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Manual Pury 250e
Introduction
Manual Pury 250e 2006-06-08
7
2. Introduction
2.1. General
information
Sample gases found in industrial processes are often saturated with water and
contain dust and other components undesirable to the measurement process. The
Pury 250e gas purification system dries and cleans gas in such a way that it can be
processed for measurement in a CWD2000 gas calorimeter or other on-line process
analyzers.
Undesirable components may include:
Dust
Naphtha
Hydrogen Sulfide
Water
And other additional components such as oils, tars and acids.
The components will differ depending on the family of gases, and the unit is in
primarily designed for use with coke oven and blast furnace gases. Naturally, other
gases can be dried and cleaned. Special applications may require the supply of a
heated sample gas line or additional filtration.
The Pury 250e consists of a stainless steel heat exchanger that cools the process
gas to between 1 and 5 °C. The water removed from the sample gas by
condensation is collected in a container and is drained using a peristaltic condensate
pump. The refluxed water dissolves acid and removes dust in the sample gas by
creating small droplets on the stainless steel filter elements.
The cooling system of the Pury 250e is connected directly to the process gas line. If
the process gas is saturated with water at higher than ambient temperature, then a
heated line should be installed to avoid condensation and possible blockage in the
line.
The optimum conditions for use are within an ambient temperature range of +5 to +
45 °C. Beyond these limits, the system efficiency is reduced and below 0°C there is a
real risk of damage from the condensate freezing.
Maintenance of the Pury 250e is simple and limited to cleaning and or replacement of
the stainless steel filter elements and checking the operation of the condensate
pump. The cooling unit, control elements and the condensate pump are protected by
a compact indoor rated enclosure. The condensate pump operates periodically and
drains the collected condensate.
The maximum sample gas flow is 250 litres per hour with a pressure drop of 5-10
mbar, depending on gas consumption.
Summary of Contents for Pury 250e
Page 1: ...Users Manual Pury 250e Gas Purification System ...
Page 6: ...Introduction Manual Pury 250e 6 Manual Pury 250e 2006 06 08 ...
Page 8: ...Installation Manual Pury 250e 8 Manual Pury 250e 2006 06 08 ...
Page 14: ...Commissioning Manual Pury 250e 14 Manual Pury 250e 2006 06 08 ...
Page 18: ...Maintenance Manual Pury 250e 18 Manual Pury 250e 2006 06 08 ...
Page 22: ...Circuit Diagrams Manual Pury 250e 22 Manual Pury 250e 2006 06 08 ...