Reaction kettle for producing polyester resin

Abstract

The invention provides a reaction kettle for polyester resin production, which is applied to the technical field of polyester resin production, when the difference between the pressure in a reaction kettle body (1) of the reaction kettle for polyester resin production and the pressure of the top of a tower column (2) exceeds 0.025 mpa, one regulating valve is regulated to a closed state, and the other regulating valve is regulated to an open state, so that the pressure in the tower column (2) is regulated to a closed state; when the pressure of the reaction kettle gradually returns to zero, the opening degree of the regulating valve in the open state is 30%, the opening degree of the regulating valve in the open state is gradually increased to 100% from 30%, the opening degree of the regulating valve in the closed state is also gradually increased to 100% from zero, and when the pressure of the reaction kettle gradually returns to zero, the opening degrees of the regulating valve I (3) and the regulating valve II (4) are both opened to 100%. According to the reaction kettle for polyester resin production, normal heating operation of the reaction kettle body can be ensured, operation such as cooling is not needed, the phenomenon that the tower column is blocked by material ejection caused by unbalanced pressure of the reaction kettle body and the tower column is avoided, and the operation safety is improved.

Description

technical field [0001] The invention belongs to the technical field of polyester resin production, and more specifically relates to a reaction kettle for polyester resin production. Background technique [0002] In the production process of polyester resin, due to the characteristics of some polyester resin models, especially after a large amount of adipic acid is put into the late stage of production, when the temperature starts to rise, there will be positive pressure in the reactor body and the pressure will continue to rise, and the pressure will continue from 0.001mpa Will rise to 0.050mpa, or even higher. Since the end of the current workshop process, that is, the end of the reactor tail gas pipeline, is connected to the incinerator pipe, the incinerator uses a fan to suck away all the tail gas synthesized by the workshop for incineration. Due to the continuous positive pressure inside the reactor body during this process stage, The incinerator tail gas pipeline is al...

AI Technical Summary

Problems solved by technology

Since the end of the current workshop process, that is, the end of the reactor tail gas pipeline, is connected to the incinerator pipe, the incinerator uses a fan to suck away all the tail gas synthesized by the workshop for incineration. Due to the continuous positive pressure inside the reactor body during this process stage, The incinerator tail gas pipeline is always under negative pressure, so that the positive pressure gas flows to the negative pressure place, and the materials in the reactor body also rush into the tower column with the gas, causing serious quality and safety accidents that the tower column is blocked

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