摘要:
The invention relates to a radiant burner for boilers, consisting of a sheet metal support (1), with a gas feed line (3) leading to a gas inlet port (2) in the sheet metal support (1) and a curved burner surface (4) of wire cloth arranged at an opposite side of the sheet metal support. According to the invention, the burner surface (4) is of hemispherical shape and at least one similarly hemispherical gas distributor (5) of perforated sheet metal is arranged concentrically under the burner surface and is spaced therefrom at a distance (A) which is considerably smaller than the diameter (D) of the hemisphere of the burner surface (4) and is also affixed to the sheet metal support (1). The diameter (D.sub.1) of the gas inlet port (6) corresponds substantially to the diameter (D.sub.2) of the hemispherical gas distributor (5). Such a construction fulfills the requirements of a large gas inlet port, stability of the burner surface and good gas distribution over the burner surface.
摘要:
The fire box unit inserted into a water casing of a boiler includes a tubular cast iron body fluid-tightly mounted in the apertures of the end walls of the steel sheet casing. The cast iron body is shaped to converge frusto-conically from its inlet to its outlet end and has a plurality of radially inwardly extending webs. A combustion chamber shell is mounted in the inlet end of the cast iron body and has a fuel burner inlet for burning a fuel in the chamber defined by the shell. A closure wall opposite the fuel burner inlet deflects the combustion gases of the burnt fuel towards the fuel burner inlet where the deflected gases are received in a gas guide chamber. The shell with the gas guide chamber and a gas collecting chamber adjacent the closure wall at the outlet end of the cast iron body is supported on the webs and defines therewith gas flues leading from the gas guide to the gas collecting chamber. The gases in the flues heat the water in the casing and condensate tends to form in the bottom region of the tubular cast iron body protruding beyond the end walls of the casing. A shoulder damming the flow of the condensate in the gas flues in the end regions.
摘要:
A load transporting pallet made of paper, cardboard and/or cellulose fiber waste is disclosed. In order to improve the carrying capacity of such pallets, a supplementary reinforcement layer made of recyclable material is arranged between both layers that form the carrying surface and the mounting fee. The reinforcement layer is provided with passages distributed throughout its whole surface and through which the top and bottom layers are interconnected by their opposite rough surfaces.
摘要:
The invention is concerned with a heat-exchanger for arrangement behind the combustion chamber of a heating boiler. The heat-exchanger comprises water-carrying and gas-carrying interior chambers separated from one another by walls extending in parallel and being spirally coiled about a filling member and sealed against one another by bent edges. In order to so form a preferred form of embodiment of a heat-exchanger of this type so that the participating components, considering the coiling process, can be thinly dimensioned and nevertheless insure a pressure-stable final condition, thereby foregoing separate spacers actually not forming part of the heat-exchanger and thereby preventing or substantially preventing during coiling into a spiral the edges to be joined by welding from forming wave-type warpings and the wall faces from deforming, the heat-exchanger according to the invention is designed such that the wall which relative to the coil axis is the inner wall, at the top and at the bottom, includes externally bent edges having a width at most corresponding to the width of the water-carrying passage and the outer wall includes inwardly bent edges having a width corresponding, at most, to half the width (B), which edges overlap the edges of the inner wall or are in alignment therewith and are connected thereto in fluid-tight manner. Corrugated structures of both walls protruding into the gas-carrying passage open at the inlet and outlet sides, are arranged at a distance (D) from the edges in the walls extending substantially in parallel to the coil axis in a mutally supporting manner. The water-carrying passage is sealed at both ends of the spiral except for the forward and return connection openings.
摘要:
An atmospheric gas burner assembly comprises a burner tube defining a multiplicity of gas outlet ports and an element reducing the flame temperature and, hence, the emission of oxides of nitrogen disposed above the burner tube in the flame area. To optimize the reduction of NO.sub.x emission without affecting permitted CO values and to render the values of reduction in NO.sub.x emissions largely independent of the geometry of the surrounding combustion chamber so as to obtain reproducible emission reduction values, the reducing element is constituted by a multiplicity of fins confining the flames in shafts extending therebetween, the fins extending perpendicularly above the tube and being distributed along the tube.
摘要:
Connecting arrangement for a heating boiler, in whose water-bearing sheet-steel housing is arranged an installation casting consisting of a combustion chamber and fuel-gas ducts.For having a good and simple connection between the sheet-steel housing and the installation casting the improvement consists in that the front and rear wall of the sheet-steel housing are provided with an access opening and the opening edges are bent in the form of a collar, the inside diameter of the collar being rather smaller than the outside diameter of the seating faces of the installation casting and the front and rear wall being connected to the seating faces by a press fit.
摘要:
A connecting structure for shelves comprising horizontally-disposed distributing trays detachably affixed to vertical supporting members. The trays are provided with bent edges and with plastic elbows to cover the corner gaps of adjacent flank faces. The elbows have openings therein for screwing the trays to the supporting members.
摘要:
A boiler for the combustion of liquid or gaseous fuels comprises a water-carrying housing in which is provided a cylindrical chamber for receiving the combustion chamber and the fuel gas flues, with a reversion chamber coupled ahead thereof, and with the chamber being surrounded by a plurality of circumferentially distributed flue channels disposed in spaced and side-by-side relationship and in cross section formed by approximately U-shaped sheet metal profiles, which channels are in communication with a flue gas collecting chamber provided with a flue gas discharge and are connected by longitudinal welding seams to the inner wall of the cylindrical chamber.
摘要:
A fuel burning boiler comprises a water holding shell of sheet steel having front and rear walls defining axially aligned openings. An insert body passes through the openings and is affixed thereto, the water being held between the shell and insert body. The insert body includes a cast iron casing providing a combustion chamber in the interior thereof, defining ducts for combustion gases of the fuel burnt in the combustion chamber and a smoke box at the rear wall and in communication with the ducts for receiving the combustion gases therefrom, and a sheet steel casing forming a skin over the cast iron casing and tightly fitting thereover. The sheet steel casing is fluid tightly connected with the front and rear walls of the shell around the rims of the opening therein.