Washing device for prolonging service life of MTBE catalyst

Abstract

The invention relates to the field of petrochemical engineering, in particular to a water washing device for prolonging the service life of an MTBE (methyl tert-butyl ether) catalyst, which comprises an alkali washing box and an etherification reactor, and further comprises a filtering tank, a horizontal displacement mechanism, a primary mixer, a water washing tank and a secondary mixer, the filtering tank is internally provided with a spherical cavity, and the upper end and the lower end of the filtering tank are respectively provided with a gas inlet and a gas outlet; a circular filter screen is arranged in the spherical cavity, the primary mixer is connected with a water inlet pipeline, the washing tank is provided with a feed port and a discharge port, the feed port is connected with the primary mixer through a feed pipe, the secondary mixer is connected with the discharge port through a discharge pipe, and the secondary mixer is connected with a material injection pipeline. According to the device, the filtering tank can pull the zeolite molecular sieve through the traction mechanism, so that the zeolite molecular sieve can rotate and turn over in the spherical cavity in the filtering tank, and the two surfaces of the zeolite molecular sieve can face the gas inlet of the filtering tank to adsorb gas impurities; the utilization rate of the usable area of the zeolite molecular sieve is improved.

Description

technical field [0001] The invention relates to the petrochemical field, in particular to a water washing device for prolonging the life of an MTBE catalyst. Background technique [0002] MTBE, also known as methyl tert-butyl ether, is an organic compound with the chemical formula C 5 H 12 O, is a colorless and transparent liquid, insoluble in water, easily soluble in ethanol and ether, mainly used as a gasoline additive, with excellent antiknock property, increasing octane number, and can also be cracked to obtain isobutene. [0003] At present, the way of producing MTBE is mostly by mixing C4 with methanol and then adding a strong acid catalyst to produce etherification reaction. Among them, C4 as the raw material of MTBE is a colorless and flammable gas. Steam cracking and other methods are produced, but the C4 raw material produced by the above method will contain more basic impurities. If the etherification reaction is carried out directly without treatment, it will af...

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Problems solved by technology

[0003] At present, the way to produce MTBE is to mix C4 with methanol and then add a strong acid catalyst to produce etherification reaction. Among them, C4 as the raw material of MTBE is a colorless flammable gas, which is usually used in chemical companies through catalytic cracking, It is produced by steam cracking and other methods, but the C4 raw material produced by the above method will contain more basic impurities. If the etherification reaction is carried out directly without treatment, it will affect the strong acid catalyst added in the etherification reaction The activity of MTBE, thereby can affect the production of MTBE, and then cause the output of MTBE to decline, existing my country's announcement number is that the Chinese patent of CN209612984U discloses the washing device that is used to prolong the life of MTBE catalyst, and its purpose of the invention solves the problem that contains in the carbon four gas The problem of basic impurities, but also contains the following defects:

[0004] First, the quartz sand filter used to remove carbon four gas impurities is a conventional filter. Generally, the filter elements in this filter are mostly fixed structures, so that a large amount of impurities will adhere to the side of the filter element facing the air inlet. The gas passing through the back side is the filtered pure gas, and the side on the back side of the filter element has an adsorption effect but cannot be used, which eventually leads to a low utilization rate of the filter element area;

[0005] Second, the water washing tank in the device needs to be replaced regularly after the PH test, which is very troublesome, and when the PH test fails, the gas in the unwashed tank will go to the next step, whether it is directly discharged or rewashed. and;

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