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There are several types of cold insulation materials for air separation equipment and their characteristics

There are several types of cold insulation materials for air separation equipment and their characteristics
Nov 17, 2023
Author: DEAR AST

The commonly used cold insulation materials include magnesium carbonate, glass wool, pearlescent sand, and slag cotton, and their characteristics are shown in the table below:

Name, brand

volume, mass

/kg·m-3

 thermal conductivity

/W(m·K)-1

specific heat capacity/

kJ(kg·K)-1

Other characteristics

Magnesium carbonate

400

130

0.05~0.07

0.03~0.04

1.00

1.00

requires a moisture content not greater than2.5%

 

Glass wool

130

0.047

0.84

diameter3~30μm

Expanded perlite

(Pearlescent sand)

≤80(Grade1)

150(Grade2)

0.04~0.058

0.04~0.05

0.67

0.84

grain size below1mm以下90%;1~2mmgrain size below10%;

Moisture content not greater than0.5%

mine

residue

Cotton

100

150

200

≤100

≤150

≤200

0.044

0.038~0.047

0.033~0.052

0.75

0.84

0.84

 

Moisture content not exceeding2%

 

 

Due to its light weight, good cold insulation performance, lower price, good fluidity, and ease of filling, pearlite sand is currently mainly used as a cold insulation material in equipment. A layer of slag wool can be installed at the bottom of the box, and slag wool or glass wool should also be installed in local compartments that often require maintenance.

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