초록 ▼

An integrated power plant comprises a gas-turbine set with a compressor, a combustion chamber and a gas turbine, a heat-recover boiler arranged downstream of the gas turbine, and a water/steam circuit with a steam turbine, a condenser, a feedwater tank and a separately fired steam generator having a

An integrated power plant comprises a gas-turbine set with a compressor, a combustion chamber and a gas turbine, a heat-recover boiler arranged downstream of the gas turbine, and a water/steam circuit with a steam turbine, a condenser, a feedwater tank and a separately fired steam generator having a flue-gas NOx-reduction unit arranged on the flue-gas side downstream of the steam generator, the heat-recovery boiler for the generation of steam being incorporated in the water/steam circuit. In such a power plant, in order to improve the part-load behavior, a branch line is provided at the heat-recovery boiler, by means of which branch line a predetermined portion of the exhaust gases coming from the gas-turbine set and flowing through the heat-recovery boiler can be branched off and added upstream of the flue-gas NOx-reduction unit to the flue gases coming from the steam generator.

대표청구항 ▼

An integrated power plant comprises a gas-turbine set with a compressor, a combustion chamber and a gas turbine, a heat-recover boiler arranged downstream of the gas turbine, and a water/steam circuit with a steam turbine, a condenser, a feedwater tank and a separately fired steam generator having a

An integrated power plant comprises a gas-turbine set with a compressor, a combustion chamber and a gas turbine, a heat-recover boiler arranged downstream of the gas turbine, and a water/steam circuit with a steam turbine, a condenser, a feedwater tank and a separately fired steam generator having a flue-gas NOx-reduction unit arranged on the flue-gas side downstream of the steam generator, the heat-recovery boiler for the generation of steam being incorporated in the water/steam circuit. In such a power plant, in order to improve the part-load behavior, a branch line is provided at the heat-recovery boiler, by means of which branch line a predetermined portion of the exhaust gases coming from the gas-turbine set and flowing through the heat-recovery boiler can be branched off and added upstream of the flue-gas NOx-reduction unit to the flue gases coming from the steam generator. lar array of outer nozzles includes an air swirler for swirling air passing through the combustor, and wherein, during steps b), d), and e), premix fuel is supplied to the annular array of outer nozzles at locations upstream of said air swirlers and discharged from said outer nozzles downstream of said air swirlers. 3. The method of claim 2, wherein each of said outer nozzles in the annular array of outer nozzles has at least one premixed gas passage connected to at least one premix gas inlet and communicating with a plurality of radially extending premix fuel injectors disposed within a dedicated premix tube and wherein during steps (b), (d), and (e), premix fuel is supplied to said at least one premix gas passage and discharged through said plurality of radially extending premix fuel injectors, whereby premix fuel and combustion air is mixed in said dedicated premix tube prior to entry into a combustion zone disposed downstream of the premix tube. 4. The method of claim 1, wherein said outer fuel nozzles each include a central fuel passage and a water passage encircling said central fuel passage and further comprising the step of discharging water from said water passage into a combustion zone downstream of said outer fuel nozzles. having a pre-weakened fold line, thus forming an end tab which is inserted in the carton body and is at an angle to the rest of the lid; simultaneously distancing the lids from the carton body, by performing a rotation which is opposite to said folding rotation movement; simultaneously pressing the pair of end tabs and maintaining their position with respect to the lids; and simultaneously moving the lids towards the carton body, inserting the tabs in the openings in the carton body to close the carton. 5. The method according to claim 1, wherein the step of folding the first pair of smaller flaps envisages a first folding rotation, simultaneous and by contrast, of one flap in each pair, located on one side of the carton body, and a second folding rotation, again by contrast and simultaneous with said translation, of the other flap in each pair, located on the opposite side of the carton body. 6. A device for packaging ordered groups of filter bags containing doses of products for infusion comprising at least a station for forming a group of a preset number of filter bags arranged in a row, the device comprising: means for forming an individual tubular carton body which is fed in the form of a flat pre-folded blank from a magazine and onto a loading table in such a way as to obtain the carton body with two opposite openings, one on either side, to which two pairs of flaps and a pair of lids are attached, the carton body being in an open configuration to allow insertion of at least one row of products, one of the openings of the carton body being positioned opposite the end of a passage for the row of products, to allow the row of products to be fed into the carton body in a direction of feed perpendicular to the direction of carton feed; the passage presenting a pair of lateral walls adapted to be in contact with the flaps and being mobile by a rotation and translation movement between a lowered operating position, in which the passage is positioned on a lid of the carton and coplanar with the loading table and in which the lateral walls keep the flaps open, and a raised non-operating position, in which the passage is distanced from the lid; first means for folding the two pairs of smaller flaps, operating at the loading table and designed to allow the two pairs of smaller flaps to rotate in such a way as to obtain a first partial closure of the openings as the carton is fed in a preset direction; and second means for folding the lids, being located close to the carton body and downstream of the first folding means relative to the direction of feed, and being designed to allow at least a simultaneous closing rotation of the lids towards the carton body, the lids being attached to the carton body in such a way as to form a closed package. 7. The device according to claim 6, wherein the means for forming the carton body comprise a suction cup unit for picking up the flat pre-folded blank from a stack of blanks, and a rigid rod used to erect the individual blank on the loading table. 8. The device according to claim 7, wherein the suction cup unit comprises a support arm which is free at least at one end, at least one pair of suction cups for picking up the blank from the stack, the arm being controlled by a four-bar linkage allowing the arm to move in both directions between a pickup end position, in which the pair of suction cups makes contact with a blank on the stack, and a release position, in which the pair of suction cups is below the loading table, releasing the blank onto the table. 9. The device according to claim 7, wherein the rigid rod has a shaped extension forming a guide close to the loading table, is designed to intercept the flat pre-folded blank during its downfeed from the magazine, and allows part of the surface of the carton body to be rotated upwards. 10. The device according to claim 6, wherein the first folding means comprises two pairs of fixed and mobile contact elements positioned on either side of the carton body resting on the loading table, wherein a first, mobile pair of the contact elements is attached to and projects from either side of a surface which makes contact with one end of the carton body, allowing folding of the two smaller flaps attached to one end of the carton body, as the surface moves in the direction of feed, by relative means which are synchronized with the machine, and wherein the other pair of contact elements forms a fixed portal for the passage of the carton body, allowing folding of the remaining two smaller flaps towards the openings in the carton body as the carton body moves towards the second folding means. 11. The device according to claim 6, wherein the second folding means comprises at least one pair of second levers which simultaneously push the lids from a substantially horizontal position to a substantially vertical position in which they are in contact with the carton body to close the openings. 12. The device according to claim 6, wherein the second folding means comprises parts for simultaneously folding and picking up the ends of the lids and is located on opposite sides of the carton body to form relative end tabs which are angled towards the carton body. 13. The device according to claim 6, wherein the second folding means comprises presser parts positioned above the carton body and acting on end tabs of the lids when in a vertical configuration to angle the end tabs towards the carton body along a pre-weakened fold line on each of the lids to close the openings. 14. The device according to claim 6, wherein the second folding means comprises: a pair of second levers on opposite sides of a carton transit table, the levers being an extension of the loading table and being designed to allow the lids to be simultaneously pushed from a substantially horizontal position to a substantially vertical position in which they are in contact with the carton body and close the openings; parts for simultaneously folding and picking up the free ends of the lids with a pre-weakened fold line to form end tabs, the parts being mobile between a first, operating position, in which the parts are close to the carton body and simultaneously intercept the ends of the lids, and a second position, in which the end tabs obtained are in a pre-insertion configuration and in which the parts are distanced from the carton body and simultaneously move the lids back away from the openings; and presser parts, above the carton body and acting on the end tabs of the lids, in the pre-insertion configuration, and being able to simultaneously angle the relative end tabs towards the corresponding openings in the carton body in which they are inserted by subsequent movements of the folding and pickup parts towards the carton body. 15. The device according to claim 14, wherein each of the second levers comprises: one end having a pusher head extending horizontally, parallel with the carton body, to push the associated lid; and an opposite end being attached to a toothed sector connected to a rotary support shaft and being substantially below the transit table wherein each toothed sector engages with the other to allow simultaneous movement of the second levers upon activation of a single first cam drive means connected to one of the second levers. 16. The device according to claim 14, wherein the presser parts comprise a support frame for a plurality of vertical pins that are parallel with one another in two rows such that they are on opposite sides of and above the carton body but do not interfere with the folding and pickup parts, and wherein the frame is connected to second cam means which moves the frame between a raised non-operating position, in which the pins are distanced from the end tabs, and a lowered operating position, in which the pins make contact with the end tabs. 17. The device according to claim 14, wherein the folding and pickup parts comprise a plurality of rods, arranged in tw