An Improved System of Utilising the Heated Gases from Refuse Destructor Furnaces.
Year: 1893

page_text: Date of Application, 30th Mar., 1893
Complete Specification Left, 2nd Aug., 1893-Accepted, 2nd Sept., 1893
PROVISIONAL SPECIFICATION.
An Improved System of Utilising the Heated Gases from Refuse
Destructor Furnaces.
I, BRIERLEY DENHAM HEALEY of Higher Walton, Preston in the County of
Lancaster, Civil Engineer do hereby declare the nature of this invention to be as
follows:-
This invention comprises the setting of duplicate steam generators in combination
with a byepass flue dust chamber and a cremator for bulky matters or unsound
meat.
As the heated gases pass from the main flue towards the chimney they may first
enter a cremator which has both upper and side doors, into which mattresses books
waste paper and unsound meat or carcases, may be put to be burnt or destroyed.
On leaving the cremator the heat passes either directly through the byepass flue
or dust chamber to the chimney or partly through that passage and partly through
the steam generators which are set at each side of the byepass flue.
This arrangement is provided with flue dampers for the purpose of directing the
currents of beated gases, and two or more cleaning doorways for access to the tubes
of the steam generators when they require sweeping.
This method of duplicate setting of steam generators, ensures a large additional
sectional area of the combined flues, and results in more power being generated,
although the tube surface is only slightly increased.
Dated this 29th day of March 1893.
B. D. HEALEY,
Applicant.
COMPLETE SPECIFICATION.
An Improved System of Utilising the Heated Gases from Refuse
Destructor Furnaces.
I, BRIERLEY DEnham Healey of Higher Walton, Preston, in the County of
Lancaster, Civil Engineer do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :-
This invention comprises the setting of duplicate steam generators in combination
with a byepass flue dust chamber and a cremator for bulky matters or unsound
meat.
As the heated gases pass from the main flue towards the chimney they first enter
a cremator which has both upper and side doors, into which mattresses books waste
paper and unsound meat or carcases, may be put to be burnt or destroyed.
On leaving the cremator the heat passes either directly through the byepass flue
or dust chamber to the chimney, or partly through that passage and partly through
the steam generators which are set at each side of the byepass flue.
This arrangement is provided with flue dampers for the purpose of directing the
currents of heated gases, and two or more cleaning doorways for access to the tubes
of the steam generators when they require sweeping.
This method of duplicate setting of steam generators, ensures a large additional
sectional area of the combined flues, and results in more power being generated,
although the tube surface may be only slightly increased.
And in order that this invention may be better understood I have appended two
sheets of drawings.

page_text: Figure is a plan and Figure 2 a transverse section. shewing how two steam
generators may be set for utilising the heat from said furnaces.
Figure 3 is a plan and Figure 4 a transverse section shewing how six steam
generators may be set for utilising the heat from said furnaces.
It is obvious that two, four, six or any greater number of steam generators may
be set on the plan shewn by Figures 3 and 4.
The cremator may not be needed in every application of my system but I have
shewn it as applied on both sheets of drawings.
The steam generators intended to be used are of the multitubular type, but other
forms of generators may be used without departing from the nature of this
invention.
To ensure the heat flowing at a uniform velocity through the different boilers it
is necessary to set them symmetrically as shewn on Figures 1 and 3.
As the heated gases pass from the main flue A towards the chimney, they may
first enter a cremator B for mattresses or other articles which may have to be
burnt. The cremator has doors C at the sides and in the arch or roof, of any well
known form and of suitable size.
On leaving the cremator the heated gases may pass directly through the byepass
flue or dust chamber D to the chimney flue G or partly through the passage D and
partly through the tubes and flues S of the steam generators E. After passing the
steam generators E the gases are conveyed by flues F into the chimney flue G
which leads to the stack or chimney.
The dampers H are opened to allow the heated gases to pass to the steam
generators, and the dampers J are opened to allow the waste gases to pass from
the generators, the dampers K at end of dust chamber or byepass being then
closed.
The dampers L and man holes M are used when cleaning the dust from
flues, and a dust elevator N is provided for lifting the dust from a sunk part of
flue at O.
The steam generators may be cleaned one at a time, closing a pair of dampers H
and J, and opening a pair of doors P, until the operation of cleaning is completed.
The dampers are formed of brick slabs in steel frames and are made to slide in
tapered slots X so that as they approach the lower end of the slots they become
wedged, and yet they may be opened with ease and certainty whenever required.
The flue cleaning doorways P are fitted with frames and doors in which asbestos
cord is inserted into grooved joints, so as to ensure the exclusion of cold air when
the doors are closed.
The floors, main walls, and main arches of the high temperature heat flues and
chambers A B and D), are built with an air space V between the inner and outer
surfaces, thus forming cavity walls, which reduce the loss of heat by radiation to a
minimum.
The inner and outer parts of the vertical cavity walls are tied together by three
or more bricks to each square yard, whilst the horizontal cavity surfaces are formed
by covering slabs or bricks which have small prints on the underside about
two inches long.
Air spaces of the same kind and for the purpose above described may also be
formed in the outer surfaces of the refuse destructor furnaces in which the heat is
generated without departing from the object of this invention.
In some cases I obtain a circulation of air within the said cavities by forming
small inlets in the outer jacketting of walls near the ground line, and a series of
outlets in the upper parts of said cavities. The said outlets from cavities 1 connect
to the air trunk which leads to the suction tube of a Sturtevant or other suitable
blower, which I prefer to use for undergrate pressure blowing in forcing the fires of
my refuse furnaces, and to drive same by self-contained engine or by belting from a
line of shafting.
The said blower is fixed over the furnaces and the blast is conveyed to the
underside of enclosed firegrates, through tubes laid in the division walls of the

page_text: furnaces, which tubes are provided with regulating valves so that several furnaces
may be supplied from one air pressure main.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. The symmetrical system of setting steam generators for utilising the heated
gases from refuse destructor furnaces, substantially as herein shewn and described.
2. The use of air spaces in the outer work or jacketting of such plant for
utilising the heat from destructors, substantially as herein shewn and described.
3. The general arrangement of the dampers cleaning doors and dust chambers,
substantially as herein shewn and described.
4. The use of air exhausting and pressure blowers for the purpose and operating
substantially as herein described.
Dand this tim dow of A1002
B. D. HEALEY,
Applicant.