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Method for filling catalyst in tube type fixed bed reactor

A fixed-bed reactor and catalyst technology, applied in chemical instruments and methods, chemical/physical processes, etc., can solve problems such as uneven loading of catalysts, achieve good loading effect, uniform loading, and easy operation

Active Publication Date: 2015-05-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a catalyst loading method for a tubular fixed-bed reactor to solve the problem of uneven catalyst loading in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Install a blocking spring at the bottom of the reaction tube, and fill the upper part of the blocking spring with a 100mm high Φ3mm ceramic ball to avoid catalyst leakage during the filling process. Weigh 4kg of catalyst, evenly load the catalyst into the reaction tube, and control the rate of rise of the catalyst bed height to 40mm / s. After the catalyst is loaded, the bed pressure drop is measured and the data is recorded.

[0030] The above filling was repeated 20 times, and the bed pressure drop was counted. The statistical results are shown in Table 1.

[0031] Table 1 Example 1 bed pressure drop statistics

[0032] Bed pressure drop deviation

Embodiment 2

[0034] Install a blocking spring at the bottom of the reaction tube, and fill the upper part of the blocking spring with a 100mm high Φ3mm ceramic ball to avoid catalyst leakage during the filling process. Weigh 4kg of catalyst, evenly load the catalyst into the reaction tube, and control the rate of rise of the catalyst bed height to 20mm / s. After the catalyst is loaded, the bed pressure drop is measured and the data is recorded.

[0035] The above filling was repeated 20 times, and the bed pressure drop was counted. The statistical results are shown in Table 2.

[0036] Table 2 Example 2 bed pressure drop statistics

[0037] Bed pressure drop deviation

[0038] It can be seen from Example 1 and Example 2 that the method of the present invention is used for catalyst loading, the uniformity of catalyst loading is better, and the bed pressure drop can be controlled within ±5%.

Embodiment 3

[0040] On the basis of Example 2, the catalyst loading rounds were continued, and the pressure drop of the bed was lower than the average pressure drop of 3% when it was carried out to the 25th time. Another 0.1 kg of catalyst was loaded into the reactor at a constant speed, so that the rate of increase in the height of the catalyst bed was 5 mm / s. After the catalyst replenishment was completed, the pressure drop measurement was carried out. The pressure drop measurement conditions were the same as in Example 2, and the measured pressure drop was 0.5% higher than the average pressure drop.

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PUM

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Abstract

The invention discloses a method for filling a catalyst in a tube type fixed bed reactor. The method comprises the following steps of: (1) mounting a plugging spring at the bottom of each reaction tube; (2) filling the catalyst in each reaction tube from the opening at the top of each reaction tube and controlling the rising velocity of the height of each catalyst bed layer as 10-40 mm / s; (3) measuring the pressure drop of each reaction tube; (4) complementarily filling the catalyst in the reaction tubes with the pressure drop lower than an average pressure drop by 3% and controlling the rising velocity of the heights of the catalyst bed layers with complementary filling as 5-10 mm / s; and (5) detaching the plugging springs of the reaction tubes with the pressure drop higher than the average pressure drop by 8% and discharging the catalyst in the reaction tubes. The method for filling the catalyst in the tube type fixed bed reactor, disclosed by the invention, improves the uniformity of the catalyst filled in the reaction tubes and lowers filling difficulty of the catalyst.

Description

technical field [0001] The invention relates to a catalyst loading method for a tubular fixed-bed reactor. Background technique [0002] For a strongly exothermic reaction system, a tubular fixed-bed reactor is a preferred reactor form. The catalyst loading of the tubular fixed-bed reactor is the key factor affecting the success of the plant. Uneven catalyst loading will cause the raw material flow in the reaction stage, which will cause the reaction effect to deteriorate, and cause the catalyst bed to overheat and stop the operation. In order to make the catalyst loading more uniform, there are the following catalyst loading techniques. [0003] CN1607032A discloses a method for loading catalyst. In the method, during the catalyst filling process, a chain substance is inserted into the reaction tube so that the lower end of the chain substance is higher than the upper end of the catalyst layer. This method can largely avoid the occurrence of "bridging" phenomenon during ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J8/06
Inventor 吴昊胡志海聂红徐润李猛侯朝鹏孙霞
Owner CHINA PETROLEUM & CHEM CORP
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