Ash blocking monitoring and automatic ash cleaning device and control method for air chamber of household garbage incinerator

Abstract

This invention provides a device and control method for monitoring and automatically cleaning ash blockage in the air chamber of a municipal solid waste incinerator. The device includes: a level gauge at the bottom of the air chamber; an ash discharge valve at the bottom of each row of air chambers; an ash trough below the air chamber, the ash trough being inclined downwards; a compressed air storage tank at the upper opening of the ash trough; and a slag discharge well at the lower opening of the ash trough. The compressed air storage tank is connected to a jet pipe via an electromagnetic pulse valve, the jet pipe facing into the ash trough. The compressed air storage tank is connected to a pressure transmitter via a pressure guide pipe. The level gauge, ash discharge valve, electromagnetic pulse valve, and pressure transmitter are electrically connected to a controller. The controller opens the ash discharge valve and electromagnetic pulse valve to discharge ash according to a set value and / or a signal from the level gauge. Using the technical solution of this invention, real-time monitoring, timely ash discharge, and diagnosis of ash discharge effectiveness are possible. The method is novel, reliable, easy to implement, and highly reliable.

Description

Technical Field

[0001] This invention relates to the field of waste treatment technology, and in particular to a device and control method for monitoring and automatically cleaning ash blockage in the air chamber of a municipal solid waste incinerator. Background Technology

[0002] Municipal solid waste incineration power generation, as an optimal solution for turning municipal solid waste into a valuable resource, has been widely promoted across the country. Currently, the waste-to-energy incineration industry has transitioned from a phase of rapid development to one of high-standard operation. However, the problem of ash accumulation and blockage in the air chambers remains one of the main reasons affecting the efficient, safe, and long-term operation of incinerators.

[0003] The air chamber, as a key piece of equipment in the incinerator, has two main functions: first, to supply air to the grate in designated areas, ensuring that the waste in those areas is thoroughly dried or burns stably; and second, to collect ash and slag falling from the gaps between the grate bars, the air vents, and between the grate and the side walls, and to promptly remove it using pneumatic conveying or other methods. However, if ash and slag accumulate in the air chamber after falling into it, it can cause problems ranging from minor issues like clogging the air inlet pipes and affecting the airflow, leading to unstable combustion, to more serious issues like overturning the grate, severely impacting safe operation and causing an accidental shutdown. This not only affects production efficiency but also requires significant manpower and resources for equipment restoration.

[0004] Because the wind chamber uses 8-12mm hard steel plates and has about 100mm of external insulation, the interior is hot and dusty, making it impossible to observe the amount of ash accumulation inside through the glass window. Therefore, the general methods for judging ash blockage in the boiler wind chamber are: (1) Observe the combustion status of the fire bed on the grate. If the flame is soft or uneven, it may be that ash blockage has blocked the air duct; (2) Observe if there is a high protrusion of material on the grate or if the grate cannot move. It may be that severe ash blockage is hindering the movement of the grate or the grate has been overturned; (3) When the pneumatic ash discharge air tank is fired, it shows abnormal pressure fluctuations in the air tank. Another method is to match the wind chamber with a manual ash discharge lever. The strength of the lever can be used to judge whether there is ash blockage. Generally, if it is blocked, the lever cannot be pulled or it is very difficult to pull.

[0005] Human observation based on experience requires comprehensive judgment from experienced personnel, but the conclusions are not always accurate. When ash blockage is suspected, the manhole is opened for direct inspection, providing a visual check. However, opening the manhole requires shutting down the incinerator's primary air system to access the high-temperature air chamber manhole for internal inspection. At this point, the combustion state deteriorates rapidly, requiring the injection of fuel oil or natural gas to stabilize combustion in order to meet environmental requirements of furnace temperatures above 850℃. While reliable, this affects the continuous and stable operation of the incinerator, impacting unit efficiency, and increasing operating costs. A manual ash-dropping lever is another option. While this solution does not reduce load, the high temperature (approximately 200-220℃) poses a risk of burns to operators. Furthermore, this method is not intuitive, relying heavily on personal experience. Additionally, the high-temperature air pressure of approximately 1-2 kPa in the air chamber increases the difficulty of manufacturing and maintenance in addressing air leakage in the lever and air chamber. Moreover, both of these methods only address the problem after it occurs, failing to eliminate it at the initial stage. Summary of the Invention

[0006] To address the above technical problems, this invention discloses a monitoring and automatic ash removal device and control method for ash blockage in the air chamber of a municipal solid waste incinerator. By monitoring the ash level in the air chamber and promptly treating the ash in the air chamber, greater impacts such as ash accumulation and blockage can be avoided.

[0007] The technical solution adopted by this invention is as follows:

[0008] A device for monitoring and automatically cleaning ash blockage in the air chamber of a municipal solid waste incinerator is disclosed. A level gauge is installed at the bottom of the air chamber, and an ash discharge valve is installed at the bottom of each row of air chambers. An ash trough is located below the air chamber and is inclined downwards. A compressed air storage tank is installed at the upper opening of the ash trough, and a slag discharge well is installed at the lower opening. The compressed air storage tank is connected to a jet pipe via an electromagnetic pulse valve, and the jet pipe faces into the ash trough, forming a sealed space. The compressed air storage tank is connected to a pressure transmitter via a pressure guide pipe. The level gauge, ash discharge valve, electromagnetic pulse valve, and pressure transmitter are electrically connected to a controller. The controller automatically opens the ash discharge valve and electromagnetic pulse valve periodically according to a set time period, and / or opens the ash discharge valve and electromagnetic pulse valve after logical judgment based on the signals from the level gauge and pressure transmitter. Here, one control method is to automatically discharge ash periodically by opening the ash discharge valve and the solenoid pulse valve according to the set time period. Another method is to open the ash discharge valve and the solenoid pulse valve to discharge ash after making logical judgments based on the signals from the level gauge and the pressure transmitter. In other words, it can enter the automatic unblocking program.

[0009] This technical solution allows for periodic automatic ash discharge by automatically opening the ash discharge valve and solenoid pulse valve at set time intervals. Alternatively, it can automatically activate the ash discharge valve in the air chamber when the ash accumulation reaches a certain level, based on the level gauge. The solenoid pulse valve can be energized and opened, allowing high-pressure compressed air from the compressed air reservoir to rapidly flow into the ash trough. This high-speed pneumatic impact removes the ash and prevents blockage, ensuring timely resolution before problems arise. The pressure drop in the compressed air reservoir is monitored via a pressure transmitter, indicating whether the ash trough is clear. A normal pressure drop indicates a clear ash trough; a low pressure drop suggests potential blockage.

[0010] As a further improvement of the present invention, the level gauge is a switch-type level gauge used to automatically detect the ash and slag accumulation inside the air chamber. Using a switch-type level gauge, ash removal is only performed when the ash and slag in the air chamber reaches a certain level; otherwise, compressed air resources are wasted. Therefore, a material presence signal is detected at a certain height. Given that the primary air gas originates from the waste storage facility and is characterized by odor, low to medium pressure (1-2 kPa), high temperature (200-220°C), and high dust levels, and that the air chamber is a fully enclosed box, continuous analog level measurement is difficult to obtain. Using a switch-type level gauge allows for better detection of whether the internal ash and slag has reached the set height. Furthermore, the switch-type level gauge is a high-temperature and pressure-resistant switch-type level gauge.

[0011] As a further improvement of the present invention, each air chamber is equipped with a differential pressure transmitter for comparing the pressure difference between the air chamber and the common air chamber. The differential pressure transmitter is electrically connected to the controller, automatically detects the ash accumulation in the ash trough, and feeds the information back to the controller. Using the information fed back by the differential pressure transmitter, the ash accumulation and blockage status of the air chamber inlet can be determined, the opening of the ash discharge valve can be controlled, and then the ash discharge program can be started. Under normal circumstances, the pressure difference between the corresponding air chamber and the primary air common air chamber has a certain functional relationship with the air chamber damper opening. The differential pressure transmitter can measure the pressure difference between the air chamber and the common air chamber. Combined with the total air volume and the previous functional relationship, when the measured pressure difference is significantly lower than the functional relationship, it is determined that the air chamber inlet is blocked with ash, and feedback is sent to the controller, which can start the ash discharge program.

[0012] The present invention also discloses a control method for the monitoring and automatic ash removal device for ash blockage in the air chamber of a municipal solid waste incinerator as described above, including a periodic control automatic ash removal mode and an abnormal process ash removal mode.

[0013] The periodic control automatic ash removal mode includes: according to the set periodic timing, the controller controls the ash removal valves to open sequentially from bottom to top according to their positions and then close them after a delay to remove ash. Then, the controller controls the electromagnetic pulse valve to start, using the impact force of the air cannon explosion to discharge the ash and slag falling into the ash trough to the slag discharge well. At the same time, the pressure transmitter measures the pressure change of the compressed air storage tank and feeds it back to the controller to comprehensively evaluate the ash removal condition.

[0014] The abnormal process ash discharge mode includes: the level gauge in each air chamber detects the ash and slag height in the air chamber. When the ash and slag inside reach the set height, the level signal is fed back to the controller. The controller controls the opening of the ash discharge valve of the corresponding air chamber and closes it after a delay to discharge ash. Then, the electromagnetic pulse valve is activated, and the impact force of the air cannon explosion is used to discharge the ash and slag falling into the ash trough to the slag discharge well. At the same time, the pressure transmitter measures the pressure change of the compressed air storage tank and feeds it back to the controller to comprehensively evaluate the ash discharge condition.

[0015] As a further improvement of the present invention, the comprehensive evaluation of ash discharge conditions includes:

[0016] If, during ash discharge, the pressure transmitter measures a pressure drop in the compressed air storage tank that is higher than the set value, the controller will restart the solenoid pulse valve and activate the air cannon to discharge ash after the compressed air storage tank has been filled. If the problem persists after three attempts, an alarm will be issued.

[0017] As a further improvement of the present invention, the control method for the monitoring and automatic ash removal device for ash blockage in the air chamber of a municipal solid waste incinerator also includes:

[0018] Set the periodic timing and start the pulse. When the pressure transmitter feedback information indicates that the compressed air storage tank has reached the set pressure, determine whether the material level has reached the set value or whether the differential pressure of the differential pressure transmitter is normal based on the feedback information of the material level gauges in each air chamber. If the material level has not reached the set value or the differential pressure of the differential pressure transmitter is normal, then enter the periodic control automatic ash discharge mode; if the material level has reached the set value or the differential pressure of the differential pressure transmitter is abnormal, then enter the abnormal process ash discharge mode.

[0019] Furthermore, each air chamber is equipped with a differential pressure transmitter for comparing the pressure difference between the air chamber and the common air chamber. The differential pressure transmitter is electrically connected to the controller to automatically detect the ash accumulation in the ash trough.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] The technical solution of this invention employs a conventional level gauge installed in the air chamber, enabling real-time and reliable monitoring of the amount of ash accumulated inside the air chamber and generating an early warning alarm for ash accumulation in the air chamber immediately. The use of a compressed air pneumatic ash removal structure ensures efficient ash removal and facilitates repeated execution of the program control. Upon automatically detecting a certain amount of ash accumulation, the air chamber ash removal program control is immediately and automatically activated, preventing the ash accumulation from worsening into ash blockage and ensuring more timely handling. A pressure transmitter is used to diagnose the ash discharge effect in the ash trough; the diagnostic method is novel, reliable, and the program is easy to implement. By diagnosing the ash accumulation in the air chamber and the ash blockage in the ash trough, the ash discharge program control is automatically activated, ensuring high reliability. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a monitoring and automatic ash removal device for ash blockage in the air chamber of a municipal solid waste incinerator according to an embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram illustrating the principle of ash blockage monitoring and automatic ash removal control in the air chamber of a municipal solid waste incinerator according to an embodiment of the present invention.

[0024] Figure 3 This is a block diagram of the automatic ash removal control logic according to an embodiment of the present invention.

[0025] The reference numerals in the figures include:

[0026] 1-Grate, 2-Wind chamber, 3-Level gauge, 4-Pressure transmitter, 5-Compressed air storage tank, 6-Solenoid pulse valve, 7-Ash trough, 8-Slag discharge well, 9-Ash discharge valve, 10-Differential pressure transmitter. Detailed Implementation

[0027] The preferred embodiments of the present invention will be described in further detail below.

[0028] like Figure 1As shown, a device for monitoring and automatically cleaning ash blockage in the air chamber 2 of a municipal solid waste incinerator is disclosed. A level gauge 3 is installed at the lower part of the air chamber 2, and an ash discharge valve 9 is installed at the bottom of each row of air chambers 2. An ash trough 7 is located below the air chamber 2, and the ash trough 7 is inclined downwards. A compressed air storage tank 5 is installed at the upper opening of the ash trough 7, and a slag discharge well 8 is installed at the lower opening of the ash trough 7. The compressed air storage tank 5 is connected to a jet pipe via an electromagnetic pulse valve 6, and the jet pipe faces into the ash trough 7 and is completely sealed. The compressed air storage tank 5 is connected to a pressure transmitter 4. The level gauge 3, ash discharge valve 9, electromagnetic pulse valve 6, and pressure transmitter 4 are electrically connected to a controller. The controller controls the opening of the ash discharge valve 9 based on the signal from the level gauge 3 and controls the opening of the electromagnetic pulse valve 6 based on the signal from the pressure transmitter 4. A differential pressure transmitter 10 is installed in each row of air chambers 2 to compare the pressure difference between that air chamber 2 and a common air chamber 2. The differential pressure transmitter 10 is electrically connected to the controller. The level gauge 3 is a high-temperature and pressure-resistant on / off type level gauge 3. The ash discharge valve 9 is a pneumatic ash discharge valve 9.

[0029] The process flow is as follows:

[0030] After fermentation, the waste enters the grate 1 from the feeding platform. Primary air, delivered through the primary air main pipe, is transferred through the air chamber 2 and ventilated through the air holes on the grate casting to the upper surface of the grate. The air chamber 2, with its large storage space, ensures relatively stable air pressure and uniform air distribution. The reciprocating motion of the grate 1 moves the waste from the front drying zone to the middle combustion zone. During this process, most of the waste is burned into ash and then moves to the rear burnout zone. Some fine ash falls into the air chamber 2 through gaps between grate plates, grate air holes, and gaps between the grate and side walls, accumulating at the bottom. The pneumatic air chamber ash discharge valve 9 is periodically opened, and the ash in the air chamber 2 falls into the ash trough 7 under the action of air pressure and gravity. When the electromagnetic pulse valve 6 is energized, the compressed air in the compressed air storage tank 5 blows the ash in the ash trough 7 into the ash discharge well through an explosive air jet. This completes the primary air chamber ash discharge process.

[0031] The ash in the air chamber 2 must reach a certain amount before cleaning; otherwise, compressed air resources will be wasted. Therefore, a material presence signal is detected at a certain height. Since the primary air is a foul-smelling, low-to-medium pressure (1-2 kPa), high-temperature (200-220°C), and high-dust gas from the waste storage facility, the air chamber 2 must be a fully enclosed box, making continuous analog level measurement difficult to obtain. Therefore, this embodiment uses a high-temperature and pressure-resistant switch-type level gauge to detect whether the internal ash has reached the set height. Simultaneously, when the electromagnetic pulse valve 6 is activated, the pressure transmitter 5 detects whether the pressure change in the compressed air storage tank 6 reaches a preset value (adjustable) to ensure sufficient compressed air volume to meet the operating energy of the air cannon. Structurally, the storage tank is isolated from the downwardly inclined ash trough 7 by the electromagnetic pulse valve 6. When the electromagnetic pulse valve 6 is energized and opened, the high-pressure compressed air from the compressed air storage tank 5 rapidly rushes into the ash trough 7 through the electromagnetic pulse valve 6, and the high-speed pneumatic impact on the ash in the ash trough 7 removes the ash. When the pressure drop reported by the pressure transmitter is normal, it indicates that the ash trough 7 is unobstructed; when the pressure drop is small, it indicates that the ash trough 7 may be blocked. Thus, the unobstructedness of the ash trough is also determined by the pressure drop of the compressed air reservoir 6.

[0032] Under normal circumstances, the pressure difference between the corresponding air chamber and the primary air common air chamber has a certain functional relationship with the opening of the air chamber damper. The differential pressure transmitter 10 can measure the pressure difference between the air chamber and the common air chamber. Combined with the total air volume and the previous functional relationship, when the measured pressure difference is significantly lower than the functional relationship, it is judged as a warning alarm for ash blockage at the air chamber inlet, and the program automatically starts the ash discharge control.

[0033] The control method for the above-mentioned monitoring and automatic ash removal device for ash blockage in the air chamber of a municipal solid waste incinerator is shown in the control block diagram below. Figure 2 As shown, the logic block diagram is as follows: Figure 3 As shown, the process of automatic detection and ash removal is controlled automatically. This control method includes:

[0034] The ash level is detected by the level gauge in the air chamber. A reliable rotary level switch is usually installed at a certain height. When the level reaches this position, the level signal is sent to the controller of the DCS (or PLC) control system. After logic operation, the controller outputs a control signal to open the ash discharge valve of the pneumatic air chamber. Then, the electromagnetic pulse valve is activated, and the impact force of the air cannon explosion is used to discharge the ash that has fallen into the ash trough.

[0035] Simultaneously, the pressure change measured by the pressure transmitter of the compressed air storage tank is sent to the controller of the DCS (or PLC) control system. After logical calculation, the ash discharge condition is comprehensively evaluated. If the pressure drop of the compressed air storage tank is insufficient during ash discharge, the electromagnetic pulse valve is restarted to open the air cannon for ash discharge after the storage tank is fully charged. If the problem persists after three attempts, an alarm is triggered, requiring manual inspection and handling. In this way, by immediately and automatically starting the ash discharge program in the air chamber, ash adhering to the walls can be removed through the air chamber, and ash can be removed by vibration of the system using the air cannon.

[0036] Specifically, the automatic ash removal control method includes two modes: one is the periodic control automatic ash removal mode, and the other is the abnormal process ash removal mode, which automatically removes ash when ash accumulation in the air chamber or ash blockage in the ash trough is detected.

[0037] (1) When automatic ash removal is put into operation, the periodic control automatic ash removal mode is started, and the cycle begins to be counted.

[0038] (2) After the pressure of the air storage tank is reached, check whether there is ash blockage in the air chamber. If not, the first column is initially started (it becomes "cycle time is up" after one week) and the cycle ash discharge program of the first column begins. First, the air chamber ash discharge valves are opened in reverse order from bottom to top according to their positions in the air chamber, and then closed after a delay, so that the ash in the air chamber falls naturally into the ash trough under the air chamber pressure and gravity. After the ash discharge of each air chamber is completed, the electromagnetic pulse valve is opened to discharge ash with an air cannon. The ash in the ash trough is pneumatically conveyed by the explosive impact force of the compressed air in the compressed air storage tank. At the same time, the pressure transmitter is used to check whether the pressure drop of the compressed air storage tank is normal. If it meets the set value, the cycle ash discharge program of this column is completed. If it does not meet the set value, the electromagnetic pulse valve is opened again to discharge ash after the pressure of the compressed air storage tank is normal. After three times, an alarm for abnormal ash discharge of the first cycle of column 1 is issued and the ash discharge of this column ends.

[0039] (3) After the pressure of the air storage bag is reached, check whether there is a material level signal in the air chamber or the air chamber differential pressure is abnormal. If there is a material level signal, it indicates that there is ash accumulation. If there is an abnormal air chamber differential pressure, it indicates that there may be ash accumulation blocking the air chamber inlet. If either of these two states exists, the abnormal process ash discharge mode will be entered, the periodic action will be paused, and the cycle timer will be paused at the same time.

[0040] First, based on the feedback from the level gauge, determine which air chamber is experiencing an anomaly. If the first air chamber has a level signal or abnormal differential pressure, it indicates that ash accumulation has reached a certain level. In this case, first open the corresponding air chamber's ash discharge valve and close it after a delay. Then, open the electromagnetic pulse valve to discharge ash. The explosive impact force of compressed air from the compressed air reservoir pneumatically conveys the ash slag into the ash trough. Check if the pressure drop of the pressure transmitter meets the set value. If it does, check again for a level signal in the air chamber. If so, repeat the ash discharge level signal process. Check if the pressure drop of the compressed air reservoir meets the set value. If not, wait for the pressure in the compressed air reservoir to return to normal before continuously controlling ash discharge from the ash trough. During this process, if there is a level signal in the air chamber more than three times, an air chamber ash discharge anomaly alarm is issued. If the pressure drop of the compressed air reservoir is unqualified more than three times, an ash trough ash discharge anomaly alarm is issued, prompting manual on-site inspection and confirmation, and ending the ash discharge process for this section.

[0041] (4) When the periodic ash removal and ash blocking procedure of the first column of air chamber is completed or the abnormal alarm during the process is completed, return to the air storage tank pressure detection step; after the air storage tank pressure reaches the preset value (pressure is normal), switch to the second column, and the control method is the same as the first column. After all the columns have completed their actions in this way, the cycle timer is reset and the completion status of each column is reset according to the set cycle, and the ash removal command of the first column is issued again.

[0042] In automatic operation, the system performs periodic actions based on time cycles to meet the ash removal needs under normal working conditions. It also performs targeted ash removal actions based on the ash accumulation in the air chamber. This ensures that a certain amount of ash is removed from the air chamber in a timely manner and also allows for necessary inspection and cleaning of the ash trough, effectively preventing ash blockage in the air chamber or ash trough and making the ash removal process more reliable.

[0043] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A kind of domestic waste incinerator air chamber ash blocking monitoring and automatic ash cleaning device, it is characterized by: The lower part of each air chamber is equipped with a level gauge for detecting the ash and slag height within the air chamber. Each row of air chambers has an ash discharge valve at its bottom. Below each air chamber is an ash trough, which is inclined downwards. A compressed air storage tank is located at the upper opening of the ash trough, and a slag discharge well is located at the lower opening. The compressed air storage tank is connected to a jet pipe via an electromagnetic pulse valve, with the jet pipe facing inwards to form a sealed space within the ash trough. A pressure transmitter is connected to the compressed air storage tank to measure pressure changes. The level gauge, ash discharge valve, electromagnetic pulse valve, and pressure transmitter are electrically connected to a controller. Each row of air chambers is equipped with a differential pressure transmitter for comparing the pressure difference between that air chamber and the common air chamber. The differential pressure transmitter is electrically connected to the controller, automatically detecting the ash and slag accumulation in the ash trough and feeding the information back to the controller. The controller automatically opens the ash discharge valve and the solenoid pulse valve according to the set time period to periodically discharge ash. It also opens the ash discharge valve and the solenoid pulse valve to discharge ash after making logical judgments based on the signals from the level gauge, the pressure transmitter, and the differential pressure transmitter.

2. The monitoring and automatic ash removal device for ash blockage in the air chamber of a municipal solid waste incinerator according to claim 1, characterized in that: The level gauge is a switch-type level gauge.

3. The control method for the monitoring and automatic ash removal device for ash blockage in the air chamber of a municipal solid waste incinerator as described in claim 1, characterized in that: This includes a periodic automatic ash removal mode and an abnormal process ash removal mode; The periodic control automatic ash removal mode includes: according to the set periodic timing, the controller controls the ash removal valves to open sequentially from bottom to top according to their positions and then close them after a delay to remove ash. Then, the controller controls the electromagnetic pulse valve to start, using the impact force of the air cannon explosion to discharge the ash and slag falling into the ash trough to the slag discharge well. At the same time, the pressure transmitter measures the pressure change of the compressed air storage tank and feeds it back to the controller to comprehensively evaluate the ash removal condition. The abnormal process ash removal mode includes: The level gauge in each air chamber detects the ash and slag height in that chamber. When the ash and slag inside reach the set height, the level signal is fed back to the controller. The controller then controls the opening of the ash discharge valve in the corresponding air chamber and closes it after a delay to discharge the ash. Then, it controls the start of the electromagnetic pulse valve to use the impact force of the air cannon explosion to discharge the ash and slag falling into the ash trough to the ash discharge well. At the same time, the pressure transmitter measures the pressure change of the compressed air storage tank and feeds it back to the controller to comprehensively evaluate the ash discharge condition. Also includes: Set the periodic timing and start the pulse. When the pressure transmitter feedback information indicates that the compressed air storage tank has reached the set pressure, determine whether the material level has reached the set value or whether the differential pressure of the differential pressure transmitter is normal based on the feedback information of the material level gauges in each air chamber. If the material level has not reached the set value or the differential pressure of the differential pressure transmitter is normal, then enter the periodic control automatic ash discharge mode; if the material level has reached the set value or the differential pressure of the differential pressure transmitter is abnormal, then enter the abnormal process ash discharge mode.

4. The control method for the monitoring and automatic ash removal device for ash blockage in the air chamber of a municipal solid waste incinerator according to claim 3, characterized in that: The comprehensive evaluation of ash discharge conditions includes: If, during ash discharge, the pressure transmitter measures a pressure drop in the compressed air storage tank that is higher than the set value, the controller will restart the solenoid pulse valve and activate the air cannon to discharge ash after the compressed air storage tank has been filled. If the problem persists after three attempts, an alarm message will be issued.

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