PVC polymerization kettle stirring dragging method

Abstract

The invention discloses a PVC polymerization kettle stirring dragging method, which is characterized in that a traditional PVC polymerization first order load device is changed for a steam driven steam turbine, supply and drainage pump key equipments in polymerization kettle stirring and water circulating system can be dragged by a steam turbine to obtain the power, namely the steam turbine drags the polymerization kettle for stirring and provides the kinetic energy for a circulating water supply pump. The PVC polymerization kettle stirring dragging method can effectively make up the defect that the PVC polymerization kettle stirring device is traditionally depended on the electric energy, hidden trouble generated by power-lossing of PVC polymerization can be solved, surplus steam can be used in a reasonable mode, the consumption of the electric energy is reduced, and the polymerization apparatus safety, continuous development and long-time cycle operation can be effectively promoted.

Description

technical field [0001] The invention relates to a stirring and dragging method for a PVC polymerization kettle. Background technique [0002] In the prior art, with the gradual expansion of the production scale of PVC resin, the number of key production equipment polymerization kettles increases, the capacity of each kettle increases, and the monomers fed into it increase, so the number of losses in the event of an accident is relatively large. It is more difficult to deal with afterwards. The production continuity of PVC in the prior art is strong, and the raw materials and intermediate products are mostly flammable and explosive materials, while the production reaction of PVC resin is a chain reaction, and the heat release continues during the reaction process, and high temperature and high pressure are generated during normal production. The failure of electrical switch and power failure will directly lead to the failure of stirring and the abnormal supply of circulating...

AI Technical Summary

Problems solved by technology

However, once the power failure situation occurs, the stirring in the kettle stops, and even if a terminator is put into the control reaction, such as using NO gas as a reaction emergency terminator in a kind of PVC polymerization kettle failure emergency treatment method disclosed by CN102702396A, the heat of reaction cannot be obtained in time and effectively. Diffusion, the resin precipitates at the bottom of the polymerization kettle, which may block the discharge hole and affect emergency operations such as unloading and pouring the kettle

In order to prevent accidental power loss, it is necessary to ensure dual power supply to ensure production. The investment in equipment is large, and it is difficult to realize the dual-circuit power supply of new installations.

After the power failure occurs, put in the security power supply to realize the operation of the first-level load equipment. When all kinds of equipment are started at the same time, the security power supply will trip due to overload. At this time, the polymerization kettle is difficult to control

In production, there may be emergencies without any predictive power signal. In extreme cases, it is especially important to take effective measures or control the emptying of the polymerizer. The emptying operation will pollute the environment and cause adverse effects and economic losses.