US1931003A - Water heater - Google Patents

Description

WATER HEATER Filed Dec. 932

2 Sheets-Sheet l NA THAN 11. KRAMAROFF B/ CHAYRDKKRAMA ROFF 1933- N. K. KRAMAROFF ET AL 1,931,003

WATER HEATER 2 Sheets-Sheet 2 Filed Dec.

W W W [VA THA/v K KRAMAROFF R/c/m Raff. KRAMARoFF [/VVENTOHS A TTORNEY Patented Oct. 17, 1933 1,931,603 WATER HEATER Nathan K. Kramaroff and Richard K. Kramaroff,

' Philadelphim' la.

, Application December 19, 1932 a Serial No. 647,858

: Clai1'ns. (01. 122-20) Our invention relates to hot water heaters and has particular reference 1 to heaters embodying heating coils or-similar containers supported inside of furnaces.

Ordinary furnaces for heating houses are usually provided with devices for heating water for household purposes. These devices are placed in the path of hot products of combustion absorbing some of their heat, causing clinkers, and in no way assisting in the process of combustion itself. The average efficiency of such hand vfired furnaces is usually rather low due to the irregular burning of the coal spread on the grate bars, there sponding loss of the furnace efficiency. A large proportion of the available heat is therefore wasted, although some of it is used for heating pipes or coils with water. Direct contact with hot gases is, however, injurious to such water heating devices, causing their oxidation, clogging with soot, and forming hard scale inside.

In order to obviate these difficulties, we provide a special housing for the water heating coil so that the coil is protected from direct action of the products of combustion, and, therefore, no clinkers can be formed. The housing itself weutilize as a means for improving the combustion and raising the furnace efficiency. For this purpose we make the housing in the shape of a cylinder closed on top where the'heating coil is located, and open at the bottom, being suspended at a certain distance above the grate bars. The sides of the cylinder below the coil are provided with numerousv apertures for air passing from the grate into the furnace.

The housing is placed in the middle of the grate so that a circular or tubular space is formed between its walls and the insidewalls of the furnace. Coal is piled in this space up to the top of o the cylinder and is burned in the draft of air passgrades of coal can be successfully burned with our device. The very'position of this device does away with the needlesswaste of coal. 7

Our invention is more fully described in the ac companying specification and drawings -,in

which s ,1 1

Fig. his a sectionalzelevation of our genera-, tor mounted in the furnace of a heating'boiler, Fig.

2 isan outside view of the device in a different furnace and'Fig.'3 is a section on the line 3-.-3

of Fig.1. 7

Our generator consistsof a coil 1 "with intake and'outletpipes 2 and 3 fitted in a cover block 4. The pipes are supported in the walls of aboiler 5 and extend-to the top and bottom-of 'ahot water tank 6. The latter is. shown mounted on legs 7 although itinay besupportedin any ordinary mannerforinstance, against the wall of a house. The block 4 has a flange 8 on which a.cor-' responding flange of a tubular housing. 9 rests. The housing has a lug 10 with a holewhich can be engaged-by. a hook 11 for turning the housing on its seat on the flange 8.; The housing is suspended on .the pipes 2 and 3. in the middle of the boiler 5. Y 1

The housing is open at the bottom and is 8 at a short distance above the grate bars 12. ,Its

walls are provided with longitudinal slots 13 terminating below the coil 1 so that a hot air pocket is formed around the coil in the upper portion of the housing- The slots have converging or tapering sides forming air nozzles for the draft of air flowing through the grate bars and from inside of thehousing into the coal 14 piled in the tubular, space between the housing and the walls of the'boiler 5. With this arrangement the coal may be charged intothe furnace without any regard to its even spreading, and it will burn evenly around the housing without formation of the blown-through holes and dead spots like in ordinary furnaces. The grate bars can be shaken in the ordinary manner for loosening coal and dropping the ashes. Thehousing can be turned I 1 by the hook 11 forbreaking slag, loosening coal and permitting the ashes to fall through the slots 13. I

The housing may be cast from a heat resisting ferro-alloy suchas nichrome or manganese steel.

Our generator can be used with any suitable furnace with grate bars 12 or 23 for coal or similar hard fuel, for boilers of low or high pres-Hi i slots serving as an additional gratej the slots'll being vertical, the removal of ashes is made easier, and a more economical combustion process can becarried on with even a low grade fuel in the vertical cylindrical space surrounding the housing. Fuel in this space remains in close contact with the inside walls of the furnace thereby maintaining them at ahigh temperature,

which is especially important when these walls form a partof the boiler. At the same time the generator itself provides a very efiicient' block, of a heating coilsupported under said block, pipes extending from said coil through said block, said pipes being adapted to support said block with said coil in the middle of a furnace, a tubular housing open at the bottom rota tively supported on said block and enclosing said coil, the Walls of said housing below said coil being provided with a plurality of apertures for air, and means to' rotate .said housing on said block for raking the coal piled in said furnace around said-housing.

2. In a water heater, the combination with a block, of a heating member supported on the under side of said block, intake and exhaust pipes extending from said member through said block and passing through the wall of a furnace, and

a tubular housing enclosing said member and rotatively supported on said block; the lower end of said housing being open, said pipes being adapted to support said block with said member and said housing in said furnace at a distance above the grate bars of said furnace, the walls of said housing being provided with a plurality of apertures for .air passing from said grate bars to the coal piled around said housing.

3. In a water heater, the combination with a block, of a container for water supported under said block, intake and exhaust pipes extending from said container through said block, and a tubular housing enclosing said container and rotatively supported on said block, the lower end of said housing being open, said housing with said container being adapted to be supported in a furnace above the grate bars, the walls of said housing being provided with apertures converging to the outside and forming nozzles for the air passing from said grates to the coal outside of said housing. I

4. In a water heater, the combination with a container for water, pipes extending from said,

container and adapted to support said container in a furnace, a tubular housing enclosing said container and arranged to be rotated on said container, the lower end of said housing being open and placed above the grate bars of said furnace, the walls of said container being provided with a plurality of apertures, and projections on the outside of said housing for raking coal piled around said housing when the latter is rotated.

5. In a water heater, the combination with a container for water, of a tubular housing rotativelysupported with its upper portion on said container and forming a hot air pocket around said containen the lower end of said housing being open, the walls of said housing below said container being provided with a plurality of apertures, and pipes extending from said container and adapted to support said container with said housing in the middle of a furnace withthe lower edge of said housing at a distance above the grate of said furnace, said housing being adapted to stir and to rake the coal piled in said furnace on said grate around said housing.

NATHAN K. KRAMAROFF. RICHARD KRAMAROFF.

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