Moisture Measurement in Heating Power Stations and Incinerators

Moisture Measurement in Heating Power Stations and Incinerators

The Task
Flue gas
Waste gas from incinerators and heating power stations may contain not only dust but also under certain circumstances, highly aggressive media such as hydrofluoric acid, nitro hydrochloric acid, sulfuric acid or other acids. Very high requirements are imposed on any measurement system used to take Humidity Measurements in such extreme ambient conditions.

Burst pipes
Cracked pipes and sometimes burst pipes occur from time to time in boiler systems. They begin with hairline cracks in a pipe, which quickly develop by chain reaction into serious damage. Therefore it is important, to detect these hairline cracks as soon as possible in order to prevent greater disasters or costly boiler shutdowns.

Quality assurance
Humidity Measurement plays a very big role in the optimization of various processes since it helps generally to save energy, material and to get a constant quality of product.

The solution
HYGROPHIL  is a process hygrometer designed to meet the highest industrial demands in respect of corrosion resistance, continuous duty and protection from contamination. Permanent self-cleaning means that the instrument is very well suited to cope with measurement air contaminated with acids, oils, dusts, solvents and other aggressive substances and that it displays a convincing level of precision. It is used in the partly uncleaned raw gas flows of power stations, refuse incinerators and large-scale furnaces mainly for the following purposes:

  • measurement of humidity
  • detection of burst pipes
  • optimization of desulfurizing processes
  • optimization of electric filters

Summary
HYGROPHIL H works by the principle of psychrometric gas humidity measurement, which is notable for its high accuracy and good reproducibility. All further variables can be calculated from the temperature differential of the wet and dry temperature sensor. This corresponds to the secondary standard method according to DIN 50012 and requires no calibration. A dosed jet of measurement gas flows past the dry sensor and strikes the wet sensor embedded in a water cylinder. The wet sensor is supplied continually with tenside-charged fresh water. This and the impact pressure of the gas means that the dirty surface is continually renewed, thus ruling all cross effects during measurement.

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