Improved Apparatus for Catching or Separating the Dust from Blast Furnace and other similar Gas.
Year: 1896

page_text: Date of Application, 1st Aug., 1896
Complete Specification Left, 1st May, 1897-Accepted, 24th July, 1897
PROVISIONAL SPECIFICATION.
Improved Apparatus for Catching or Separating the Dust from
Blast Furnace and other similar Gas.
I, WILLIAM PORRITT INGHAM of Post Office Buildings, Middlesbrough, Yorkshire,
Consulting Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to apparatus for catching the dust from Blast furnace
and other similar gas.
The invention consists of a box or casing made of suitable material and in this
box or casing are placed perforated and or unperforated plates or screens of suitable
material in such a position that when the gas passes through the box or casing it
strikes against the said plates or screens and the dust in the gas falls to the bottom
of the apparatus from which it is removed through a suitable door or doors. To
prevent the dust from depositing on the plates or screens they are moved by any
suitable motive power but preferably by means of "tappit" wheels worked by a
weight and clock escapement and pendulum; by this movement any dust that may
rest on the plates or screens is shaken off and falls to the bottom of the apparatus.
Dated this 31st day of July 1896.
WM. PORRITT INGHAM.
Improved Apparatus for Catching or Separating the Dust, from
Blast Furnace and other similar Gas.
I, WILLIAM PORRITT INGHAM, of Post Office Buildings, Middlesbrough, in the
County of York, Consulting Engineer, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed to be particularly described
and ascertained in and by the following statement :-
My said invention relates to an improved apparatus for catching or separating the
dust from blast furnace and other similar gas.
It is well known, that blast furnace and other similar gas, such as producer gas,
is more or less charged with dust, and this dust renders the gas more or less
unsuitable for some purposes, such for example as heating hot blast stores and
firing boilers, by reason of the dust blocking up the flues and depositing on the
sides of the boilers, or as a motive power for engines, by reason of the cutting action
of the dust, and consequent destruction of the wearing parts.
Now, the object of the present invention is by a simple and inexpensive device to

page_text: Figure 1. is a vertical longitudinal section taken on the line 1-1. of Figure 2.
representing an apparatus constructed according to the present invention.
Figure 2. is a vertical transverse section thereof taken on the line 2-2 of Figure 1.
Figure 3. is a plan thereof.
Figure 4. is a side elevation of a portion of the apparatus representing the motor
for actuating the screens.
Figure 5. is a detail view of the escapement employed in connection therewith.
Figure 6. is a detail view of the tappet wheel and co-acting parts.
In the several figures, in which like parts are indicated by similar letters of
reference, Figures 4, 5, and 6 are drawn to an increased scale with respect to
Figures 1, 2, and 3.
a. represents the separating chamber, which consists of a box or casing provided
at one side with a gas inlet al and at the opposite side with a gas outlet a².
At the lower part thereof the chamber a. is contracted to form a hopper 3 adapted
for the reception and delivery of the collected dust and this hopper 3 is provided
with a door or valve a hinged to the casing at a and furnished with a latch a
hinged to the casing at by means of which it is normally held closed as indicated
in the drawings whilst by withdrawing the latch it may be caused to discharge the
contents of the hopper into a truck or other suitable receptacle.
Within the separating chamber a. and arranged transversely thereof are a number
of plates or screens b. about half the area of each of which is formed with a number

page_text: of holes or perforations & therethrough and the other half is imperforato and may
be corrugated.
These plates b. are so arranged that the imperforate part b. of one plate or screen
is opposite to the perforated part 6 of an adjacent plate or screen and thus the gas
in its passage through the apparatus is caused to follow the direction of the arrows
in Figure 1, that is to say, it is first caused to pass through the perforations 6 of
the first plate, then to strike against the imperforate part b. of the next plate, there
depositing a portion of its dust, it thence passes in a downward path to the perforated
part of such plate through the perforations thereof and strikes against the
imperforate part b. of the next adjacent plate or screen and so on, and by these
means a circuitous passage is provided for the gas and it is caused repeatedly to
pass through the sieve like perforations 6 and to strike against the imperforato
surface b. of the plates or screens and in its passage through the collecting chamber
the suspended particles or dust are thus separated therefrom and the gas issues
from the outlet as of the apparatus comparatively free from dust or solid impurities.
The dust arrested by the plates or screens b. falls to the bottom of the apparatus
into the hopper a whence it may be removed from time to time by opening tho
door or valve a' thereof.
In order to prevent the dust accumulating upon the plates or screens b, the latter
intermittently receive a sudden vertical or shaking movement and for this purpose
the plates or screens b. are fixed to rods b which pass through openings in the
cover and at their upper ends are suspended from a rectangular frame or its
equivalent b having fixed therewith longitudinally thereof a bar b³..
In connection with this bar is employed a tappet whoel el fixed upon a shaft c.
mounted with capability of revolution in bearings c carried by brackets d and the
shaft c. receives a slow rotary motion in the manner hereinafter described and in its
revolution the tappet wheel c' acts upon the bar & to slowly raise the entire series
of plates or screens b. whilst upon the nose of the tappet wheel cl passing beyond
a given point, the bar 6' and consequently the plates or screens b. suddenly descend
with sufficient force to shake off any dust that may have collected thereon, stops d.
being provided to act in conjunction with the bar 6 and thus limit the descent of
the plates or screens b.
In order to prevent the leakage of gas past the lower edges of the screens b,
fixed baffle plates a' are employed located beneath the screens b. and arranged
slightly out of alignment therewith so as to overlap the same and yet permit the
shaking movement thereof.
The necessary rotary motion may be given to the shaft c. in any suitable manner,
but the following means will be found convenient where other power is not
available.
Upon a short shaft e mounted with capability of revolution in bearings carried
by a bracket e fixed with the casing a, is fixed a drum e. upon which is coiled a
wire or other rope e at one end fixed with the drum e. and at the other or free end
fastened to and holding in suspension a weight e.
Upon the shaft el is fixed a toothed wheel e and this toothed wheel e' through a
train of gearing es e³ e e, gives motion through a pinion e fixed thereon to the
shaft c.
In order to control the rotation of the shaft c. a ratchet wheelf is fixed thereon,
and a scape wheel is mounted loosely thereon and the scape wheel is providod with
a spring pawl f which in the direction of motion of the apparatus fixes the scape
wheel fl with the ratchet wheel and consequently with the shaft c.
In connection with the scape wheel ' is employed an anchor / mounted upon a
centre of motion " and controlled by a pendulum f, as will be well understood,
and the speed of the shaft c is by these means effectually controlled whilst if desired
the bulb or disc of the pendulum / may be made adjustable on its rod or spindle
in order to enable the speed of this part of the apparatus to be regulated at will.
The winding up of the apparatus is effected by means of a crank handle e..
fitting upon the shaft or axis of the toothed wheel the ratchet wheel and pawl f

page_text: permitting the necessary reverse motion through the train of wheels to the drum e
independently of the scape wheel f¹.
It will be evident that in lieu of the motor and governor or regulator hereinbefore
described any other suitable means may be employed for effecting the same object.
Instead of perforating the screens b in the manner herein before shown and
described large openings may be formed therein or spaces may be left alternately
above and below the same as will be readily understood.
By the means herein before described, any dust or solid impurities held in suspen-
sion in the gas will be effectually separated therefrom and some or all of the
objections to the use of blast furnace or other gas such as s producer gas for purposes
such as heating hot blast stoves, firing boilers or driving gas engines will be
obviated.
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. An apparatus for separating the dust or solid particles from blast furnace or
other gas such as producer gas comprising a box or chamber provided with inlet
and outlet ports for the gas, a series of transverse plates or screens located between
the ports and perforated over part of their area or open and so arranged that the
perforated part of each plate or the opening is opposed to the imperforate part. of
the next plate and a hopper shaped receptacle at the lower part of the chamber
terminating in a discharge opening closed by a door or valve, substantially as herein
shown and described.
2. An apparatus for separating the dust or solid particles from blast furnace or
other gas, comprising a box or chamber provided with inlet and outlet ports for the
gas, a series of transverse plates or screens located between the ports and perforated
over part of their area or open and so arranged that the perforated part of each
plato or the opening is opposed to the imperforate part of the next plate, means for
reciprocating or shaking the plates and a hopper shaped receptacle at the lower
part of the chamber terminating in a discharge opening closed by a door or valve,
substantially as herein shown and described.
3. An apparatus for separating the dust or solid particles from blast furnace or
other gas, comprising a box or chamber provided with inlet and outlet ports for the
gas, a series of transverse plates or screens located between the ports and perforated
over part of their area or open and so arranged that the perforated part of each
plate or the opening is opposed to the imperforate part of the next plate and a
tappet wheel or its equivalent driven by any suitable means for imparting a vertical
shaking movement to the plates, substantially as herein shown and described.
4. An apparatus for separating the dust or solid particles from blast furnace or
other gas, comprising a box or chamber provided with inlet and outlet ports for the
gas, a series of transverse plates or screens located between the ports and perforated
over part of their area or open and so arranged that the perforated part of each
plate or the opening is opposed to the imperforate part of the next plate, means for
imparting a vertical shaking movement to the plates, a weight and cord for giving
motion through a drum to such means and a clock escapement and pendulum for
controlling the running down of the weight, substantially as herein shown and
described.