Ethyl alcohol industry distillation unit VOC waste gas recovery treatment method
A distillation unit and waste gas recovery technology, applied in gas treatment, separation methods, chemical instruments and methods, etc., can solve the problems of high operation and maintenance costs, low removal efficiency, high investment, etc., to reduce the impact of air, easy to operate, and energy efficient The effect of low consumption
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Embodiment 1
[0030] see Figure 1~2 , a method for recovering and treating VOC waste gas from a distillation unit in the alcohol industry, comprising the following steps:
[0031] S1. Liquefaction recovery of low-boiling aldehydes and a small amount of alcohol gas: the organic waste gas from the outlet of the rectifying tower tail cooler enters the low-temperature condenser 3 through the gas collecting hood 1 and the delivery pipeline 2, and in the low-temperature condenser 3, it is cooled by low-temperature water The condensation effect condenses the low-boiling aldehydes and a small amount of alcohol gas contained in the organic waste gas to form a condensate, which is discharged from the recovery pipe 4 at the bottom of the low-temperature condenser 3 and flows to the industrial alcohol recovery storage tank through the recovery pipeline;
[0032] S2. Transfer of remaining organic waste gas: under the action of induced draft fan 5, extract the remaining organic waste gas in the low-temp...
Embodiment 2
[0036] This embodiment is a further elaboration on the basis of Embodiment 1. The condensation method of the low-temperature condenser 3 is to open the cooling water valve of the 3 tubes of the tail gas low-temperature condenser of the rectifying tower, the cooling water system is running, and the temperature of the cooling water is controlled. Below 20°C, heat exchange occurs between the tube side of the low-temperature condenser 3 and the organic waste gas, thereby reducing the temperature of the organic waste gas and realizing the condensation and recovery of the organic waste gas.
[0037] The replenishment method of the medicinal solution is: firstly discharge the reactants through the bottom of the oxidation absorption tower 7, and inject clean water for circulating water; then configure alkali detergent and oxidant outside the machine, mix them and pass through the dosing pipe 8 Supplement the oxidation absorption tower 7 and mix with the circulating water in the oxidati...
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