Multistage insulation fixed bed reactor

An adiabatic fixed bed and reactor technology, applied in chemical instruments and methods, chemical/physical processes, etc., can solve problems affecting catalyst utilization, selectivity and conversion rate, uneven mixing of two materials between sections, and bed fluid. Uneven distribution, etc., to achieve the effect of simple structure, good current equalization effect and convenient installation

Active Publication Date: 2008-03-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that in the multi-stage adiabatic fixed-bed reactor of the prior art, there are uneven distribution of bed fluid and uneven mixing of two streams of materials between stages or a long mixing distance, which affects catalyst utilization and selectivity. Conversion rate problem, providing a new method for multi-stage layered adiabatic fixed-bed reactor

Method used

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Examples

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Embodiment 1

[0022] The gas-phase alkylation of benzene and ethylene molecular sieves to produce ethylbenzene adopts a six-stage adiabatic fixed-bed reactor as shown in Figure 1, the reactor diameter D=600 mm, and the interstage fluid shown in Figure 2 and Figure 3 is arranged in the reactor Distributor and inlet fluid predistributor. Inlet fluid pre-distributor cylinder diameter D = 138 mm, lateral annular gap height h = 40 mm, annular baffle height h 1 = 25 mm, the diameter of the bottom sieve plate d = 50 mm, the diameter of the sieve hole on the bottom sieve plate Φ 1 = 8mm, the diameter of the sieve hole on the side wall sieve plate Φ 2 = 10 mm, sidewall sieve plate angle α = 30°, the ratio of the area of ​​the bottom sieve plate to the area of ​​the lateral annulus is 11.3%, and the ratio of the diameter of the bottom sieve plate to the diameter of the distributor’s cylindrical shell is 36.2 %, the opening rate of the sieve hole on the bottom sieve plate is 26.5%, the opening rate ...

Embodiment 2

[0025] The gas-phase alkylation of benzene and ethylene molecular sieves to produce ethylbenzene adopts a six-stage adiabatic fixed-bed reactor as shown in Figure 1, the reactor diameter D=1000 mm, and the interstage fluid shown in Figure 2 and Figure 3 is arranged in the reactor Distributor and inlet fluid predistributor. Inlet fluid pre-distributor cylinder diameter D = 158 mm, lateral annular gap height h = 50 mm, annular baffle height h 1 = 25 mm, the diameter of the bottom sieve plate d = 60 mm, the diameter of the sieve hole on the bottom sieve plate Φ 1 = 8mm, the diameter of the sieve hole on the side wall sieve plate Φ 2 = 8 mm, sidewall sieve plate angle α = 60°, the ratio of the area of ​​the bottom sieve plate to the area of ​​the lateral annulus is 11.4%, and the ratio of the diameter of the bottom sieve plate to the diameter of the distributor’s cylindrical shell is 31.9 %, the opening rate of the sieve hole on the bottom sieve plate is 37.3%, the opening rate ...

Embodiment 3

[0028] The gas-phase alkylation of benzene and ethylene molecular sieves to produce ethylbenzene adopts a six-stage adiabatic fixed-bed reactor as shown in Figure 1, the reactor diameter D=1000 mm, and the interstage fluid shown in Figure 2 and Figure 3 is arranged in the reactor Distributor and inlet fluid predistributor. Inlet fluid pre-distributor cylinder diameter D = 158 mm, lateral annular gap height h = 50 mm, annular baffle height h 1 = 25 mm, the diameter of the bottom sieve plate d = 60 mm, the diameter of the sieve hole on the bottom sieve plate Φ 1 = 8mm, the diameter of the sieve hole on the side wall sieve plate Φ 2 = 8 mm, sidewall sieve plate angle α = 60°, the ratio of the area of ​​the bottom sieve plate to the area of ​​the lateral annulus is 11.4%, and the ratio of the diameter of the bottom sieve plate to the diameter of the distributor’s cylindrical shell is 31.9 %, the opening rate of the sieve hole on the bottom sieve plate is 37.3%, the opening rate ...

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Abstract

The present invention relates to a multistage laminar heat-insulating fixed bed reactor. It is characterized by that in said multistage laminar heat-insulating fixed bed reactor a technical scheme of that utilizing predistributor to treat inlet fluid and utilizing distributor to treat interstage fluid can be adopted so as to make its interlaminar fluid distribution be uniform and make interstage fluid mixing length be shortened.

Description

technical field [0001] The invention relates to a multi-stage adiabatic fixed-bed reactor. In particular, it relates to a multi-stage adiabatic fixed-bed reactor for producing ethylbenzene by vapor-phase alkylation of benzene and ethylene. Background technique [0002] The multi-stage adiabatic fixed-bed reactor has the characteristics of simple structure, convenient operation, and adaptability to large-scale system production, so it has been widely used in petrochemical industry. For a multi-stage adiabatic fixed-bed reactor, a part of the reaction material is fed between the two stages of the catalyst in the reactor. At this time, there are problems of uniform mixing with the material in the previous stage and uniform distribution of the mixed material. The requirement for interstage mixing is to achieve rapid mixing and uniform distribution of the two reaction materials within a limited time and space, so that the materials entering the next stage of the catalyst bed can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/04
Inventor 钟思青杨为民张惠明刘国强
Owner CHINA PETROLEUM & CHEM CORP
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