Gas production

Digestion tower

The gas that arises in the digestion tower is stored in gasometers and used to cover the energy needs of the sewage plant itself, or fed into a gas distribution system. Level measurement in the digestion tower is a prerequisite for optimal operation of the entire system. To prevent foam from getting into the gas plant, especially when foam generation is intense, a reliable level detection system able to detect widely different foam consistencies is required.

Level measurement with VEGAPULS 68

Due to the methane gas created in the digestion process, a measuring principle is required that operates without being influenced by changing gas concentrations and fluctuating pressure. The non-contact VEGAPULS 68 radar sensor is the ideal solution for this measuring task because it detects the surface of the medium reliably without influence from sludge density and other process conditions.

Level detection with VEGACAP 64 ensures reliable max. signal

Since heavy buildup on instrumentation in the digestion tower is usually expected, the electrode of VEGACAP 64, which is completely immune to buildup, is well suited for this measuring task. Even centimetre thick encrustations and buildup on the sensor don't impair the function of this measuring system.

» VEGAPULS 68

Measuring range	up to 75 m

Process fitting	G1½A or flange

Process temperature	-200 … +450 °C

Process pressure	-1 … +160 bar (-100 … +16000 kPa)

Measurement accuracy	+/- 2 mm

SIL qualification	up to SIL2

» VEGACAP 64

Version	with fully insulated rod

Process fitting	from G¾A

Process temperature	-50 … +200 °C

Process pressure	-1 … +64 bar (-100 … +6400 kPa)