Circulation gas cooler anti-clogging technology for polyethylene prepared by vapor phase method and device

Abstract

The invention relates to a circulation gas cooler anti-clogging technology for polyethylene prepared by a vapor phase method and a device. The invention aims at the problem that fast clogging of the circulation gas cooler of polyethylene prepared by the vapor phase method influences the present situation of the operation period of the device. The circulation gas cooler anti-clogging technology for polyethylene prepared by vapor phase method has the technical scheme by comprising the following steps: 1) connecting a high pressure steel cylinder filled with oxygen to an oxygen feed line, opening the high pressure steel cylinder; 2) performing pressure reduction on oxygen through a pressure reduction apparatus, metering and controlling through a metering controlling device; and 3) injecting the oxygen accurately metered in the step 2) through the oxygen feed line in a stable mode into the circulation gas in the apparatus for preparing polyethylene by the vapor phase method. The device used by the method of the invention comprises the high pressure steel cylinder, the pressure reduction device, the metering controlling device and the oxygen feed line. The technology and the device of the invention solves the problems of fast clogging of the cooler, effectively enhances the operation period of the device, and effectively increases the productivity and the benefit of the device.

Description

technical field [0001] The invention relates to an anti-clogging process of a gas-phase method polyethylene circulating gas cooler, in particular to a technology and a device for preventing the gas-phase method polyethylene circulating gas cooler from being blocked by killing catalyst activity. Background technique [0002] The Unipol process is a low-pressure gas-phase fluidized-bed production device developed by United Carbon Chemical Corporation. When the device uses a chromium-based catalyst with low activity and an induction period for production, the catalyst entrained in the recycle gas continues to react in the recycle gas pipeline. , The product blocks the circulating gas cooler, resulting in a short operating cycle of the device. [0003] Traditional improvement techniques mainly include process control parameter adjustment and catalyst formulation adjustment. The details are as follows: [0004] 1. Process control parameter adjustment technology: reduce the loa...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the current situation that the circulating gas cooler of the gas-phase method polyethylene process is quickly blocked, which affects the operation period of the device, the problem of rapid blockage of the cooler is solved by injecting accurately metered catalyst irreversible poison oxygen into the circulating gas, thereby effectively improving the efficiency of the device. productivity and benefits

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