求高手翻译个中文摘要。23号学校要交，谢谢各位啦
摘要
关键字：甲醇、天然气、合成、工艺流程
传统的石油、天然气资源日渐匮乏，特别是世界剩余可采储量的石油仅可使用40年左右，所以寻求替代能源将成为未来世界经济发展的关键。近年来，随着我国对能源投入力度的强化，能源供求矛盾得到有效缓解，但是能源结构性矛盾却日益突出，特别是我国石油供不应求的问题更为突出。甲醇是重要的化工原料,主要用于生产甲醛,作为甲基化剂,可 生产甲胺、甲烷氯化物、丙烯酸甲酯、甲基丙烯酸甲酯、对苯二甲二 甲酯等;甲醇羰基化可生产醋酸、醋酐、甲酸甲酯、碳酸二甲酯等。 此外甲醇还是性能优良的能源和车用燃料,作为未来的候补燃料,需求量十分巨大。此设计采用低压法甲醇合成的工艺流程，原料采用天然气为原料，甲醇合成气要求（H2－CO2）/（CO+CO2）=2.1左右，.合成气中还含有未经转化的甲烷和少量氮,显然,甲烷和氮不参加甲醇合成反应,其含量越低越好,但这与制备原料气的方法有关;另外,根据原料不同,原料气中还可能含少量有机和无机硫的化合物.为了满足氢碳比例,如果原料气中氢碳不平衡,当氢多碳少时(如以甲烷为原料),则在制造原料气时,还要补碳,一般采用二氧化碳,与原料同时进入设备;反之,如果碳多,则在以后工序要脱去多余的碳(以CO2形式)。天然气蒸汽转化法制的合成气中，氢过量而一氧化碳与二氧化碳量不足，解决这个问题的方法是采用添加二氧化碳的蒸汽转化法，以达到合适的配比，二氧化碳可以外部供应，也可以由转化炉烟道气中回收，增加了合成甲醇的有效气体组分。天然气进入蒸汽转化炉前进行净化处理清除有害杂质，净化后气体含硫量小于0.1mL/m3。转化后的气体经压缩去合成工段合成甲醇。粗甲醇中甲醇含量约80%,其余大部分是水，产品精甲醇的纯度可达99%以上。

Traditional oil and gas resources increasingly scarce, especially in the world remaining recoverable reserves of oil may use only about 40, to seek alternative sources of energy will become the future world economic development. In recent years, as China's energy input and the enhancement of energy supply and demand effectively ease the contradiction, but energy structural contradictions are increasingly prominent, in particular the issue of China's oil demand even more prominent. Methanol is an important chemical raw materials, mainly used in the production of formaldehyde, as methylation agent, can produce methylamine, methane chloride, methyl acrylate, methyl methacrylate, the two dimethyl benzene Methyl; methanol carbonylation can produce acetic acid, acetic anhydride, methyl, DMC, and so on. In addition methanol or excellent performance of energy and motor fuels, as the future of alternate fuel, is a huge demand. This design uses low-voltage methanol synthesis of the process, raw materials using natural gas as raw materials, methanol synthesis gas requirements (H2-CO2) / (CO + CO2) = 2.1 around. Synthesis gas also contains without a transformation of methane And a small amount of nitrogen, obviously, methane and nitrogen does not participate in the synthesis of methanol, Yuediyuehao its content, but with the preparation of materials relating to the methods of gas; In addition, according to different raw materials, raw materials also may contain gas of a small amount of organic and inorganic sulfur The compound to meet carbon hydrogen ratio, if the raw materials in the hydrogen gas carbon imbalance, when the hydrogen more carbon is low (such as methane as raw materials), then in the manufacture of raw materials gas, to fill carbon, the general use of carbon dioxide, and raw materials At the same time into the equipment; contrary, if the carbon, then the next process to take off his excess carbon (in the form of CO2). Natural gas steam reforming the legal system in the synthesis gas, hydrogen and carbon monoxide and carbon dioxide excessive insufficient to address this issue is to use carbon dioxide to add steam into law, so as to achieve the appropriate ratio of carbon dioxide can be an external supply, can also be transformed by the furnace smoke Road Recovery of gas, an increase of the effective methanol synthesis gas components. Front steam reforming of natural gas into the decontamination treatment remove harmful impurities, clean up after the sulphur content of gas is less than 0.1 mL/m3. After the conversion to gas compression of the Section of methanol. Crude methanol in the methanol content of about 80 percent, most of the rest is water, methanol fine products in the purity of up to 99%.