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Correct operation of resin reactor and its precautions
Apr 05, 2019

In real life, the utilization rate of various resins is also high, and the resin polycondensation reaction is carried out in a resin reactor of a certain temperature and pressure. In order to avoid sticking of the resin reactor during use, it is necessary to operate correctly to avoid economic loss as much as possible.


Because the sulfate content in urea is too high, when urea is added in the late stage of the polycondensation reaction of the resin, it is equivalent to adding a curing agent to promote the rapid crosslinking of the resin into a network structure. If the treatment is not timely, the resin is cured in the reaction. In the kettle, therefore, standard industrial urea raw materials should be used in the production of the resin reactor to limit the sulfate content in the urea to 0.01% or less.


The degree of balance of the operation of the resin reactor also affects the use effect, so in the production operation, it should be slowly pressurized and heated. Generally, the water vapor of about 0.15 MPa is kept for 2 to 3 minutes, and then the pressure is gradually raised, and the lifting speed is preferably 0.1 to 0.15 MPa per minute.


Therefore, both heating and cooling should be carried out within a reasonable temperature difference. Generally, the steam use temperature should be less than 180 °C, the thermal shock should be less than 120 °C, and the cooling shock should be less than 90 °C. At the same time, care should be taken to determine the appropriate inlet and outlet temperatures of the cooling medium to maintain a balanced operation. The temperature and time of the resin polycondensation reaction should be properly controlled during the operation, and the reaction should be terminated in time. Generally, the temperature of the reaction solution should be controlled within ~95 °C to avoid the occurrence of sticking of the resin reaction

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