Ash bin high level material cleaning device

Abstract

The utility model discloses a kind of ash bucket high-level material cleaning devices, it is related to the ash removal system technical field of thermal power plant, including ash bucket main body, the lower portion of ash bucket main body is equipped with bin pump by connecting pipe, the bottom of bin pump is equipped with ash conveying pipeline, and the outlet end of ash conveying pipeline is connected to ash storage, one side of ash bucket main body is equipped with ash conveying branch pipe, one end of ash conveying branch pipe is connected with the inner cavity of ash bucket main body, and the other end of ash conveying branch pipe is connected to ash conveying tank car, negative pressure fan is installed at the middle position of ash conveying branch pipe, the upper end of the inner cavity of ash bucket main body is installed with ash level height monitoring mechanism, the back of ash bucket main body is installed with vibration mechanism, solve the existing technology in the rear due to multiple reasons cause electric precipitation ash bucket material level is higher than ash bucket exhaust valve, bin pump cannot form negative pressure in, cause bin pump ash is not smooth, by bin pump ash conveying reduce the difficulty of electric precipitation ash bucket ash level greatly.

Description

Technical Field

[0001] This utility model relates to the technical field of ash removal systems in thermal power plants, specifically to a high-level ash hopper cleaning device. Background Technology

[0002] In the production and operation of thermal power plants, boiler fuel is often a blend of railway coal and truck coal. However, the diverse sources of railway coal result in complex coal composition and significant fluctuations in coal quality. Simultaneously, the operation of the plant's AGC (Automatic Generator Control) system leads to frequent and substantial changes in unit load. Furthermore, problems such as ash conveying system malfunctions and excessively high ash levels in the ash silos also occur frequently. The combination of these factors can easily cause the ash level in the electrostatic precipitator hopper to rise. If this problem is not addressed promptly, the ash level in the hopper will continue to rise to the level of the electrostatic precipitator electrodes, potentially leading to short circuits in the electrodes, high-voltage field tripping, and in severe cases, even ash hopper collapse, posing a significant threat to the safe and stable operation of the unit.

[0003] In existing technologies, to quickly reduce the ash level in each ash hopper and ensure the safety of electrostatic precipitators, a pump body for dust extraction is generally installed directly at the bottom. However, during use, problems such as a sudden increase in dust volume and excessively long cleaning intervals can easily lead to the ash hopper level being higher than the ash hopper exhaust valve, resulting in the inability to form negative pressure in the pump body and causing poor ash discharge. Moreover, dust is easily generated on-site during ash discharge, requiring a lot of extra effort to pay attention to hygiene and take corresponding dust suppression measures, which increases the complexity and cost of operation. Therefore, it does not meet the current needs. In response, we propose an ash hopper high-level material cleaning device. Utility Model Content

[0004] The purpose of this utility model is to provide a high-level material cleaning device for the ash hopper, so as to solve the problem mentioned in the background art that, due to various reasons, the material level in the electrostatic precipitator ash hopper is higher than the ash hopper exhaust valve, and the negative pressure cannot be formed in the silo pump, resulting in poor ash discharge from the silo pump and making it extremely difficult to reduce the ash level in the electrostatic precipitator ash hopper by conveying ash through the silo pump.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-level material cleaning device for an ash hopper, comprising an ash hopper body, a silo pump connected to the bottom of the ash hopper body via a connecting pipe, an ash conveying pipe at the bottom of the silo pump, and an outlet end of the ash conveying pipe connected to an ash storage silo, an ash conveying branch pipe on one side of the ash hopper body, one end of the ash conveying branch pipe communicating with the inner cavity of the ash hopper body, and the other end of the ash conveying branch pipe connected to an ash transport truck, a negative pressure fan installed at the middle position of the ash conveying branch pipe, an ash level monitoring mechanism installed at the upper end of the inner cavity of the ash hopper body, and a vibration mechanism installed on the back of the ash hopper body.

[0006] Preferably, the lower end of the ash hopper body is equipped with a hopper pump lower ash insert plate for sealing the ash outlet, and the hopper pump lower ash insert plate is inserted into the ash hopper body.

[0007] Preferably, an ash discharge valve is installed at one end of the ash conveying branch pipe near the ash hopper body.

[0008] Preferably, the ash level height monitoring mechanism includes a fixing plate, and the two ends of the fixing plate are fixed to the ash hopper body by screws. An ultrasonic sensor is installed at the middle position of the bottom of the fixing plate, and the detection end of the ultrasonic sensor faces the inside of the ash hopper body. The output end of the ultrasonic sensor is connected to a microcontroller, and the output end of the microcontroller is connected to an alarm.

[0009] Preferably, the vibration mechanism includes a fixed base, which is fixed to the ash hopper body by bolts. A dual-shaft drive motor is fixedly installed on the back of the fixed base, and an eccentric wheel is installed on the output shaft of the drive motor.

[0010] Preferably, the vibration frequency of the drive motor can be adjusted to 50-100Hz.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model, by setting up an ash conveying branch pipe, allows for rapid connection to the sealed interface of the transport vehicle in emergency situations such as high material levels in the electrostatic precipitator ash hopper and blockages in the conventional ash conveying system or malfunctioning silo pumps. By opening the ash discharge gate to form an ash discharge channel, and simultaneously activating the negative pressure fan, the accumulated ash is efficiently transported to the transport vehicle along the ash conveying pipe. This design not only quickly lowers the ash hopper level to a safe range, significantly shortening the high-level handling time, but also avoids the dust problems common in traditional ash discharge methods through its sealed conveying structure, reducing on-site dust pollution, lowering subsequent cleaning and maintenance costs, and eliminating the need for additional dust suppression equipment, thus balancing processing efficiency and environmental protection requirements.

[0013] 2. This utility model utilizes a high-temperature resistant ultrasonic sensor to monitor the changes in dust height in the ash hopper in real time and with high accuracy. When the dust level reaches the preset warning value, the sensor can automatically issue an audible and visual alarm through a linkage alarm signal system, reminding staff to keep abreast of the dust level dynamics and make advance preparations for dust removal. This effectively avoids equipment failures such as short circuits in the electrostatic precipitator plates and electric field tripping caused by excessively high dust levels, significantly improving the safety and stability of the electrostatic precipitator system and reducing the risk of unplanned downtime.

[0014] 3. This utility model utilizes the drive motor of the vibration assembly to generate high-frequency vibration. The vibration energy is transmitted to the entire cavity through the outer wall of the ash hopper, which can effectively break up the caking and adhesion layers formed on the inner wall of the ash hopper. It is especially suitable for processing fly ash with high moisture content or high viscosity. This design ensures that the accumulated ash can fall continuously and smoothly to the ash discharge port, avoiding the problem of ash discharge interruption caused by local blockage. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present utility model;

[0016] Figure 2 This is a front view of the present invention;

[0017] Figure 3 This is another perspective view of the present invention;

[0018] Figure 4 This is a top view of the present invention.

[0019] In the diagram: 1. Ash hopper body; 2. Silo pump; 3. Ash conveying pipe; 4. Ash conveying branch plate of silo pump; 5. Ash conveying branch pipe; 6. Negative pressure fan; 7. Ash discharge valve; 8. Fixing plate; 9. Ultrasonic sensor; 10. Fixing base; 11. Drive motor; 12. Eccentric wheel. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Please see Figure 1-4 An embodiment of this utility model provides a high-level material cleaning device for an ash hopper, comprising an ash hopper body 1, a hopper pump 2 connected to the bottom of the ash hopper body 1 via a connecting pipe, an ash conveying pipe 3 at the bottom of the hopper pump 2, and an outlet end of the ash conveying pipe 3 connected to an ash storage silo, an ash conveying branch pipe 5 on one side of the ash hopper body 1, one end of the ash conveying branch pipe 5 being connected to the inner cavity of the ash hopper body 1, and the other end of the ash conveying branch pipe 5 being connected to an ash transport tanker, a negative pressure fan 6 installed at the middle position of the ash conveying branch pipe 5, an ash level height monitoring mechanism installed at the upper end of the inner cavity of the ash hopper body 1, and a vibration mechanism installed on the back of the ash hopper body 1;

[0022] When the ash level in the ash hopper body 1 is too high, the ash level monitoring mechanism triggers an early warning, which can close the ash lower baffle 4 of the hopper pump to stop ash conveying to the hopper pump 2, and start the negative pressure fan 6 to directly pump the high-level ash in the ash hopper to the ash transport truck through the ash conveying branch pipe 5. At the same time, the vibration mechanism works to prevent ash accumulation and blockage, realizing a dual-channel design of conventional ash conveying and emergency rapid ash cleaning. Even when the hopper pump system fails, it can still efficiently discharge ash and avoid the continuous rise of ash level causing safety accidents.

[0023] Please see Figure 3 The lower end of the ash hopper body 1 is equipped with a hopper pump down-slip plate 4 for sealing the ash outlet. The hopper pump down-slip plate 4 is plugged into the ash hopper body 1. Under normal operating conditions, the hopper pump down-slip plate 4 is open, and the ash in the ash hopper enters the hopper pump 2 through the connecting pipe and is then transported to the ash storage silo via the ash conveying pipe 3. When it is necessary to activate the ash conveying branch pipe 5 for emergency ash discharge, the hopper pump down-slip plate 4 is closed to block the ash conveying path to the hopper pump, allowing the ash to be concentrated and discharged through the ash conveying branch pipe 5. The opening and closing of the slip plate enables rapid switching of the ash conveying path, ensuring the concentration of ash during emergency ash discharge, improving the working efficiency of the ash conveying branch pipe, and avoiding energy waste caused by ash diversion.

[0024] Please see Figure 1 An ash discharge valve 7 is installed at one end of the ash conveying branch pipe 5 near the ash hopper body 1. During normal operation, the ash discharge valve 7 is closed to prevent ash leakage from the ash hopper. When the ash level monitoring mechanism detects a high ash level and emergency ash discharge is required, the ash discharge valve 7 is opened, allowing the ash in the ash hopper to enter the ash transport truck through the ash conveying branch pipe 5 under the action of the negative pressure fan 6. After ash discharge is completed, the ash discharge valve 7 is closed to restore normal operation. This achieves precise control of the ash conveying branch pipe, avoiding ash leakage and energy loss in non-emergency situations, while improving the safety and reliability of the unit's operation.

[0025] Please see Figure 1 and Figure 3 The ash level monitoring mechanism includes a fixed plate 8, with both ends of the fixed plate 8 fixed to the ash hopper body 1 by screws. An ultrasonic sensor 9 is installed at the middle position of the bottom of the fixed plate 8, with the detection end of the ultrasonic sensor 9 facing the inside of the ash hopper body 1. The output end of the ultrasonic sensor 9 is connected to a microcontroller, and the output end of the microcontroller is connected to an alarm. The ultrasonic sensor 9 emits ultrasonic waves into the ash hopper in real time and receives reflected waves. The ash level is calculated by calculating the sound wave propagation time and the data is transmitted to the microcontroller. When the ash level reaches a preset threshold, the microcontroller triggers the alarm to issue an audible and visual alarm, reminding staff to take timely ash removal measures. This achieves real-time monitoring and automatic early warning of ash level, avoiding the lag and errors of manual inspection, ensuring that staff can respond to high material level issues in a timely manner, and reducing the risk of equipment failure.

[0026] Please see Figure 3 and Figure 4The vibration mechanism includes a fixed base 10, which is bolted to the ash hopper body 1. A dual-shaft drive motor 11 is fixedly mounted on the back of the fixed base 10. An eccentric wheel 12 is mounted on the output shaft of the drive motor 11. The vibration frequency of the drive motor 11 can be adjusted to 50-100Hz. When the vibration mechanism is started, the dual-shaft drive motor 11 drives the eccentric wheel 12 to rotate at high speed, generating periodic vibration using the centrifugal force of the eccentric wheel. The vibration is transmitted through the fixed base 10 to the entire wall surface of the ash hopper body 1, causing the ash adhering to the inner wall to fall off due to vibration and flow downwards. High-frequency vibration effectively breaks up the caking and adhesion of ash on the hopper wall, preventing the formation of blockage dead corners, ensuring smooth ash flow, improving ash discharge efficiency, and reducing the workload of manual unclogging and equipment maintenance costs.

[0027] Working Principle: During normal operation, ash material in the ash hopper body 1 enters the hopper pump 2 through the opened ash lower baffle 4, and is then transported to the ash storage silo via the ash conveying pipe 3. At this time, the ash discharge valve 7 on the ash conveying branch pipe 5 is in the closed state. When the ultrasonic sensor 9 of the ash level monitoring mechanism detects that the ash level in the ash hopper has reached the preset high material level threshold, the microcontroller triggers the alarm to sound an alarm. After receiving the alarm, the operator closes the ash lower baffle 4 to block the ash conveying path to the hopper pump 2, and at the same time opens the ash discharge valve 7 and starts the ash conveying branch pipe 5. The negative pressure fan 6 uses negative pressure to pump the ash material in the ash hopper to the ash transport truck through the ash conveying branch pipe 5. During this process, the vibration frequency of the drive motor 11 of the vibration mechanism can be adjusted to 50-100Hz according to the characteristics of the ash material. The dual-shaft drive motor 11 drives the eccentric wheel 12 to rotate and generate vibration, causing the ash adhering to the inner wall of the ash hopper to fall off and be discharged smoothly. When the ash level monitoring mechanism shows that the ash level has dropped to a safe range, the negative pressure fan 6 and the ash discharge valve 7 are turned off, the ash discharge plate 4 of the silo pump is opened, the normal ash conveying mode is restored, and a high-level material cleaning operation is completed.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high-level material cleaning device for an ash hopper, comprising an ash hopper body (1), a hopper pump (2) is provided below the ash hopper body (1) via a connecting pipe, an ash conveying pipe (3) is provided at the bottom of the hopper pump (2), and the outlet end of the ash conveying pipe (3) is connected to an ash storage silo, characterized in that: The ash hopper body (1) has an ash conveying branch pipe (5) on one side. One end of the ash conveying branch pipe (5) is connected to the inner cavity of the ash hopper body (1), and the other end of the ash conveying branch pipe (5) is connected to the ash transport tanker. A negative pressure fan (6) is installed in the middle of the ash conveying branch pipe (5). An ash level monitoring mechanism is installed at the upper end of the inner cavity of the ash hopper body (1). A vibration mechanism is installed on the back of the ash hopper body (1).

2. The high-level material cleaning device for ash hopper according to claim 1, characterized in that: The lower end of the ash hopper body (1) is equipped with a hopper pump ash lowering plate (4) for sealing the ash outlet, and the hopper pump ash lowering plate (4) is inserted into the ash hopper body (1).

3. The high-level material cleaning device for ash hopper according to claim 1, characterized in that: The ash conveying branch pipe (5) is equipped with an ash discharge valve (7) at one end near the ash hopper body (1).

4. The high-level material cleaning device for ash hopper according to claim 1, characterized in that: The ash level height monitoring mechanism includes a fixed plate (8), and the two ends of the fixed plate (8) are fixed to the ash hopper body (1) by screws. An ultrasonic sensor (9) is installed at the middle position of the bottom of the fixed plate (8), and the detection end of the ultrasonic sensor (9) faces the inside of the ash hopper body (1). The output end of the ultrasonic sensor (9) is connected to a microcontroller, and the output end of the microcontroller is connected to an alarm.

5. The high-level material cleaning device for ash hopper according to claim 1, characterized in that: The vibration mechanism includes a fixed seat (10), and the fixed seat (10) is fixed to the ash hopper body (1) by bolts. A dual-shaft drive motor (11) is fixedly installed on the back of the fixed seat (10), and an eccentric wheel (12) is installed on the output shaft of the drive motor (11).

6. The high-level material cleaning device for an ash hopper according to claim 5, characterized in that: The vibration frequency of the drive motor (11) can be adjusted to 50-100Hz.

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