Abstract: The method and system is for the acid gas delignification of cellulose pulp in a gas/fluid suspension. The oxygen gas delignification takes place in a reactor system with one or several oxygen gas reactors. Delignification chemicals are added at least before the first oxygen gas reactor such that oxygen gas remains present during the complete reaction process in the reactors. Alkali in an amount that ensures that the pH lies above 9 is also added. The temperature of the cellulose pulp is measured at two different positions (T1, T2, . . . , Tn) viewed in the direction of flow of the pulp though the system. The measurements are used to control the charged amount of the delignification chemicals to the oxygen gas delignification. The first temperature measurement (T1) is carried out at a position in association with the first addition of oxygen gas.

Abstract: A computer based method for controlling an industrial process that includes at least two unit processes, including the steps of directly controlling the process by a control model including one or more algorithms, and automatic diagnosis of the validity of the process data retrieved from the process for the purpose of preventing irrelevant process data from being used as an input in the control model.

Abstract: In the present invention a refiner (108) of a mechanical pulping line is supplied with a controllable acoustic source (14), arranged for emitting acoustic signals into the pulp fluid. The controllable acoustic signal is allowed to interact with the fibres in the pulp, and the acoustic (pressure) signals resulting from such an interaction is measured. At least one spectral component is measured. The measured spectral component is used to predict properties, content and/or size of the fibres. These properties may then be used to control the refiner (108) process. The used acoustic signal has preferably a wavelength that is large compared with a typical site of the particles.

Abstract: A method and device for monitoring and controlling a pharmaceutical, chemical or food process, in which the biological activity and/or the bio-mass of micro-organisms in the process is monitored, and in which the state of the process is detected by monitoring viscosity and/or aggregate size and/or content of a dispersion of proteins, crystalline particles or fat droplets that are processed, respectively. The micro-organisms and/or bio-molecules produced in the process, and the proteins, crystals particles or fat droplets being processed are monitored by means of acoustic spectroscopy.

Abstract: A method and device for monitoring and controlling a pharmaceutical, chemical or food process, in which the biological activity and/or the bio-mass of micro-organisms in the process is monitored, and in which the state of the process is detected by monitoring viscosity and/or aggregate size and/or content of a dispersion of proteins, crystalline particles or fat droplets that are processed, respectively. The micro-organisms and/or bio-molecules produced in the process, and the proteins, crystals particles or fat droplets being processed are monitored by means of acoustic spectroscopy.

Abstract: A method and device for monitoring and controlling a pharmaceutical, chemical or food process, in which the bio-logical activity and/or the bio-mass of micro-organisms in the process is monitored, and in which the state of the process is detected by monitoring viscosity and/or aggregate size and/or content of a dispersion of proteins, crystalline particles or fat droplets that are processed, respectively. The micro-organisms and/or bio-molecules produced in the process, and the proteins, crystals particles or fat droplets being processed are monitored by means of acoustic spectroscopy.

Abstract: A method and device for monitoring and controlling a pharmaceutical, chemical or food process, in which the biological activity and/or the bio-mass of micro-organisms in the process is monitored, and in which the state of the process is detected by monitoring viscosity and/or aggregate size and/or content of a dispersion of proteins, crystalline particles or fat droplets that are processed, respectively. The micro-organisms and/or bio-molecules produced in the process, and the proteins, crystals particles or fat droplets being processed are monitored by means of acoustic spectroscopy.

Abstract: A method in consolidation and drying of paper. A wet web is contacted with superheated steam, whose temperature is 200-600° C. for the purpose of reducing, by heat transfer from the superheated stream, the water content of the web by evaporation of a substantial part of the water in the same. The wet web is supported and transported by means of a heat-conductive, gas-impermeable belt whose width is equal to or exceeds the width of the web, and jets of the superheated steam are directed towards the side of the web facing away from the belt.

Abstract: A gas distribution member (3; 20) for a polymer membrane fuel cell comprising a highly porous, sintered material. The sintered material comprises fibers of an inorganic material. The fibers have a diameter in the range 0.5-50 &mgr;, preferably 2-25, most preferred 8-22 &mgr;, and a length in the range up to 3 mm, and the porosity is in the range of more than 50% by volume, preferably more than 90 percent by volume. Disclosed is also a fuel cell comprising said gas distribution member, and a method of making the same.

Abstract: In the prevent invention a controllable acoustic source (14) in connection with the process fluid (10) emits a signal (18) into the fluid (10), consisting of a suspension of particles (12), being volumes of gas, liquid or solid phase. The controllable acoustic signal (18) is allowed to interact with the particles (12), and the acoustic (pressure) signals (22) resulting from such an interaction is measured preferably via a sensor (24). A spectrum is measured. The spectrum is used to predict properties, content and/or size of the particles (12) and/or used to control a process in which the process fluid (10) participates. The prediction is performed in the view of the control of the acoustic source (14). The used acoustic signal has preferably a frequency below 20 kHz.

Abstract: A method and a device for controlling a process (10), having at least two sub-processes (20, 30), by tracking, processing and correcting variables for the product, the production means and/or any process media throughout the process line. The process flow for the first sub-process (20) is divided into slices, each slice representing a specific volume of process flow. At least some of the measured and sampled variable values are related to its specific slice volume.

Abstract: A shaped sintered fibrous porous body exhibits a structure with a three-dimensional corrugated or undulating shape and porosity.

Abstract: Method for drying wood raw material (10) by means of hot gases (20) supplied to the drying process, in which VOC, apart from water, evaporate from the wood raw material into the gases. The drying process is divided and carried out in at least two sub-steps (I, II), from which process gas (22, 33) is removed separately, and the drying process is thus controlled that VOC evaporate during one of the sub-steps, and the VOC are concentrated to this sub-step. The temperature of the gas containing VOC is increased to a temperature exceeding 180° C. before VOC are oxidized catalytically at said elevated temperature, in order to reduce the discharge of VOC from the drying process.

Abstract: The device relates to a wood drying plant comprising a wood drying device and a purifying device which is arranged to receive a drying gas from the wood drying device, the drying gas comprising water steam and volatilized organic components such as terpenes, and to purify the drying gas from organic components and to recover the latter. The purifying device comprises at least one condenser which is arranged to separate relatively difficultly volatilized components containing organic components and relatively easily volatilized components. The purifying device also comprises a separating device which is arranged to separate said organic components and a rest material from the relatively difficultly volatilized components. The purifying device also comprises a transferring device which is arranged to transfer organic components present in the rest material to the drying gas introduced in the purifying device.