Abstract: There is provided a method for monitoring deposit build-up on spray nozzles in a spray drying or spray cooling chamber. The method comprises feeding drying air or cooling air into the chamber, and feeding a feed material to be spray dried or spray cooled into the chamber through one or more spray nozzles, thereby obtaining one or more sprays of feed material in contact with drying or cooling air. A digital reference image is obtained, which reference image has an image area comprising a first area of interest covering at least part of a spray nozzle and/or part of a feed material spray corresponding to a spray nozzle. A number of process images are obtained and recorded, where the process images cover the same image area as the reference image, and at least part of the recorded process images are compared with the reference image, and a difference, if any, is detected for the first interest area between the reference image and the process images being compared to the reference image.

Abstract: The invention relates to a gas distributor for, and a method of, controlling the velocity profile of a drying gas in a convective dryer, particularly the radial velocity profile, by creating an advantageous velocity profile prior to introducing the drying gas into the convective dryer chamber. The velocity profile may have different requirements depending on the convective process, chamber dimensions and atomizing means, but common gas distributor targets may be defined, such as a uniform velocity distribution and axial alignment. The invention further concerns a convective dryer comprising the gas distributor of the present invention, the use of said method to produce a powdery substance in a convective dryer according to the present invention.

Abstract: In the application a spray dryer absorption apparatus for treating a stream of flue gas containing acidic components is disclosed. The apparatus comprises a chamber having vertical cylindrical walls, said chamber comprises (i) an inlet for a flue gas stream containing an acidic component, (ii) an atomizer for spraying droplets of an absorbent slurry into said flue gas stream to effect a chemical reaction between the droplets and the acidic component of the flue gas, thereby forming a particulate reaction product, and (iii) an outlet for the treated flue gas and entrained particulate reaction product, wherein the bottom of the chamber having vertical cylindrical walls is substantially horizontal and impervious to gases. The apparatus of the invention has the advantage of a simplified geometry accounting for lower building and maintenance costs.

Abstract: A method for chilling a building includes the steps of: heating a working solution contained in a solar panel using solar radiation, separating the heated working solution in vapor and a concentrated working solution, condensing the vapor to liquid refrigerant, evaporating the liquid refrigerant, (i) in a building to be chilled or (ii) outside a building to be chilled, wherein the cooling obtained by evaporation is transferred to a cooling liquid outside the building and transported to the building to be chilled for delivery of the cooling, absorbing in an absorber the vapor in the concentrated working solution, and returning the working solution to the first step.

Abstract: Disclosed herein is a method for reducing the amount of coarser particles from a stream of flue gas prior to treatment by a spray dryer absorption process (SDA). The method comprises the steps of directing a stream of flue gas containing entrained particles of varying sizes through a curve, thereby subjecting the particles to a centrifugal effect, collecting the particles predominately of the coarser size at a particles collecting means provided in the outer circumference of the curve, dispersing the flue gas reduced in particles of coarse particle sizes into the chamber of a spray dryer absorption apparatus, wherein the particles content of the original flue gas stream is above 20 g/Nm3. Also an apparatus for performing the method and a gas disperser is disclosed. The method substantially reduces the cost of the entire plant for treating flue gas having a high content of entrained coarse particles by eliminating the need for a particle pre-collector upstream the SDA.

Abstract: Disclosed herein is a method for reducing the amount of coarser particles from a stream of flue gas prior to treatment by a spray dryer absorption process (SDA). The method comprises the steps of directing a stream of flue gas containing entrained particles of varying sizes through a curve, thereby subjecting the particles to a centrifugal effect, collecting the particles predominately of the coarser size at a particles collecting means provided in the outer circumference of the curve, dispersing the flue gas reduced in particles of coarse particle sizes into the chamber of a spray dryer absorption apparatus, wherein the particles content of the original flue gas stream is above 20 g/Nm3. Also an apparatus for performing the method and a gas disperser is disclosed. The method substantially reduces the cost of the entire plant for treating flue gas having a high content of entrained coarse particles by eliminating the need for a particle pre-collector upstream the SDA.