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A kind of filling device and filling method for the catalyst of tubular fixed-bed reactor

A technology for fixed bed reactors and filling devices, which is applied in the fields of chemical instruments and methods, chemical/physical processes, etc., and can solve problems such as failure to meet the requirements of tube filling, health hazards of filling personnel, and long filling time, and achieve easy cleaning and Maintenance, convenient transportation and carrying, and easy operation

Inactive Publication Date: 2017-05-10
HAO HUA CHENGDU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, about 2%-5% of the tubes cannot meet the requirements and need to be reworked
Catalyst filling is an intensive, long-time, and mechanically repetitive work. Keeping a filling posture for a long time makes workers easily fatigued.
At the same time, because the catalyst contains toxic substances, the dust of the catalyst will also cause harm to the health of the filling personnel.
Because the filling time is relatively long, the larger the reactor, the more difficult the construction period is to predict

Method used

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  • A kind of filling device and filling method for the catalyst of tubular fixed-bed reactor
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  • A kind of filling device and filling method for the catalyst of tubular fixed-bed reactor

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Embodiment 1

[0028] A chemical company in Hebei uses methanol to prepare methyl formate. There is one tubular fixed-bed reactor with 5042 tubes. The fourth catalyst replacement in 2012 was: 16 skilled workers on site, working 12 hours a day, and the filling time was three days because the temperature on site was below zero. Among them, 8 people loaded the catalyst on the reactor, 4 workers were screening the catalyst, and 4 workers transported the screened catalyst to the reactor. After filling, 29 reaction tubes did not reach the filling capacity. After the on-site technicians used a high-power vacuum cleaner to suck out and refill, there were still 3 reaction tubes that did not meet the standard, and the reaction tubes were permanently sealed.

[0029] The fifth catalyst replacement in 2014:

[0030] Carry out catalyst loading according to the loading device for the catalyst of the tubular fixed bed reactor described in the embodiment, the plant site engineer calculates that each addit...

Embodiment 2

[0032] A chemical company in Sichuan uses synthesis gas to produce methanol. There are 2 tubular fixed-bed reactors, each with 14,760 tubes.

[0033] The third catalyst replacement in 2010 was: 40 skilled workers on site, two reactors were filled at the same time, working 12 hours a day, and the filling time was ten days. Among them, 20 people loaded the catalyst on the reactor, 8 workers were screening the catalyst, and 12 workers transported the screened catalyst to the reactor. After filling, more than 70 reaction tubes did not reach the filling capacity. After the on-site technicians used a high-power vacuum cleaner to suck out and refill, all of them met the standard.

[0034] The fourth catalyst replacement in 2014:

[0035] Carry out catalyst loading according to the loading device for the catalyst of the tubular fixed bed reactor described in the embodiment, the site engineer calculates that each addition amount is 6L catalyst, after adjusting the parameters, adopt ...

Embodiment 3

[0037] A chemical company in Shandong uses methanol to produce hydrogen. There are 4 tubular fixed-bed reactors, of which 2 reactors have 1920 tubes, and the other 2 reactors have 4721 and 4765 tubes respectively. .

[0038] In 2011, the catalyst was replaced for the first time: 42 on-site workers filled the two reactors at the same time, working 12 hours a day, and the filling time was 15 days in total. Among them, 22 people loaded the catalyst on the reactor, 8 workers were screening the catalyst, and 12 workers transported the screened catalyst to the reactor. After filling, there were 122 reaction tubes that did not reach the filling capacity. The on-site technicians used a high-power vacuum cleaner to suck out and refill, and permanently sealed the 13 reaction tubes.

[0039] The second catalyst replacement in 2014:

[0040] Carry out catalyst loading according to the loading device for the catalyst of the tubular fixed-bed reactor described in the embodiment, the site...

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Abstract

The invention belongs to the field of catalysts in the chemical field, and relates to a catalyst filing method, in particular to a filling device and a filling method for tubular fixed bed reactor catalysts. The filling device comprises three parts including a conveying device, a split charging device and a feeding device, wherein the catalysts are conveyed to a material storage hopper of the split charging device from the ground by the conveying device; a conveying belt is formed by a sieve screen; a material groove is formed under the conveying belt; the catalysts are conveyed to the feeding device through a catheter in the split charging device. The automatic split charging and oscillation filling mode is adopted in the device, so that the filling precision and the filling reliability are improved; the work intensity of workers in sites can be reduced; the contact of in-site workers and the catalysts is reduced; the health problem brought by the catalysts is avoided; the catalyst filling time can be calculated; the former and later production link connection is convenient; the automation degree of equipment is high; the structure is simple; the cleaning and the repair are easy; the disassembly can be realized, so that the transportation and the carrying are convenient.

Description

technical field [0001] The invention belongs to the field of catalysts in the chemical field, and relates to a catalyst filling method, in particular to a filling device and a filling method for a catalyst in a tubular fixed-bed reactor. Background technique [0002] The use of catalysts directly affects the quality and yield of products, and even safe production. Catalyst loading is a routine operation in chemical product production during catalyst replacement. One of the reasons for improper use of the catalyst is improper catalyst loading. Improper catalyst loading makes the gas flow distribution in the catalyst bed uneven, resulting in obvious differences in the heat release and heat transfer rate of each reaction tube, resulting in changes in the reaction temperature of each tube, and in severe cases localized Overheating, catalyst deactivation. [0003] Tubular reactors are widely used in the chemical industry. At present, the number of large reactor tubes in China h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J8/06
Inventor 邹鑫徐晓峰
Owner HAO HUA CHENGDU TECH