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Wire-mesh demister
Mesh demister (or named mesh mist eliminator) is used to gas entrainment fog (droplet) remove, recycle expensive droplet (precious materials), or purification of gas to reduce gas impurities. Mesh mist eliminator is 0.15mm~0.25mm corrosion-resitant metal wire or PP, PTFE and other engineering plastics using a special wire woven wire mesh jingwei way, and then pressed into a mesh-type wave (Wtype) formed after the cross-stack shop.


  • Wire-mesh demister

  • Wire-mesh demister

The principle of wire-mesh demister
In the general operation of chemical industry, the dispersed drops in the gas, as usual, is with the diameter about 0.1~5000μm. For the drop diameter above 100μm, it can be solved easily because of its high sedimentation. For the drops diameter above 50μm, it can be separated by gravitational settling method, and, for the diameter above 5μm can by inertial impaction & centrifuge method. But, for the drops diameter is less than the 5μm, it will be congregated lager diameter, or be separated by using fiber filter or static demister.

Wire-mesh demister(or named mist eliminator), mainly used to separate drops of the diameter within 3μm to 5μm, the operating principle as shown by the graphic as above, it is, when the gas carrying liquid foam is rising on a certain speed and passing through the wire mesh pack on the grid bar, because of the inertia, the liquid foam will be collided with and adhered to the metal wire surface, with diffusing and subsiding continuously, it will be form a bigger liquid drop and flow to the wire cross along the wire. Because of the wire humidified, the liquid surface tension and the capillarity capillary action, the liquid drops will be bigger and bigger, till separated and fall down when its own weight exceed the resultant force come from both of buoyancy of the rising gas and surface tension of liquid. As the end, it flow into the container for next device. With the proper gas speed and other operation conditions, the efficiency of foam remove will be up to 97% high after the gas pass through wire-mesh demister. The purpose of removing foam will be achieved completely.
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The characteristic of wire-mesh demister
• Structure simple, weight light.
• High factor of porosity, low head loss.
• Great contact surface area, high removing foam ratio.
• Convenience of installing, operating and repairing.
• Long service life.

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China standard of wire-mesh demister
⒈ HG5-1404(1405、1406)-81
The new standard units includes three installing modalities: ascension pipe type, reduction diameter type and full diameter type. The diameters of the wire mash demisters are ranging from about 300mm to 6400mm, and the height of the wire-mesh has two alternates: 100mm or 150mm. Only type number and required material are requested when ordering.

Standard number demonstration: HG5-1406-81-11, 304/304.

It expresses wire-mesh demister: both the grille and the wire-mesh are used stainless 304,full diameter type and up-stalling, diameter is 1600mm,height is 100mm.

⒉ HG/T21618-1998
The new standard unites the three installing modalities of ascension pipe type, reduction diameter type and full diameter type, puts forward four types of meshwork, namely SP、HP、DP and HR, expands the variety of the material to be used . It increases more types in size.

standard number demonstration:HG/T21618 wire-mesh demister S1600-100 SP 304/304

It express wire-mesh demister: both the grille and the wire-mesh are used stainless 304, up-stalling,diameter is 1600mm,height is 100mm,and the mesh type is SP.

3. HG/T21586-98 (drawer wire-mesh demister)
This standard is mainly applied in the situation in which the components of demister need clean and replace frequently. For example, the drying tower and the absorbing tower of vitriol devices. There are totally 56 types of general diameters to choose, ranging from DN300mm to DN5000mm. Only type number and material are requested when ordering. (Among these, 316L, NS-80 as well as RS-2 are materials for mesh on vitriol devices.

standard number demonstration:HG/T21586.11-98 WME-1600-100 NS-80/Q235-A.

It represents drawer wire-mesh demister: Material of the wire-mesh is NS-80, grille is carbon steel bar of which diameter is 1600mm, height is 100mm.
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Other non-standard wire-mesh demister
Our company can also make a great variety of special shape wire-mesh demisters according to the clients' requirement, such as wave type, embedding type, outside-loaded type, SWD1 type, square type, rectangle type and abnormal type, etc. The height and interval of the wire-mesh demister can be altered according to the clients' demand.

Our factory will provide charts of bearing hardware and the installation charts of wire-mesh demisters to every client who choose china standard.

上装式丝网除沫器下装式丝网除沫器
Material of Wire-mesh demister
Wire-mesh demisters produced in our company have three kinds according to material: metal, nonmetal and metal knitting with nonmetal.

材质

国标代号

国外代号

标准号

Q235-A

Q235-A

GB343

20

20

GB3206

0Cr19Ni9

304

GB4240

00Cr19Ni11

304L

0Cr17Ni12Mo2

316

0Cr17Ni14Mo2

316L

0Cr19Ni10Ti

321

0Cr19Ni13Mo3

317

0Cr25Ni20

310

1Cr25Ni20Si2

310S

00Cr20Ni25Mo4.5Cu(N08904)

904L

0Cr23Ni13

309S

NS-80(1Cr18Ni11Si4AlTi)

 

厂商代号

RS-2

 

黄铜丝

H68、H65、H62

GB3110

锡青铜

Qsn

GB3128

镍丝

N4、N6、N7、N8

GB3120

钛丝及钛合金丝

TA2、TA3、TC3、TC4

GB3623

聚氯乙烯

PVC

 

聚乙烯

PE

 

聚丙烯/丙纶

PP

 

聚四氟乙烯(F4)

PTFE

 

四氟乙烯与六氟丙烯共聚物(F46)

PE

 

其他氟材料系列

PFA、ETFE、PVCF etc.

 

哈氏合金(20合金)

Hastelloy alloy

 

因科镍

Inconel

 

蒙乃尔 (蒙耐尔)

Monel

 

四氟乙烯与六氟丙烯共聚物(F46)

PE

 

金属与玻璃纤维(无、中碱线)交/混织

S.S & Fiberglas.

 

金属与非金属丝交/混织

S.S & PP.PVC.F46.etc.

 


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