Valimaki E.J.,Valmet Power Oy |
Siren K.B.,Oy Sirra Ab
J-FOR | Year: 2013
A new process concept for removal of potassium, chlorine, and sulphur and simultaneous recovery of sodium has been developed. The concept consists of simplified stripping of hydrogen sulphide from green liquor (GLSS), purging of sulphur in elemental form by a liquid redox process, and crystallization of ESP dust together with stripped green liquor. The process enables simultaneous removal of the elements investigated, with smaller sodium losses than in earlier ESP dust-based processes. The element balances can be controlled independently of each other. The process has been tested in a pilot plant.
Mantyniemi J.,Valmet Power Oy
Biofuture for Mankind Conference | Year: 2014
Today there is a high demand for new technologies for converting renewable resources into sustainable results. The pulp and paper industry, along with many other utilities, have the benefit of having access to renewable raw material. Therefore they have a long history of processing biomass to sustainable products like bio-energy and pulp and paper products. This forms a good platform for developing and applying technologies to produce new, high value products. In this paper, two demonstrated bio-refinery processes, LignoBoost and Integrated Pyrolysis, are discussed.
Valmet Technologies Oy, Valmet Power Oy and Metso Power Oy | Date: 2009-08-18
Valmet Power Oy and Teknologian Tutkimuskeskus Vtt | Date: 2013-07-05
The invention relates to a method and apparatus for producing a pyrolysis product, in which raw material are fed to the pyrolysis reactor and gaseous pyrolysis product fractions and by-product fractions are formed from raw material by pyrolysis in a pyrolysis reactor. According to the invention the method comprising steps: combusting at least one by-product fraction from the pyrolysis reactor in at least two combustors, and recovering energy formed in the combustor.
Valmet Power Oy | Date: 2014-11-26
A method for measuring, from a thermal device, temperature, molecular number density, and/or pressure of a gaseous compound as function of distance, the gaseous compound absorbing at least some light. The method comprises generating, for a first wavelength band and a second wavelength band, a pulse sequence comprising a light pulse or light pulses, guiding the pulse sequence into the thermal device, and measuring, as function of time, the intensity of the scattered light at the first wavelength band and at the second wavelength band. The method further comprises determining information indicative of the differential absorption between the two wavelengths bands using measured intensities and determining the temperature, the molecular number density, and/or the pressure of the gaseous compound using the information indicative of the differential absorption between the two wavelengths bands. A thermal system arranged to carry out the method.