JPH05139799A - Cooler for cement clinker - Google Patents

Abstract

PURPOSE:To improve the efficiency of cooling cement clinker and to improve the efficiency of recovering the heat of cooling air by providing the cooler for cement clinker which can efficiently make heat exchange of the cement clinker and the cooling air. CONSTITUTION:The cement clinker 3 introduced from a kiln 1 via grate cooler 11 is packed into a cooler body 12 after the largelump clinker 3' is crushed to small lumps by using a breaker 13. This cement clinker 3 is rapidly cooled in the upper part in the cooler body 12 by the primary cooling air 8 which is uniformly distributed and supplied via a primary cooling air blowing bar 16 and further, the fine-grained cement clinker 3 is packed into secondary cooling air chambers 25, 26 from communicating holes 24 of inclined plates 20, 21 and is cooled by the secondary air 34. The cement clinker 3 of relatively large grain sizes is packed into a main packing section 23 and while the clinker is kept turned over in a bent part 22, the clinker is cooled by the secondary cooling air 34.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cement clinker cooling device.

[0002]

2. Description of the Related Art FIG. 4 shows an example of a conventional cement clinker cooling device generally called a great cooler, in which 1 is a rotating cylindrical kiln, and a downstream end 2 is lowered. The cement clinker 3 descends inside the kiln 1 according to the inclination. A burner 4 is provided on the end 2 side of the kiln 1 so that a heating gas is sent to the inside of the kiln 1 to burn the cement clinker 3 descending inside the kiln 1. The fired cement clinker 3 falls into a great cooler 5 provided below the end 2 of the kiln 1 and is cooled.

Inside the great cooler 5, the fixed grid plate 6a and the movable grid plate 6b are inclined from the position below the end 2 of the kiln 1 toward the left side of the drawing so that the ends overlap in sequence.
Are alternately arranged.

Each of the lattice plates 6a, 6b has a large number of slits on the surface thereof.
Cooling air 8 sent to the lower side of 6b passes through the slit and is jetted upward.

The movable lattice plate 6b is attached to a movable frame 10 which reciprocates in the direction of the arrow by a driving device 9, and the reciprocating movement of the movable frame 10 causes the cement clinker 3 on each lattice plate 6a, 6b to move. It is designed to be sent to the left one by one.

Then, the cement clinker 3 which has been burned in the kiln 1 and dropped from the end 2 into the great cooler 5
Reaches on the rightmost grid plate 6a in FIG. Then, the cement clinker 3 cooled by the cooling air 8 ejected from the slits of the lattice plates 6a and 6b while being sequentially moved to the left by the reciprocating movement of the movable lattice plate 6b is cooled, and the cement clinker 3 is removed from the left end (not shown) of the great cooler 5. It is taken out from the exit. On the other hand, a part of the cooling air 8 ejected from the slits of the lattice plates 6a and 6b to cool the cement clinker 3 is used for combustion air of the burner 4 or a calcining furnace (not shown) provided upstream of the kiln 1. ) Is used as combustion air, and the rest is discharged to the outside.

[0007]

However, in the conventional great cooler 5 as described above, the cement clinker 3 is laid in a planar thin layer with the large clinker 3 ', which is difficult to cool, being mixed and cooled. Therefore, the heat exchange efficiency between the cement clinker 3 and the cooling air 8 is low,
There was a problem that the cooling efficiency was poor when viewed from the cement clinker 3 side, and the heat recovery efficiency was poor when viewed from the cooling air 8 side.

The present invention has been made in view of the above circumstances, and improves the cooling efficiency of a cement clinker by providing a cement clinker cooling device capable of efficiently exchanging heat between the cement clinker and cooling air. In addition, the purpose is to improve the heat recovery efficiency of the cooling air.

[0009]

According to the present invention, there is provided a cooler body provided downstream of the kiln so as to be able to be filled with a cement clinker from the kiln, and a breaker disposed above the inside of the cooler body. A primary cooling air blowing device arranged to uniformly distribute and supply the primary cooling air to the upper part of the cooler body; an upper sloping plate provided in the cooler body below the primary cooling air blowing device; and the upper part. A main filling part having at least one bending part formed therein having a lower sloping plate which is inclined in the opposite direction to the sloping plate, and formed on the both sloping plates for dropping a cement clinker of a predetermined size or less. Secondary cooling air chamber formed below the inclined plate so as to be able to fill the cement clinker dropped from the communicating hole and configured to introduce cooling air into the inside, the main filling portion and the secondary cooling Cement clinker cooling device characterized by having a clinker cutting device provided at the bottom of the air chamber, and a cement clinker characterized by providing a great cooler between the kiln and the cooler body. The present invention relates to a cooling device.

[0010]

Therefore, according to the present invention, the cement clinker from the kiln is crushed into small lumps by breaking the large clinker that is difficult to cool inside and mixed into the cooler body, and the filled cement clinker is packed into the cooler body. It is rapidly cooled by primary cooling air uniformly distributed and supplied through a primary cooling air blowing device in the upper part of the inside, and further, the cement clinker is divided into a fine-grain cement clinker and a relatively large-grain cement clinker, and the fine clinker is used. Granular cement clinker is filled in the secondary cooling air chamber and cooled by cooling air, and the cement clinker having a relatively large grain size is filled in the main filling portion and cooled by the secondary cooling air while being inverted at the bending portion.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show an embodiment of a cooling device for cement clinker according to the present invention, and the same reference numerals as those in FIG. 4 represent the same parts.

Reference numeral 11 in the drawing denotes a great cooler having a structure substantially similar to that of the great cooler 5 in FIG. 4 and shortened in the conveying direction of the cement clinker 3 (left-right direction in FIG. 1). Cooler body 1 that can be filled with cement clinker 3 from kiln 1 on the downstream side of great cooler 11.
Two are provided.

At a position above the inside of the cooler body 12,
A breaker 1 for crushing a large block clinker 3'in a cement clinker 3 guided from the great cooler 11 into small blocks.
3 is provided.

The breaker 13 is composed of a rotating portion 14 connected to a rotation driving device (not shown), and a hammer portion 15 pivotally attached to a plurality of circumferential portions of the rotating portion 14 (four locations in the illustrated example). (See FIG. 2).

Further, in the upper part of the cooler body 12,
Primary cooling air blowing bars 16 (primary cooling air blowing devices) are arranged in a staggered manner so that the primary cooling air 8 can be uniformly distributed and supplied (see FIG. 3).
Both ends of 6 are connected to a primary cooling air introduction pipe 17 that supplies primary cooling air 8 outside the cooler body 12.

The primary cooling air blowing bar 16 has a plurality of air blowing holes 18 for blowing the primary cooling air 8 from the primary cooling air introducing pipe 17, and has a mountain-shaped cross section on the upper side thereof. A cover 19 is attached to prevent the primary cooling air blow bar 16 from clogging with a clinker.

In the cooler body 12 below the primary cooling air blowing bar 16, there is an upper inclined plate 20 and a lower inclined plate 21 inclined in the opposite direction of the upper inclined plate 20 to form a bent portion 22. The formed main filling portion 23 is formed, and the inclined plates 20 and 21 are formed with a communication hole 24 having a size capable of dropping the cement clinker 3 having a predetermined size or less.

Further, below the respective inclined plates 20 and 21, there are provided secondary cooling air chambers 25 and 26 capable of filling the cement clinker 3 dropped from the communication hole 24, and the secondary cooling air is provided. Secondary cooling air introduction pipes 27, 2 are introduced into the chambers 25, 26 so that the secondary cooling air 34 can be introduced therein.
8 is connected.

In addition, double flap dampers 29, 30, for alternately opening and closing the cement clinker 3 so as to be cut out while ensuring the sealing property, are provided in the lower portions of the main filling portion 23 and the secondary cooling air chambers 25, 26. 31 (clinker cutting device) is provided.

Reference numeral 32 in the drawing is for burning a part of the cooling air 8 and 34, which has become high temperature by exchanging heat with the cement clinker 3 in the cooler body 12, into a calcining furnace (not shown) upstream of the kiln 1. Air outlet for guiding as air 8 ', 3
Reference numeral 3 denotes a conveyor for conveying the cement clinker 3 cut out from the flap dampers 29, 30, 31.

Then, the cement clinker 3 which has been fired in the kiln 1 and dropped from the end 2 into the great cooler 11
Is cooled by the primary cooling air 8 ejected from the slits of the lattice plates 6a and 6b while being sequentially moved to the right in FIG. 1 by the reciprocating movement of the movable lattice plate 6b, and is sequentially cooled from the downstream end of the great cooler 11. The main body 12 is dropped and filled.

At this time, the large block clinker 3'mixed and dropped in the cement clinker 3 is crushed into small blocks by the breaker 13 arranged immediately above the cooler body 12, and then the cooler body. Filled in 12.

The cement clinker 3 filled in the cooler main body 12 is first cooled by the primary cooling air 8 uniformly distributed and supplied through the primary cooling air blowing bar 16 to cooler main body 1.
It becomes a spouted bed at the upper part of 6 and is rapidly cooled.

Then, the cement clinker 3 descends through the main filling portion 23, and during the descending, the cement clinker 3 having a size smaller than a predetermined size is dropped from the communication hole 24 formed in each of the inclined plates 20 and 21 to obtain fine particles. Cement clinker 3
And the selected fine-grained cement clinker 3
Are filled in the secondary cooling air chambers 25 and 26.

The fine-grained cement clinker 3 filled in the secondary cooling air chambers 25, 26 is cooled by the secondary cooling air 34 introduced from the secondary cooling air introducing pipes 27, 28.

Further, the primary cooling air 8 that has cooled the fine-grained cement clinker 3 passes through the communication holes 24 of the inclined plates 20 and 21 and is introduced into the main filling portion 23, where the main filling portion 2
The cement clinker 3 in 3 is cooled.

At this time, since the cement clinker 3 in the main filling portion 23 is selected from the fine-grain cement clinker 3 and only the relatively large-grain cement clinker 3 remains, the fine-grain cement clinker 3 remains. Cooling is performed more efficiently than in the case of cooling with the primary cooling air 8 while the clinker 3 remains mixed.

Further, since the cement clinker 3 descending the main filling portion 23 is inverted by passing through the bending portion 22 in the middle thereof, the portion which was on the upper side when descending on the upper inclined plate 20 is When descending on the lower inclined plate 21, it is on the lower side, and cooling is performed without uneven cooling.

The cooling air 8 and 34 supplied into the cooler main body 12 become high temperature combustion air 8'by exchanging heat with the cement clinker 3, and the cooler main body 12 is cooled.
, And is guided to the kiln 1 or a calcination furnace (not shown).

Therefore, according to the above-mentioned embodiment, the cement clinker 3 guided from the kiln 1 through the great cooler 11 is mixed into the large clinker 3'which is hard to cool.
The cooler body 12
The cement clinker 3 filled in the inside of the cooler body 12 is rapidly cooled in the upper part of the cooler body 12 by the primary cooling air 8 uniformly distributed through the primary cooling air blowing bar 16, and the cement clinker 3 is finely divided. The cement clinker 3 having a grain size and the cement clinker 3 having a relatively large grain size are divided, and the cement clinker 3 having a fine grain size is filled in the secondary cooling air chambers 25 and 26 and cooled by the secondary cooling air 34. Main filling section 23 for cement clinker 3 with large particle size
And the secondary cooling air 3
Since the cement clinker 3 and the secondary cooling air 34 can be efficiently heat-exchanged by cooling with 4, the cooling efficiency of the cement clinker 3 can be significantly improved and the heat of the cooling air 8 and the heat of the cooling air 34 can be increased. Collection efficiency can be greatly improved.

Further, since the cooling efficiency of the cement clinker 3 can be greatly improved as described above, it is possible to reduce the overall equipment as compared with the conventional great cooler and the like, and to greatly reduce the construction cost. Can be reduced to

Further, as described above, the cooling efficiency of the cement clinker 3 can be greatly improved, so that the cement clinker 3 can be cooled with a smaller amount of cooling air 8 and 34 than in the conventional case, and the fan power is reduced. be able to.

The cement clinker cooling device of the present invention is not limited to the above-described embodiment, but the cement clinker from the kiln may be directly guided to the cooler body. It goes without saying that various changes can be made without departing from the scope of the invention.

[0035]

According to the cooling device for cement clinker of the present invention described above, various excellent effects as described below can be obtained.

(I) A cement clinker from the kiln,
The large clinker that is difficult to cool inside is crushed with a breaker to make small lumps, and then filled in the cooler body, and the filled cement clinker is evenly distributed in the upper part of the cooler body via the primary cooling air blowing bar. It is rapidly cooled by the supplied primary cooling air, and further, the cement clinker is divided into a fine-grain cement clinker and a relatively large-grain cement clinker, and the fine-grain cement clinker is filled in a secondary cooling air chamber and cooled. By cooling with air and cooling with secondary cooling air while filling the cement clinker with a relatively large particle size in the main filling part and reversing it, it is possible to efficiently exchange heat with the cement clinker and cooling air. The cooling efficiency of the cement clinker can be significantly improved, and the heat recovery efficiency of the cooling air can be significantly improved.

(II) Since the cooling efficiency of the cement clinker can be greatly improved as in the above (I), the overall equipment can be downsized and the construction cost can be significantly reduced. ..

(III) Since the cooling efficiency of the cement clinker can be greatly improved as in the above (I), the cement clinker can be cooled with a smaller amount of cooling air than before, and the fan power can be reduced. You can

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a detailed view of the breaker of FIG.

FIG. 3 is a view in the direction of arrows III-III in FIG.

FIG. 4 is a cross-sectional view showing a conventional example.

[Explanation of symbols]

 1 Kiln 3 Cement clinker 8 Primary cooling air 11 Great cooler 12 Cooler body 13 Breaker 16 Primary cooling air blowing bar (Primary cooling air blowing device) 20 Upper sloping plate 21 Lower sloping plate 22 Bending part 23 Main filling part 24 Communication hole 25 Two Secondary cooling air chamber 26 Secondary cooling air chamber 29 Flap damper (clinker cutting device) 30 Flap damper (clinker cutting device) 31 Flap damper (clinker cutting device) 34 Secondary cooling air

Claims (2)

[Claims] 1. A cooler body provided downstream of the kiln so that a cement clinker from the kiln can be filled therein.
A breaker arranged in an upper position inside the cooler body,
A primary cooling air blowing device arranged to uniformly distribute and supply primary cooling air to the upper part of the cooler body, an upper sloping plate provided in the cooler body below the primary cooling air blowing device, and the upper slope A main filling part having at least one bent part inside having a lower sloping plate which is inclined in the opposite direction to the plate, and formed on both the sloping plates in order to drop a cement clinker of a predetermined size or less A secondary cooling air chamber formed below the inclined plate so as to be able to fill the cement clinker dropped from the communication hole and configured to introduce cooling air into the inside, and the main filling portion and the secondary cooling air chamber. A cement clinker cooling device comprising: a clinker cutting device provided at a lower portion. 2. The cooling device for cement clinker according to claim 1, wherein a great cooler is provided between the kiln and the cooler body.