Mass Transfer Trays
Leading position by patented developments

Mass transfer trays made by Montz play essential part in the thermal fractionating technology in chemistry and related industries. Experience gathered through many years and a steady development led to patented tray designs which have made Montz a leading manufacturer of trays. Apart from a comprehensive standard offer of products Montz also prove their efficiency by customized designs adapted to the special requirements of the customers.

Tunnel trays designed as a plate stack for insertion into the column. Sealing between tray and column wall is effected by means of a coil spring which has been inserted into a circumferential groove.

Tunnel Trays

The well-known Montz program of trays playing an essential part in thermal fractionating technology, consists of the following patented types of trays:

Thormann Trays
 Tunnel Trays
 KSG-Trays

The program is completed by:

Bubble cap trays
Sieve trays
Dual-flow trays
Cascade trays

A speciality offered by Montz
are special designs exactly
adapted to the prevailing
problem in fractionation.
This includes:

Trays with cooling resp. heating coils
Trays featuring an extremely low
   entrainment
Trays with high hold-up times and
   of high liquid capacity

Thormann Trays
Montz Thormann® Trays with
cooling coils for a reaction colum

All of the Montz trays are subject to a quality control carried through on our own air-water-test equipment. Particularly in case of special designs it is of decisive importance to check and optimize the function mode. This is why Montz can guarantee highest quality and efficiency for the conventional program of trays as well as for special developments.


Montz-Thormann® Tray
Washing processes and vacuum distillation for low flows of liquids

The Thormann® tray has been designed as a tray for washing processes and vacuum distillation. It handles even the lowest liquid flows,e.g.40 l/m 2 /h with a simultaneous small pressure drop of approximately 1 mbar per tray.


Thormann® tray DN 3400 mm,one piece,made of titanium.This tray is of a leakproof design and is intended for use in an HCI-absorption column made of GRP.
The arrangement of the caps combined with the special vapour slots ensures a controlled flow of the liquid on the tray and consequently a favourable hold-up time and a high separation efficiency.
Thormann® caps with the characteristic vapour slots for a controlled vapour flow into the liquid.


Features:
Suitable for low liquid loads
   (approx.40 l/m 2 /h)
No trickling down of the liquid
Extremly low pressure drop of
   approx.1 mbar per tray
   (are possible)
Extremely high tray efficiency
High flexibility
Leakproof tray design
   (e.g.for washing processes)
Customised designs for special
   applications


Applications:
Washing processes, for example
   caprolactam, HCI, H 2 S
Hold-up time trays for reactions
Natural gas drying
Fractionating of fatty acids
Rectisol washing process

Materials:
High-grade steels, e.g.304, 410S, 316,
   316Ti, 316L, 904L, etc
Hastelloy C4, aluminium, copper,
   titanium, monel and others.
Plastic materials: KERA, Diabon, PVC and others


Thormann® hold-up tray DN 2500 mm for long dwell time in a reaction column with a liquid level of 200 mm and for small gas flows volumes. Cross section of Thormann® caps and vapour risers.A very good separation efficiency is achieved with even minimum amounts of vapour because the bent edges of the vaporisers prevent the liquid from trickling down.


Montz Tunnel Trays
Adaptable and sturdy

The tunnel tray is a very sturdy modular design developed by Montz. The modular design ensures a high stability at low weight an consequently economic advantages compared to conventional designs.The variable elements enable a multitude of constructive designs and adaptation to all operating conditions.


Peculiarities
The tunnel tray manages standard separating processes as well as those with heavy contamination. Low susceptibility to fouling and contamination and a long service life are the main characteristics of the tunnel tray.Montz has extensive know-how in the use of tunnel trays under the severest operating conditions.


Applications
Absorption
Glycol recovery
Treatment of liquids
Natural gas drying
Coking plants,deacidification plants,NH3
Stripper
Fractionating columns
   for absorption refrigerating plants
Mash columns

Characteristics
Suitable for mass transfer under
   vacuum,standard and excess
   pressure
High separation efficiency
Low pressure drop
Wide range of operation
Simple installation through manhole
Easy and problem-free cleaning by
   means of steam or liquid jets
Customised designs for special
   applications

 Materials
high-grade steels
   e.g. 304, 410S, 316, 316Ti, 316L, 904L, etc
Hastelloy C4, aluminium, copper,
   titanium, monel and others
Plastics: KERA, Diabon, PVC and others


Montz tunnel trays of special
design,made of aluminium

Caps for tunnel trays of various
designs

Cross-Flow Tray Type KSG
A high performance tray without any moving parts

The Montz cross-flow tray type KSG has been designed as a mass-transfer tray with the same efficiency as a valve tray but without any moving parts.It is thus ideal for the conversion of existing columns and for multi-purpose distillation.

The familiar collision of opposed vapour flow currents is avoided by the special design of the Montz high-efficiency tray:adjacent outflow cross-sections intersect at an angle of 90 °.This has a positive effect on the rate of entrainment of the tray. Moreover,the design of the vapour channels with rounded edges ensures a low pressure drop of the tray.

This type of tray is used for distillation and absorption.On account of its wide range of loading it is also particularly suited for the revamping of existing columns to increase throughput.It has also stood the test for multi-purpose distillation columns.
Cross-flow tray DN 4400 with two passes.
The tray elements are installed through
raised manholes and are fixed by clamps
atsupporting rings inside the column.

Aerodynamic design of the
vapour slots to ensure a low
pressure drop.
Principle of crossing steam
flows and arrangement of the
KSG-caps above the vapour slots



Julius Montz GmbH, Postbox 530, D-40705 Hilden, Tel. 0049/ 2103/ 894-0, Fax 0049/ 2103/ 894-77