In short, the chemical design in the new plant construction, transformation of the old factory play a key role, there are chemical production where chemical design。1,the source of the task 。

The design task is the use of acetaldehyde condensation method, the main production equipment in the process of material accounting calculation and energy balance calculation, while the distillation of ethyl acetate distillation column, the reactor design and selection。 The equipment is selected according to the design requirements。 For acetaldehyde tower, the column pressure is atmospheric pressure, reflux ratio R = 3, assuming operation: XD = 0。99, XW = 0。01。 According to the corresponding formula, the actual number of plates is 56, the tower height is 22。4m。 The size of the tower body design: distillation section: weir length of 396mm, the export weir height of 48mm, weir width of 396mm, downfall the bottom of the height of 51mm; distillation section: weir length of 396mm, export weir height of 48mm , Weir width 75。6mm, downfall bottom clearance height of 42mm。 Reactor Select Continuous Mixing Type Reactor: According to the formula, the reactor cylinder height is 3520mm, the reactor cylinder and the head diameter are 2200m, and the inner cylinder thickness is 10mm。 When calculating, first, according to the production process requirements, characteristics, refer to the relevant process, draw out its process flow chart, and then according to the process of calculation, structural design information data to draw the main equipment map。 Design should not only meet the safety of production, but also economic and reasonable。

2。The design reference standard the top of the form

A。 Steel pressure vessel (GB150)

B。 Shell and Tube Heat Exchanger Standard (GB151)

C。 Steel Tower Containers (JB / T4710-2005)

D。 Selection of steel chemical container materials (HG 20581-1998)

E。 Calculation of strength of steel chemical containers (HG 20582-1998)

F。 Structural design for steel chemical containers (HG 20583-1998)

G。 Mechanical mixing equipment (HG / T20569-94)

H。 Chemical Pipeline Design Code (HGJ8-87)

3。Small test data

One step condensation conversion rate: 86。9%

Two-step condensation conversion rate: 89。3%

Selectivity: 99。87%

4。 Calculate the benchmark

Calculated as 100% purity for 1 day production。

5。the physical and chemical properties of raw materials

Table 1-1 Summary of the physical and chemical properties of acetaldehyde

Chinese name acetaldehyde molecular weight 44。05

Chemical formula CH₃CHO English name acetaldehyde

CAS access number 75-07-0 Boiling point 20。8℃

Appearance colorless and easy to flow liquid density 0。7834

Flash point -39℃ EINECS

access number 200-836-8

Melting point -121℃ Water-soluble soluble in water

Alias Acetaldehyde

Key word：Keywords ethyl acetate; acetaldehyde condensation; distillation column; process flow chart

目  录

1 概述