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Coaxial type compounding lifting pipe circular reaction-regenerating device

Inactive Publication Date: 2011-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the single reaction of light hydrocarbons and light oil, this kind of technology can increase the heat supplied to light hydrocarbons and light oil cracking to a certain extent, but the heat generated during the regeneration of the coked catalyst obtained from the heavy oil reaction is limited, and it is difficult to realize the cracking of light hydrocarbons. Cracking with light oil at a temperature higher than 650°C
In addition, the heat required for the reaction in circulating fluidized bed technology is directly related to the amount of regenerated catalyst entering the riser reactor. The suitable reaction temperature for heavy oil catalytic cracking is lower than that of light hydrocarbons and light oil catalytic cracking. The reaction between light oil and heavy oil has difficult to reconcile contradictions in the regulation of catalyst circulation and reaction temperature, which makes the range of adjustable reaction conditions for heavy oil, light hydrocarbons, and light oil reactions narrow, and it is even difficult to carry out the reaction within their respective suitable conditions , the economic benefit is reduced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] exist figure 1On the device shown, two sets of experiments were carried out to produce more ethylene. The reaction raw materials, catalysts, reaction conditions and results are shown in Table 1. The size of the built-in riser reactor is Φ40mm×4mm×4.5m, and there is no diameter change. The size of the external riser reactor is Φ25 mm x 2.5 mm x 6 m, without variable diameter. The size of the reaction settler is Φ80mm×6mm×1.5m, of which the cyclone separator is the first stage. The specification of the regenerator is Φ273mm×6mm×4m, and the cyclone separator is the first stage. The embedded riser reactor is nested inside the regenerator, and the lower part is located outside the regenerator. There is a feed nozzle installed on the plane 2 meters away from the bottom of the regenerator. There are three fuel oil and gas nozzles arranged in equal parts. Into the methane gas for combustion, the methane flow rate is 80 ml / min.

[0017] The mass percentage of butene in the m...

Embodiment 2

[0027] exist figure 1 On the device shown, two sets of experiments for producing more propylene were carried out, and the reaction raw materials, catalysts, reaction conditions and results are shown in Table 3. The composition of mixing C4 is the same as in Example 1; light naphtha is mainly C 5 ~C 8 Alkanes, the mass percentages are 12.62%, 25.54%, 25.25%, and 17.86% respectively; the density of Daqing blended oil is 0.89 g / cm 3 , the mass percentage of H is 12.2%, the mass percentage of saturated fraction is 57.54%, the mass percentage of aromatic fraction is 26.63%, the mass percentage of gum is 15.55%, the mass percentage of asphaltenes The content is 0.28%. In the fifth group of experiments, the mass ratio of mixed C4 and Daqing mixed oil was 3:7, and in the sixth group of experiments, the mass ratio of light naphtha and Daqing mixed oil was 5:5. The temperature inside the regenerator is 680-730°C.

[0028] table 3

[0029]

Embodiment 3

[0031] Adopt the riser device substantially identical with embodiment 1, wherein embedded type riser reactor adopts two feed nozzles, two nozzles are 0.2 meters apart, enter and mix C4 and FCC light gasoline respectively from bottom to top, reaction raw material, Catalysts, reaction conditions and results are shown in Table 4. The composition of used raw material sees embodiment 1,2. In the seventh group of experiments, the mass ratio of mixed C4 and FCC light gasoline was 5:5, and the mass ratio of mixed C4+FCC light gasoline and Daqing mixed oil was 2:8. The temperature inside the regenerator is 680-730°C.

[0032] Table 4

[0033]

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Abstract

The invention relates to a coaxial type compounding lifting pipe circular reaction-regenerating device which is mainly used for solving the problem that light hydrocarbon, light oil and heavy oil are difficult to react in a suitable condition respectively when a lifting pipe reactor is utilized to carry out circular reaction regeneration in the process of coupling catalytic cracking of the existing light hydrocarbon, light oil and heavy oil. The technical scheme adopted by the invention is as follows: the reaction-regenerating device mainly comprises an embedded lifting pipe reactor 1, an external lifting pipe reactor 19, a regenerator 2, a depressor 3 and a stripping section 4; the middle of the embedded lifting pipe reactor 1 is a primary reaction region and is arranged in the regenerator 2, and the lower part of the embedded lifting pipe reactor 1 is positioned at the external part of the regenerator 2; the external lifting pipe reactor 19 is positioned at the outer part of the regenerator 2; and the depressor 3, the stripping section 4 and the embedded lifting pipe reactor 1 are positioned at the same axis. By utilizing the technical scheme, the problem in the prior art is better solved; and the coaxial type compounding lifting pipe circular reaction-regenerating device can be used in heavy oil catalytic cracking industrial production productive in ethylene and propylene.

Description

technical field [0001] The invention relates to a coaxial composite riser circulation reaction-regeneration device. Background technique [0002] Ethylene and propylene are important basic organic synthesis raw materials. At present, the production of ethylene and propylene mainly relies on steam thermal cracking. About 90% of ethylene and 61% of propylene come from steam thermal cracking process. Although this process has been widely used in the world, there are still some unsatisfactory aspects, especially the reaction requires high temperature (800-1200 ° C), which can High consumption, high yield of dry gas with low added value. If a catalyst is introduced and the method of catalytic cracking is adopted, the reaction temperature can be reduced by 50-200°C, energy consumption and dry gas generation can be reduced, and the selectivity of propylene can be improved. Therefore, many researchers are currently working on catalytic cracking to produce ethylene, Propylene Rese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G11/18
Inventor 李晓红谢在库钟思青齐国祯
Owner CHINA PETROLEUM & CHEM CORP