Why does the production equipment for reaction kettle grout have wall sticking?

When carrying out production and manufacturing of a variety of chemical raw materials, it is particularly important to focus on the stainless steel plate reaction tank and grout production line equipment, which is a non-standard factory reaction equipment. In terms of production and manufacturing operations, customers are required to be very cautious. Due to poor operation, production and manufacturing may be terminated in one go. Very sticky wall condition.

During the production and manufacturing of the equipment kettle of the reaction tank grout production line, there may be a situation of sticking to the wall. When accumulated, it will seriously endanger the operation of the reaction tank. Therefore, it is stipulated that everyone must operate appropriately when applying to prevent wall sticking. However, there are also some processing elements that cause wall sticking that cannot be prevented. Next, let me give you an overview: These 4 points can cause wall sticking in the equipment of the stainless steel plate reaction tank and grout production line.

1. Raw material elements

Due to the high content of potassium thiocyanate in urea, adding urea in the middle and later stages of the epoxy resin condensation reaction is equivalent to adding an epoxy curing agent, which promotes the rapid chemical cross-linking of the epoxy resin into a porous structure. If not solved immediately, the epoxy resin will dry and solidify in the reaction tank sealant production line equipment. Therefore, standardized industrial grade urea raw materials should be used in production and manufacturing to limit the potassium thiocyanate content in urea to below 0.01%.

2. Balance level of operation

When the temperature, working pressure, and other indicators of the adhesive processing technology are unstable or fluctuate too much, the epoxy resin condensation reaction process is uneven, which can easily lead to wall sticking. Therefore, in production and manufacturing operations, slow charging and heating should be carried out. Generally, about 0.15Mpa of steam is introduced and maintained for 2-3 minutes before slowly increasing the pressure and temperature. It is advisable to increase the rate by 0.1-0.15Mpa per minute.

3. Temperature difference of kettle wall

The temperature of the refrigerant is too low or suddenly drops, causing a large temperature difference between the kettle wall and the raw material, resulting in the adhesive sticking to the kettle wall of the stainless steel plate reaction tank and the sealing agent production line equipment. Therefore, both heating and cooling should be carried out within the effective temperature difference range. Generally, the application temperature of steam should be below 180 ℃, the temperature difference thermal shock should be below 120 ℃, and the cooling shock should be below 90 ℃. In addition, attention should be paid to specifying the suitable inlet and outlet temperatures of the refrigerant to maintain stable operation.

4. Reflect temperature and time

When the temperature of the reaction solution is less than 80 ℃, if ammonia chloride is used as a metal catalyst, the reaction rate and pH value information cannot be displayed. After the temperature rises, the pH value rapidly decreases, the reaction time accelerates, and the condensation reaction becomes too intense, leading to suspicion of glue and wall sticking. In addition, if the condensation reaction time is too long, the content of epoxy resin is high, and the viscosity is too high, it is easy to cause wall sticking. Therefore, the temperature and time of the condensation reaction should be appropriately controlled during operation, and the reaction should be stopped immediately. It is generally advisable to control the liquid temperature within 0-95 ℃.