Coking
industry filter bags materials selection solutions
As
one professional coking
industry filter bags supplier, SIIC introduces you coking industry filter bag
material selection solutions as followings:
Characteristics
of flue gas in Coking Industry:
(1)
the air temperature of coke oven flue is relatively low, which is 180~300
degrees Celsius, most of which are at 200~230 degrees Celsius.
(2)
The SO2 content in flue gas of coke oven ranges from 60 mg/m3 to 800 mg/m3, and
the NOx content varies greatly from 400 mg/m3 to 1200 mg/m3.
(3)
The flue gas components of coke oven flue flue fluctuate periodically with the
operation of coke oven hydraulic exchanger, and the differences between the
peaks and troughs of SO2, NOx and oxygen contents in flue gas are large.
Fiber
selection characteristics:
Polyimide (P84)
fiber:
1) With significant
temperature resistance, which can work at 260℃ for a long time, and the instantaneous
temperature can reach 280 ℃.
2) It can withstand
high filtration velocity, good acid and alkali resistance, corrosion resistance
and oxidation resistance, and has a certain degree of hydrolysis resistance.
3) Wear resistance,
acid and alkali resistance, strong corrosion resistance.
4) The sectional
shape of the three leaves makes the filtration precision high, the surface
finish is good, and the pressure difference is small.
PTFE fiber:
PTFE fiber, commonly
known as the king of plastics, has excellent chemical stability and corrosion
resistance, which can improve the chemical erosion of filter media. It is with
excellent temperature resistance, continuous use temperature of 260℃, instantaneous 280℃.
Water content varies
greatly: 5% to 17.5%.|
Item
|
Pure PTFE laminated PTFE filter felt
|
PTFE compound filter material
|
|
|
Layer
Fiber
|
PTFE
|
PTFE+P84
|
|
|
Support
Scrim
|
PTFE
|
PTFE
|
|
|
Weight(g/m2)
|
750
|
650
|
|
|
Working
temperature (Continuous) ℃
|
260
|
260
|
|
|
Working
temperature (Surge) ℃
|
280
|
280
|
|
|
Tensile
Strength（N/5*20cm）
|
Warp
|
＞800
|
＞800
|
|
Weft
|
＞1000
|
＞1000
|
|
|
Elongation
(%)
|
Warp
|
＜20
|
＜30
|
|
Weft
|
＜40
|
＜50
|
|
|
Air
permeability
(m3/m2*min
at 127mm H2O)
|
2~5
|
12~16
|
|
|
Air Flow
(Air cloth ratio)(M/Min)
|
＜1.0
|
＜1.2
|
|
|
Applications:
|
Occasions with high
temperature resistance, oxidation resistance, excellent acid base corrosion
resistance, high humidity and high filtration accuracy.
|
It is suitable for the
occasion of high temperature resistance, oxidation resistance, acid-base
corrosion resistance, general hydrolysis resistance, high dust concentration
and high filtration accuracy.
|
|
|
Note: The above
parameters and selection are based on the conventional flue gas conditions of
our company for the design of the program, reflecting the performance of the
product.
The selection and
design of exact cases need to be according to the exact working conditions.
|
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