US1084782A - Steam-boiler. - Google Patents

Description

U. BERETTA & B. GIANESE. STEAM BOILER. APPLIUATION FILED 111111.19, 1912.

1,084,782, Patented Jan. 20, 1914.

UBALDO BERETTA AND BENVENUTO GIANESE, OF GENOA, ITALY.

STEAM-BOILER.

To all whom t may concern.'

Be it known that we, UBALDO BERETTA and BENVENUTO GIANnsn, both subjects of the King oit Italy, residing at Genoa, Ttaly, have invented certain new and useful mprovements in Steam-Boilers, ot' which the follow ing is a specification.

Our invention has 'for its object to provide an apparatus to be used in steam boilers ot' every type for improving the combustion.

It is well known that part of the volatile material contained in the coal is not consumed but leaves the chimney without contributing in any way to the etliciency ot the boiler.

It is the object ot' the present invention t-o construct an apparatus permitting the products of combustion to combine with the oxygen ot the atmospheric air introduced into the combustion chamber and of increasing in this manner the etliciency of the coal burnt on the grate.

In the accompanying drawing Figure 1 is a longitudinal vertical section through part of a boiler embodying our invention. Fig. 2 is a longitudinal horizontal section thereof, and Fig. 3 is a detail view illustrating the manner of securing the pipes and staii's. Fig. 4l is a section on line 3?, Fig. 2, and Fig. 5 is a detail top plan view of a staff and plates.

Tnto the secondary combustion chamber otl a boiler as shown in Fig. 1 a plurality of plate elements B composed of refractory material is introduced. These elements become incandescent at about-1400o F. and produce a better chemical affinity between the products of combustion and the oxygen of the atmospheric air. These plate elements are supported by the staffs A composed of refractory material (principally magnesia silicates), of about 3600D F. lire resistance. The staffs A are secured in the pipe T3 and eX- tend through the pipe Gr4 as shown in Fig. 3.

The oxygen of the atmospheric air which enters a chemical combination with the volatile materials oit the coal is introduced by means of the pipes T1 which traverse the combustion chamber and are arranged within two heating pipes T2 of the furnace (see Figs. 1 and 2). The air entering into the pipes T1 is heated by the influence of the boiler water and while traveling through the pipes T3 its temperature is increased, whereafter it passes into the secondary combustion Specification of Letters Patent.

Application filed March 19, 1912.

lateuted Jan. 20. 1914.

Serial No. 684,735.

chamber and passes the open holes in the pipes T5 and TA1 opening into pipes T. A valve V at one end of the pipe T1 controls the regulation oi the air which is supplied. The two pipe pieces T4 are secured to the heating pipes by means oi.' a tie-rod L, nut and lock nut C and D. As a supplementary means t'or more intimately mixing the oxygen of the atmospheric air and the combustion gases a certain quantity of air is also introduced and distributed by means of a flue K.

It is generally known that the gases leaving the furnace at a speed of about 16 to 20 feet per second are rapidly contacting with the tube plate and consequently suffer a con siderable loss of temperature of about 930 F. and become well adapted ior the production oi' soot. This is a frequent occurrence especially with the ordinary marine boilers and locomotive boilers.

Vith the present appliance the gases are obliged to travel a longer distance within the combustion chamber heilig restrained by said appliance and obliged to pass across it. Thus a supplemental combination of the products of combustion and the oxygen of the atmospheric air is produced in the combustion chamber ot' a boiler, which combination produces an increase oli' temperature and a considerable decrease in the smoke developed and consequently an important increase in the efficiency of the boiler.

It is clear that the stati' A may be made oi any suitable material, shape, and may be differently arranged, and, that the elements B may be substituted by elements of any other suitable incandescent material and iinally also the pipes T1, T3, and T" may be arranged in any dierent suitable way without departing from the scope of the present invention.

We claim:

1. A tubular boiler having a passage for the products of combustion, in combination with upper and lower pipes extending from the tubes of the boiler' into said passage and provided with openings discharging air into said passage, a plurality of perforated circular plate elements of refractory material interposed in the path of the products of combustion to retard the passage of the same and spaced from each other, inclined stais of refractory material mounted on said pipes and extending across the path of the prodoal, and flat perforated plates of a refractory material mounted on said staffs in spaced relation With respect to eaoh other, substantially as described.

In testimony whereof We affix our signatures in presence of two Witnesses.

UBALDO BERETTA. BENVENUTO GIANESE.

nets 0f combustion for supporting said plate elements, substantially as and for the purpose set forth.

2. A tubular boiler having a passage for the products of combustion, in combination with upper and lower pipes extending from the tubes of the boiler into said passage and provided with openings discharging air into said passage, stas mounted on saidv pipes `Witnesses: and extendingaoross the path of the prod- JAMES B.l YOUNG, uots of combustion at an angle to the Verti- C. A. YEMAN.`

Copiers of this patent :may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C.

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