ACS Mist Eliminators

Strong Acid System - Mist Eliminators - Mesh Pads - ACS Industries
September 23, 2002

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Introduction ACSMeshPad.JPG (18100 bytes)

ACS Industries provides mesh pads in a variety of styles and materials to cover all applications in a sulphuric acid plant. ACS offers the latest innovative designs for mesh pads from the composite-knit (co-knit) pads to the high-capacity Mist-Master® mesh pads.

To aid in the installation of the final sections of a large mesh pad, ACS provide an Adjustable Cross-Section - A.C.S.™ grid which can be compressed by tightening several bolts on the support grid. The compressed pad is inserted and then the bolts are loosened off to allow the pad to expand back to its original size. The A.C.S.™ grid is a unique feature for which a patent has been applied.

ACS produce their own wire and fabricate and assemble the complete pad. They also produce the mesh for other mesh pad suppliers.

MistMaster.JPG (11659 bytes)
The Mist-Master® mesh pads use a patented technique to enhance the drainage of liquid from the pad thus preventing flooding of the pad and liquid re-entrainment at high vapour and liquid loads. As liquid and vapour loads increase, a layer of collected liquid tends to form at the bottom of the pad. The gas flow through the pad actually impedes drainage of the collected liquid from the pad.

The Mist-Master® mesh pads consist of a conventional pad with tightly rolled cylinders of mesh about 90 mm (3 1/2") in diameter fastened to the bottom of the pad. The 'Coanda' effect steers the liquid in the pad to the tightly rolled mesh cylinders where it can drain more easily from the pad. The liquid surface tension allows streams of liquid falling through the roll to draw liquid from the upper sections of the pad. The result is that region between the rolls becomes relatively free of liquid. The capacity and efficiency of the pad is increased and the pressure drop through the pad is lowered.

Products

The most commonly specified styles of ACS mist eliminators are shown in the following table.

Type	Style	Density lb/ft³	Wire Diameter inches	Surface ft²/ft³	Voidage %
Metal	7CA	5.0	0.011	5	99.0
	5CA	7.0	0.011	65	98.6
	4CA	9.0	0.011	85	98.2
	4BA	12.0	0.011	115	97.6
	3BF	7.2	0.006	120	98.6
	3BA	12.0	0.006	200	97.6
Plastic	8P	4.0	0.011	130	92.0
	8K	4.0	0.011	160	96.3
	8T	4.0	0.011	130	97.0
Metal Based Co-Knit	8D	9	0.0008	615	97.5
	8TMW11	12	0.0008	1170	96.2
	6BE	9	0.000036	3725	96.3
Plastic Based Co-Knit	8PP	3	0.001	480	94.7
Plastic Based Co-Knit	8TT	5	0.0008	1240	91.1

Other varieties are available for special requirements. The standard pad thickness is 100 mm (4 in) and 150 mm (6 in). All styles are available with the Mist-Master® high-performance drainage system.

Contact

ACS Industries, Inc.
Separations Technology Division
14211 Industry Road
Houston,Texas
USA 77053

Telephone:     (713) 434 0934
Toll Free:       1 800 231 0077
Fax:               (713) 433 6201


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