US1473422A - Air heater for fuel burners - Google Patents

Air heater for fuel burners Download PDF

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Publication number
US1473422A
US1473422A US633177A US63317723A US1473422A US 1473422 A US1473422 A US 1473422A US 633177 A US633177 A US 633177A US 63317723 A US63317723 A US 63317723A US 1473422 A US1473422 A US 1473422A
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United States
Prior art keywords
preheater
air
stack
air heater
furnace
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Expired - Lifetime
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US633177A
Inventor
Henry S Farquhar
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Baldwin Locomotive Works
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Baldwin Locomotive Works
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Publication date
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Priority to US633177A priority Critical patent/US1473422A/en
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Publication of US1473422A publication Critical patent/US1473422A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M20/00—Details of combustion chambers, not otherwise provided for, e.g. means for storing heat from flames

Definitions

  • My invention relates to certain improvements in air heaters for fuel burners located in the flue of a furnace.
  • the object of my invention is to design the preheating apparatus so that the air will travel in a hehcal path therethrough, caus- 15 ing the air to impinge upon the outer surface of the preheater, which quickly increases the temperature of the air.
  • Fig. 1 is a vertical sectional view of the upper portion of an oil burning furnace, showing the air heater partly in section on the line 1-1, Fig. 2; and Fig. 2 is a sectional plan view on the line 2-2, Fig. 1.
  • 1 is the upper portion of an oil furnace.
  • 2 is the stack through which the products of combustion pass from the furnace.
  • 3 is a cylindrical preheater, preferably made of metal. Passing throng this preheater'is a vertical flue 4.
  • the preheater 1 s less in diameter than the stack so that the products of combustion pass around, the preheater, heating the outer walls to a high degree.
  • the products of combustion also pass through the flue 4's
  • the preheater is closed at the up per end byan annular cap plate 5 and at the lower end by an annular cap plate 6.
  • 7 is an air pipe through which cold air passes to the upper end of the preheater. It will be noticed that this air pipe communicates with the preheater at one side of the center, as clearly shown in Fig. 2, and that it-has a suitable valve 8 for controlling the amount of air passing to the preheater, which is under pressure.
  • an outlet pipe 9 for the preheated air Communicating with the lower end of the air heater is an outlet pipe 9 for the preheated air.
  • This pipe leads to a burner of any of the ordinary ty es.
  • This pipe also communicates with the ower end of the air heater and is arran ed tangentially, so that, when cold air is admitted to the preheater under pressure, it circulates in a helical path from the upper end thereof to the lower sired and is supported in the flue, in the present instance, by brackets 10, which rest on one of the courses of the brick work of the flue, as clearly shown in Fig. 1.
  • Other means may be used to support the air heater, if desired.

Description

Nov. 6, 1923.
H. s. FARQUHAR AIR HEATER FOR FUEL BURNERS Filed April 19, 1925 HENRY S. FARQUHAR, F WAYNE, PENNSYLVANIA, ASSIGNOR TO THE BALDWIN LOCOMOTIVE WORKS, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.
AIR HEATER FOR FUEL BURNEBS.
Application filed April 19, 1923. Serial No. 683,177.
T 0 all whom it may concern:
Be it known that I, HENRY S. FARQU'HAR,
a citizen of the United States, residing in Wayne, Radnor Township, Delaware County, Pennsylvania, have invented certain Improvements in Air Heaters for Fuel Burners, of which the following is a specification.
My invention relates to certain improvements in air heaters for fuel burners located in the flue of a furnace.
The object of my invention is to design the preheating apparatus so that the air will travel in a hehcal path therethrough, caus- 15 ing the air to impinge upon the outer surface of the preheater, which quickly increases the temperature of the air.
In the accompanying drawings:
'Fig. 1 is a vertical sectional view of the upper portion of an oil burning furnace, showing the air heater partly in section on the line 1-1, Fig. 2; and Fig. 2 is a sectional plan view on the line 2-2, Fig. 1.
1 is the upper portion of an oil furnace.
2 is the stack through which the products of combustion pass from the furnace. 3 is a cylindrical preheater, preferably made of metal. Passing throng this preheater'is a vertical flue 4. The preheater 1s less in diameter than the stack so that the products of combustion pass around, the preheater, heating the outer walls to a high degree. The products of combustion also pass through the flue 4's The preheater is closed at the up per end byan annular cap plate 5 and at the lower end by an annular cap plate 6. 7 is an air pipe through which cold air passes to the upper end of the preheater. It will be noticed that this air pipe communicates with the preheater at one side of the center, as clearly shown in Fig. 2, and that it-has a suitable valve 8 for controlling the amount of air passing to the preheater, which is under pressure.
Communicating with the lower end of the air heater is an outlet pipe 9 for the preheated air. This pipe leads to a burner of any of the ordinary ty es. This pipe also communicates with the ower end of the air heater and is arran ed tangentially, so that, when cold air is admitted to the preheater under pressure, it circulates in a helical path from the upper end thereof to the lower sired and is supported in the flue, in the present instance, by brackets 10, which rest on one of the courses of the brick work of the flue, as clearly shown in Fig. 1. Other means may be used to support the air heater, if desired.
I claim: 7
1. The combination in a heater for preheating air for a furnace, of a stack communicating with the furnace and through which the products of combustion pass from the furnace; a preheater located in the stack and around which the products of combustlon pass; an air inlet pipe communicating wlth one end of the preheater; and an outlet pipe communicating with the other end thereof, said pipes being arranged tangentially to the preheater so that air, under pressure, admitted to the preheater passes through it in a helical path.
' 2. The combination in a furnace, of a stack; a cylindrical preheater located in the stack; an inlet pipe communicating with the upper end of the preheater for the air under pressure; an outlet pipe at the lower end of $5 the preheater for heated air,'the two pies communicating with the preheater and 5-. ing arranged tangentially in respect thereto, so that the air passing down through the preheater travels in a helical path and impinges upon the inner surface of the walls of the preheater.
3. The combination in a furnace, of a stack; a cylindrical preheater located in the stack, said preheater being less in diameter 95 than the stack so as to provide a passage around the preheater for the products of combustion; an inlet pipe communicating with one end of the preheater; an outlet pipe communicating with the other end thereof, said pipes being arranged tangentially in respect thereto so as to cause air under pressure to travel in a helical path and impinge upon the inner surface of the preheater in its passage to theoutlet pipe.
4. The combination of, a furnace; a stack communicating therewith; a preheater l0- cated in the stack, said preheater being less in diameter than the stack; a flue extending longitudinally through the preheater; an inlet pipe communicating with the upper end of the preheater; an outlet pipe communicating with the. lower end thereof; and a valve EA'MAZQ for regulating the flow of air under pressure to the preheater, said pipes being arranged tangentially in respect to the preheater so as 10 to cause the air in circulation to travel in a helical path through the preheater.
HENRY S. FARQUHAR.
US633177A 1923-04-19 1923-04-19 Air heater for fuel burners Expired - Lifetime US1473422A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2610036A (en) * 1950-02-17 1952-09-09 Schock Gusmer & Co Inc Heater for wort kettles
US3115852A (en) * 1961-04-07 1963-12-31 Ernest E Robertson Combustion products condenser
US4243177A (en) * 1978-12-08 1981-01-06 Powers Edgar W Chimney heat capturing system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2610036A (en) * 1950-02-17 1952-09-09 Schock Gusmer & Co Inc Heater for wort kettles
US3115852A (en) * 1961-04-07 1963-12-31 Ernest E Robertson Combustion products condenser
US4243177A (en) * 1978-12-08 1981-01-06 Powers Edgar W Chimney heat capturing system

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