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Multi-segment insulation fix bed reactor

An adiabatic fixed bed and reactor technology, applied in chemical instruments and methods, chemical/physical processes, etc., can solve problems such as uneven distribution, affecting catalyst utilization, selectivity and conversion rate, and uneven mixing of two materials

Active Publication Date: 2006-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is the problem existing in the prior art that two streams of materials are not evenly mixed or distributed between the stages of a multi-stage adiabatic fixed-bed reactor, which affects the utilization rate, selectivity and conversion rate of the catalyst, and provides a New for multi-stage adiabatic fixed bed reactors

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0020] use as figure 1 The inter-stage gas mixing device shown, the diameter of the reactor D = 600 mm, the diameter of the straight pipe d 1 = 140 mm, the diameter of the sieve plate d 2 = 160 mm, the diameter of the sieve hole on the sieve plate Φ = 6 mm, the height of the straight pipe h 1 = 100 mm, the height h of the lateral annulus channel 2 =65 millimeters, the vertical or horizontal distance 1=450 millimeters of two second kinds of material inlet pipes, the angle α=45 ° of conical body and horizontal position, the vertical or horizontal distance of two second kinds of material inlets and reactor diameter The ratio of the diameter of the straight pipe to the diameter of the reactor is 75%, the ratio of the diameter of the straight pipe to the diameter of the reactor is 23.3%, the ratio of the diameter of the sieve plate to the diameter of the reactor is 26.7%, and the ratio of the opening area of ​​the sieve plate to the area of ​​the lateral annulus is 18.5%. , The ...

Embodiment 2

[0023] use as figure 1 The inter-stage gas mixing device shown, the diameter of the reactor D = 1000 mm, the diameter of the straight pipe d 1 = 168 mm, the diameter of the sieve plate d 2 = 168 mm, the diameter of the sieve hole on the sieve plate Φ = 8 mm, the height of the straight pipe h 1 = 160 mm, the height h of the lateral annulus channel 2 =75 millimeters, the vertical or horizontal distance 1=850 millimeters of two second kinds of material inlet pipes, the angle α=60 ° of conical body and horizontal position, the vertical or horizontal distance of two second kinds of material inlets and reactor diameter The ratio of the diameter of the straight tube to the diameter of the reactor is 85%, the ratio of the diameter of the straight pipe to the diameter of the reactor is 16.8%, the ratio of the diameter of the sieve plate to the diameter of the reactor is 16.8%, and the ratio of the opening area of ​​the sieve plate to the area of ​​the lateral annulus is 25.3%. , The...

Embodiment 3

[0026] use as figure 1 The inter-stage gas mixing device shown, the diameter of the reactor D = 600 mm, the diameter of the straight pipe d 1 = 165 mm, the diameter of the sieve plate d 2 = 165 mm, the diameter of the sieve hole on the sieve plate Φ = 6 mm, the height of the straight pipe h 1 = 120 mm, the height h of the lateral annulus channel 2 =60 millimeters, the vertical or horizontal distance 1=420 millimeters of two second kinds of material inlet pipes, the angle α=30 ° of conical body and horizontal position, the vertical or horizontal distance of two second kinds of material inlets and reactor diameter The ratio of the diameter of the straight pipe to the diameter of the reactor is 70%, the ratio of the diameter of the straight pipe to the diameter of the reactor is 27.5%, the ratio of the diameter of the sieve plate to the diameter of the reactor is 27.5%, and the ratio of the opening area of ​​the sieve plate to the area of ​​the lateral annulus is 12.6%. , The ...

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Abstract

The invention relates to a multistage heat insulating fixed bed reactor which can solve the defect of present one that worse gas mixed function of pipe feed distributor between stages. The invention utilizes an activator bed inside the reactor and a section gas mixed device. Wherein, said section gas mixed device comprises an inlet (9) of first material, a cylinder (4) of reactor; an inlet (6) of second material, a conical body (10), a straight pipe (11), a lateral annular space (12) and a screen plate (13), which can solve aforementioned problem effectively. The invention has the advantages of simple structure, lower pressure drop, fast uniform mixing of two flows of material and uniform material distribution. And it can be used to produce ethylbenzene with benzene and ethane via the process of alkylation, in the industrial production.

Description

technical field [0001] The invention relates to a multi-stage adiabatic fixed-bed reactor. Specifically, it relates to a multi-stage adiabatic fixed-bed reactor used for gas-phase alkylation of benzene and ethylene molecular sieves to produce ethylbenzene. 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 added 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 materia...

Claims

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Application Information

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IPC IPC(8): B01J8/04
Inventor 钟思青杨为民童海颖陈晓峰
Owner CHINA PETROLEUM & CHEM CORP
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