US1575793A - Furnace - Google Patents

Description

J. REID March 9 1926.

FURNACE Filed May 10 1924 Jaw Bea Patented Mar. 9, 1926.

UNITED ST'I'S JOHN REID, OF LONDON, ENGLAND.

FURNACE.

Application filed May 10, 1924.

To all whom it may concern:

Be it known that I, JoI-IN REID, a subject of the King of Great Britain and Ireland, residing at London, England, have invented Improvements Relating to Furnaces, of which the following is a specification.

In the distribution of air to furnaces it frequently happens, particularly in forced draft furnaces, that streams of air meet in the furnace front and obstruct the even flow of the air into the furnace, results being that the air has to be subjected to greater pressure than is really necessary and that surges and eddies are set up and the flame unevenly supplied with air which however reaches it at high velocity; under these conditions eflicient and economical combustion cannot be attained.

The object of the present invention is to overcome these disadvantages, more especially in forced or mechanical draft furnaces burning liquid fuel.

According to the invention, the air is admitted to a circular air pocket in the furnace front and is gradually diverted by an irregular or ceratoid cusp shaped plate so as to flow in the desired direction, for instance in the case of an oil burning furnace, spirally around the interior of a cylinder, part of the wall of which is cut away to admit the stream of air. This cylinder is mounted in the front opposite the opening into the furnace and the burner tubesurrounded, it may be, by a perforated or slotted air distributing sleeve, extends through it. Some of the air may also flow around the exterior of the cylinder which itself may be perforated or slotted. The ceratoid cusp shaped plate may be adjustable within the furnace front, and may be secured to the flare or the ashpit door.

In the accompanying drawings the invention is illustrated as embodied in a sectional front for a furnace convertible for burning either coal or oil, the front being shown fitted for burning oil, but it is to be understood that the invention may be embodied in other forms of furnace fronts.

Fig. 1 is a vertical longitudinal section through the front and Fig. 2 a front elevation partly in section.

a and b are the front and back plates of the front each being formed with projecting portions which meet and form the flare c and the fuel casing or firebox (Z, the bottom Serial No. 712,382.

of which is closed by a removable sill when coal is being burned; e is an air casing with regulating air valve 7 and g, g are valves admitting air to the lower part of the air pocket within the front. This construction is well known. I

To the flare 0 a ceratoid cusp shaped plate 72, is removably secured in a position to the right of the centre line of the front so that air entering by the left hand valve g will be gradually diverted upwardly into the fuel casing or firebox (Z which is fitted with a removable air guide or cylinder z' the lower part of which is cut away as shown. The oil burner tube 7: extends through the air guide or cylinder 2' and the air flows spirally around it and through the opening Z in the fire brick partition m which closes the mouth of the furnace. The plate It may be extended to the partition m.

Usually only the left hand valve 9 will be open but if the right hand valve g is also open the air admitted therethrough will also be diverted in a similar, though less gradual manner by the other side of the cusp shaped plate h, the two streams thus being blended smoothly into a stream which enters and flows spirally around the interior of the cylinder 2'.

In the case of a multiple furnace steam boiler, the wing furnaces may be fitted with ceratoid cusp shaped plates set respectively to the left hand (as shown) and right hand of the centre line of the front.

What I claim is 2- 1. In a furnace front having a circular air pocket therein, a ceratoid cusp shaped device adapted to gradually divert air admitted thereto from either side of said device so that it flows inthe desired direction to said pocket, substantialy as described.

2. In a furnace front, the combination of a ceratoid cusp shaped plate adapted to gradually divert air admitted thereto of a partial cylinder into which the stream of air is diverted and around the interior of which it flows spirally to the opening into the furnace, substantially as described.

3. The combination with a furnace front having laterally disposed air inlet openings and a rear outlet to the furnace, a ceratoid cusp-shaped plate located within the front so as to present concave surfaces to the flow of air and gradually divert the air towards the outlet from the front to the furnace.

a. In combination with a furnace front l fl:

6. In combination with a furnace Front having laterally disposed air inlet open ings, a cera'toid cusp-shaped plate located within the front so as to present concave surfaces to the low of air on opposite sides of said front and gradually divert the air in opposing streams until blended in a common stream; each of said concave surfaces being in the form of the segment of a circle and one of the circles described by the segments being of larger d1ameter than the other.

Signed at New York c1.ty,N. Y., U. ti. it, this 9 day 0'] lllay, 1924. I

JOHN REID.

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