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Method for reducing content of sulfur oxides in catalytic cracking smoke

A technology of sulfur oxides and catalytic cracking, which is applied in the refining and cracking process treatment of multi-stage series connection, petroleum industry, water treatment and refining, etc. Sulfur oxide content, low cost effect

Active Publication Date: 2014-03-05
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above patents all adopt the post-treatment method, and the adsorption method is used to remove sulfur oxides in the catalytic cracking flue gas. The process is complicated and the operation cost is high.

Method used

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  • Method for reducing content of sulfur oxides in catalytic cracking smoke
  • Method for reducing content of sulfur oxides in catalytic cracking smoke
  • Method for reducing content of sulfur oxides in catalytic cracking smoke

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Composition of the multifunctional composite emulsifier: Span 6060%, triethanolamine surfactant 32% and mixed aromatics 8%, wherein the mixed aromatics are mixed with C8 aromatics and C9 aromatics in a mass ratio of 1:1.

[0025] FCC raw emulsified oil was prepared under the conditions of 6% water addition, 0.05% emulsifier addition, 70°C emulsification temperature, and 22000r / min stirring speed, and its properties are listed in Table 2.

[0026] The catalytic cracking test was carried out on the riser unit with FCC feedstock and emulsified feedstock respectively. The process conditions are: reaction temperature 505°C, regeneration temperature 700°C, agent-oil ratio 5.0. The test is continuous oil feeding for 10 hours, and the oil feeding amount is 8kg; the feeding method of the emulsified raw material is continuous feeding, a homogeneous emulsifying equipment is installed in front of the riser nozzle, the stirring speed is adjustable, and the emulsified oil processing ...

Embodiment 2

[0030] Composition of multi-functional composite emulsifier: Span 6050%, triethanolamine surfactant 40% and mixed aromatics 10%, wherein mixed aromatics are mixed with C8 aromatics and C9 aromatics in a mass ratio of 1:1.

[0031] FCC raw emulsified oil was prepared under the conditions of 2% water addition, 0.01% emulsifier addition, emulsification temperature 50°C, and stirring speed 22000r / min, and its properties are listed in Table 2.

[0032] The catalytic cracking test was carried out on the riser unit with FCC feedstock and emulsified feedstock respectively. The process conditions are: reaction temperature 505°C, regeneration temperature 700°C, agent-oil ratio 5.0. The test is continuous oil feeding for 10 hours, and the oil feeding amount is 8kg; the feeding method of the emulsified raw material is continuous feeding, a homogeneous emulsifying equipment is installed in front of the riser nozzle, the stirring speed is adjustable, and the emulsified oil processing capaci...

Embodiment 3

[0036] Composition of the multifunctional composite emulsifier: Span 6052%, triethanolamine surfactant 42% and mixed aromatics 6%, wherein the mixed aromatics are mixed with C8 aromatics and C9 aromatics in a mass ratio of 1:1.

[0037] FCC raw emulsified oil was prepared under the conditions of 12% water addition, 2% emulsifier addition, 90°C emulsification temperature, and 23000r / min stirring speed, and its properties are listed in Table 2.

[0038] The catalytic cracking test was carried out on the riser unit with FCC feedstock and emulsified feedstock respectively. The process conditions are: reaction temperature 505°C, regeneration temperature 700°C, agent-oil ratio 5.0. The test is continuous oil feeding for 10 hours, and the oil feeding amount is 8kg; the feeding method of the emulsified raw material is continuous feeding, a homogeneous emulsifying equipment is installed in front of the riser nozzle, the stirring speed is adjustable, and the emulsified oil processing ca...

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Abstract

The invention which relates to a method for reducing the content of sulfur oxides in a catalytic cracking smoke belongs to the technical field of petroleum refining catalytic cracking. The method comprises the following steps: 1, homogeneously emulsifying a catalytic cracking raw material under conditions that the pressure is normal, the temperature is 50-90DEG C, the water addition amount is 1-13%, the multifunctional compound emulsifier addition amount is 0.01-2% and the stirring speed is 20000-30000r / min; and 2, directly catalyzing the obtained emulsified raw oil which is used as a catalytic raw material. By adopting above heavy oil catalytic cracking raw material emulsification technology disclosed in the invention, the catalytic feeding material atomization degree is improved, the dispersibility of the catalytic feeding material is improved, and the particle size of feeding oil drops is greatly reduced, thereby purposes that the light oil yield and the total liquid yield are improved and the content of the sulfur oxides in the smoke is reduced can be reached, and the method has the advantages of small investment, low cost and convenient operation.

Description

technical field [0001] The invention relates to a method for reducing the content of sulfur oxides in flue gas from catalytic cracking, belonging to the technical field of catalytic cracking in petroleum refining. Background technique [0002] Environmental pollution is one of the issues that people are generally concerned about today. With the increasingly stringent environmental protection laws, it is necessary to reduce the emission of sulfur oxides from various devices including catalytic cracking (FCC) devices. At the same time, the sulfur content of catalytic cracking raw materials is getting higher and higher. Therefore, how to reduce the emission of sulfur oxides in FCC units has become a hot issue in the research of major refineries in the world. [0003] In the catalytic cracking process, the raw oil contains a certain amount of sulfur, and in the reactor, about 50% of the sulfur is converted into H 2 S gas, about 30% to 45% of the sulfur remains in the liquid pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G55/06C10G29/20C10G31/08
Inventor 许金山许晓斌周忠国达建文徐兴忠王建华刘爱华韩新竹张艳
Owner CHINA PETROLEUM & CHEM CORP
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