Abstract: The invention relates to a method for decreasing emissions of nitrogen oxides and sulfur oxides when burning fuel which contains nitrogen and sulfur. According to the invention this is carried out by feeding fuel (4) and oxygen-containing gas (5) into a combustion reactor (1) the temperature of which is preferably 900.degree.-1500.degree. C., and that the combustion gases formed are directed into a suspension reactor (2) the temperature of which is preferably 750-1050.degree. C. and into which a pulverous material which binds sulfur oxides is fed so that the suspension density is 1-200 kg/m.sup.3, the oxygen concentration in the combustion reactor (1) and the suspension reactor (2) being controlled so that their total air coefficient is about 0.

Abstract: The invention relates to a device for cutting off and guiding an edge strip from one part of a paper or board machine to another in connection with the threading of a paper or board web. The device includes air jet nozzles for guiding the edge strip, and a threading plate which is provided with a cutting mechanism for cutting off the edge strip. In order to provide a device reliable in operation, the cutting mechanism including at least one blade member which is arranged to be displaced during the cutting of the edge strip in a plane substantially parallel to the plane of the threading plate from the front side of the threading plate towards the front edge thereof and to cut off the edge strip on the side facing away from the front edge of the threading plate and to guide the edge strip further on to the threading plate.

Abstract: A process for cooking and bleaching pulp in a closed system, wherein spent liquors from the cooking and the bleaching are recovered and their chemicals are regenerated and recycled as cooking and bleaching chemicals.

Abstract: The invention relates to a process and apparatus for causing the sulfur dioxide of flue gases to react to form solid sulfates and sulfites which can be separated from the flue gases. Sulfur dioxide containing flue gases (16) are directed according to the invention into one end of an oblong reaction zone (4), in addition to which pulverous calcium compounds and water are directed separately into the reaction zone at several points, and finally from the opposite end a flue gas suspension is withdrawn and directed to dust separation (5). By feeding the pulverous reagent and the water separately into the reactor 4, the problems involved in the preparing, handling and spraying of an aqueous slurry are avoided, in addition to which the retention time and the reaction conditions can be regulated easily in the oblong reactor 4.

Abstract: An arrangement for sealing a chamber containing pressure medium against a movable band. The band is arranged to form one side of the chamber. The arrangement comprises a sealing framework which is fastened to a body part of the chamber by means of a resilient membrane. The sealing framework is further provided with a sealing means for providing a sealing effect between the movable band and the rest of the chamber. The sealing means is thereby arranged to be pressed against the band by the pressure effect of a load medium fed on one side of the resilient membrane. In order to obtain an effective and adaptable sealing effect, the means for providing the sealing effect is formed by at least two sealing elements arranged in parallel and between which a sealing liquid is provided.

Abstract: A device for storing wire in a wire bolting arrangement, which device comprises a reel which supports a ring-shaped wire coil, and a supporter on which the reel is mounted for rotation. In order to prevent unintentional unwinding of the coil, and in order to simplify the replacement of the device, the reel is formed as an essentially closed housing which encloses the wire coil and which is provided with a central opening for drawing out a wire. The housing and the supporter are preferably formed as a separate, replaceable cassette fastened on the carrier of the bolting means.

Abstract: The invention relates to a press roll arranged to interact with a second roll in the wet end of a paper or paper board machine for forming a nip between the rolls. In the press roll a surface is arranged to be pressed against the second roll and is made of an elastic material for extending the nip. In order to provide a simple and versatile structure, the surface made of an elastic material is formed by a separate shell portion which surrounds a body of the press roll and is positioned over its entire length at a distance from the body. The shell portion is supported to be stationary with respect to the body by means of end flanges provided in the ends of the body, so that the shell portion is able to yield over the entire length thereof radially inwards towards the body locally at the nip point.

Abstract: The invention relates to a device for displacing a reeling drum of a web-like material from a store on a primary fork of the reeler of a paper machine or the like. The device comprises a displacing arm mechanism mounted pivotably around a stationary horizontal shaft and arranged to grip an empty reeling drum positioned in the store in an upper position and to deliver the reeling drum in a lower position on the primary fork. In order to provide a simple device reliable in operation and easy to automate, the displacing mechanism comprises a lever and a hook. The hook is journalled displaceably on a journal point provided in the lever so as to be displaced during the pivoting movement of the displacing mechanism.

Abstract: Continuously revolving percussion drilling machine, which comprises a body (1), a drill shank (2) mounted rotatably and axially slidably in the body for causing impacts on the drill rod, an impact mechanism (3) positioned in the body for causing axial impacts on the drill shank, and a rotating device (4) for rotating the drill shank around its axis. The drill shank is provided with a toothing (8), which is coupled in direct engagement with a toothing (9) revolving in relation to the drill shank and rotating the drill shank, said toothing of the drill shank being axially displaceable in relation to said rotating toothing, so that the contact surfaces of the teeth of the toothing on the drill shank and of the toothing rotating the drill shank revolve and are exchanged constantly. The teeth operate cold and well lubricated. The rotating toothing may be a cogwheel or a tooth rim.

Abstract: The invention relates to a method of cleaning the heat transmission surfaces of a steam boiler or the like. In the method the deposits which are formed on the heat transmission sufaces of the superheater of the boiler and the other heat transmission surfaces thereof during the operation and which hamper the heat transmission are removed by directing a cleaning jet of medium to said surfaces through sweepers. In order to provide a reliable, simple and energy saving cleaning method, the flue gases of the boiler are used as a medium. The flue gases can be taken from a gas flue positioned after an electric filter.

Abstract: The invention relates to an apparatus for handling sheets or the like. The apparatus comprises a bridge structure displacable on rails, an upper carriage displaceable on the bridge structure in a direction perpendicular to the rails, vertical beams attached to the upper carriage, and a carriage displaceable on the vertical beams in the direction thereof. The carriage is provided with lifting forks for removing a sheet pack or the like from a shelf place. The carriage is further provided with a gripper frame for picking up a sheet or the like from the shelf place or the like. In order to provide a simple and reliable apparatus, the carriage is provided with arms pivotable around a horizontal axis from a first position above the lifting forks and essentially in parallel therewith to a second position, and vice versa.

Abstract: A method of feeding concrete into a drill hole in the concrete bolting of a rock, in which method a feeding hose is pushed into the hole and concrete is pumped into the hole through the feeding hose at the same time as the hose is drawn outwards within the hole. In order to ensure that the hole is filled properly, the amount of concrete pumped into the feeding hose for the distance the feeding hose is withdrawn, is greater than the concrete amount theoretically sufficient for filling an unbroken hole with concrete when the hose is withdrawn that distance. A device designed for the realization of the method comprises a primary pump which pumps concrete into a piston-type metering pump which in turn pumps the metered amount of concrete into the feeding hose in proportion as the feeding hose is withdrawn.

Abstract: A device for transport of a cannon or such like with a vehicle, which cannon (2) comprises a gun barrel (3) and a carriage (4) supporting the barrel. The gun carriage is of an interchangeable platform construction, so that the cannon can be transported with a truck vehicle (1) equipped with a platform changing mechanism and lowered to the ground for firing with the help of the platform changing mechanism. The carriage has a bearing rail system (6) compatible with the platform changing mechanism of the truck vehicle, whereas the rails (7) of the bearing rail system are placed either on the lower part of the carriage (4) or on the supporting arms of the carriage.

Abstract: A method of and a device for guiding a wire in the wire bolting of a rock, wherein the wire is passed by means of a feeding mechanism from a wire magazine into a guide head supported by a feeding beam of the drilling equipment therethrough into a hole drilled in the rock. In order to protect the feeding mechanism against damage and dirt and in order to lighten the feeding beam, the wire is pushed into the guide head through a flexible guide pipe in such a manner that the feeding mechanism can be mounted on a carrier.

Abstract: A method for carrying out wire bolting for bolting a rock, in which method drill holes are drilled in the rock through an ore body, and a wire is pushed into the holes. In order that the wires would not hamper the emptying of the ore body, the wire is weakened before it is passed into the hole at least at one point in such a manner that the wire breaks at the weakened point when the ore is blasted.

Abstract: An opening device for drill rods for an extension rod drilling equipment, which device comprises a drilling machine (2) displaceable along a feeding beam (1), a stationary drill rod retaining centralizer (3) positioned on the drilling axis (A) for the drill rod, and a drill rod gripping centralizer (4) positioned between the retaining centralizer and the drilling machine. In order to speed up the disconnection of the drill rods, and in order to simplify the structure, the retaining centralizer is provided with a rotating mechanism (15) for the rotation thereof and the gripping centralizer is connected to an actuating device (22) for the displacement thereof in the direction of a drilling axis (A).

Abstract: An opening device for an extension rod drilling equipment, comprising a supporting sleeve (3) rotatably mounted in a frame (1), and gripping jaws (6) displaceably mounted in the sleeve for gripping a drill rod. In order to allow the device to both grip the drill rod and rotate it, the supporting sleeve is connected to a rotating mechanism (14) and provided with cylindrical guideways (4, 5) positioned eccentrically with respect to the axis (A) of the sleeve in such a manner that a rotating movement of the sleeve with respect to the gripping jaws causes a displacement of the gripping jaws towards an aligned rod releasing position and away from the aligned position respectively, depending on the direction of rotation of the supporting sleeve.

Abstract: An extended nip press for a paper machine for removing water from a wet paper, cardboard or similar fibrous or porous web. The press comprises a rotating press roll and at least one loading shoe, which is pressed against the press roll so as to form an extended press zone. The loading shoe may pivot around an axis parallel to the axis of the press roll. The web to be dewatered is passed through the pressing zone together with at least one felt that receives water. The loading shoe is supported onto the support frame by the intermediate of a support means. The center of gravity of the support force applied by the support means to the shoe is displaceable in the direction of running of the web to be dewatered for the purpose of adjustment of the pressure pattern produced in the press zone when different paper qualities are run.

Abstract: In a method of and device for adjusting the feed movement of a drill rod for drilling a rock, the drill rod is rotated by a pressure-medium-operated rotary motor and fed in a drilling direction and in the opposite direction by a pressure-medium-operated feed motor. A pressure change on the pressure side of the rotary motor due to a change in the rotation resistance on the rotary motor acts oppositely on the pressure and outlet sides of the feed motor toward reversing the feed force of the feed motor, i.e. in inverse and direct dependence on the pressure change, respectively. The pressures on the pressure side and the outlet side of the feed motor are, therefore, controlled so that, when the pressure on one side increases because of the pressure change, the pressure on the other side decreases and vice versa.

Abstract: A method for carrying out wire bolting of a rock, in which method a hole is drilled in a rock, and a wire piece shorter than the hole is pushed into the hole. In order to simplify the insertion, the wire piece is pushed into the hole by the same wire from which the wire piece has been cut. A wire bolting device developed for effecting the method comprises a cutting device mounted on the carrier of the device between a wire feeding mechanism and a resilient guide pipe attached to a head guide. A mounting space is provided beside the cutting device for the mounting of a pushing support between the ends of the cut wire.