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近十几年，我国的联醇工艺生产得到快速发展，成为甲醇工业的重要组成部分。联醇生产是将甲醇生产串联在合成氨工业中的，大多是煤为原料生产所需的原料气。合成氨联产甲醇工艺是将脱碳后的合成气直接合成甲醇，剩余的含 0.7% CO 的气体再送至铜洗工段，进行脱碳，来满足合成氨的工艺要求。以充分利用合成气中的碳资源。联醇生产中的甲醇分为两部分：甲醇的合成，合成甲醇是以变换气为原料，其中含有约 28％左右的 CO2，变换气经压缩机加压到 2MPa 进水洗塔，用水吸收 CO2，然后回压缩机进一步加压到 13MPa 进水冷器和油分离器，经水冷器和油分离器，分离去油、水后，进合成塔合成甲醇。粗甲醇的精馏，分两个阶段，先在轻馏分塔中脱除轻馏分。由于粗甲醇杂质中主要轻馏分是二甲醚，所以也把轻馏分塔称作脱醚塔。经脱除轻馏分后的甲醇（即预后甲醇）再送入重馏分塔（即加压塔和常压精馏塔），进一步把高沸点的重馏分杂质分离，就可以得到纯度在 99.8% 以上的精甲醇。“,”In the past ten years, my country’s combined alcohol production has been rapidly developed and has become an important part of the methanol industry. Co-alcohol production is a series connection of methanol production in the synthetic ammonia industry, and most of the raw gas required for coal-based raw material production. The synthetic ammonia co-production methanol process is to directly synthesize methanol from the decarbonized synthesis gas, and the remaining gas containing 0.7% CO is sent to the copper washing section for decarbonization to meet the process requirements of synthetic ammonia. In order to make full use of the carbon resources in the synthesis gas. The methanol in the production of co-alcohol is divided into two parts: the synthesis of methanol. The synthesis of methanol uses shift gas as the raw material, which contains about 28% CO2. The shift gas is pressurized by a compressor to a 2MPa inlet washing tower, and the CO2 is absorbed by water. Then the compressor is further pressurized to the 13MPa inlet water cooler and oil separator. After the oil and water are separated by the water cooler and oil separator, it enters the synthesis tower to synthesize methanol. The rectification of crude methanol is divided into two stages. First, the light ends are removed in the light ends column. Since the main light end of the crude methanol impurities is dimethyl ether, the light end tower is also called the ether removal tower. After removing the light end methanol （prognostic methanol）, it is then sent to the heavy end tower （ie pressurized tower and atmospheric distillation tower） to further separate the high boiling point heavy end impurities, and the purity of 99.8% or more can be obtained. Refined methanol.