Improvements in Apparatus for Heating Water or for Generating and Superheating Steam.
Year: 1899

page_text: Date of Application, 1st Apr., 1899
Complete Specification Left, 1st Jan., 1900-Accepted, 3rd Feb., 1900
PROVIDIONAL DIEVITICATION.
Improvements in Apparatus for Heating Water or for Generating and
Superheating Steam.
I, HUGH MCPHAIL, of Manygates House, Wakefield, in the County of York,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to apparatus for heating water or for generating and
superheating steam.
According to my invention I arrange one or more series or nests of tubes
curved or bent into a form somewhat resembling the letter ✓ but having the
angle rounded or nearly semicircular in shape. These tubes are preferably
placed with one member or leg over the other, the upper member being hori-
zontal or nearly so. Both ends of every tube of one series or nest open into a
vertical tube or chamber, which serves both as a header or down tube, and as
a water chamber or steam box as the case may be. The separate vertical tubes or
chambers are placed in communication with each other by pipes or, in a steam
generator, by a drum disposed above the water level. Suitable valves may be
arranged in the connections whereby any section-consisting of the vertical tube
or chamber and the series or nest of curved tubes can be disconnected from the
others or from the drum.
Each section is preferably arranged in a chamber or recess in a suitable
furnace; and when my improved apparatus is to be used as a water heater or
steam generator the grate may be disposed below one or more of such sections,
the products of combustion being compelled to pass between or around the tubes.
of all the sections employed before reaching the main flue.
When my improved apparatus is employed for generating and superheating
steam, the section or sections in which the steam is superheated may be disposed
either immediately over the grate or at such part of the furnace as is desirable.
A baffle plate or plates may be arranged between the upper and lower members
of the curved tubes to cause the hot gases to travel in a curved path coinciding
with the curve of the tubes.
When two or more sections are employed as steam generators, their vertical
tubes or chambers may be connected at or near the bottom thereof to feed and
mud drums, or each chamber may be fitted with feed connections so arranged
that the same connections will serve both for feeding and blowing off. Each
section may also if desired be provided with a pressure gauge, relief valve and
other boiler fittings.
I sometimes arrange two or more sections in one furnace chamber, the vertical
tubes of the sections being disposed alternately at opposite ends, so that the
curved tubes overlap or interlace. In a combined steam generator and super-
heater thus arranged I separate the superheating sections from the steam generat-
ing sections by a partition wall or plate.
Tthin 14 days of Annil 1800
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.

page_text: Improvements in Apparatus for Heating Water or for Generating and
Superheating Steam.
.KOITADIO AXORITORY
I, HUGH MCPHAIL, of Manygates House, Wakefield, in the County of York,.
Engineer, do hereby declare the nature of this invention-and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement:-
..
♬
14
This invention relates to apparatus for heating water or for generating and
superheating steam.
W
According to my invention I employ one or more: series or nests of-tubes which
are curved or bent into a form somewhat resembling the letter V-but with-the
angle curved to an approximately semi-circular shape. These tubes--are pre-
ferably arranged in a vertical plane, that is to say with one member or leg above
the other, the upper member being horizontal or nearly so. Both ends of every
tube of each series or nest open into a vertical tube or chamber, which serves.
both as a header or down tube, and as a water chamber or steam box according
as the apparatus is used as a water heater a steam generator or superheater..>>> The
various vertical tubes or chambers aforesaid are placed--in- communication with
each other by pipes and, in a steam-generator or superheater, by-a-drum or drums
disposed above the water level. Suitable valves-may be 'arranged in connection
with these pipes whereby any section (by. which term I mean the vertical tube,
chamber or header and the series or nest of curved tubes connected therewith)
can be disconnected from the others or from the drum or drums or main outlet
common to all..
* 3
1
The various sections are arranged in an enclosing chamber which is heated-
by a suitable furnace or furnaces, the said sections being, if desired separated
from one another by partitions so arranged as to cause the products of combus-
tion to pass over or around the tubes in any required manner before reaching
the main flue. Abaffle plate or baffle plates may also, if desired; be employed to
cause the products of combustion to travel in a curved path coinciding with the
curvature or shape of-the-tubes.
2.
I sometimes arrange-two or more sections, in one furnace chamber, the, vertical
tubes or headers of the sections being disposed alternately at opposite ends,!so
that the curved tubes lie with one series adjacent to another and with their
curved ends projecting in opposite directions. In a combined steam generator
and superheater thus arranged, I separate the superheating sections from the
steam generating sections by a partition, wall or plate. The flues are arranged
to conduct the hot conibustion gases of the furnace or furnaces downwards between
the curved tubes of the superheating portion of the apparatus to the main flue
leading to the chimney, and in the event of there being more than one section in
the superheating portion, the combustion gases may be conducted up and down
in'a circuitous course through the superheating portion, as said gases pass on their
way to the chimney.
1
2
- sometimes use a water heating section or sections between the superheating
section or sections and the chimney, for heating the feed-water by the combustion
gases as they pass from the other sections or portion of the apparatus. and thus
effect economy by utilizing the heat of the combustion gases.
سقوط
In order that my said invention may be clearly understood and readily carried
into effect I will describe the same more fully with reference to the accompany-
inos drawings in which:-

page_text: Figure 1 is a vertical section of an apparatus constructed in accordance with
my invention and intended for generating and superheating steam.
Figure 2 is a horizontal section of the same taken approximately on the
line 11. of Figure 1.
AA are the various nests or series of curved tubes. B, B are the vertical
chambers or headers with which these tubes communicate, each series having: a
separate chamber. C is the brickwork structure enclosing said tubes and
DD are the furnaces located at the lower part of said structure. In the example
illustrated the aforesaid vertical chambers B are arranged alternately at opposite
ends of the structure so that the bent or curved portions of the said tubes project
in opposite directions.
E is the partition, wall or plate by which the superheating portion of the
apparatus is separated from the steam generating portion. A door (not shewn
in the drawings) is provided for enabling access to be had to the apparatus for
clearing out the dust carried over by the combustion gases as they pass from the
steam generating portion of the apparatus into the superheating portion..
GG are the steam drums which are disposed above the structure and con-
nected together by a pipe g. These drums are connected by means of pipes g¹ gl
to the various vertical chambers B of the steam generating portion of the
apparatus and by pipes g² g² to the vertical chambers of the superheating por-
tion. H H are the outlets from the superheating portion of the apparatus,
through which the superheated steam passes to the main steam supply pipe.
Each section of the steam generating portion of the apparatus is preferably pro-
vided with a water gauge; a steam gauge is also connected with the drums G.
II are the furnace doors and J J the ash pit doors.
The upper parts of the vertical chambers B are provided with depending
tubes which extend almost to the bottom of said chambers and communicate
at their upper ends with the drums G by pipes 1, so that the condensed steam
in the said drums can thus be conveyed back to the chambers B. K K are feed
pipes which are connected with the lower end of the chambers B by means of
cross-connections kk furnished with valves which enable any section of
the apparatus to be isolated from the others when desired. These pipes K also
serve for blowing off the various sections when required. If desired valves may
be arranged on the pipes g¹² for enabling any of the sections to be isolated
from the drums G.
The products of combustion pass from the furnaces D upward and heat the
various tubes of the steam generating portion of the apparatus; they then pass
over the partition E thereby reaching the superheating portion of the apparatus,
down which they pass and after parting with most of their heat to the super-
heating tubes and the feed-water heating tubes (if the latter be employed) leave
the apparatus by a flue, leading to the chimney as already stated.
It will of course be understood that my apparatus, although illustrated in a
form suitable for the generation and superheating of steam, may be constructed
without the superheating and the feed-water heating portion and can be employed
either as a steam generator or as a water heater, the steam or hot water being
utilized for any purpose that may be required of it. When the apparatus is
used as a water heater the drums G and superheaters would be omitted.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
1. In apparatus of the kind stated, a nest or series of curved tubes connected
with vertical chambers or headers and formed and arranged relatively to each
other substantially as and for the purposes described.
2. The combination with two or more series of the aforesaid curved tubes, of
vertical chambers or headers located alternately at opposite ends of the structure
substantially as described.

page_text: 3. The combination with the said curved tubes and the vertical chambers or
headers, of feed-water or blow-off pipes provided with valves for enabling any of
the sections to be disconnected with said pipes substantially as and for the pur-
pose described.
4. The combination with the aforesaid curved tubes and their vertical chambers
or headers, of a drum or drums connected with the said vertical chambers by pipes
which may be furnished with valves substantially as and for the purpose described.
5. The combination with two or more series of the aforesaid curved tubes and
their vertical chambers or headers, of a steam superheating or a water heating
section or sections, comprising curved tubes and vertical chambers, situated in
the path followed by the combustion gases substantially as and for the purpose
specified.
6. A steam generator and superheater having its parts constructed and arranged
substantially as described with reference to the accompanying drawings for the
purpose specified.
1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.