Improvements in or Additions to the Pipes or Tubes of Fuel Economisers, Steam Boilers, Exhaust Feed Water Heaters, Steam Superheaters, and the like.
Year: 1894

page_text: Date of Application, 24th Dec., 1894
Complete Specification Left, 24th Sept., 1895-Accepted, 26th Oct., 1895
PROVISIONAL SPECIFICATION.
Improvements in or Additions to the Pipes or Tubes of Fuel
Economisers, Steam Boilers, Exhaust Feed Water Heaters, Steam
Superheaters, and the like.
I FRANCIS WILLIAM GREEN of the firm Edward Green & Son Limited,
2 Exchange Street, Manchester, Lancashire, Fuel Economiser Manufacturers do
hereby declare the nature of this invention to be as follows
This invention relates to certain improvements in or additions to the pipes or
tubes of fuel economisers steam boilers, exhaust feed water heaters, steam super-
heaters and the like and consists of an additional pipe arranged in the ordinary
tube or pipe of a fuel economiser or other apparatus the inner pipe having its
lower end open where passing through the bottom box in which it is fitted so as
to admit of the entrance of the heated gases from the flue, the upper end of the
pipe being blind and held in position if required by one or more radial arms or
Cross bars. The water in the economiser pipe will thus occupy an annular space
and be heated by the action of the gases on the outside of the larger pipe as well
as by the gases on the inside of the smaller internal pipe, and the bottom box can
be made in any suitable manner either by means of a screwed joint, a flange or by
a turned and bored joint.
By this arrangement the heating surface of the economiser can be materially
increased without increasing the space occupied by the apparatus.
If requned the lower end of the internal pipe can be made a taper so as not to
interfere unnecessarily with the throatway of the bottom box. Further the
internal pipes might be so arranged as to pass upwards through the top box and
thus give a continuous thoroughfare in the internal pipe from end to end instead of
being blind at the upper end as above stated.
The gases flowing through the internal pipe in this modification would then pass
in at the bottom and out at the top and the arrangement might be so made as to
permit of a series of these various internal pipes being connected together by
bends at the top and bottom so that the stream of hot gases would flow up
through one economiser pipe, down through the next, up the following and so on
in series.
This continuous flow arrangement might be devised so as to cause
the stream of gases to pass either through cach individual pipe or the internal
pipes may be coupled together so that the stream of gases flowing through the
internal pipes would flow through the various sections or groups in succession,
that is to say, the gases might rise through the whole of the pipes in one section
The
and then descend through the whole of the pipes in the next section.
flow of gases in the pipes of one section thus being taken collectively instead of
individually.
The connection of the pipes at the upper and lower ends could be made in a
variety of ways to suit the convenience of construction.
The invention is described as being applied to a fuel economisers but it is
equally applicable to steam boilers, exhaust feed water heaters, steam superheaters
and the like.
וד
.
L
1004

page_text: Improvements in or Additions to the Pipes or Tubes of Fuel
Economisers, Steam Boilers, Exhaust Feed Water Heaters, Steam
Superheaters, and the like.
I, FRANCIS WILLIAM GREEN, of the firm Edward Green and Son, Limited,
2 Exchange Street, Manchester, Lancashire, Fuel Economiser Manufacturers, 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.
This invention relates to certain improvements in or additions to the pipes or
tubes A (shown in the annexed drawings) of fuel economisers, steam boilers,
exhaust feed water heaters, steam superheaters, and the like, and cousists of an
additional pipe B arranged in the ordinary tube or pipe A of a fuel economiser or
other apparatus, the miner pipe B having its lower end C open where passing into
the bottom box D in which it is fitted so as to admit of the entrance of the heated
gases from the flue, the upper end of the pipe B being blind and held in position
if required by one or more radial arms of cross bars F, F. The water in the
economise pipe A will thus occupy an aunula space G and be heated by the
action of the gases on the outside of the larger pipe A as well as by the gases on
the inside of the smaller internal pipe B The joint between the internal pipe B
and the bottom box D cau be made in any suitable manuer either by means of a
screwed joint, a flange, or by a turned and bored joint.
By this arrangement, the heating surface of the economiser can be materially
increased without increasing the space occupied by the apparatus
If required the lower end of the internal pipe B may be parallel and tapered to
fit, as at Figure 1, or the pipe B may be of tapered form for a portion of its length,
as at Figure 2, so as not to inter fere unnecessarily with the throat way of the
bottom box D. Further the internal pipes B might be so arranged as to pass
upwards through the top box H as at Figmes 3 and 4 and thus give a continuous
thoroughfare in the internal pipe 13 from end to end instead of being blind at the
upper end as above stated.
The gases flowing through the internal pipe B in this modification would then
pass in at the bottom and out at the top, and the arrangement might be so made
as to permit of a series of these various internal pipes being connected together
by bends at the top and bottom so that the stream of hot gases would flow up
though one economiser pipe, down through the next, up the following, and so on
in series.
This continuous flow arrangement might be devised so as to cause the stream
of gases to pass either through cach individual pipe, or the internal pipes may be
coupled together so that the sticam of gases flowing through the internal pipes
would flow through the various sections or groups in succession, that is to say, the
gases might rise through the whole of the pipes in one section and then descend
through the whole of the pipes in the next section. The flow of gases in the pipes
of one section thus being taken collectively instead of individually.
Thus will be best understood by reference to Figure 5, which may be taken to
represent 1oughly the plan of the pipes of an economiser.
Referring to the circulating arrangement just described, the internal stream of
gases might be made to flow in succession through the pipes a' a' a³ etc.,
or etc, and so on in each individual section, or the circulation might be
aanged so that the stream of gases asconded all the pipes in the section marked a
and then descended through all the pipes in the section marked b and afterwards
ascending through those marked o, and so on through the whole group.

page_text: The connection of the pipes at the upper and lower ends could be made in a
variety of ways to suit the convenience of construction.
The invention is described as being applied to a fuel economiser but it is
equally applicable to steam boilers, exhaust feed water heaters, steam superheaters,
and the like.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what 1
claim is .-
The combination of an external pipe and internal pipe secured to bottom box
of a fuel economiser, steam boiler, exhaust feed water heater, steam superheator,
and the like, said internal pipe having an open bottom and secured to lower part
or base of a lower box and having the upper part of said internal pipo closed or
blind, as and for the purposes set forth, the coustiuction on combination being
substantially as represcuted by the annexed diawings.
TL 4 1
Gautamba 1905
R. CORE GARDNER,
Patent Agent, 166 Fleet Street, London,
Agent for the said Francis William Green.
R. CORE GARDNER,
Patent Agent, 166 Fleet Street, London,
Agent for the said Francis William Green.