Catalytic cracking method and device

A catalytic cracking device and catalytic cracking technology, applied in the direction of catalytic cracking, chemical instruments and methods, cracking, etc., can solve the problems of lowering the temperature of the regenerated catalyst, short oil agent contact time, difficult to achieve, etc., to achieve improved properties, short oil agent The effect of exposure time

CN104513670AActive Publication Date: 2015-04-15LUOYANG PETROCHEMICAL ENG CORP SINOPEC +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2015-04-15

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Abstract

The invention discloses a catalytic cracking method and device in petroleum chemical industry. The catalytic cracking method is as follows: performing heavy oil catalytic cracking reaction with the oil agent contact time of 0.2-1.5s by use of a lift pipe; performing gas-solid separation on a reaction material flow by use of a cyclone separator; entering reaction oil and gas into a fractionating tower for fractional distillation; after steam stripping of a spent catalyst, entering the spent catalyst into a baffle tubular regenerator, after mixing with a uncooled cycle regenerated catalyst, burning off more than 90% of generated coke by main air co-current contact with the baffle tubular regenerator, entering a semi regenerated catalyst into a turbulent bed regenerator, burning off the rest generated coke by main air countercurrent contact with the turbulent bed regenerator, and returning the regenerated catalyst into the lift pipe for recycling use. The invention discloses a catalytic cracking device for realizing the catalytic cracking method. The catalytic cracking method and device can be used for heavy oil catalytic cracking.
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Description

technical field

[0001] The invention relates to a catalytic cracking method and device in the petrochemical industry. Background technique

[0002] At present, the conventional catalytic cracking units used in the petrochemical industry generally have the following disadvantages: First, due to the limitation of regeneration kinetics, the regeneration temperature is relatively high, resulting in a relatively high temperature of the regenerated catalyst participating in the reaction (generally around 700°C) ;Limited by the heat balance of the device, the agent-oil ratio of the heavy oil riser is relatively small, generally the total agent-oil ratio is 5-8 (the total agent-oil ratio of the riser is the weight circulation of the catalyst in the riser and the feed of each strand of the riser The ratio of the sum of the weight flow rates), so that the number of active sites contacted by the unit weight of heavy oil feed is less, which inhibits the catalytic cracking reaction to a ...

Examples

Embodiment 1

[0068] The main operating conditions and product distribution of Examples 1-5 are shown in Table 4. The main properties of the liquid product of Example 1 are shown in Table 5, the main properties of the liquid product of Example 2 are shown in Table 6, the main properties of the liquid product of Example 3 are shown in Table 7, and the main properties of the liquid product of Example 4 are shown in Table 8. The main properties of liquid products of 5 are shown in Table 9.

[0069] Table 1 Heavy oil raw material properties (comparative example, embodiment 1~5)

[0070] Heavy Oil Raw Materials

Daqing Atmospheric Residue

Density (20℃), kg·m -3

900.2

Charcoal residue, %

4.2

Family composition, %

saturated hydrocarbon

62.3

Aromatics

22.6

Colloid + asphaltenes

15.1

Sulfur content, μg g -1

1450

Ni, μg g -1

4.3

V, μg·g -1

0.2

[0071] The main operating co...