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1 The source task
This design aimed at formaldehyde requiring us to design a reasonable process and choose the corresponding process equipments based on the study of professional basic course. Its purpose is to improve the ability of solving practical problem of the chemical products production workshop design ability and master the basic methods and procedures through chemical process design, material constant calculate, heat balance calculation，equipment selection and calculation . Through this course design, we can also improve the ability of using the design drawing of the computer.
2 Design Standards
Principle of design and main design standard
(1) data of small scale experimental
methyl alcohol conversion rate 63.14%
selectivity of methyl alcohol 71.53%
(2) standard of the calculation
Makes the datum by 1 day, according to 100% purity for methyl alcohol basis.
3 Design principles and key design indicators
Principle：
(1) Safe and reliable: the design of many chemical substances are flammable, explosive or toxic. Therefore, the design must be taken into account of all sorts of obvious and potentially dangerous and used strict regulations of national and local health and safety to ensure little environmental pollution and the health of production personnel.
(2) operation is simple: adhere to the scientific attitude to determine various production process and equipment and the operation condition reasonably, striving to achieve the mild reaction condition and low requirements of equipments and convenient operation of the workers as the result.
(3) reasonable economy: reduce equipment costs, raw material costs, labor costs and other aspects investment effectively and reasonably.
(4) easy to install: Plant layout should meet the requirements of the construction and installation, with emphasis to consider the installation of large equipment, factory and load road pavement construction and installation standards should meet the requirements.
(5) Basis of calculation:
Annual production of 30000 tons
Days to 300 days in，45 days for machine maintenance, 15 days mobile.
Keywords: formaldehyde; methyl alcohol; catalytic dehydrogenation; process calculation
目录
1 总论 1
1.1 概论 1
1.2文献综述 1
1.2.1 银法(甲醇氧化脱氢法) 2
1.2.2 铁钼法(甲醇单纯氧化法) 3
1.3 甲醛 4
1.3.1 甲醛的性质 4
1.3.2 甲醛的用途 5
1.3.3 世界苯甲醛概况 6
1.3.4 我国甲醛的生产的现状 6
1.4 主要原料性质及用途 8
1.4.1 甲醇 8
1.5 本设计的主要任务和目标 8
1.5.1 设计的任务 8
1.5.2 设计的目标 8
1.5.3 生产工艺条件 9
2 工艺流程设计 10
2.1 工艺路线及其基本原理 10
2.1.1 工艺路线 10
2.1.2 基本原理 10
2.2 主要反应方程式 11
2.2.1 脱氢反应 11