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Ceramic membrane, modifying method thereof, filter and filter system

A filtration system and ceramic membrane technology, used in hydrocarbon oil cracking, petroleum industry, etc., can solve the problems of filter blockage, poor catalyst and moisture effect, and reduced gas flux, etc., to improve service life, large flux, and low The effect of impurity content

Pending Publication Date: 2019-06-11
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved in the present invention is to overcome the poor effect of removing catalyst and moisture in the hydrogen circulation flow process of the suspended bed hydrogenation reaction in the prior art, easily making the filter core clogged, reducing the gas flux and the use of the filter core Life and other defects, thereby providing a ceramic membrane and its modification method, filter and filtration system

Method used

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  • Ceramic membrane, modifying method thereof, filter and filter system
  • Ceramic membrane, modifying method thereof, filter and filter system
  • Ceramic membrane, modifying method thereof, filter and filter system

Examples

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Embodiment 1

[0047] This embodiment provides a filter, see figure 2 , including ceramic membrane cylinder 1-7, upper membrane cover 1-2, lower membrane cover 1-9 and membrane shell 1-8, the upper membrane cover and the lower membrane cover are arranged at opposite ends of the membrane shell, and also include,

[0048] The gasket 1-3 is arranged between the upper membrane cover 1-2 and one end of the membrane shell 1-8, and between the lower membrane cover 1-9 and the opposite end of the membrane shell 1-8;

[0049] The snap rings 1-4 are respectively clipped on the inner walls of the opposite ends of the membrane shell 1-8, and the two ends of the ceramic membrane tube 1-7 are suitable to be sleeved on the snap ring 1-4 and are its fixed;

[0050] The O-shaped sealing ring 1-5 is arranged between the snap ring 1-4 and the ceramic membrane tube 1-7, so that the snap ring 1-4, the inner wall of the membrane shell 1-8, the ceramic membrane tube 1- A sealed space for containing hydrogen is ...

Embodiment 2

[0062] This embodiment provides a method for modifying a ceramic membrane, including:

[0063] The alumina ceramic membrane was soaked in 5wt% polytetrafluoroethylene aqueous solution, heated to 350°C at 1.2°C / min, and kept at this temperature for 3 hours to obtain a modified ceramic membrane;

[0064] This embodiment also provides a hydrogen recovery method comprising the above-mentioned modified ceramic membrane and adopting the suspension bed hydrogenation reaction of the filtration system described in Embodiment 1, comprising:

[0065] The suspended bed reactor discharges the reaction product containing hydrogen, oil and other mixtures. After passing through the hot high-pressure separator, the hydrogen-containing gas mixture enters the heat exchanger, and the oil enters the stripping tower. The hydrogen-containing gas mixture undergoes heat exchange. The modified ceramic membrane separates hydrogen and other gas impurities, and the separated hydrogen enters the suspended ...

Embodiment 3

[0069] This embodiment provides a method for modifying a ceramic membrane, including:

[0070] The alumina ceramic membrane was soaked in 15wt% polytetrafluoroethylene aqueous solution, heated at 0.8°C / min to 370°C, and kept at this temperature for 0.5h to obtain a modified ceramic membrane;

[0071] This embodiment also provides a hydrogen recovery method comprising the above-mentioned modified ceramic membrane and adopting the suspension bed hydrogenation reaction of the filtration system described in Embodiment 1, comprising:

[0072] The suspended bed reactor discharges the reaction product containing hydrogen, oil and other mixtures. After passing through the hot high-pressure separator, the hydrogen-containing gas mixture enters the heat exchanger, and the oil enters the stripping tower. The hydrogen-containing gas mixture undergoes heat exchange. The modified ceramic membrane separates hydrogen and other gas impurities, and the separated hydrogen enters the suspended be...

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Abstract

The invention belongs to the technical field of ceramic membrane filter preparation, and particularly relates to a modifying method of a ceramic membrane, a modified ceramic membrane and applicationsof the modified ceramic membrane in a filter and a filter system of hydrogen recovery of a suspension bed hydrogenation reaction. The method comprises the steps of immersing the ceramic membrane into5-15 wt% of a polytetrafluoroethylene solution, performing heating to 350-370 DEG C, and performing heat preservation for 0.5-3 h at 350-370 DEG C to obtain the modified ceramic membrane. The method provided by the invention modifies pores of the ceramic membrane by using polytetrafluoroethylene, so that the pores of the ceramic membrane have higher hydrophobicity and oleophobic chamfers, water and oil do not easily adhere to the pores of the ceramic membrane, and particle impurities such as catalysts are difficult to accumulate on the pores of the membrane and do not easily pass through the pores of the ceramic membrane, so that the phenomenon of clogging of the pores of the membrane is avoided, the gas flux attenuation is slowed down, and the service life of the membrane is prolonged; and in addition, the ceramic membrane has a large flux and excellent performance, can purify a hydrogen gas containing impurities, and can reduce production costs when applied to production devices suchas a filter.

Description

technical field [0001] The invention belongs to the technical field of ceramic membrane filter preparation, and in particular relates to a ceramic membrane, a modification method thereof, a filter and a filter system. Background technique [0002] Suspension bed hydrogenation process is one of the ideal methods for lightening heavy oil. The process is generally that the dispersed catalyst is uniformly mixed with the feedstock oil to obtain a mixed feedstock, and then the mixed feedstock and a large amount of hydrogen enter one or more same air In the barrel reactor, catalytic hydrogenation and cracking reactions are carried out under the condition of hydrogen. [0003] The hydrogenation reaction in the suspension bed hydrogenation process mostly adopts the hydrogen circulation process. After cooling, the reaction product from the reactor is separated from the gas-liquid phase in the high-pressure separator at a specific temperature and pressure. After compression, it is mixe...

Claims

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Application Information

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IPC IPC(8): C10G47/00
Inventor 李胜峰郭立新赵文涛王永斌王迎祥
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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