Methanol rectifying tower

Abstract

The invention belongs to the technical field of chemical production equipment, and particularly relates to a methanol rectifying tower. The methanol rectifying tower comprises a tower body, wherein the upper part of the tower body is a packing tower section, a connecting tower section is arranged in the middle of the tower body, a plate type tower section is arranged at the lower part of the connecting tower section, a concrete base is fixedly connected to the lower portion of the tower body, and a plurality of reinforcing angle steel seats are welded on the side surface of the concrete base; a steam outlet is formed in the top of the tower body, and a reflux liquid inlet, a methanol solution inlet and a mixture inlet are formed in the side face of the tower body from top to bottom in sequence; two groups of liquid distributors and a packing layer are arranged on the inner wall of the packing tower section; a plurality of groups of liquid reducing pipes are arranged on the inner wall of the plate type tower section. The methanol rectifying tower is better than the prior art, an ingenious design is utilized, the contact between liquid rectified methanol and the inner wall of the plate type tower section can be effectively reduced during flowing in a hydromechanical mode, and recycling and reutilization are facilitated; the liquid rectified methanol can be subjected to condensation, so that the recycling efficiency of the liquid rectified methanol is improved.

Description

technical field [0001] The invention belongs to the technical field of chemical production equipment, and in particular relates to a methanol rectification tower. Background technique [0002] Methanol is an important chemical product. In the process of methanol production, the distillation raffinate discharged from the bottom of the rectification tower is about 20% (or even higher) of the methanol output, which is usually called methanol waste water. If the methanol wastewater is directly discharged into the water body, it will cause serious pollution and damage to the environment. [0003] The most mature method for industrially preparing dimethyl ether is methanol vapor phase dehydration, and its reaction equation is as follows: [0004] 2CH 3 OH→CH 3 OCH 3 +H 2 o [0005] The main feature of this reaction is that there is a methanol rectification tower, and the water-containing methanol in the dimethyl ether rectification tower tank is purified by rectification to...

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Problems solved by technology

[0005] The main feature of this reaction is that there is a methanol rectification tower, and the water-containing methanol in the dimethyl ether rectification tower tank is purified by rectification to obtain refined methanol and return it as raw material. Although the recycling of raw materials has been realized, However, the rectification process also consumes a lot of heat energy, and the recovered refined methanol is in a liquid state, and it needs to be heated and vaporized when it is returned as a raw material, which also consumes a lot of heat energy

[0006] However, due to the reflux of liquid refined methanol, the flow mode of refined methanol is generally up and down, especially the residual part on the inner wall of the tower is not easy to recycle, it is also easy to pollute, and its condensation effect is also poor , will reduce the efficiency of its recycling

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