Fluidized bed reactor and method and device used for detecting temperature in reactor

Abstract

The invention relates to a method used for detecting the temperature in a fluidized bed reactor, wherein the method comprises that: the wall of the reactor (1) is provided with at least one transparent part (5); and an infrared detector (10) is used to permeate the transparent part (5) to detect the temperature of different positions in the reactor (1). The detection method is adopted and can more accurately and intuitively detect the actual conditions of the interior of the fluidized bed reactor (1).

Description

technical field [0001] The invention relates to a method and a device for detecting the temperature in a fluidized bed reactor and to the fluidized bed reactor. Background technique [0002] In the olefin polymerization process, the gas phase polymerization process has the advantages of short process, no need to use solvents, raw materials and low energy consumption, so it develops very rapidly. In the existing gas-phase polymerization process, fluidized-bed gas-phase polymerization reactors equipped with gas distribution plates are widely used. [0003] figure 1 A reactor 1 commonly used in the prior art is shown. Such as figure 1 As shown, reactor 1 is a segmented cylindrical tank with a larger diameter in the upper part. A gas distribution plate 4 is installed on the bottom of the tank to close the bottom of the tank. Reactor 1 has a gas introduction zone 1a below the gas distribution plate 4; a fluidized bed zone (polymerization reaction system) 1b is arranged above...

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Problems solved by technology

[0007] (2) Olefin polymer particles will fuse together to form a block or sheet polymer, and this enlarged particle will descend and deposit at the bottom of the fluidized bed reactor, or stay in the middle, resulting in these localized locations. lower temperature

[0008] (3) When the polymerization reaction is carried out rapidly in a short period of time, the temperature inside the reactor will rise rapidly, resulting in an abnormal speed of the polymerization reaction

Infrared detection will inevitably destroy the insulation layer of the reactor, which makes the outer wall surface for infrared detection not too large, so the area where infrared detection can be carried out is not enough to reflect the situation in the reactor

In addition, the reactors used in industry are installed in the open air, which makes the results of infrared detection inevitably affected by weather factors such as sunlight, temperature, wind, cloud, rain and snow.

[0011] As mentioned above, it is difficult to quickly and accurately detect the temperature in the reactor in the above-mentioned method.

Therefore, it has been difficult to operate the fluidized bed reactor continuously and stably for a long time.

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