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Quenching system and quenching method of reaction gas

A reactive gas and cold system technology, applied in separation methods, chemical instruments and methods, purification/separation of hydrocarbons, etc., can solve problems affecting dust removal effect, achieve high removal efficiency, stable operation, and simple operation

Active Publication Date: 2015-12-16
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the violent vaporization during the cooling process of saturated water, when the pressure fluctuates or the load is large, the quenching water curtain will be blown away, causing the reaction product to directly pass through the quenching tower, affecting the dust removal effect

Method used

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  • Quenching system and quenching method of reaction gas

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] This embodiment adopts figure 1 The quenching device shown quenches the reaction gas, wherein the reaction gas is the methanol-to-olefins reaction product, the methanol-to-olefins reaction product includes 50vol% propylene and 50%vol% water vapor, and the methanol-to-olefins reaction product is described in The content of the catalyst is 2mg / L, the temperature of the methanol-to-olefins reaction product is 300°C, and the pressure of the methanol-to-olefins reaction product is 0.05MPa. The quenching method includes:

[0049] Use the washing and cooling device 10 to cool and wash the reaction gas to obtain the washed gas, wherein the temperature of the washed gas is 100 ° C, and the volume flow ratio of the washed gas and the reaction gas is 1.15;

[0050] Utilize the spray device 20 to spray water mist to the gas after washing to obtain solid particle water and water mist gas, wherein the catalyst content in the solid particle water is 500mg / L;

[0051] A cyclone separa...

Embodiment 2

[0054] This embodiment adopts figure 1 The quenching device shown quenches the reaction gas, wherein the reaction gas is the methanol-to-olefins reaction product, the methanol-to-olefins reaction product includes 30vol% ethylene and 70%vol% water vapor, and the catalyst in the methanol-to-olefins reaction product The content is 20mg / L, the temperature of the methanol-to-olefins reaction product is 150°C, and the pressure of the methanol-to-olefins reaction product is 0.5MPa. The quenching method includes:

[0055] Use the washing and cooling device 10 to cool and wash the reaction gas to obtain the washed gas, wherein the temperature of the washed gas is 1150 ° C, and the volume flow ratio of the washed gas and the reaction gas is 1;

[0056] Utilize the spray device 20 to spray water mist to the gas after washing to obtain solid particle water and water mist gas, wherein the catalyst content in the solid particle water is 20000mg / L;

[0057] The cyclone separator 30 is used ...

Embodiment 3

[0060] This embodiment adopts figure 1 The quenching device shown quenches the reaction gas, wherein the reaction gas is the methanol-to-olefins reaction product, the methanol-to-olefins reaction product includes 10vol% ethylene, 30vol% propylene and 60%vol% water vapor, and the methanol The content of the catalyst in the olefins-to-olefins reaction product is 10 mg / L, the temperature of the methanol-to-olefins reaction product is 200° C., and the pressure of the methanol-to-olefins reaction product is 0.2 MPa. The quenching method includes:

[0061] Use the washing and cooling device 10 to cool and wash the reaction gas to obtain the washed gas, wherein the temperature of the washed gas is 120 ° C, and the volume flow ratio of the washed gas and the reaction gas is 1.1;

[0062] Utilize the spray device 20 to spray water mist to the gas after washing to obtain water containing solid particles and gas containing water mist, wherein the catalyst content in the water containing ...

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Abstract

The invention provides a quenching system and quenching method of a reaction gas. The quenching system comprises a washing cooling device, a spraying device, a cyclone separator and a condensing device, wherein the washing cooling device comprises heat exchange pipes and a quenched water distribution pipe arranged above the heat exchange pipes, and a washed gas is obtained after the reaction gas passes through the heat exchange pipes; a water mist-containing gas is obtained after the washed gas passes through the spraying device; the cyclone separator is used for separating and removing solid particles in the water mist-containing gas, so as to obtain solid particle-containing water and a separated gas; the condensing device is used for removing most water and oil in the separated gas, so as to obtain a condensed gas. According to the quenching system and the quenching method provided by the invention, the problem that the heat transfer coefficient of a quenched water system is low is avoided, the dedusting effect of the device is improved, and the problem that a tray and a pipeline are blocked due to the fact that wash water contains solid is further solved; besides, the quenching system and the quenching method have the following characteristics: investment is less, the removing efficiency of a catalyst is high, the cooling effect of a reaction product is good, operation is simple, running is stable, and the like.

Description

technical field [0001] The invention relates to the field of quenching technology, in particular to a quenching system for reaction gas and a quenching method for reaction gas. Background technique [0002] Ethylene and propylene are basic raw materials for the petrochemical industry. At present, olefins are mainly obtained by hydrocarbon cracking or catalytic cracking. In the case of increasingly tight global oil supply, people have developed a process for producing low-carbon olefins with oxides (especially methanol and ethanol as raw materials). Among them, raw materials such as alcohols can be produced with natural gas or coal synthesis gas, which solves the problem of the country's high dependence on foreign oil. [0003] At present, the quenching water washing technology in the methanol-to-olefins technology uses a quenching system to desuperheat, wash and remove dust from the reaction product, or use a water washing tower (or methanol washing tower) to condense the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D50/00C07C7/00C07C7/11C07C11/04C07C11/06C07C11/08
Inventor 王勇高文刚赵良郭伟苟荣恒何源刘义何海科吴国祥李国锋关丰中
Owner CHNA ENERGY INVESTMENT CORP LTD