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A catalytic cracking oil slurry purification system and its purification method

A catalytic cracking oil slurry and purification system technology, which is applied in the field of catalytic cracking oil slurry purification, can solve the problems of unsatisfactory purification effect, high frequency of backwashing, and low purification efficiency, and achieve complete separation, low frequency of backwashing, and purification high efficiency effect

Active Publication Date: 2021-03-26
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a catalytic cracking oil slurry purification system and its purification method, aiming to solve the problems of unsatisfactory purification effect, low purification efficiency, poor stability and high backwash frequency in the prior art oil slurry electrostatic separation device

Method used

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  • A catalytic cracking oil slurry purification system and its purification method
  • A catalytic cracking oil slurry purification system and its purification method
  • A catalytic cracking oil slurry purification system and its purification method

Examples

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Embodiment 1

[0032] See attached figure 1 , attached figure 2 , attached image 3 , attached Figure 4 , a catalytic cracking oil slurry purification system of this embodiment, comprising an oil slurry storage tank A, a first cyclone separator B, a first-stage first filter D, a second-stage first filter E, two parallel-connected Electrostatic separator F and backwash mechanism; backwash mechanism includes backwash liquid storage tank H, second cyclone separator J and settling tank I, settling tank I, first-stage first filter D, second-stage first filter E and the second filter are also connected with a desorption mechanism G. Oil slurry storage tank A is used to store the oil slurry to be purified; oil slurry storage tank A is connected to the input end of the first cyclone separator B, and the large particle catalyst in the oil slurry is removed through the first cyclone separator B Powder; the catalyst content in the product after preliminary separation by the first cyclone separato...

Embodiment 2

[0038] A method for purifying catalytic cracking oil slurry of the present invention is carried out on the catalytic cracking oil slurry purification system described in Embodiment 1, comprising the following steps:

[0039] 1) Take the oil slurry to be purified in the oil slurry storage tank A, make it enter the first cyclone separator B, and carry out preliminary purification, the inlet velocity is 1-3m / s;

[0040] 2) The oil slurry separated by the first cyclone separator B is filtered and separated through the primary filter D and the secondary filter E in sequence, and the filtration accuracy of the primary filter D and the secondary filter E is 5-100 μm , the working pressure is 0.5-2.5MPa, the products produced by the primary filter D and the secondary filter E are used for fuel oil blending or needle coke production, and the remaining oil slurry enters the electrostatic separator F for electrostatic separation. During the filtration process The resulting filter cake ca...

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Abstract

The invention provides a system and a method for purifying catalytically cracked slurry oil. The system comprises a slurry oil storage tank, cyclone separators, electrostatic separators and a backwashing mechanism, a plurality of the electrostatic separators are used in parallel, every electrostatic separator comprises an outer shell and an inner shell rotatably arranged in the outer shell, multi-grade electrodes are arranged in the inner shell, every electrode includes a cathode plate, an anode plate and a glass ball filler, each of the cathode plate and the anode plate is provided with sieveholes, and the particle sizes of the glass ball fillers in the multi-grade electrodes decrease along the flow direction of the slurry oil. The invention also provides a method of purifying the slurryoil by using the purification system. The glass ball fillers with different particle sizes are used to form the electrodes with different grades, and the slurry oil to be purified is sequentially electrostatically separated to make the catalyst particles in the slurry oil gradually separated from large to small in order to achieve the stepped purification effect, so the system and the method havethe advantages of completeness in separation, high purifying efficiency and good stability; and the plurality of electrostatic separators are used alternately to complete backwashing in time in orderto achieve continuous operation.

Description

technical field [0001] The invention relates to the technical field of catalytic cracking oil slurry purification, in particular to a system and method for removing solids in catalytic cracking oil slurry, and in particular to a catalytic cracking oil slurry purification system and a purification method thereof. Background technique [0002] The main component of catalytic cracking oil slurry is condensed ring aromatics, which can be further processed to produce high-quality petroleum coke, carbon black, needle coke and carbon fiber, etc., and can also be used to blend heavy fuel oil. However, the oil slurry contains a relatively high concentration of catalyst particles (about 3000-6000mg / L), which makes comprehensive utilization of the oil slurry more difficult. When this oil slurry is directly used as industrial heavy fuel oil, it is easy to cause burner wear and furnace ash accumulation; when it is used to produce other products such as petroleum coke, the ash content is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G53/02
CPCC10G53/02C10G2300/208
Inventor 李强郭林飞武志俊李大树曹昊李安萌刘兆增王振波
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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