Safe reaction kettle for chemical production

Abstract

The utility model relates to the technical field of reaction kettles, in particular to a safe reaction kettle for chemical production, which comprises a kettle body, a cooling jacket is arranged on the outer wall of the pressure relief tank, a pressure relief opening is formed in the upper portion of the side wall of the pressure relief tank, a pressure-bearing piston is arranged in the pressure relief tank, the pressure-bearing piston is in sealed sliding connection with the inner wall of the pressure relief tank, a pressure-bearing opening and an exhaust opening are formed in the pressure-bearing piston, the top of the pressure-bearing piston is fixedly connected with the bottom end of a pushing rod, and a balancing weight is fixed to the top end of the pushing rod. The number of the pressure relief tanks is at least two, the pressure bearing opening of the pressure relief tank located on the innermost side is connected with the pressure relief opening of the kettle body through the pressure relief pipe, the adjacent pressure relief tanks are sequentially connected in series through the pressure relief pipe, one end of the pressure relief pipe is connected with the pressure relief opening of the pressure relief pipe, and the other end of the pressure relief pipe is connected with the pressure bearing opening of the adjacent pressure relief tank on the outer side. When the reaction is out of control, gas-liquid materials are discharged out of the reaction kettle in time and are cooled while being stored step by step, so that production accidents caused by sudden pressure increase are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of reaction kettles, in particular to a safety reaction kettle for chemical production. Background Art

[0002] A reactor, also known as a reaction tank or reactor, is a container used to realize chemical reactions. It can withstand a certain pressure and temperature to ensure that the chemical reaction proceeds smoothly under specific conditions. During the chemical reaction process, due to factors such as the nature of the reactants and changes in reaction conditions, dangerous situations such as runaway reactions, sudden increases in temperature and pressure may sometimes occur. If the pressure is not released and the materials are not discharged in time, these situations may lead to serious consequences such as reactor rupture and explosion, resulting in production safety accidents.

[0003] China utility model patent authorization announcement number CN204799270U proposes a safe explosion-proof polymer polymerization reactor, including a reactor body, a reducer is fixed at the top center of the reactor body, a motor is fixedly connected to the upper side of the reducer, a stirring shaft is vertically arranged inside the reactor body on the lower side of the reducer, an overheat protection device is arranged on the upper outer ring of the stirring shaft, an anchor stirring paddle is arranged on the lower part of the stirring shaft, and paddles are welded on the left and right sides of the bottom of the anchor stirring paddle, a condensing device is arranged on the inner bottom outer ring of the reactor body, a pressure gauge, a thermometer and an automatic explosion-proof start valve are arranged on the right side of the top of the reactor body, a jacket is sleeved on the middle outer ring of the reactor body, and a temperature control device is arranged inside the jacket. The device mainly eliminates the stirring dead angle through the setting of the anchor stirring paddle, so that the reaction is fully mixed, and the condensing device is arranged on the bottom outer ring of the reactor body, and the cooling effect is better by cooperating with the anchor stirring paddle. However, for the dangerous situation of out-of-control reaction, this structure cannot relieve the pressure in the reactor in time, and there is a great hidden danger of production safety. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a safety reactor for chemical production, which can discharge gas and liquid materials from the reactor in time when the reaction is out of control, and cool them down while collecting them step by step, thus avoiding production accidents caused by sudden pressure increase.

[0005] The safety reactor for chemical production described in the utility model comprises a reactor body, and a pressure discharge port is arranged on the upper part of the reactor body; it also comprises a pressure relief tank with a cylindrical inner cavity, a cooling jacket is arranged on the outer wall of the pressure relief tank, a liquid discharge port is arranged on the bottom of the pressure relief tank, a pressure relief port is arranged on the upper part of the side wall of the pressure relief tank, a pressure-bearing piston is arranged inside the pressure relief tank, the pressure-bearing piston is sealingly and slidably connected with the inner wall of the pressure relief tank, a pressure-bearing port and a gas discharge port are opened on the pressure-bearing piston, the top of the pressure-bearing piston is fixedly connected with the bottom end of a propulsion rod, a counterweight block is fixed on the top of the propulsion rod, a fixed beam is arranged on the top of the pressure relief tank, the propulsion rod passes through the fixed beam and is slidably connected with the fixed beam; at least two pressure relief tanks are arranged, the pressure relief tank located at the innermost side has its pressure-bearing port connected to the pressure discharge port of the reactor body through a pressure discharge pipe, adjacent pressure relief tanks are connected in series in sequence through pressure relief pipes, one end of the pressure relief pipe is connected to the pressure discharge port of the pressure relief tank, and the other end is connected to the pressure-bearing port of the adjacent pressure relief tank on its outer side.

[0006] Preferably, a stirring mechanism is provided in the kettle.

[0007] Preferably, both the pressure discharge pipe and the pressure relief pipe are high-pressure flexible pipes and will not interfere with the movement of the pressure-bearing piston.

[0008] Preferably, both the pressure discharge port and the pressure relief port are provided with safety valves.

[0009] Preferably, an exhaust valve is provided on the exhaust port, and a drain valve is provided on the drain port.

[0010] Preferably, a hydraulic cylinder is provided above the pressure relief tank, a piston rod of the hydraulic cylinder is arranged corresponding to the counterweight block, and the hydraulic cylinder is installed on the lifting bracket.

[0011] Preferably, the lifting bracket includes a vertically arranged electric telescopic rod and a base, and the hydraulic cylinder is connected to the base via the electric telescopic rod.

[0012] Preferably, a force block is provided at the end of the piston rod of the hydraulic cylinder, a force groove is provided at the top of the counterweight block, and the force block is matched with the force groove.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. At the beginning of production, the pressure-bearing piston is located at the bottom of the pressure relief tank. When the reaction in the kettle is out of control and the pressure is increased sharply, the safety valve on the pressure discharge port opens, and a large amount of liquid mixed with gas materials in the kettle surges up, and flows into the space between the pressure-bearing piston and the bottom of the pressure relief tank through the pressure discharge pipe and the pressure-bearing port. The pressure of the gas-liquid materials overcomes the force applied to the pressure-bearing piston by the counterweight block, and pushes the pressure-bearing piston upward. At the same time, the cooling jacket outside the pressure relief tank cools the material in the pressure relief tank to slow down the reaction rate, reduce the temperature and pressure; when the pressure-bearing piston is pushed up to make the pressure relief port located below the pressure-bearing piston, the pressure continues to increase to break through the preset pressure of the safety valve at the pressure relief port, and the material can be discharged into the adjacent pressure relief tank through the pressure relief pipe and the pressure port of the adjacent pressure relief tank on the outside, and so on. The utility model can collect the material step by step while cooling it down, and slow down the reaction process step by step in an emergency, effectively preventing equipment damage, ensuring personnel safety, and avoiding the occurrence of production accidents;

[0015] 2. The utility model connects multiple pressure relief tanks in series, and automatically selects the number of pressure relief tanks to be put into use according to the actual pressure conditions. It is flexible to use and has strong controllability in operation;

[0016] 3. When the reaction stops, the gas remaining in the pressure relief tank is discharged through the exhaust port, and the liquid in the pressure relief tank is discharged from the drain port by pressing down the pressure-bearing piston. The discharge is convenient and thorough, saving the time for subsequent cleaning work. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a safety reactor for chemical production of the utility model;

[0018] Figure 2 It is a schematic diagram of the pressure relief tank structure;

[0019] Figure 3 It is a schematic diagram of the internal structure of the pressure relief tank;

[0020] In the figure: 1. kettle body; 2. pressure discharge port; 3. pressure relief tank; 4. cooling jacket; 5. drain port; 6. pressure relief port; 7. pressure-bearing piston; 8. pressure-bearing port; 9. exhaust port; 10. thrust rod; 11. counterweight block; 12. fixed beam; 13. pressure discharge pipe; 14. pressure relief pipe; 15. stirring mechanism; 16. safety valve; 17. exhaust valve; 18. drain valve; 19. hydraulic cylinder; 20. electric telescopic rod; 21. base; 22. force block; 23. force groove. DETAILED DESCRIPTION

[0021] The present invention will be described clearly and completely below with reference to the accompanying drawings.

[0022] Example 1

[0023] like Figure 1 , Figure 2As shown, the safety reactor for chemical production described in the utility model includes a reactor body 1, and a pressure discharge port 2 is provided on the upper part of the reactor body 1; it also includes a pressure relief tank 3 with a cylindrical inner cavity, a cooling jacket 4 is provided on the outer wall of the pressure relief tank 3, a liquid discharge port 5 is provided at the bottom of the pressure relief tank 3, and a pressure relief port 6 is provided on the upper part of the side wall of the pressure relief tank 3. A pressure-bearing piston 7 is provided inside the pressure relief tank 3, and the pressure-bearing piston 7 is sealingly and slidably connected to the inner wall of the pressure relief tank 3. A pressure-bearing port 8 and an exhaust port 9 are opened on the pressure-bearing piston 7, and the top of the pressure-bearing piston 7 is fixedly connected to the push A counterweight block 11 is fixed at the bottom of the rod 10 and the top of the propulsion rod 10. A fixed beam 12 is provided on the top of the pressure relief tank 3. The propulsion rod 10 passes through the fixed beam 12 and is slidably connected to the fixed beam 12. There are two pressure relief tanks 3. The pressure relief tank 3 located on the innermost side has its pressure port 8 connected to the pressure discharge port 2 of the kettle body 1 through a pressure discharge pipe 13. Adjacent pressure relief tanks 3 are connected in series in sequence through pressure relief pipes 14. One end of the pressure relief pipe 14 is connected to the pressure relief port 6 of the pressure relief tank 3, and the other end is connected to the pressure port 8 of the adjacent pressure relief tank 3 on its outside.

[0024] A stirring mechanism 15 is provided in the kettle body 1 .

[0025] The pressure discharge pipe 13 and the pressure relief pipe 14 are both high-pressure flexible pipes.

[0026] Both the pressure discharge port 2 and the pressure relief port 6 are provided with safety valves 16 .

[0027] like Figure 3 As shown, an exhaust valve 17 is provided on the exhaust port 9, and a drain valve 18 is provided on the drain port 5.

[0028] The working process is as follows: At the beginning of production, the pressure-bearing piston 7 is located at the bottom of the pressure relief tank 3. When the reaction in the kettle body 1 is out of control and the pressure increases sharply, the safety valve 16 on the pressure discharge port 2 opens, and the gaseous and liquid materials in the kettle body 1 flow into the space between the pressure-bearing piston 7 and the bottom of the pressure relief tank 3 through the pressure discharge pipe 13 and the pressure port 8. The pressure of the gaseous and liquid materials overcomes the force applied to the pressure-bearing piston 7 by the counterweight block 11, and pushes the pressure-bearing piston 7 upward. At the same time, the cooling jacket 4 outside the pressure relief tank 3 cools the material in the pressure relief tank 3 to slow down the reaction rate, reduce the temperature and pressure; when the pressure-bearing piston 7 is pushed up to make the pressure relief port 6 located below the pressure-bearing piston 7, the pressure continues to increase to break through the preset pressure of the safety valve 16 of the pressure relief port 6, and the material can be discharged into the adjacent pressure relief tank 3 through the pressure relief pipe 14 and the pressure port 8 of the adjacent pressure relief tank 3 on the outside. In this way, the pressure in the kettle body 1 can be reduced in time, and the materials discharged from the kettle body 1 are discharged into the two pressure relief tanks 3 in sequence and cooled respectively, which effectively reduces the reaction rate and avoids safety accidents.

[0029] Example 2

[0030] On the basis of Example 1, Figure 1As shown, a hydraulic cylinder 19 is provided above the pressure relief tank 3, and the piston rod of the hydraulic cylinder 19 is arranged corresponding to the counterweight 11, and the hydraulic cylinder 19 is installed on the lifting bracket. The lifting bracket includes a vertically arranged electric telescopic rod 20 and a base 21, and the hydraulic cylinder 19 is connected to the base 21 through the electric telescopic rod 20.

[0031] like Figure 2 As shown, a force block 22 is provided at the end of the piston rod of the hydraulic cylinder 19, and a force groove 23 is provided at the top of the counterweight block 11, and the force block 22 and the force groove 23 are matched.

[0032] The working process is as follows: when the reaction stops, the pressure relief tank 3 needs to be cleaned, the electric telescopic rod 20 is adjusted to place the force block 22 on the piston rod of the hydraulic cylinder 19 in the force groove 23, the hydraulic cylinder 19 is started to press the pressure-bearing piston 7 downward, the exhaust valve 17 is opened, and the gas remaining in the pressure relief tank 3 is discharged through the exhaust port 9. After the gas is discharged, the exhaust valve 17 is closed, the pressure-bearing piston 7 is continued to be pressed down, and the drain valve 18 is opened to discharge the liquid in the pressure relief tank 3 from the drain port 5. The discharge is convenient and thorough, saving the time for subsequent cleaning work.

Claims

1. A safety reactor for chemical production, comprising a reactor body (1), characterized in that: The kettle body (1) is provided with a pressure discharge port (2) at the top; the kettle body (1) also includes a pressure relief tank (3) with a cylindrical inner cavity, the outer wall of the pressure relief tank (3) is provided with a cooling jacket (4), the bottom of the pressure relief tank (3) is provided with a liquid discharge port (5), the upper part of the side wall of the pressure relief tank (3) is provided with a pressure relief port (6), the pressure relief tank (3) is provided with a pressure bearing piston (7), the pressure bearing piston (7) is sealingly and slidably connected to the inner wall of the pressure relief tank (3), the pressure bearing piston (7) is provided with a pressure bearing port (8) and a gas discharge port (9), the top of the pressure bearing piston (7) is fixedly connected to the bottom end of a propulsion rod (10), and the top of the propulsion rod (10) is fixedly connected to the bottom end of the propulsion rod (10). A counterweight block (11) is provided, a fixed beam (12) is provided on the top of the pressure relief tank (3), and a propulsion rod (10) passes through the fixed beam (12) and is slidably connected to the fixed beam (12); at least two pressure relief tanks (3) are provided, the pressure-bearing port (8) of the innermost pressure relief tank (3) is connected to the pressure discharge port (2) of the kettle body (1) through a pressure discharge pipe (13), and adjacent pressure relief tanks (3) are connected in series in sequence through pressure relief pipes (14), one end of the pressure relief pipe (14) is connected to the pressure discharge port (6) of the pressure relief tank (3), and the other end is connected to the pressure-bearing port (8) of the adjacent pressure relief tank (3) on the outside.

2. The safety reactor for chemical production according to claim 1, characterized in that: A stirring mechanism (15) is provided in the kettle body (1).

3. The safety reactor for chemical production according to claim 1, characterized in that: The pressure discharge pipe (13) and the pressure relief pipe (14) are both high-pressure flexible pipes.

4. The safety reactor for chemical production according to claim 1, characterized in that: Safety valves (16) are provided on the pressure discharge port (2) and the pressure relief port (6).

5. The safety reactor for chemical production according to claim 1, characterized in that: An exhaust valve (17) is provided on the exhaust port (9), and a liquid discharge valve (18) is provided on the liquid discharge port (5).

6. The safety reactor for chemical production according to claim 1, characterized in that: A hydraulic cylinder (19) is provided above the pressure relief tank (3); a piston rod of the hydraulic cylinder (19) is arranged corresponding to the counterweight (11); and the hydraulic cylinder (19) is mounted on a lifting bracket.

7. The safety reactor for chemical production according to claim 6, characterized in that: The lifting bracket comprises a vertically arranged electric telescopic rod (20) and a base (21), and the hydraulic cylinder (19) is connected to the base (21) via the electric telescopic rod (20).

8. The safety reactor for chemical production according to claim 6, characterized in that: A force-applying block (22) is provided at the end of the piston rod of the hydraulic cylinder (19), a force-bearing groove (23) is provided at the top of the counterweight block (11), and the force-applying block (22) and the force-bearing groove (23) are arranged in a matching manner.

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