Ventilation quantity adjusting device and grate type cooling equipment

Abstract

The utility model relates to the field of equipment manufacturing, in particular to ventilation quantity adjusting equipment and grate type cooling equipment. The ventilation quantity adjusting device comprises a supporting plate, a rotating disc and a preset number of blades. Ventilation openings are formed in the corresponding positions of the supporting plate and the rotating disc. Each blade is provided with a first connecting part and a second connecting part; the first connecting part is connected with the rotating disc, and the second connecting part is connected with the supporting plate; the rotating disc is used for being driven to rotate and driving all the blades to rotate through the first connecting part, so that the opening degree of the ventilation opening is adjusted through rotation of all the blades, and the air volume of all areas of the grate type cooling equipment is accurately controlled. The heat exchange efficiency can be effectively improved, and air blowing power consumption and air consumption can be effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of manufacturing equipment for adjusting the ventilation volume of a grate cooler for cement clinker, and particularly to a ventilation volume adjustment device and a grate cooling device. Background Technology

[0002] Cement clinker cooling grate coolers (also known as grate-type coolers) play a crucial role in heat recovery and are core equipment in cement clinker production, significantly impacting coal and electricity consumption. When high-temperature clinker enters the grate cooler, uneven material distribution and significant differences in resistance across zones lead to uneven airflow distribution, low heat recovery efficiency, and substantial differences in blower power consumption, air consumption, and the temperatures of secondary and tertiary air and AQC (Air Quality Control) intake air across different production lines.

[0003] The air volume regulating valve used in the fourth-generation grate cooler can adjust the opening of the valve plate according to the resistance change, so that the sum of the clinker layer resistance and the grate plate resistance remains constant, and the air volume on the grate is evenly distributed.

[0004] Currently, there are various types of fourth-generation grate cooler airflow regulating valves on the market. Most mechanical airflow regulating valves automatically adjust the valve plate opening based on changes in resistance to achieve automatic airflow regulation. Their working principle is as follows: in areas with high resistance and low cooling airflow, the valve automatically widens, reducing resistance and increasing cooling airflow; in areas with low resistance and high cooling airflow, the valve automatically narrows, reducing airflow to achieve a constant airflow. However, many problems have arisen in actual factory applications. These include grate leakage causing valve malfunction or jamming; frequent valve plate oscillation leading to wear and breakage; large size and insufficient installation space; and flawed counterweight design resulting in poor airflow regulation. These issues lead to poor actual airflow regulation, cumbersome maintenance, and short service life, resulting in frequent replacement of the airflow regulating valves.

[0005] Therefore, designing a grate cooler airflow regulating valve that can accurately control airflow and has excellent working performance has become an urgent problem to be solved in cement production. Summary of the Invention

[0006] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, the present invention provides a ventilation volume regulating device and a cooling device.

[0007] This utility model provides a ventilation volume adjustment device, which includes a support plate, a rotating disk, and a preset number of blades; ventilation openings are provided at corresponding positions on the support plate and the rotating disk; each blade is provided with a first connecting part and a second connecting part; the first connecting part is connected to the rotating disk, and the second connecting part is connected to the support plate;

[0008] The rotating disk is driven to rotate and drives each blade to rotate through the first connecting part, so as to adjust the opening of the ventilation port by rotating each blade.

[0009] Optionally, the ventilation volume regulating device further includes a motor, a base plate, and a pressure transmitter; the motor is mounted on the base plate, and the motor and the outer edge of the rotating disk form a meshing transmission; the pressure transmitter is used to detect resistance data.

[0010] Optionally, the support plate forms a base plate; the rotating disk is disposed between each blade and the base plate; the first connecting part connects the rotating disk and the base plate respectively; the rotating disk is provided with multiple first tracks and multiple second tracks; each first connecting part is located in a first track, and each second connecting part is located in a second track.

[0011] Optionally, the first track is an arc track, and the second track is a straight track.

[0012] Optionally, the support plate forms a base plate; each blade is disposed between the rotating disk and the base plate; the rotating disk is provided with a plurality of third tracks, and the base plate is provided with a plurality of fourth tracks; each first connecting part is located in a third track, and each second connecting part is located in a fourth track.

[0013] Optionally, the third track is an arc-shaped track, and the fourth track is a straight track.

[0014] Optionally, each blade is disposed between the support plate and the rotating disk, and the support plate is connected to the base plate; the rotating disk is provided with a polygonal track, and the base plate is provided with a plurality of fifth tracks; each first connecting part is located in the polygonal track, and each second connecting part is located in a fifth track.

[0015] Optionally, the number of sides of the polygonal track is the same as the number of fifth tracks; each fifth track is a straight track and forms a preset angle with the side of the corresponding polygonal track.

[0016] Optionally, the ventilation volume regulating device further includes a fixed plate; the support plate forms a base plate; the fixed plate, the rotating plate, each blade and the base plate are arranged in sequence; the first connecting component is connected to the rotating plate through a rotating shaft, and the second connecting component is connected to the base plate.

[0017] This utility model also provides a grate cooling device, which includes the ventilation volume regulating device as described in any of the above.

[0018] The technical solution provided by this utility model embodiment has the following advantages compared with the prior art:

[0019] The ventilation volume regulating device and grate cooling equipment provided by this utility model can effectively improve heat exchange efficiency and effectively reduce the power consumption and air consumption of the blower. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the ventilation volume regulating device provided in Example 1;

[0023] Figure 2 for Figure 1 Sectional view along axis AA;

[0024] Figure 3 A schematic diagram of the rotating disk provided in Example 1;

[0025] Figure 4 Top and side views of the blade provided in Example 1;

[0026] Figure 5 A schematic diagram of the ventilation volume regulating device provided in Example 2;

[0027] Figure 6 for Figure 5 Sectional view along axis AA;

[0028] Figure 7 This is a schematic diagram of the structure of the grate provided in Example 2;

[0029] Figure 8 A schematic diagram of the flange provided in Example 2;

[0030] Figure 9 This is a schematic diagram of the rotating disk provided in Example 2;

[0031] Figure 10 This is a schematic diagram of the base plate provided in Example 2;

[0032] Figure 11 This is a schematic diagram of the blade structure provided in Example 2;

[0033] Figure 12 This is a schematic diagram of the ventilation volume regulating device provided in Example 3;

[0034] Figure 13 for Figure 12 Sectional view along axis AA;

[0035] Figure 14 This is a schematic diagram of the rotating disk provided in Example 3;

[0036] Figure 15 This is a schematic diagram of the structure of the base plate provided in Example 3;

[0037] Figure 16 This is a schematic diagram of the support plate provided in Example 3;

[0038] Figure 17 This is a schematic diagram of the blade structure provided in Example 3;

[0039] Figure 18 This is a schematic diagram of the ventilation volume regulating device provided in Example 4;

[0040] Figure 19 for Figure 18 Sectional view along axis AA;

[0041] Figure 20 This is a schematic diagram of the rotating disk provided in Example 4;

[0042] Figure 21 This is a schematic diagram of the structure of the base plate provided in Example 4;

[0043] Figure 22 This is a schematic diagram of the blade structure provided in Example 4;

[0044] Figure 23 This is a schematic diagram of the rotating shaft provided in Example 4. Detailed Implementation

[0045] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0046] In the following description, the use of suffixes such as "module," "part," or "unit" to denote elements is solely for the purpose of illustrative purposes and has no specific meaning in itself. Therefore, "module," "part," or "unit" may be used interchangeably.

[0047] This utility model provides a ventilation volume adjustment device including a support plate, a rotating disk, and a preset number of blades; ventilation openings are provided at corresponding positions on the support plate and the rotating disk; the two ventilation openings can be the same size or different; each blade is provided with a first connecting part and a second connecting part; the first connecting part is connected to the rotating disk, and the second connecting part is connected to the support plate;

[0048] The rotating disk is driven to rotate and drives each blade to rotate through the first connecting part, so as to adjust the opening of the ventilation port by rotating each blade.

[0049] The specific effects of this invention: In a cement clinker production line with an actual capacity of 6000T / D, the grate cooler had poor operating efficiency. By replacing the traditional air regulating valve with the ventilation volume regulating device provided by this invention, the production statistics before and after its implementation on each grate plate in the medium-high temperature section are shown below:

[0050] project Before use After use Secondary air temperature (°C) 1100 1200 Tertiary air temperature (°C) 970 1070 AQC air intake temperature (°C) 390 420 Standard coal consumption (g / kg·cl) 103.5 100.1 Cooling air consumption (Nm3 / kg.cl) 1.82 1.36 Blower power consumption (kWh / t.cl) 6.5 5.2 Waste heat power generation (kWh / t.cl) 27.2 28.3

[0051] As can be seen from the table above, compared to traditional air regulating valves, the improved ventilation volume regulating equipment uses data detected by a pressure transmitter to adjust the valve opening, resulting in more effective air volume regulation and more uniform air volume across different areas. After implementation, coal consumption, electricity consumption, and power generation have all been significantly improved.

[0052] Based on preliminary experiments, this invention achieves the following effects:

[0053] (1) The heat exchange efficiency of the grate cooler increases, the temperature of the secondary and tertiary air increases by 100℃ (stabilizing above 1200℃), the AQC intake air temperature increases by 30℃ (stabilizing above 420℃), and the clinker temperature exiting the grate cooler decreases by 50℃. The heat exchange efficiency of the grate cooler is improved by 10%.

[0054] (2) Standard coal consumption decreases, secondary and tertiary air temperatures increase, grate cooler recovers more heat into the kiln, and standard coal consumption decreases by 3-4 kgce / kg.cl.

[0055] (3) Increased waste heat power generation, with an increase of 30°C in AQC air intake temperature and increased air intake heat, leads to an increase of 2 kWh / t in waste heat power generation.

[0056] (4) Cooling air consumption is reduced, air is used more evenly in all areas of the grate cooler, and cooling air volume is reduced to below 1.4 Nm3 / kg.cl.

[0057] (5) Reduced power consumption of blower and cooling air, resulting in a 20% reduction in blower power consumption.

[0058] (6) After factory testing, the heat exchange efficiency was significantly improved, while the power and air consumption of the blower were significantly reduced. The heat exchange efficiency was improved by 10%, and the cooling air and power consumption were reduced by 20%.

[0059] In some implementations, the ventilation volume regulating device further includes a motor, a base plate, and a pressure transmitter; the motor is mounted on the base plate, and the motor engages with the outer edge of the rotating disk; the pressure transmitter is used to detect resistance data.

[0060] The present invention will be described in detail below through specific embodiments.

[0061] Example 1

[0062] like Figures 1-4 As shown, the ventilation volume regulating device provided in this embodiment constitutes an air volume regulating valve that can accurately regulate the air volume of each area of ​​the grate cooler, including a flange (12), a base plate (13), a rotating disc (14), blades (15), a stepper motor (16), a ventilation duct (17), and a pressure transmitter (18).

[0063] The ventilation duct (17) is connected to the grate (11) at the top via a flange (12), and to the bottom plate (13) at the bottom. A stepper motor (16) is fixed on the bottom plate (13). A support plate forms the bottom plate (13), and a rotating disk (14) is positioned between each blade (15) and the bottom plate (13). Each blade (15) has a first connecting part and a second connecting part. The first connecting part is a long screw (151), and the second connecting part is a short screw (152). The rotating disk (14) is equipped with a gear (141), a first track (142), and a second track (143). The first connecting part is located in the first track, and the second connecting part is located in the second track. The first track is an arc track, and the second track is a straight track. The blades (15) are connected to the bottom plate (13) and the rotating disk (14) via the long screw (151). The arc track is 35mm long and has an angle of 30°. The two sets of tracks make the blades more stable. The shape of the blades is not limited and can be set according to requirements, as long as the maximum and minimum opening are guaranteed. The number of blades can be 8.

[0064] The cooling fan blows air into the grate (11) sequentially through the rotating disk (14), blades (15), and ventilation duct (17). A pressure sensor (18) is installed inside the ventilation duct (17). By detecting the pressure data of each area, the stepper motor (16) drives the rotating disk (14) through meshing transmission. The rotating disk (14) drives the blades (15) to rotate. By rotating the blades (15) between the maximum and minimum ventilation opening positions, the ventilation area is adjusted to regulate the air volume, making the air volume distribution uniform and improving the heat exchange efficiency. The diameters of the maximum and minimum ventilation opening positions are not specifically limited and can be set according to requirements.

[0065] In practical implementation, the blades and rotating disc can be housed within a sealed protective casing to prevent jamming or malfunction due to material leakage or dust, thus extending the equipment's lifespan. The motor can be started periodically to rotate the adjusting disc and blades, preventing dust accumulation and jamming between the blades due to prolonged lack of adjustment. The motor rotation angle and blade opening can be adjusted based on the pressure detected by the pressure transmitter, avoiding problems such as poor airflow or incomplete adjustment caused by changes in operating conditions or flawed counterweight design. Furthermore, the airflow in each zone can be automatically adjusted based on pressure changes, and valve openings can be manually adjusted, offering ample operational flexibility. The device is compact, making installation and replacement convenient.

[0066] Example 2

[0067] like Figures 5-11 As shown, the ventilation volume regulating device provided in this embodiment constitutes an air volume regulating valve that can accurately regulate the air volume of each area of ​​the grate cooler, including a flange (22), a base plate (23), a rotating disc (24), blades (25), a stepper motor (26), a ventilation duct (27), and a pressure transmitter (28).

[0068] The ventilation duct (27) is connected to the grate (21) at the top via a flange (22), and to the base plate (23) at the bottom. A stepper motor (26) is fixed on the base plate (23), and the stepper motor meshes with the gear (241) of the rotating disk for transmission. A support plate forms the base plate (23); each blade is positioned between the rotating disk (24) and the base plate (23). The cylindrical screw (251) on the blade (25), which serves as the first connecting part, and the rectangular screw (252), which serves as the second connecting part, are respectively connected to the arc-shaped track (242) of the rotating disk (24) and the rectangular track (243) of the base plate (23). The number of blades can be nine.

[0069] The airflow from the cooling fan passes through the rotating disk (24), blades (25), and ventilation duct (27) into the grate (21). A pressure sensor (28) is installed inside the ventilation duct (27). By detecting the pressure data of each area, the stepper motor (26) drives the rotating disk (24), which in turn drives the blades (25) to rotate. The airflow is adjusted by regulating the ventilation area, so that the airflow is evenly distributed and the heat exchange efficiency is improved.

[0070] Example 3

[0071] like Figures 12-17 As shown, the ventilation volume regulating device provided in this embodiment constitutes an air volume regulating valve that can accurately regulate the air volume of each area of ​​the grate cooler, including a flange (32), a base plate (33), a rotating disc (34), blades (35), a support plate (36), a stepper motor (37), a ventilation duct (38), and a pressure transmitter (39).

[0072] The ventilation duct (38) is connected to the grate (31) at the top via a flange (32) and to the base plate (33) at the bottom. A stepper motor (37) is fixed on the base plate (33). Each blade is positioned between the support plate and the rotating disk. A cylindrical screw (351) serving as the first connecting part and a rectangular screw (352) serving as the second connecting part on the blade (35) are respectively connected to the polygonal track (342) of the support plate (36) and the fifth track (343) of the rotating disk (34). The support plate (36) is fixed to the base plate. The number of sides of the polygonal track is the same as the number of fifth tracks; each fifth track is a straight track and forms a preset angle with the side of the corresponding polygonal track. The number of blades can be eight.

[0073] The airflow from the cooling fan passes through the rotating disk (34), blades (35), and ventilation duct (38) into the grate (31). A pressure sensor (39) is installed inside the ventilation duct (38). By detecting the pressure data of each area, the stepper motor (37) drives the rotating disk (34) through the gear (341). The rotating disk (34) drives the blades (35) to rotate. The airflow is adjusted by adjusting the ventilation area, so that the airflow is evenly distributed and the heat exchange efficiency is improved.

[0074] Example 4

[0075] like Figures 18-23 As shown, the ventilation volume regulating device provided by this utility model constitutes an air volume regulating valve that can accurately regulate the air volume of each area of ​​the grate cooler, including a flange (42), a base plate (43), a rotating disk (44), blades (45), a fixed disk (46), a stepper motor (47), a rotating shaft (48), a ventilation duct (49), and a pressure transmitter (410).

[0076] The ventilation duct (49) is connected to the grate (41) at the top via a flange (42) and to the base plate (43) at the bottom. A stepper motor (47) is fixed on the base plate (43). The support plate forms the base plate (43); the fixed plate (46), rotating plate (44), blades, and base plate (43) are arranged in sequence. The screw (451) of the blade (5) is connected to the rotating plate (44) via a rotating shaft (48), the screw (451) is connected to the connecting hole (453) of the rotating shaft (48), and the connecting hole (454) of the rotating shaft (48) is connected to the connecting part (442) of the rotating plate. The screw (452) is connected to the fixing hole (443) on the base plate. The fixed plate (46) is used to protect the blades and connecting parts. There can be 5 blades.

[0077] The airflow blown in by the cooling fan enters the grate (41) through the rotating disk (44), blades (45) and ventilation duct (49) in sequence. A pressure sensor (410) is installed in the ventilation duct (49). By detecting the pressure data of each area, the stepper motor (47) drives the rotating disk (44). The rotating disk (44) drives the blades (45) to rotate through the rotating shaft (48). The airflow is adjusted by adjusting the ventilation area, so that the airflow is evenly distributed and the heat exchange efficiency is improved.

[0078] After factory testing, heat exchange efficiency was significantly improved, while power and air consumption of the blower were significantly reduced. Heat exchange efficiency increased by 10%, and cooling air and power consumption decreased by 20%.

[0079] The various embodiments of this utility model can achieve the following effects:

[0080] (1) The heat exchange efficiency of the grate cooler increases, the temperature of the secondary and tertiary air increases by 100℃ (stabilizing above 1200℃), the AQC intake air temperature increases by 30℃ (stabilizing above 420℃), and the clinker temperature exiting the grate cooler decreases by 50℃. The heat exchange efficiency of the grate cooler is improved by 10%.

[0081] (2) Standard coal consumption decreases, secondary and tertiary air temperatures increase, grate cooler recovers more heat into the kiln, and standard coal consumption decreases by 3-4 kgce / kg.cl.

[0082] (3) Increased waste heat power generation, with an increase of 30°C in AQC air intake temperature and increased air intake heat, leads to an increase of 2 kWh / t in waste heat power generation.

[0083] (4) Cooling air consumption is reduced, air is used more evenly in all areas of the grate cooler, and cooling air volume is reduced to below 1.4 Nm3 / kg.cl.

[0084] (5) Reduced power consumption of blower and cooling air, resulting in a 20% reduction in blower power consumption.

[0085] (6) After factory testing, the heat exchange efficiency was significantly improved, while the power and air consumption of the blower were significantly reduced. The heat exchange efficiency was improved by 10%, and the cooling air and power consumption were reduced by 20%.

[0086] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0087] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0088] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A ventilation volume regulating device, characterized in that, The ventilation volume regulating device includes a support plate, a rotating disk, and a preset number of blades; ventilation openings are provided at corresponding positions on the support plate and the rotating disk; each blade is provided with a first connecting part and a second connecting part; the first connecting part is connected to the rotating disk, and the second connecting part is connected to the support plate; The rotating disk is driven to rotate and drives each blade to rotate through the first connecting part, so as to adjust the opening of the ventilation port by rotating each blade.

2. The ventilation volume regulating device according to claim 1, characterized in that, The ventilation volume regulating device also includes a motor, a base plate, and a pressure transmitter; the motor is mounted on the base plate, and the motor and the outer edge of the rotating disk form a meshing transmission; the pressure transmitter is used to detect resistance data.

3. The ventilation volume regulating device according to claim 1 or 2, characterized in that, The support plate forms the base plate; the rotating disk is disposed between each blade and the base plate; the first connecting part connects the rotating disk and the base plate respectively; the rotating disk is provided with multiple first tracks and multiple second tracks; Each first connecting part is located in a first track, and each second connecting part is located in a second track.

4. The ventilation volume regulating device according to claim 3, characterized in that, The first track is an arc-shaped track, and the second track is a straight track.

5. The ventilation volume regulating device according to claim 1 or 2, characterized in that, The support plate forms the base plate; each blade is disposed between the rotating disk and the base plate; the rotating disk is provided with multiple third tracks, and the base plate is provided with multiple fourth tracks; each first connecting part is located in a third track, and each second connecting part is located in a fourth track.

6. The ventilation volume regulating device according to claim 5, characterized in that, The third track is an arc-shaped track, and the fourth track is a straight track.

7. The ventilation volume regulating device according to claim 2, characterized in that, Each blade is disposed between the support plate and the rotating disk, and the support plate is connected to the base plate; the rotating disk is provided with a polygonal track, and the base plate is provided with multiple fifth tracks; Each first connecting part is located in the polygonal track, and each second connecting part is located in a fifth track.

8. The ventilation volume regulating device according to claim 7, characterized in that, The number of sides of the polygonal track is the same as the number of fifth tracks; each fifth track is a straight track and forms a preset angle with the side of the corresponding polygonal track.

9. The ventilation volume regulating device according to claim 1 or 2, characterized in that, The ventilation volume regulating device also includes a fixed plate; the support plate forms a base plate; the fixed plate, the rotating plate, each blade and the base plate are arranged in sequence; the first connecting component is connected to the rotating plate through a rotating shaft, and the second connecting component is connected to the base plate.

10. A grate-type cooling device, characterized in that, The grate cooling device includes the ventilation volume regulating device as described in any one of claims 1-9.

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