U.S. patent application number 14/362878 was filed with the patent office on 2014-10-16 for method and device for charging coke ovens with compacted coal by use of a charging plate separator layer.
This patent application is currently assigned to ThyssenKrupp Industrial Solutions AG. The applicant listed for this patent is Sven Badura, Ronald Kim, Franz-Josef Schucker, Rainer Worberg. Invention is credited to Sven Badura, Ronald Kim, Franz-Josef Schucker, Rainer Worberg.
Application Number | 20140305785 14/362878 |
Document ID | / |
Family ID | 47278748 |
Filed Date | 2014-10-16 |
United States Patent
Application |
20140305785 |
Kind Code |
A1 |
Schucker; Franz-Josef ; et
al. |
October 16, 2014 |
METHOD AND DEVICE FOR CHARGING COKE OVENS WITH COMPACTED COAL BY
USE OF A CHARGING PLATE SEPARATOR LAYER
Abstract
Disclosed is a method and device for charging the chambers of a
coke oven with compacted coal. The method includes placing a
plurality of adhesion reduction particles onto a coke oven charging
plate, the particles being configured to reduce at least one of
adhesion forces and friction forces present between the charging
plate and compacted coal to be loaded thereon, loading compacted
coal onto the charging plate, moving the charging plate loaded with
compacted coal to the coke oven chamber, and slidably removing the
compacted coal from the charging plate such that the compacted coal
is disposed in the coke oven chamber. The device comprises a metal
plate configured to load compacted coal into the coke oven, a
plurality of adhesion reduction particles affixed to the metal
plate by an adhesive layer, and a device used to move the metal
plate to a front of the firing chamber of the coke oven.
Inventors: |
Schucker; Franz-Josef;
(Mulheim an der Ruhr, DE) ; Worberg; Rainer;
(Bottrop, DE) ; Kim; Ronald; (Essen, DE) ;
Badura; Sven; (Bottrop, DE) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Schucker; Franz-Josef
Worberg; Rainer
Kim; Ronald
Badura; Sven |
Mulheim an der Ruhr
Bottrop
Essen
Bottrop |
|
DE
DE
DE
DE |
|
|
Assignee: |
ThyssenKrupp Industrial Solutions
AG
Essen
DE
|
Family ID: |
47278748 |
Appl. No.: |
14/362878 |
Filed: |
November 13, 2012 |
PCT Filed: |
November 13, 2012 |
PCT NO: |
PCT/EP2012/004714 |
371 Date: |
June 4, 2014 |
Current U.S.
Class: |
201/6 ; 201/40;
202/262 |
Current CPC
Class: |
C10B 45/02 20130101;
C10B 31/10 20130101 |
Class at
Publication: |
201/6 ; 201/40;
202/262 |
International
Class: |
C10B 31/10 20060101
C10B031/10 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 8, 2011 |
DE |
10 2011 120 489.3 |
Claims
1.-9. (canceled)
10. A method for charging the chambers of a coke oven with
compacted coal, comprising: placing a plurality of adhesion
reduction particles onto a coke oven charging plate configured to
charge the coke oven with compacted coal, the adhesion reduction
particles being configured to form a separating layer between the
charging plate and the compacted coal to be disposed thereon so as
to reduce at least one of adhesion forces and friction forces
present between the charging plate and compacted coal, so as to
reduce the force required to slidably remove the compacted coal
from the charging plate; loading compacted coal onto the charging
plate, the compacted coal having the form of at least one of (1) a
plurality of stacked compressed blocks of coal or (2) a compressed
coal cake; moving the charging plate loaded with compacted coal to
the coke oven chamber; and slidably removing the compacted coal
from the charging plate such that the compacted coal is disposed in
the coke oven chamber.
11. The method of claim 10, further comprising: compression molding
coal directly on the charging plate to form compacted coal;
12. The method of claim 10, wherein said slidably removing the
compacted coal from the charging plate is accomplished by at least
one of pushing the compacted coal off of the charging plate and
into the coke oven chamber, or pulling the charging plate laterally
out from under the compacted coal disposed within the coke oven
chamber.
13. The method of claim 10, wherein the plurality of adhesion
reduction particles are sand.
14. The method of claim 10, wherein the plurality of adhesion
reduction particles are fine coke.
15. The method of claim 10, wherein the plurality of adhesion
reduction particles are ash.
16. The method of claim 10, wherein the plurality of adhesion
reduction particles include at least one of sand, fine coke, and
ash.
17. The method of claim 10, wherein the plurality of adhesion
reduction particles are scattered across an upper surface of the
charging plate.
18. The method of claim 10, wherein the plurality of adhesion
reduction particles are affixed to the charging plate by means of
an adhesive layer.
19. A charging plate for loading a firing chamber of a coke oven
with compacted coal, comprising: a metal plate configured to load
compacted coal into the firing chamber of the coke oven; a
plurality of adhesion reduction particles affixed to said metal
plate by an adhesive layer, said particles being configured to
reduce adhesion forces between said metal plate and compacted coal
to be disposed thereon; and a device used to move the metal plate
along a front of the firing chamber of the coke oven.
20. The charging plate of claim 19, wherein said plurality of
adhesion reduction particles are fine coke, and the adhesive layer
is tar.
Description
[0001] The invention relates to a method for charging coke-oven
chambers of the heat-recovery or non-recovery type, by which
coke-oven chambers are loaded by means of a charging plate which is
moved towards the coke-oven chambers for charging them, and the
charging plate is provided with stacked compressed blocks of coal
or with a ready compressed coal cake before charging the coke-oven
chambers and moved towards the coke-oven chambers for charging, and
the coke-oven chambers are loaded by pulling the charging plate out
of the coke-oven chamber at the front or by means of a pusher head,
with the charging plate being provided with a layer of particles
before being loaded with coal to reduce the adhesive forces so that
the compressed coal cake or the coal compacts do not adhere on the
charging plate. The invention further relates to a device
comprising a charging plate which is provided with an adhesive
layer of particles reducing the adhesive forces.
[0002] Coke ovens of the heat-recovery or non-recovery type
carbonise the coal in coke-oven chambers which have a gas space
above the coal cake depending on the load, this space being
referred to as primary heating space into which the coking gases
escape and where they are partially combusted. Examples of coke
ovens of this type are described in patent specifications U.S. Pat.
No. 4,344,820A, U.S. Pat. No. 4,287,024A, U.S. Pat. No. 5,114,542A,
GB1555400A or CA2052177C. The partially combusted coking gas is
then passed into so-called secondary heating spaces which are
located below the coke-oven chambers and in which the partially
combusted coking gas from the primary heating space is combusted
completely. These consecutive combustion steps serve to heat the
coal cake evenly from the top and from the bottom during the coking
process.
[0003] Coke-oven chambers which are not of the heat-recovery or
non-recovery type collect the coking gas for subsequent processing
and use a foreign gas for heating. Such coke ovens are called
conventional coke-oven chambers. Coke ovens of this kind are
described, for example, in patent specification U.S. Pat. No.
3,972,780A. The dimensions of coke ovens of the heat-recovery or
non-recovery type are different from conventional coke-oven
chambers as a result of the aforementioned method of consecutive
combustion steps. For this purpose, coke-oven chambers of the
heat-recovery or non-recovery type are normally loaded through the
coke-oven chambers at the front prior to the coking operation.
[0004] To simplify and rationalise charging of the coke-oven
chambers, there are state-of-the-art methods according to which the
coal is compressed to compacts prior to loading, these ready
compacts then being loaded into the coke-oven chambers. A related
exemplary embodiment is described in DE415846C or DE102009012453A1.
Another possibility is to provide a compressed coal cake which is
of about the same dimensions as the coke-oven chamber to be loaded
and to load it into the coke-oven chamber, It is also possible to
compress the coal to compacts directly on a charging plate and to
implement loading straight from the charging plate. A related
exemplary embodiment is described in WO2011057721A2.
[0005] After the compressed coal cake or the coal compacts have
been provided, actual charging of the coke-oven chamber is
implemented. DE 19545736 A1 describes a method for charging a coke
oven which is bottom-heated and provided with low charging height
and large oven sole area, with the coal being loaded into the
coke-oven chamber in horizontal direction and a compressed coal
cake being pushed into the oven chamber on the base plate of a
charging car and the base plate being pulled out of the coke-oven
chamber while holding on to the coal cake at the front end. In this
way the coke-oven chamber is loaded with a compressed coal cake.
The base plate of such a charging car is also referred to as
charging plate as it is used to bear the readily compacted
compressed coal cake prior to loading.
[0006] Loading involves the problem that it is required to park the
charging car in the vicinity of the coke-oven chambers for extended
periods of time. As a result, the car heats up. In the course of
the charging process, the charging plate usually also rests fully
upon the hot coke-oven sole to the effect that it heats up even
further. As a result, the boundary layer of the coal load on the
charging plate adopts the temperature of the latter. This will make
the tarry coking products degas, leading to the formation of an
adhesion layer between the charging plate and the compressed coal
cake. This layer makes the coal cake or the ready coal compacts
adhere on the charging plate, which is not desired in view of
subsequent processing and loading.
[0007] The formation of an adhesion layer will strongly intensify
the friction between coal cake and charging plate, causing
deformation of the coal cake resting on the charging plate when the
latter is pulled out. This may, for example, make the side edges of
the coal cake break off when the coal cake is charged into the
coke-oven chambers so that not insignificant parts of the coal cake
fall off the charging plate. This involves an undesired loss of
coal during the loading process. It may also happen that parts of
the coal cake broken off the side edges pile up in the loading
process, leading to uneven loading of the coal cake into the
coke-oven chambers. This will as a consequence reduce the
performance of the coke-oven chamber concerned.
[0008] It is therefore the aim to provide a method to prevent or at
least lessen the formation of an adhesion layer between the
coke-oven chamber and the charging plate so to prevent undesirable
breaking off of parts of the coal cake when the coal cake is being
loaded.
[0009] The invention achieves this aim by putting particles on the
charging plate, these particles being applied prior to placing the
coal cake on the charging plate so that these form a separating
layer between coal cake and charging plate. The charging plate may
either be part of a coal charging machine or a separate plate used
to bear a coal cake. The particles are temperature-resistant fines
which are resistant to high temperatures in the environment of
coke-oven chambers and are of no or only very little effect on the
carbonisation of the coal cake.
[0010] Claim is especially laid on a method for charging coke-oven
chambers of the heat-recovery or non-recovery type with compacted
coal on a charging-plate separating layer, by which [0011] the coal
is provided in compacted form as stacked compressed blocks or as a
compressed coal cake, and [0012] the coal is loaded in this
compacted form onto a charging plate which is used for approaching
the coke-oven chamber to be charged and from which, after having
approached the coke-oven chamber, the compacted coal is pushed into
the coke-oven chamber, or [0013] a charging plate with suitable
compressing and enclosing devices is provided with coal so to form
a compression mould, from which one or more compressed coal cakes
are made available by compression on the charging plate, and the
latter being pushed into the coke-oven chamber upon entry,
[0014] and which is characterised in that [0015] particles are
scattered over the charging plate before loading it with coal, the
particles achieving a reduction of the adhesive forces between coal
cake and charging plate.
[0016] Loading itself may, for example, be carried out by pulling
the charging plate with the coal compacts or the compressed cake
out of the coke-oven chamber at the front, it may also be done by a
pusher head, for example. Loading itself may also be carried out by
entry of the charging plate into the coke-oven chamber to be
charged, and from which the compacted coal can be pushed into the
coke-oven chamber after having approached the coke-oven chamber
with the charging plate, and the charging plate is pulled out of
the coke-oven chamber.
[0017] In an embodiment of the invention, the particles are sand.
The latter is adequately stable towards the temperatures to be
expected of the charging plate and reduces the adhesion between the
coal cake and the charging plate to a sufficient degree. In another
embodiment, fine coke is used as particles. It may be produced in
any way desired. In a further embodiment, the particles are ash.
The ash may also be produced in any way desired. All particles can
be of any grain size or grain size distribution.
[0018] In a further embodiment, the particles are mixed from the
components sand, fine coke, or ash or at least from two of these
components.
[0019] The particles are put on the charging plate in any way
desired. In a simple embodiment of the invention, they are
scattered over the charging plate. The particles can be scattered
over the charging plate immediately before use but can also be
scattered over the plate and then kept ready until use in a safe
place of the coke-oven battery. The particles may also be fixed on
the charging plate. This can, for example, be implemented by an
adhesive layer. The latter can, for example, be made of tar which
is mixed in an adequate amount with the particles, after which the
mixture obtained is spread onto the charging plate.
[0020] Claim is also laid on a metal plate as charging plate for
loading coke-oven chambers with a compressed coal cake or with coal
compacts, comprising [0021] a metal plate used to load the
compressed coal cake or the coal compacts, and [0022] a device used
to move or transport the metal plate along the coke-oven chamber
front,
[0023] and which is characterised in that [0024] the metal plate is
provided with particles via an adhesive layer, which have the
effect of reducing the adhesive forces.
[0025] For the formation of this separating layer, it is possible
to use any type of particles. These particles can be sand, for
example. They can also be fine coke or ash or a mixture thereof. In
an embodiment of the coated metal plate, the particles are fine
coke and the adhesive layer is tar. The metal plate may be
available as such but it may also be part of a charging machine.
This metal plate may be made available immediately before the
loading process but it may also be prepared and stored until being
used.
[0026] The invention is used for loading coke ovens of the
heat-recovery or non-recovery type. However, it may also be used
for any other type of coke ovens, provided these are suited by
their dimensions for being loaded with a compressed coal cake or
with coal compacts.
[0027] The invention involves the advantage of preventing coal to
be carbonised from adhering to the charging plate of a charging
machine for coke ovens. This allows proper loading of coke-oven
chambers ensuring that no component parts of the coal cake break
off or pile up unwantedly.
* * * * *