精馏塔苯和甲苯

操作与维修费用等技术经济评价

以及设计经验等因素

,

依矛盾的主次

,

综合考虑

,

选择适宜的塔型。

关键词：

苯

甲苯

分离过程：精馏塔

Abstract

This

course

is

designed

for

separation

of

benzene

and

methylbenzene

by

distillation column, taking distillate continuous distillation has high purity, according

to the design conditions have been given, we select the operating conditions of bubble

point feed operation pressure is 4Kpa, the specific equipment selection of sieve plate

tower,

plate

tower

has

the

advantages

of

simple

structure,

low

cost,

efficiency

the

advantages, but not easy to be blocked, the viscous, dirty and solid particles of liquid.

According

to

the

requirements

of

the

design

process,

the

structure

size

of

the

distillation

column

was

calculated

and

correlated

with

the

fluid

mechanics

and

the

calculation of the nozzle main requirements of tower equipment industry: (1)

gas

(steam),

liquid

processing

capacity,

production

capacity

is

large,

still

without

entrainment,

a

liquid

blocking

or

flooding

damage

operation

phenomenon.

(2)

the

operation

stability,

flexibility,

i.e.

when

the

tower

equipment

gas

(steam),

liquid

loading

of

a

wide

range

of

changes,

still

can

stabilize

the

operation

in

the

mass

transfer

efficiency

under

the

conditions

of

high

reliability

and

should

ensure

long-term continuous

operation must have

the.(3) the fluid

flow resistance is

small,

the fluid flow through the device of the small pressure drop, which will greatly reduce

the

power

consumption,

thereby

reducing

operating

costs.

For

vacuum

distillation

operation, too much pressure drop will make the entire system can not maintain the

necessary vacuum degree, the ultimate failure of the operation of the system. (4) the

structure

is

simple,

the

material

consumption

is

small,

and

the

manufacture

and

installation

are

easy.

(5)

corrosion

resistance

and

not

easy

to

plug,

convenient

operation, adjustment and maintenance. (6) retention tower to be small.

目

录

摘

< /p>

要

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