Abstract:
The present invention relates to a burner assembly for being attached to the outer wall (22) of the casing of a boiler, particularly a marine boiler for heating the boiler by injecting fuel and combustion air into a combustion chamber of the boiler through an inlet aperture (24) in the casing. The burner assembly comprises a burner housing (21) with a tubular portion (27) with a first axis A2 and a combustion air propelling chamber (28) communicating with the tubular portion through a propelling chamber outlet portion (30) having a second axis A3 such that the combustion air is ejected from the outlet portion of the propelling chamber into the tubular portion in a direction generally parallel to the second axis. According to the invention the angle between the first and second axes is between approx. 50 and 90 degrees and most preferably between 50 and 60 degrees. By the burner assembly according to the invention the torque and vibrational forces exerted by the burner assembly on attachment means (25) of the assembly to the boiler wall are considerably reduced.
Abstract:
For supporting the tubes (1) in a tube heat exchanger there is provided a modular tube sheet segment adapted to fit around one tube and provided with support surfaces for engagement with similar support surfaces of adjacent segments. The outer dimensions and shape of the segment are adapted to precisely provide the desired axis spacing and the desired tube arrangement upon mutual engagement among uniformly shaped segments. Together the segments provide a sheet (12) which meets all the functional requirements of a tube support sheet. The invention further provides a heat exchanger comprising a tube bundle which is put together by arranging tubes with attached segments individually or in layers, and it provides a method of manufacturing a tube bundle which may form part of a heat exchanger.
Abstract:
A fluid-bed heat exchanger (36) constitutes a component of a fluid-bed combustion reactor system (10) for establishing heat transfer from heated particulate material fluidized within the fluid-bed heat exchanger (36) to heat transfer means (62) contained within said fluid-bed heat exchanger. The heat transfer means are internally carrying a heat-transfer medium. The fluid-bed heat exchanger comprises gas inlet means (86) for the introduction of a non-aggressive, substantially oxygen-free gas for the fluidization of said particulate material by means of the non-aggressive, substantially oxygen-free gas for preventing the formation of deposits on the heat transfer means and for preventing the corrosion of the heat transfer means.
Abstract:
A heating system and a method for heating a boiler comprising a combustion chambre (13) having an axis of symmetry (X), one or more chamber inlets (12, 12’) for introducing combustion air and fuel into the combustion chamber, heat exchanger means, pressurizing means (22) for pressurizing the combustion air, first fuel inlet means (33) and first burning means (31) for burning a first portion of the fuel in the combustion air for heating the combustion air and arranged at a first location upstream of the chamber inlets, second fuel inlet means (41) for introducing a second portion of the fuel in the flow and arranged at a second location downstream of the first location and upstream of the chamber inlets, the chamber inlets being arranged such that the flow of combustion air with the second portion of fuel flows along a generally helical path around the axis (X).
Abstract:
The invention relates to an energy saving device and a method for energy saving in waste heat recovery systems for combustion engines during engine standstill or idling comprising exhaust gas boilers and oil fired boilers combined in a forced flow combination steam generation system.
Abstract:
A boiler comprising a furnace chamber, a passage extending through an aperture 9 in a bottom wall of the chamber and defined by an exterior truncated cone 18 tapering towards a boundary interface 19 with an interior truncated cone 17 also tapering towards the interface, the exterior and interior truncated cones having a substantially common axis, a burner lance 21 extending along the axis through the passage, a burner nozzle 23 mounted at the interior end of said lance, and a substantially circular flame stabilizing disc 24 mounted on the interior end of the lance coaxially with the truncated cones and interiorly of the nozzle and having a central aperture 34 in register with the nozzle for allowing combustion fuel from the nozzle to enter the chamber, the lance being arranged axially displaceable between a first , innermost, position and a second, outermost, position such that the stabilizing disc is located at a distance B from the boundary 19 in a position between the largest and the smallest diameter of the interior truncated cone when the lance is displaced axially to an intermediate position between the innermost position and the outermost position.
Abstract:
A heat exchanger for exchanging heat between a first and a second medium comprising a casing having a compartment enclosing a plurality of substantially parallel tubes (24) and an inlet and an outlet arranged such that the first medium is constrained to flow from inlet to outlet in a flow direction (R) substantially parallel to the tubes, a plurality of elongate surface enlarging elements (28) for the improved exchange of heat each having a first end attached to one of the tubes and extending obliquely and generally transverse relative to the flow direction to a second unattached end, the second unattached end being located upstream of said first end relative to the flow direction, the heat exchanger further comprising at least one perforated sound suppressing plate (52) mounted between the tubes such that the compartment is subdivided into two or more sub-compartments.
Abstract:
A heat exchanger for heat exchange between a first and a second fluid and comprising a cylindrical casing (2), a cylindrical fluid conduit (5) arranged inside the casing such that an axially extending tubular space (8) is defined, at least one helical coil (9, 10) of a finned or corrugated tube being arranged inside the tubular space, and adjustable throttle means (17, 17a, 18) adapted and arranged for adjustably throttling flow of the first fluid through the conduit (5) to adjust the flow of the first fluid through the conduit and the first tubular space for adjusting the heat exchange between the first fluid and the second fluid flowing through the helical coils (9, 10).
Abstract:
A heat exchanger unit (13) for recovering heat from the flue gases from a cylinder steam boiler (10), said heat exchanger unit comprising a flue-gas tube (14) and a heat-exchanging tube (16) which is supported concentrically inside the flue-gas tube (14) by a bent inlet pipe (19) extending from a lower opening (20) in the peripheral wall of the flue-gas tube (14) to an inlet opening (21) in a lower outwardly bulging end wall (22) of the heat-exchanging tube (16), and an outlet pipe (23) extending from an outlet opening (24) in an upper part of the peripheral wall of the heat-exchanging tube (16) to an upper opening (25) in the peripheral wall of the flue-gas tube (14). The inlet pipe (19) has a first, horizontal, straight end portion (19A), a second, upwardly directed, straight end portion (19B) and also an intermediate, curved portion (19C). The bending angle ( alpha ) of the curved portion exceeds 90 DEG and the other end portion (19B) extends with an inclination determined by said bending angle ( alpha ), towards the centre of curvature of a partially spherical portion of the lower end wall (22) of the heat-exchanging tube (16), in which wall the inlet opening (21) is arranged eccentrically in relation to the central longitudinal axis of the heat-exchanging tube (16).