Chloromethane synthesis system

The utility model provides a chloromethane synthesis system which is characterized in that high-temperature chloromethane synthesis gas from a reaction kettle passes through a methanol vaporizer and an acid preheater and then is cooled to 25-35 DEG C through a cooling tower; after the synthesis gas passes through a first washing tower and a second washing tower, methanol, hydrogen chloride and water-soluble impurities in the synthesis gas are removed; then inputting the synthesis gas into a third washing tower, and further removing acidic substances in the synthesis gas; the water-containing methyl chloride synthesis gas output from the third washing tower enters a drying tower to be dried and dewatered, and finally dry and clean methyl chloride is obtained and collected and stored. In the application, the methanol is heated and vaporized by using the high-temperature chloromethane synthesis gas, and the heating and vaporizing of the methanol by using low-pressure steam in the original production can be repla