Epoxy resin safety production device

Abstract

The utility model belongs to the technical field of chemical reaction devices, and particularly relates to an epoxy resin safety production device. The epoxy resin safety production device comprises a reaction kettle and a material flushing buffer tank, the reaction kettle is connected with the material flushing buffer tank, a safety valve and a rupture disk are sequentially arranged on a connecting pipeline, a liquid outlet in the bottom of the material flushing buffer tank is connected with the reaction kettle, a liquid caustic soda feeding pipe is arranged on the reaction kettle, and a liquid outlet in the bottom of the material flushing buffer tank is connected with the reaction kettle. A liquid caustic soda feeding valve is arranged on the liquid caustic soda feeding pipe, the liquid caustic soda feeding valve is linked with a safety valve, and a cooling coil pipe is arranged on the outer wall of the material flushing buffer tank. The epoxy resin safety production device provided by the utility model avoids danger and ensures stable reaction in the reaction kettle through dual guarantee of the rupture disk and the safety valve.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical reaction devices, and particularly relates to a safety production device for epoxy resin. Background Art

[0002] The synthesis steps of epoxy resin are mainly as follows: bisphenol A (BPA) and epichlorohydrin (ECH) are dissolved and mixed, reacted under the action of saturated liquid alkali, refined with toluene added, toluene is removed, and finally obtained after filtration and other treatments. The core step unit is the reaction part, which mainly adds a large amount of 50wt% sodium hydroxide solution to the dissolved BPA and ECH, heats up to 50 - 60 °C and reacts for about 10 h, and then removes the excessive ECH to end the reaction. During the synthesis process of epoxy resin, due to complex reaction conditions and large reaction heat, long-term reaction is likely to cause problems such as unstable steam pressure and uneven addition of alkali solution, which in turn leads to safety risks such as out-of-control temperature and sharp rise in pressure. Traditional reaction kettles often lack effective immediate pressure relief measures when dealing with such emergencies, increasing the risk of material leakage and kettle explosion.

[0003] Epoxy resin has good physical and mechanical properties, electrical insulation properties, adhesion properties with various materials, and flexibility in its use process. Therefore, epoxy resin is widely used and has a large production volume in the fields of preparing coatings, composite materials, casting materials, adhesives, molding materials, injection molding materials, etc.

[0004] Patent CN211988625U provides a high-performance reaction kettle for producing polyester resin. Although it mentions that a rupture disk is fixedly connected to one side of the top of the kettle body, which is a bottom line of protection. When the internal pressure of the reaction kettle is too large and exceeds the internal bearing capacity of the reaction kettle itself, the rupture disk will break through, thereby reducing the internal pressure. However, conventional rupture disks may have problems of rupture and failure, and they will also pose a danger to the leaked reaction liquid. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is to overcome the above-mentioned defects existing in the prior art, and provide a safety production device for epoxy resin, which can avoid danger and ensure the stable progress of the reaction in the reaction kettle through the double guarantee of the rupture disk and the safety valve.

[0006] The epoxy resin production safety device described in the utility model includes a reactor and a material buffer tank. The reactor is connected to the material buffer tank, and a safety valve and a bursting disc are sequentially arranged on the connecting pipeline. The liquid outlet at the bottom of the material buffer tank is connected to the reactor. The reactor is provided with a liquid alkali feed pipe, and a liquid alkali feed valve is arranged on the liquid alkali feed pipe. The liquid alkali feed valve is linked to the safety valve, and a cooling coil is arranged on the outer wall of the material buffer tank. The cooling coil is arranged on the outer wall of the material buffer tank, and is used to cool the material in the tank to prevent excessive temperature from causing safety accidents or affecting the properties of the material. The heat transfer and dissipation is achieved by circulating a cooling medium (such as water or coolant) through the coil.

[0007] Preferably, a heating coil is provided on the outer wall of the reactor. As the main reaction vessel in the epoxy resin production process, the reactor is used to mix, heat and stir the reactants so that the epoxy resin raw materials undergo a chemical reaction under specific conditions to generate the desired epoxy resin product. The material buffer tank plays a buffering role in the reactor to prevent the instantaneous high pressure or material rushing phenomenon that may occur during the reaction process from directly impacting subsequent equipment, thereby ensuring production safety. At the same time, it can also collect and temporarily store by-products or incompletely reacted materials generated during the reaction process for subsequent processing. The heating coil is arranged on the outer wall of the reactor to heat the materials in the reactor to the required temperature and promote the progress of the chemical reaction. The heating coil is connected to the heat source to heat the materials by heat conduction.

[0008] Preferably, the outer wall of the reactor is provided with a temperature remote meter a, a liquid level meter a, and a temperature remote meter b. The safety valve is used to automatically open when the pressure in the reactor exceeds the set value to release excess pressure and prevent the equipment from overpressure. The bursting disc serves as the last safety barrier and ruptures in extreme cases (such as safety valve failure) to ensure the safety of the equipment. The two together constitute an overpressure protection system.

[0009] Preferably, a stirring shaft is provided inside the reactor, and the stirring shaft is connected to a stirrer.

[0010] Preferably, the agitator is provided with a circulating water inlet pipe and a circulating water outlet pipe. The liquid alkali feed pipe and the liquid alkali feed valve are used to add liquid alkali and other regulators into the reactor to control the reaction conditions. The liquid alkali feed valve controls the amount of liquid alkali added to ensure that the reaction proceeds according to the predetermined conditions. In conjunction with the safety valve, the liquid alkali feed can be automatically cut off in an emergency to prevent the situation from deteriorating.

[0011] Preferably, a threaded ball valve is provided on the circulating water outlet pipe.

[0012] Preferably, a bottom valve is provided at the bottom of the reactor.

[0013] Preferably, a liquid level meter b is provided on the flushing buffer tank.

[0014] Preferably, a tail gas absorption device is connected to the top of the charging buffer tank.

[0015] Specifically, for the epoxy resin safety production device, first, caustic soda is added through the caustic soda feed pipe and the reaction kettle is adjusted. At the same time, the heating coil heats the reaction kettle to an appropriate temperature. The stirring shaft drives the stirrer to rotate, mixing the materials and promoting the reaction. When the reaction pressure is too high and unstable, first, the safety valve and the caustic soda feed valve are linked to cut off the entry of caustic soda. After the adjustment fails, the rupture disc is continued to protect the stable progress of the reaction. The excess tail gas is absorbed by the tail gas absorption device, and the flushed liquid enters the charging buffer tank. After the pre-condensate reaches a certain liquid level, it is pumped into the reaction kettle to continue participating in the reaction. Throughout the process, the safety valve and the rupture disc provide overpressure protection to ensure production safety.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] (1) For the epoxy resin safety production device of the present utility model, by integrating a safety valve, a rupture disc and a tail gas absorption device, it comprehensively prevents and responds to overpressure and harmful gas emissions, providing multiple safety guarantees for operators and equipment, and ensuring the stable progress of the reaction.

[0018] (2) For the epoxy resin safety production device of the present utility model, it precisely controls the caustic soda feeding and heating processes to ensure stable reaction conditions. At the same time, the effective mixing of the stirrer improves the reaction efficiency and product quality, thereby optimizing the overall production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the epoxy resin safety production device of the present utility model.

[0020] In the figure: 1. Reaction kettle; 2. Charging buffer tank; 3. Tail gas absorption device; 4. Heating coil; 5. Remote temperature gauge a; 6. Caustic soda feed pipe; 7. Caustic soda feed valve; 8. Circulating water inlet pipe; 9. Circulating water outlet pipe; 10. Threaded ball valve; 11. Safety valve; 12. Rupture disc; 13. Stirrer; 14. Stirring shaft; 15. Liquid level gauge a; 16. Remote temperature gauge b; 17. Bottom valve; 18. Liquid level gauge b; 19. Cooling coil. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The present utility model will be further described below with reference to specific embodiments.

[0022] Such as Figure 1As shown, the epoxy resin production safety device comprises a reactor 1 and a material buffer tank 2. The reactor 1 is connected to the material buffer tank 2, and a safety valve 11 and a bursting disc 12 are sequentially arranged on the connecting pipeline. The liquid outlet at the bottom of the material buffer tank 2 is connected to the reactor 1. The reactor 1 is provided with a liquid alkali feed pipe 6, and a liquid alkali feed valve 7 is arranged on the liquid alkali feed pipe 6. The liquid alkali feed valve 7 is linked to the safety valve 11. A cooling coil 19 is arranged on the outer wall of the material buffer tank 2. The cooling coil 19 is arranged on the outer wall of the material buffer tank 2 to cool the material in the tank to prevent the temperature from being too high to cause a safety accident or affect the material properties. The heat transfer and dissipation are achieved by circulating a cooling medium (such as water or coolant) through the coil.

[0023] Preferably, a heating coil 4 is provided on the outer wall of the reactor 1. The reactor 1 is used as the main reaction vessel in the epoxy resin production process to mix, heat and stir the reactants so that the epoxy resin raw materials undergo a chemical reaction under specific conditions to generate the desired epoxy resin product. The material buffer tank 2 plays a buffering role in the reactor 1 to prevent the instantaneous high pressure or material rushing phenomenon that may be generated during the reaction process from directly impacting subsequent equipment, thereby ensuring production safety. At the same time, it can also collect and temporarily store by-products or incompletely reacted materials generated during the reaction process for subsequent processing. The heating coil 4 is arranged on the outer wall of the reactor 1 to heat the materials in the reactor 1 to the required temperature and promote the progress of the chemical reaction. The heating coil 4 is connected to the heat source to heat the materials by heat conduction.

[0024] The outer wall of the reactor 1 is provided with a temperature remote meter a5, a liquid level meter a15, and a temperature remote meter b16. The safety valve 11 is used to automatically open when the pressure in the reactor 1 exceeds the set value to release excess pressure and prevent the equipment from overpressure. The bursting disc 12 is the last safety barrier and ruptures in extreme cases (such as failure of the safety valve 11) to ensure the safety of the equipment. The two together constitute an overpressure protection system.

[0025] The reactor 1 is provided with a stirring shaft 14 inside, and the stirring shaft 14 is connected with a stirrer 13 .

[0026] The stirrer 13 is provided with a circulating water inlet pipe 8 and a circulating water outlet pipe 9. The liquid alkali feed pipe 6 and the liquid alkali feed valve 7 are used to add liquid alkali and other regulators into the reactor 1 to control the reaction conditions. The liquid alkali feed valve 7 controls the amount of liquid alkali added to ensure that the reaction proceeds according to the predetermined conditions. It is linked with the safety valve 11 to automatically cut off the liquid alkali feed in an emergency to prevent the situation from deteriorating.

[0027] The circulating water outlet pipe 9 is provided with a threaded ball valve 10 .

[0028] A bottom valve 17 is provided at the bottom of the reactor 1 .

[0029] A liquid level gauge b18 is provided on the charging buffer tank 2 described above.

[0030] The top of the charging buffer tank 2 is connected with a tail gas absorption device 3.

[0031] The cooling coil 19 is arranged on the outer wall of the charging buffer tank 2 and is used to cool the materials in the tank to prevent safety accidents caused by excessive temperature or affecting the properties of the materials. By circulating a cooling medium (such as water or coolant) through the coil, the transfer and dissipation of heat are realized. The heating coil 4 is arranged on the outer wall of the reaction kettle 1 and is used to heat the materials in the reaction kettle 1 to the required temperature to promote the progress of the chemical reaction. The temperature remote transmitter a5, the liquid level gauge a15, and the temperature remote transmitter b16 are used to monitor key parameters such as the temperature and liquid level in the reaction kettle in real time and transmit the data to the control system or display device, so that the operator can timely understand the production status, adjust the process parameters, and ensure the stability and safety of the production process. The stirring shaft 14 is connected with the stirrer 13 and rotates in the reaction kettle 1 to drive the stirrer 13 to stir the materials, making the materials mix evenly, accelerating the reaction process, and improving the product quality.

[0032] The circulating water inlet pipe 8 and the circulating water outlet pipe 9 are used to supply cooling water to the stirrer to prevent the stirrer from overheating and being damaged due to heat generated by friction during the stirring process. The cooling water enters the stirrer through the inlet pipe, absorbs heat and then is discharged through the outlet pipe to form a cycle.

[0033] The screw ball valve 10 is arranged on the circulating water outlet pipe and is used to control the discharge flow of the cooling water to ensure that the stirrer is properly cooled and is also convenient for the maintenance and replacement of the cooling water pipeline.

[0034] The bottom valve 17 is arranged at the bottom of the reaction kettle 1 and is used to control the discharge of the materials after the reaction ends. By opening the bottom valve, the materials in the reaction kettle can be discharged to the subsequent processing equipment or collection container. The liquid level gauge b18 is arranged on the charging buffer tank 2 and is used to monitor the liquid level of the materials in the tank in real time to ensure that the charging buffer tank operates within a safe range and avoid material overflow or dry burning. The tail gas absorption device 3 is connected to the top of the charging buffer tank and is used to absorb and process the tail gas generated during the production process, reduce the emission of harmful gases, and protect the environment and the health of personnel. The tail gas absorption device usually contains an absorption liquid and a corresponding treatment mechanism to effectively remove harmful substances in the tail gas.

[0035] The described epoxy resin safety production device adds liquid caustic soda through the liquid caustic soda feed pipe 6 and adjusts the reaction kettle 1. At the same time, the heating coil 4 heats the reaction kettle to an appropriate temperature. The stirring shaft 14 drives the stirrer 13 to rotate, mixing the materials and promoting the reaction. When the reaction pressure is too high and unstable, first, the safety valve 11 and the liquid caustic soda feed valve 7 are linked to cut off the entry of liquid caustic soda. After the adjustment fails, the rupture disk 12 is continued to be used to protect the stable progress of the reaction. The excess tail gas is absorbed by the tail gas absorption device 3, and the flushing liquid enters the flushing buffer tank 2. After the pre-condensate reaches a certain liquid level, it is pumped into the reaction kettle 1 to continue participating in the reaction. During the whole process, the safety valve and the rupture disk provide overpressure protection to ensure production safety.

[0036] Of course, the above content is only the preferred embodiment of the present invention and cannot be considered as limiting the scope of the embodiments of the present invention. The present invention is not limited to the above examples either. Equivalent changes and improvements made by those of ordinary skill in the art within the essence of the present invention shall fall within the scope covered by the patent of the present invention.

Claims

1. An epoxy resin safety production device, characterized in that: The invention comprises a reaction kettle (1) and a material buffer tank (2), wherein the reaction kettle (1) is connected to the material buffer tank (2), and a safety valve (11) and a bursting disc (12) are sequentially arranged on the connecting pipeline, the liquid outlet at the bottom of the material buffer tank (2) is connected to the reaction kettle (1), the reaction kettle (1) is provided with a liquid alkali feed pipe (6), the liquid alkali feed pipe (6) is provided with a liquid alkali feed valve (7), the liquid alkali feed valve (7) is linked to the safety valve (11), and a cooling coil (19) is arranged on the outer wall of the material buffer tank (2).

2. The epoxy resin production safety device according to claim 1, characterized in that: A heating coil (4) is arranged on the outer wall of the reaction kettle (1).

3. The epoxy resin production safety device according to claim 1, characterized in that: The outer wall of the reaction kettle (1) is provided with a temperature remote transmission meter a (5), a liquid level meter a (15), and a temperature remote transmission meter b (16).

4. The epoxy resin safety production device according to claim 1, characterized in that: The reactor (1) is provided with a stirring shaft (14) inside, and the stirring shaft (14) is connected to a stirrer (13).

5. The epoxy resin safety production device according to claim 4, characterized in that: The stirrer (13) is provided with a circulating water inlet pipe (8) and a circulating water outlet pipe (9).

6. The epoxy resin safety production device according to claim 5, characterized in that: A threaded ball valve (10) is provided on the circulating water outlet pipe (9).

7. The epoxy resin safety production device according to claim 1, characterized in that: A bottom valve (17) is provided at the bottom of the reaction kettle (1).

8. The epoxy resin safety production device according to claim 1, characterized in that: The punching buffer tank (2) is provided with a liquid level meter b (18).

9. The epoxy resin production safety device according to claim 1, characterized in that: The top of the punching buffer tank (2) is connected to a tail gas absorption device (3).

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