Energy-saving control device for pneumatic ash conveying system of power plant
By adopting intermittent airflow control and roller braking devices in the pneumatic ash conveying system, the problems of insufficient heat energy utilization and equipment wear have been solved, and the stability and economy of the system have been improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 中煤哈密发电有限公司
- Filing Date
- 2025-03-13
- Publication Date
- 2026-07-07
AI Technical Summary
Existing pneumatic ash conveying systems cannot effectively utilize the heat energy generated by air compressors, resulting in resource waste. Furthermore, the pipeline equipment suffers severe wear and tear, leading to high maintenance costs and short service life.
The system employs an intermittent airflow control gas delivery pipe, combined with rollers and roller braking devices, and is equipped with a connecting chamber and ash discharge pipe to reduce friction between ash particles and the pipe wall, thereby reducing equipment wear. Furthermore, the modular structure enhances system stability and ease of maintenance.
It effectively reduces pipeline wear and leakage risks, lowers maintenance costs, improves system stability and operational reliability, and reduces dust escape and dust removal equipment load.
Smart Images
Figure CN224467010U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of waste heat recovery technology of pneumatic ash conveying system, specifically an energy-saving control device for a power plant pneumatic ash conveying system. Background Technology
[0002] Coal combustion in thermal power plants produces a large amount of coal ash. These dust particles are captured by electrostatic precipitators and fall into the ash hopper and are temporarily stored in the silo pump, awaiting the compressed air used for ash conveying to blow them away and carry them into the ash silo. Typically, the pneumatic ash conveying system in coal-fired power plants uses an air compressor as the main power source for conveying ash. The air compressor generates a certain pressure to provide the power for the entire ash conveying system. However, the existing pneumatic ash conveying system cannot make reasonable use of the heat energy generated by the air compressor, resulting in resource waste and other problems.
[0003] For example, application CN220931142U discloses an automated energy-saving device for a pneumatic ash conveying system, including an air compressor body. An air compressor assembly is fixedly installed on the upper left side of the air compressor body, and rollers are connected to the lower bearing of the air compressor body. An ash hopper vaporization fan is installed at the rear end of the air compressor body, and a duct is connected to the right side of the ash hopper vaporization fan. A liquid storage tank is fixedly connected to the upper end of the air compressor body, and a partition is installed in the middle of the liquid storage tank. This automated energy-saving device for the pneumatic ash conveying system, by setting up multiple heat exchange structures, can utilize and recover the high temperature generated by the lubricating oil during the operation of the air compressor body, and simultaneously recover the heat carried by the exhaust gas of the compressed air. Through a circulating water structure, the heat is transferred to the interior of the second insulation pipe, facilitating the heating of the airflow when the ash hopper vaporization fan exits. This rationally utilizes the heat energy generated by the air compressor itself, reduces resource waste, and decreases electricity consumption.
[0004] However, during the implementation of the application, it was found that the structure in the application could not control the wear and tear of pipeline equipment, resulting in high maintenance costs and short service life. Utility Model Content
[0005] The purpose of this application is to provide an energy-saving control device for a power plant pneumatic ash conveying system in order to solve the problems mentioned above.
[0006] The technical solution adopted in this application is as follows: An energy-saving control device for a pneumatic ash conveying system in a power plant includes a device housing. A motor compartment is provided on the upper surface of the device housing near the rear edge. A bottom fixing ring is fixedly installed on the upper surface of the device housing at the front end of the motor compartment. An air conveying pipe is provided through the inside of the bottom fixing ring. A circular baffle is rotatably provided on the inner circumferential surface of the bottom fixing ring. A rotating rod is welded to the rear end of the circular baffle through the bottom fixing ring to the outer surface. A motor is fixedly connected to the rear end of the rotating rod.
[0007] By adopting the above technical solution in the pneumatic ash conveying system of the power plant, intermittent airflow in the control gas delivery pipe is implemented to avoid frequent friction between ash particles and the pipe wall caused by continuous high-speed airflow, which would exacerbate wear and even lead to ash leakage risks. Intermittent conveying effectively reduces local wear by decreasing the total amount of ash particles flowing per unit time. Furthermore, the intermittent air delivery avoids long-term high-pressure impact on the pipeline, reducing the probability of weld cracking. This is particularly suitable for conveying high-hardness ash and slag. When ash volume fluctuates significantly, it can prevent pipeline blockage or "ash-to-air ratio" imbalance due to overload. Intermittent conveying also reduces ineffective airflow emissions, lowering the load on end-of-line dust collection equipment and thus reducing the risk of dust escape. In addition, the reduced equipment wear directly lowers the frequency of spare parts replacement and maintenance costs.
[0008] As a further description of the above technical solution, connecting rods are welded to the left and right side surfaces of the device housing near the lower edge, and handles are fixedly connected to the ends of the connecting rods.
[0009] By adopting the above technical solution, handles are installed on the external structure of the power plant's pneumatic ash conveying system. This facilitates gripping, moving, or adjusting components during equipment installation and maintenance, reducing the risk of slippage. Simultaneously, the handles enhance the strength of the local structure, reduce deformation caused by external impacts, improve the efficiency of daily inspections and emergency response, and ensure the safe and stable operation of the system.
[0010] As a further description of the above technical solution, a connecting chamber is fixedly installed at the center line position of the outer circumferential surface of the gas transmission pipe, and a fixing block is welded to the lower surface of the connecting chamber.
[0011] By adopting the above technical solutions, installing a gas pipeline connection compartment in the power plant's pneumatic ash conveying system can significantly improve the system's stability and ease of maintenance. As a buffer and transition unit between pipelines, the connection compartment can balance pressure fluctuations during ash conveying, preventing pipeline vibration or ash particle deposition caused by sudden airflow changes, thereby reducing the risk of pipe blockage. Its internal expansion design can temporarily store part of the ash-gas mixture, improving conveying efficiency. Furthermore, the modular structure of the connection compartment allows for rapid isolation of faulty pipeline sections during maintenance, shortening downtime for maintenance and reducing long-term operation and maintenance costs.
[0012] As a further description of the above technical solution, a support column is fixedly connected to the corner of the lower surface of the device housing, and a chassis is fixedly installed at the lower end of the support column.
[0013] By adopting the above technical solution, a chassis structure is set at the lower end of the device, the purpose of which is to improve the stability of the overall structure.
[0014] As a further description of the above technical solution, an ash discharge pipe is installed through the center of the lower surface of the device housing.
[0015] By adopting the above technical solution, an ash pipe is installed at the lower end of the pneumatic ash conveying system in the power plant. Gravity allows for the natural flow of ash and slag, reducing the risk of ash accumulation and blockage within the pipes. The low-level design facilitates centralized collection and rapid discharge, and makes it easy to clean residues during maintenance, ensuring continuous and efficient system operation.
[0016] As a further description of the above technical solution, the chassis is rotatably mounted with rollers inside, a support column is welded to the front end of the upper surface of the chassis, a moving rod is installed inside the support column extending into the chassis, a pedal is provided on the upper surface of the support column, and a friction block is connected to the lower end of the moving rod relative to the surface of the rollers.
[0017] By adopting the above technical solution and installing rollers and roller braking devices in the support structure of the power plant's pneumatic ash conveying system, the stability and operational safety of the pipeline can be significantly improved. The roller braking device can lock its position when the system is shut down or when the pipeline needs to be secured, preventing accidental slippage caused by airflow pulsations or external impacts. The braking function maintains precise pipeline alignment, reducing the risk of leakage. The combination of these two features ensures controllability in emergency situations and enhances the overall reliability of the system.
[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of this application are:
[0019] 1. In this application, within the pneumatic ash conveying system of a power plant, intermittent airflow is controlled through the control of the gas delivery pipe to avoid frequent friction between ash particles and the pipe wall caused by continuous high-speed airflow, which could exacerbate wear and even lead to ash leakage risks. Intermittent conveying effectively reduces localized wear by decreasing the total amount of ash particles flowing per unit time. Furthermore, the intermittent air delivery avoids the pipeline from being subjected to long-term high-pressure impacts, reducing the probability of weld cracking. This is particularly suitable for conveying high-hardness ash and slag. When ash volume fluctuates significantly, it can prevent pipeline blockage or "ash-to-air ratio" imbalance due to overload. Intermittent conveying also reduces ineffective airflow emissions, lowering the load on end-of-pipe dust collection equipment and thus reducing the risk of dust escape. In addition, the reduced equipment wear directly lowers the frequency of spare parts replacement and maintenance costs.
[0020] 2. In this application, the installation of rollers and roller braking devices in the support structure of the power plant pneumatic ash conveying system can significantly improve pipeline stability and operational safety. The roller braking device can lock its position when the system is shut down or when the pipeline needs to be fixed, preventing accidental slippage caused by airflow pulsation or external impact. The braking function can maintain precise alignment of the pipeline and reduce the risk of leakage. The combination of these two features ensures controllability in emergency situations and improves the overall reliability of the system.
[0021] 3. In this application, the installation of a gas pipeline connection compartment in the power plant pneumatic ash conveying system can significantly improve the system's stability and ease of maintenance. As a buffer and transition unit between pipelines, the connection compartment can balance pressure fluctuations during ash conveying, preventing pipeline vibration or ash particle deposition caused by sudden airflow changes, thereby reducing the risk of pipe blockage. Its internal expansion design can temporarily store a portion of the ash-gas mixture, improving conveying efficiency. Furthermore, the modular structure of the connection compartment allows for rapid isolation of faulty pipeline sections during maintenance, shortening downtime for maintenance and reducing long-term operation and maintenance costs. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the external structure of this application;
[0023] Figure 2 This is a bottom view of the external structure in this application;
[0024] Figure 3 This is a schematic diagram of the internal structure of the bottom fixing ring in this application;
[0025] Figure 4 This is a schematic diagram of the internal structure of the chassis in this application.
[0026] The markings in the diagram are: 1. Device casing; 2. Support column; 3. Chassis; 4. Motor compartment; 5. Bottom fixing ring; 6. Fixing block; 7. Connecting compartment; 8. Gas supply pipe; 9. Handle; 10. Connecting rod; 11. Ash discharge pipe; 12. Motor; 13. Rotating rod; 14. Circular baffle; 15. Support column; 16. Pedal; 17. Friction block; 18. Roller; 19. Moving rod. Detailed Implementation
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0029] Example:
[0030] Reference Figure 1-3 An energy-saving control device for a power plant pneumatic ash conveying system includes a housing 1. A motor compartment 4 is located on the upper surface of the housing 1 near the rear edge. A bottom fixing ring 5 is fixedly installed on the upper surface of the housing 1 at the front end of the motor compartment 4. An air conveying pipe 8 is installed through the inside of the bottom fixing ring 5. A circular baffle 14 is rotatably installed on the inner circumferential surface of the bottom fixing ring 5. A rotating rod 13 is welded to the rear end of the circular baffle 14 through the bottom fixing ring 5 to the outer surface. A motor 12 is fixedly connected to the rear end of the rotating rod 13. In the power plant pneumatic ash conveying system, by setting the intermittent airflow of the air conveying pipe, i.e., periodically starting and stopping or adjusting the airflow, the system performance can be significantly optimized and multiple economic benefits and technical advantages can be brought about. Continuous high-speed airflow will cause ash particles to rub frequently against the pipe wall, aggravating wear and even causing the risk of ash leakage. Intermittent conveying effectively reduces localized wear by decreasing the total amount of ash particles flowing per unit time. Furthermore, the intermittent gas delivery avoids prolonged high-pressure impact on the pipeline, reducing the probability of weld cracking. It is particularly suitable for conveying high-hardness ash and slag. When ash volume fluctuates significantly, it prevents pipeline blockage or imbalance in the ash-to-gas ratio due to overload. Intermittent conveying also reduces ineffective airflow emissions, lowering the load on end-of-line dust collection equipment and thus reducing the risk of dust escape. In addition, reduced equipment wear directly lowers the frequency of spare parts replacement and maintenance costs.
[0031] Reference Figure 1-2Connecting rods 10 are welded to the lower edges of the left and right sides of the outer casing 1. Handles 9 are fixedly connected to the ends of the connecting rods 10. The handles on the external structure of the system facilitate gripping, moving, or adjusting components during equipment installation and maintenance, reducing the risk of slippage. At the same time, the handles can enhance the local structural strength, reduce deformation caused by external impacts, improve the efficiency of daily inspections and emergency handling, and ensure the safe and stable operation of the system.
[0032] Reference Figure 1 A connecting chamber 7 is fixedly installed at the center line of the outer circumference of the gas transmission pipe 8. A fixing block 6 is welded to the lower surface of the connecting chamber 7. The installation of a connecting chamber in the ash conveying system significantly improves system stability and ease of maintenance. As a buffer and transition unit between pipelines, the connecting chamber balances pressure fluctuations during ash conveying, preventing pipeline vibration or ash particle deposition caused by sudden airflow changes, thereby reducing the risk of pipe blockage. Its internal expansion design can temporarily store part of the ash-gas mixture, improving conveying efficiency. Furthermore, the connecting chamber adopts a modular structure, allowing for rapid isolation of faulty pipeline sections during maintenance, shortening downtime for maintenance and reducing long-term operation and maintenance costs.
[0033] Reference Figure 1 A support column 2 is fixedly connected to the corner of the lower surface of the device housing 1. A chassis 3 is fixedly installed at the lower end of the support column 2. The chassis structure is set at the lower end of the device to improve the stability of the overall structure.
[0034] Referring to the figure, an ash discharge pipe 11 is installed through the center of the lower surface of the device housing 1. The ash discharge pipe is located at the lower end of the external structure, which allows the ash and slag to be naturally guided by gravity, reducing the risk of ash accumulation and blockage in the pipe. The low-position design facilitates centralized collection and rapid discharge, and makes it easy to clean residues during maintenance, ensuring continuous and efficient operation of the system.
[0035] Reference Figure 1 and Figure 4 The chassis 3 has rollers 18 rotatably mounted inside. A support column 15 is welded to the front end of the upper surface of the chassis 3. A moving rod 19 is installed inside the support column 15, extending through the chassis 3. A pedal 16 is provided on the upper surface of the support column 15. A friction block 17 is connected to the lower end of the moving rod 19 relative to the surface of the rollers 18. The inclusion of rollers and a roller braking device in the support structure significantly improves pipeline stability and operational safety. The roller braking device can lock its position when the system stops or when the pipeline needs to be fixed, preventing accidental slippage caused by airflow pulsation or external impact. The braking function maintains precise pipeline alignment, reducing the risk of leakage. The combination of these two features ensures controllability in emergency situations and improves the overall reliability of the system.
[0036] The implementation principle of an energy-saving control device embodiment for a power plant pneumatic ash conveying system is as follows: In this application, the intermittent airflow of the control air conveying pipe in the power plant pneumatic ash conveying system is used to avoid frequent friction between ash particles and the pipe wall caused by continuous high-speed airflow, which would exacerbate wear and even lead to the risk of ash leakage. Intermittent conveying effectively reduces local wear by reducing the total amount of ash particles flowing per unit time. Furthermore, the intermittent air conveying can prevent the pipeline from being subjected to high-pressure impact for a long time, reducing the probability of weld cracking. It is especially suitable for conveying high-hardness ash and slag. When the ash volume fluctuates greatly, it can avoid pipeline blockage or "ash-to-air ratio" imbalance due to overload. Intermittent conveying can reduce the emission of ineffective airflow, reduce the load on the terminal dust removal equipment, and thus reduce the risk of dust escape. In addition, the reduction in equipment wear directly reduces the frequency of spare parts replacement and maintenance costs.
[0037] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., 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. An energy-saving control device for a pneumatic ash conveying system in a power plant, comprising a device housing (1), characterized in that: A motor compartment (4) is provided on the upper surface of the device housing (1) near the rear edge. A bottom fixing ring (5) is fixedly installed on the upper surface of the device housing (1) at the front end of the motor compartment (4). An air supply pipe (8) is provided through the inside of the bottom fixing ring (5). A circular baffle (14) is rotatably provided on the inner circumferential surface of the bottom fixing ring (5). A rotating rod (13) is welded to the rear end of the circular baffle (14) through the bottom fixing ring (5) to the outer surface. A motor (12) is fixedly connected to the rear end of the rotating rod (13).
2. The energy-saving control device for a power plant pneumatic ash conveying system as described in claim 1, characterized in that: Connecting rods (10) are welded to the left and right sides of the outer casing (1) near the lower edge, and handles (9) are fixedly connected to the ends of the connecting rods (10).
3. The energy-saving control device for a power plant pneumatic ash conveying system as described in claim 1, characterized in that: A connecting chamber (7) is fixedly installed at the center line of the outer circumference surface of the gas pipeline (8), and a fixing block (6) is welded to the lower surface of the connecting chamber (7).
4. The energy-saving control device for a power plant pneumatic ash conveying system as described in claim 1, characterized in that: A support column (2) is fixedly connected to the corner of the lower surface of the device housing (1), and a chassis (3) is fixedly installed at the lower end of the support column (2).
5. The energy-saving control device for a power plant pneumatic ash conveying system as described in claim 1, characterized in that: A dust discharge pipe (11) is installed through the center of the lower surface of the device housing (1).
6. The energy-saving control device for a power plant pneumatic ash conveying system as described in claim 4, characterized in that: The chassis (3) is rotatably mounted with rollers (18), and a support column (15) is welded to the front end of the upper surface of the chassis (3). A moving rod (19) is installed inside the support column (15) and extends into the chassis (3). A pedal (16) is provided on the upper surface of the support column (15). A friction block (17) is connected to the lower end of the moving rod (19) relative to the surface of the roller (18).