A control system and control method for optimizing grate clinker cooling

Abstract

The application discloses a control system and a control method for optimizing clinker cooling of a grate cooler, and aims to provide a control system and a control method for optimizing clinker cooling of a grate cooler, wherein the inside of a box body of the grate cooler is sequentially divided into multiple cooling sections according to the material flow direction, cement clinker formed after raw materials are calcined flows into the cooling sections of the grate cooler, air doors of each air cooling chamber of the cooling sections are sequentially opened to blow and cool the cement clinker, according to the air pressure and the temperature of the current cooling section, the high-pressure cooling air flow above the grate bed is opened or closed, the air pressure on both sides of the grate bed is adjusted, the cement clinker is conveyed through the grate bed in the box body from the feeding end of the grate bed to the discharging end to realize step-by-step blowing and cooling. The application automatically adjusts the air pressure on both sides in the cooling area, solves the problem that the air in the air-filled beam cannot blow through the cement clinker to form a “red river” phenomenon due to air leakage at a position with a thin material layer, and improves the clinker cooling efficiency.

Description

[0001] TECHNICAL FIELD 法

[0002] The present application relates to the technical field of grate cooler, in particular to a control system and control method for optimizing the clinker cooling of a grate cooler. BACKGROUND

[0003] The grate cooler is an important main equipment in the clinker burning system of a cement plant, and its main function is to cool and transport the cement clinker, and to provide hot air for the rotary kiln and the decomposing furnace, and it is the main equipment for heat recovery in the burning system. More than 80% of the existing cement production lines mostly use the second or third generation of cement clinker grate coolers. The traditional second and third generation of grate coolers have large grate resistance. The cold air is blown to cool the clinker on both sides of the fixed slope at the front end of the grate cooler, the air-filled grate beam is in series communication, the clinker is stacked to form a pile at the slope position, the pile is in the shape of a slope, the material layer is higher near the kiln opening, and the cooling air is difficult to blow through, the material layer is large in size at the position far from the kiln opening, and the cooling air is easy to blow through the clinker, forming a wind running that affects the overall air pressure in the air-filled beam, causing the fine powder material layer near the kiln opening at the material dropping end to be unable to be blown through, and the effect of rapid cooling is not good, and the "snowman" phenomenon of the slope pile may occur. Under the condition of counterclockwise rotation of the rotary kiln, the fine powder clinker is more and the density is large at the material dropping end (right side) on the grate bed, the resistance of the cooling air blowing through the material layer is large, and the fine powder is less and the particle shape is good at the non-material dropping end (left side), the gap between the particles is large, and the resistance of the cooling air blowing through the material layer is small. Therefore, the side with less fine powder is over-cooled, and even the wind running affects the overall air pressure in the air-filled beam, the air pressure on the fine powder side cannot be improved to blow through the clinker layer for cooling, and finally the poor clinker cooling effect leads to the formation of high-temperature red material, and this problem is also the main source of the formation of "red river"; the air-filled beam on the side with more fine powder clinker is configured with a cooling fan, the ventilation resistance is large, the air volume passing through is small, the pressure is small, the blowing through rate is not good, and the poor rapid cooling effect of the clinker leads to the formation of "red river". Because the fan has small air pressure, the "red river" high-temperature heat exchange zone cannot be taken out, leading to increased heat consumption and large waste heat loss, and after the waste heat loss, the boiler temperature cannot be improved, the heat exchange efficiency is low, and the power generation of the waste heat boiler is affected, and the cement clinker cooling has certain limitations, and it is necessary to improve. SUMMARY

[0004] The present application relates to the technical field of grate cooler, in particular to a control system and control method for optimizing the clinker cooling of a grate cooler.

[0005] According to one aspect of the present invention, a control method for optimizing clinker cooling in a grate cooler is provided. The control method includes: dividing the interior of the grate cooler into multiple mutually separated cooling sections according to the material flow direction; cement clinker formed after calcining raw materials flows into the cooling sections of the grate cooler; sequentially opening the dampers of each air-cooling chamber in the cooling section to blow air and cool the cement clinker; opening or closing the high-pressure cooling airflow below the grate bed according to the current air pressure and temperature of the cooling section; adjusting the air pressure entering both sides of the grate bed; and ensuring that the clinker passes through the grate bed interconnected within the housing and is cooled by the grate bed. of The material is conveyed from the inlet to the outlet to achieve staged air cooling.

[0006] The cooling sections within the chamber consist of a high-temperature section A, a medium-temperature section B, and a low-temperature section C. High-temperature section A comprises a first, second, and third cooling zone; the medium-temperature section comprises a fourth cooling zone; and the low-temperature section is divided into a fifth and sixth cooling zone. Each cooling zone is respectively equipped with a first, second, third, fourth, fifth, and sixth cold air chamber. Clinker moves through the grate from the first cooling zone via the second, third, fourth, fifth, and sixth cooling zones. Based on the current material layer parameters in each cooling zone, cooling fans in each cold air chamber blow air into the corresponding cooling zone for cooling, achieving air pressure boosting and balancing of the air pressure value within each cooling zone. The main process is as follows:

[0007] The grate bed is cooled by independent airflow to the front, middle and rear sections of the first cooling zone;

[0008] Single-zone air supply cooling is applied to the grate on both sides and the middle section of the second cooling zone, and the air supply pressure is adjusted for the grate in the middle section of the second cooling zone.

[0009] The third cooling zone's grate bed is cooled by single-zone pressurized air supply, and the grate bed in the third cooling zone is also adjusted by intermittent air supply pressurization.

[0010] The grate bed in the fourth cooling zone is cooled by single-zone pressurized air supply, and the air supply pressurization of the grate bed in the fourth cooling zone is adjusted at intervals.

[0011] The area of ​​the cooling grate bed in the first, second, third, fourth, fifth, and sixth cooling zones increases progressively.

[0012] In a further preferred embodiment of the above scheme, the first five rows of grates in the first cooling zone and at the front end of the first cold air chamber are cooled by independent air supply, and the first to third rows of grates are interconnected and compensated for air pressure with the fourth and fifth rows of grates. The sixth row of grates and the grates thereafter in the first cooling zone are cooled by independent air supply through a staggered inclined air-filled beam.

[0013] In a further preferred embodiment of the above scheme, the front end of the first cold air chamber is independently supplied with air to the first to third rows of grates in the first cooling zone via the front part of the first chamber ventilation duct by the first booster fan, and the two ends of the first chamber ventilation duct on both sides of the third row of grates in the first cooling zone are respectively provided with first balancing air valves. The rear end of the first cold air chamber is independently supplied with air to the fourth and fifth rows of grates in the first cooling zone via the rear part of the first chamber ventilation duct by the second booster fan. When the first to third rows of grates in the first cooling zone are independently supplied with increased air pressure, the air pressure between the fourth and fifth rows of grates in the first cooling zone remains unchanged.

[0014] In a further preferred embodiment of the above scheme, a second balancing air valve is installed in the middle of the inclined air-filled beam in the first cooling zone, thereby forming a single-zone air supply area on both sides. The air pressure and air volume of the first cold air chamber are increased by the third and fourth booster fans respectively through the two ends of the inclined air-filled beam in the first cooling zone to the sixth row and the grate beds that are spaced evenly after the sixth row for cooling air supply.

[0015] In a further preferred embodiment of the above scheme, three rows of two-chamber inclined air-filled beams extending into the second cooling zone are provided at the front end of the second cold air chamber. A first partition is installed in the middle of each of the two-chamber inclined air-filled beams to disconnect them, so that the two sides of the first partition in each row of air-filled beams form a single-zone air supply area on both sides. Each row of two-chamber inclined air-filled beams is connected to the first high-pressure air-filled grate bed provided on the corresponding grate bed below. Both ends of the two-chamber inclined air-filled beams are connected to the fifth booster fan.

[0016] In a further preferred embodiment of the above scheme, three rows of three-chamber inclined air-filled beams extending into the third cooling zone are arranged in the third cold air chamber. A second partition is arranged in the middle of each row of three-chamber inclined air-filled beams in the third cooling zone. A sixth booster fan is connected to one end of the three rows of inclined air-filled beams, and a seventh booster fan is connected to the other end of the three rows of air-filled beams.

[0017] Five rows of four-chamber inclined air-filled beams extending into the fourth cooling zone are installed in the fourth cold air chamber. One end of the four-chamber inclined air-filled beams is connected to the eighth booster fan, and the other end of the four-chamber inclined air-filled beams is connected to the ninth booster fan. A third partition is installed in the middle of each row of four-chamber inclined air-filled beams.

[0018] In a further preferred embodiment of the above scheme, at least two rows of third high-pressure air-filled grates are provided on the grates between the two rows of three-chamber inclined air-filled beams in the third cooling zone, and a fourth high-pressure air-filled grates are provided on the grates between every two rows of air-filled beams in the fourth cooling zone.

[0019] In a further preferred embodiment of the above scheme, the control system includes a grate cooler housing, inside which multiple mutually separated cooling sections are arranged sequentially according to the material flow direction. Each cooling section consists of a high-temperature section A, a medium-temperature section B, and a low-temperature section C. The high-temperature section A comprises a first cooling zone, a second cooling zone, and a third cooling zone. The medium-temperature section comprises a fourth cooling zone. Windbreaks are arranged between adjacent cooling zones. The low-temperature section is divided into a fifth cooling zone and a sixth cooling zone. Each cooling zone is respectively provided with a first, second, third, fourth, fifth, and sixth cold air chamber. Cooling fans in each cold air chamber blow air into the corresponding cooling zone through ventilation openings for cooling. The area of ​​the grate bed being cooled in the first, second, third, fourth, fifth, and sixth cooling zones increases progressively.

[0020] Five rows of grates are installed on the grate bed at the front end of the first cooling zone and the first cold air chamber. The first to third rows of grates are interconnected with the fourth and fifth rows to compensate for air pressure. An inclined air-filled beam is interspersed above the sixth row of grates and the grates thereafter at the rear end of the first cooling zone. At the front end of the first cold air chamber, a first booster fan directs air through the front part of a ventilation duct to the first to third rows of grates in the first cooling zone. The plates are independently ventilated, and first balancing air valves are respectively installed at both ends of the ventilation pipes of the chamber on both sides of the third row of grates in the first cooling zone. The rear part of the first cold air chamber is independently ventilated to the fourth and fifth rows of grates in the first cooling zone through the rear part of the ventilation pipes of the chamber via the second booster cold air fan. When the first to third rows of grates in the first cooling zone are independently ventilated with increased air pressure, a second balancing air valve is installed in the middle of the inclined air-filled beam in the first cooling zone.

[0021] Three rows of inclined air-filled beams extending into the second cooling zone are set at the front end of the second cold air chamber. A first partition is installed in the middle of each inclined air-filled beam. Each row of inclined air-filled beams and the corresponding grate below are provided with a first high-pressure air-filled grate that communicates with the inclined air-filled beams. Both ends of the inclined air-filled beams are connected to the fifth booster fan.

[0022] Located in the third cold air chamber, there are three rows of three-chamber inclined air-filled beams extending into the third cooling zone. A second partition is installed in the middle of each row of three-chamber inclined air-filled beams in the third cooling zone. The sixth booster fan is connected to one end of the three rows of three-chamber inclined air-filled beams, and the seventh booster fan is connected to the other end of the three rows of three-chamber inclined air-filled beams.

[0023] Located in the fourth cold air chamber, there are five rows of four-chamber inclined air-filled beams extending into the fourth cooling zone. One end of the four-chamber inclined air-filled beams is connected to the eighth booster fan, and the other end of the four-chamber inclined air-filled beams is connected to the ninth booster fan. A third partition is set in the middle of each row of four-chamber inclined air-filled beams.

[0024] In a further preferred embodiment of the above scheme, at least two rows of third high-pressure air-filled grates are provided on the grates between the two rows of three-chamber inclined air-filled beams in the third cooling zone, and a fourth high-pressure air-filled grates are provided on the grates between every two rows of air-filled beams in the fourth cooling zone.

[0025] In summary, due to the adoption of the above-mentioned technical solutions, the present invention has the following technical effects: The present invention adjusts the air pressure on both sides in the cooling zone, solving the problem of air leakage in thin material layers causing the air pressure in the air-filled beam to be unable to penetrate the clinker and form a "red river" phenomenon; at the same time, it improves the clinker cooling efficiency, avoids high-temperature clinker burning the grate and guard plate, utilizes the waste heat of the "red river", increases the temperature of the waste heat boiler to increase power generation, reduces resource waste, and lowers production costs. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the control system for optimizing clinker cooling in a grate cooler according to the present invention.

[0027] Figure 2 This is a schematic diagram of the cooling structure of the first cooling zone of the present invention;

[0028] Figure 3 This is a schematic diagram of the cooling structure of the second cooling zone of the present invention;

[0029] Figure 4 This is a schematic diagram of the cooling structure of the third cooling zone of the present invention;

[0030] Figure 5 This is a schematic diagram of the cooling structure of the fourth cooling zone of the present invention;

[0031] In the attached diagram, there is a box body 1, a grate bed 2, a first cooling zone 10, a cold air chamber 11, a first booster air cooler 12, a chamber ventilation pipe 13, a first balancing air valve 14, a second booster air cooler 15, a third booster fan 16, a chamber inclined air-filling beam 17, a second balancing air valve 18, and a third booster fan 19.

[0032] Second cooling zone 20, second air chamber 21, second chamber inclined air-filled beam 22, first partition 22a, first high-pressure air-filled grate 23, fifth booster fan 24;

[0033] The third cooling zone 30, the three cooling air chambers 31, the three chamber inclined air-filling beams 32, the sixth booster fan 33, the seventh booster fan 34, and the third high-pressure air-filling grate 35;

[0034] Fourth cooling zone 40, four air chambers 41, four chamber inclined air-filled beams 42, third partition 42a, eighth booster fan 43, ninth booster fan 44, fourth high-pressure air-filled grate 45.

[0035] Fifth cooling zone 50, fifth air chamber 51, sixth cooling zone 60, and sixth air chamber 61; Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, it should be noted that many details listed in the specification are merely to provide the reader with a thorough understanding of one or more aspects of the present invention, and these aspects of the invention can be implemented even without these specific details.

[0037] Combination Figure 1 and Figure 2As shown, this invention provides a control system for optimizing clinker cooling in a grate cooler. The control system includes a grate cooler housing 1. The housing 1 is divided into multiple mutually separated cooling sections according to the material flow direction. Each cooling section consists of a high-temperature section A, a medium-temperature section B, and a low-temperature section C. The high-temperature section A consists of a first cooling zone 10, a second cooling zone 20, and a third cooling zone 30. The medium-temperature section consists of a fourth cooling zone 40. Wind-blocking baffles 5 are respectively provided between adjacent cooling zones. The low-temperature section is divided into a fifth cooling zone 50 and a sixth cooling zone 60. Each cooling zone is respectively provided with a first cold air chamber 11, a second cold air chamber 21, a third cold air chamber 31, and a fourth cold air chamber 4. 1. Five-cooled air chamber 51 and six-cooled air chamber 61; in each cooling air chamber, the cooling fan 4 blows the original airflow into the corresponding cooling zone through the ventilation port for air cooling; wherein, the area of ​​the grate bed being cooled in the first cooling zone 10, second cooling zone 20, third cooling zone 30, fourth cooling zone 40, fifth cooling zone 50, and sixth cooling zone 60 increases progressively; in this invention, five rows of grate plates are provided on the grate bed 2 located at the front end of the first cooling air chamber 11 in the first cooling zone 10, and the first to third rows of grate plates are interconnected with the fourth and fifth rows of grate plates to compensate for the air pressure, and the sixth row of grate plates and the subsequent part of the grate bed 2 located at the rear end of the first cooling zone 10 are also provided for air cooling. An inclined air-filled beam 17 is staggered above the grate. The front portion of the first cold air chamber 11 is independently ventilated to the first row of grates to the third row of grates in the first cooling zone 10 via a first booster fan 12 along the front portion of a chamber ventilation duct 13. First balancing air valves 14 are respectively installed at both ends of the chamber ventilation duct 13 on both sides of the third row of grates in the first cooling zone 10. The rear portion of the first cold air chamber 11 is independently ventilated to the fourth and fifth rows of grates in the first cooling zone 10 via a second booster fan 15 along the rear portion of a chamber ventilation duct 13. When the first row of grates to the third row of grates in the first cooling zone 10 are independently ventilated with increased air pressure... At the same time; a second balancing air valve 18 is installed in the middle of the inclined air-filled beam 17 in the first cooling zone 10; the first three rows are ventilated by increasing the air pressure through the first booster air cooler 12, and the last two rows are ventilated by the original cooling fan 4 and the second booster air cooler 15. The first balancing air valve 14 is installed in the air ducts connected in series on both sides to connect and adjust the air pressure balance between the front and rear zones, so as to avoid the material layer on the slope from affecting the air pressure of the entire slope due to the low blowing penetration rate and air leakage. The two rows of inclined air-filled beams 17 in the high-temperature section of the first cooling zone 10 are disconnected in the middle and the second balancing air valve 18 is installed to connect them. The air pressure on both sides is automatically adjusted to solve the problem of air leakage in the thin material layer causing the air pressure in the air-filled beam to be unable to blow through the clinker and form the "red river" phenomenon.

[0038] Three rows of inclined air-filled beams 22 extending into the second cooling zone 20 are arranged at the front end of the second cold air chamber 21. First partitions 22a are installed in the middle of each inclined air-filled beam 22. Each row of inclined air-filled beams 22 is connected to a first high-pressure air-filled grate 23 on the corresponding grate 2 below it. Both ends of the inclined air-filled beams 22 are connected to the fifth booster fan 24. The high-temperature section of the second cooling zone 20 contains a large amount of fine clinker, resulting in low clinker penetration and poor heat exchange. Therefore, the two fifth booster fans 24 increase the air pressure through the inclined air-filled beams 22 in the second cooling zone 20, ensuring thorough clinker cooling and eliminating the "red river" effect. This also improves clinker cooling efficiency, prevents high-temperature clinker from burning the grate and guard plates, utilizes the residual heat from the "red river," and increases the temperature of the waste heat boiler to increase power generation.

[0039] Located in the third cold air chamber 31, there are three rows of three-chamber inclined air-filled beams 32 extending into the third cooling zone 30. A second partition 32a is provided in the middle of each row of three-chamber inclined air-filled beams 32 in the third cooling zone 30. A sixth booster fan 33 is connected to one end of the three rows of three-chamber inclined air-filled beams 32, and a seventh booster fan 34 is connected to the other end of the three rows of three-chamber inclined air-filled beams 32. At least two rows of third high-pressure air-filled grate plates 35 are provided on the grate bed 2 between the two rows of three-chamber inclined air-filled beams 32 in the third cooling zone 30.

[0040] Five rows of four-chamber inclined air-filled beams 42 extending into the fourth cooling zone 40 are installed in the fourth cold air chamber 41. One end of the four-chamber inclined air-filled beams 42 is connected to the eighth booster fan 43, and the other end is connected to the ninth booster fan 44. A third partition 42a is installed in the middle of each row of four-chamber inclined air-filled beams 42. A fourth high-pressure air-filled grate 45 is installed on the grate bed 2 between every two rows of air-filled beams in the fourth cooling zone 40. As the fine clinker gradually cools down, the air pressure is insufficient when it reaches the third cooling zone 30 and the fourth cooling zone 40, which often causes the clinker temperature to be high. To this end, the air volume and air pressure on the right side of the three cold air chambers 31 are increased to allow the fine powder clinker on the right side to be thoroughly blown through, thereby improving the heat exchange efficiency of the clinker and taking the waste heat out of the clinker for power generation. After the four inclined air-filled beams 42 extending into the fourth cooling zone 40 in the fourth cold air chamber 41 are independently supplied with air, the air pressure of the grate bed and the cooling of the clinker are increased, thereby accelerating the temperature reduction of the delivered clinker.

[0041] According to another aspect of the present invention, the present invention provides a control method for optimizing clinker cooling in a grate cooler. The control method includes: dividing the interior of the grate cooler housing 1 into multiple mutually separated cooling sections according to the material flow direction; cement clinker formed after calcining raw materials flows into the cooling sections of the grate cooler; sequentially opening the dampers of each air-cooling chamber in the cooling section to blow air and cool the cement clinker; opening or closing the high-pressure cooling airflow below the grate bed 2 according to the current air pressure and temperature of the cooling section; adjusting the air pressure entering both sides of the grate bed 2; and ensuring that the clinker passes through the grate bed 2 interconnected within the housing 1 and is cooled by the airflow from the grate bed 2. of The material is conveyed from the inlet to the outlet to achieve step-by-step air cooling. In this invention, the cooling sections within the housing 1 consist of a high-temperature section A, a medium-temperature section B, and a low-temperature section C. The high-temperature section A comprises a first cooling zone 10, a second cooling zone 20, and a third cooling zone 30. The medium-temperature section comprises a fourth cooling zone 40. The low-temperature section is divided into a fifth cooling zone 50 and a sixth cooling zone 60. Each cooling zone is respectively equipped with a cold air chamber 11, a second cold air chamber 21, a third cold air chamber 31, a fourth cold air chamber 41, a fifth cold air chamber 51, and a sixth cold air chamber 61. The material moves through the grate 2 from the first cooling zone 10 through the second cooling zone 20, the third cooling zone 30, the fourth cooling zone 40, the fifth cooling zone 50, and the sixth cooling zone 60. The area of ​​the grate cooled in the first cooling zone 10, the second cooling zone 20, the third cooling zone 30, the fourth cooling zone 40, the fifth cooling zone 50, and the sixth cooling zone 60 is... The cooling process is gradually accelerated. Based on the current material layer parameters of each cooling zone, including material layer thickness, cooling zone pressure, temperature, air pressure, and air velocity, when the material layer is thin, the cooling air can easily penetrate the material layer, resulting in lower pressure within the cooling zone. Conversely, when the material layer is thick, the cooling air cannot easily penetrate the material layer, resulting in higher pressure within the cooling zone. While maintaining the material layer thickness, the cement clinker is cooled by adjusting the air velocity and air pressure to ensure clinker quality. Insufficient airflow can easily lead to uneven clinker temperature distribution and cooling deformation. Insufficient airflow can easily lead to poor clinker cooling, quality degradation, heat waste, and damage to the grate. The cooling fans 4 in each cold air chamber supply the original airflow to the corresponding cooling zone for blowing cooling, achieving air pressure boosting and balancing of the air pressure value within each cooling zone. The pressure boosting process mainly proceeds according to the following steps:

[0042] The grate bed 2 is cooled by independent airflow to the front, middle, and rear sections of the first cooling zone 10. Within the first cooling zone 10 and at the front of the first cold air chamber 11, the first five rows of grates of the grate bed 2 are cooled by independent airflow, with air pressure compensation between the first to third rows of grates and the fourth and fifth rows. Independent airflow is supplied above the sixth row of grates and the grates thereafter via intermittently arranged inclined air-filled beams 17. Cooling; the front part of the first cold air chamber 11 is independently supplied with air to the first row of grates to the third row of grates in the first cooling zone 10 through the front part of the first chamber ventilation duct 13 via the first booster air cooler 12, and the first balancing air valves 14 are respectively installed at both ends of the first chamber ventilation duct 13 on both sides of the third row of grates in the first cooling zone 10, and the first balancing air valves 14 are used to compensate for the air pressure; the rear part of the first cold air chamber 11 is supplied with air to the first cooling zone 10 through the rear part of the first chamber ventilation duct 13 via the second booster air cooler 15. The fourth and fifth rows of grates in the first cooling zone 10 are independently supplied with air. When the first to third rows of grates in the first cooling zone 10 are independently supplied with increased air pressure, the air pressure between the fourth and fifth rows of grates in the first cooling zone 10 remains unchanged. A second balancing air valve 18 is installed in the middle of the inclined air-filling beam 17 in the first cooling zone 10, thereby forming a single-zone air supply area on both sides. The third booster fans 19 on both sides of the first cold air chamber 11 are connected by the inclined air-filling beam 17 in the first cooling zone 10 through the spaced and staggered arrangement of the inclined air-filling beam 17. The air pressure and volume are increased at both ends of column 7 to the sixth row and the grate bed at even intervals after the sixth row for cooling air supply. This increases the air pressure and volume at the "red river" location where fine powder occurs at the drop end of the sixth and eighth rows for cooling air supply. Air is blown in two zones before and after the inclined air-filled beam 17 in one chamber, effectively preventing air leakage at the lower part of the material layer from affecting the air pressure of the entire fixed inclined section. A balancing air valve installed in the series-connected ventilation pipe 13 can adjust the air pressure in the two zones before and after, increasing the temperature of secondary and tertiary air, and playing a certain role in reducing energy consumption during calcination in the kiln. The "red river" phenomenon is solved by increasing the single-zone air supply technology on the right side (drop end). Fine powder at the drop end drifts towards the middle of the grate bed, improving the permeability of the right side, increasing heat exchange efficiency, effectively recovering the high temperature of the "red river," and increasing the inlet temperature of the waste heat boiler, which can effectively increase waste heat power generation. The "red river" phenomenon in the grate cooler is significantly resolved; the heat blown out significantly increases the temperature of the waste heat boiler by 52°C, and power generation increases by 2.3 degrees.

[0043] A first balancing damper 14 is installed inside the series air duct. The first balancing damper 14 is used to disconnect the inclined air-filled beam, creating independent airflow in the first three rows and the last two rows. Figure 2In areas A and B, the first balancing air valve 14 allows for the interconnection of the front and rear areas to compensate for air pressure. When pressurized air is supplied to the front three rows of grates (area A) (through the first pressurized air cooler 12 and the cooling fan 4 on the first cooling zone 10), the thick material layer on the slope is blown through. Due to the isolation provided by the first balancing air valve 14, the fan pressure of the rear two rows of grates (area B) remains unchanged. Two rows of one-chamber inclined air-filled beams 17 are spaced apart above the rear end of the first cooling zone 10, such as... Figure 2 In area C, a second balancing air valve 18 is installed in the middle of the inclined air-filled beam 17, thereby forming a single-zone air supply on both sides. The function of the second balancing air valve 18 is to connect the grate beds on both sides and regulate the air pressure to prevent air leakage; the third booster fan 19 increases the pressure at the rear fine powder "red river" position (e.g., Figure 2 The air pressure and air volume in area D are adjusted to achieve the purpose of cooling the "Red River".

[0044] Single-zone airflow cooling is applied to the sides and middle section of the grate 2 within the second cooling zone 20, and the airflow pressure is increased and adjusted in the middle section of the grate 2 within the second cooling zone 20. Figure 1 and Figure 3 As shown; three rows of two-chamber inclined air-filled beams 22 extending into the second cooling zone 20 are arranged at the front end of the second cold air chamber 21. First partitions 22a are installed in the middle of each of the two-chamber inclined air-filled beams 22 to separate them, so that single-zone air supply areas are formed on both sides of the first partitions 22a in each row of air-filled beams. Each row of two-chamber inclined air-filled beams 22 is connected to the first high-pressure air-filled grate 23 installed on the corresponding grate 2 below. Both ends of the two-chamber inclined air-filled beams 22 are connected to the fifth booster fan 24. The grate 23s after the middle of the second cooling zone 20 (the tenth, twelfth, and thirteenth rows increase air pressure and air volume for cooling air supply at the fine powder "Red River" generation side of the material drop end). Each row of two-chamber inclined air-filled beams 22 in the second cooling zone 20 is equipped with a first high-pressure air-filled grate 23 on the corresponding grate 2 below, as shown... Figure 3 As shown in area b, this increases the high-pressure cooling area of ​​the grate bed; area c in the second cooling zone 20 is pressurized and ventilated by the cooling fan 4 of this cooling zone, and the air pressure and air volume on the side of the fine powder "Honghe" in area b are increased by the fifth pressurizing fan 24. The first partition 22a is installed in the middle of the inclined air-filled beam 22 of the two chambers to disconnect and form single-zone air supply on both sides to prevent air leakage; the first high-pressure air-filled grate bed 23 in the second cooling zone 20 can effectively increase the high-pressure cooling area, and the disconnection in the middle of the inclined air-filled beam 22 of the two chambers forms independent air blowing on both sides to solve the problem of air leakage between the two materials.

[0045] The third cooling zone 30 is cooled by single-zone pressurized air supply to the grate bed 2, and the air supply pressurization of the grate bed 2 in the third cooling zone 30 is adjusted intermittently. Figure 1 and Figure 4As shown; three rows of three-chamber inclined air-filled beams 32 extending into the third cooling zone 30 are arranged in the third cold air chamber 31. A second partition 32a is arranged in the middle of each row of three-chamber inclined air-filled beams 32 in the third cooling zone 30. A sixth booster fan 33 is connected to one end of the three rows of inclined air-filled beams, and a seventh booster fan 34 is connected to the other end of the three rows of air-filled beams. The sixteenth, eighteenth, and twentieth rows in the rear half of the third cooling zone 30 increase the air pressure and air volume at the side where the fine powder "Red River" is generated at the material drop end for cooling and air supply. At least two rows of third high-pressure air-filled grate plates 35 are arranged on the grate bed 2 between the two rows of three-chamber inclined air-filled beams 32 in the third cooling zone 30. Figure 4 In the middle, when area c in the third cooling zone 30 is pressurized and ventilated by the cooling fan 4 of the cooling zone, areas d on both sides of the three rows of three chambers of inclined air-filled beams 32 are cooled by the sixth pressurized fan 33 and the seventh pressurized fan 34 respectively, while increasing the air pressure and air volume on the "Red River" side; the two rows of third high-pressure air-filled grates 35 increase the high-pressure cooling area of ​​the grate bed; a second partition 32a is installed in the middle of the three rows of three chambers of inclined air-filled beams 32 to disconnect and form single-zone air supply on both sides;

[0046] Single-zone pressurized air supply cooling is applied to the grate bed 2 in the fourth cooling zone 40, and intermittent air supply pressurization is regulated for the grate bed 2 in the fourth cooling zone 40; such as Figure 1 and Figure 5 As shown, five rows of four-chamber inclined air-filled beams 42 extending into the fourth cooling zone 40 are arranged in the fourth cold air chamber 41. One end of the four-chamber inclined air-filled beams 42 is connected to the eighth booster fan 43, and the other end is connected to the ninth booster fan 44. A third partition 42a is arranged in the middle of each row of four-chamber inclined air-filled beams 42. A fourth high-pressure air-filled grate 45 is arranged on the grate bed 2 between every two rows of air-filled beams in the fourth cooling zone 40. The five rows of four-chamber inclined air-filled beams 42 extending into the fourth cooling zone 40 ( Figure 5The two ends of the middle d area are cooled by air blowing from the eighth booster fan 43 and the ninth booster fan 44, increasing the cooling air volume of the air-filled beams and improving cooling efficiency. The grate bed 2 (e area) in the fourth cooling zone 40 is pressurized and ventilated by the cooling fan 4 of this cooling zone. Moreover, a fourth high-pressure air-filled grate plate 45 is installed on the grate bed 2 between every two rows of air-filled beams in the fourth cooling zone 40 to increase the cooling area of ​​the grate bed. A third partition plate 42a is installed in the middle of each row of four-chamber inclined air-filled beams 42 to separate them and form single-zone air supply on both sides. Improve clinker cooling efficiency; the third cooling zone 30 and the fourth cooling zone 40 are independently supplied with air by two fans. When the air pressure on the right side of the third cooling zone 30 is increased to solve the "red river" problem on the right side, the clinker temperature is reduced from the original 190℃ to between 73-108℃ (the clinker temperature can be maintained at 90-100℃), which effectively improves the service life of the grate plate and guard plate of the grate cooler. The waste heat on the right side of the third cooling zone 30 can increase the waste heat power generation, so that the fine powder at the grate bed drop end can drift to the middle as expected, the temperature on the right side drops significantly, and the wear of the grate plate is small.

[0047] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A control system for optimizing clinker cooling in a grate cooler, characterized in that: The control system includes a grate cooler housing (1), inside which are arranged multiple mutually separated cooling sections according to the material flow direction. The cooling sections consist of a high-temperature section A, a medium-temperature section B, and a low-temperature section C. The high-temperature section A consists of a first cooling zone (10), a second cooling zone (20), and a third cooling zone (30). The medium-temperature section consists of a fourth cooling zone (40). Windbreaks (5) are arranged between adjacent cooling zones. The low-temperature section is divided into a fifth cooling zone (50) and a sixth cooling zone (60). A cooling zone is provided with a first cold air chamber (11), a second cold air chamber (21), a third cold air chamber (31), a fourth cold air chamber (41), a fifth cold air chamber (51), and a sixth cold air chamber (61). The cooling fan (4) in each cold air chamber blows the original air flow into the corresponding cooling zone through the ventilation port for cooling. The area of ​​the grate bed being cooled in the first cooling zone (10), the second cooling zone (20), the third cooling zone (30), the fourth cooling zone (40), the fifth cooling zone (50), and the sixth cooling zone (60) increases progressively. Five rows of grates are provided on the grate bed (2) located at the front end of the first cold air chamber (11) in the first cooling zone (10), and the first to third grates are interconnected with the fourth and fifth grates to compensate for air pressure. An inclined air-filled beam is interspersed above the sixth grates and the grates after them in the grate bed (2) located at the rear end of the first cooling zone (10). The front end of the first cold air chamber (11) is independently supplied to the first to third grates in the first cooling zone (10) through the front part of the first booster air cooler (12) along the front part of the ventilation pipe (13). The air is supplied by a second booster fan (15) to the fourth and fifth grates in the first cooling zone (10) through the rear part of the first cooling zone (11) via the rear part of the first cooling zone (10) ventilation pipe (13) along the rear part of the first cooling zone (10); when the first to third grates of the grate bed (2) in the first cooling zone (10) are supplied with air by an independent increase in air pressure; a second balance valve (18) is installed in the middle of the inclined air-filled beam (17) in the first cooling zone (10). Three rows of two-chamber inclined air-filled beams (22) extending into the second cooling zone (20) are provided at the front end of the second cold air chamber (21). A first partition (22a) is installed in the middle of the two-chamber inclined air-filled beams (22). Each row of two-chamber inclined air-filled beams (22) and the corresponding grate bed (2) below are provided with a first high-pressure air-filled grate bed (23) that communicates with the two-chamber inclined air-filled beams (22). The two ends of the two-chamber inclined air-filled beams (22) are respectively connected to the fifth booster fan (24). Located in the third cold air chamber (31), there are three rows of three-chamber inclined air-filled beams (32) extending into the third cooling zone (30). A second partition (32a) is provided in the middle of each row of three-chamber inclined air-filled beams (32) in the third cooling zone (30). A sixth booster fan (33) is connected to one end of the three rows of three-chamber inclined air-filled beams (32), and a seventh booster fan (34) is connected to the other end of the three rows of three-chamber inclined air-filled beams (32). Five rows of four-chamber inclined air-filled beams (42) extending into the fourth cooling zone (40) are provided in the fourth cold air chamber (41). One end of the four-chamber inclined air-filled beams (42) is connected to the eighth booster fan (43), and the other end of the four-chamber inclined air-filled beams (42) is connected to the ninth booster fan (44). A third partition (42a) is provided in the middle of each row of four-chamber inclined air-filled beams (42).

2. The control system for optimizing clinker cooling in a grate cooler according to claim 1, characterized in that: At least two rows of third high-pressure air-filled grate plates (35) are provided on the grate bed (2) between two rows of three-chamber inclined air-filled beams (32) in the third cooling zone (30), and a fourth high-pressure air-filled grate plate (45) is provided on the grate bed (2) between every two rows of air-filled beams in the fourth cooling zone (40).

3. A control method for a control system for optimizing clinker cooling in a grate cooler as described in claim 1 or 2, characterized in that: The control method includes: dividing the inside of the grate cooler housing (1) into multiple mutually separated cooling sections according to the material flow direction; cement clinker formed after calcining raw materials flows into the cooling section of the grate cooler; the dampers of each air-cooled chamber in the cooling section are opened sequentially to blow air and cool the cement clinker; according to the current air pressure and temperature of the cooling section, the high-pressure cooling airflow below the grate (2) is opened or closed; the air pressure entering both sides of the grate (2) is adjusted so that the clinker passes through the grate (2) connected to each other in the housing (1) and is cooled by the grate (2). of The material is conveyed from the inlet to the outlet to achieve staged air cooling.

4. The control method for an optimized control system for clinker cooling in a grate cooler according to claim 3, characterized in that: The cooling sections within the housing (1) consist of a high-temperature section A, a medium-temperature section B, and a low-temperature section C. The high-temperature section A comprises a first cooling zone (10), a second cooling zone (20), and a third cooling zone (30). The medium-temperature section comprises a fourth cooling zone (40). The low-temperature section is divided into a fifth cooling zone (50) and a sixth cooling zone (60). Each cooling zone is respectively provided with a cold air chamber (11), a second cold air chamber (21), a third cold air chamber (31), a fourth cold air chamber (41), and a fifth cold air chamber (51). The clinker moves through the grate (2) from the first cooling zone (10) through the second cooling zone (20), the third cooling zone (30), the fourth cooling zone (40), the fifth cooling zone (50), and the sixth cooling zone (60). Based on the current material layer parameter value of each cooling zone, the original air flow is blown into the corresponding cooling zone by the cooling fan (4) in each cooling zone to achieve air supply pressurization and adjustment of the balance air pressure value in each cooling zone. The main process is as follows: The grate bed (2) is cooled by independent air blowing to the front, middle and rear parts of the first cooling zone (10); Single-zone air supply cooling is performed on both sides and the middle part of the grate bed (2) in the second cooling zone (20), and the air supply pressure is adjusted on the grate bed (2) in the middle part of the second cooling zone (20); The grate bed (2) of the third cooling zone (30) is subjected to single-zone pressurized air supply cooling, and the grate bed (2) of the third cooling zone (30) is subjected to intermittent air supply pressurization adjustment; The grate bed (2) of the fourth cooling zone (40) is subjected to single-zone pressurized air supply cooling, and the grate bed (2) of the fourth cooling zone (40) is subjected to intermittent air supply pressurization adjustment; Among them, the area of ​​the cooling grate bed in the first cooling zone (10), the second cooling zone (20), the third cooling zone (30), the fourth cooling zone (40), the fifth cooling zone (50), and the sixth cooling zone (60) increases progressively.

5. The control method for an optimized control system for clinker cooling in a grate cooler according to claim 4, characterized in that: In the first cooling zone (10) and at the front end of the first cold air chamber (11), the first five rows of grate plates of the grate bed (2) are cooled by independent air supply. The first row of grate plates to the third row of grate plates are interconnected with the fourth and fifth rows of grate plates to compensate for the air pressure. The sixth row of grate plates and the grate plates in the grate bed (2) located in the first cooling zone (10) are cooled by independent air supply through a staggered inclined air-filled beam.

6. The control method for an optimized control system for clinker cooling in a grate cooler according to claim 5, characterized in that: The front end of the first cold air chamber (11) is independently supplied with air by the first booster fan (12) along the front part of the chamber ventilation pipe (13) to the first row of grates to the third grates in the first cooling zone (10). The first balancing air valves (14) are respectively installed at both ends of the chamber ventilation pipe (13) on both sides of the third row of grates in the first cooling zone (10). The rear end of the first cold air chamber (11) is independently supplied with air by the second booster fan (15) along the rear part of the chamber ventilation pipe (13) to the fourth row of grates and the fifth grates in the first cooling zone (10). When the first row of grates to the third row of grates in the first cooling zone (10) is independently supplied with increased air pressure, the air pressure between the fourth and fifth rows of grates in the first cooling zone (10) remains unchanged.

7. The control method for an optimized control system for clinker cooling in a grate cooler according to claim 6, characterized in that: A second balancing air valve (18) is installed in the middle of the inclined air-filled beam (17) in the first cooling zone (10), thereby forming a single-zone air supply area on both sides. The air pressure and air volume of the first cold air chamber (11) are increased by the third booster fan (16) and the fourth booster fan (19) respectively through the two ends of the inclined air-filled beam (17) arranged at intervals, and then cooled and supplied to the sixth row and the grate bed that is spaced evenly after the sixth row.

8. The control method for an optimized control system for clinker cooling in a grate cooler according to claim 4, characterized in that: Three rows of two-chamber inclined air-filled beams (22) extending into the second cooling zone (20) are set at the front end of the second cold air chamber (21). First partitions (22a) are installed in the middle of the two-chamber inclined air-filled beams (22) to disconnect them, so that the first partitions (22a) in each row of air-filled beams form single-zone air supply areas on both sides. Each row of two-chamber inclined air-filled beams (22) is connected to the first high-pressure air-filled grate (23) set on the grate (2) below. The two ends of the two-chamber inclined air-filled beams (22) are connected to the fifth booster fan (24).

9. The control method for an optimized control system for clinker cooling in a grate cooler according to claim 4, characterized in that: Three rows of three-chamber inclined air-filled beams (32) extending into the third cooling zone (30) are provided in the third cold air chamber (31). A second partition (32a) is provided in the middle of each row of three-chamber inclined air-filled beams (32) in the third cooling zone (30). A sixth booster fan (33) is connected to one end of the three rows of inclined air-filled beams, and a seventh booster fan (34) is connected to the other end of the three rows of air-filled beams. Five rows of four-chamber inclined air-filled beams (42) extending into the fourth cooling zone (40) are provided in the fourth cold air chamber (41). One end of the four-chamber inclined air-filled beams (42) is connected to the eighth booster fan (43), and the other end of the four-chamber inclined air-filled beams (42) is connected to the ninth booster fan (44). A third partition (42a) is provided in the middle of each row of four-chamber inclined air-filled beams (42).

10. The control method for an optimized control system for clinker cooling in a grate cooler according to claim 9, characterized in that: At least two rows of third high-pressure air-filled grate plates (35) are provided on the grate bed (2) between two rows of three-chamber inclined air-filled beams (32) in the third cooling zone (30), and a fourth high-pressure air-filled grate plate (45) is provided on the grate bed (2) between every two rows of air-filled beams in the fourth cooling zone (40).

Images