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Coaxial biconic device in two stages for separating gas from solid rapidly

A gas-solid rapid separation, coaxial technology, applied in separation methods, dispersed particle separation, catalytic cracking, etc., can solve the problems of inflexible structure changes, low separation efficiency, long residence time, etc., and achieve simple structure and low pressure , The effect of wear and tear is small

Inactive Publication Date: 2008-01-16
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of inflexible structural changes, low separation efficiency, high pressure drop and long residence time in the prior art.

Method used

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  • Coaxial biconic device in two stages for separating gas from solid rapidly
  • Coaxial biconic device in two stages for separating gas from solid rapidly
  • Coaxial biconic device in two stages for separating gas from solid rapidly

Examples

Experimental program
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Effect test

Embodiment 1

[0058] The geometric structure dimensions of the separator of this embodiment are respectively: the diameter of the upper part 100 of the conical separation vessel is 5.4D, the height is 6.0D, and the diameter of the separator inlet is D; Both are 0.8D, the radius of the bottom of the expansion baffle 1 is 1.8D, the diameter of the upper part is 1.1D, and the height is 2.2D. The curvature radius of the first-level discrete cone 3 is 1.5D, and the arc surface angle is 65 degrees. The upper bottom is 2.0D, the lower bottom is 3.0D, the height is 0.6D, the vertical distance between the upper bottom surface and the bottom of the first-level discrete cone 3 is 0.1D, the height of the annular baffle 6 is 0.02D, the diameter is 3D, and the diameter of the gas conduit is 10 is 0.6D. The average gas velocity of the inlet shrink nozzle 2 is 4.4m / s, the average particle size is 60 microns, and the apparent density is 1500kg / m 3 FCC materials, particle circulation rate 20kg / (m 2 s). Th...

Embodiment 2

[0060] The diameter and height of the lower part of the inlet retracting nozzle 2 of the separator of this embodiment are changed to 0.6D, and the height of the outer expansion baffle is changed to 2.4D. The diameter of the upper bottom of cone 4 is 2.2D, the lower bottom is 3.3D, and the particle circulation rate is 30kg / (m 2 s) except that all the others are the same as in Example 1. At this time, the separation efficiency of the separator is 99.2%, the average residence time of the gas is about 1s, and the static pressure drop is about 100Pa.

Embodiment 3

[0062] In this embodiment, the radius of curvature of the primary discrete cone 3 of the separator is changed to 2.5D, the angle of the arc surface is changed to 45 degrees, the diameter and height of the lower part of the inlet shrinkage nozzle 2 are changed to 0.7D, and the height of the outer expansion baffle plate 1 is changed to 2.4D, the bottom radius is 2.0D, the operating gas velocity is 5m / s, and the particle circulation rate is 26kg / (m 2 s) except that all the other are the same as in Example 1, the efficiency of the separator is 98.6%, the average residence time of gas is 900ms, and the pressure drop of the separator is about 80Pa.

[0063] The down-bed reactor utilizes the characteristic that the gas-solid two-phase moves downward along the gravitational field, and is especially suitable for the rapid reaction process with the intermediate product as the target product. Under normal circumstances, the mixing of gas-solid two-phase, the reaction in the downcomer, an...

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Abstract

A two-stage fast gas-solid separator with two coaxial cones is composed of main body with top gas outlet and bottom particle outlet, reentrant nozzle, the externally extended barrier plate surrounding said nozzle, stage-one divergent conic body, stage-two conic body and supporter. Its advantages are convenient regulation to structure, and high separation speed and efficiency.

Description

technical field [0001] The invention belongs to gas-solid separation equipment in the field of chemical industry, in particular to a coaxial double-cone two-stage gas-solid rapid separation device. Background technique [0002] In recent years, due to the continuous emergence of high-activity, high-selectivity catalysts and high-temperature rapid reaction processes, the gas-solid co-current down-flow circulating fluidized bed (down-flow bed) is a new type of ultra-short contact reactor. Fluid catalytic cracking, fast pyrolysis of pulverized coal and fast pyrolysis of biomass have received more and more attention. For such ultrashort contact reactors, the rapid separation of reactor outlet gas and particles has become more and more important. For example, in the catalytic cracking reaction of hydrocarbons, the reaction temperature is getting higher and higher, so the reaction is generally completed within 3 to 5 seconds, or even shorter. The shortening of the reaction time ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J8/24C10G11/18B01D45/00
Inventor 林伟刚陈木年姚建中都林李松庚吕雪松
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI