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Heat medium annular distributor with guiding blade for improving flow distribution

A technology of guide vanes and distributors, applied in the direction of indirect heat exchangers, heat exchanger types, chemical instruments and methods, etc.

Active Publication Date: 2011-06-29
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, only by adjusting the number and size of the slit openings of the annular distributor in the reactor or heat exchanger, it is impossible to effectively improve the heat medium supplied to the annular distributor in order to improve the local heat transfer efficiency to a desired value. ground distribution

Method used

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  • Heat medium annular distributor with guiding blade for improving flow distribution
  • Heat medium annular distributor with guiding blade for improving flow distribution
  • Heat medium annular distributor with guiding blade for improving flow distribution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0140] like Figure 4 As shown, an annular distributor with an annular slit layer and first type guide vanes and a reactor with the same annular distributor were fabricated. The annular distributor and reactor were set to meet the following dimensions.

[0141] Ring distributor width 520:400mm

[0142] Ring distributor height 510:600mm

[0143] Annular slit layer: single slit layer

[0144] Number of slits: 60

[0145] Width of each slit: 72.43mm

[0146] Height of each slit: 300mm

[0147] The starting point of the first type guide vane (the end of the first vertical baffle is in the direction of the outer circumference): 1000mm from the inner circumference to the outer circumference

[0148] The height of the first type guide vane: 600mm (same height as the annular distributor)

[0149] Number of guide vanes of the first type: 4

[0150] Shut-off plate: 1, relative to the central axis of the opening

[0151] Reactor diameter: 4150mm

Embodiment 1

[0153] Except for the first type guide vane and shut-off plate, the annular distributor and reactor are manufactured with the same specifications as in Example 1.

[0154] Experiment 1: Measurement of flow distribution in an annular distributor

[0155] During the catalytic gas phase oxidation in the reactor manufactured according to Example 1 and Comparative Example 1, the flow distribution of the heat medium according to the slit was measured, and the results were as follows Figure 18 shown.

[0156] refer to Figure 18 , in the annular distributor equipped with the first type guide vanes of the present invention (Example 1), the flow rate of the heat medium is basically uniform and there is no significant difference due to the position of the slit. On the contrary, in the annular distributor without the first type guide vanes (comparative example 1), the flow rate of some slits (slot numbers 25 to 36) provided adjacent to the heat medium supply duct showed a decrease due...

Embodiment 2

[0159] like Figure 7 The shown annular distributor with slotted layers and guide vanes of the second type and a reactor with the same annular distributor were fabricated. The annular distributor and reactor were set to meet the following dimensions.

[0160] The diameter of the slit layer: 4150mm

[0161] The height of the slit layer: 300mm

[0162] The width of the slit in the slit layer: 72.43mm

[0163] Distribution of slits in the slit layer: 6° (the angle is defined by two adjacent slits relative to the center of the slit layer circle)

[0164] The width of the duct of the ring distributor: 400mm

[0165] The shape of the second type guide vane: triangular prism

[0166] The length of the second type guide vane: 1000mm

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Abstract

Disclosed is an annular distributor having: an annular slit layer that is mounted on an inner circumferential surface of the annular distributor and has at least one slit discharging or introducing a fluid; at least one opening that is formed on an outer circumferential surface of the annular distributor and is connected with any one of a fluid supply duct and a fluid discharge duct; and at leastone guide vane selected from three types of guide vanes that are installed in the annular distributor, and splits a flow rate of the fluid supplied from the duct or collects a flow rate of the fluid discharged to the duct. And disclosed is a reactor or heat exchanger has the annular distributor, and a method of producing unsaturated aldehyde or unsaturated acid from olefin by catalytic gas phase oxidation in the reactor.

Description

technical field [0001] The invention relates to an annular distributor with guide vanes improving its internal flow distribution, and to a reactor or heat exchanger with said annular distributor. Background technique [0002] Typically, multi-tubular catalytic reactors in the form of heat exchangers are used to efficiently remove the heat generated in the reaction. Such a reactor fills a plurality of reaction tubes with a solid catalyst in order to obtain a desired composition, and supplies a reaction gas into the reaction tubes to generate a chemical reaction. In addition, heat medium circulates through the reactor shell so that the chemical reaction can take place under optimal conditions. [0003] The multi-tube catalytic reactor tends to have hot spots in certain regions of the reaction tubes. The hot spots cause problems such as shortened service life and decreased selectivity of target products due to catalyst deterioration. Therefore, in order to reduce hot spots, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J8/06B01J8/02F28D7/00
CPCA63G13/08
Inventor 申相柏韩相弼林艺勋金荣培张祯训
Owner LG CHEM LTD
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