A fixed bed-fluidized bed reactor and its application

A fluidized bed reactor and fixed bed technology, applied in chemical instruments and methods, chemical/physical processes, hydrocarbon oil processing, etc., can solve problems such as energy waste, achieve high production efficiency, simplify construction and operation process, structure simple effect

Active Publication Date: 2018-09-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Once these reaction processes are coupled together, the traditional reactor cannot satisfy this reaction process, which will inevitably cause all catalysts to be regenerated, resulting in a waste of energy

Method used

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  • A fixed bed-fluidized bed reactor and its application
  • A fixed bed-fluidized bed reactor and its application
  • A fixed bed-fluidized bed reactor and its application

Examples

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preparation example Construction

[0027] The preparation method of the desulfurization adsorbent is a conventional method in the art, and there is no special requirement. For example, kaolin is used as the matrix, aluminum sol and or silica sol are used as the binder, and a certain proportion of H 2 S adsorption active components, made by beating, spray granulation and roasting.

[0028] The particle size of the desulfurization adsorbent is conventionally selected, subject to the ability to achieve flow. Generally, the particle size of the desulfurization adsorbent is 50-400 microns, preferably 50-200 microns. In the petroleum hydrocarbon adsorption desulfurization method provided by the present invention, the particle size of the desulfurization adsorbent is the volume average particle size, which can be measured by a laser particle size analyzer.

[0029] The operating conditions of the fixed bed-fluidized bed reactor are: the reaction temperature is 200-600° C., preferably 250-500° C.; the reaction pressu...

Embodiment 1

[0061] use as image 3 The reaction device shown, wherein the structure of the fixed bed-fluidized bed reactor is as attached figure 1 shown. In the fixed bed-fluidized bed reactor, the fixed bed layer is filled with hydrodesulfurization catalyst RSDS-21, and the fluidized bed layer uses desulfurization adsorbent Cat-1. The catalytic cracking gasoline raw material is added to the fixed bed layer through the fluid feed port for reaction, and the operating conditions of the fixed-fluidized bed reactor: the pressure is 5.0MPa, and the hydrogen-to-oil ratio is 0.4Nm 3 / m 3 , the reaction temperature is 420°C, and the reaction weight hourly space velocity is 4h -1 . The superficial gas velocity of the fluidized bed is 0.3m / s, the residence time of the desulfurization adsorbent in the fluidized bed is 30 minutes, and the temperature of the adsorbent regenerator is 550°C. Product properties and hydrogen consumption are shown in Table 4.

Embodiment 2

[0063] use as image 3 The reaction device shown, wherein the structure of the fixed bed-fluidized bed reactor is as attached figure 2 shown. In the fixed bed-fluidized bed reactor, the fixed bed layer is filled with hydrodesulfurization catalyst RSDS-21, and the fluidized bed layer uses desulfurization adsorbent Cat-2. The catalytic cracking gasoline raw material is added to the fixed bed layer through the fluid feed port for reaction. The operating conditions of the fixed-fluidized bed reactor: the pressure is 3MPa, and the hydrogen-to-oil ratio is 0.5Nm 3 / m 3 , the reaction temperature is 440°C, and the reaction weight hourly space velocity is 5h -1 , the superficial gas velocity of the fluidized bed is 0.1m / s, the residence time of the desulfurization adsorbent in the fluidized bed is 10 minutes, and the regeneration temperature of the adsorbent is 550°C. Product properties and hydrogen consumption are shown in Table 4.

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Abstract

A fixed bed-fluidized bed reactor is divided into a particle settling zone, a reaction zone and a gas buffer zone from top to bottom; the reaction zone is divided into a fixed bed layer and a fluidized bed layer in the radial direction from outside to inside or from inside to outside; a separation plate which enables gas to pass through and enables catalyst particles not to pass through is arranged between the lower part of the fixed bed layer as well as the fluidized bed layer and the gas buffer zone; a space between the upper part of the fixed bed layer and the particle settling zone is closed; the upper part of the fluidized bed layer communicates with the particle settling zone; the upper part of the fixed bed layer is provided with a fluid feed port; the particle settling zone is internally provided with a gas-solid separator; a gas phase outlet of the gas-solid separator is a fluid discharge port of the reactor; the fluidized bed layer is also provided with a fluidized catalyst inlet and outlet. A petroleum hydrocarbon adsorption desulfurization method provided by the invention simplifies device construction and operation process, saves the energy consumption, and is beneficial for realizing continuous reaction and regeneration of production.

Description

technical field [0001] The invention relates to a reactor in the field of chemical industry and its application, more specifically, to a fixed-fluidized bed reactor for chemical process and its application. technical background [0002] Process intensification refers to the use of new technologies and new equipment in the production and processing process to achieve the optimal match between the reaction process and process factors such as heat transfer, mass transfer and concentration, thereby improving energy efficiency, increasing equipment production capacity, reducing waste discharge. Chemical process intensification is a long-term goal in the chemical industry at home and abroad, and it has attracted more attention in recent years. In many developed countries such as the United States, chemical process intensification is listed as one of the three major areas of priority development in chemical engineering. [0003] A variety of complex reactions are involved in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J8/02B01J8/24C10G67/00
Inventor 朱丙田侯栓弟张久顺李锐张哲民武雪峰张同旺毛安国刘凌涛赵俊杰宋宁宁
Owner CHINA PETROLEUM & CHEM CORP
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