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Method for removing solid impurities of catalytic slurry oil through low-temperature coalescence

A technology for catalyzing oil slurry and solid impurities, applied in the field of petroleum refining and production, can solve the problems of concentrated liquid hazardous waste, poor separation effect, short operation cycle, etc., and achieve the effect of easy removal, fast speed and moderate process conditions

Active Publication Date: 2021-03-12
MAOMING YINGPENG ELECTROMECHANICAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the primary purpose of the present invention is to provide a method for low-temperature coalescence to remove solid impurities in catalytic oil slurry, so as to solve the problem of poor separation effect, short operation period, low yield of finished products, and hazardous waste of concentrated liquid produced by existing separation methods. problems, enabling wider use of catalytic slurry and avoiding secondary pollution

Method used

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  • Method for removing solid impurities of catalytic slurry oil through low-temperature coalescence

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Experimental program
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Effect test

Embodiment 1

[0038] A method for removing solid impurities from catalytic oil slurry by low-temperature coalescence, comprising the following steps:

[0039] (1) Heat treatment: use a heat exchanger to heat the catalytic oil slurry to 170°C;

[0040] (2) Dehydration treatment: Use a flash tank under the pressure of -0.03MPa to remove trace water in the catalytic oil slurry;

[0041] (3) Mixing by adding liquid additives: transfer the catalytic oil slurry to the mixer, and add 0.1% liquid additives into the pipeline, mix through the mixer, so that the liquid additives can be evenly dispersed in the catalytic oil slurry, and wrapped in tiny The colloid and asphaltene around the catalyst solid particles dissolve and diffuse, making the catalyst solid particles reveal polarity;

[0042] (4) Adding solid additives for mixing: Add 0.8% solid additives into the mixing tank, and carry out moderate stirring, and mix for 15 minutes, so that the polar catalyst solid particles and the solid additives...

Embodiment 2

[0052] A method for removing solid impurities from catalytic oil slurry by low-temperature coalescence, comprising the following steps:

[0053] (1) Heat treatment: use a heat exchanger to heat the catalytic oil slurry to 180°C;

[0054] (2) Dehydration treatment: use a flash tank to remove trace water in the catalytic oil slurry under slight negative pressure;

[0055] (3) Mixing by adding liquid additives: transfer the catalytic oil slurry to the mixer, and add 0.3% liquid additives into the pipeline, mix through the mixer, so that the liquid additives can be evenly dispersed in the catalytic oil slurry, and wrapped in tiny The colloid and asphaltene around the catalyst solid particles dissolve and diffuse, making the catalyst solid particles reveal polarity;

[0056] (4) Mixing with solid additives: add 3% solid additives into the mixing tank, and stir moderately, mix for 30 minutes, so that the polar catalyst solid particles and solid additives collide and coalesce into l...

Embodiment 3

[0065] The difference between this embodiment 3 and embodiment 2 is only:

[0066] In step (1), the heating temperature is 170°C;

[0067] In step (3), the addition amount of the liquid auxiliary agent is 0.2%, and the weight proportions of the dispersant, oil repellant, and diluent in the liquid auxiliary agent are respectively 20%, 20%, and 60%.

[0068] In step (4), the addition amount of the solid auxiliary agent is 1.5%, and the weight ratios of the nucleating agent, particle trapping agent and filter aid in the solid auxiliary agent are respectively 23%, 37%, and 40%.

[0069] In step (4), the stirring and mixing time is 20 minutes, and the ejection velocity of the jetting fluid is 20 m / s.

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Abstract

The invention discloses a method for removing solid impurities of catalytic slurry oil by low-temperature coalescence, which comprises the steps of heating, dehydrating, adding a liquid assistant, mixing, heating a solid assistant, mixing, and carrying out solid-liquid separation, thereby obtaining the purified catalytic slurry oil with low ash content in which solid impurities are removed. According to the invention, through the combined action of the liquid auxiliary agent and the solid auxiliary agent, tiny catalyst solid particles are aggregated into large particles, so that impurities areeasy to remove; the solid impurities in the catalytic slurry oil are separated out in a solid form, the process technology is novel, the operation is easy, and continuous separation can be achieved;the separated solid slag is in a loose solid state in appearance, is convenient to mix and burn with fire coal, and is environment-friendly; no concentrated solution or other liquid hazardous waste isgenerated, and no environmental pollution risk is caused; and the method has the advantages of mild process conditions, simple equipment, easy operation, continuous production, thorough solid-liquidseparation and high finished product yield, and the yield of the purified catalytic slurry oil obtained after separation reaches 99% or above.

Description

technical field [0001] The invention relates to the technical field of petroleum refining and production, in particular to a method for removing solid impurities from catalytic oil slurry through low-temperature coalescence. Background technique [0002] In the oil refining industry, catalytic cracking is the main secondary processing technology. In the catalytic cracking unit, many Oil refineries have adopted the measure of externally dumping oil slurry. According to statistics, the amount of externally dumping oil slurry in China accounts for 5%-10% of the processing capacity of the device, and the annual amount of externally dumping oil slurry is as high as 13.5 million tons. Catalytic oil slurry contains a large amount of aromatic hydrocarbons with short side chain condensed rings (3-5 rings), which is used for the production of carbon black, needle coke, carbon fiber, rubber softener and filler oil, plastic plasticizer, heavy traffic road asphalt and heat conduction It...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G53/02
CPCC10G53/02
Inventor 何宏鹰卢振肖邹国娟
Owner MAOMING YINGPENG ELECTROMECHANICAL EQUIP
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