So with the progress and development of the times, we will find that our lives are everywhere in the shadow of chemical products, and have become more and more inseparable from them. So chemical design is becoming more and more important. Chemical design is an important prerequisite for the production of chemical products. In other words, if there is no basis for chemical design, it lacks the basis of construction, lacks the prediction of production capacity, and can not make a correct evaluation of the economic indicators and safety indicators. Therefore, chemical design is the prerequisite for the high quality and high requirements of chemical products production.

1. Duty origin

This design refers to the study of ethyl acetate in acetaldehyde condensation, the data in the process magnification experiment, and the equipment and process of their experiments. Finally, I have designed and perfected the process. The purpose is to design the process of ethyl acetate by using the knowledge related to chemical process and chemical design, and provide reference conditions for the industrial production of ethyl acetate by acetaldehyde condensation method.

2. Principle

(1) Environmental protection: Chemical design should not only consider production efficiency, but also include good environmental benefits in important indicators.

(2) Security: Safety indicators for chemical design, is not only to consider the correctness of equipment design and placement, but also to ensure the safety and health of workers in their work.

(3) Economic benefits: Without affecting the process, the building is simplified, the arrangement of equipment is rationalized, and space and land are effectively used.

(4) Easy installation: The location is reasonable, making the transportation route between the materials the simplest and the shortest.

3. Main design standard

(1) Data of small scale experimental

Acetaldehyde purity               99.8%

The conversion rate of acetaldehyde  86.5%，89.1%

Ethyl acetate purity                99.8%

(2) Standard calculation

Ethyl acetate was produced at 99.8% purity per hour.

Key word: Ethyl acetate, acetaldehyde condensation, distillation column

目录

1 研究背景 1

1.1乙酸乙酯的用途 1

1.2乙酸乙酯的产量及我国消费情况 1

2 乙酸乙酯的生产工艺 3

2.1主要生产工艺 3

2.2工艺改进 4

2.2.1酯化法中催化剂的改进和精馏系统的改进 4

2.2.2乙醛缩合法中的工艺改进 5

2.3四种主要工艺方法的比较 5

3 研究意义与内容 7

3.1研究意义 7

3.2设计原理 7

3.3工艺流程 8

4 物料衡算 10

4.1数据采集 10

4.1.1全流程的工艺数据 10

4.1.2催化剂的配方 10

4.1.3操作条件 10

4.1.4原料和产品的控制指标 10

4.1.5物料平衡关系图 11

4.2一步缩合反应釜的物料衡算 11

4.3二步缩合反应釜的物料衡算 13

4.4单效蒸发器的物料衡算 14

4.5脱乙醛塔的物料衡算 14

4.6脱乙醇塔的物料衡算 15

4.7脱重组分塔的物料衡算 16

5 热量衡算 17

5.1基本数据 17

5.2一步缩合反应釜的热量衡算 17

5.3二步缩合反应釜的热量衡算 18

5.4单效蒸发器的热量衡算 19

5.5冷凝器的热量衡算 20

5.6脱乙醛塔的热量衡算 20

5.6.1再沸器的热负荷 21

5.6.2冷凝器的冷凝量 21

5.7脱乙醇塔的热量衡算 22

5.7.1再沸器的热负荷 22

5.7.2冷凝器的冷凝量 22

5.8脱重组分精馏塔的热量衡算 23

5.8.1再沸器的热负荷 23

5.8.2冷凝器的冷凝量 23

6 主要工段的设备选型和相关计算 24

6.1缩合釜的设计 24

6.1.1缩合釜体的设计 24

6.1.2搅拌装置的设计 25

6.2脱乙醛塔的设计与计算 26