US1333868A - Refractory-brick construction for locomotive-boiler furnaces - Google Patents

Description

* I. MARTIN, In. REFRACTORY BRICK CONSTRUCTION FOR LOCOMOTIVE BOILER'FURNACES.

APPLICATION FILED OCT.

Patented Mar. 16, 192()7 2 SHEETSSHEET I.

I. C. MARTIN, In.

REFRACTORY BRICK CONSTRUCTION FOR LOCOMOTIVE BOILER FURNACES.

Patented Mar. 16,1920.

APPLICATION FILED OCT. II, I9I9. 1,333,868.

JESSE C. MARTIN, JR., 0F SAN FRANCISCO, CALIFORNIA.

REFRAcToEY-BRICK CONSTRUCTION Fon LoooMoTIVE-BOILER, EURNACES.

Specification of Letters Patent.

- Patented Mar. 16, 1920.

Application led October 17, 1919. Serial No. 331,372.

To all whom it may concern:

Be it known that I, JESSE C. MARTIN, Jr., a citizen of the United States, and a resident of San Francisco, county of San Francisco, and State of California, have invented certain new and useful Improvements in Refractory-Brick Construction for Locomotive-Boiler Furnaces.

The hereinafter described invention relates to the burning of hydro-carbon fuel in locomotive fire boxes wherein refractory lining is required to prevent-burning out of the exposed steel surfaces of the re box combustion chamber.

It is an object of the invention to place a hollow refractory brick structure at the front end of the fire box adjacent the tube sheet'thereof through which all of the air required to be introduced into the front of the re box for combustion purposes will be taken and to make the hollow brick structure of such length that, when it is set in place, it will extend rearwardly into the re box suiciently so that it will be thoroughly heated by the hot furnace gases, and air taken therethrough fromthe atmosphere at normal temperature, or cold air,

will be heated and prevented from' striking the tube sheet and exposed fire box sheets and seams, causing rapid expansion and contraction and consequently leakage, which, in locomotive practice, wherein the use of my inventionis amplified, means excessive cost for fire box and boiler maintenance, short life of metallic heating surfaces, and consequent loss of motive power in service.

Another object of the 'invention is to effect fuel economy by delivering air 'required at the front end of the re box for combustion purposes through a hollow refractory brick structure'heated by the furnace gases, thereby .heating the air and causing a lesser amount ,of oxygen for combustion to be required than when cold or normal temperature air is delivered into the fire box combustion chamber..

A further object of` the invention is to make a hollow refractory re brick or tile structure through which all of the hydrocarbon fuel injected. into the lire box 'from the burner and all -of the air required for combustion at the burner end of the fire box will betaken, thereby effecting an intermingling of fuel and air throu h the outlet of the tile structure into the re box combustion chamber and increasing the thermal efficiency therein.

Another object of the invention is to provide in a refractory lined hydro-carbon fuel burnin locomotive fire box, a hollow refractory gr the re box at the front end thereof, through which air, or fuel and air, are delivered into the fire box combustion chamber, and which will be substantially supported in place against jar and vibration of locomotive road service by the bottom refractory brick Hoor of the re box combustion chamber and the refractory brick end wall thereof.

In the accompanying drawings, Figure 1 is a sectional elevation of my hollow lrefractory brick structure set in place in a refractory brick lined locomotive lire box.

Fig. 2 is an end sectional view taken on line 2-2, Fig. 1.

Fig. 3 is a perspective view of the hollow refractory brick structure removed from the re box.

Fig..4= is an end view of a modified form of the hollow refractory brick structure.

Numeral 1 indicates a front end fired hydro-carbon burning refractory brick lined locomotive fire box combustion chamber of practice. Numeral 2 indicates one form of the hollow refractory brick structure set in the bottom of the pan between the refracto brick end wall, 3, and the refractory' brick bottom, 4., bein positioned against Wall, 3, by guide, 5. umeral 6 is a hydro-carbon burner set to discharge through hollow brick, 2, and 7 is a dam er ick structure extending into door for .admitting air throu h ho ow brick, 2,' into the combustion c amber, 1.

Numeral 8 indicates the lower rows of re.

suit and house the spray or jet of hydrocarbon fuel injected into the fire box therethrough, and in some lire pans forming the bottom of the fire box, the hollow brick may be constructed with unit members corresponding to the shape of the pan, for example, such as illustrated in Fig. 4.

In order to minimize the cost of manufacture and maintenance in service, as well as to better effect a close mixture and control lof air and hydro-carbon fuel therethrough, the roof of the hollow refractory structure can be made to set well below the 'top of the refractory end wall.

In practice the ollow refractory brick is highly heated by the hot furnace gases so that when atmospheric air is taken through dam er door, 7, into the fire box combustion c amber, 1, the air is heated to a relatively high degree and cold air is entirely prevented from striking the exposed tubes, 8, sheets, 9, and seams, 10, of the fire box, as at present, which causes excessive leakage, expensive maintenance and rapid deterioration of fire box with locomotives out of service as a consequence, and in addition thereto, they leakage onto the highly heated refractory bricks causes rapid expansion and contraction which cracks and destroys the bricks causing expensive maintenance of same.

What I claim is:

l. In a refractory lined locomotive fire box, a hollow refractory brick constructed of unit members positioned by and extending rearwardly of the refractory front wall thereof and held in place therein by the bottom refractory floor of the lire box whereb an air passage is provided through the bric into the fire box combustion chamber.

2. In a refractory lined' locomotive fire box, a hollow refractory brick constructed of unit members abutting and extending rearwardly of the refractory front wall thereof, said brick being supported on the bottom floor of the frebox and held in place therein intermediate the refractory front wall and refractory bottom ioor of the fire box whereby an air passage is provided throu h the brick into the lire box combustion c amber.

3. In a refractory lined locomotive lire box, a hollow refractory brick constructed of unit members positioned by and extending rearwardly of the refractory front wall thereof, said brick being supported on the bottom-of the fire box and held in place therein by the bottom refractory floor of the fire box, a damper door communicating with the hollow brick whereby an air passage controlled by the damper door is provided through the brick into the fire box combustion chamber.

4. In a refractory lined locomotive fire box, a hollow refractory brick constructed of unit members abutting and extending rearwardly of the refractory `front wall thereof, said brick being supported on the bottom floor of the fire box and held in lace therein intermediate the refractory ront wall and refractory bottom floor ofthe fire box, a damper door Communicating with the hollow brick whereby an air passage controlled by the damper door is provided through the brickpinto the fire box combustion chamber.

5. In a refractory lined locomotive yfire box, a hollow refractory brick constructed of lunit members positioned by and extending rearwardly of the refractory front wall thereof, said brick being supported on the bottom of the tire box and held in place therein by the bottom refractory floor of the fire box, a damper door communicating with the hollow brick and a hydro-carbon burner set to discharge within the hollow brick whereby air through the damper door 'and hydro-carbon fuel from the burner are de-V livered through the hollow brick into the fire box combustion chamber.

6. In a refractory lined locomotive fire box, a hollow refractory brick constructed of'r unit members abutting and extending rearwardly of the refractory front wall thereof, said brick being supported on the bottom floor of the fire box and held in place therein intermediate the refractory front wall and refractory bottom Hoor of the fire box, a damper door communicati with the hollow brick and a hydro-carbon urner set to discharge within the hollow brick whereby air through the' damper door and hydrocarbon fuel from the burner are delivered through the hollow brick into ,the fire box combustion chamber. y

7. In combination, a'locomotive rebox, a fire pan secured to themud ring of the rebox, a hollow refractory structure composed of bottom, side and arched roof bricks supported within the fire pan to extend rearwardly of the refractory front wall thereof, a damper communicating with the hollow refractory structure and a hydro-carbon burner set to dischargev within the hollow refractory structure whereby an air passage controlled by the damper is provided through the refractory structure and whereby hydro-carbon fuel from the burner is delivered through the refractory structure into the irebox combustion chamber.

8. In combination, a locomotive rebox, a

communicating with the hollow refractory the refractory structure into the rebox comstruture and i hydro-callblln burnefr set to buston chamber. l disc arge wit in the o ow re ractory I structure whereby an air passage controlled JESSE C' MARTIN JR' 5 by the damper s provided through the re- Wtnes'ses:

ractory structure and whereby hydro-car- K. E. KLEIN, bon fuel from the burner is'delvered through F. L. BROWNE.

Images