Wire Mesh Demister

Wire Mesh Demister (also is known as mist eliminator, demister pads) is a highly efficient gas-liquid separation device.

Features:

1. High collection efficiency of up to 99% of fluid at velocity of 1 to 8m/sec

2. Provides free area of up to 98% for operation and low pressure drop (0.1" ~ 1.0" W/G)

3. A variety of materials in accordance with temperature and corrosion resistance

4. Easy to install by using manhole. Usable without any restriction and replaceable with existing facilities

5. Designed for self - cleaning (semi - permanent and economical)

Operation Principle of Demister For example, gas from liquid (L) converts to vapors (V) in distillers. When vapors rise, the surface of liquid breaks to generate micro particles of liquid and deliver them with gas through demister. In this process, micro particles increas in volume due to inertial collision principle on the surface of pad. Particles that contain impurities free fall due to the weight of impurities. Gas come through demister or contain liquid particles release as pure gas to the top of demister.

Wire Material			Grid Material
Item	Code	Standard No.	Item	Code	Standard No.
Q235-A	Q235-A	GB434	Q235-A	Q235-A	GB327
20	20	BG3206	20	20	GB711
0Gr18Ni10Ti	321		0Gr18Ni9	304	GB423
0Gr17Ni12Mo2	316		0Gr18Ni10Ti	321
00Gr19Ni11	304L		00Gr17Ni12Mo2	316
00Gr17Ni14Mo2	316L		00Gr19Ni11	304L
RS-2	RS-2	Steel Grades	00Gr17Ni14Mo2	316L
NS-80	NS-80		Non-metal Materials: PTFE (F6) polyethylene, polypropylene, Nylon yarn, fiber, and PVC and others Note: we can use other materials, but please specify when ordering
NS-80A	NS-80A
brass wire	H68 H65 H62	GB3100
Tin-copper wire	QSn	GB3128
Nickel	N4 N6 N7 N8	GB3120
Titanium and titanium alloy	TA2 TA3 TC3 TC4	GB3823

Models Construction and Application:

Consists of a mat with overlapping knitted metal or plastic wire meshes, which are assembled in accordance with density for each style and disposed altemately. The assembled mat provides complex and refined structure for inertial impaction, so it provides free area of 98% for operation and low pressure drop.

Style	Applications
DSM-80	Provides low pressure drop at high velocity and general collection efficiency. Used for collecting lager particles.
DSM-144	Mainly used in the field of petrochemical plants. Provides relatively low pressure drop and collection efficiency of up to 90~99%
DSM-193	Most commonly used. Provides collection efficiency of up to 98~99% on 5~10 microns at velocity of 1~5m/sec.
DSM-390	Provides high pressure drop at low velocity of 1m/sec and collecion efficiency of up to 90% or greater.
DSM-220	Used for collecting minute particles sized for 1 micron, Thicker is better in case of minute particles with low density (approximately 10g/m3)
DSM-432	Used for collecting sub-micron particles 0.05~1 micronc More effective than DS-220 Style

Selection of Demister

The below table as standard style has selected through referred articles, practical consumers and the company research for most suitable type according to the broad ranges of usage for DEMISTERSMS recently. It helps to identify basic type for use and refer to change of specifications as standards.

	DENSITY(kg/m3)		FREE AREA(%)		SURFACE AREA(m2/m3)		EQ.STYLE
	SUS	P.P	SUS	P.P	SUS	P.P	YORK	NIHON MESH	GOTO SHOJI
DSM-80	80	30	98.9	96.7	155	495	931	H	H155
DSM-120	120	-	98.5	-	210	-	631	L
DSM-128	128	-	98.4	-	460	-	326	SN
DSM-144	144	38	98.2	95.8	275	630	431	N	S275
DSM-193	193	42	97.6	95.4	378	690	421	SL	S370
DSM-300	300	-	96.2	-	575	-	-	SM
DSM-390	390	-	95	-	740	-	-	SH	S740
DSM-220	220	-	97.2	-	905	-	-	T	M905
DSM-432	432	-	94.5	-	1,780	-	800	R	M1740
DSM-GRASS	160	80	96.7	94.7	5.000	-		G.S/G.P

Installation and Grid

DEMISTER in tower must be fixed and supported at level and Support Grid is commonly used for fixing bottom side or the upper and lower sides, which was made by welding FB 25x3t. RB6 (the same material with DEMISTER PAD) at regular intervals (APP 150mm). In addition wire of diameter 1 or 1.6 is used for fixing GRID and PAD and how to fix them as follows.