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Top-mounted gas-liquid enhanced emulsification fixed bed reaction device and method

A fixed-bed reaction and fixed-bed reactor technology, applied in chemical instruments and methods, mixing methods, transportation and packaging, etc., can solve the problems of high safety risk, high investment, high material consumption, etc., and achieve low process severity and production. The effect of high safety and low cost per ton of product

Inactive Publication Date: 2020-08-04
NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can reduce the bubble size of the gas reactant in the fixed bed reactor from the traditional 3-10mm to 1μm-1mm, so that the gas-liquid mass transfer area can be doubled, and the mass transfer rate and hydrogenation reaction can be improved. Efficiency to solve the problems of high temperature, high pressure, high material consumption, high investment, and high safety risks in the traditional fixed-bed gas-liquid-solid three-phase reaction process

Method used

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  • Top-mounted gas-liquid enhanced emulsification fixed bed reaction device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as figure 1 The above-mounted gas-liquid enhanced emulsification fixed-bed reaction device includes:

[0035] The fixed-bed reactor 4 is provided with a catalyst bed 8 inside and a second outlet at the bottom; the catalyst bed 8 can be one or more layers, and when a multi-layer catalyst bed is used, heat exchange is provided between the beds. device.

[0036] The air intake device includes a gas raw material buffer tank 12, a compressor 13 and a gas raw material preheater 15 connected in sequence, for raw gas transportation;

[0037] The liquid inlet device includes a liquid raw material tank 9, a feed pump 10 and a liquid raw material preheater 11 connected in sequence, for raw material liquid delivery;

[0038]At least one bubble breaker is arranged on the top of the fixed bed reactor, and the bubble breaker is provided with a gas phase inlet, a liquid phase inlet and a first discharge port, and the first discharge port is connected to the fixed bed reactor; th...

Embodiment 2

[0042] This example specifically illustrates the method of using the device in Example 1 to carry out the gas-liquid intensified reaction.

[0043] The fresh hydrogen and kerosene enter through the gas phase inlet 2 of the gas-liquid linkage bubble breaker and the liquid phase inlet 1 of the gas-liquid linkage bubble breaker respectively at a standard volume ratio of 0.3:1 and are installed above the shell of the fixed bed reactor 4 In the gas-liquid linkage type bubble breaker 3, the other way enters the fixed bed reactor through the gas phase inlet 17 of the pneumatic bubble breaker and the liquid phase inlet 16 of the pneumatic bubble breaker respectively at a standard volume ratio of 900:1. 4 in the pneumatic bubble breaker 15 above the housing interior. Under the action of the gas-liquid linkage bubble breaker 3 and the pneumatic bubble breaker 15, the hydrogen is broken into microbubbles with an average diameter of 300-400 μm, and the gas-liquid is violently mixed to for...

Embodiment 3

[0046] Fresh hydrogen and aviation kerosene go through the gas phase inlet 2 of the gas-liquid linkage bubble breaker and the liquid phase inlet 1 of the gas-liquid linkage bubble breaker respectively at a standard volume ratio of 0.28:1 and enter the shell installed in the fixed bed reactor 4 In the gas-liquid linkage type bubble breaker 3 above, the other channel enters the fixed bed reaction through the gas phase inlet 17 of the pneumatic bubble breaker and the liquid phase inlet 16 of the pneumatic bubble breaker respectively at a standard volume ratio of 950:1. In the pneumatic bubble breaker 15 above the housing interior of the device 4. Under the action of the gas-liquid linkage bubble breaker 3 and the pneumatic bubble breaker 15, the hydrogen is broken into microbubbles with an average diameter of 300-600 μm, and the gas-liquid is violently mixed to form a gas-liquid emulsion, which enters the top of the fixed-bed reactor 4 , flows from top to bottom, passes through a...

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Abstract

The invention discloses a top-mounted gas-liquid enhanced emulsification fixed bed reaction device and method. The top-mounted gas-liquid enhanced emulsification fixed bed reaction device comprises afixed bed reactor, at least one bubble breaker, a gas-liquid separator, a feeding pump, a gas inlet device and a liquid inlet device. A gas raw material and a liquid raw material are preheated and then respectively enter the bubble breakers from a gas phase inlet and a liquid phase inlet, gas is broken into micron-sized bubbles, the micron-sized bubbles are mixed with liquid to form a gas-liquid emulsion, and the gas-liquid emulsion then enters the fixed bed reactor from top to bottom; the micron-sized bubbles have the characteristics of low speed and difficulty in coalescence and keep the original form when penetrating through a catalyst bed layer, so that a stable gas-liquid enhanced emulsification fixed bed reaction system is formed; and a product obtained after the reaction enters a gas-liquid separator from a second discharge port, gas-liquid two-phase separation is carried out, and gas and liquid are collected separately for subsequent treatment. The device and the method have the advantages of low operation pressure, large gas-liquid mass transfer phase interface area, high apparent reaction speed, high gas utilization rate, low investment, low energy consumption, flexible process and the like.

Description

technical field [0001] The invention relates to an upper-mounted gas-liquid enhanced emulsification fixed-bed reaction device and method. Background technique [0002] Fixed bed gas-liquid-solid three-phase reactor, often called trickle bed or trickle bed, has the characteristics of mature technology, simple process and equipment structure, etc., so it is the most widely used, and the industrial process is also the most, mainly used for hydrogenation , oxidation, chlorination, nitration and carbonylation reactions. [0003] With the continuous increase of environmental protection in the international community, the world's demand for high-efficiency and energy-saving reaction processes is increasing day by day, and people have paid more attention to the fixed-bed gas-liquid-solid three-phase reactor system. Although the traditional fixed-bed gas-liquid-solid three-phase reactor has strong adaptability to raw materials and simple operation, its reaction efficiency is low bec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/02B01J8/00B01F3/08B01D19/02C10G47/12
CPCB01J8/02B01J8/001B01J8/0278B01D19/02C10G47/12C10G2300/202C10G2300/70B01J2208/00823C10G2300/206C10G2300/4006C10G2300/4012B01F23/41
Inventor 张志炳李大鹏周政门存贵孟为民黄传峰罗华勋高亚男王宝荣高伟张锋李磊
Owner NANJING UNIV
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