4工艺计算
物料衡算
在整个设计过程中，首先由目标产量采用倒算的方法计算得实际生产中的投料量。根据每日投料消耗量进行物料配置。按工艺流程，物料衡算共分为以下三个部分：甲基化反应、Na2CO3吸收、 NaOH吸收过程。计算每个部分的进料量、出料量，并换算其摩尔数、体积等相应数据。估算损失的产品量，预算应得产品的质量。
在进行物料衡算的时侯，每一步的计算都必须非常的仔细，因为每一步的反应的物料的量和下一个反应的物料的量都是有关的，所以一旦其中某个环节计算错误，那么意着很有可能后面所有的计算都需要重新进行计算，这将需要花费很多的时间。
热量衡算
热量衡算同样也是我们设计任务书中的一个主要部分。
热量衡算包括四个核算部分：配碱热量、甲基化反应过程、冷凝器热量变化、Na2CO3吸收、 NaOH吸收过程的热量计算。通过应用卡拉奇公式对反应热的热量平衡进行计算，定压摩尔热容及燃烧热数据等都通过《化工工艺设计手册》及相应公式进行估算。从而计算出生产过程能耗指标，以选定先进的生产工艺。
3.设备选型
我们对反应器进行选型和传热面积的校核，绘制并绘出其装备图。
本设计依据于教科书的设计实例，对所提出的题目进行分析并做出理论计算。
对以下几个过程设计反应釜：NaSH配料锅及夹套、冷凝器的选择、Na2CO3反应锅和吸收塔、 NaOH反应锅和吸收塔、以及尾气吸收装置
5非工艺设计
从土建方面要求和环保方面-三废处理进行考虑，结合甲硫醇钠生产工艺流程的特点，进行非工艺方面的设计。
Design Specification
1 Overview
Design : process design and production of an annual output of 1500 tons of sodium methyl mercaptide.
To design annual production capacity of 1500 tons per year of sodium methyl mercaptide process,with sodium hydrosulfide, sulfuric acid two ester as raw material, in the atmospheric heating to 75 ℃ stirring and refluxing synthesis of methyl mercaptan methyl mercaptan, sodium bicarbonate absorbs the by-product - hydrogen sulfide and moisture at 70℃, react with the sodium hydroxide sodium methyl mercaptide process route. Selection of optimal scheme for industrial production, and demonstrates the feasibility of industrial scale production.
The main design content in:Firstly, design scheme was put forward and proved the feasibility of A. technologies: B. economic rationality.Secondly, Design of focused primarily at: the whole process of material balance, caloric, equipment design and selection.Thirdly: process design, process design, including the main process equipment, pipe fittings, control scheme, control point. Workshop equipment layout. All kinds of process drawing material flow chart, take control of the process flow, equipment layout. A process design considering construction requirements, logistics solutions, environmental program.
Key words: methyl mercaptan, sodium methyl mercaptide, synthesis, process
Sodium methyl mercaptide (sodium methyl mercaptide), molecular formula: CH3SNa, liquid alkali solution, fetid odor, soluble in water, soluble in methanol, but insoluble in ether. A case of acid or absorption of carbon dioxide in the air the decomposition of methyl mercaptan gas, flammable, explosive, toxic. Smelly appearance is colorless transparent liquid,, strong alkaline liquid, can be used as pesticide, medicine, dye intermediate raw materials (such as synthetic pesticides Mei-dowei), hydrogen sulfide poisoning antidote.
Synthetic technology of sodium methyl mercaptide improvement is focusing on R & D to promote clean technology, reduce environmental pollution, increase the ability of sustainable development, the purpose is to improve product quality and reduce production cost. 年产1500吨甲硫醇钠的生产工艺设计+文献综述(2):http://www.751com.cn/huaxue/lunwen_4331.html