自回热精馏技术在甲醇钠生产中的应用.pdf

第38卷第3期
能源化工
2017年6月
nergy Chemical Industry
un.2017
节能与环保
自回热精馏技术在甲醇钠生产中的应用
彭涛,全晓宇,韩波
(江苏乐科节能科技股份有限公司,江苏靖江.214500)
摘要:针对破法产甲醇钠工艺存在能耗高的缺点,提出了基于自回热精馏技术的破法生产甲醇
钠新工艺。在新工艺中,精馏塔塔顶甲醇蒸汽不经冷凝,一部分由压缩机乐缩后直接送往反应塔塔底参
与甲醇钠的反应和水蒸气的汽提;另一部分由乐缩机压缩升温升压后送往精馏塔塔再沸器作为再沸
器的加热热源。在不改变原生产工ど参数的前提下,自回热精馏系统大大节约了原系统所消耗的新鮮
蒸汽和循坏冷却水,大幅降低了甲醇钠的生产成本。工程实践的结果表明:对于1万レa的破法甲醇钠
生产线,采用自回热精馏技术对原系统进行改造,改造后可平均节约能耗成本约900万元/a,每年可节
约标煤4400t,大大降低了碳、硫等污染物的排放,有较好的经济效益与社会效凎
关键词:甲醇钠蒸汽压缩节能自回热精馏
中图分类号:T223.21
文献标识码:A文章编号:2095-9834(2017)03-0077-04
Application of the self-regenerative distillation technology in
the production of sodium methoxide
PENG 140, QUAV Xiaoyu, LA Bo
(Jiangsu Leke Energy-conservation Technology Co, Ltd.,Jingjiang 214500, China
Abstract: Aiming at the defect of high encry consumption existing in the production of sodium methoxide by alkali process, the
new process of producing sodium methoxide based on sef-regenerative distillation technology is proposed. In the new process, methanol
vapor is sent out from the top of the distillation column without condensation. After compression, part of methanol vapor is sent to the
bottom of reaction column to take part in the sodium methoxide reaction and steam stripping, the other part, with higher temperature
and pressure after compression, is sent to be the heat source of the kettle reboiler of the distillation column. Due to the consumption re
duction of vaopr and cooling water, the cost of sodium methoxide production is dramatically reduced without changing other process pa
rameters of the normal process. The result of the industrial praetice shows that to a 10 000 t/a sodium methoxide production line, the
new process saves about 9 million Yuan of energy costs and 4 400 t standard coal per year, which greatly reduces the discharge of pollu
tants such as carbon dioxide and sulfides, and generates better economic and social benefit
Key words: sodium methoxide; vapor compression; energy conservation; self-regenerative distillation.
甲醇钠是一种成熟的化工产品,在我国已经有钠与甲醇反应生成甲醇钠和水,在实际生产中通过
几十年的生产历史,主要用于生产维生素A、维生素反应精馏装置来生产,因其可逆性强,转化率较低,
B,、长效磺胺、磺胺嚀啶、甲氧苄胲喀啶等药品,也可需要不断移除反应生成的水,能耗较大,但原料价格
用于农药工业等领域,还可用作催化剂和分析试剂便官且生产过程相对安全。鉴于碱法生产甲醇钠的
等リ。日前工业上生产甲醇钠主要有钠法和碱法2
种生产工艺。金属钠法采用金属钠与甲醇反应制取
甲醇钠,工艺简单,转化率高,但金属钠价格昂贵,且收稿目日期:2017-0-0
作者简介:彭涛(1965-),男,甘肃大水人,本科,高级工程
反应放热量较大,同时生产过程中产生大量氢气,操师,现主要从事能源动力工程技术方面的研究工作。E
作过程不丸较大的危险性。碱法采用氢氧化ma: I(a isleke. com