Constant temperature control device and method for floating end bearing of gas-phase method polypropylene process reactor

Abstract

The invention provides a constant temperature control device and method for a floating end bearing of a gas-phase polypropylene process reactor; the constant temperature control device comprises a constant temperature protective device arranged in the floating end of the reactor; the inside of a small space isolated relatively in the constant temperature protective device is filled with heat-dissipating propylene via a gas propylene circular nozzle and a liquid propylene linear nozzle for the purpose of control, and it is ensured that a floating end bearing block and bearing have relatively constant temperature in the constant temperature protective device. By applying the constant temperature control device and method where operating ambient temperature of the floating end bearing block and bearing is controlled to optimal operating temperature of the bearing and lubricant, too high operating ambient temperature of the floating end bearing of the reactor is avoided, stable running of the gas-phase polypropylene process reactor can be achieved, shutdown times due to floating end bearing damage are decreased, and economic benefit is increased. The constant temperature control device is stationary, having the advantages of low investment, good convenience of implementation, low operation and maintenance costs and the like; the constant temperature control device and method have high reliability and economy.

Description

technical field [0001] The invention relates to constant temperature control of a floating end bearing of a gas-phase process polypropylene process reactor, in particular to a constant temperature control device and method for a floating end bearing of a gas-phase process polypropylene process reactor. Background technique [0002] The main feature of the INEOS gas phase polypropylene process currently used in China is the use of a horizontal stirred bed reactor close to plug flow. In the actual production and operation process, the temperature of the bearing at the floating end of the reactor agitator is often high and cannot be effectively controlled. Too high temperature will cause the grease to deteriorate, and the bearing cannot work at the best ambient temperature, which greatly reduces the service life of the bearing, and may even cause the bearing to be damaged in a short period of time due to the high temperature and be forced to stop, affecting the long-term stable...

AI Technical Summary

Problems solved by technology

However, when the medium-pressure nitrogen is purged to cool down, too much nitrogen entering the reactor will lead to an increase in the gas-phase inert components inside the reactor, affecting the polymerization activity and even increasing the consumption of raw and auxiliary materials. The temperature does not achieve the expected cooling effect

[0006] 3) After the long-term operation of the device, the non-deactivated components brought into the floating end space through the pressure balance line form polypropylene powder and accumulate over time, surrounding and covering the bearing seat, and even filling the entire space of the floating end and forming a compaction. At this time The effect of reducing the temperature of the bearing seat and bearing cannot be achieved by the traditional method of introducing nitrogen to cool down, and even the frictional heat generated by the rotation of the bearing cannot be dissipated

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