Cooling Device for the Discharge Mains or Pipes of Ovens or Gas Producing Apparatus through which the Gases are Led Off for the Condensation of Tar, Ammonia, Benzol, and other Products there- from, and for use as Illuminant, Fuel, and the like.
Year: 1898

page_text: Date of Application, 1st Feb., 1898
Complete Specification Left, 20th Oct., 1898-Accepted, 3rd Dec., 1898
PROVISIONAL SPECIFICATION.
Cooling Device for the Discharge Mains or Pipes of Ovens or Gas
Producing Apparatus through which the Gases are Led Off for the
Condensation of Tar, Ammonia, Benzol, and other Products there-
from, and for use as Illuminant, Fuel, and the like.
I, RUDOLPH BOECKING, of Hallbergerhütte, near Brebach on the Saar, Germany,
Manufacturer, do hereby declare the nature of this invention to be as follows:
With gas discharge pipes and hydraulic mains, such as those of coke ovens, a
considerable disadvantage has hitherto arisen, consisting in that the tar pitch of
high boiling point carried along with the gas is deposited in the upper part of
the rising mains, and in the hydraulic main, causing obstructions.
Attempts to cool the gases by injection of water have not given any satisfac-
tory results.
My invention relates to a cooling device for the gas discharge pipes which have
been proved by experiment to be effectual and reliable in preventing such deposits.
The said device is shown on the accompanying drawing, applied by way of
example to
coke oven.
Fig. 1 shews a part vertical section of the coke oven with two gas discharge pipes
or rising mains. Fig. 2 shows the arrangement of the rising main and its cooling
device to a larger scale.
The lower part of the rising main which is closely attached to the discharge
opening of the oven, is surrounded by a second concentric pipe of considerably
larger diameter and of the same height as the pipe a. The annular space between
the two pipes is closed at bottom by a broad flange projecting from the pipe a
This annular space is filled with water, being preferably so connected to a cold
water supply as to insure a constant renewal of cold water therein. Into the
annular body of water thus formed dips the lower end of the rising main d. The
cooling water cools the rising main d to a considerable extent, and consequently
also the ascending gases. The water can evaporate rapidly on the inner surface
of the rising main, and such vapour is carried off by the gas current. The con-
siderable cooling of the gas current and the saturation thereof with steam effects
the precipitation of the tar-pitch of high boiling point, in the lower parts of the
pipe, so that it cannot form an adhering deposit, but falls back, in great part, into
the oven. By this means no hard distillation products pass into the upper parts
of the pipes, valves, and hydraulic main. Consequently, no obstructions can be
there produced; on the other hand, very soft tar and the strong ammoniacal liquor
produced by the condensation of the aqueous vapour, can readily flow out of the
hydraulic main. The described hydraulic joint and the flange e forming the
bottom of the water receptacle, and secured by means of fire clay on the top of the
oven, effect an air tight and explosion-proof closure of the interior of the oven
against the outer air.
The above described device con be employed with advantage in connection with
all those ovens or other apparatus in which hot gases are led off for the

page_text: densation therefrom of tar, ammonia benzol, such as in gas works, gas producers,
for subsequent use of the gas as illuminating gas or gaseous fuel.
On account of the increase and decrease of temperature of the ovens, the brick-
work thereof is subject to continual expansion and contraction, while the hydraulic
mains and their rising mains, being rigidly fixed in existing constructions, can-
not follow these movements of the brickwork. In consequence hereof leakages
are produced at the joints of the junction of the rising mains with the continu-
ously moving parts of the oven, caused by the cracking of the mortar employed
for making good the joints. The outer air then enters the oven through the said
cracks, whereby the gas is reduced in quality, the drying process is hindered and
the yield in by-products is reduced.
With the above described new construction this disadvantage is entirely
obviated.
The lower part of the rising main on which the water receptacle is situated, is
fixed rigidly to the brickwork of the oven, and is free to participate in the shifting
motion of the latter, as the upper part of the rising main is not directly con-
nected to the lower part, but only dips into the water seal; any leakages such as
are above referred to are consequently entirely avoided with the improved
construction.
The advantages arising from the improved construction are very considerable;
the following are the principal ones.
1. No pitch is deposited in the upper parts of the rising mains, valves, and
hydraulic mains, so that any cleansing of the mains and other parts is rendered
unnecessary.
2. The hydraulic main remains free from pitch, and the soft distillation pro-
ducts run off of themselves.
3. The yield in tar is increased, in particular in summer.
4. The ammoniacal liquor of 070 to 080 Bé condensed in the hydraulie main,
relieves the scrubber to that extent.
5. The losses in gas caused by the present cleansing operations and the
deterioration of gas by the opening of the cleansing doors, are done away with.
6. The hydraulic joint of the cooling device constitutes an airtight and explo-
sion proof closure.
7. The lower part of the rising main can participate in the shifting motion of
the brickwork of the oven, while the upper part remains rigidly fixed, so that
any loosening of the joints at the connection of the rising main with the brick-
work, and consequent leakages, are completely avoided.
Dated this 1st day of February 1898.
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Cooling Device for the Discharge Mains or Pipes of Ovens or Gas
Producing Apparatus through which the Gases are Led Off for the
Condensation of Tar, Ammonia, Benzol, and other Products there-
from, and for use as Illuminant, Fuel, and the like.
I, RUDOLPH BOECKING, of Hallbergerhütte, near Brebach on the Saar, Germany,
Manufacturer, 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:-
With gas discharge pipes and hydraulic mains, such as those of coke ovens, a

page_text: considerable disadvantage has hitherto arisen, consisting in that the tar pitch of
high boiling point carried along with the gas is deposited in the upper part of
the rising mains, and in the hydraulic main, causing obstructions.
Attempts to cool the gases by injection of water have not given any satisfac-
tory results.
My invention relates to a cooling device for the gas discharge pipes which have
been proved by experiment to be effectual and reliable in preventing such deposits.
The said device is shewn on the drawing accompanying my Provisional Specifi-
cation, applied by way of example to a coke oven.
Fig. 1 shews a part vertical section of the coke oven with two gas discharge pipes
or rising mains. Fig. 2 shews the arrangement of the rising main and its cooling
device to a larger scale.
C
The lower part of the rising main which is closely attached to the discharge
opening of the oven, is surrounded by a second concentric pipe of considerably
larger diameter and of the same height as the pipe a. The annular space between
the two pipes is closed at bottom by a broad flange projecting from the pipe a.
This annular space is filled with water, being preferably so connected to a cold
water supply as to insure a constant renewal of cold water therein. Into the
annular body of water thus formed dips the lower end of the rising main d. The
cooling water cools the rising main d to a considerable extent, and consequently
also the ascending gases. The water can evaporate rapidly on the inner surface
of the rising main, and such vapour is carried off by the gas current. The con-
siderable cooling of the gas current and the saturation thereof with steam effects
the precipitation of the tar-pitch of high boiling point, in the lower parts of the
pipe, so that it cannot form an adhering deposit, but falls back, in great part, into
the oven. By this means no hard distillation products pass into the upper parts
of the pipes, valves, and hydraulic main. Consequently, no obstructions can be
there produced; on the other hand, very soft tar and the strong ammoniacal liquor
produced by the condensation of the aqueous vapour, can readily flow out of the
hydraulic main. The described hydraulic joint and the flange e forming the
bottom of the water receptacle, and secured by means of fire clay on the top of the
oven, effect an air tight and explosion-proof closure of the interior of the oven
against the outer air.
The above described device can be employed with advantage in connection with
all those ovens or other apparatus in hot gases are led off for the con-
densation therefrom of tar, ammonia benzol, such as in gas works, gas producers
for subsequent use of the gas as illuminating gas or gaseous fuel.
In existing constructions, on account of the increase and decrease of tempera-
ture of the ovens, the brick work thereof is subject to continual
expansion and contraction, while the hydraulic mains and their
rising mains, being rigidly fixed in existing constructions,
not follow these movements of the brickwork.
call-
In consequence hereof leakages are produced at the joints of the junction of the
rising mains with the continuously moving parts of the oven caused by the crack-
ing of the mortar employed for making good the joints. The outer air then
enters the oven through the said cracks, whereby the gas is reduced in quality.
the drying process is hindered and the yield in by-products is reduced.
With the above described new construction this disadvantage is entirely
obviated.
The lower part of the rising main on which the water receptacle is situated, is
fixed rigidly to the brickwork of the oven, and is free to participate in the shifting
motion of the latter, as the upper part of the rising main is not directly con-
nected to the lower part, but only dips into the water seal; any leakages such as
are above referred to are consequently entirely avoided with the improved
construction.
The advantages arising from the improved construction are very considerable ;
the following are the principal ones.

page_text: 1. No pitch is deposited in the upper parts of the rising mains, valves, and
hydraulic mains, so that any cleansing of the mains and other parts is rendered
unnecessary.
2. The hydraulic main remains free from pitch, and the soft distillation pro-
ducts run off of themselves.
3. The yield in tar is increased, in particular in summer.
4. The ammoniacal liquor of 070 to 08° Bé condensed in the hydraulic main,
relieves the scrubber to that extent.
5. The losses in gas caused by the present cleansing operations and the
deterioration of gas by the opening of the cleansing doors, are done away with.
6. The hydraulic joint of the cooling device constitutes an airtight and explo-
sion proof closure.
7. The lower part of the rising main can participate in the shifting motion of
the brickwork of the oven, while the upper part remains rigidly fixed so that
any loosening of the joints at the connection of the rising main with the brick-
work, and consequent leakages are completely avoided.
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 I
claim is:-
-
1. In coke ovens, gas works, gas producers, and other apparatus from which
hot gases are led off for the condensation of tur, ammonia benzol and other pro-
duels therefrem and for use as illuminants or gas fuel, the provision of a
water receptacle round the lower part of the discharge pipe or rising gas main,
where it is attached to the oven &c,, into the water of which receptacle the separate
upper part of the rising main or discharge pipe dips, so that by the consequent
cooling of the gases a portion of the tar-pitch vapours carried along by the gases
are deposited immediately upon leaving the oven, substantially as described.
2. The combination with the lower part of the rising gas main of coke ovens,
gas retorts or producers and the like, of a water jacket such as b, arranged and
operating substantially as and for the purposes herein described.
Dated this 20th day of October 1898.
ABEL & IMRAY,
Agents for the Applicant.