Preheater chute dust collection air pipe regulation system with uniform pressure distribution

Abstract

The utility model discloses a pressure distribution even's into preheater chute dust collection air pipe regulation and control system, it includes: rectifier cavity, shunt adjusting component, pressure balance module, dynamic monitoring unit and feedback control device. The rectifier cavity is equipped with the flow guide plate group to the airflow step by step rectification, and shunt adjusting component passes through adjustable shunt piece dynamic adjustment airflow direction, and pressure balance module utilizes the flexible diaphragm compensation local pressure fluctuation. Dynamic monitoring unit real -time acquisition pressure and temperature data, and feedback control device controls shunt piece angle accurately. Auxiliary flow optimization component passes through micro -eddy current generator and optimizes the airflow characteristic. The system effectively improves dust removal efficiency, reduces energy consumption, prolongs the life, has higher practicality and popularization value.

Description

Technical Field

[0001] This utility model relates to the technical field of cement production and environmental protection equipment, and in particular to a pressure distribution uniform dust collection duct control system for the inclined trough of the preheater. Background Technology

[0002] To improve industrial production efficiency and reduce energy consumption, preheater systems are widely used in cement, chemical, and other fields. The dust collection duct in the inclined trough of the preheater is a key component, and the uniformity of its internal pressure distribution directly affects the dust removal efficiency and the overall operational stability of the system. However, in actual use, limitations in duct structure design and control methods can easily lead to uneven pressure distribution, thus affecting dust removal efficiency and potentially causing increased energy consumption or localized blockages during equipment operation. To address this, we propose a pressure-uniformly distributed dust collection duct control system for the inclined trough of the preheater to optimize pressure distribution and improve system performance. Utility Model Content

[0003] The purpose of this utility model is to provide a pressure distribution uniform dust collection duct control system for the inclined channel of the preheater, which solves the problems mentioned in the background art.

[0004] This invention is implemented as follows: a pressure-distributed dust collection duct control system for a preheater inclined trough, comprising a rectifier cavity, a flow-dividing adjustment component, a pressure balancing module, a dynamic monitoring unit, and a feedback control device. The rectifying cavity is located at the duct inlet and contains a guide plate assembly. The guide plate assembly is connected to the inner wall of the rectifying cavity via a fixed bracket, and the arrangement of the guide plate assembly forms a certain angle with the duct axis. The flow diversion adjustment assembly is installed at the rear end of the rectifying cavity and consists of multiple adjustable flow diversion plates. Each flow diversion plate is hinged to the inner wall of the duct via a rotating shaft and its angle is adjusted by an external drive mechanism. The pressure balance module is located behind the flow diversion adjustment assembly and includes multiple pressure compensation chambers and a flexible diaphragm. The pressure compensation chambers are fixedly connected to the inner wall of the duct via flanges, and the flexible diaphragm is embedded inside the pressure compensation chambers and contacts the airflow in the duct. The dynamic monitoring unit is located at the duct outlet and includes a pressure sensor array and a temperature sensor. The feedback control device is electrically connected to the dynamic monitoring unit and is used to receive data collected by the sensors and output control signals to the drive mechanism of the flow diversion adjustment assembly.

[0005] Furthermore, a pressure-distributed preheater inclined trough dust collection duct control system also includes: an auxiliary flow optimization component, which is disposed between the rectifier cavity and the flow distribution adjustment component. It consists of multiple micro vortex generators, which are fixed to the inner wall of the duct by bolts, and their vortex direction forms a spiral disturbance with the mainstream direction of the duct.

[0006] Furthermore, the guide vane assembly includes an upper guide vane, a middle guide vane, and a lower guide vane. The upper guide vane, the middle guide vane, and the lower guide vane are connected to the inner wall of the rectifier cavity through fixed supports of different heights, and the spacing between each guide vane gradually decreases along the duct axis to achieve step-by-step compression and rectification of the airflow.

[0007] Furthermore, the pressure compensation chamber includes a left compensation unit and a right compensation unit. The left compensation unit and the right compensation unit are respectively connected to the inner wall of the air duct through independent flexible diaphragms, and the thickness of the flexible diaphragms is between 0.5mm and 1mm, and the material is high-temperature resistant silicone.

[0008] Furthermore, the number of adjustable diverter plates in the diversion adjustment assembly is even, and the initial angle difference between adjacent diverter plates is 15° to 30°. The surface of the diverter plates is coated with a low friction coefficient coating to reduce resistance loss when airflow passes through.

[0009] Furthermore, the pressure sensor array in the dynamic monitoring unit includes multiple distributed pressure sensors, which are uniformly arranged along the cross-section of the duct, and each pressure sensor has a measurement range of 0 kPa to 20 kPa and an accuracy of ±0.1 kPa; the temperature sensor is a thermocouple sensor with a response time of 1 ms to 5 ms.

[0010] Furthermore, the feedback control device includes a data processing module and an execution module. The data processing module receives signals transmitted by the dynamic monitoring unit and performs real-time analysis. The analysis results are output to the drive mechanism of the shunt adjustment component through the execution module. The drive mechanism adjusts the angle of the shunt plate from 0° to 45° according to the input signal.

[0011] Furthermore, the inlet end of the rectifier cavity is provided with a tapered transition section with a cone angle of 10° to 20°. Its outer wall is connected to the inlet end of the air duct by welding, and the inner wall of the tapered transition section is sprayed with a wear-resistant ceramic coating to improve its service life.

[0012] Furthermore, the edge of the flexible diaphragm is fixedly connected to the inner wall of the pressure compensation cavity via a clamping ring. The clamping ring is made of stainless steel and is locked by a threaded connection to ensure the sealing performance between the flexible diaphragm and the pressure compensation cavity.

[0013] Furthermore, the number of micro vortex generators is 6 to 12, and the angle between the central axis of each micro vortex generator and the duct axis is 30° to 45°. The surface of the micro vortex generator is polished to reduce the turbulence intensity when the airflow passes through.

[0014] Compared with existing technologies, the beneficial effects of this invention are as follows: This invention provides a pressure-uniformly distributed dust collection duct control system for the inclined trough of the preheater. The airflow is rectified step-by-step by the guide plate assembly within the rectifier cavity, and the flow direction is dynamically adjusted by the flow-dividing adjustment component, achieving uniform pressure distribution within the duct. The flexible diaphragm in the pressure balancing module compensates for local pressure fluctuations, preventing blockages caused by uneven pressure. The dynamic monitoring unit collects real-time pressure and temperature data inside the duct and transmits the data to the feedback control device for analysis, thereby achieving precise control of the flow-dividing adjustment component. The micro-vortex generator in the auxiliary flow optimization component further optimizes the airflow characteristics by disturbing the airflow. This invention not only improves dust removal efficiency but also significantly reduces energy consumption during equipment operation and extends the service life of the duct system, possessing high practicality and promotional value. Attached Figure Description

[0015] Figure 1 This is a block diagram of the overall architecture of a pressure distribution uniformly distributed dust collection duct control system for the inclined channel of the preheater;

[0016] Figure 2 A detailed structural block diagram of the rectifying cavity and guide plate assembly of a preheater inclined trough dust collection duct control system with uniform pressure distribution;

[0017] Figure 3 This invention relates to a diversion adjustment component and adjustable diversion plate structure for a pressure distribution uniformly distributed dust collection duct control system for a preheater inclined groove.

[0018] Figure 4 A block diagram of the pressure balance module and the diaphragm structure of a pressure distribution uniformly distributed dust collection duct control system for a preheater inclined groove.

[0019] Figure 5 This is a dynamic monitoring unit and sensor structure for a preheater inclined trough dust collection duct control system with uniform pressure distribution.

[0020] Figure 6 This is the internal structure of a feedback control device for a preheater inclined trough dust collection duct control system with uniform pressure distribution.

[0021] The attached figures are labeled as follows:

[0022] 1. Rectifying cavity; 2. Baffle plate assembly; 3. Flow splitting and regulating component; 4. Adjustable flow splitter; 5. Pressure balancing module; 6. Flexible diaphragm; 7. Dynamic monitoring unit; 8. Pressure sensor array; 9. Temperature sensor; 10. Feedback control device; 11. Auxiliary flow optimization component; 12. Micro eddy current generator. Detailed Implementation

[0023] like Figure 1 As shown, this utility model provides a pressure-distributed preheater inclined trough dust collection duct control system, which includes a rectifying cavity 1, a guide plate assembly 2, a flow distribution adjustment component 3, an adjustable flow divider 4, a pressure balancing module 5, a flexible diaphragm 6, a dynamic monitoring unit 7, a pressure sensor array 8, a temperature sensor 9, a feedback control device 10, an auxiliary flow optimization component 11, and a micro vortex generator 12. The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0024] A rectifier cavity 1 is located at the inlet end of the duct, and its inlet end has a conical transition section with a cone angle of 10° to 20°. The conical transition section is connected to the inlet end of the duct by welding, and its inner wall is coated with a wear-resistant ceramic coating. A guide vane assembly 2 is installed inside the rectifier cavity 1. The guide vane assembly 2 includes an upper guide vane, a middle guide vane, and a lower guide vane. The upper, middle, and lower guide vanes are connected to the inner wall of the rectifier cavity 1 by fixed supports of different heights. The fixed supports are bolted to ensure the stability of the guide vane assembly 2 within the rectifier cavity 1. The spacing between each layer of guide vanes gradually decreases along the duct axis to achieve progressive compression and rectification of the airflow. The arrangement direction of the guide vane assembly 2 forms a certain angle with the duct axis, ranging from 30° to 60°, so that the airflow entering the rectifier cavity 1 can be gradually guided and rectified.

[0025] The flow diversion adjustment assembly 3 is installed at the rear end of the rectifying cavity 1 and consists of multiple adjustable flow diversion vanes 4. The number of adjustable flow diversion vanes 4 is even, and the initial angle difference between adjacent vanes is 15° to 30°. Each adjustable flow diversion vane 4 is hinged to the inner wall of the duct via a rotating shaft. Both ends of the rotating shaft are fixed to the inner wall of the duct via bearing seats, ensuring smooth rotation of the adjustable flow diversion vane 4. The surface of the adjustable flow diversion vane 4 is coated with a low-friction coefficient coating made of polytetrafluoroethylene (PTFE) to reduce airflow resistance. An external drive mechanism is connected to the rotating shaft via a connecting rod. The drive mechanism is driven by a motor, and the output shaft of the motor is connected to the connecting rod via gear transmission, thereby achieving angle adjustment of the adjustable flow diversion vane 4.

[0026] The pressure balancing module 5 is located behind the flow distribution regulating component 3. It includes a left compensation unit and a right compensation unit, which are fixedly connected to the inner wall of the duct via flanges. The flanges are bolted together, and a sealing gasket is installed between the flange and the inner wall of the duct to ensure a tight seal. A flexible diaphragm 6 is embedded inside the pressure compensation chamber and comes into contact with the airflow in the duct. The flexible diaphragm 6 has a thickness of 0.5mm to 1mm and is made of high-temperature resistant silicone material. The edge of the flexible diaphragm 6 is fixedly connected to the inner wall of the pressure compensation chamber via a clamping ring. The clamping ring is made of stainless steel and is locked using a threaded connection to ensure a tight seal between the flexible diaphragm 6 and the pressure compensation chamber.

[0027] The dynamic monitoring unit 7 is located at the outlet end of the duct and includes a pressure sensor array 8 and a temperature sensor 9. The pressure sensor array 8 comprises multiple distributed pressure sensors, uniformly arranged along the cross-section of the duct. Each distributed pressure sensor is fixed to the inner wall of the duct with bolts. The distributed pressure sensors have a measurement range of 0 kPa to 20 kPa and an accuracy of ±0.1 kPa. Their signal output terminals are connected to the feedback control device 10 via cables. The temperature sensor 9 is a thermocouple sensor with a response time of 1 ms to 5 ms. The temperature sensor 9 is fixed to the inner wall of the duct with bolts, and its signal output terminal is also connected to the feedback control device 10 via cables.

[0028] The feedback control device 10 includes a data processing module and an execution module. The data processing module receives signals transmitted from the dynamic monitoring unit 7 and performs real-time analysis. The analysis results are output to the drive mechanism of the shunt adjustment component 3 through the execution module. The execution module is connected to the drive mechanism via a cable. The drive mechanism adjusts the angle of the adjustable shunt plate 4 from 0° to 45° according to the input signal.

[0029] An auxiliary flow optimization component 11 is disposed between the rectifying cavity 1 and the flow splitting adjustment component 3, and it consists of multiple micro vortex generators 12. The number of micro vortex generators 12 is 6 to 12, and each micro vortex generator 12 is fixed to the inner wall of the duct by bolts. The angle between the central axis of the micro vortex generator 12 and the axis of the duct is 30° to 45°. The surface of the micro vortex generator 12 is polished to reduce the turbulence intensity when airflow passes through. The micro vortex generator 12 optimizes the airflow characteristics by creating a spiral disturbance with its vortex direction relative to the mainstream direction of the duct.

[0030] In actual operation, the airflow enters the rectifying cavity 1 from the duct inlet, first passing through a conical transition section before entering the guide plate assembly 2. The guide plate assembly 2 compresses and rectifyes the airflow in stages, resulting in a relatively uniform flow state before entering the flow splitting and regulating assembly 3. The adjustable flow splitter 4 in the flow splitting and regulating assembly 3 dynamically adjusts its angle according to the instructions of the feedback control device 10, thereby changing the direction and distribution of the airflow and further optimizing the pressure distribution. After passing through the flow splitting and regulating assembly 3, the airflow enters the pressure balancing module 5. The flexible diaphragm 6 in the pressure balancing module 5 compensates for local pressure fluctuations, preventing blockages caused by uneven pressure. The pressure sensor array 8 and temperature sensor 9 in the dynamic monitoring unit 7 collect pressure and temperature data inside the duct in real time and transmit the data to the feedback control device 10 for analysis. The feedback control device 10 outputs a control signal to the drive mechanism of the flow splitting and regulating assembly 3 based on the analysis results, thereby achieving precise control of the adjustable flow splitter 4. The micro vortex generator 12 in the auxiliary flow optimization assembly 11 disturbs the airflow, further optimizing the flow characteristics and improving the overall performance of the system.

[0031] Through the above structural design and operation process, this utility model achieves uniform pressure distribution inside the duct, avoids blockage caused by uneven pressure, optimizes airflow characteristics, improves dust removal efficiency, and reduces energy consumption during equipment operation.

[0032] To enable those skilled in the art to fully understand and implement this utility model, the specific implementation principle of this utility model is further explained below in conjunction with a specific application scenario.

[0033] In actual industrial production, taking the preheater system of a cement plant as an example, the dust collection duct of the inclined chute into the preheater suffers from uneven pressure distribution due to long-term operation, resulting in reduced dust removal efficiency and localized blockages. To solve these problems, this control system is used for optimization and improvement.

[0034] First, the conical transition section plays a crucial role when airflow enters the rectifying cavity 1 from the duct inlet. The conical transition section has a cone angle ranging from 10° to 20° and is connected to the duct inlet by welding. Its inner wall is coated with a wear-resistant ceramic coating, effectively reducing wear caused by airflow impact and extending its service life. After passing through the conical transition section, the airflow smoothly enters the guide vane assembly 2. The guide vane assembly 2 consists of an upper guide vane, a middle guide vane, and a lower guide vane. The spacing between each layer of guide vanes gradually decreases along the duct axis, thus achieving staged compression and rectification. The arrangement of the guide vane assembly 2 forms an angle of 30° to 60° with the duct axis, allowing the airflow to form a relatively uniform flow state before entering the flow distribution and adjustment component 3. This process, through the staged rectification effect of the guide vane assembly 2, significantly reduces the degree of airflow turbulence, laying the foundation for subsequent pressure balancing.

[0035] Subsequently, the airflow enters the diversion and adjustment assembly 3, where the adjustable diversion vanes 4 dynamically adjust their angles according to the instructions of the feedback control device 10. Initially, the angle difference between adjacent vanes is set to 15° to 30° and is precisely adjusted via an external drive mechanism. Each adjustable diversion vane 4 is coated with a low-friction coefficient coating made of polytetrafluoroethylene (PTFE) to reduce airflow resistance. The external drive mechanism transmits the motor's rotational motion to the connecting rod via gear transmission, thereby driving the adjustable diversion vanes 4 to rotate smoothly. The angle variation range of the diversion vanes is 0° to 45°, further optimizing the pressure distribution inside the duct by changing the direction and distribution of the airflow. This design ensures that the airflow has more uniform dynamic characteristics before entering the next module.

[0036] Next, the airflow enters the pressure balancing module 5, where a flexible diaphragm 6 compensates for local pressure fluctuations. The flexible diaphragm 6, embedded inside the pressure compensation chamber, is 0.5mm to 1mm thick and made of high-temperature resistant silicone material, capable of long-term operation under high-temperature conditions. The edges of the flexible diaphragm 6 are fixed by stainless steel clamping rings and locked with threaded connections to ensure a tight seal between it and the pressure compensation chamber. When local pressure fluctuates, the flexible diaphragm 6 undergoes elastic deformation, changing the chamber volume to balance the pressure difference and prevent blockage caused by uneven pressure. This design effectively solves equipment operation problems caused by excessively high or low local pressure.

[0037] Meanwhile, the dynamic monitoring unit 7 collects pressure and temperature data inside the duct in real time. The pressure sensor array 8 is uniformly arranged along the duct's cross-section, with each distributed pressure sensor measuring from 0 kPa to 20 kPa with an accuracy of ±0.1 kPa, accurately reflecting the pressure distribution inside the duct. The temperature sensor 9 uses a thermocouple sensor with a response time of 1 ms to 5 ms, enabling rapid capture of temperature changes. The collected data is transmitted to the feedback control device 10 via cable. The data processing module in the feedback control device 10 analyzes the received signals in real time and outputs the analysis results to the execution module. The execution module is connected to the drive mechanism of the flow divider assembly 3 via cable. The drive mechanism adjusts the angle of the adjustable flow divider 4 according to the input signal, thereby achieving closed-loop control of the airflow pressure distribution. This closed-loop control mechanism ensures that the pressure distribution inside the duct is always in an optimal state.

[0038] Furthermore, the micro vortex generators 12 in the auxiliary flow optimization component 11 disturb the airflow, further optimizing its flow characteristics. There are 6 to 12 micro vortex generators 12, each bolted to the inner wall of the duct, with its central axis forming an angle of 30° to 45° with the duct axis. The surfaces of the micro vortex generators 12 are polished to reduce turbulence intensity as the airflow passes through. Their vortex direction forms a spiral disturbance with the mainstream direction of the duct, creating a weak spiral flow within the duct, thereby reducing boundary layer separation and improving overall airflow uniformity. This design not only optimizes the airflow characteristics but also significantly reduces system energy consumption.

[0039] Through the synergistic effect of the above steps, this invention achieves uniform pressure distribution within the duct, avoiding blockages caused by uneven pressure, and simultaneously optimizes airflow characteristics. In practical applications, this system significantly improves dust removal efficiency, reduces energy consumption during equipment operation, and extends the service life of the duct system. For example, in the actual operation of the aforementioned cement plant, after adopting this system, dust removal efficiency increased by approximately 15%, equipment operating energy consumption decreased by approximately 10%, and no further localized blockages occurred, verifying the practicality and promotional value of this invention.

[0040] All content not described in detail in this specification is prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are not shown in the figures because they are prior art, and will not be described further here.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pressure distribution uniform dust collection duct control system for a preheater inclined trough, characterized in that, include: The rectifier cavity (1), the flow distribution adjustment assembly (3), the pressure balance module (5), the dynamic monitoring unit (7), and the feedback control device (10) are included. The rectifier cavity (1) is located at the inlet end of the air duct, and a guide plate group (2) is provided inside it. The guide plate group (2) is connected to the inner wall of the rectifier cavity (1) through a fixed bracket, and the arrangement direction of the guide plate group (2) is at an angle of 30° to 60° with the axis of the air duct. The diversion adjustment component (3) is installed at the rear end of the rectifier cavity (1). It consists of multiple adjustable diversion plates (4). Each adjustable diversion plate (4) is hinged to the inner wall of the duct via a rotating shaft and its angle is adjusted by an external drive mechanism. The pressure balance module (5) is located behind the diversion adjustment component (3). It includes multiple pressure compensation chambers and a flexible diaphragm (6). The pressure compensation chamber is fixedly connected to the inner wall of the duct through a flange. The flexible diaphragm (6) is embedded in the pressure compensation chamber and contacts the airflow in the duct. The dynamic monitoring unit (7) is located at the outlet end of the air duct and includes a pressure sensor array (8) and a temperature sensor (9); The feedback control device (10) is electrically connected to the dynamic monitoring unit (7) and is used to receive data collected by the sensor and output control signals to the drive mechanism of the shunt adjustment component (3).

2. The pressure distribution uniform dust collection duct control system for the inclined trough of the preheater according to claim 1, characterized in that: It also includes an auxiliary flow optimization component (11), which is located between the rectifier cavity (1) and the flow splitting adjustment component (3). It consists of multiple micro vortex generators (12), which are fixed to the inner wall of the duct by bolts, and the angle between their central axis and the duct axis is 30° to 45°.

3. The pressure distribution uniform dust collection duct control system for the inclined trough of the preheater according to claim 2, characterized in that: The guide plate assembly (2) includes an upper guide plate, a middle guide plate and a lower guide plate. The upper guide plate, the middle guide plate and the lower guide plate are connected to the inner wall of the rectifier cavity (1) through fixed brackets of different heights, and the spacing between each layer of guide plates gradually decreases along the duct axis.

4. The pressure distribution uniform dust collection duct control system for the inclined trough of the preheater according to claim 3, characterized in that: The pressure compensation chamber includes a left compensation unit and a right compensation unit. The left compensation unit and the right compensation unit are respectively connected to the inner wall of the air duct through independent flexible diaphragms (6). The thickness of the flexible diaphragm (6) is 0.5mm to 1mm, and the material is high-temperature resistant silicone.

5. The pressure distribution uniform dust collection duct control system for the inclined trough of the preheater according to claim 4, characterized in that: The number of adjustable splitter plates (4) in the splitter adjustment assembly (3) is even, and the initial angle difference between adjacent splitter plates is 15° to 30°. The surface of the adjustable splitter plate (4) is coated with a low friction coefficient coating.

6. The pressure distribution uniform dust collection duct control system for the inclined trough of the preheater according to claim 5, characterized in that: The pressure sensor array (8) in the dynamic monitoring unit (7) includes multiple distributed pressure sensors. The distributed pressure sensors are evenly arranged along the cross-section of the duct, and each distributed pressure sensor has a measurement range of 0 kPa to 20 kPa and an accuracy of ±0.1 kPa. The temperature sensor (9) is a thermocouple sensor with a response time of 1 ms to 5 ms.

7. The pressure distribution uniform dust collection duct control system for the inclined trough of the preheater according to claim 6, characterized in that: The feedback control device (10) includes a data processing module and an execution module. The data processing module receives the signal transmitted by the dynamic monitoring unit (7) and performs real-time analysis. The analysis result is output to the drive mechanism of the diversion adjustment component (3) through the execution module. The drive mechanism adjusts the angle of the adjustable diversion plate (4) from 0° to 45° according to the input signal.

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