Fluidized bed reactor and application thereof

A fluidized bed reactor and reactor technology, applied in chemical instruments and methods, chemical/physical processes, petroleum industry, etc., can solve the problems of aggravating catalyst particle wear, increasing device operating costs, low catalyst mechanical strength, etc. And the effect of stable reaction effect, reduction of operating cost and good reaction effect

Active Publication Date: 2015-05-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the general cyclone separator requires that the gas velocity entering the cyclone separator is in the range of 15-25m/s. High inlet gas velocity is beneficial to improve the gas-solid efficiency, but it will increase the wear of particles.
However, the mechanical strength of the cata

Method used

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  • Fluidized bed reactor and application thereof
  • Fluidized bed reactor and application thereof
  • Fluidized bed reactor and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0104] In this example, the structure of the fluidized bed reactor is as follows.

[0105] (1) The upper part of the settling zone is provided with a nested first cyclone gas-solid separator and a second cyclone gas-solid separator, the top of the first cyclone gas-solid separator is connected with the second cyclone gas-solid separator. The tops of the solid separators are connected, wherein, the straight cylinder areas of the two cyclone gas-solid separators are respectively provided with 4 guide air inlet passages along the tangential direction, and the circumferential direction of the guide air inlets in the straight cylinder areas is set evenly;

[0106] (2) The cross-section of the air-guiding channel is square and the outline of the air-guiding channel is a logarithmic spiral curve. From a point on the inlet end of the air-guiding channel and between the air-guiding channel and the straight cylinder The angle θ between the straight line determined by the point correspo...

Embodiment 2

[0128] Adsorption desulfurization was carried out in the same manner as in Example 1, except that no internals were set between the reaction zone and the settling zone.

[0129] Continuously for 500 hours. During the reaction process, the following indicators are monitored: (1) The composition of the obtained oil and gas products; (2) The average particle size of the catalyst in the catalyst fine powder storage tank and the catalyst dense bed in the fluidized bed reactor; (3) Fluidization The dilute phase density in the settling zone of the bed reactor, the results are listed in Table 4.

[0130] After reacting for 500 hours, the content of the catalyst having a particle size of less than 30 μm in the catalyst in the dense-phase bed in the fluidized bed reactor was 5.9% by weight. After 500 hours, 2.5 kg of catalyst fine powder was collected in the catalyst fine powder storage tank.

[0131] Table 4

[0132]

[0133] *: Based on the antiknock index of sulfur-containing g...

Embodiment 3

[0148] Adopt the method identical with embodiment 1 to carry out adsorption desulfurization, difference is:

[0149] The included angle between the straight line determined by a point on the inlet end of the guide air inlet channel and the point corresponding to the point on the port where the guide air inlet channel meets the straight barrel area and the horizontal plane is 5°;

[0150] The area of ​​the inlet end leading to the air inlet channel is A 231 =200mm 2 , the area of ​​the port where the guide air inlet channel connects with the straight barrel area is A 232 , A 231 / A 232 =2;

[0151] Adsorption desulfurization conditions include: the contact temperature is 420°C, the pressure is 4MPa in absolute pressure, the sulfur-containing hydrocarbon feedstock enters the reactor at a speed of 0.3m / s, and the oil mixture in the settling zone flows at a speed of 3.5m / s Enter the guide air intake channel.

[0152] Continuously for 500 hours. During the reaction process, ...

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Abstract

The invention provides a fluidized bed reactor and application thereof. The fluidized bed reactor comprises a reactor main body with sealed top, at least one spiral-flow type gas-solid separator, and a gas guide pipe; the upper part at a straight tube zone of the spiral-flow type gas-solid separator is provided with at least two guiding air intake channels along the tangential direction, and the contour of each guiding air intake channel is a spiral curve. The fluidized bed reactor is capable of effectively reducing suspension concentration of a catalyst fine powder in a settlement space, timely transferring the catalyst fine powder generated in the reaction process out of the reaction system, avoiding accumulation of the catalyst fine powder in the fluidized bed reactor, and enabling the reaction apparatus to stably operate for a long time and obtain good and stable reaction effect. The spiral-flow type gas-solid separator in the fluidized bed reactor generates small wearing on a catalyst particle, and is capable of obviously reducing catalyst consumption and reducing operation cost of the apparatus especially when being used as a reactor for adsorption desulphurization.

Description

technical field [0001] The invention relates to a fluidized bed reactor and its application. Background technique [0002] With the continuous improvement of environmental protection requirements in countries all over the world, the indicators of sulfur content in gasoline are becoming increasingly stringent. This puts forward higher requirements for gasoline desulfurization technology. From the structure of the reactor, the current gasoline desulfurization technology mainly includes two methods: fixed bed desulfurization and fluidized bed desulfurization. [0003] There are two methods of fixed bed desulfurization: hydrofining and adsorption desulfurization. The former will cause the loss of gasoline octane number due to the saturation of gasoline olefins and aromatics in the hydrogenation process, especially the deep desulfurization of gasoline with high olefin content will reduce the gasoline octane number. The losses are greater; the latter suffers from catalyst deacti...

Claims

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Application Information

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IPC IPC(8): B01J8/24C10G25/09
CPCB01J8/24B01J2208/00991C10G25/11
Inventor 朱丙田侯栓弟张久顺武雪峰毛安国张哲民田志鸿张同旺宋宁宁刘凌涛赵俊杰
Owner CHINA PETROLEUM & CHEM CORP
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