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Fax:
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Chemical Packing >>>
Structured Packing
>>>
Light Structured Packing
Series
of structured packing have been developed since 1972, applying in various
industries, e.g. chemical, petrochemical, fertilizer, fine chemicals
and environmental protection industries. Several patents of our
products or production were granted by national authorities.
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Light
Ceramic
Structured Packing |
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Light
structured packing is further developed on the basis of structured
packing, consisting of many single packing units, e.g. ceramic hollow
columns or hexagonal cells. A bigger unit is often combined by 7
packing units.
Because of unique structure of packing unit, compared to general
structured packing, there's much more specific surface area for Light
Structured Packing, which means better performance on the mass
transfer efficiency.
Generally, the density of light structured
packing is about
1.04g/cm3
and bulk density is
about 0.15-0.4g/cm3,
which are far lower than general structured packing's. As it's very
light in weight and very high in mechanical strength, it's not easy for
light structured packing to be crushed or to jam the flow of vapor.
For example, light ceramic structured packing is applied in the
tower of a gasworks in China. Due to operation error, a mass of mud was
brought to the top of tower and jammed it. According to early
experience, it's needed to change all packing in the tower. When opening
the tower, however, it's found only the first and second layers of the
light ceramic structured packing were jammed, other 178 layers were in
good condition and not jammed. Therefore, repairing
cost and time are saved. |
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In accordance with research result by Tianjin University, the mass
transfer coefficient for light ceramic structured packing is 2.2 times
of general ceramic structured packing. Its material is micropore
honeycomb ceramic, with masses of tiny micropores. And its installation
can also provide more interface for vapor and liquid. Therefore, the
effective area is over 99.5% for light ceramic structured packing, which
can ensure perfect separation efficiency.
With the characters of high chemical stability, high thermal stability and excellent heat
endurance over 1400°C,
Light Ceramic Structured Packing can resist high temperature, acid
(except HF), alkali, salt and
various organic solvents. Its useful life is very long.
Light structured packing can be cut easily and assembled a circular
plate. It's easy to install and can make full use of the plane to be
filled. Therefore, it can avoid effectively wall flow or channeling,
which are usually caused by interface between packing and tower wall.
It's also easy to clean and can be regenerated.
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Light structured packing is widely applied in various packing
towers of desiccation, absorption, cooling, washing, and regeneration in
industries of petrochemical, chemical, metallurgy, gas and oxygen
generation.
We can contract manufacture product in accordance with specification you
required. If any enquiry on
chemical packing, please feel free to contact us via
info@asiaron.com
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| Physical
Index |
|
Item |
Shape |
Subtense distance
(mm) |
Height
(mm) |
Distribution bed height
(mm) |
Hole
diameter
(mm) |
|
A125 |
Flower, seven holes |
200 |
105 |
10 |
56 |
|
A138 |
Flower, seven holes |
200 |
105 |
10 |
56 |
|
A150 |
Square, triangle holes |
220 |
105 |
10 |
50×3 |
|
A180 |
square, triangle holes |
220 |
105 |
10 |
50×3 |
Chemical Index |
|
Item |
SiO2
(%) |
Al2O3
(%) |
K2O
(%) |
NO2
(%) |
CaO
(%) |
MgO
(%) |
Fe2O3
(%) |
Ignition loss
(%) |
Acid resistance
(%) |
Alkali resistance
(%) |
| General structured packing |
75.48 |
18.9 |
2.7 |
0.95 |
0.82 |
0.12 |
≤1 |
0.54 |
99.8 |
98.7 |
|
Light structured packing |
65 |
28 |
2.7 |
1 |
0.8 |
0.12 |
≤1 |
0.8 |
99.8 |
96 |
Technical Data |
|
Item |
Surface area
(m2/m3) |
Void volume
(m3/m3) |
Bulk
density
(kg/m3) |
Number per cube |
Flooding velocity
(m/s) |
Pressure drop
(mpa/m) |
Theorical plate number |
|
A125 |
125 |
0.77 |
150 |
236 |
236 |
90-160 |
3-4 |
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A138 |
138 |
0.85 |
160 |
236 |
236 |
90-160 |
3.2-4.1 |
|
A150 |
150 |
0.90 |
180 |
189 |
189 |
90-160 |
3.8-4.5 |
|
A180 |
180 |
0.92 |
201 |
189 |
189 |
90-160 |
4.8-5.5 |
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Data comparison |
|
Item |
Bending strength
(Mpa) |
Hardness scale
(Mohs') |
Porosity
(%) |
Thermal stability
(℃
) |
Freeze thawing times |
|
General structured packing |
600-1000 |
>7 |
1-15 |
-25-600 |
≥60 |
|
Light structured packing |
600-1000 |
>6 |
1-25 |
-25-600 |
≥80 |
1 轻瓷填料比重轻、阻力小
轻瓷填料的密度为1.04g/cm3,堆比重为0.4g/cm3，远小于全瓷填料和金属填料的密度和堆比重，从而具有操作重量轻的优点。
作为规整填料，轻瓷填料在煤气通量为50000米3/小时的洗萘塔中，其干塔阻力小于50毫米汞柱，操作阻力小于100毫米汞柱，从而不容易造成堵塞，克服了散装填料易破碎、易堵塞的缺点。常州煤气厂于1992年采用轻瓷填料，在1999年的时候，该厂因一些 工艺问题导致大量硫泥带到塔内引起顶层泡沫分布层堵塔，原计划要发90多万元来更换填料，然而，出乎意料的是，轻瓷填料仅第1段上面第1、2层沾泥堵塞，其余各段的178层仍然完好不堵，结果更换填料数不及总填料的0.01%就解决了问题，为用户节约了大量检修资金和时间。
2 轻瓷填料传质系数大、有效面积大、效果好
通过天津大学对轻瓷填料性能的测定表明，轻瓷填料传质系数大，是全瓷填料的2.2倍。另外轻瓷填料在装填好后其相邻填料只有6个支撑腿重叠为无效面积，而且气液相传的形式是‘面’接触，再加上轻瓷填料系微孔蜂窝陶瓷，具有微孔面积和空间液滴面积，从而使得轻瓷填料的有效面积大于99.5%，分离净化效果极佳。与之相反，全瓷填料、塑料填料以及金属填料由于没有微孔，吸附性能不好，液体在塔内直流不挂液，滞留时间太短，气液相传的形式是‘点’或‘线’接触，其使用效果明显不如轻瓷填料。
3 轻瓷填料耐老化、抗腐蚀性能强、寿命长
轻瓷填料耐热性能良好，耐火度高达1400°C，且耐急冷急热，另外轻瓷填料的耐酸耐碱性能也非常优越，使用寿命长，不易老化。合肥煤气厂自85年使用轻瓷填料以来，至今还没有提出过要更换填料。与之相比，塑料填料的致命弱点在于不耐温，易老化，使用寿命短，而碳钢金属填料不适用于有腐蚀介质的场合，若改用不锈钢金属填料则又造价昂贵。
4 轻瓷填料结构新颖、可切割、装填方便
轻瓷填料系规整填料，可切割拼装成圆，不仅装填方便，而又能使整个填充平面得到100%的利用，其他规整填料由于不可切割，塔四周不可避免地有大小不等的空洞，壁流、沟流现象严重，不同程度地会影响使用效果 |
