Low emission dry process cement production line based on staged combustion

Abstract

The application discloses a low-emission dry-process cement production line based on hierarchical combustion and relates to the field of dry-process cement production, and specifically comprises a crushing box, a conveyor and a grinding box, the grinding box is connected with a drying box through a vacuum feeder one, and the drying box is connected with an air homogenizing box through a vacuum feeder two; in the cement clinker conveying link, a motor drives a conveyor belt to run, a side limiting roller is driven, a connecting shaft, a transmission shaft and a transmission piece are used to make a driving rod drive a crushing rod to rotate, so that the crushing and mixing of the clinker are realized; meanwhile, a V-shaped sieve plate intercepts clinkered clinker and guides the clinkered clinker to a crushing triangular area, a plurality of groups of the crushing rods work efficiently, the crushing uniformity is improved, and the production quality is ensured; in addition, the transmission shaft drives a fan to rotate, airflow passes through a temperature maintaining pipe to cool the crushing area, the residual heat generated by clinkering and crushing is eliminated, high temperature is avoided from affecting the subsequent process stability and product quality, crushing, screening and temperature control are cooperated, and the cement clinker processing efficiency and the finished product quality are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of dry process cement production technology, and more specifically, to a low-emission dry process cement production line based on staged combustion. Background Technology

[0002] In a staged combustion low-emission dry process cement production line, achieving low emissions and ensuring high-quality cement production are the core objectives. Although staged combustion technology effectively reduces emissions of pollutants such as nitrogen oxides through the operation of the calcining kiln, there are still key issues affecting overall production efficiency and product quality in the cement clinker conveying and subsequent processing stages.

[0003] In traditional cement clinker conveying processes, poor handling of agglomerated clinker and uneven crushing lead to insufficient material reaction in subsequent processes, affecting cement strength and other properties. In addition, the crushing of agglomerated cement clinker releases a large amount of residual heat, which can change the clinker composition, affect the stability of subsequent processes, and reduce product quality. Therefore, a solution is provided. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a low-emission dry process cement production line based on staged combustion.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a low-emission dry process cement production line based on staged combustion, comprising a crushing box, a conveyor and a grinding box, wherein the grinding box is connected to a drying box via a vacuum feeder one, the drying box is connected to an air homogenization box via a vacuum feeder two, the air homogenization box is connected to a calcining kiln for staged combustion of cement and low emissions via a vacuum feeder three, and the calcining kiln is connected to a cooling box via a vacuum feeder four. The bottom of the cooling box is equipped with a conveyor for conveying cement clinker. The conveyor includes two sets of conveyor wheels, and a conveyor belt is connected between the two sets of conveyor wheels. Multiple pairs of side limiting members are provided on the outer side of the conveyor belt. Each pair of side limiting members consists of two sets of side limiting rollers symmetrically arranged on both sides of the conveyor belt. A connecting shaft is provided at the center of the side limiting rollers, and a crushing member for crushing cement clinker lumps is provided on the outer side of the connecting shaft. The crushing component includes a transmission shaft fixedly connected to the connecting shaft. The transmission shaft is connected to a drive rod via a transmission component. The drive rod is rotatably connected to a support plate via a mounting plate. The end of the drive rod is provided with a crushing rod for crushing agglomerated cement clinker. A V-shaped screen plate is provided between the two crushing rods. The side of the V-shaped screen plate and the crushing rods form a crushing triangular zone for crushing agglomerated cement clinker. The outer side of the broken triangle area is provided with a cooling element to reduce the residual heat of the agglomeration.

[0006] Furthermore, the cooling component includes a fan fixedly connected to the outer wall of the drive shaft, and a gathering shroud for gathering the fan wind speed is rotatably provided on the outer side of the drive shaft. A temperature-regulating tube is connected to the output side of the gathering shroud, and the output end of the temperature-regulating tube is set towards the crushing triangle area.

[0007] Furthermore, the transmission component consists of two sets of transmission wheels. One set of transmission wheels is fixedly connected to the connecting shaft, and the other set of transmission wheels is fixedly connected to the drive rod. The two sets of transmission wheels are connected by a transmission belt.

[0008] Furthermore, a drive shaft is provided at the center of the conveyor wheel, and a support frame for supporting the conveyor belt is provided on the outer side of the two drive shafts, which rotate together. A motor for driving the drive shafts to rotate is provided on the support frame.

[0009] Furthermore, the end of the connecting shaft is rotatably engaged with the support frame via a support plate, and a bottom limiting roller supporting the conveyor belt is provided directly below the conveyor belt, the bottom limiting roller being rotatably connected to the support frame.

[0010] Furthermore, the multiple sets of V-shaped screen plates are fixedly connected by top rods, and the top rods are fixedly connected to the support frame by L-bars.

[0011] The low-emission dry-process cement production line based on staged combustion includes the following steps in the cement clinker conveying process: Conveyor belt conveying clinker: The motor drives the conveyor belt to operate continuously, stably transporting cement clinker to the subsequent processing stage, ensuring the continuity of material transmission and providing a foundation for subsequent processing; Screen plate guides agglomerated material: The V-shaped screen plate on the conveyor belt intercepts and screens agglomerated clinker, and precisely guides it to the crushing triangular area on both sides of the V-shaped screen plate to achieve centralized processing of agglomerated material; High-efficiency crushing with crushing rods: The side limit roller drive drives the crushing rods to rotate, and multiple sets of crushing rods operate synchronously in the crushing triangle zone to efficiently crush and mix agglomerated clinker, thereby improving the uniformity of crushing. Rapid heat reduction via airflow: The drive shaft rotates synchronously to drive the fan, and the airflow is guided through the heat pipe to the crushing triangle area, which quickly reduces the residual heat of the clinker crushing process, ensuring the stability of subsequent processes and product quality.

[0012] The technical effects and advantages of this invention are as follows: This invention involves a motor-driven conveyor belt that continuously transports clinker to subsequent processing stages. During the conveyor belt's operation, side limiting rollers are synchronously driven, which in turn drives the connecting shaft and transmission shaft to rotate. The transmission shaft transmits power to the drive rod through a transmission component, and the drive rod then drives the crushing rod to rotate, thereby achieving the crushing and mixing of cement clinker. The V-shaped screen plate on the conveyor belt can intercept and screen agglomerated clinker, guiding it to the crushing triangular zones on both sides of the screen plate. Multiple sets of crushing rods operate synchronously, efficiently crushing the agglomerated clinker within the crushing triangular zones. This design significantly improves the uniformity of cement clinker crushing, thereby ensuring overall production quality.

[0013] This invention synchronously drives the fan to rotate when the drive shaft rotates. The airflow generated by the fan is guided through the heat pipe to the crushing triangle area, which quickly cools down the residual heat released during the crushing of agglomerated cement clinker, thus avoiding the impact of high internal temperature on the stability of subsequent processes or product quality.

[0014] In the cement clinker conveying process, this invention uses a motor-driven conveyor belt, which in turn drives the side limit rollers. Through a connecting shaft, transmission shaft, and transmission components, the drive rod rotates the crushing rod, achieving clinker crushing and mixing. Simultaneously, a V-shaped screen plate intercepts agglomerated clinker and guides it to the crushing triangle zone. Multiple sets of crushing rods operate efficiently, improving crushing uniformity and ensuring production quality. Furthermore, the transmission shaft drives a fan to rotate, and the airflow passes through a temperature-controlled pipe to cool the crushing zone, eliminating residual heat generated during agglomerated clinker crushing and preventing high temperatures from affecting the stability of subsequent processes and product quality. This achieves synergy between crushing, screening, and temperature control, effectively improving cement clinker processing efficiency and finished product quality. Attached Figure Description

[0015] Figure 1 This is a flowchart of the dry process cement production in this invention.

[0016] Figure 2 This is a perspective view showing the positional relationship between the crushing rod and the conveyor belt in this invention.

[0017] Figure 3 This is a perspective view of the overall structure of the crushing component in this invention.

[0018] Figure 4 This is a three-dimensional view of the overall structure of the broken triangular region in this invention.

[0019] Figure 5 This is a schematic diagram showing the connection relationship between the crushed parts, the V-shaped screen plate, and the conveyor belt.

[0020] Figure 6 This is a three-dimensional view showing the positional relationship between the side limiting roller and the bottom limiting roller in the conveyor.

[0021] Figure 7 This is a perspective view of the overall structure of the conveyor in this invention.

[0022] The attached diagram is labeled as follows: 1. Crushing box; 2. Conveyor; 3. Grinding box; 4. Vacuum feeder one; 5. Drying box; 6. Vacuum feeder two; 7. Air homogenization box; 8. Vacuum feeder three; 9. Calcination kiln; 10. Vacuum feeder four; 11. Cooling box; 12. Conveying component; 121. Conveyor belt; 122. Side limiting roller; 123. Support plate; 124. Support frame; 125. Bottom limiting roller; 01. Mounting plate; 02. Transmission component; 03. Drive rod; 04. Crushing rod; 05. Top rod; 06. V-shaped screen plate; 07. Gathering hood; 08. Heat pipe; 09. Fan. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1: Please refer to Figures 1-7 As shown, the following solutions can be used to address the problem that in the traditional cement clinker conveying process, the clinker is not handled well and is not crushed evenly, which leads to insufficient material reaction in subsequent processes and affects the strength and other properties of cement. The low-emission dry process cement production line based on staged combustion in this embodiment includes a crushing box 1, a conveyor 2, and a grinding box 3. The grinding box 3 is connected to a drying box 5 via a vacuum feeder 4. The drying box 5 is connected to an air homogenization box via a vacuum feeder 6. The air homogenization box is connected to a calcining kiln 9 via a vacuum feeder 8, thereby achieving staged combustion of dry process cement and low emissions, which is in line with existing technology. The calcining kiln 9 is connected to a cooling box 11 via a vacuum feeder 10. The bottom of the cooling box 11 is equipped with a conveyor 12 for conveying cement clinker. From the above, we can see that a dry process cement production line is: S1: Place the limestone into the crushing box 1 and start the crushing component inside. The crushing component will crush the limestone. S2: The crushed limestone is conveyed to the grinding box 3 by the conveyor 2, and clay and other auxiliary materials are added to the grinding box 3. The grinding box 3 then grinds the limestone, clay and other auxiliary materials. S3: Vacuum feeder 4 works to transport the raw material ground into powder in the grinding box 3 to the drying box 5. The drying box 5 heats and dries the raw material in the drying box 5. S4: Vacuum feeder 6 conveys the dried material in drying box 5 to air homogenization box 7 for further air mixing and homogenization of raw material and storage of raw material; S5: Vacuum feeder 8 transports the raw material in the air homogenization box to the calcining kiln 9 for calcination, turning the raw material into cooked material; S6: Cement clinker is conveyed to the cooling box 11 by the vacuum feeder 10 for cooling and then discharged onto the conveyor 12; The conveyor 12 includes two sets of conveyor wheels, and a conveyor belt 121 is connected between the two sets of conveyor wheels. Multiple pairs of side limiting members are provided on the outer side of the conveyor belt 121. Each pair of side limiting members consists of two sets of side limiting rollers 122 symmetrically arranged on both sides of the conveyor belt 121. A connecting shaft is provided at the center of the side limiting rollers 122. A crushing component for crushing cement clinker is provided on the outer side of the connecting shaft. The crushing component includes a transmission shaft fixedly connected to the connecting shaft. The transmission shaft is connected to a drive rod 03 via a transmission component 02. The drive rod 03 is rotatably connected to the support plate 123 via a mounting plate 01. The end of the drive rod 03 is provided with a crushing rod 04 for crushing agglomerated cement clinker. A V-shaped screen plate 06 is provided between the two crushing rods 04. The side of the V-shaped screen plate 06 and the crushing rods 04 form a crushing triangular area for crushing agglomerated cement clinker. The transmission component 02 consists of two sets of transmission wheels. One set of transmission wheels is fixedly connected to the connecting shaft, and the other set of transmission wheels is fixedly connected to the drive rod 03. The two sets of transmission wheels are connected by a transmission belt. In this embodiment, during the cement clinker conveying process, the motor drives the conveyor belt 121 to operate continuously, conveying the clinker to the subsequent processing stage. During the operation of the conveyor belt 121, the side limiting roller 122 is synchronously driven with the conveyor belt 121, thereby driving the connecting shaft and the transmission shaft to rotate. The transmission shaft transmits power to the drive rod 03 through the transmission component 02, and the drive rod 03 then drives the crushing rod 04 to rotate, thereby realizing the crushing and mixing of the cement clinker. The V-shaped screen plate 06 installed on the conveyor belt 121 can intercept and screen agglomerated clinker, guiding it to the crushing triangular area on both sides of the screen plate. Multiple sets of crushing rods 04 operate synchronously to efficiently crush the agglomerated clinker in the crushing triangular area. This design can significantly improve the crushing uniformity of cement clinker, thereby ensuring the overall production quality. Example 2: Please refer to Figures 1-7 As shown, the problem that crushing lumpy cement clinker releases a large amount of residual heat, which alters the clinker composition, affects the stability of subsequent processes, and reduces product quality can be solved by the following solutions. Cooling components are provided on the outer side of the fractured triangular zone to reduce the residual heat from agglomeration in that area; The cooling component includes a fan 09 fixedly connected to the outer wall of the drive shaft. A gathering cover 07 that gathers the wind speed of the fan 09 is also rotatably provided on the outside of the drive shaft. A temperature-maintaining tube 08 is connected to the output side of the gathering cover 07, and the output end of the temperature-maintaining tube 08 is set towards the crushing triangle area.

[0025] In this embodiment: when the drive shaft rotates, it synchronously drives the fan 09 to rotate. The airflow generated by the fan 09 is guided to the crushing triangle area through the heat pipe 08 to quickly cool down the residual heat released during the crushing of the agglomerated cement clinker, so as to avoid the internal high temperature from affecting the stability of subsequent processes or product quality. A drive shaft is provided at the center of the conveyor wheel, and a support frame 124 is provided on the outer side of the two drive shafts to support the conveyor belt 121. A motor that drives the drive shaft to rotate is provided on the support frame 124. The end of the connecting shaft is rotatably engaged with the support frame 124 via the support plate 123. A bottom limiting roller 125 supporting the conveyor belt 121 is provided directly below the conveyor belt 121. The bottom limiting roller 125 is rotatably connected to the support frame 124. Multiple sets of V-shaped screen plates 06 are fixedly connected by top rods 05, and the top rods 05 are fixedly connected to the support frame 124 by L rods.

[0026] As can be seen from Embodiments 1 and 2 of this invention: in the cement clinker conveying process, the motor drives the conveyor belt 121 to run, and the side limiting roller 122 is driven accordingly. Through the connecting shaft, transmission shaft, and transmission component 02, the drive rod 03 drives the crushing rod 04 to rotate, thereby realizing the crushing and mixing of clinker. At the same time, the V-shaped screen plate 06 intercepts the agglomerated clinker and guides it to the crushing triangle area. Multiple sets of crushing rods 04 operate efficiently, improving the uniformity of crushing and ensuring production quality. In addition, the drive shaft drives the fan 09 to rotate, and the airflow passes through the temperature control tube 08 to cool the crushing zone, eliminating the residual heat generated by the crushing of agglomerates, avoiding the impact of high temperature on the stability of subsequent processes and product quality, realizing the synergy of crushing, screening and temperature control, and effectively improving the processing efficiency and finished product quality of cement clinker.

[0027] In summary: In the cement clinker conveying and processing system, the motor-driven conveyor belt 121 operates continuously, transporting clinker to subsequent stages. During the conveying process, the side limiting rollers 122 are synchronously driven with the conveyor belt 121, and drive the transmission shaft to rotate through the connecting shaft. The transmission shaft transmits power to the drive rod 03 through the transmission component 02, and the drive rod 03 then drives the crushing rod 04 to rotate, realizing the crushing and mixing of clinker. The system is specially designed with a V-shaped screen plate 06, which can intercept agglomerated clinker and guide it to the crushing triangular areas on both sides. Multiple sets of crushing rods 04 work synchronously to efficiently crush agglomerated clinker, significantly improving the uniformity of crushing, providing high-quality raw materials for subsequent processes, and ensuring the overall production quality.

[0028] In addition, the system integrates waste heat control. When the drive shaft rotates, it synchronously drives the fan 09 to rotate. The generated airflow is precisely guided to the crushing triangle area through the temperature control tube 08 to quickly cool down the residual heat released during the crushing process. This design effectively avoids the impact of high internal temperature on subsequent processes, such as preventing excessively high internal temperature from causing gypsum dehydration and avoiding equipment damage due to thermal stress. At the same time, it ensures stable cement performance and improves product qualification rate. Through the synergistic optimization of crushing and temperature control, the system achieves high efficiency, uniformity and stability in cement clinker processing, providing a reliable guarantee for the production of high-quality cement products.

[0029] Obviously, many modifications and variations can be made based on the content of this specification. These embodiments have been selected and specifically described in this specification to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A low-emission dry-process cement production line based on staged combustion, comprising a crushing box (1), a conveyor (2), and a grinding box (3), wherein the grinding box (3) is connected to a drying box (5) via a vacuum feeder (4), the drying box (5) is connected to an air homogenization box (7) via a vacuum feeder (6), the air homogenization box (7) is connected to a calcining kiln (9) for staged combustion and low emissions of cement via a vacuum feeder (8), and the calcining kiln (9) is connected to a cooling box (11) via a vacuum feeder (10), characterized in that: The bottom of the cooling box (11) is provided with a conveyor (12) for conveying cement clinker. The conveyor (12) includes two sets of conveyor wheels. A conveyor belt (121) is connected between the two sets of conveyor wheels. Multiple pairs of side limiting members are provided on the outer side of the conveyor belt (121). Each pair of side limiting members consists of two sets of side limiting rollers (122) symmetrically arranged on both sides of the conveyor belt (121). A connecting shaft is provided at the center of the side limiting rollers (122). A crushing member for crushing cement clinker lumps is provided on the outer side of the connecting shaft. The crushing component includes a transmission shaft fixedly connected to the connecting shaft. The transmission shaft is connected to a drive rod (03) via a transmission component (02). The drive rod (03) is rotatably connected to a support plate (123) via a mounting plate (01). The end of the drive rod (03) is provided with a crushing rod (04) for crushing agglomerated cement clinker. A V-shaped screen plate (06) is provided between the two crushing rods (04). The side of the V-shaped screen plate (06) and the crushing rod (04) form a crushing triangular area for crushing agglomerated cement clinker. The outer side of the broken triangle area is provided with a cooling element to reduce the residual heat of the agglomeration.

2. The low-emission dry process cement production line based on staged combustion according to claim 1, characterized in that: The cooling component includes a fan (09) fixedly connected to the outer wall of the drive shaft. The outer side of the drive shaft is also provided with a gathering cover (07) that gathers the wind speed of the fan (09). The output side of the gathering cover (07) is connected to a heat-retaining tube (08), and the output end of the heat-retaining tube (08) is set towards the crushing triangle area.

3. The low-emission dry process cement production line based on staged combustion according to claim 1, characterized in that: The transmission component (02) consists of two sets of transmission wheels. One set of transmission wheels is fixedly connected to the connecting shaft, and the other set of transmission wheels is fixedly connected to the drive rod (03). The two sets of transmission wheels are connected by a transmission belt.

4. The low-emission dry process cement production line based on staged combustion according to claim 1, characterized in that: A drive shaft is provided at the center of the conveyor wheel, and a support frame (124) for supporting the conveyor belt (121) is provided on the outer side of the two drive shafts. A motor for driving the drive shafts to rotate is provided on the support frame (124).

5. The low-emission dry process cement production line based on staged combustion according to claim 1, characterized in that: The end of the connecting shaft is rotatably engaged with the support frame (124) via the support plate (123). A bottom limiting roller (125) supporting the conveyor belt (121) is provided directly below the conveyor belt (121), and the bottom limiting roller (125) is rotatably connected to the support frame (124).

6. The low-emission dry process cement production line based on staged combustion according to claim 4, characterized in that: The multiple sets of V-shaped screen plates (06) are fixedly connected by top rods (05), and the top rods (05) are fixedly connected to the support frame (124) by L rods.

7. The low-emission dry process cement production line based on staged combustion according to any one of claims 1-6, characterized in that: This low-emission dry-process cement production line based on staged combustion includes the following steps in the cement clinker conveying process: Conveyor belt (121) transports clinker: The motor drives the conveyor belt (121) to operate continuously, stably transporting cement clinker to the subsequent processing stage, ensuring the continuity of material transmission and providing a foundation for subsequent processing; Screen plate guides agglomerated material: V-shaped screen plate (06) on conveyor belt (121) intercepts and screens agglomerated clinker and precisely guides it to the crushing triangle area on both sides of V-shaped screen plate (06) to achieve centralized processing of agglomerated material; High-efficiency crushing of crushing rod (04): The side limiting roller (122) drives the crushing rod (04) to rotate. Multiple sets of crushing rods (04) operate synchronously in the crushing triangle area to efficiently crush and mix the agglomerated clinker and improve the uniformity of crushing. Rapid heat reduction by airflow: The drive shaft rotates synchronously to drive the fan (09), and the airflow is guided through the heat pipe (08) to the crushing triangle area, which rapidly reduces the residual heat of the clinker crushing and ensures the stability of subsequent processes and product quality.

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