CN113465397A

CN113465397A - Production process of composite portland cement

Info

Publication number: CN113465397A
Application number: CN202110807473.2A
Authority: CN
Inventors: 许琰
Original assignee: Wuhan Hanxiang Yiyuan Building Materials Co ltd
Current assignee: Wuhan Hanxiang Yiyuan Building Materials Co ltd
Priority date: 2021-07-16
Filing date: 2021-07-16
Publication date: 2021-10-01

Abstract

The invention relates to a production process of composite portland cement, in particular to a vertical cooler for composite portland cement clinker, which comprises a cooling bin and a plurality of ventilation cooling devices which are vertically arranged and assembled in the cooling bin; the cooling machine provided by the invention solves the problems that the heat dissipation effect is influenced by clinker accumulation in the clinker cooling process in the production and preparation of the composite portland cement and more clinker powder is mixed in the discharged hot air flow by adopting a cold air direct blowing mode.

Description

Production process of composite portland cement

Technical Field

The invention relates to the technical field of cement production, and particularly provides a production process of composite portland cement.

Background

The composite portland cement is a hydraulic cementing material prepared by grinding portland cement clinker, two or more specified mixed materials and a proper amount of gypsum, and is called composite portland cement. The composite portland cement is roughly subjected to three large process links of raw material preparation, clinker preparation and cement preparation in the production preparation process, wherein in the clinker preparation link, the raw material is fired through a rotary kiln after preheating and decomposition are completed, the fired clinker is rapidly cooled, the cooling is mainly aimed at rapidly recovering the clinker to normal temperature so as to facilitate subsequent continuous production and preparation, and meanwhile, heat can be recycled through cooling and heat release, so that the energy consumption required by production is low.

The clinker cooling machine mainly cools cement production clinker, the traditional clinker cooling machine synchronously completes clinker cooling in the process of conveying the clinker, the clinker sintered at the rotary kiln is directly put into the clinker cooling machine, obvious clinker accumulation problem exists, the clinker accumulation is not beneficial to realizing rapid cooling of the clinker, the traditional clinker cooling machine needs to prolong a conveying path to ensure the reduction of the clinker temperature, the whole equipment has large size and larger floor area, in addition, the traditional clinker cooling machine mostly adopts a cold air direct blowing mode to dissipate heat, and therefore more clinker particles can be mixed in discharged hot air flow.

Based on the problems, the invention provides a production process of composite portland cement, and particularly relates to a vertical cooler for composite portland cement clinker.

Disclosure of Invention

In order to solve the above problems, the present invention provides a process for producing a composite portland cement, which solves the above problems mentioned in the background art.

In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose: the production process of the composite portland cement specifically comprises the following steps:

s1, preparation of raw materials: the raw material required by cement preparation is subjected to the processing processes of pre-homogenization, blending, homogenization and grinding to complete the preparation of the raw material;

s2, clinker preparation: the clinker is prepared by processing the raw material obtained in the step S1 through preheating, decomposition, firing and cooling, and the fired clinker is cooled by a composite Portland cement vertical cooler in the cooling link;

s3, cement preparation: mixing the clinker prepared in the step S2 and gypsum according to a proportion to prepare a cement finished product, and performing moisture-proof storage on the prepared cement finished product;

the process of producing the composite portland cement by adopting the composite portland cement production process of the steps S1-S3 also specifically relates to the composite portland cement clinker vertical cooler, which comprises a cooling bin and a plurality of ventilation cooling devices vertically arranged and assembled in the cooling bin; wherein:

the ventilation cooling device comprises an air-cooled grate plate horizontally and fixedly arranged in the cooling bin and a plate sealing group mechanism assembled on the air-cooled grate plate;

the air-cooled grate plate comprises a plate frame with a rectangular structure, the plate frame is composed of two frame beams arranged in parallel and two frame plates fixedly connected between the two frame beams, the frame beams are of a rectangular rod structure, the inner cavity of the rectangular rod structure can be filled with cooling air flow, a plurality of ventilation plates horizontally and uniformly arranged along the long edge direction of the frame beams are arranged between the two frame beams, each ventilation plate is of a hollow structure, two ends of each ventilation plate are communicated with the inner cavities of the two frame beams, the ventilation plates are obliquely arranged relative to the horizontal direction, an air-cooled channel for cement clinker to pass through is reserved between every two adjacent ventilation plates, and a plurality of ventilation openings are formed in the inclined plane below the ventilation plates;

the plate sealing group mechanism is positioned below the row of the ventilating plates and assembled between the two frame plates and used for synchronously controlling the opening and closing of all the air cooling channels;

the two rows of the ventilation plates in any two adjacent ventilation cooling devices are arranged in opposite inclination directions.

Preferably, the sealing plate group mechanism comprises a driving motor fixedly mounted at the bottom end of one of the frame plates through a motor fixing plate, a cam fixed on an output shaft of the driving motor, two guide rods horizontally and fixedly mounted between the two frame plates, two sliding sleeves in one-to-one corresponding sliding fit with the two guide rods, two return springs sleeved on the two guide rods in one-to-one correspondence, a plurality of sealing plates horizontally and fixedly connected between the two sliding sleeves, and a roller vertically and rotatably mounted at the bottom end of one of the sealing plates; the two ends of the reset spring are connected between one end of the sliding sleeve and the adjacent frame plate, the number of the sealing plates is the same as that of the air cooling channels, the sealing plates are uniformly distributed along the axial direction of the guide rod, and the distribution distance is equal to that of the air cooling channels; the roller is held in rolling contact with the cam.

Preferably, the cooling bin comprises a square feeding hopper, a square cylindrical main bin body and a blanking hopper with an inverted quadrangular frustum pyramid structure from top to bottom in sequence; the plurality of ventilation cooling devices are all assembled in the main bin body, and the plate frame is in contact with the inner wall of the periphery of the main bin body.

Preferably, the inclined plane above the ventilating board is composed of an arc surface from top to bottom and an inclined plane smoothly transiting with the arc surface.

Preferably, the vent is long limit to two the long rectangular hole structure that the frame roof beam direction extends, and a plurality of the vent is followed the linear evenly distributed of ventilating board incline direction.

Preferably, a feeding grid plate is horizontally arranged in the feeding hopper, grid plate holes of the feeding grid plate are long-rectangular, and a plurality of grid plate holes are uniformly arranged along the arrangement direction of the ventilating plate.

Preferably, the main bin body and two of the plate frames, two of which are in contact with the plate frames, are provided with heat dissipation channels protruding outwards on the bin walls, the heat dissipation channels are communicated with air outlets, the heat dissipation channels span all the ventilation cooling devices, and the air outlets are positioned above the ventilation cooling devices at the topmost positions.

Preferably, a plurality of layers of filter screen plates are arranged in the air outlet.

Preferably, air inlets are formed in two ends of the frame beam in the extending direction of the long edge.

The technical scheme has the following advantages or beneficial effects:

1. the invention provides a production process of composite portland cement, and particularly relates to a vertical cooling machine for clinker of the composite portland cement.

2. The invention provides a production process of composite portland cement, and particularly relates to a vertical cooling machine for composite portland cement clinker, which adopts a cooling bin structure, and a plurality of ventilation cooling devices are vertically arranged in the cooling bin, so that the overall structure is compact, the occupied space is small, the clinker can fall and circulate in the cooling bin through the ventilation cooling devices, the required cooling effect of the clinker can be achieved through multi-stage cooling on the premise of not influencing the circulation and transportation of the clinker, the clinker falls in the ventilation cooling devices and dispersedly enters a plurality of air cooling channels, on one hand, the clinker blanking accumulation is avoided, the heat dissipation effect is ensured, on the other hand, the air cooling can be carried out in a short distance in the inclined semi-closed air cooling channels, and the excessive clinker particles can be effectively reduced from being mixed in hot air flow.

3. The invention provides a production process of composite portland cement, and particularly relates to a vertical cooler for composite portland cement clinker.

Drawings

The invention and its features, aspects and advantages will become more apparent from reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings. The drawings, in which like numerals refer to like parts throughout the several views and which are not necessarily drawn to scale, emphasis instead being placed upon illustrating the principles of the invention.

FIG. 1 is a process flow diagram of a composite portland cement production process provided by the present invention;

FIG. 2 is a schematic perspective view of a composite portland cement clinker vertical cooler according to the present invention, with a partial cross-sectional view;

FIG. 3 is a schematic view of a half-section structure of a vertical cooler for composite portland cement clinker provided by the invention;

FIG. 4 is an enlarged partial schematic view at A of FIG. 3;

FIG. 5 is a schematic perspective view of the ventilated cooling apparatus from a first perspective;

FIG. 6 is a perspective view of the ventilated cooling apparatus from a second perspective;

FIG. 7 is a schematic perspective view, partially in section, of the ventilated cooling apparatus;

FIG. 8 is an enlarged partial schematic view at B of FIG. 7;

fig. 9 is a partially enlarged schematic view at C in fig. 7.

In the figure: 01. a cooling bin; 1. a feed hopper; 11. a feeding grate plate; 2. a main bin body; 21. a heat dissipation channel; 22. an air outlet; 221. a filter screen plate; 3. a blanking hopper; 02. a ventilation cooling device; 4. an air-cooled grate plate; 41. a plate frame; 411. a frame beam; 4111. an air inlet; 412. a frame plate; 42. a ventilation board; 421. a vent; 5. a plate sealing group mechanism; 51. a drive motor; 52. a cam; 53. a guide bar; 54. a sliding sleeve; 55. a return spring; 56. closing the plate; 57. and a roller.

Detailed Description

The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings for the purpose of providing those skilled in the art with a more complete, accurate and thorough understanding of the concept and technical solution of the present invention, and to facilitate the implementation thereof, but not to limit the present invention.

Referring to the attached drawings 1-9, the production process of the composite portland cement specifically comprises the following steps:

the process of producing the composite portland cement by adopting the composite portland cement production process of the steps S1-S3 also specifically relates to the composite portland cement clinker vertical cooler, which comprises a cooling bin 01 and six ventilating and cooling devices 02 vertically arranged and assembled in the cooling bin 01;

the cooling bin 01 is composed of a square feed hopper 1, a square cylindrical main bin body 2 and a blanking hopper 3 with an inverted quadrangular frustum pyramid structure from top to bottom in sequence; the feeding hopper 1 is internally and horizontally provided with a feeding grid plate 11, grid plate holes of the feeding grid plate 11 are in a long rectangular shape, a plurality of grid plate holes are uniformly arranged along the arrangement direction of the ventilating plates 42, the fired clinker is put into the feeding hopper 1 at the position of the rotary kiln, the clinker is uniformly dispersed and discharged in the feeding hopper 1 through the feeding grid plate 11, and the grid plate holes uniformly arranged along the arrangement direction of the ventilating plates 42 can correspondingly drop the clinker in each air cooling channel in the topmost ventilating and cooling device 02.

The six ventilation cooling devices 02 are all assembled in the main bin body 2, and each ventilation cooling device 02 comprises an air-cooled grate plate 4 horizontally and fixedly installed in the cooling bin 01 through bolts and a plate sealing group mechanism 5 assembled on the air-cooled grate plate 4;

the air-cooled grate plate 4 comprises a plate frame 41 with a rectangular structure, the plate frame 41 is in contact with the peripheral inner wall of the main bin body 2, the plate frame 41 comprises two frame beams 411 arranged in parallel and two frame plates 412 welded between the two frame beams 411, the frame beams 411 are of a rectangular rod structure with an inner cavity into which cooling air can be introduced, air inlets 4111 are arranged at two ends of the extending direction of the long edge of each frame beam 411, a plurality of ventilating plates 42 horizontally and uniformly arranged along the long edge direction of the frame beams 411 are arranged between the two frame beams 411, each ventilating plate 42 is of a hollow structure, two ends of each ventilating plate are communicated with the inner cavities of the two frame beams 411, each ventilating plate 42 is obliquely arranged relative to the horizontal direction, an air-cooled channel through which cement clinker passes is reserved between the two adjacent ventilating plates 42, an inclined plane above the ventilating plate 42 is formed by an arc surface from top to bottom and an inclined plane smoothly transiting to the arc surface (ensuring that the falling clinker can normally slide along the arc surface and the inclined plane, thereby ensuring smooth circulation of clinker in the air cooling channel), a plurality of ventilation openings 421 are arranged on the inclined plane on the upper and lower part of the ventilation plate 42, the ventilation openings 421 are in a long rectangular hole structure with the long side extending to the direction of the two frame beams 411, and the ventilation openings 421 are linearly and uniformly distributed along the inclined direction of the ventilation plate 42 (ensuring that the clinker in the whole air cooling channel can be uniformly air-cooled); the two rows of ventilation plates 42 in any two adjacent ventilation cooling devices 02 are arranged in opposite inclination directions;

in the ventilation cooling device 02, air pipes are required to be connected at air inlets 4111 of two frame beams 411 and led out from a main bin body 2, in the process of cooling clinker, cooling air is introduced into inner cavities of the two frame beams 411 from the air pipes through an air blower assembled and connected externally, air flow enters the inner cavity of each ventilation plate 42 and is exhausted from a ventilation opening 421, the clinker falling into an air cooling channel slides along an inclined plane above one ventilation plate 42, meanwhile, cooling air exhausted from a plurality of ventilation openings 421 on the other ventilation plate 42 carries out air cooling on the clinker, the clinker falling out of a feed hopper 1 enters each air cooling channel at the ventilation cooling device 02, so that ordered dispersion of the clinker is realized, the clinker is rapidly cooled, in addition, the cooling time is prolonged as the clinker slides along the inclined plane in the air cooling channel, and the clinker is directly blown in a short distance in the semi-hidden air cooling channel by the inclined cooling air, so that the clinker is guaranteed And the air cooling effect also avoids that the cooling air blows excessive clinker powder to the upward floating exhaust air flow to ensure the continuous falling of the clinker.

The plate sealing group mechanism 5 is positioned below the row of ventilation plates 42 and is assembled between the two frame plates 412 and used for synchronously controlling the opening and closing of all air cooling channels; the plate sealing set mechanism 5 comprises a driving motor 51 fixedly mounted at the bottom end of one of the frame plates 412 through a motor fixing plate, a cam 52 fixed on an output shaft of the driving motor 51, two guide rods 53 horizontally welded between the two frame plates 412, two sliding sleeves 54 in one-to-one corresponding sliding fit with the two guide rods 53, two return springs 55 sleeved on the two guide rods 53 in one-to-one correspondence, a plurality of sealing plates 56 horizontally welded between the two sliding sleeves 54, and a roller 57 vertically and rotatably mounted at the bottom end of one of the sealing plates 56; two ends of the return spring 55 are welded between one end of the sliding sleeve 54 and the adjacent frame plate 412, the number of the sealing plates 56 is the same as that of the air cooling channels, the sealing plates 56 are uniformly distributed along the axial direction of the guide rod 53, the distribution distance is equal to that of the air cooling channels, and the width of the sealing plates 56 is larger than the horizontal width of the air cooling channels at the bottom end; the roller 57 is held in rolling contact with the cam 52.

In the process of cooling clinker, the driving motor 51 keeps a starting state, the driving motor 51 drives the cam 52 to rotate after being started, the two sliding sleeves 54 synchronously slide back and forth along the guide rods 53 which are respectively in sliding fit under the pushing of the roller 57 in the rotating process of the cam 52 and the elastic return fit of the two return springs 55, the sealing plates 56 connected between the two sliding sleeves 54 synchronously and linearly reciprocate along with the sliding sleeves, then each air cooling channel is repeatedly closed and opened along with the moving process of the sealing plates 56, and the intermittent blanking of the clinker in the air cooling channel can be realized, so that the remaining cooling time of the clinker in the air cooling channel can be prolonged, and the heat of the clinker can be rapidly discharged along with air flow; the clinker in the main bin body 2 sequentially passes through six ventilation cooling devices 02 to realize multi-stage cooling, so that the clinker can be rapidly quenched to achieve the purpose of effective cooling.

In addition, the two rows of ventilation plates 42 in the two ventilation cooling devices 02 in adjacent positions are arranged in opposite inclined directions for the purpose of: because the clinker is inclined and slides down through the air cooling channel, in order to avoid the clinker from accumulating because the clinker is concentrated and deflected to one side through the six ventilation cooling devices 02 in sequence, the six ventilation cooling devices 02 are sequentially installed in an installation mode of exchanging adjacent positions, and the influence is eliminated.

The two walls of the main cabin body 2 contacting with the two frame plates 412 in the plate frame 41 are provided with heat dissipation channels 21 protruding outwards, the heat dissipation channels 21 are communicated with air outlets 22, the heat dissipation channels 21 span all the ventilation cooling devices 02, the air outlets 22 are positioned above the ventilation cooling devices 02 at the topmost position, and the air outlets 22 are internally provided with a plurality of layers of filter screens 221.

After the clinker is cooled at the plurality of ventilation cooling devices 02, a large amount of heat is released, the heat flows upwards along the heat dissipation channel 21 and is discharged and recovered from the air outlet 22, and the clinker powder mixed in the heat flow can be filtered by the multi-layer filter screen plates 221.

Those skilled in the art will appreciate that variations may be implemented by those skilled in the art in combination with the prior art and the above-described embodiments, and will not be described in detail herein. Such variations do not affect the essence of the present invention and are not described herein.

The above description is of the preferred embodiment of the invention. It is to be understood that the invention is not limited to the particular embodiments described above, in that devices and structures not described in detail are understood to be implemented in a manner common in the art; it will be understood by those skilled in the art that various changes and modifications may be made, or equivalents may be modified, without departing from the spirit of the invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.

Claims

1. The production process of the composite portland cement is characterized by comprising the following steps of: the production process specifically comprises the following steps:

the process of producing the composite portland cement by adopting the composite portland cement production process of the steps S1-S3 also particularly relates to the composite portland cement clinker vertical cooler, which comprises a cooling bin (01) and a plurality of ventilation cooling devices (02) vertically arranged and assembled in the cooling bin (01); wherein:

the ventilation cooling device (02) comprises an air-cooling grate plate (4) horizontally and fixedly arranged in the cooling bin (01) and a plate sealing group mechanism (5) assembled on the air-cooling grate plate (4);

the air-cooled grate plate (4) comprises a plate frame (41) with a rectangular structure, the plate frame (41) is composed of two frame beams (411) which are arranged in parallel and two frame plates (412) which are fixedly connected between the two frame beams (411), the frame beams (411) are of a rectangular rod structure, the inner cavities of the rectangular rod structure can be filled with cooling air, a plurality of ventilation plates (42) which are horizontally and uniformly arranged along the long edge direction of the frame beams (411) are arranged between the two frame beams (411), the ventilation plates (42) are of a hollow structure, two ends of each ventilation plate are communicated with the inner cavities of the two frame beams (411), the ventilation plates (42) are obliquely arranged relative to the horizontal direction, an air-cooled channel for cement clinker to pass through is reserved between the two adjacent ventilation plates (42), and a plurality of ventilation openings (421) are formed in inclined planes on the upper and lower portions of the ventilation plates (42);

the plate sealing group mechanism (5) is positioned below a row of the ventilating plates (42) and is assembled between the two frame plates (412) for synchronously controlling the opening and closing of all the air cooling channels;

the two rows of the ventilation plates (42) in any two adjacent ventilation cooling devices (02) are arranged in opposite inclination directions.

2. The process for producing a composite portland cement according to claim 1, wherein: the plate sealing set mechanism (5) comprises a driving motor (51) fixedly mounted at the bottom end of one of the frame plates (412) through a motor fixing plate, a cam (52) fixed on an output shaft of the driving motor (51), two guide rods (53) horizontally and fixedly mounted between the two frame plates (412), two sliding sleeves (54) in one-to-one corresponding sliding fit with the two guide rods (53), two return springs (55) sleeved on the two guide rods (53) in one-to-one correspondence, a plurality of sealing plates (56) horizontally and fixedly connected between the two sliding sleeves (54) and a roller (57) vertically and rotatably mounted at the bottom end of one of the sealing plates (56); two ends of the return spring (55) are connected between one end of the sliding sleeve (54) and the adjacent frame plate (412), the number of the sealing plates (56) is the same as that of the air cooling channels, the sealing plates (56) are axially and uniformly distributed along the guide rod (53), and the distribution distance is equal to that of the air cooling channels; the roller (57) is held in rolling contact with the cam (52).

3. The process for producing a composite portland cement according to claim 1, wherein: the cooling bin (01) is sequentially provided with a square feed hopper (1), a square cylindrical main bin body (2) and a blanking hopper (3) with an inverted quadrangular frustum pyramid structure from top to bottom; the plurality of ventilation cooling devices (02) are all assembled in the main cabin body (2), and the plate frame (41) is in contact with the peripheral inner wall of the main cabin body (2).

4. The process for producing a composite portland cement according to claim 1, wherein: the inclined plane of the upper part of the ventilating plate (42) is composed of an arc surface from top to bottom and an inclined plane smoothly transited with the arc surface.

5. A composite portland cement manufacturing process according to any one of claims 1 and 4, wherein: vent (421) are long edge direction two the long rectangular hole structure that frame roof beam (411) direction extends, and a plurality of vent (421) are followed the linear evenly distributed of ventilating board (42) incline direction.

6. The process for producing a composite portland cement according to claim 3, wherein: the feeding device is characterized in that a feeding grid plate (11) is horizontally arranged in the feeding hopper (1), grid plate holes of the feeding grid plate (11) are long-rectangular, and a plurality of grid plate holes are uniformly arranged along the arrangement direction of the ventilating plate (42).

7. The process for producing a composite portland cement according to claim 3, wherein: on the main storehouse body (2) with in sheet frame (41) two of frame board (412) contact all be provided with outside outstanding heat dissipation channel (21) on the bulkhead, the intercommunication is provided with air exit (22) on heat dissipation channel (21), all is strideed across in heat dissipation channel (21) ventilation cooling device (02), air exit (22) are located topmost position ventilation cooling device (02)'s top.

8. The process for producing a composite portland cement according to claim 7, wherein: and a plurality of layers of filter screen plates (221) are arranged in the air outlet (22).

9. The process for producing a composite portland cement according to claim 1, wherein: and air inlets (4111) are formed in the two ends of the frame beam (411) in the extending direction of the long edge.