US1840306A

US1840306A - Furnace

Info

Publication number: US1840306A
Application number: US235410A
Authority: US
Inventors: Beecher Henry Ward
Original assignee: Fuller Lehigh Co
Current assignee: Fuller Lehigh Co
Priority date: 1927-11-25
Filing date: 1927-11-25
Publication date: 1932-01-12
Anticipated expiration: 1949-01-12

Description

Jan. 12, w BEECHER FURNACE Filed Nov. 25, 192'? 2 Sheets-Sheet 1 1 IIIIIIIII M I;-IIIlIlllll v I I g M INVENTOR BY WWI-M ATTORNEYS Jan. 12, 1932. H. WKBEECHER 0 7 FURNACE Filed Nov. 25. 1927 2 Sheets-Sheet 2 W INVENTQR Patented Jan. 12, v 1932 UNITED STATES PATENT, OFFICE HENRY WARD BEECHER, or SEATTLE, wAsnrnen-roa, ASSIGNOR, BY Mnsivn ASSIGN- MEN'IS, r FULLER LEHIGH COMPANY, A CORPORATION or DELAWARE FURNACE Application filed November 25, 1927. Serial No. 235,410.

tical section through the furnace, partly broken away; Fig. 2 is a section along the line 22 of Fig. 1; and Fig. 8 is a section at right 7 angles to Fig. 2 along the line 33 thereof.

In the drawings reference character 1 in dicates an oven in front of the combustion space proper of a boiler furnace into which oven solid fuel is introduced through the chute 2 and is ignited. The combustion products pass over the bridge wall 3 into the combustion space 4 of the furnace. The bridge wall 3 maybe made hollow and air for combustion purposes passes into it and thence through the openings 5 into the combustion space 4. The furnace has side walls 6 and a floor 7. An opening 8 is provided at the rear of the combustion space 4 immediately above the floor and a burner 9, for gas, oil or pulverized fuel, is located in the upper portion of the opening 8 and extends through the rear wall. Dampers 10 are located in the opening 8 and serve for regulating the supply of air to the furnace.

A series of horizontally disposed plates 12, superposed one above the other, is located below the burner 9 with the edges of each of the plates extending farther into the furnace than the one immediately above it. Each of the plates 12 may be made in sections, if desired, and brick or-spacing blocks 13 of refractory material are placed between the plates12 and spaced from each other, so as to. leave openings 14 through which air enters the furnace. The openings 14 are preferably so disposed that a wider series of openings is provided below the lower plates than below those near the top, as indicated in Fig. 2, so that the number of air openings gradually diminishes from the lower to the upper plate 12. One edge of each of the plates 12 is supported by cross supports 15 that may be L-shaped in cross section, and the ends thereof project into recesses 16 in the wallsof the furnace, and the other edges ofthe p'lates are supported by resting upon the brick or blocks 13 below the same.

. The operation-is as follows: WVhen it is desired to operate the furnace with fuel from the burner 9 only, the dampers 10 are regulated so as to provide the proper amount of air for the combustion, and the openings provide for proper distribution of the air. Any ash or slag that falls upon the projecting edges of the plates 12 can be removed by simply pushing the same off through the holes 14 so thatthe air, passages will not become blocked. When it is desired to burn solid fuel, the same is introduced into the oven through the chute 2. Cinders that pass over the bridge wall 3 and fall upon the plates 12 will burn and the ashes that collect upon theseplatescanbe removed as above described so that combustion air will have access to the fuel entering through the burner 9, as desired. It will be obvious that both solid fuel and fuel introduced through the burner 9 can be burned in this furnace at the same time. The furnace is especially useful in burning waste products from paper mills or saw mills or waste bagasse from sugar plants, or any other furnace wherein two different types of fuel are to be burned independently in different portions of the furnace enclosure, either concurrently or alternatively.

I claim:

1. In combination, a furnace, an oven for burning solid fuel in front of said furnace, a passageway for the hot products of combustion from said oven to said furnace, a fuel burner, and a plurality of air supply ducts with ledges above them extending progressively into said furnace below said burner to receive ashes and other material from said oven.

2. In combination, a furnace, an oven for burning solid fuel in front of said furnace, a bridge wall between said oven and said furnace, a passageway for the hot products of combustion from said oven to said furnace over said bridge wall, a fuel burner, and a plurality of air supply ducts with ledges above them extending progressively into said furnace below said burner to receive ashes and other material from said oven.

3. In combination, a furnace, an oven for burning solid fuel in front of said furnace,

a passageway for the hot products of combustion from said oven to said furnace, a hollow bridge wall between said oven and said furnace provided with air ports into said furnace, a fuel burner, and a plurality of air supply ducts with ledges above them extending progressively into said furnace below said burner to receive ashes and other material from said oven.

4. In a furnace, a fuel burner, and a series of rectangularly shaped air supply ducts extending horizontally. into said furnace below said burner, said ducts being arranged in rows with the lower rows wider than the upper ones and being made up of superposed plates each extending into said furnace farther than the one above it with vertical partitions between said plates.

5. In a furnace, a burner adapted to project a stream of combustible material into said furnace, and a series of parallel air supply ducts extending into said furnace to different distances below said burner, said ducts being formed by parallel plates with spacing blocks between them.

HENRY WARD BEECHER;