M&C TechGroup BA-P4 Operator's manual - Manual (Page 9)

9
Gas sampling and conditioning technology 10-1.1-ME
The inlet pressure is maximum 5.8bar and is limited by relief valve YD2 (works setting). The catalyst
F13 is arranged downstream of a pressure regulator YD1. Via a control knob on the front panel of the
combustion air conditioning unit, the outlet pressure can be regulated up to maximum 4bar by the
customer. Pressure gauges P1 and P2 on the front panel of the BA... enable visualisation and
monitoring of the inlet and outlet pressure.
In the event of a power failure or interruption of the gas flow (“Air/On” switch in bottom position),
solenoid valve Y1 is automatically opened and the pressure in the combustion air conditioning unit is
relieved.
If the inlet pressure drops to a value below 4bar, pressure switch S3 opens; the gas flow is interrupted
automatically, the pressure in the combustion air conditioning unit is relieved via solenoid valve Y1 and
the alarm is applied as a status signal to the nine-pole connector at the rear of the combustion air
conditioning unit.
Depending on the combustion air supply, distinction is made between the BA and BA-P4 versions.
BA-P4 version:

Ambient air is drawn in by suction via the ambient air suction filter Fl1 (filter fineness 0.1µ) located
at the rear by means of the integrated swing piston compressor M1.

The swing piston compressor M1 compresses the ambient air to about 5.8bar. If the pressure is
exceeded, relief valve YD2 is opened and the excess gas is passed into the suction pipe between
the ambient air filter and pump.

Compression of the ambient air causes the dew-point of the gas to increase. The condensate
occurring in the pipe (as a cooling section) is previously separated in a combined high-efficiency
particle-condensate filter YA1 (0.01µ filter fineness). The integrated automatic float-condensate
drain with G 1/8”i connection thread ensures automatic condensate removal. An appropriate hose
coupler must be provided by the customer.
BA version:

With the BA version, the swing piston compressor for transport and compression of the gas is
omitted. Oil-free compressed or instrument air can be connected directly to the rear panel 5 (G
1/4”i) of the combustion air conditioning unit. When doing this, it must be ensured that the available
inlet pressure is above 4bar. If a pressure of about 5.8bar is exceeded, the relief valve YD2 opens
(see above). Excess gas is passed with the waste gas of the diaphragm drier Fl2 to the waste air
outlet 2.

Before entering the diaphragm drier Fl2, the gas is passed through the high-efficiency particle-
condensate filter YA1 (see above), where any fine particles are separated.
In both versions, the downstream arranged diaphragm drier Fl2 dries the combustion air to a dew
point less than -10°C.
A partial flow of the dried combustion air is used as waste air for the diaphragm drier. The needle
valve YN1 regulates the volume flow depending on the inlet pressure between 20l/h and 60l/h (works
setting). Air discharge takes place via the waste air outlet 2 on the rear panel of the combustion air
conditioning unit; a hose DN 4/6 can be connected by the customer.
Hydrocarbon elimination takes place stepwise in two stages: