US1891534A - Heater for liquids - Google Patents

Description

Dec. 20, 1932. A. T. GRAY HEATER 'FOR LIQUIDS Filed Jan; 17, 1931 v glwwntoz J4nc2 rew T Gray;

away/M1 4 Patented Dec. 20, 1932 UNITED STATES PATENT OFFICE ANDREW TENNANT GI R-AY, OF LOS ANGELES, CALIFORNIA, ASSIGNOR TO FACIFIC PIPE AND SUPPLY COMPANY, OF LOS ANGELEs CALlFoRN IA, A CORPORATION 01 CALIFORNIA HEATER roaL Ums I,

Application filed. January 17,1931. Serial No. 509,446.

7 This invention relates to heaters for liquids and it is useful, for example, in the heating of water or oil.

An important object of the inventlon is the i minimization of liming or the formation of scale or other incrustations or coatings that make difficult the penetration of heat therethrough.

Another important object is simplicity of construction. 7

Other objects and advantages will appear in the subjoined detailed description.

The accompanying drawing illustrates the invention.

Figure 1 is a vertical mid section of a heater for liquids constructed in accordance with the provisions of this invention.

Figure 2 is a horizontal section of the heater on the plane indicated by the line 22,

Figure 1.

Referring to the drawing, there are provided an outer shell or jacket 3, an inner container 4 for the secondary liquid, within the shell 3, and an outer container 5 the Wall of which is between the shell 3, and wall of the inner container 4, and spaced therefrom. Between the containers 3, 5 is a flue shell or partition 6 which, in conjunction with the container 3, forms an annular chamber 7 for the primary liquid which is directly heated. The flue shell 6 in conjunction with the wall of the outer container forms an annular flue or passage 8 for combustion gases from a burner 9 whichis positioned beneath the low er-head or bottom 10 of the container5. The flue shell 6 has an opening 11 in its top or upper head 12 and connected with said open ingis an outlet 13 which passes through the chamber 7 and through an opening 14 in the top 15 of the container 3. The flue shell 6 terminates at its lower end in a flange 151 that constitutes a closure for the lower end of the chamber 7. The space between the flue shell 6and the outer container 5 is open at its lower end to form an annular flue.

Between the walls of containers 4, 5, is a chamber 16 for the primary liquid heating element and this chamber communicates with the chamber 3 through passages formed by sleeves 17, 18. The passage at 17 communi catesbetween the upper heads of the. flue shell and, outer container 5, while the passages 18- communicate between the sides of the. flue shell and outer container. The sleeve 17 connects the heads and suspends the outer container 5. There are preferably two sleeves 18 onthe same side of the heater.

The secondary liquid, which is to be heated, indirectly is held by the inner container 4 and flows to and from said container through nipples 19 which extend through the sleeves 18 and through openings 20 in the side wall of the container 3. The nipples 19 are threaded, or otherwise secured, at 21 in the side wall of the inner container 4.

Extending vertically through the container 4 is a tube or tubes '22 which are open at their opposite ends so as to communicate with the chamber 16. Thus the primary liquid fills the tubes 22 as well asthe chambers 7, 16 r or waterservice pipes. A suitable primary liquid or liquid heating element will becharged into the chamber 7 through the port 23 in sufficient quantity to fill the chambers 7, V

16 and tubes 22. This primary liquid may be, for example, water and preferably water of a relatively slight scale forming characteristic.

Upon operation of the burner 9, the heat produced by the burner will surround the outer container 5 and the products of combustion will pass upwardly through the annular flue 8, thus heating the liquid in the chambers 7, 16. It will be noted that there is a high de-' gree of efliciency in the heater because of the products of combustion passing between the two chambers 7 16, insuring that most of the I 0 heatunits are removed from the products of combustion before said products flow out of the heater through the flue pipe 13.

Heat will be transmitted from the water in the chamber 16 through the wall of the container 4 to whatever liquid is within said container 4, thus heating said liquid. It will be seen that the heat from the burner does not come into direct contact with any wall that is directly exposed to the liquid that is to be heated in the chamber 1. \Vhile it is advisable to have some circulation between the water jacket 7 and the interior of the outer. container 5, such circulation should not be too greatly encouraged by the construction. For this reason, the two communicating openings at 18 on the side walls and adjacent the nipples 19 are preferably located on thesame side of the heater, and the remainder of the circumference of the heater is preferably devoid of communicating openings. This increases the efficiency of the heater because it reduces somewhat the temperature of the outermost shell of the heater, which radiates its heat to the atmosphere.

One of the advantages of the construction illustrated is that the outer container 5 is suspended from above at the point 17, thereby permitting unrestricted expansion of the outer container 5 in a downward direction. Of course, as the temperatures difl'er between the outermost shell or jacket and the shell of the outer container 5, there would be a slight up or down displacement of the inner ends of the nipples 21. Such a movement is, of course,

permitted by reason of the fact that the sleeves 18 are of considerably larger diameter than thenippl'es so as to give ample clearance of thesepoints'.

The natural spring or resilience in the jacket wall also enables the construction to adapt itself readily to changing temperatures.

I realize that the use of a liquid such as water as a heating element or medium is not new, but the construction hereinbefore described has certain novel features which are more particularly pointed out in the appended claims.

It is desirable to connect the container 3 with an expansion chamber and, accordingly, a pipe 26 is connected with the top 15. The outer container 3 may also be'pi'ovided with a drain opening 27 normally closed by a screw plug 28.

In order to properly adjust the air mixer 29 of the burner it is desirable to observe the flame while. adjusting it and, therefore, I provide a peep hole that is formed by the bore of a sleeve 30 that projects through the container 3 and the flue shell at the level of the burner. The outer end of the sleeve 30 is normally closed by a screw plug 31.

The flange 151 rests upon legs 32 of any suitable construction.

I claim:

1. An indirect heater for liquids, having an outer jacket, a flue shell within the acket and spaced from the acket so as to form an outer liquid space for the primary liquid, an outer container for the primary liquid to be heated mounted within the flue shell with its wall spaced therefrom so as to form an annular flue surrounding the outer container, a pair of sleeves passing through the flue shell and the wall of outer container so as to open communication.between the said outer liquid space and the interior of the outer container, an inner container forthe secondary liquid located within the outer container, said inner container having heads with upright tubes passing through the same and through the inner container to enable the primary liquid in the outer container to circulate through the tubes, a nipple corresponding to each sleeve secured in the outer jacket and in the wall of the inner container and passing through its corresponding sleeve to enablethc secondary liquid to be circulated through the inner container, and means for heating the outer container at its lower end to cause circulation of the primary liquid through the tubes. 7

. 2. An indirect heater for liquids, hlving an outer jacket, a flue shell within the jacket and spaced from the jacket so as to form an outer liquid space for the primary liquid, an outer container for the primary liquid to be heated mounted within the flue shell with its wall spaced therefrom so as to form an annular flue surrounding the outer container, a pair of sleeves located on the same side of the shell and passing through the flue shell 1m and the wall of the outer container so as to open communication between the said outer liquid space and the interior of the outer container, an inner container for the secondary liquid located within the outer container, said inner containerhaving heads with up right tubes passing through the same and through the inner container to enable the primary liquid in the outer container to circulate through the tubes, a nipple corresponding toeach sleeve secured in the outer jacket and in the wall of the inner container and passing through its corresponding sleeve to enable the secondary liquid to be circulated through the inner container, and means for heating the outer container at its lower end to cause circulation of the primary liquid hrough the tubes.

An indirect heater for liquids, having an outer jacket, a flue shell within the acket and spaced from the jacket so as to form an outer liquid space for the primary liquid,

an outer container for the primary liquid to be heated mounted within the flue shell with ,1 its wall spaced therefrom 'so as to form an annular flue surrounding the outer container, a pair'of 'sleeveslocated on the same side of the shell and passing through the flue shell and the wall of the outer container so P as to, open communication between the said outer liquid space and the interior of the outer container, an inner container for the secondary liquid located within the outer container, said inner container having heads with upright tubes passing through the same and through the inner container to enable the primary liquid in the outer container to circulate through the tubes, a nipple corresponding to each sleeve secured in the outer jacket and in the wall of the inner container and passing through its corresponding sleeve to enable the secondary liquid to be circulated through the inner container, means connecting the upper ends of the flue shell and the outer container for supporting the latter,

and means for heating the outer container at its lower end to cause circulation of the primary liquid through the tubes.

4. An indirect heater for liquids, having an outer jacket, a flue shell within the jacket and spaced from the jacket so as to form an outer liquid space for the primary liquid, an outer container for the primary liquid to be heated mounted within the flue shell with its wall spaced therefrom so as to form an annular flue surrounding the outer container, a pair of sleeves passing through the flue shell and the wall of the outer container so as to open communication between the said outer liquid space and the interior of the outer container, an inner container for the secondary liquid located within the outer container, said inner container having heads with upright tubes passing through the same and through the inner container to enable the primary liquid in the outer container to circulate through the tubes, a nipple corresponding to each sleeve secured in the outer jacket and the wall of the inner container and passing through its corresponding sleeve to enable the secondary liquid to be circu-- lated through the inner container, a sleeve connecting the upper ends of the flue shell and the outer container located substantially on the central axis of the heater, and an outlet flue located toward one side extending and through the outer jacket and flue shell for circulating the secondary water through the secondary container, means for effecting communication between the water jacket and the interior of the outer container, and means outwardly from the upper end of the flue shell and passing through the upper head of the jacket.

5. An indirect heater for liquids,'having an outer jacket, a flue shell within the jacket and spaced from the jacket so as to form a water jacket for the primary water, an outer container for the primary water mounted within the flue shell with its wall spaced therefrom so as to form an annular flue surrounding the outer container, said flue shell having an upper head and said outer container having an upper head adjacent the same, means for directly connecting the heads to support a portion of the weight of Y the outer container on the flue shell head, an inner container for the secondary water mounted within the outer container, nipples passing through the walls of said containers

Images