of the storage tank 1, and a drainage assembly 7 installed on the outer side of the limit rod 6 to discharge settled water from the water collection tank 4. An overflow baffle 8 is fixedly installed on the inner wall of the storage tank 1. The inlet pipe 2 is welded to the top of the storage tank 1, and the outlet pipe 3 is welded to the side of the storage tank 1.

[0016] Liquid vinyl chloride monomer is transported to storage tank 1 through inlet pipe 2. Since the density of liquid vinyl chloride monomer is less than that of water, liquid vinyl chloride flows into the left side of storage tank 1 through overflow baffle 8 for storage. As the liquid level rises, the conveying drainage component 7 works to discharge the denser water from the bottom of collection tank 4.

[0017] Based on the above implementation scheme, the limiting rod 6 is welded to the top of the inner cavity of the storage tank 1; the drainage assembly 7 includes a movable rod 71 sleeved on the outside of the limiting rod 6, a float 72 fixedly installed on the outside of the movable rod 71, a connecting rod 73 fixedly installed at the bottom of the movable rod 71, a sealing sleeve 74 and a sealing sleeve 75 fixedly installed on the connecting rod 73, a drain pipe 76 is welded to the bottom of the inner cavity of the water collection tank 4, and a drain groove 77 is opened on the drain pipe 76; a drain hole is opened at the bottom of the water collection tank 4, and the drain hole communicates with the drain groove 77; the top of the movable rod 71 is welded to the top of the storage tank 1. The top and bottom of the inner cavity are suspended. The float 72 is fixedly installed on the top of the moving rod 71 and slidably installed on the outside of the limiting rod 6. The connecting rod 73 is fixedly installed on the bottom of the moving rod 71 and also slides on the limiting rod 6. The first sealing sleeve 74 and the second sealing sleeve 75 are both fixedly installed on the connecting rod 73, with the first sealing sleeve 74 located at the top. The drain groove 77 is opened at the connection between the water collection tank 4 and the drain pipe 76. The upper part of the drain pipe 76 has a drain hole. The buoyancy of the float 72 in vinyl chloride must be greater than or equal to the sum of its weight and the friction force that the drain assembly 7 needs to overcome to move. In this way, even if vinyl chloride enters the water collection tank 4, the float 72 will not sink rapidly due to the decrease in buoyancy. The density of the float 72 can be designed to be slightly less than the density of water but much greater than the density of vinyl chloride. In this way, the float 72 can maintain a relatively stable position in the mixture of water and vinyl chloride. Only when the water level drops to a certain extent (i.e., the water is almost drained and vinyl chloride begins to occupy the main space of the water collection tank 4) will the float 72 begin to sink due to the significant decrease in buoyancy. However, at this time, the drainage process is nearing its end, and the sinking speed will be limited to a certain extent by the mechanical connection between the float 72 and the drainage component 7, so the drain outlet will not be blocked immediately.

[0018] When the liquid in the storage tank 1 rises to contact the float 72, the float 72 rises due to buoyancy. The float 72 drives the moving rod 71 and the connecting rod 73 to move upward. The sealing sleeve 1 74 and the sealing sleeve 2 75 move upward simultaneously. The sealing sleeve 2 75 moves upward first from the drain trough 77. At this time, the settled water in the storage tank 1 can be discharged from the water collection tank 4. When the sealing sleeve 1 74 rises to the top of the drain hole, the drain hole also begins to drain water, accelerating the drainage speed. As the water in the storage tank 1 gradually decreases, the float 72 gradually descends until the sealing sleeve 2 75 enters the drain pipe 76 and seals the drain trough 77. At this time, the drainage stops.

[0019] Based on the above implementation scheme, a retaining cover 5 is fixedly installed on the outside of the water collection tank 4, a conduit 9 is fixedly installed on the bottom of the retaining cover 5, and a valve 10 is fixedly installed on the conduit 9; the retaining cover 5 is welded to the water collection tank 4, and the conduit 9 is welded to the bottom of the retaining cover 5.

[0020] The cover 5 seals the water collection tank 4, which can prevent leakage caused by insufficient sealing of the bottom drain port of the water collection tank 4.

[0021] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic drainage device for a crude vinyl chloride monomer storage tank, comprising a storage tank (1), wherein an inlet pipe (2) and an outlet pipe (3) are fixedly installed on the storage tank (1), characterized in that, Also includes: A water collection tank (4) is fixedly installed at the bottom of the storage tank (1). A limit rod (6) is fixedly installed on the inner wall of the storage tank (1). A drainage component (7) is installed on the outside of the limit rod (6) to discharge the water that settles in the storage tank (1) from the water collection tank (4). An overflow baffle (8) is fixedly installed on the inner wall of the storage tank (1).

2. The automatic drainage device for a crude vinyl chloride monomer storage tank according to claim 1, characterized in that: The inlet pipe (2) is welded to the top of the storage tank (1), and the outlet pipe (3) is welded to the side of the storage tank (1).

3. The automatic drainage device for a crude vinyl chloride monomer storage tank according to claim 1, characterized in that: The limiting rod (6) is welded to the top of the inner cavity of the storage tank (1).

4. The automatic drainage device for a crude vinyl chloride monomer storage tank according to claim 1, characterized in that: The drainage assembly (7) includes a movable rod (71) sleeved on the outside of the limiting rod (6), a float (72) fixedly installed on the outside of the movable rod (71), a connecting rod (73) fixedly installed at the bottom of the movable rod (71), a sealing sleeve one (74) and a sealing sleeve two (75) fixedly installed on the connecting rod (73), a drain pipe (76) welded to the bottom of the inner cavity of the water collection tank (4), and a drain groove (77) opened on the drain pipe (76).

5. The automatic drainage device for a crude vinyl chloride monomer storage tank according to claim 4, characterized in that: The bottom of the water collection tank (4) is provided with a drain hole, which is connected to the drain trough (77).

6. The automatic drainage device for a crude vinyl chloride monomer storage tank according to claim 1, characterized in that: A cover (5) is fixedly installed on the outside of the water collection tank (4), a conduit (9) is fixedly installed at the bottom of the cover (5), and a valve (10) is fixedly installed on the conduit (9).

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