Method of experimental equipment for discharging polyethylene slurry

Abstract

The invention relates to experimental equipment for discharging polyethylene slurry. The experimental equipment comprises a polymerization reaction kettle for storing the polyethylene slurry; a discharging tank which is connected with the polymerization reaction kettle through a feeding pipe, wherein a first valve is mounted on the feeding pipe; a flash tank, wherein the discharging tank is connected with the flash tank through a discharging pipe, and a second valve is installed on the discharging pipe; one end, far away from the polymerization reaction kettle, of each of the feeding pipe andthe discharging pipe extends downwards in an inclined manner; when the first valve is opened, polyethylene slurry is conveyed into the discharging tank by the polymerization reaction kettle under theaction of pressure difference or / and liquid level difference; and when the second valve is opened, the discharge tank conveys the polyethylene slurry into the flash tank under the action of pressure difference or / and liquid level difference. The discharging tank is arranged between the first valve and the second valve, liquid filling and discharging circulation operation is conducted on the discharging tank by switching on and off of the first valve and the second valve, and continuous discharging of slurry in the reaction kettle can be achieved.

Description

technical field [0001] The invention relates to the technical field of polyethylene, in particular to a polyethylene reactor slurry discharge experimental equipment and method of a polyethylene continuous reaction test device. Background technique [0002] The test device is mainly responsible for the development of high-end product technology, while carrying out the development of a series of cutting-edge fields such as catalyst research and development, and improving the research and development progress. Usually, the operating conditions of the test device (such as temperature, pressure, process, liquid level, etc.) should match the production device, but due to its particularity (such as the proportional decrease in flow rate), some instrument equipment cannot be selected or Therefore, some new control modes and methods need to be developed. [0003] The polyethylene reactor slurry discharge equipment of the polyethylene continuous reaction device, the polyethylene reac...

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Problems solved by technology

Usually, the operating conditions of the test device (such as temperature, pressure, process, liquid level, etc.) should match the production device, but due to its particularity (such as the proportional decrease in flow rate), some instrument equipment cannot be selected or use, which requires the development of some new control modes and methods

[0003] The polyethylene reactor slurry discharge equipment of the polyethylene continuous reaction device, the polyethylene reactor slurry contains about 30% (mass fraction) of polyethylene powder, and the particle diameter distribution is 100-500μm, accounting for 85%. If the test device adopts industrial production The discharge method in the device is controlled. In order to prevent the solid particles in the slurry from settling, a certain flow rate needs to be met, which leads to a relatively small diameter of the pipe, which is about 10mm, which makes it impossible to select the discharge valve; if using For conventional regulating valves, when the slurry passes through the narrow gap between the valve seat and the valve core, the large particles and flocs in the slurry may get stuck in the channel, and the solid particles accumulate more and more, thus blocking the entire valve , so that the material in the kettle cannot be discharged, resulting in an accident

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