【DESCRIPTION】
【Invention Title】
APPARATUS FOR MANUFACTURING COAL BRIQUETTE
【Technical Field】
5 The present invention relates to a coal briquette manufacturing
apparatus. More particularly, the present invention relates to a coal briquette
manufacturing apparatus that can minimize attachment of coal when lump coal
is crushed.
【Background Art】
10 In a melting reduction iron-manufacturing method, a reducing furnace
reducing iron ores and a melter-gasifier melting reduced iron ores are used. In
the case of melting iron ores in the melter-gasifier, as a heat source to melt iron
ores, coal briquettes are charged into the melter-gasifier. Here, reduced irons
are melted in the melter-gasifier, transformed to molten iron and slag, and then
15 discharged outside. The coal briquettes charged into the melter-gasifier form a
coal-packed bed. After oxygen is injected through a tuyere installed in the
melter-gasifier, the coal-packed bed is burned to generate combustion gas.
The combustion gas is transformed into reduction gas at a high temperature
while increasing a temperature through the coal-packed bed. The
20 high-temperature reduction gas is discharged outside the melter-gasifier to be
supplied to the reducing furnace as the reducing gas.
Reaction efficiency and heat-transfer efficiency may be increased by
ensuring permeability and flow so that gas and liquid smoothly pass through the
2
melter-gastifier. Thus, the coal briquettes are manufactured in the shape of
predetermined-sized briquettes by mixing coal containing a sufficient amount of
moisture and molasses and then compression-molding the mixture in the
molding device.
5 The molding device is formed of two compression molding rolls provided
in a lower portion thereof and a gravity feeder provided in an upper portion
thereof to feed coal to the molding rolls. Further, the gravity feeder is provided
with a chopper to crush lump coal among coals fed into the gravity feeder.
When the lump coal is provided directly into the gravity feeder, the lump coal is
10 grown to a ball having a large diameter, thereby causing deterioration of quality
of coal briquettes. The chopper has a structure in which a rotation shaft where
a plurality of crushing plates are installed rotates to crush lumped coals.
However, conventionally, coals mixed with moisture and sticky molasses
are used to be attached to a plate in a process of crushing coals. Thus, the
15 chopper cannot properly crush the lumped coals, thereby causing deterioration
of quality of coal briquettes, and when the attachment of the coal is severe, the
process should be stopped, thereby deteriorating productivity.
【DISCLOSURE】
【Technical Problem】
20 The present invention has been made in an effort to provide a coal
briquette manufacturing apparatus that can clearly crush lumped coals.
【Technical Solution】
Further, the present invention provides a coal briquette manufacturing
3
apparatus that can minimize occurrence of attachment of coals when crushing
coals.
A coal briquette manufacturing apparatus according to an exemplary
embodiment of the present invention includes a mixer forming a mixture of
5 powered coal and a binder, a gravity feeder connected to a lower end of the
mixer and feeding the mixture, a molding device connected to a lower end of the
gravity feeder and molding the mixture fed from the gravity feeder, and a crusher
provided in an upper end of the gravity feeder and crushing the mixture flown
into the gravity feeder, wherein the crusher may include rotation rotors rotatably
10 provided in a housing and having crushing plates disposed at a distance from
each other along the shaft direction, a driver rotating the rotation rotors, and a
scraper member provided in the housing and disposed in front surfaces of the
crushing plates to scrape mixtures attached to the crushing plates.
The rotation rotors may include at least two rotation rotors and arranged
15 in parallel with each other in the housing, and crushing plates provided in each of
neighboring rotation rotors may be alternately arranged
The scraper member may include an upper end portion extended toward
the crushing plates and having a groove through which the crushing plate
passes formed at location corresponding to each crushing plate of the rotation
20 rotor and a lower end portion connected to a lower end of the upper end portion
and extended downward while passing through the crushing plates of the
rotation rotor to guide a mixture.
The scraper member formed with a structure in which the upper end
portion located in the crushing plate may be inclined with respect to a rotation
4
direction of the rotation rotor.
The two neighboring rotation rotors may have different rotation
directions.
The two neighboring rotation rotors may have different rotation speed.
5 The coal briquette manufacturing apparatus may further include a
reduction gear provided between the two neighboring rotation rotors and
differentiating relative rotation speed of the two rotation rotors.
Crushing plates provided in one rotation rotor among the two neighboring
rotation rotors may be formed in the shape of a round plate, and crushing plates
10 of the other rotation rotor may have a structure in which a plurality of wings
extended in a radial direction are arranged while respectively having an angle
along a circumference direction.
【Advantageous Effects】
According to the exemplary embodiment of the present invention,
15 attachment of coals in a coal crushing process can be prevented, and lumps of
coal can be surely crushed such that quality of coal briquette can be improved.
Further, as coal attachment can be minimized, the process can be
continued, thereby improving productivity.
【Description of the Drawings】
20 FIG. 1 schematically shows a coal briquette manufacturing apparatus
provided with a crusher according to an exemplary embodiment of the present
invention.
FIG. 2 is a planar cross-sectional view of the crusher of the coal briquette
manufacturing apparatus according to the exemplary embodiment of the present
5
invention.
FIG. 3 and FIG. 4 are cross-sectional side views of the crusher of the
coal briquette manufacturing apparatus according to the exemplary embodiment
of the present invention.
5 FIG. 5 schematically illustrates a scraper structure in the crusher of the
coal briquette manufacturing apparatus according to the exemplary embodiment
of the present invention.
【Mode for Invention】
The present invention will be described more fully hereinafter with
10 reference to the accompanying drawings, in which exemplary embodiments of
the invention are shown. Unless it is mentioned otherwise, all terms including
technical terms and scientific terms used herein have the same meaning as the
meaning generally understood by a person with ordinary skill in the art to which
the present invention belongs. Like reference numerals are used for like
15 components in the drawings.
The technical terms used in the present invention are only for describing
a special exemplary embodiment, but it is considered that the present invention
is not limited thereto. The singular forms used in the present invention include
plural forms as long as the phrases do not clearly have a contrary sense. The
20 meaning of "including" used in the specification specifies a specific characteristic,
area, integer, step, action, element, and/or component, but it is not considered to
eliminate the existence or addition of other characteristics, areas, integers, steps,
actions, elements, and/or components.
Unless otherwise defined, all the terms including technical terms and
6
scientific terms have the same meanings as those generally understood by a
person skilled in the art of the present invention. The terms that are defined in
a dictionary and are generally used are not to be interpreted with idealized
meanings or overly formal meanings unless the terms are further interpreted and
5 defined to have the meanings corresponding to the related technique documents
and the content disclosed now.
FIG. 1 schematically illustrates a coal briquette manufacturing apparatus
according to an exemplary embodiment of the present invention.
A coal briquette manufacturing apparatus 100 of FIG. 1 is an example of
10 the present invention, and the present invention is not limited thereto. Thus, a
structure of the coal briquette manufacturing apparatus 100 can be variously
modified.
As shown in FIG. 1, the coal briquette manufacturing apparatus 100
includes a mixer 110 mixing powered coal and a binder, a molding device 120
15 manufacturing briquettes by compression-molding the mixture of the coal and
the binder, and a gravity feeder 130 feeding the mixture to the molding device
120. As necessary, the coal briquette manufacturing apparatus 100 may
further include other constituent elements, for example, at least one of kneaders
140 connected to a rear end of the mixer 110 and kneading the mixture and a
20 transfer screw 150 that transfers a mixture discharged from the kneader 140.
The transfer screw 150 that transfers the mixture discharged from the
mixture 110 is provided in an upper end of the gravity feeder 130, and a crusher
10 that crushes a lump of coal included in the mixture fed to the gravity feeder
130 is provided between the transfer screw 150 and an upper end of the gravity
7
feeder 130.
The crusher 10 crushes a lump of coal of which the size of greater than
or equal to a predetermine size.
FIG. 2 to FIG. 4 exemplarily illustrate a structure of the crusher 10
5 according to the present exemplary embodiment.
In the present exemplary embodiment, the crusher 10 includes rotation
rotors 20 and 21 rotatably provided in a housing 12 and where crushing plates
22 and 23 are provided with a gap therebetween along a shaft direction, a driver
that drives the rotation rotors 20 ad 21, and a scraper member 40 provided in the
10 housing 12 and disposed in the entire surfaces of crushing plates 22 and 23 so
as to scrape the mixture attached to the crushing plates 22 and 23.
Thus, the mixture attached to the crushing plates 22 and 23 of the
rotation rotors 20 and 21 is continuously removed by the scraper member 40
and thus the crushing plates 22 and 23 can be maintained in a clean state, and
15 accordingly, crushing of lumps of coal can be continuously performed without
stopping the operation. In the following description, the mixture implies viscid
coal mixed with a binder.
The housing 12 forms an outer shape of the crusher 10, and an opening
and closing door 14 is provided in the side surface of the crusher 10 to check the
20 inside thereof. The housing 12 is formed in the shape of a quadrangular
container into which the mixture moves, and an upper end and a lower end of
the housing 12 are respectively connected to an outlet of the transfer screw 150
and an upper end inlet of the gravity feeder 130.
The rotation rotors 20 and 21 are rotatable provided in a horizontal
8
direction in the housing 12. In the rotation rotors 20 and 21, a plurality of
crushing plates 22 and 23 are respectively provided at a distance from each
other along the shaft direction. The shafts of the rotation rotors 20 and 21 are
rotatably supported by bearing blocks 24 provided in the housing 12. The
5 driver may include a driving motor 30, a driving wheel 32 provided in the driving
shaft, a driven wheel 34 provided in the shaft of the rotation rotor 20, and a belt
36 connected to the driving wheel 32 and the driven wheel 34. Thus, when the
driving motor 30 operates, power is transferred to the rotation rotor 20 through
the driving wheel 32, the belt 36, and the driven wheel 34 such that the rotation
10 rotor 20 rotates.
In the present exemplary embodiment, two rotation rotors 20 and 21 are
provided and disposed in parallel with each other in the housing 12. In addition,
the crushing plates 22 and 23 provided in the respective rotation rotors 20 and
21 are alternately arranged between the neighboring rotation rotors 20 and 21.
15 The alternate arrangement implies that crushing plates 22 and 23 provided in
rotation rotors 20 and 21 overlap crushing plates 22 and 23 of other rotation
rotors 20 and 21 that neighbor between the crushing plates 22 and 23 such that
the crushing plates 22 and 23 are alternately arranged.
The crushing plates 22 and 23 may have a thickness that is smaller than
20 a gap between crushing plates 22 and 23 and other crushing plates 22 and 23
that are engaged with each other such that the crushing plates 22 and 23 can
respectively rotate between the respectively engaged crushing plates 22 and 23.
Thus, when two rotation rotors 20 and 21 rotate, crushing plates 22 and 23
provided in each rotation rotor 20 and 21 scrape mixtures attached to
9
neighboring crushing plates 22 and 23 while passing therebetween such that the
mixtures can be prevented from being attached to the crushing plates 22 and 23.
One rotation rotor 20 among the two rotation rotors 20 and 21 is
connected with the driver. The other rotation rotor 21 receives power from the
5 rotation rotor 20 and rotates. Accordingly, the crushing plates 22 and 23
provided in the rotation rotors 20 and 21 rotate and thus lumped coals included
in the mixture are crushed. The scraping member 40 separates the viscid
mixture attached to the entire surfaces of the crushing plates 22 and 23 by
scraping the same, and this will be described in detail later.
10 The two rotation rotors 20 and 21 have different rotation directions.
That is, as shown in FIG. 3, the respective rotation rotors disposed in the left and
right sides of the drawing respectively rotate in the clockwise direction and the
counterclockwise direction. The mixture charged into the housing 12 are
passed through between the rotation rotors 20 and 21 by the two rotating
15 rotation rotors 20 and 21 and then moved downward. In such a process, the
lumped coals included in the mixture are crushed by the crushing plates 22 and
23 rotating in the two rotation rotors 20 and 21.
Further, every neighboring two rotation rotors 20 and 21 have different
rotation speed. For this, a reduction gear 50 is provided between the two
20 rotation rotors 20 and 21, and differentiates relative rotation speed of the two
rotation rotors 20 and 21 while providing power between the two rotation rotors
20 and 21. A relative rotation speed difference between the two rotation rotors
20 and 21 is variously changed, and not limited to a specific value.
The reduction gear 50 may be formed of, for example, gear groups
10
respectively provided in the two rotation rotors 20 and 21 and each having a
different number of teeth. Thus, when the rotation rotor 20 connected to the
driver rotates, the other rotation rotor 21 connected to the reduction gear 50
rotates. In this case, since a rotation ratio is varied and transferred through the
5 reduction gear 50, the rotation rotor 20 connected to the driving motor and the
rotation rotor 21 connected through the reduction gear 50 have different rotation
speed. Accordingly, the two rotation rotors 20 and 21 respectively rotate with
different speed. Thus, when a mixture is attached to the crushing plates 22 and
23 provided in one rotation rotor 20 and 21, the crushing plates 22 and 23
10 provided in other rotation rotors 20 and 21 that rotate with relatively low or fast
speed scrape the attached mixture while passing through the opposite crushing
plates 22 and 23 such that attachment of the mixture can be prevented.
In the present exemplary embodiment, the respective crushing plates 22
and 23 provided in the two rotation rotors 20 and 21 may be formed in shapes
15 that are different from each other. As shown in FIG. 3, the crushing plate 23
provided in one rotation rotor 21 is formed in the shape of a round plate, and the
crushing plate 22 provided in the other rotation rotor 20 is formed with a structure
in which a plurality of wings 25 extended in a radial direction are arranged while
each having an angle along a circumference direction. The wings 25 of each
20 crushing plate 22 may be formed in the same location along the shaft direction of
the rotation rotor, or may be formed respectively in different locations.
In case of the above-stated structure, when the two rotation rotors 20
and 21 relatively rotates, side surfaces of the wings 25 wholly scrape the
crushing plate 23 while passing between the round-shaped crushing plate 23
11
such that the attached mixture can be further completely scrapped.
Meanwhile, the viscid mixture attached to the crushing plates 22 and 23
are scrapped by the scraper member attached to the front side of the crushing
plates 22 and 23 and thus completely separated from the crushing plates 22 and
5 23.
As shown in FIG. 4 and FIG. 5, the scraper member 40 is extended along
the shaft direction of the rotation rotors 20 and 21 in the housing 12 and thus
lateral front ends thereof are fixed to the housing 12. Two scraper members 40
are provided corresponding to the crushing plates 22 and 23 provided in the
10 respective rotation rotors 20 and 21.
Each scraper member 40 includes an upper end portion 41 extended
toward the crushing plates 22 and 23 and where grooves 42 through which the
crushing plates 22 and 23 pass are formed at corresponding locations of the
crushing plates 22 and 23 of the rotation rotors 20 and 21 to scrap coal attached
15 to the crushing plates 22 and 23 and a lower end portion 44 connected to a lower
end of the upper end 41 and extended downward, passing through the front
ends of the crushing plates 22 and 23 to guide coals. The lower end portion 44
of the scraper member 40 is integrally formed with the upper end portion 41.
The grooves 42 formed in the upper end portion 41 of the scraper 40
20 may correspond to the thickness of the crushing plates 22 and 23 in size. As
shown in FIG. 4, the upper end portion 41 of the scraper member 40 contacts
both sides of the crushing plates 22 and 23 by being inserted between the
crushing plates 22 and 23. Thus, as the crushing pates 22 and 23 relatively
rotate with respect to the scraper member 40 fixed in the housing 12, the mixture
12
attached to the crushing plates 22 and 23 is scrapped and detached by the
scraper member 40.
In the present exemplary embodiment, the upper end portion 41 of the
scraper member 40 is inclined opposite to the rotation direction of the rotation
5 rotors 20 and 21. For example, as shown in FIG. 5, when the rotation rotor 20
rotates in the counterclockwise direction, the upper end portion 41 of the scraper
member 40 forms an inclined surface that is inclined to the left side. When the
rotation rotor rotates in the clockwise direction, the upper end portion 41 of the
scraper 41 also forms an inclined surface that is inclined to the right side.
10 As described, the upper end portion 41 of the scraper member 40 that
contacts the crushing plates 22 and 23 is inclined and thus forms an inclined
surface, and thus when the crushing plates 22 and 23 rotate, the weight of the
mixture attached to the crushing plates 22 and 23 is applied to the upper end
portion 41 in a perpendicular direction. That is, as shown in FIG. 5, the mixture
15 attached to the crushing plate 22 is extruded by the upper end portion 41 of the
scraper member 40 and thus detached from the crushing plate 22, and since the
upper end portion 41 forms the inclined surface, the mixture attached to the
crushing plate 22 is applied with a force in the perpendicular direction of the
upper end portion 41. Thus, the scraper member 40 can more easily remove
20 the mixture attached to the crushing plate 22. The mixture detached from the
crushing plate 22 by the upper end portion 41 is introduced to the lower end
portion 44 along the upper end portion 41 and then dropped down through the
lower end portion 44.
Hereinafter, an effect of the coal briquette manufacturing apparatus
13
according to the present exemplary embodiment will be described.
The viscid mixture of the binder and coal is flown into the crusher 10
through a transfer screw. The mixture flown into the crusher 10 passes through
the two rotation rotors 20 and 21 that rotate in the opposite direction and thus
5 lumped coals included in the mixture are crushed by the crushing plates 22 and
23 provided in the rotation rotors 20 and 21.
The two rotation rotors 20 and 21 continuously crush the mixture and
move the crushed mixture downward. Through such a process, attachment of
the viscid mixture to the crushing plates 22 and 23 can be minimized by the
10 crushing plates 22 and 23 that rotate while being alternately overlapped with
each other. Since the two rotation rotors 20 and 21 rotate with different rotation
speed, the crushing plates 22 and 23 provided in each of the rotation rotors 20
and 21 also rotate with relatively different speed. Thus, crushing plates 22 and
23 of rotation rotor 20 and 21 that are being overlapped with respect to crushing
15 plates 22 and 23 of other rotation rotors 20 and 21 rotate with relatively slow or
rapid speed such that mixtures attached to the respective crushing plates 22 and
23 are scrapped and detached.
In addition, the viscid mixture attached to the crushing plates 22 and 23
is scrapped by the scraper member 40 attached to the front surfaces of the
20 crushing plates 22 and 23 while the crushing plates 22 and 23 rotate such that
the mixture is detached from the crushing plates 22 and 23. In the scraper
member 40, since the upper end portion 41 is extended between the respective
crushing plates 22 and 23 provided in each rotation rotors 20 and 21, the
mixtures attached to the respective crushing plates 22 and 23 can be completely
14
removed.
As described, the crusher 10 can prevent attachment of a viscid mixture
to the crushing plates 22 and 23 and continuously perform a sufficient crushing
work with relative rotation movement of the crushing plates 22 and 23 provided
5 in the two rotation rotors 20 and 21 and the scraper member 40.
While this invention has been described in connection with what is
presently considered to be practical exemplary embodiments, it is to be
understood that the invention is not limited to the disclosed embodiments, but,
on the contrary, is intended to cover various modifications and equivalent
10 arrangements included within the spirit and scope of the appended claims.

【CLAIMS】
【Claim 1】
A coal briquette manufacturing apparatus comprising a mixer forming a
mixture of powered coal and a binder, a gravity feeder connected to a lower end
5 of the mixer and feeding the mixture, a molding device connected to a lower end
of the gravity feeder and molding the mixture fed from the gravity feeder, and a
crusher provided in an upper end of the gravity feeder and crushing the mixture
flown into the gravity feeder,
wherein the crusher comprises rotation rotors rotatably provided in a
10 housing and having crushing plates disposed at a distance from each other
along the shaft direction, a driver rotating the rotation rotors, and a scraper
member provided in the housing and disposed in front surfaces of the crushing
plates to scrape mixtures attached to the crushing plates.
【Claim 2】
The coal briquette manufacturing apparatus of claim 1, wherein the
rotation rotors comprises at least two rotation rotors and arranged in parallel with
each other in the housing, and crushing plates provided in each of neighboring
rotation rotors are alternately arranged.
【Claim 3】
The coal briquette manufacturing apparatus of claim 2, wherein the two
neighboring rotation rotors have different rotation speed.
【Claim 4】
The coal briquette manufacturing apparatus of claim 3, further
comprising a reduction gear provided between the two neighboring rotation
5 rotors and differentiating relative rotation speed of the two rotation rotors.
【Claim 5】
The coal briquette manufacturing apparatus of claim 4, wherein the two
neighboring rotation rotors have different rotation directions.
【Claim 6】
The coal briquette manufacturing apparatus of any one of claim 1 to
claim 5, wherein the scraper member comprises an upper end portion extended
toward the crushing plates and having a groove through which the crushing plate
15 passes formed at location corresponding to each crushing plate of the rotation
rotor and a lower end portion connected to a lower end of the upper end portion
and extended downward while passing through the crushing plates of the
rotation rotor to guide a mixture.
【Claim 7】
The coal briquette manufacturing apparatus of claim 6, wherein the
scraper member formed with a structure in which the upper end portion located
in the crushing plate is inclined with respect to a rotation direction of the rotation
rotor.
【Claim 8】
The coal briquette manufacturing apparatus of claim 7, wherein crushing
5 plates provided in one rotation rotor among the two neighboring rotation rotors
are formed in the shape of a round plate, and crushing plates of the other
rotation rotor have a structure in which a plurality of wings extended in a radial
direction are arranged while respectively having an angle along a circumference
direction.