The Process Characteristics of Methanol Synthesis from Coke Oven Gas

          Select the dry fine desulfurization process to remove the various forms of sulfur in the gas. There is thioether, thiophene, mercaptan and etc sulfur form in coke oven gas. Generally   adopt   hydrogenation process, which will transform the organic sulfur into inorganic sulfur, and then remove the inorganic sulfur. During the hydrogenation process, the gas will be heated to 300℃ and the inorganic sulfur will be removed using a medium temperature desulfurizer. This method avoids the process of "alternating hot and cold", and you could recovery of the converter heat as a heat source.

          Use pure oxygen catalytic conversion technology. This technology could convert methane to carbon monoxide and hydrogen, which are useful for synthesis methanol. In order to ensure the safe operation of the converter, it requires that the coke oven gas inlet temperature should be about 600 ℃, the normal opeating should reach 650℃. In order to reduce the consumption of the preheating furnace fuel gas and flue gas emissions, by setting the coke oven gas preheater, heat the coke oven gas and steam mixed gas to 500℃.  Meanwhile, set the coke oven preheating Boiler, water heater, and other preheater to fully recover the waste heat of the converted gas.

          Select the low-pressure synthesis technology and three tower distillation process to reduce energy consumption. Using a new type of energy-saving heat transfer equipment——frequency conversion evaporative air cooler at the conversion, synthesis, distillation device, instead of the traditional shell and tube heat exchanger, there is a significant energy saving effect. Frequency conversion evaporative air cooler uses non-evaporative and air-cooled combination. In the relatively high temperature uses air-cooled and relatively low temperature uses evaporation cold. Not only achieve the energy-saving goal, but also fully meet the needs of the process.