Safety valve for solvent recovery distillation kettle

Abstract

The utility model relates to the technical field of chemical engineering, in particular to a safety valve for a solvent recovery distillation still, which comprises a base, a round cover is arranged on the outer wall of the base, a drain pipe is arranged on the side wall of the round cover, a connecting pipe is arranged on the bottom end wall of the base, and a cylinder is arranged on the inner bottom wall of the base. A long hole and a short hole are formed in the outer wall of the cylinder; a top seat is arranged on the top end wall of the base, an air outlet hole is formed in the top end wall face of the top seat in a penetrating mode, a connecting rod is arranged on the top end wall of the top seat and located on the inner side of the air outlet hole, a connecting seat is arranged on the top end wall of the connecting rod, and a sealing mechanism is arranged on the inner top wall of the top seat. The safety valve can automatically adjust the pressure relief speed, can be adjusted in real time according to the pressure change in the distillation still, ensures that the pressure is always in a safety range, greatly reduces the possibility of dangerous accidents such as explosion caused by overhigh pressure, and provides reliable safety guarantee for operators and equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical engineering, and particularly relates to a safety valve for a solvent recovery distillation kettle. Background Art

[0002] The basic principle of distillation is to partially vaporize a liquid mixture and utilize the different volatilities of its components to achieve the separation purpose through a unit operation. Distillation can be divided into simple distillation, flash distillation, rectification, and special rectification according to its operation methods. The function of a distillation kettle is to vaporize the liquid to be distilled and provide the necessary rising steam volume in the tower.

[0003] In the prior art, the inside of the distillation kettle will first be heated at a high temperature and then cooled. During the alternation of hot and cold, since distillation needs to be carried out under a pressure condition higher than atmospheric pressure, when the operating pressure is higher than atmospheric pressure and the discharge port is opened, the pressure inside the kettle suddenly decreases, and the liquid instantly vaporizes to generate a large amount of steam gushing out from the discharge port, and in a more serious case, it may cause the explosion of the distillation kettle. Therefore, there is an urgent need to propose a safety valve for a solvent recovery distillation kettle. Content of the Utility Model

[0004] In order to solve the above problems, the utility model designs a safety valve for a solvent recovery distillation kettle.

[0005] In order to achieve the above technical purposes and reach the above technical effects, the utility model is realized through the following technical solutions:

[0006] A safety valve for a solvent recovery distillation kettle includes a base. A round cover is provided on the outer wall of the base. A drain pipe is provided on the side wall of the round cover. A connecting pipe is provided on the bottom end wall of the base. A cylinder is provided on the inner bottom wall of the base. Long holes and short holes are formed on the outer wall of the cylinder.

[0007] A top seat is provided on the top end wall of the base. An air outlet hole is formed through the top end wall of the top seat. A connecting rod is provided on the top end wall of the top seat and inside the air outlet hole. A connecting seat is provided on the top end wall of the connecting rod. A sealing mechanism is provided on the inner top wall of the top seat.

[0008] Further, the sealing mechanism includes a round rod. A spring is provided on the inner top wall of the round rod. A spring seat is provided on the bottom end wall of the spring. A sliding rod is provided on the bottom end wall of the spring seat. The bottom end of the sliding rod extends out of the round rod and is inserted into the cylinder. A piston is provided at the bottom end of the sliding rod.

[0009] Further, the length of the long hole is greater than that of the short hole.

[0010] Further, the air outlet holes are arranged in a circumferential gap on the top end wall of the top seat.

[0011] Furthermore, the inner cavities between the base, the connecting pipe, the cylinder and the top seat are connected and communicated with each other.

[0012] The beneficial effects of the present utility model are as follows:

[0013] This safety valve can automatically adjust the pressure relief speed, which can be adjusted in real time according to the pressure change in the distillation kettle, ensuring that the pressure is always within the safe range, greatly reducing the possibility of dangerous accidents such as explosion caused by too high pressure, and providing reliable safety protection for operators and equipment;

[0014] Whether it is the pressure fluctuation during normal production or the sudden pressure rise in case of emergencies, this safety valve with automatic pressure relief speed adjustment can quickly respond and adapt to various complex working conditions, effectively preventing accidents;

[0015] The function of automatically adjusting the pressure relief speed can keep the pressure in the distillation kettle relatively stable, avoid affecting the continuity and stability of the production process due to excessive pressure fluctuation, ensure the smooth progress of the production process, and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 is a schematic structural diagram of the present utility model;

[0018] Figure 2 is a schematic diagram of the unfolded structure of the main body of the present utility model;

[0019] Figure 3 is a schematic diagram of the internal structure of the round rod of the present utility model.

[0020] In the drawings, the list of components represented by each reference numeral is as follows:

[0021] 1. Base, 2. Round cover, 3. Drain pipe, 4. Connecting pipe, 5. Cylinder, 6. Long hole, 7. Short hole, 8. Top seat, 9. Air outlet hole, 10. Connecting rod, 11. Connecting seat, 12. Round rod, 13. Spring, 14. Spring seat, 15. Slide rod, 16. Piston. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with 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 belong to the protection scope of the present utility model.

[0023] Referring to Figures 1-3 As shown, a safety valve for a solvent recovery distillation kettle includes a base 1. A round cover 2 is provided on the outer wall of the base 1. A drain pipe 3 is provided on the side wall of the round cover 2. A connecting pipe 4 is provided on the bottom end wall of the base 1. A cylinder 5 is provided on the inner bottom wall of the base 1. Long holes 6 and short holes 7 are formed on the outer wall of the cylinder 5.

[0024] A top seat 8 is provided on the top end wall of the base 1. An air outlet hole 9 is formed through the top end wall surface of the top seat 8. A connecting rod 10 is provided on the top end wall of the top seat 8 and inside the air outlet hole 9. A connecting seat 11 is provided on the top end wall of the connecting rod 10. A sealing mechanism is provided on the inner top wall of the top seat 8.

[0025] Further, the sealing mechanism includes a round rod 12. A spring 13 is provided on the inner top wall of the round rod 12. A spring seat 14 is provided on the bottom end wall of the spring 13. A sliding rod 15 is provided on the bottom end wall of the spring seat 14. The bottom end of the sliding rod 15 extends out of the round rod 12 and is inserted into the cylinder 5. A piston 16 is provided at the bottom end of the sliding rod 15. Air pressure enters the cylinder 5 through the connecting pipe 4, pushing the piston 16, the sliding rod 15 and the spring seat 14 upward and compressing the spring 13. As the air pressure increases, the piston 16 moves upward from the bottom in the cylinder 5, and the gas enters the base 1 through the long holes 6, enters the top seat 8 upward, and is discharged through the air outlet hole 9 to achieve the pressure relief operation.

[0026] Further, the length of the long hole 6 is greater than that of the short hole 7. When the air pressure gradually increases, the piston 16 continues to move upward, and the gas is quickly discharged through the long hole 6 and the short hole 7 to achieve rapid pressure relief. The higher the piston 16 moves upward, the faster the pressure relief speed.

[0027] Further, the air outlet holes 9 are arranged in a circumferential gap on the top end wall surface of the top seat 8. Air pressure enters the cylinder 5 through the connecting pipe 4, pushing the piston 16, the sliding rod 15 and the spring seat 14 upward. The gas enters the base 1 through the long holes 6, enters the top seat 8 upward, and is discharged through the air outlet holes 9 to achieve the pressure relief operation.

[0028] Further, the inner cavities between the base 1, the connecting pipe 4, the cylinder 5 and the top seat 8 are connected and communicated, which is convenient for discharging the gas in the distillation kettle to the outside.

[0029] The detailed connection means are well-known technologies in the art. All components in this solution are common standard parts or parts known to those skilled in the art, and their structures and principles can be learned by those skilled in the art through technical manuals or by conventional experimental methods.

[0030] A specific application of this embodiment is as follows:

[0031] During use, when the internal pressure of the distillation kettle reaches a predetermined value during operation, the pressure enters the cylinder 5 through the connecting pipe 4, pushing the piston 16, the slide rod 15, and the spring seat 14 upward and compressing the spring 13. As the pressure increases, the piston 16 moves upward from the bottom inside the cylinder 5, and the gas enters the base 1 through the long hole 6, moves upward into the top seat 8, and is discharged through the air outlet 9 to achieve the pressure relief operation. The connecting seat 11 shields the high-pressure gas to prevent scalding of personnel. The condensed water generated on the connecting seat 11 drops downward into the dome 2 for collection. When the pressure gradually increases, the piston 16 continues to move upward, and the gas is quickly discharged through the long hole 6 and the short hole 7 to achieve rapid pressure relief. The higher the piston 16 moves upward, the faster the pressure relief speed. When the pressure decreases, the piston 16 moves downward under the elastic force of the spring 13.

[0032] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Any changes, alterations, additions, or substitutions made by those of ordinary skill in the art within the scope of the essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A safety valve for a solvent recovery distillation kettle, characterized in that: It includes a base (1). A round cover (2) is provided on the outer wall of the base (1). A drain pipe (3) is provided on the side wall of the round cover (2). A connecting pipe (4) is provided on the bottom end wall of the base (1). A cylinder (5) is provided on the inner bottom wall of the base (1). Long holes (6) and short holes (7) are formed on the outer wall of the cylinder (5). A top base (8) is provided on the top end wall of the base (1). An air outlet hole (9) is formed through the top end wall surface of the top base (8). A connecting rod (10) is provided on the top end wall of the top base (8) and inside the air outlet hole (9). A connecting seat (11) is provided on the top end wall of the connecting rod (10). A sealing mechanism is provided on the inner top wall of the top base (8).

2. The safety valve for a solvent recovery distillation still according to claim 1, characterized in that: The sealing mechanism includes a round rod (12). A spring (13) is provided on the inner top wall of the round rod (12). A spring seat (14) is provided on the bottom end wall of the spring (13). A sliding rod (15) is provided on the bottom end wall of the spring seat (14). The bottom end of the sliding rod (15) extends out of the round rod (12) and is inserted into the cylinder (5). A piston (16) is provided at the bottom end of the sliding rod (15).

3. The safety valve for a solvent recovery distillation kettle according to claim 1, characterized in that: The length of the long hole (6) is greater than that of the short hole (7).

4. The safety valve for a solvent recovery distillation still according to claim 1, characterized in that: The air outlet holes (9) are arranged in a circumferential gap on the top end wall surface of the top base (8).

5. The safety valve for a solvent recovery distillation kettle according to claim 1, characterized in that: The inner cavities between the base (1), the connecting pipe (4), the cylinder (5) and the top base (8) are connected and communicated with each other.

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