- Air and flue gas

The program is made for the planning of plants to the flue gas treatment, like desulphurization, denox etc. It supplies facts of gas mixtures which are based on air, as moist or dry air or e.g. flue gas and exhaust gases. Possible also the computation of operations at these gas mixtures such as a mixing, quenching, cooling/heating, and compressing and dehydratation. Therby gas facts in each position of the flue gas way in the projected or current plant are determined. In addition it supplies facts over freight of the gas components, water consumption for quenching, water- and acid dew point, as well as the physical characteristics for the gas mixture. It also makes possible the computation of drying processes.

The facts, which are supplied for each gas mixture are:

• Volume and proportions wet and dry.
• Mass flow and flow rate wet and dry
• Standard density wet and dry and the operating density
• Concentration of the pollutants in mg/Nm³ with arbitrary oxygen reference
• Freight of water, carbon dioxide and the pollutants
• Relative and absolute humidity, water dew point
• Acid dew point by 3 methods, SO₃ concentration and conversion rate
• Enthalpy, heat conductivity, viscosity and Cp-value of the gas mixture

The gas mixtures are based on air and are consistong of nitrogen, oxygen, carbon dioxide, water, sulfur dioxide and -trioxide, nitrogen oxides, hydrogen chloride, hydrogen fluoride and dust. The data input is very flexible. The composition can be entered in volume and mass per cent. For pollutants also in mg/Nm³ with and without oxygen reference. The humidity can also be modified later. A droplet carry over in saturated gases is considered.

The following operations at the gas mixtures are implemented in the program:

• Cooling and heating
• Add and renove dust
• Mixing with other gas mixtures
• Quenching
• Compressing
• Drying of solutions and suspensions
• Dehumidify

Operations can be accomplished according to different criteria. So the quenching can be computed in such a way that a given temperature adjusts itself, a desired relative humidity reached, or a well-known mass water evaporated. Similar flexible the cooling/heating and mixing will be accomplished.