Vertical cement clinker pneumatic particle classification cooler and cooling method

Abstract

The present invention belongs to the field of cement sintering equipment, and specifically relates to a vertical cement clinker pneumatic particle grading cooler and cooling method. The upper layer of the cooler is a kiln door cover; the end of the kiln door cover away from the rotary kiln is a fine particle settling chamber; the middle layer of the cooler is a coarse material cooling zone located below the rotary kiln drop point and a fine material cooling zone located below the fine particle settling chamber; a coarse material side air inlet is provided on one side of the bottom of the coarse material cooling zone, and a particle grading air duct facing the fine particle settling chamber is provided on the top of the coarse material cooling zone; a secondary cooling zone for re-cooling the dropped materials in the coarse material cooling zone and the fine material cooling zone is provided on the lower layer of the cooler, and the secondary cooling zone includes a plurality of ash hoppers for material discharge arranged at the bottom of the cooler. The present invention realizes the classification and cooling of clinker separately, and can achieve a good gas-solid heat exchange effect. The clinker material layer resistance can be reduced by particle size classification, and energy saving and consumption reduction can be achieved; a good clinker cooling effect is achieved by cooling the clinker twice from top to bottom.

Description

Technical Field

[0001] The invention relates to the field of cement burning equipment, and in particular to a vertical cement clinker pneumatic particle classification cooler and a cooling method. Background Art

[0002] Cooler is a commonly used cooling equipment in cement burning system. At present, the industry mainly uses horizontal coolers. However, the existing horizontal coolers do not separate the coarse and fine particles. The heat exchange between airflow and solid is carried out through local countercurrent heat exchange. At the same time, the horizontal cooler requires a large amount of cooling air and high power consumption. In addition, only the hot air from the first three air chambers returns to the burning system, and the heat recovery efficiency is low.

[0003] On the other hand, the existing vertical cooler achieves heat exchange by vertically stacking clinker downward and counter-currently moving with the upward cooling air, which greatly improves the efficiency of gas-solid heat exchange, reduces the air volume used by the cooler, and reduces heat and power consumption; however, there are also the following problems:

[0004] 1) In order to improve the quality of cement, the clinker out of the rotary kiln needs to be rapidly cooled; in the upper space of the vertical cooler, the clinker out of the kiln exchanges heat with high-temperature air (above 600°C), and the rapid cooling effect of the clinker out of the kiln is difficult to achieve;

[0005] 2) The material resistance of vertical stacking is relatively large. According to experimental data and field tests, every 100mm of clinker will bring about 800Pa of air resistance. If the clinker thickness is above 1.5m, an air pressure of 12000Pa is required, which does not include the resistance of grate plates, roller crushers and other equipment. Excessive resistance will lead to increased power consumption, which is inconsistent with the original intention of setting up vertical cooling. Therefore, most vertical coolers remain at the theoretical calculation stage, and there are no successful industrial application cases yet. Summary of the invention

[0006] In view of the above-mentioned technical problems existing in the prior art, the present invention provides a vertical cement clinker pneumatic particle grading cooler and cooling method; the specific scheme is: 1. Perform segmented air blowing, and introduce new cooling air into the upper part of the cooler to enhance the clinker rapid cooling effect; 2. Perform coarse and fine separation of clinker particles, and the resistance of coarse particle clinker in a stacked state will be greatly reduced. According to the calculation of the ergun equation, the air resistance of coarse particles will drop to about 1 / 3, and even if the stacking height of coarse particles reaches 2m, its resistance will not exceed 10000Pa. The present invention can greatly reduce the air volume used in the cooler, while ensuring that the clinker temperature out of the cooler is within 100°C, so as to achieve the purpose of reducing the power consumption of firing. Low air volume means that the air temperature increases after cooling, which improves the heat recovery efficiency and can reduce the system heat consumption or convert waste heat into power generation.

[0007] In order to achieve the above object, the present invention adopts the following technical solution:

[0008] A vertical cement clinker pneumatic particle classification cooler, the upper layer of the cooler is a kiln door cover; one side of the kiln door cover is connected to the rotary kiln and the tertiary air duct; the tertiary air duct is connected to the decomposition furnace; the end of the kiln door cover away from the rotary kiln is a fine particle settling chamber;

[0009] The middle layer of the cooler is a coarse material cooling zone located below the drop point of the rotary kiln and a fine material cooling zone located below the fine particle settling chamber; the bottom of the fine material cooling zone includes a plurality of fine material side air inlets; a coarse material side air inlet is provided on one side of the bottom of the coarse material cooling zone, and a particle classification air duct facing the fine particle settling chamber is provided on the top of the coarse material cooling zone; the coarse material cooling zone and the fine material cooling zone are separated by an isolation cooling wall vertically arranged in the cooler;

[0010] A secondary cooling zone is provided at the lower layer of the cooler for re-cooling the materials discharged from the coarse material cooling zone and the fine material cooling zone. The secondary cooling zone includes a plurality of discharge ash hoppers provided at the bottom of the cooler. The discharge ash hoppers eventually collect the cooled clinker into the zipper machine below the cooler.

[0011] Furthermore, the particle classification air duct is an inclined hot air channel with a certain length; the particle classification air duct is built with a plurality of inclined partitions to blow the heat-exchanged air and small-particle clinker into the fine particle settling chamber; the angle between the particle classification air duct and the partition and the vertical direction is 30 to 60 degrees.

[0012] Furthermore, multiple layers of metal grilles are arranged in the coarse material cooling zone, and each layer of metal grilles includes columnar supports horizontally inserted into the upper end of the roller crusher from two adjacent sides outside the cooler; the columnar supports are hollow shell structures with multiple ventilation holes on the surface; the columnar supports are connected to an external blower, and the blower blows air into the cooler through the ventilation holes.

[0013] Furthermore, a baffle plate and a roller crusher are provided at the bottom of the coarse material cooling zone. The baffle plate and the roller crusher can cooperate to control the height of the clinker layer on the coarse material side and crush the cooled coarse particle clinker at the same time. The roller crushers are arranged in multiple pairs, and each pair of roller crushers has a baffle plate on both sides to guide the coarse material into the roller gap.

[0014] Furthermore, a fine material rod valve or gate valve for supporting fine materials is provided at the bottom of the fine material cooling zone; a discharge orifice plate is provided below the fine material rod valve, and a plurality of discharge holes are evenly opened on the discharge orifice plate along the thickness direction. The cooled fine material passes through the rod valve discharge orifice plate and enters the secondary cooling zone.

[0015] Furthermore, the gap between two partitions close to the isolation cooling wall is more than 800 mm, and the gap between other adjacent partitions is between 300 and 500 mm; and along the direction from the rotary kiln drop point to the isolation cooling wall, the tops of all partitions are arranged from high to low; the partition is a hollow shell structure;

[0016] And / or, the interior of the partition is made of a high-temperature resistant alloy; the exterior of the partition and the inner wall of the particle classification air duct are wrapped with a high-temperature resistant castable material.

[0017] Furthermore, the main body of the isolation cooling wall is made of high-temperature resistant nickel alloy, and the outside of the wall is wrapped with castables for heat preservation and high-temperature protection.

[0018] Furthermore, the coarse material side air inlet and / or the fine material side air inlet enter the cooler at an angle of 40 to 50 degrees downward, which can prevent the material from entering the air duct.

[0019] Furthermore, a lower cooling air inlet is provided at the bottom of each material discharge hopper, and a lower cooling air outlet is provided above the material discharge hopper, and the cooling air outlet is arranged on one side of the coarse material particles.

[0020] Furthermore, the cooling method of the vertical cement clinker pneumatic particle classification cooler comprises the following steps:

[0021] S1. The clinker fired in the rotary kiln enters the particle classification air duct through the kiln door cover. The hot air blown out of the classification air duct will generate a horizontal speed, sweeping most of the selected small particles to the fine particle settling chamber behind the kiln door cover. After settling, the fine particles enter the fine material cooling zone below, and most of the large-size particles fall into the coarse material cooling zone below the air duct through the classification air duct for cooling;

[0022] S2. Nearly 80% of the clinker is accumulated in the coarse material cooling zone and undergoes countercurrent heat exchange with the incoming cold air; the cooled coarse particles are crushed into smaller particles by a roller crusher and enter the secondary cooling zone; at the same time, the powder entering the fine material cooling zone is cooled by the air blown in from the fine material side air inlet, and the cooled fine particles fall into the secondary cooling zone.

[0023] S3, the coarse and fine clinkers after primary cooling are cooled again in the secondary cooling zone, and the final clinker temperature is controlled within 100°C and discharged to the external zipper machine through the unloading ash hopper;

[0024] S4. The high-temperature hot air that has completed heat exchange in the cooler rises and passes through the kiln door cover and is divided into two parts. One part enters the rotary kiln as secondary air as combustion-supporting air for fuel combustion in the kiln, and the other part enters the tertiary air duct as tertiary air and is sent to the decomposition furnace as combustion-supporting air for fuel combustion in the decomposition furnace.

[0025] The advantages and positive effects of the present invention are:

[0026] The particle size distribution range of cement clinker is 0.1-500mm, of which particles with a size of more than 10mm account for 60-80%, and the larger the particle size, the more difficult it is to cool the clinker. The present invention proposes a method for grading the particle size of clinker particles by using hot air after heat exchange to purge the clinker out of the kiln, which can achieve particle size grading of clinker particles out of the kiln and cool them separately, which can achieve a good heat exchange effect and reduce the resistance of the clinker layer, thereby achieving the purpose of energy saving and consumption reduction;

[0027] The vertical cooler of the present invention also cools the clinker twice from top to bottom, and finally the temperature of the clinker out of the cooler is controlled within 100°C, with good cooling effect;

[0028] The high-temperature hot air that has completed heat exchange in the cooler rises and passes through the kiln door cover and is divided into two parts. One part enters the rotary kiln as secondary air as combustion-supporting air for fuel combustion in the kiln, and the other part enters the tertiary air duct as tertiary air and is sent to the decomposition furnace as combustion-supporting air for fuel combustion in the decomposition furnace, with high heat recovery efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a front view of a cooling machine in a preferred embodiment of the present invention;

[0030] Figure 2 It is a three-dimensional diagram of the cooling machine in the preferred embodiment of the present invention.

[0031] Among them: 1. Rotary kiln; 2. Tertiary air duct; 3. Kiln door cover; 31. Fine particle settling chamber; 4. Fine material cooling zone; 41. Fine material rod valve; 42. Discharge orifice plate; 43. Fine material side air inlet; 5. Coarse material cooling zone; 51. Partition; 52. Coarse material side air inlet; 53. Material baffle; 54. Roller crusher; 55. Metal grille; 6. Isolation cooling wall; 7. Discharge ash hopper; 71. Lower cooling air inlet; 72. Lower cooling air outlet. DETAILED DESCRIPTION

[0032] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0033] like Figure 1 to Figure 2As shown, the present invention discloses a vertical cement clinker pneumatic particle classification cooler, the particle size distribution range of cement clinker is 0.1-500mm, among which the particles with a coarse particle size of more than 10mm account for 60-80%, the upper layer of the cooler is a kiln door cover 3; one side of the kiln door cover 3 is connected to the rotary kiln 1 and the tertiary air duct 2; the tertiary air duct 2 is connected to the decomposition furnace; the temperature of the clinker after calcination in the rotary kiln is generally about 1400°C, and it falls into the cooler after being discharged through the kiln door cover 3; the high-temperature hot air after heat exchange in the cooler rises and passes through the kiln door cover 3 and is divided into two parts, one part of which enters the rotary kiln as secondary air as combustion-supporting air for fuel combustion in the kiln, and the other part as The tertiary air enters the tertiary air duct and is sent to the decomposition furnace as the combustion-supporting air for the fuel combustion in the decomposition furnace; the hot air entering the kiln door cover 3 from the cooler upward carries the clinker fine particles separated by particle size. In order to collect the fine particles in the hot air, a larger fine particle settling chamber 31 is provided at the end of the kiln door cover 3 away from the rotary kiln. The fine particles in the hot air settle down to the fine material cooling zone 4 in the middle layer of the cooler; one side of the fine material cooling zone 4 is the coarse material cooling zone 5, and the two are separated by an isolation cooling wall 6; specifically, the isolation cooling wall 6 is arranged in the middle of the cooler, and is horizontally passed through the internal space of the cooler in the form of warm metal plus castable protection, thereby separating the coarse and fine material cooling zones 4. The main body of the isolation cooling wall is made of high-temperature resistant nickel alloy, and the castable is wrapped on the outside of the wall for heat preservation and high-temperature protection.

[0034] After the particle size classification, most of the clinker particles larger than 10 mm are accumulated in the coarse material cooling zone 5 for cooling. The coarse material cooling zone 5 is arranged below the drop point of the rotary kiln 1. The coarse material cooling zone 5 includes a particle classification air duct connected to the upper layer of the cooler and facing the fine particle settling chamber 31; the inner wall of the particle classification air duct is covered with high temperature resistant casting material; specifically, the air duct blows the hot air after heat exchange obliquely backward into the fine particle settling chamber 31 through a number of inclined partitions 51, and blows a part of the small-sized clinker particles falling from the kiln door cover 3 to the direction of the fine material cooling zone 4, while the relatively large-sized clinker particles fall downward to the coarse particle cooling zone through the classification air duct, thereby realizing the clinker particle size classification. Preferably, the thickness of the partition 51 is about 200 mm, and the angle between the partition 51 and the vertical direction is 30 to 60°; in addition, the partition 51 is a hollow shell structure, the interior is made of high-temperature resistant alloy, and the exterior is wrapped with castable material to reduce clinker wear; further, the gap between the two partitions 51 close to the isolation cooling wall 6 is more than 800 mm, and the gap between the remaining adjacent partitions 51 is between 300 and 500 mm; and along the direction from the rotary kiln drop point to the isolation cooling wall 6, the tops of all partitions 51 are arranged from high to low, forming a slope that is conducive to the rolling of large pieces of material; when a super-large piece of material with a particle size exceeding 500 mm enters the cooler, it can roll to the largest gap of the partition 51 and then fall into the coarse material cooling zone 5.

[0035] The bottom of the coarse material cooling zone 5 also includes a coarse material side air inlet 52 arranged on the side of the zone, so as to perform primary cooling on the coarse material after screening. The coarse material side air inlet 52 is arranged on both sides of the coarse material cooling zone 5 and the front of the cooler (seen from the direction of the rotary kiln), and enters the coarse material cooling zone 5 obliquely downward.

[0036] A baffle plate 53 and a roller crusher 54 are provided at the bottom of the coarse material cooling zone 5, which cooperate to crush the coarse clinker particles after primary cooling, and at the same time control the stacking height of the coarse material cooling zone 5 through the gap of the roller press. It is generally required that the clinker particles after crushing by the roller crusher 54 are less than 10mm. Preferably, 2-3 pairs of roller crushers 54 are provided at the bottom of the coarse material cooling zone 5, and a baffle plate 53 is provided on both sides of each pair of roller crushers 54 to guide the coarse material into the roller gap.

[0037] In the coarse material cooling zone 5, large-particle clinker passes through the grading air duct under the action of gravity, accumulates in the coarse particle cooling zone and slowly flows downward through the roller gap between the roller crushers 54, and then enters the bottom of the cooler; the accumulation height of the large-particle clinker layer in the coarse material cooling zone 5 is about 2 to 2.5 meters, the weight is about 180 tons, the residence time is about 30 minutes, and countercurrent heat exchange is carried out with the upward moving cooling air. In order to reduce the load-bearing load of the roller crusher 54, 4 to 6 layers of metal grilles 55 are also arranged in the coarse material cooling zone 5, and each layer of metal grilles 55 includes a columnar support horizontally inserted into the upper end of the roller crusher 54 from the adjacent two sides outside the cooler; the columnar support is a hollow shell structure, and a plurality of ventilation holes are evenly arranged on its surface; the inner side of the columnar support is connected to the blower outside the cooler; the hollow columnar support can evenly distribute the cooling air entering its interior in the clinker through the ventilation holes, which plays a role in air volume homogenization, or evenly pass the cooling air directly into the material through the grille pillars. The gap distance between adjacent columnar supports is 300 mm or more, which can increase the porosity of the clinker and serve as a support for the clinker load, reducing the pressure of the clinker on the roller press.

[0038] The fine material cooling zone 4 is used to cool the fine material with a particle size less than 10mm in the kiln clinker. The fine particle clinker exchanges heat with the cooling air in the reverse motion in the stacked state. The fine material stacking height is about 500-800mm, and the residence time of the fine material in the fine material cooling zone 4 is about 20min. The bottom of the fine material cooling zone 4 is provided with a fine material rod valve 41 (or gate valve) supporting the fine material. The stacking height of the fine material zone is adjusted by the opening of the fine material rod valve 41. The insertion depth of the rod valve and the number of inserted roots can change the feeding speed of the fine material. Preferably, it also includes a feeding orifice plate 42 arranged 20-50mm below the fine material rod valve. The fine material falls into the lower layer of the cooler through the feeding orifice plate 42. The feeding orifice plate 42 cooperates with the fine material rod valve or gate valve to jointly control the feeding speed of the fine material. The feeding orifice plate 42 is a steel plate with a fixed-size feeding hole opened along the thickness direction. The cooled fine material passes through the feeding orifice plate 42 and enters the secondary cooling zone of the lower layer.

[0039] In addition, the upper edge of the isolation cooling wall 6 is connected to the particle classification air duct, and the lower edge is connected to the roller crusher 54 and the discharge orifice plate 42.

[0040] In addition, the bottom of the fine material cooling zone 4 includes a plurality of fine material side air inlets 43 distributed on both sides and the back of the cooler (seen from the direction of the rotary kiln), through which room temperature air is introduced to perform primary cooling of the fine material side material. The air duct inlet is arranged to be inclined downward at 40 to 50 degrees to enter the fine material cooling zone 4, which can prevent the material from entering the kiln door cover 3 or the coarse material cooling zone 5 with the wind, and at the same time, a downward velocity component can be given to the incoming cooling air, thereby increasing the gas-material heat exchange time.

[0041] A secondary cooling zone is provided at the lower layer of the cooler for recooling the materials discharged from the coarse material cooling zone 5 and the fine material cooling zone 4. The secondary cooling zone includes a material discharge hopper 7 provided at the bottom of the cooler. The material discharge hopper 7 finally collects the cooled clinker into the zipper machine below the cooler. Preferably, four evenly arranged inverted conical material discharge hoppers 7 are provided at the bottom of the cooler;

[0042] The four ash hoppers 7 are all provided with lower cooling air inlets 71 to cool the clinker accumulated at the ash hoppers 7, further reduce the discharge temperature of the cooler, and maintain it at about 100°C; the upper end of the ash hopper 7 is provided with a lower cooling air outlet 72, which is used to discharge the cooling air after secondary cooling out of the cooler and send it to the waste heat boiler or directly into the kiln head exhaust gas treatment equipment. Preferably, the cooling air outlet is set on the side of the coarse material particles to prevent the cooling air from hindering the fine material from falling.

[0043] The cooling method of the vertical cement clinker pneumatic particle classification cooler comprises the following steps:

[0044] 1. The clinker fired in the rotary kiln falls into the coarse material cooling zone 5 through the kiln door cover 3. The hot air blown out of the graded air duct has a working temperature of about 3-5 m / s, and will generate a lateral speed, so that most of the particles below 10 mm are blown to the fine particle settling chamber 31 behind the kiln door cover 3. The wind speed in the fine particle settling chamber 31 is about 1 m / s, which can ensure that the fine particles are settled to the fine material cooling zone 4 below. Most of the large-size particles above 10 mm fall into the coarse material cooling zone 5 below the air duct for cooling;

[0045] The coarse material cooling zone 5 is the main area for clinker cooling, with a cooling air volume of about 0.4-0.7Nm3 / kgcl. Nearly 80% of the clinker is accumulated in this area for countercurrent heat exchange with the incoming cold air; the coarse particle clinker after heat exchange is about 300-400℃, and the air after heat exchange reaches 1150-1250℃; the stacking height of the coarse material cooling zone 5 is about 1.5-2.5m. Since the coarse particles have a large relative porosity, the overall resistance is small, about 8000-10000Pa gas resistance;

[0046] The high-temperature hot air that has completed heat exchange in the cooler rises and passes through the kiln door cover 3 and is divided into two parts. One part enters the rotary kiln as secondary air as combustion air for fuel combustion in the kiln, and the other part enters the tertiary air duct as tertiary air and is sent to the decomposition furnace as combustion air for fuel combustion in the decomposition furnace.

[0047] 2. The coarse particles after cooling are crushed into smaller particles by the roller crusher 54 and enter the secondary cooling zone. The roller crusher 54 can control the final particle size of the clinker and the stacking height of the coarse material cooling zone 5; as a resistance source, the roller crusher 54 can prevent the primary cooling zone and the secondary cooling zone from being blown away;

[0048] 3. Most of the fine powder entering the cooling zone 4 behind the cooler is less than 10mm, with a stacking height of about 400-600mm. It is cooled by blowing in 0.2-0.3Nm3 / kgcl of air. After cooling, the fine particles fall into the secondary cooling zone;

[0049] 4. After the primary cooling, the coarse and fine clinkers are cooled again in the secondary cooling zone, and the temperature is controlled within 100°C, and finally discharged to the external zipper machine through the unloading ash hopper 7. Preferably, the four unloading ash hoppers 7 share one air cooler, and the cooling air volume of the air cooler for the entire unloading ash hopper 7 can reach 0.4-0.5Nm3 / kgcl.

[0050] The embodiments of the present invention are described in detail above, but the contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of application of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A vertical cement clinker pneumatic particle classification cooler, characterized in that: The upper layer of the cooler is a kiln door cover; one side of the kiln door cover is connected to the rotary kiln and the tertiary air duct; the tertiary air duct is connected to the decomposition furnace; the end of the kiln door cover away from the rotary kiln is a fine particle settling chamber; The middle layer of the cooler is a coarse material cooling zone located below the drop point of the rotary kiln and a fine material cooling zone located below the fine particle settling chamber; the bottom of the fine material cooling zone includes a plurality of fine material side air inlets; a coarse material side air inlet is provided on one side of the bottom of the coarse material cooling zone, and a particle classification air duct facing the fine particle settling chamber is provided on the top of the coarse material cooling zone; the coarse material cooling zone and the fine material cooling zone are separated by an isolation cooling wall vertically arranged in the cooler; A secondary cooling zone is provided at the lower layer of the cooler for recooling the materials discharged from the coarse material cooling zone and the fine material cooling zone. The secondary cooling zone includes a plurality of material discharge hoppers provided at the bottom of the cooler. The material discharge hoppers finally collect the cooled clinker into the zipper machine below the cooler. The particle classification air duct is an inclined hot air channel with a certain length; the particle classification air duct is built with a plurality of inclined partitions to blow the air after heat exchange and small particle clinker into the fine particle settling chamber; the angle between the particle classification air duct and the partition and the vertical direction is 30~60°.

2. The vertical cement clinker pneumatic particle classification cooler according to claim 1, characterized in that: Multiple layers of metal grilles are also arranged in the coarse material cooling zone. Each layer of metal grilles includes columnar supports horizontally inserted into the upper end of the roller crusher from the adjacent two sides outside the cooler. The columnar supports are hollow shell structures with multiple ventilation holes on the surface. The columnar supports are connected to an external blower, and the blower blows air into the cooler through the ventilation holes.

3. The vertical cement clinker pneumatic particle classification cooler according to claim 1, characterized in that: A baffle plate and a roller crusher are provided at the bottom of the coarse material cooling zone. The baffle plate and the roller crusher can control the height of the clinker layer on the coarse material side and crush the cooled coarse particle clinker at the same time. The roller crushers are arranged in multiple pairs, and a baffle plate is provided on both sides of each pair of roller crushers to guide the coarse material into the roller gap.

4. The vertical cement clinker pneumatic particle classification cooler according to claim 1, characterized in that: A fine material rod valve or gate valve for supporting fine materials is provided at the bottom of the fine material cooling zone, and a discharge orifice plate is provided below the fine material rod valve. The discharge orifice plate has multiple discharge holes evenly opened along the thickness direction. The cooled fine material passes through the rod valve discharge orifice plate and enters the secondary cooling zone.

5. The vertical cement clinker pneumatic particle classification cooler according to claim 1, characterized in that: The gap between two partitions close to the isolation cooling wall is more than 800mm, and the gap between other adjacent partitions is between 300~500mm; and along the direction from the rotary kiln drop point to the isolation cooling wall, the tops of all partitions are arranged from high to low; the partition is a hollow shell structure; And / or, the interior of the partition is made of a high-temperature resistant alloy; the exterior of the partition and the inner wall of the particle classification air duct are wrapped with a high-temperature resistant castable material.

6. The vertical cement clinker pneumatic particle classification cooler according to claim 1, characterized in that: The main body of the isolation cooling wall is made of high temperature resistant nickel alloy, and the outside of the wall is wrapped with castables for heat preservation and high temperature protection.

7. The vertical cement clinker pneumatic particle classification cooler according to claim 1, characterized in that: The coarse material side air inlet and / or the fine material side air inlet enter the cooler at an angle of 40-50 degrees downward, which can prevent the material from entering the air duct.

8. The vertical cement clinker pneumatic particle classification cooler according to claim 1, characterized in that: A lower cooling air inlet is provided at the bottom of each unloading ash hopper, and a lower cooling air outlet is provided above the unloading ash hopper, and the cooling air outlet is arranged on one side of the coarse material particles.

9. The cooling method of the vertical cement clinker pneumatic particle classification cooler according to any one of claims 1 to 8, characterized in that: The steps include: S1. The clinker fired in the rotary kiln enters the particle classification air duct through the kiln door cover. The hot air blown out of the classification air duct will generate a horizontal speed, sweeping most of the selected small particles to the fine particle settling chamber behind the kiln door cover. After settling, the fine particles enter the fine material cooling zone below, and most of the large-size particles fall into the coarse material cooling zone below the air duct through the classification air duct for cooling; S2. Nearly 80% or more of the clinker is accumulated in the coarse material cooling zone and performs countercurrent heat exchange with the incoming cold air; the coarse particles after cooling are crushed into smaller particles by the roller crusher and enter the secondary cooling zone; at the same time, the powder entering the fine material cooling zone is cooled by the air blown in from the fine material side air inlet, and the cooled fine particles fall into the secondary cooling zone; S3, the coarse and fine clinkers after primary cooling are cooled again in the secondary cooling zone, and the final clinker temperature is controlled within 100°C and discharged to the external zipper machine through the unloading ash hopper; S4. The high-temperature hot air that has completed heat exchange in the cooler rises and passes through the kiln door cover and is divided into two parts. One part enters the rotary kiln as secondary air as combustion-supporting air for fuel combustion in the kiln, and the other part enters the tertiary air duct as tertiary air and is sent to the decomposition furnace as combustion-supporting air for fuel combustion in the decomposition furnace.

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