US1305176A - smythe - Google Patents

Description

H. E. SMYTHE.

PREHEATING APPARATUS FOR FURNACES. APPLICATION FILED IAN. 23|19I9 I. ,305A Y@ Patented May 27, 1919.

2 SHEETS-Sunni.

WITNESS INVENTOR.

H. E. SMYTHE.

PREHEATING APPARATUS FOR FURNACES. APPLICATION FILED IAN. 23. I9I9.

L305,1?6 Yatented May 27, 1919.

2 SHEETS-SHEET 2.

WlTNESS INVENTOR.

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pas sans nanna HORACE E. SMYTHE, 0F PITTSBURGH, PENNSYLVANIA, ASSIGNOR T0 THE S. R. SIVIYTIIE COMPANYQOF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF WES-T VIRGINIA.

PREI-IEAIING APPARATUS FOR FURNACES.

Specification of Letters Patent. f

Patented May er, taie.

Application led January 23, 1919. ySerial N o. 272,645.

To all whom t may concern:

Be it known that I, HORACE E. SMYTHE, a citizen of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have inventedv new and usef-ul Improvements in Preheating Apparatus for Furnaces, of which the following is a specication.

My invention relates to apparatus for` preheating lair, gas, or both for furnaces.

The principal object of this invention is to provide a preheating 'apparatus for gaseous substance, as air and producer gas, for example, which has a minimum of horizontal surfaces for the reception of dust, 1a maximum heating and radiating surface, and improved facilities for cleaning dust from the flue surfaces and from the apparatus itself.

Referring to the accompanying drawings, Figure 1 is in part a plan and in part a horizontal section yconstructed in accordance with my invention; Fig. 2, a vertical section on the line II-II, Fig. 1; and Fig. 3, a vertical cross-section on the line III-III, Fig. 1.

On the drawing, 1 and 2 designate a pair of structures for preheating air or gas preliminarily vto their introduction into la furnace of the reversing type. 3 and 4 are the necks leading to a reversing furnace, not shown, while 5 and 6 are passages leading to the stack 7 or to a supply of gas or air, according to the position of the reversing valves. As my invention lies entirely in the structures 1 .and 2, it is not necessary to illustrate the usual reversing valves and the usual passages by which these structures may be connected alternately to the stack and the air or gas supply.

As the structures 1 and 2 are alike, the structure 1 only will be described, in which 8 is the bottom or licor, 9 the top or roof, and 10 and 1l the sides. The structure 1 has a large chamber provided with several baffles or walls 12, 13, 14C, 15, 16, and 17. These baffles except 17 start alternately from the sides 10 and 11 and stop somewhat short of the opposite side, having a short-circuiting passage 13, so that from the neck 3 to the passage 5 there is formed a tortuous or zigzag regenerator flue or passage. The baffle 17 is shown as separated from the wall 11, so that the air or gas is divided on opposite sides thereof, but this baffle may reach the wall l1 if the draft through the structure 1 is suficiently strong. If necessary to increase the rate of. flow of fair or gas, the

"baffles 12 to 16, or some of them, may have the 'short-circuiting passages 18 in their walls in line with the passages 19 through lwhich the air or gas passes from one side of between consecutive baffles.

The sides of the structure 1 are provided with arched doors 21 built opposite the sev* eral members kof the said tortuous flue or Fpassage so that they may be opened for the purpose of cleaning the interior and removing the accumulated dust, or other foreign matter carried in suspension. These doors may be of any type, such as swinging or sliding, but I have shown them to be composed of removable walls filling the arched doorways. 'Io clean the walls of this tortuous passage, I insert air or steam nozzles through the openings 22 in the roof 9 adjacent to the faces of the several walls 12 to 17, and the rear wall 23. I do not conline myself to any specific location of the openings 22 as they may be located adjacent to any portion of the said walls.

It will be understood, for example, that the hot waste gases from the furnace may enter the structure 1 by way of the neck 3, whereby the exterior walls, the iioor, the roof, and both sides of the baflies 12 to 17 will become highly heated, these gases iinally leaving through the passage 5 on .their way to the stack 7; and that at the same time air or gas may pass through the passage 6 and the structure 2 and the neck 4, all preheated, to the said furnace. If o ne pair of structures be used to preheat alr, another pair may be provided to preheat gas, the air and gas being brought in a manner well known, to the furnace cham- Y the structure 2 to the stack. When the structure 2 becomes highly heated again, the flow of all the gaseous materials 1s again reversed. This alternation Vis continued while the furnace is in operation.

It is seen that my regenerator provides no horizontal surfaces for the collection of dust, and the clogging and the insulating of the passages. I provide a maximum area of heating and radiating surfaces for the lsize of the structures l and 2, which may have any practical capacity and any practical'number of baliles, with or without the short-circuiting passages 13. No tearing down of the structures, except at the doorways, where brick doors are used, is required for cleaning them. v

I claim:

1.- In a preheating structure for air, gas,

or the like, a chamber having an inlet and an outlet, and between the same a series of bailes arising alternately from the sides of the chamber and stopping short of the opposite side thereof, and also extending from l the floor to the roof whereby a tortuous heating and radiating passage is provided between the said inlet and outlet and no hori- Copies of this patent may be obtained for zontal places for the lodgment of dust are provided.

2. In a preheating structure vfor air, gas,

or the like, a chamber having an inlet'and an outlet,V and between the same a series ofV baffles arising alternately from the sides of the chamber and stopping short of the op-Y positeside thereof, Vand also extending from provided.

3. In a preheating structure for air, gas,

,Y or the like, a chamber having an inlet and an outlet, and between the same a series of Ybaffles arising alternately from the Vsides of the chamber and stopping short of the opv posite side thereof, whereby a tortuous heating and radiating passage is provided between the said inlet and outlet, and shortcircuiting passages in some of the baffles.

Slgned at Pittsburgh, this 15th day of January, A. D. 1919.

HORACE E. sMYrHE.

ive cents each, by addressingtheY Commissione-r of Patents, Washingtonm. 0.

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