Methanol recovery tower The main materials of this machine and the material contact parts are SUS304, SUS316L, titanium, etc. according to the user's needs, and other parts are carbon steel, iron castings, steel castings, etc. It is widely used in the recovery of organic solvents such as ethanol, methanol, acetone, ethyl acetate, acetonitrile, tetrahydrofuran, dichloromethane, DMF, DMSO, toluene, isopropanol, tert butyl alcohol, and the separation and purification of products. More than 600 sets of them have been industrialized in industries such as API, pharmaceutical intermediates, fine chemicals, biodiesel, environmental protection, and wine making.
The purpose of this recovery tower is to recover methanol. It requires that the methanol water content at the tower top shall not exceed 1%, and the methanol content in the tower bottom water shall not exceed 0.1%.
Methanol is a simple saturated monohydric alcohol with molecular weight of 32.04 and boiling point of 64.7 ℃. Also known as "xylitol" or "lignin". It is colorless and volatile liquid with methanol smell. The low dose of population poisoning z is about 100mg/kg body weight, and 0.3~1g/kg oral intake can cause death. It is used in the manufacture of formaldehyde, pesticides, etc., and as an extractant for organic substances and a denaturant for methanol. It is usually made by reacting carbon monoxide with hydrogen, which is flammable. Its vapor and air can form an explosive mixture, which can cause combustion and explosion in case of open fire and high heat. Chemical reaction or combustion occurs when contacting with oxidant. In a fire, heated containers may explode. It can spread to a relatively far place at a lower place. In case of open fire, it will lead to backburning, burning and decomposing carbon monoxide and carbon dioxide. It is highly toxic, and methanol is widely used. It is a basic organic chemical raw material and fuel. It is mainly used in fine chemicals, plastics and other fields to produce formaldehyde, acetic acid, methyl chloride, methylamine, dimethyl sulfide and other organic products, and is also one of the important raw materials for pesticides and medicines. Methanol can be used as a new clean fuel after deep processing, and it can also be blended with gasoline. Methanol can react with ammonia to produce monomethylamine.
The existing methanol recovery equipment has the problem that the distillation and separation of methanol are not effective when recovering methanol, which requires multiple separations, and the separation effect is poor. The methanol separated from methanol is slow when collecting, which can not effectively achieve the effect of condensation, making the working efficiency of methanol recovery equipment slow. Therefore, we propose a methanol recovery equipment.
According to the different volatilities of methanol and water, under the same conditions, after multiple condensation and gasification, the component with higher volatility (methanol) will form a higher concentration on the tower top, while the water will be left at the tower bottom. As long as there is enough theoretical board height, we can get satisfactory target products.
The equipment uses centrifugal force field generated by rotation instead of conventional gravity field to greatly enhance gas-liquid mass transfer process. This new type of distillation equipment developed by using the high gravity technology can greatly increase the relative speed of air and alcohol, methanol and other solutions in practical application, accelerate the renewal of the phase interface, and multiply the production intensity, so as to increase the recovery efficiency, reduce the size of the equipment, and reduce energy consumption. It has the reputation of "transistor in the chemical industry".
The specific realization process is as follows: the gas as a continuous phase enters the shell from the air inlet 2, flows meandering from the outside of the rotor to the center along the gap between the static baffle ring and the dynamic baffle ring under the effect of the pressure difference, and leaves the bed through the air outlet 5 after zui; As the dispersed phase, the solution enters the center of the moving disk from the liquid inlet 6, and then is repeatedly thrown to the static baffle by a series of high-speed rotating dynamic baffles. After the zui is collected in the shell, it is led out from the liquid outlet 9 for recovery. During the process, the liquid phase experienced multiple acceleration, ejection and impact processes. During this process, the liquid and gas were in contact with each other at a great relative speed, and the liquid was thrown away from the screen hole of the moving ring with extremely small droplets. The high-speed moving droplets were collided, sheared and splashed on the moving and stationary rings, forming small droplets, liquid filaments and liquid films, As a result, the gas-liquid interface with large specific surface area and continuous renewal is obtained, so that the gas-liquid contact is quite sufficient, so the mass transfer rate is *.
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