CN111981858B - Vertical type cement clinker pneumatic particle grading cooler and cooling method - Google Patents

Abstract

The invention relates to the field of coolers, in particular to a vertical type cement clinker pneumatic particle grading cooler which comprises a cooling cavity, a primary heat exchange device and a secondary heat exchange device, wherein the primary heat exchange device comprises a plurality of driving rollers and fixed rollers, and a first ventilation cavity is arranged in each fixed roller; the secondary heat exchange device comprises a discharging unit, the discharging unit comprises a fixed plate body and a rotating plate body, the rotating plate body comprises a first working position and a second working position, the top surface of the first working position is coplanar with the fixed plate body to support materials, the second working position forms a discharging gap, and a second air cavity for supplying air to the outside is arranged in the fixed plate body; a buffer cooling area is formed between the first-stage heat exchange device and the second-stage heat exchange device, a main cooling area is formed between the first-stage heat exchange device and the bottom of the shell, and the two areas are independently cooled. The invention effectively improves the heat exchange efficiency, and simultaneously requests to protect the cooling method of the vertical cement clinker pneumatic particle grading cooler, and the cooling method has the same technical effect.

Description

Vertical type cement clinker pneumatic particle grading cooler and cooling method

Technical Field

The invention relates to the field of coolers, in particular to a vertical type cement clinker pneumatic particle grading cooler and a cooling method.

Background

The cooler is a cooling device commonly used in a cement burning system, and mainly adopts a horizontal cooler in the industry at present, but the existing horizontal cooler carries out heat exchange between airflow and solids through local countercurrent heat exchange, so that the heat exchange efficiency is low, and the production cost is difficult to reduce.

In view of the above-mentioned existing defects, the inventor of the present invention has made a study and innovation based on the practical experience and professional knowledge of the product design and manufacture for many years, and together with the application of the theory, to create a vertical type pneumatic particle classification cooler for cement clinker and a cooling method thereof, so as to make the vertical type pneumatic particle classification cooler more practical.

Disclosure of Invention

The invention provides a vertical cement clinker pneumatic particle grading cooler, which effectively improves the heat exchange efficiency so as to solve the problems in the background art, and simultaneously, the invention also requests to protect a cooling method of the vertical cement clinker pneumatic particle grading cooler, and the cooling method has the same technical effect.

In order to achieve the purpose, the invention adopts the technical scheme that:

a vertical pneumatic particle classification cooler for cement clinker, comprising:

the rotary kiln comprises a shell and a rotary kiln, wherein the shell is provided with a cooling cavity, the side wall of the top of the cooling cavity is communicated with the rotary kiln, the top of the cooling cavity is also provided with an air outlet, and the bottom of the cooling cavity is provided with a discharge end;

the primary heat exchange device is positioned at the bottom of the cooling cavity and comprises a plurality of groups of transverse rolling units, each rolling unit comprises a driving roller and a fixed roller, the axes of the driving rollers are parallel, the driving rollers rotate relative to the fixed rollers, a first ventilation cavity is arranged in each fixed roller, the first ventilation cavity supplies air to the outside through a first hole, and the air supply direction faces to the oblique lower side of a gap between the driving rollers and the fixed rollers;

the second-stage heat exchange device is positioned between the first-stage heat exchange device and the rotary kiln discharging position, and comprises discharging units which are arranged in one-to-one correspondence with the rolling units, each discharging unit comprises a fixed plate body and a rotating plate body, each rotating plate body comprises a first working position and a second working position, the top surface of each rotating plate body is coplanar with the corresponding fixed plate body, the first working position supports materials, the second working position rotates relative to the corresponding fixed plate body to form a discharging gap, a second air cavity is arranged in the corresponding fixed plate body, the second air cavity supplies air to the outside through a second hole, and the air supply direction faces the discharging gap;

form the buffering cooling region between one-level heat exchange device and the second grade heat exchange device, one-level heat exchange device with form the main cooling region between the casing bottom, buffering cooling region and main cooling region are provided with independent cooling gas air feed end respectively and give vent to anger the end.

Further, the diameter of the fixed roller is larger than that of the driving roller.

Further, the driving roller is located below the fixed plate body, and the fixed roller is located below the rotating plate body.

Furthermore, the air outlet end of the second hole site is arranged on the longitudinal end face of the fixed plate body positioned on one side of the discharging gap.

Further, the top surface of the fixed plate body is inclined downward in a direction away from the outlet end of the rotary kiln.

Further, still be provided with the partition structure in the cooling cavity, including being located the baffle of buffering cooling zone one side and with the baffle top is connected and is relative the guide board that export one side of rotary kiln leans out, the partition structure with form the fine grain cooling zone between the casing lateral wall, fine grain cooling zone bottom with main cooling zone UNICOM, the top with second grade heat exchange device headspace UNICOM.

Furthermore, the guide plate is of a sieve plate structure, and a plurality of through hole sites are uniformly distributed on the guide plate.

Further, the horizontal outside protrusion in casing top has the extension chamber, guide board top to extend the inside extension in chamber, the venthole is located extend the chamber top.

Further, when the rotating plate body is located at the first working position, the second hole position is located at the bottom of the rotating plate body.

A cooling method of the vertical cement clinker pneumatic particle classification cooler as described above, comprising the steps of:

s1: the materials fall from the rotary kiln to a fixed plate body and a rotating plate body positioned at a first working position for storage;

s2: when the materials are stored to a set amount, the rotating plate body rotates to a second working position for centralized unloading, and in the unloading process, the second air cavity continuously supplies air and supplies air to the materials through the second hole position;

s3: when the materials reach the buffering cooling area, the driving roller rotates to extrude the materials, the materials fall to the main cooling area from a gap between the driving roller and the fixed roller, and in the falling process, the first ventilation cavity continuously supplies air and supplies air to the materials through the first hole;

in the processes of steps S2 and S3, the air supply end in the buffer cooling area and the air supply end in the main cooling area continuously supply air, and the air outlet end continuously discharges air.

Through the technical scheme of the invention, the following technical effects can be realized:

the invention provides a vertical cement clinker pneumatic particle grading cooler, which effectively improves the heat exchange efficiency, and simultaneously, the invention also requests to protect a cooling method of the vertical cement clinker pneumatic particle grading cooler, and the cooling method has the same technical effect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of a vertical cement clinker pneumatic particle classification cooler (with a shell partially cut away);

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a schematic view of FIG. 1 at another angle;

FIG. 4 is a partial schematic view of a roll unit;

FIG. 5 is a front view of FIG. 4;

FIG. 6 is a schematic view of FIG. 4 at another angle;

FIG. 7 is a partial schematic view of a discharge unit;

FIG. 8 is a front view of FIG. 7;

reference numerals: 1. a housing; 11. an air outlet; 12. a discharge end; 2. a rotary kiln; 4. a primary heat exchange device; 41. a drive roll; 42. a fixed roller; 421. a first vent cavity; 422. a first hole site; 5. a secondary heat exchange device; 51. fixing the plate body; 511. a second vent cavity; 512. a second hole site; 52. rotating the plate body; 6. a partition structure; 61. a baffle plate; 62. a guide plate.

Detailed Description

The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. This embodiment is written in a progressive manner.

As shown in fig. 1 to 8, a vertical pneumatic particle classification cooler for cement clinker comprises: the rotary kiln comprises a shell 1 and a rotary kiln 2, wherein the shell is provided with a cooling cavity, the top of the cooling cavity is communicated with the rotary kiln 2, the top of the cooling cavity is also provided with an air outlet 11, and the bottom of the cooling cavity is provided with a discharge end 12; the primary heat exchange device 4 is positioned at the bottom of the cooling cavity and comprises a plurality of groups of transverse rolling units, each rolling unit comprises a driving roller 41 and a fixed roller 42, the axes of the driving rollers 41 are parallel to the axes of the fixed rollers 42, the driving rollers 41 rotate relative to the fixed rollers 42, first air cavities 421 are formed in the fixed rollers 42, air is supplied to the outside through first hole positions 422 through the first air cavities 421, and the air supply direction of the first air cavities 421 faces to the oblique lower side of a gap between the driving rollers 41 and the fixed rollers 42; the secondary heat exchange device 5 is positioned between the primary heat exchange device 4 and the discharging position of the rotary kiln 2, and comprises discharging units which are arranged in one-to-one correspondence with the rolling units, each discharging unit comprises a fixed plate body 51 and a rotating plate body 52, each rotating plate body 52 comprises a first working position and a second working position, the top surfaces of the first working positions are coplanar with the fixed plate bodies 51 to support materials, the first working positions rotate relative to the fixed plate bodies 51 to form discharging gaps, a second air cavity 511 is arranged in each fixed plate body 51, the second air cavity 511 supplies air to the outside through a second hole position 512, and the air supply direction faces the discharging gaps; a buffer cooling area is formed between the primary heat exchange device 4 and the secondary heat exchange device 5, a main cooling area is formed between the primary heat exchange device 4 and the bottom of the shell 1, and the buffer cooling area and the main cooling area are respectively provided with an independent cooling gas supply end and an independent cooling gas outlet end.

The cooling method of the vertical cement clinker pneumatic particle grading cooler in the embodiment comprises the following steps:

s1: the material falls from the rotary kiln 2 to the fixed plate body 51 and the rotating plate body 52 at the first working position for storage, wherein the storage enables the amount of the material entering the buffer cooling area to be controlled each time;

s2: when the materials are stored to a set amount, the rotating plate body 52 rotates to a second working position for centralized discharging, and in the discharging process, the second air cavity 511 continuously supplies air and supplies air to the materials through the second hole position 512; the concentrated material discharging obtains a concentrated first cooling position, the falling materials are subjected to concentrated cooling by the wind from the second hole position 512, and the materials can be dispersed in a certain range under the action of the wind force, so that the following cooling effect is improved;

s3: when the materials reach the buffer cooling area, the driving roller 41 rotates to extrude the materials, and the materials fall from a gap between the driving roller 41 and the fixed roller 42 to the main cooling area; in the falling process of the material, the first air cavity 421 continuously supplies air and supplies air to the material through the first hole 422, so that the material is cooled in a relatively concentrated manner again, wherein the concentrated cooling in the steps S1 and S3 has small pneumatic power, and energy can be effectively saved;

in the processes of steps S2 and S3, the gas supply end and the gas outlet end in the buffer cooling area and the main cooling area continuously supply gas and continuously discharge gas, wherein the amount of material in the buffer cooling area is limited, so although the material is cooled by concentrated large power, the required power energy is effective, and the two materials cooled by concentration are both in flow state, so the required cooling gas power is also small, wherein the gas in the first hole site 422, the second hole site 512 and the main cooling cavity can be supplied by the same pressure, and only the pressure in the buffer cooling area needs to be properly raised. According to the invention, the cooling process obtains multi-stage cooling through the device and the steps, the running resistance of the gas required by cooling is effective, the energy utilization rate is high, and the heat exchange efficiency is high, so that the production cost is effectively reduced.

As a preference of the above embodiment, the diameter of the fixed roller 42 is larger than that of the driving roller 41, so that on one hand, the gas flow area of the first ventilating cavity 421 can be increased appropriately, and in addition, an uneven bottom form can be formed in the buffer cooling area, and a better heat exchange effect can be formed by collision reflection and the like.

As a preference of the above embodiment, the driving roller 41 is located below the fixed plate 51, and the fixed roller 42 is located below the rotating plate 52, so that during the rotation of the rotating plate 52, the material slides down to the driving roller 41 side, as shown in fig. 2, the material first obtains a tendency of moving to the left lower side in the drawing along the inclined direction of the rotating plate 52, and then is driven to move to the right side by the rolling of the driving roller 41 to enter the extrusion gap, so as to form a better heat exchange effect, and in order to further enhance the above effect, it is preferable that the cooling air in the buffer cooling space flows in the direction opposite to the unloading inclined direction of the rotating plate 52.

In the implementation process, in order to increase the impact on the materials, the air outlet end of the second hole site 512 is arranged on the longitudinal end face of the fixed plate body 51 on one side of the discharging gap, so that the materials are more directly subjected to the action of wind force to perform heat exchange in the falling process, as the preferred choice of the above embodiment, when the rotating plate body 52 is located at the first working position, the second hole site 512 is located at the bottom of the rotating plate body 52, so that when the materials do not fall, the air from the second hole site 512 can participate in the cooling of the materials in the buffer cooling area, and when the materials fall, the air directly acts on the falling materials and can flow out from the air outlet end of the top air outlet hole 11 and the air outlet end of the buffer cooling area; for better material circulation, the top surface of the fixed plate body 51 is inclined downwardly in a direction away from the outlet end of the rotary kiln 2.

Preferably, a partition structure 6 is further arranged in the cooling cavity, and comprises a baffle 61 positioned on one side of the buffer cooling area and a guide plate 62 connected with the top of the baffle 61 and inclined outwards relative to the outlet side of the rotary kiln 2, a fine grain cooling area is arranged between the partition structure and the side wall of the shell 1, the bottom of the fine grain cooling area is communicated with the main cooling area, the top of the fine grain cooling area is communicated with the top space of the secondary heat exchange device 5, under the action of wind, the materials in the top of the cooling cavity and the buffer cooling area can enter the fine particle cooling area from the top of the secondary heat exchange device 5, while the materials in the main cooling area can enter the fine particle cooling area from the bottom, in this region the fine-grained matter can fall down by settling and a further cold zone is obtained there, which does not require additional cooling power, further increasing the cooling efficiency.

Wherein, the guide plate 62 is a sieve plate structure, a plurality of through hole sites are uniformly distributed on the guide plate, and fine particles can enter a fine particle cooling area from the through hole sites in the process; the top of the shell 1 is provided with an extending cavity protruding outwards, the top of the guide plate 62 extends towards the inside of the extending cavity, and the air outlet hole 11 is positioned at the top of the extending cavity, so that the air outlet circulation trend of the air outlet hole 11 can improve the probability that fine particles enter a fine particle cooling area, and the material flows out downwards from the discharge end 12 after being settled.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. A vertical cement clinker pneumatic particle grading cooler is characterized by comprising:

the rotary kiln comprises a shell (1) and a rotary kiln body (2), wherein the shell is provided with a cooling cavity, the side wall of the top of the cooling cavity is communicated with the rotary kiln body, the top of the cooling cavity is also provided with an air outlet (11), and the bottom of the cooling cavity is provided with a discharge end (12);

the primary heat exchange device (4) is positioned at the bottom of the cooling cavity and comprises a plurality of groups of transverse rolling units, each rolling unit comprises a driving roller (41) and a fixed roller (42), the axes of the driving rollers (41) are parallel to each other, the driving rollers (41) rotate relative to the fixed rollers (42), a first air passing cavity (421) is arranged in each fixed roller (42), the first air passing cavity (421) supplies air to the outside through a first hole position (422), and the air supply direction faces the oblique lower side of a gap between the driving rollers (41) and the fixed rollers (42);

the secondary heat exchange device (5) is positioned between the primary heat exchange device (4) and the discharging position of the rotary kiln (2), and comprises discharging units which are arranged in one-to-one correspondence with the rolling units, each discharging unit comprises a fixed plate body (51) and a rotating plate body (52), each rotating plate body (52) comprises a first working position and a second working position, the top surfaces of the first working position and the second working position are coplanar with the fixed plate bodies (51), the first working position supports materials, the second working position rotates to the second working position relative to the fixed plate bodies (51) to form discharging gaps, a second air cavity (511) is arranged in each fixed plate body (51), the second air cavity (511) supplies air to the outside through a second hole position (512), and the air supply direction faces the discharging gaps;

form the buffering cooling region between one-level heat exchange device (4) and second grade heat exchange device (5), one-level heat exchange device (4) with form the main cooling region between casing (1) bottom, the buffering cooling region is provided with independent cooling gas air feed end respectively with the main cooling region and gives vent to anger the end.

2. The shaft cement clinker pneumatic particle classifying cooler according to claim 1, wherein the diameter of the fixed roller (42) is larger than the diameter of the driving roller (41).

3. The shaft cement clinker pneumatic particle classifying cooler according to claim 1 or 2, wherein the driving roller (41) is located below the stationary plate (51) and the stationary roller (42) is located below the rotating plate (52).

4. The vertical cement clinker pneumatic particle classifying cooler according to claim 1, wherein the air outlet end of the second hole site (512) is provided on the longitudinal end surface of the fixed plate body (51) on the side of the discharge gap.

5. The shaft cement clinker pneumatic particle classifying cooler according to claim 1, wherein the top surface of the fixing plate (51) is inclined downward in a direction away from the outlet end of the rotary kiln (2).

6. The vertical cement clinker pneumatic particle classification cooler according to claim 5, wherein a separation structure (6) is further arranged in the cooling cavity, the separation structure comprises a baffle plate (61) positioned on one side of the buffer cooling area and a guide plate (62) connected with the top of the baffle plate (61) and inclined outwards relative to the outlet side of the rotary kiln (2), a fine particle cooling area is formed between the separation structure (6) and the side wall of the shell (1), the bottom of the fine particle cooling area is communicated with the main cooling area, and the top of the fine particle cooling area is communicated with the top space of the secondary heat exchange device (5).

7. The vertical pneumatic cement clinker particle classifying cooler according to claim 6, wherein the guide plate (62) is a sieve plate structure, and a plurality of through hole sites are uniformly distributed on the guide plate.

8. The vertical cement clinker pneumatic particle classification cooler according to claim 6, characterized in that the top of the housing (1) is horizontally protruded with an extension cavity, the top of the guide plate (62) extends towards the inside of the extension cavity, and the air outlet hole (11) is positioned at the top of the extension cavity.

9. The shaft cement clinker pneumatic particle classifying cooler according to claim 4, wherein the second hole site (512) is located at the bottom of the rotating plate body (52) when the rotating plate body (52) is in the first working position.

10. A method of cooling a shaft cement clinker air-actuated particle classification cooler as claimed in claim 1, characterized by the steps of:

s1: the materials fall from the rotary kiln (2) to a fixed plate body (51) and a rotating plate body (52) at a first working position for storage;

s2: when the materials are stored to a set amount, the rotating plate body (52) rotates to a second working position for centralized discharging, and in the discharging process, the second air cavity (511) continuously supplies air and supplies air to the materials through a second hole position (512);

s3: when the materials reach the buffering cooling area, the driving roller (41) rotates to extrude the materials, the materials fall to the main cooling area from a gap between the driving roller (41) and the fixed roller (42), and in the falling process, the first air cavity (421) continuously supplies air and supplies air to the materials through the first hole position (422);

in the processes of steps S2 and S3, the air supply end in the buffer cooling area and the air supply end in the main cooling area continuously supply air, and the air outlet end continuously discharges air.

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