A leveling device for a coal-fired power plant pulverizing system
By monitoring wind speed and pulverized coal concentration using wind speed and electrostatic induction sensors, and automatically adjusting electromagnetic valves, the problem of uneven pulverized coal delivery in traditional coal-fired power plant pulverizing systems is solved, thereby improving combustion efficiency and operational stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG YUDEAN BOHE COAL POWER CO LTD
- Filing Date
- 2025-07-18
- Publication Date
- 2026-07-03
AI Technical Summary
In traditional coal-fired power plant pulverizing systems, uneven coal powder delivery leads to combustion efficiency and boiler operation safety issues. Manual adjustment is difficult to achieve precise control, especially under dynamic operating conditions where adjustment lags behind.
The system uses wind speed and electrostatic induction sensors to monitor wind speed and coal powder concentration in real time. It automatically adjusts wind speed and coal powder flow through electromagnetic valves to ensure uniform delivery. The design is reasonable and easy to install and maintain.
It improves combustion efficiency and operational stability, reduces equipment footprint, lowers energy consumption and pollutant emissions, and achieves uniform coal powder transportation and combustion.
Smart Images
Figure CN224454649U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of leveling devices, specifically a leveling device for a coal-fired power plant pulverizing system. Background Technology
[0002] In the pulverizing system of a coal-fired power plant, the uniform delivery of pulverized coal is crucial to the combustion efficiency and stability of the boiler. The main function of the pulverizing system is to grind coal into qualified pulverized coal and deliver it evenly to the boiler burners through the conveying pipeline. However, due to the different lengths, number of bends and resistance of each pulverizing pipe, it is easy to cause uneven primary air velocity and pulverized coal concentration in each burner, thereby affecting the combustion efficiency and the safety of boiler operation.
[0003] Traditional pulverized coal conveying systems typically employ manual adjustment, using throttle valves or dampers to control airflow and pulverized coal concentration. This method is not only cumbersome to operate but also difficult to achieve precise control. Especially under complex operating conditions, manual adjustment cannot monitor changes in airflow and pulverized coal concentration in real time, making it difficult to adapt to dynamic conditions, resulting in adjustment lag and affecting combustion efficiency. Therefore, a leveling device that can effectively adjust airflow and pulverized coal concentration is needed. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a leveling device for a coal-fired power plant pulverizing system, which has the advantages of ensuring the uniformity of wind speed and concentration of pulverized coal during transportation, thereby achieving uniform combustion of pulverized coal in the boiler, and solving the problems mentioned in the background technology.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A leveling device for a coal-fired power plant pulverizing system includes a conveying pipeline and a fan. An air outlet pipe is fixed at the air outlet end of the fan. An air outlet plate is fixed inside the left side of the conveying pipeline. Several air outlet nozzles are connected to the right side of the air outlet plate. The right side of the air outlet pipe passes through the conveying pipeline and is connected to the left side of the air outlet plate.
[0007] A connecting component is provided on the right side of the conveying pipeline;
[0008] The connecting assembly includes a first solenoid valve connected to the outside of the right side of the conveying pipe. The inside of the first solenoid valve is connected to a first connecting pipe. A first flange is provided on the right side of the first connecting pipe. A rubber sealing ring is fixed on the right side of the first flange. A second flange is fixed to the right side of the first flange by bolts. The left side of the second flange abuts against the right side of the rubber sealing ring. A second connecting pipe is provided on the right side of the second flange. A wind speed sensor and an electrostatic induction sensor are provided on the top and bottom walls of the inner cavity of the second connecting pipe. A discharge assembly is provided inside the right side of the second connecting pipe.
[0009] Furthermore, the discharge assembly includes a conical guide hopper fixed inside the right side of the second connecting pipe, and a control component is provided on the right side of the conical guide hopper.
[0010] Furthermore, the control component includes a first discharge pipe connected to the right side of the conical guide hopper, a second solenoid valve connected to the outer side of the right side of the first discharge pipe, and a second discharge pipe connected to the interior of the second solenoid valve.
[0011] Furthermore, a fixing frame is fixed inside the right side of the second connecting pipe, and the first discharge pipe is fixed inside the fixing frame.
[0012] Furthermore, a feeding pipe is connected to the upper surface of the left side of the conveying pipe.
[0013] Furthermore, several of the aforementioned air outlets are evenly distributed on the right side of the air outlet panel.
[0014] Furthermore, the air outlet plate is shaped like a hollow cylinder.
[0015] Furthermore, an air inlet frame is fixed to the air inlet end of the fan, and a filter screen is fixed inside the air inlet frame.
[0016] Compared with the prior art, this utility model provides a leveling device for a coal-fired power plant pulverizing system, which has the following beneficial effects:
[0017] The leveling device of this coal-fired power plant pulverizing system evenly distributes air through air outlets, ensuring uniformity of air velocity and pulverized coal concentration, thereby improving combustion efficiency and operational stability. Wind speed and electrostatic induction sensors monitor air velocity and pulverized coal concentration in real time, and automatic adjustment via a first solenoid valve ensures stable and uniform conveying. The device is rationally designed, compactly laid out, easy to install and maintain, and reduces equipment footprint. Precise control of air velocity and pulverized coal concentration improves combustion efficiency, reduces energy consumption, and minimizes pollutant emissions. Pulverized coal is guided to the first discharge pipe via a conical guide hopper, and the discharge of pulverized coal is controlled by a second solenoid valve, ensuring uniformity of pulverized coal during the discharge process and preventing pulverized coal accumulation or blockage. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of this utility model;
[0019] Figure 2 This is a schematic diagram of the connection structure between the air outlet plate and the air outlet nozzle of this utility model;
[0020] Figure 3 This is a schematic diagram of the connection component of this utility model.
[0021] In the diagram: 1. Conveying pipe, 2. Fan, 3. Air outlet pipe, 4. Air outlet plate, 5. Air outlet nozzle, 6. Connecting assembly, 601. First solenoid valve, 602. First connecting pipe, 603. First flange, 604. Rubber sealing ring, 605. Second flange, 606. Second connecting pipe, 607. Wind speed sensor, 608. Electrostatic induction sensor, 609. Conical guide hopper, 610. First discharge pipe, 611. Second solenoid valve, 612. Second discharge pipe. Detailed Implementation
[0022] 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.
[0023] Please see Figures 1 to 2 The leveling device of a coal-fired power plant pulverizing system in this embodiment includes a conveying pipe 1 and a blower 2. An air outlet pipe 3 is fixed at the air outlet end of the blower 2. An air outlet plate 4 is fixed inside the left side of the conveying pipe 1. Several air outlet nozzles 5 are connected to the right side of the air outlet plate 4. The right side of the air outlet pipe 3 passes through the conveying pipe 1 and is connected to the left side of the air outlet plate 4. A connecting component 6 is provided on the right side of the conveying pipe 1.
[0024] In this embodiment, several air outlets 5 are evenly distributed on the right side of the air outlet plate 4. The air outlet plate 4 is a hollow cylinder. An air inlet frame is fixed at the air inlet end of the fan 2, and a filter screen is fixed inside the air inlet frame.
[0025] It should be noted that in the pulverizing system of a coal-fired power plant, the uniform delivery of pulverized coal is crucial to the combustion efficiency and stability of the boiler. The main function of the pulverizing system is to grind coal into qualified pulverized coal and deliver it evenly to the boiler burner through pipelines. The filter screen can filter dust and impurities in the air.
[0026] Please see Figure 3In this embodiment, the connecting component 6 includes a first solenoid valve 601 connected to the outside of the right side of the conveying pipe 1. The inside of the first solenoid valve 601 is connected to a first connecting pipe 602. A first flange 603 is provided on the right side of the first connecting pipe 602. A rubber sealing ring 604 is fixed on the right side of the first flange 603. A second flange 605 is fixed to the right side of the first flange 603 by bolts. The left side of the second flange 605 abuts against the right side of the rubber sealing ring 604. A second connecting pipe 606 is provided on the right side of the second flange 605. A wind speed sensor 607 and an electrostatic induction sensor 608 are provided on the top and bottom walls of the inner cavity of the second connecting pipe 606. A discharge component is provided inside the right side of the second connecting pipe 606.
[0027] Specifically, the air generated by the blower 2 enters the air outlet plate 4 through the air outlet pipe 3 and is evenly distributed into the conveying pipe 1 through the air outlet nozzles 5. The air outlet nozzles 5 are evenly distributed on the right side of the air outlet plate 4 to ensure the uniformity of the air speed. The coal powder enters the conveying pipe 1 through the feeding pipe. Under the action of the evenly distributed air, the coal powder is evenly conveyed to the second connecting pipe 606. The wind speed sensor 607 and the electrostatic induction sensor 608 monitor the wind speed and coal powder concentration in real time. According to the monitoring data, the wind speed and coal powder flow rate are automatically adjusted through the first solenoid valve 601 to ensure the uniform conveying of coal powder. The electrostatic induction sensor 608 uses the static charge generated by the coal powder particles during the movement to measure the coal powder concentration and flow rate. When charged coal powder particles pass through the metal induction probe, an equal amount of induced charge will be generated on the probe surface. The magnitude of the induced current is proportional to the coal powder flow rate.
[0028] Specifically, the discharge assembly includes a conical guide hopper 609 fixed inside the right side of the second connecting pipe 606. A control component is provided on the right side of the conical guide hopper 609. The control component includes a first discharge pipe 610 connected to the right side of the conical guide hopper 609. A second solenoid valve 611 is connected to the outer side of the right side of the first discharge pipe 610. A second discharge pipe 612 is connected inside the second solenoid valve 611. The second discharge pipe 612 sends pulverized coal into the burner for combustion. A fixing frame is fixed inside the right side of the second connecting pipe 606. The first discharge pipe 610 is fixed inside the fixing frame.
[0029] Specifically, a feeding pipe is connected to the upper surface of the left side of the conveying pipe 1. The top of the feeding pipe is connected to the discharge pipe of the coal mill. If the detected wind speed is lower than the preset threshold of the wind speed sensor 607, the control system will send a signal to increase the opening of the first solenoid valve 601, thereby increasing the airflow. If the detected wind speed is higher than the preset threshold of the wind speed sensor 607, the control system will send a signal to decrease the opening of the first solenoid valve 601, thereby reducing the airflow. If the detected wind speed and coal powder concentration are within the preset threshold range, the first solenoid valve 601 maintains its current opening and maintains stable operation.
[0030] It should be noted that the pulverized coal enters the first discharge pipe 610 through the conical guide hopper 609, and the discharge of the pulverized coal is controlled by the second solenoid valve 611. Finally, it is transported to the next process through the second discharge pipe 612. The first flange 603 and the second flange 605 are fixed by bolts. The rubber sealing ring 604 ensures the sealing of the connection to prevent pulverized coal leakage. At the same time, it facilitates the disassembly of the second connecting pipe 606 so as to inspect the wind speed sensor 607 and the electrostatic induction sensor 608 inside the second connecting pipe 606.
[0031] It should be noted that, in addition, all electrical components appearing in this embodiment are electrically connected to the main controller and the power supply. The main controller can be a conventional known device such as a computer that plays a control role. Those skilled in the art can control the electrical components through simple programming. Moreover, the existing publicly available power connection technology is also common knowledge in the field. Therefore, the specific structural composition and working principle will not be described in detail in this embodiment.
[0032] The working principle of the above embodiments is as follows:
[0033] In operation, the air generated by the blower 2 enters the air outlet plate 4 through the air outlet pipe 3 and is evenly distributed into the conveying pipe 1 through the air outlet nozzles 5. The air outlet nozzles 5 are evenly distributed on the right side of the air outlet plate 4 to ensure uniform airflow. Coal powder enters the conveying pipe 1 through the feeding pipe. Under the action of the evenly distributed airflow, the coal powder is evenly conveyed to the second connecting pipe 606. The wind speed sensor 607 and the electrostatic induction sensor 608 monitor the wind speed and coal powder concentration in real time. Based on the monitoring data, the wind speed and coal powder flow rate are automatically adjusted by the first solenoid valve 601 to ensure uniformity. To ensure uniform conveying of pulverized coal, the pulverized coal enters the first discharge pipe 610 through the conical guide hopper 609, and the discharge of pulverized coal is controlled by the second solenoid valve 611. Finally, it is conveyed to the next process through the second discharge pipe 612. The first flange 603 and the second flange 605 are fixed by bolts. The rubber sealing ring 604 ensures the sealing of the connection to prevent pulverized coal leakage, and at the same time facilitates the disassembly of the second connecting pipe 606 to inspect the wind speed sensor 607 and the electrostatic induction sensor 608 inside the second connecting pipe 606.
[0034] It should be noted that the orientations or positional relationships indicated herein are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the purpose of facilitating the description of this application and simplifying the description, and are not intended to 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 application.
[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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. Without further limitations, 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 said element.
[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A coal pulverizing system levelling device for a coal fired power plant comprising a transfer duct (1) and a fan (2) characterised in that: The air outlet end of the fan (2) is fixed with an air outlet pipe (3), and an air outlet plate (4) is fixed inside the left side of the conveying pipe (1). Several air outlet nozzles (5) are connected to the right side of the air outlet plate (4). The right side of the air outlet pipe (3) passes through the conveying pipe (1) and is connected to the left side of the air outlet plate (4). A connecting component (6) is provided on the right side of the conveying pipe (1); The connecting assembly (6) includes a first solenoid valve (601) connected to the outside of the right side of the conveying pipe (1). The inside of the first solenoid valve (601) is connected to a first connecting pipe (602). A first flange (603) is provided on the right side of the first connecting pipe (602). A rubber sealing ring (604) is fixed on the right side of the first flange (603). A second flange (605) is fixed to the right side of the first flange (603) by bolts. The left side of the second flange (605) abuts against the right side of the rubber sealing ring (604). A second connecting pipe (606) is provided on the right side of the second flange (605). A wind speed sensor (607) and an electrostatic induction sensor (608) are provided on the top and bottom walls of the inner cavity of the second connecting pipe (606). A discharge assembly is provided inside the right side of the second connecting pipe (606).
2. The coal pulverizing system leveler for a coal-fired power plant of claim 1, wherein: The discharge assembly includes a conical guide hopper (609) fixed inside the right side of the second connecting pipe (606), and a control element is provided on the right side of the conical guide hopper (609).
3. The coal pulverizing system leveler for a coal-fired power plant of claim 2, wherein: The control unit includes a first discharge pipe (610) connected to the right side of the conical guide hopper (609), a second solenoid valve (611) connected to the outer side of the right side of the first discharge pipe (610), and a second discharge pipe (612) connected to the inside of the second solenoid valve (611).
4. The coal pulverizing system leveler of claim 3, wherein: A fixing frame is fixed inside the right side of the second connecting pipe (606), and the first discharge pipe (610) is fixed inside the fixing frame.
5. The coal pulverizing system leveler for a coal-fired power plant of claim 1, wherein: The upper surface on the left side of the conveying pipe (1) is connected to a feeding pipe.
6. The coal pulverizing system leveler for a coal-fired power plant of claim 1, wherein: Several of the aforementioned air outlets (5) are evenly distributed on the right side of the air outlet plate (4).
7. The coal pulverizing system leveler for a coal-fired power plant of claim 1, wherein: The air outlet plate (4) is a hollow cylinder.
8. The coal pulverizing system leveler for a coal-fired power plant of claim 1, wherein: The air inlet end of the fan (2) is fixed with an air inlet frame, and a filter screen is fixed inside the air inlet frame.