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Start-up method of methanol-to-light olefins reaction unit

A reaction device and low-carbon olefin technology, which is applied in the field of starting a methanol-to-low-carbon olefin reaction device, can solve the problems of long start-up time, large catalyst damage, low safety factor, etc., and achieves fast drying effect and drying effect. Good, the effect of increasing the heating rate

Active Publication Date: 2011-12-14
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0007] The technical problems to be solved by the present invention are the problems in the prior art that the driving time is longer, the catalyst is damaged more, and the safety factor is lower

Method used

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  • Start-up method of methanol-to-light olefins reaction unit
  • Start-up method of methanol-to-light olefins reaction unit

Examples

Experimental program
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Effect test

Embodiment 1

[0018] like figure 1The methanol-to-light olefin reaction-regeneration system shown, the reactor is a fast bed, the regenerator is a turbulent bed, the catalyst is SAPO-34 molecular sieve, the feed rate of methanol is 4.2 tons / hour, and the two auxiliary combustion chambers are fed into The fuel gas is ignited to heat the air. After the air is heated, it enters the reactor and the regenerator. After drying the lining, the air in the reactor is cut out, and the auxiliary combustion chamber of the reactor is disabled. A blind plate is added to the outlet of the auxiliary combustion chamber. The reactor cuts into the steam heated by the auxiliary heating furnace. The temperature of the steam is about 380°C. The temperature of the reactor can be controlled between 250°C and 300°C. At the same time, the regenerator is heated to about 450°C, and the catalyst is passed through a large dosing line. Transfer from the catalyst storage tank to the regenerator, when the regenerator bed ma...

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Abstract

The invention provides a starting method of a reaction device for preparing low-carbon olefin by use of methanol, and the method is mainly for solving the problems of longer starting time, larger damage degree of the catalyst and lower safety factor in the prior art. The technical scheme provided by the invention is as follows: a reaction device comprising a reactor, a regenerator, two auxiliary combustion chambers, an auxiliary heating furnace and a catalyst storage tank is adopted, wherein the reactor and the regenerator are respectively provided with one auxiliary combustion chamber; the two auxiliary combustion chambers are respectively used for drying linings of the reactor and the regenerator and heating the regenerator and the reactor; and steam heated through the auxiliary heating furnace is introduced into the reactor, thus the problems in the prior art are better solved, thus the method provided by the invention can be used in industrial production of the low-carbon olefin.

Description

technical field [0001] The invention relates to a start-up method of a methanol-to-light olefin reaction device. technical background [0002] Low-carbon olefins, namely ethylene and propylene, are two important basic chemical raw materials, and their demand is increasing. Generally, ethylene and propylene are produced through petroleum routes, but due to the limited supply and high price of petroleum resources, the cost of producing ethylene and propylene from petroleum resources continues to increase. In recent years, people have begun to vigorously develop the technology of converting alternative raw materials into ethylene and propylene. Among them, an important class of alternative raw materials for the production of light olefins are oxygenates, such as alcohols (methanol, ethanol), ethers (dimethyl ether, methyl ethyl ether), esters (dimethyl carbonate, methyl formate Esters), etc., these oxygenated compounds can be converted from coal, natural gas, biomass and othe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C1/20C07C11/04C07C11/06
CPCY02P20/584Y02P30/20Y02P30/40
Inventor 齐国祯钟思青张惠明王洪涛
Owner CHINA PETROLEUM & CHEM CORP
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