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Device and method for reducing the temperature of catalytic cracking regenerated catalyst

A catalytic cracking unit, a technology for regenerating catalysts, applied in catalytic cracking, cracking, petroleum industry, etc., can solve the problems of poor cracking performance than regenerated catalysts, small application range, etc. sexual effect

Active Publication Date: 2009-11-11
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of device and method for reducing the temperature of catalytic cracking regenerated catalyst, to solve the problem of reducing the temperature of catalytic cracking regenerated catalyst in the prior art, which has a small application range and is used to reduce the temperature of catalytic cracking regenerated catalyst. The problem that the cracking performance of the hydrocarbon riser reactor spent catalyst on heavy oil riser reactor feed is inferior to that of the regenerated catalyst

Method used

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  • Device and method for reducing the temperature of catalytic cracking regenerated catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] in figure 1 The test was carried out on a catalytic cracking pilot plant with a single heavy oil riser reactor shown. The pilot plant is equipped with the device of the present invention for reducing the temperature of the catalytic cracking regenerated catalyst, but is not equipped with a regenerated catalyst circulation pipe, and the regenerated catalyst after cooling in the regenerated catalyst cooler is not circulated back into the regenerator through the regenerated catalyst circulation pipe.

[0044] The heavy oil riser reactor processes Daqing catalytic raw materials, with a processing capacity of 30kg / d, and performs a simulated full refining operation; a commercially available CC-20D catalytic cracking catalyst is used. The stripping medium in the stripping section of the settler is steam, and the stripping temperature is 500°C.

Embodiment 2

[0047] The operating conditions of the regenerator, the regenerated catalyst cooler and the heavy oil riser reactor, as well as the product distribution of the heavy oil riser reactor and some properties of the gasoline produced are shown in Table 4. The test equipment used in Example 2, the feed of the heavy oil riser reactor, the processing capacity, the simulated full-refining operation mode and the catalytic cracking catalyst used, as well as the stripping medium and stripping temperature in the stripping section of the settler, and implementation Example 1 is the same.

Embodiment 3

[0049] The operating conditions of the regenerator, the regenerated catalyst cooler and the heavy oil riser reactor, as well as the product distribution of the heavy oil riser reactor and some properties of the gasoline produced are shown in Table 5. The test equipment used in Example 3, heavy oil riser reactor feed, processing capacity, simulated full-refining operation mode and catalytic cracking catalyst used, as well as the stripping medium and stripping temperature in the stripping section of the settler, and implementation Example 1 is the same.

[0050] Table 1 Feeding properties of heavy oil riser reactor (comparative example, example 1 to example 3)

[0051] Feed to heavy oil riser reactor

Daqing Catalytic Feedstock

Density (20℃), kg / m3

906.2

Residual carbon, w%

4.0

Family composition, w%

Saturated hydrocarbon

62.5

Aromatics

25.4

Gum + Asphaltene

12.1

Sulfur content, μg / g

2...

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Abstract

The invention discloses a device and a method for reducing the temperature of catalytic cracking regenerated catalyst in the field of petrochemical industry catalytic cracking and aims to solve the problems that the method for reducing the temperature of catalytic cracking regenerated catalyst has a small application range in the prior art, and the like. The device comprises a regenerated catalyst cooler (4) arranged below a regenerator (1) and the bottom head of the cooler is internally provided with a cooling main air distributor (8). A sleeve (5) is arranged between the top of a taper section of the regenerated catalyst cooler and the bottom of the regenerator and provided with a regenerated catalyst conveying pipe (3) internally, and an annular space (6) is formed between the sleeve and the conveying pipe. A regenerated inclined pipe (11) is arranged between the regenerated catalyst cooler and a heavy oil riser reactor (12) of a catalytic cracking device. The invention also discloses a method for reducing the temperature of catalytic cracking regenerated catalyst by adopting the device. The device and the method can be used for setting a catalytic cracking device of a single heavy oil riser reactor and a plurality of riser reactors.

Description

Technical field [0001] The invention belongs to the field of petrochemical catalytic cracking, and relates to a device and method for reducing the temperature of a catalytic cracking regenerated catalyst. Background technique [0002] At present, a type of catalytic cracking unit used in the catalytic cracking process of the petrochemical industry is equipped with a single heavy oil riser reactor or multiple riser reactors (including a heavy oil riser reactor). The outlets at the top of each riser reactor are respectively communicated with the respective settlers, and the bottom is communicated with the regenerator through respective regeneration inclined pipes and regeneration risers. In the above-mentioned catalytic cracking unit, the regeneration temperature of the catalyst is generally 690 to 750°C. Due to the high temperature of the regenerated catalyst and limited by the thermal balance of the device, the catalyst-to-oil ratio of the heavy oil riser reactor is relatively sm...

Claims

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Application Information

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IPC IPC(8): C10G11/00
Inventor 王文柯王龙延刘昱闫鸿飞乔立功孟凡东汤海涛
Owner CHINA PETROCHEMICAL CORP
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