CN212457859U - Cement kiln hood seal structure - Google Patents

Abstract

The utility model discloses a kiln head sealing structure of a cement kiln, which comprises an inner sleeve and an outer sleeve which are separately sleeved inside and outside, wherein the inner sleeve is sleeved outside the cement kiln, and a first material blocking movable ring which is arranged along the radial direction and a second material blocking movable ring which is arranged along the axial direction are sequentially fixed on the outer wall of the inner sleeve from front to back; a first material blocking static ring arranged along the radial direction is fixed on the inner wall of the outer sleeve between the first material blocking dynamic ring and the second material blocking dynamic ring, and a second material blocking static ring arranged along the axial direction is arranged between the second material blocking dynamic ring and the inner sleeve. The advantages are that: through first fender material rotating ring, second fender material rotating ring, first fender material quiet ring, the quiet ring isotructure cooperation of second fender material form first labyrinth seal, the plenum spun gas has formed the gas seal of second way, and the design of fish scale becomes for the third way is sealed, combines through triple seal structure, has carried out fine sealing to the risk between kiln head and the sealed of kiln head cover, and then reduces the energy consumption.

Description

Cement kiln hood seal structure

The technical field is as follows:

the utility model relates to a sealed technical field of cement kiln, specifically speaking relate to a cement kiln hood seal structure.

Background art:

the cement kiln head sealing device is composed of a traditional fish scale and a wear-resistant carbon-silicon-aluminum composite plate, and is single in structural form, poor in sealing effect and serious in ash leakage and air leakage. The sealing performance of the sealing device is good, and the relation between the process operation of the rotary kiln and the normal operation of the rotary kiln is large because the rotary kiln is operated under negative pressure, if the kiln head and the kiln head cover are not sealed well, external cold air enters the kiln, so that a certain relation proportion of the coal quantity, the material quantity and the air quantity in the kiln is damaged, the secondary air quantity entering the kiln by a cooler is reduced, the secondary air temperature is reduced, and the heat consumption is increased. Meanwhile, the load of the exhaust fan can be increased and the electric quantity can be increased due to the large amount of cold air entering. Under occasional positive pressure conditions, a large amount of clinker dust will be ejected through the poorly sealed kiln head seal, causing on-site environmental contamination at the first tier belt.

The utility model has the following contents:

an object of the utility model is to provide a cement kiln hood seal structure that leakproofness is good.

The utility model discloses by following technical scheme implement: the kiln head sealing structure of the cement kiln comprises an inner sleeve and an outer sleeve which are separately sleeved inside and outside, wherein the inner sleeve is sleeved outside the cement kiln, and a kiln head iron protector is sleeved between the front end of the inner sleeve and the front end of the kiln head of the cement kiln; a first material blocking movable ring arranged along the radial direction and a second material blocking movable ring arranged along the axial direction are sequentially fixed on the outer wall of the inner sleeve from front to back, and a reducing sleeve is connected between the rear end of the second material blocking movable ring and the rear end of the inner sleeve; an annular material baffle plate arranged along the radial direction is fixed at the front end of the outer sleeve in front of the first material blocking movable ring, a first material blocking static ring arranged along the radial direction is fixed on the inner wall of the outer sleeve between the first material blocking movable ring and the second material blocking movable ring, a second material blocking static ring arranged along the axial direction is arranged between the second material blocking movable ring and the inner sleeve, and the second material blocking static ring is fixedly connected with the bottom end of the first material blocking static ring; an annular air chamber is fixed on the inner wall of the outer sleeve behind the reducing sleeve, and fish scales in sliding contact with the outer wall of the cement kiln are fixed at the bottom end of the annular air chamber; an air inlet pipe is communicated with the bottom end of the annular air chamber, a plurality of air outlet pipes are arranged at the front end of the annular air chamber, and a drain pipe is communicated with the top end of the outer sleeve between the first material blocking static ring and the annular air chamber; the bottom of the front end of the outer sleeve is communicated with a blanking hopper.

Furthermore, an expanding sleeve is fixed at the rear end of the diameter reducing sleeve, and the air outlet pipes are divided into an inner ring and an outer ring; the air outlet pipe of the outer ring is horizontally arranged and is positioned between the tail end of the expanding sleeve and the outer sleeve; the air outlet pipe of the inner ring is obliquely arranged towards the outlet direction and is positioned between the tail end of the expanding sleeve and the inner sleeve.

Furthermore, an annular brush which is forwards inclined is fixed on the inner ring of the annular striker plate, and the top end of the brush is positioned on the outer side of the kiln head iron protector.

Furthermore, an annular baffle plate which is obliquely arranged backwards is fixed at the top end of the first material blocking movable ring.

Furthermore, a spiral baffle plate arranged along the axial direction is fixed on the inner wall of the emptying pipe.

The utility model has the advantages that: the first labyrinth seal is formed by the structural matching of the first material blocking movable ring, the second material blocking movable ring, the first material blocking static ring and the second material blocking static ring, the second gas seal is formed by gas sprayed from the air chamber, the third seal is formed by the design of the fish scale, and the risk between the kiln head and the kiln head cover seal is well sealed by the combination of the triple seal structures, so that cold air can be prevented from entering the cement kiln, the heat loss of the cement kiln is reduced, and the energy consumption is reduced; the utility model discloses a seal structure makes the hourglass volume of leaking out ash reduce to minimumly, and is significant to stabilizing normal production and improving the site operation environment.

Description of the drawings:

fig. 1 is a schematic view of the overall structure of the present invention.

The device comprises an inner sleeve 1, an outer sleeve 2, a cement kiln 3, kiln head iron protectors 4, a first material blocking movable ring 5, a second material blocking movable ring 6, a reducing sleeve 7, an annular material blocking plate 8, a first material blocking static ring 9, a second material blocking static ring 10, an annular air chamber 11, an air inlet pipe 12, an air outlet pipe 13, an emptying pipe 14, a blanking hopper 15, an expanding sleeve 16, a brush 17, an annular baffle plate 18, a spiral baffle plate 19 and fish scales 20.

The specific implementation mode is as follows:

in the description of the present invention, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1, a kiln head sealing structure of a cement kiln comprises an inner sleeve 1 and an outer sleeve 2 which are separately sleeved inside and outside, wherein the inner sleeve 1 is sleeved outside a cement kiln 3, and a kiln head iron protector 4 is sleeved between the front end of the inner sleeve 1 and the front end of the kiln head of the cement kiln 3; a first material blocking movable ring 5 arranged along the radial direction and a second material blocking movable ring 6 arranged along the axial direction are sequentially fixed on the outer wall of the inner sleeve 1 from front to back, and an annular baffle plate 18 which is inclined towards the rear is fixed at the top end of the first material blocking movable ring 5, so that the circulation time of airflow can be prolonged, and the sedimentation of dust can be accelerated; a reducing sleeve 7 is connected between the rear end of the second material retaining movable ring 6 and the rear end of the inner sleeve 1; an annular material baffle 8 which is arranged along the radial direction is fixed at the front end of an outer sleeve 2 in front of a first material blocking movable ring 5, an annular brush 17 which is arranged in a forward inclining mode is fixed at the inner ring of the annular material baffle 8, the top end of the brush 17 is located on the outer side of a kiln head iron protector 4, a gap between the annular material baffle 8 and the kiln head iron protector 4 can be sealed by arranging the brush 17, and overflowing gas is prevented from overflowing through the gap between the annular material baffle 8 and the kiln head iron protector 4.

A first material blocking static ring 9 arranged along the radial direction is fixed on the inner wall of the outer sleeve 2 between the first material blocking dynamic ring 5 and the second material blocking dynamic ring 6, a second material blocking static ring 10 arranged along the axial direction is arranged between the second material blocking dynamic ring 6 and the inner sleeve 1, and the second material blocking static ring 10 is fixedly connected with the bottom end of the first material blocking static ring 9; labyrinth seals are formed among the first material blocking movable ring 5, the second material blocking movable ring 6, the first material blocking static ring 9 and the second material blocking static ring 10; an annular air chamber 11 is fixed on the inner wall of the outer sleeve 2 behind the reducing sleeve 7, an air inlet pipe 12 is communicated with the bottom end of the annular air chamber 11, and compressed air is sent into the annular air chamber 11 through the air inlet pipe 12; a plurality of air outlet pipes 13 are arranged at the front end of the annular air chamber 11, and a drain pipe 14 is communicated with the top end of the outer sleeve 2 between the first material blocking static ring 9 and the annular air chamber 11; the bottom of the front end of the outer sleeve 2 is communicated with a blanking hopper 15; the gas containing dust is sprayed outwards along the excircle of the inner sleeve 1 through the gap between the kiln head iron protector 4 and the inner sleeve 1 in the state of positive pressure at the kiln head, firstly, the gas can collide with the first material blocking movable ring 5, more than 85 percent of particles lose kinetic energy due to collision, and the gas enters the blanking hopper 15 under the action of gravity; then enters the rear part of the outer sleeve 2 through the sealing structures of the first material blocking static ring 9, the second material blocking static ring 10 and the second material blocking movable ring 6, and more than 95 percent of materials are collected and recycled in the sealing structures; after the gas containing dust enters the rear part of the outer sleeve 2, the gas is pressed by the gas flow sprayed out from the annular wind chamber 11 to realize gas sealing and prevent dissipation; an expanding sleeve 16 is fixed at the rear end of the reducing sleeve 7, and the air outlet pipes 13 are divided into an inner ring and an outer ring; the air outlet pipe 13 of the outer ring is horizontally arranged and is positioned between the tail end of the expanding sleeve 16 and the outer sleeve 2; the air outlet pipe 13 of the inner ring is obliquely arranged towards the outlet direction and is positioned between the tail end of the expanding sleeve 16 and the inner sleeve 1; the air sent out by the air outlet pipe 13 of the outer ring mainly plays a sealing role, the cold air blown out from the air outlet pipe 13 of the outer ring forms a micro-positive pressure at the labyrinth position to press a small amount of flying sand which runs out, and the flying sand also descends under the action of gravity and is collected by the blanking hopper 15; the air outlet pipe 13 of the inner ring mainly cools the kiln head protection iron 4, so that the protection iron is prevented from deforming due to high temperature, and the sealing property is ensured.

The bottom end of the annular air chamber 11 is fixed with a fish scale 20 which is in sliding contact with the outer wall of the cement kiln 3, and a very small amount of materials (less than 1%) are sealed with gas through a labyrinth, are blocked by the fish scale 20 and are collected into the blanking hopper 15;

the air current that annular plenum 11 discharged finally discharges through evacuation pipe 14, is fixed with the spiral baffling board 19 along the axial setting at the inner wall of evacuation pipe 14, and the in-process that the air current discharged through evacuation pipe 14 rises along spiral baffling board 19, and the dust granule that carries in the air current can strike spiral baffling board 19 after the effect of gravity fall back to the inside of outer sleeve 2, collects blanking fill 15 finally.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (7)

1. The kiln head sealing structure of the cement kiln is characterized by comprising an inner sleeve and an outer sleeve which are separately sleeved inside and outside, wherein the inner sleeve is sleeved outside the cement kiln, and kiln head iron protectors are sleeved between the front end of the inner sleeve and the front end of the kiln head of the cement kiln; a first material blocking movable ring arranged along the radial direction and a second material blocking movable ring arranged along the axial direction are sequentially fixed on the outer wall of the inner sleeve from front to back, and a reducing sleeve is connected between the rear end of the second material blocking movable ring and the rear end of the inner sleeve; an annular material baffle plate arranged along the radial direction is fixed at the front end of the outer sleeve in front of the first material blocking movable ring, a first material blocking static ring arranged along the radial direction is fixed on the inner wall of the outer sleeve between the first material blocking movable ring and the second material blocking movable ring, a second material blocking static ring arranged along the axial direction is arranged between the second material blocking movable ring and the inner sleeve, and the second material blocking static ring is fixedly connected with the bottom end of the first material blocking static ring; an annular air chamber is fixed on the inner wall of the outer sleeve behind the reducing sleeve, and fish scales in sliding contact with the outer wall of the cement kiln are fixed at the bottom end of the annular air chamber; an air inlet pipe is communicated with the bottom end of the annular air chamber, a plurality of air outlet pipes are arranged at the front end of the annular air chamber, and a drain pipe is communicated with the top end of the outer sleeve between the first material blocking static ring and the annular air chamber; the bottom of the front end of the outer sleeve is communicated with a blanking hopper.

2. The kiln head sealing structure of the cement kiln according to claim 1, wherein an expanding sleeve is fixed at the rear end of the reducing sleeve, and the air outlet pipes are divided into an inner ring and an outer ring; the air outlet pipe of the outer ring is horizontally arranged and is positioned between the tail end of the expanding sleeve and the outer sleeve; the air outlet pipe of the inner ring is obliquely arranged towards the outlet direction and is positioned between the tail end of the expanding sleeve and the inner sleeve.

3. The cement kiln head sealing structure as claimed in claim 1 or 2, wherein an annular brush inclined forwards is fixed on the inner ring of the annular striker plate, and the top end of the brush is positioned outside the kiln head back iron.

4. The kiln head sealing structure of the cement kiln as claimed in claim 1 or 2, wherein an annular baffle plate is fixed at the top end of the first material blocking movable ring and is inclined backwards.

5. The kiln head sealing structure of the cement kiln as claimed in claim 3, wherein an annular baffle plate is fixed at the top end of the first material blocking movable ring and is inclined backwards.

6. The cement kiln hood sealing structure of claim 1, 2 or 5, wherein a spiral baffle plate arranged along the axial direction is fixed on the inner wall of the emptying pipe.

7. The kiln head sealing structure of the cement kiln as claimed in claim 3, wherein a spiral baffle plate is fixed on the inner wall of the emptying pipe along the axial direction.

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