Desulfurization absorption tower slurry overflow monitoring device and monitoring method

Abstract

The application discloses a kind of desulfurization absorption tower slurry overflow monitoring device and monitoring method, the monitoring device includes liquid collecting tank, controller, the bottom of liquid collecting tank is equipped with slurry discharge pipe, control valve is equipped on slurry discharge pipe, the top and bottom of inside liquid collecting tank are equipped with first temperature sensor and second temperature sensor respectively, liquid level meter is equipped in liquid collecting tank, the upper portion of liquid collecting tank is equipped with liquid collecting overflow pipe, controller obtains first real-time temperature, second real-time temperature and real-time liquid level, if the temperature difference of first real-time temperature and second real-time temperature exceeds preset temperature difference threshold, control control valve is closed, and the liquid level change rate of real-time liquid level in preset time period is calculated, according to the liquid level change rate and the preset cross-sectional area of liquid collecting tank, the real-time slurry overflow flow of desulfurization absorption tower overflow pipe is calculated, whether the overflow of desulfurization absorption tower is judged according to real-time slurry overflow flow Abnormality.The application realizes the overflow state of automatic real-time monitoring desulfurization absorption tower, prevent overflow accident.

Description

Technical Field

[0001] This invention relates to the field of flue gas desulfurization technology in coal-fired power plants, and in particular to a monitoring device and method for monitoring the overflow of slurry in a desulfurization absorption tower. Background Technology

[0002] In the limestone-gypsum wet flue gas desulfurization process of coal-fired power plants, the slurry level and quality within the desulfurization absorption tower are crucial indicators affecting the safe operation and environmental compliance of the desulfurization system. Poor slurry quality, leading to foaming and overflow, will result in environmental pollution and resource waste, posing significant safety and environmental risks. Therefore, real-time monitoring of the slurry flow status in the desulfurization absorption tower, especially overflow, helps to adjust operations promptly and improve the stability and safety of the desulfurization unit. Currently, the overflow status of the existing desulfurization absorption tower is mainly determined by manually observing whether slurry is flowing out of the overflow pipe, which has drawbacks such as untimely detection and slow subsequent response. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of existing desulfurization absorption towers that rely on manual observation to monitor slurry overflow, which leads to untimely detection, slow response to subsequent treatment, increased overflow risk, and low safety. This invention provides a desulfurization absorption tower slurry overflow monitoring device and monitoring method.

[0004] The present invention provides a slurry overflow monitoring device for a desulfurization absorption tower, comprising a collection tank connected to the overflow pipe of the desulfurization absorption tower and a controller. The bottom of the collection tank is provided with a slurry discharge pipe, and a control valve is provided on the slurry discharge pipe. A first temperature sensor and a second temperature sensor are respectively provided at the top and bottom of the collection tank. A level gauge is provided inside the collection tank. An overflow pipe is provided at the upper part of the collection tank, and the overflow pipe is connected to the slurry discharge pipe. The overflow pipe is located after the control valve.

[0005] A first temperature sensor, which is communicatively connected to the controller, is used to detect the first real-time temperature at the top of the liquid collection tank.

[0006] The second temperature sensor is communicatively connected to the controller and is used to detect the second real-time temperature at the bottom of the liquid collection tank.

[0007] A level gauge, which is communicatively connected to the controller, is used to detect the real-time liquid level in the collection tank;

[0008] The controller, which is communicatively connected to the control valve, is used to acquire the first real-time temperature, the second real-time temperature, and the real-time liquid level. If the temperature difference between the first real-time temperature and the second real-time temperature exceeds a preset temperature difference threshold, the controller controls the control valve to close and calculates the liquid level change rate within a preset time period. Based on the liquid level change rate and the preset cross-sectional area of ​​the collection tank, the controller calculates the real-time slurry overflow rate of the desulfurization absorption tower overflow pipe and determines whether the desulfurization absorption tower has an overflow abnormality based on the real-time slurry overflow rate.

[0009] In one of the alternative technical solutions, the controller is further configured to:

[0010] The rate of change of liquid level is calculated using the following formula:

[0011] LIR = ΔH / Δt;

[0012] Wherein, LIR is the liquid level change rate; ΔH is the liquid level difference of the real-time liquid level within the preset time period; and Δt is the preset time period.

[0013] In one of the alternative technical solutions, the controller is further configured to:

[0014] The real-time slurry overflow rate is calculated using the following formula:

[0015] Q = S × LIR;

[0016] Where Q is the real-time slurry overflow rate; S is the preset cross-sectional area.

[0017] In one of the alternative technical solutions, the controller is further configured to:

[0018] If the real-time liquid level reaches the preset overflow height of the collection tank, the control valve is opened to discharge the slurry in the collection tank;

[0019] If the slurry in the collection tank is drained, the control valve is closed, and this process is repeated until it is determined that the overflow of the desulfurization absorption tower is normal.

[0020] In one of the alternative technical solutions, the controller is further configured to:

[0021] If the real-time slurry overflow exceeds the preset flow threshold, the overflow of the desulfurization absorption tower is determined to be abnormal.

[0022] In one of the alternative technical solutions, the controller is further configured to:

[0023] If an abnormal overflow is detected in the desulfurization absorption tower, a linkage signal is sent. The linkage signal is used to trigger the desulfurization absorption tower control system to lower the liquid level in the desulfurization absorption tower.

[0024] In one of the alternative technical solutions, the liquid collection tank is provided with a partition, which vertically divides the liquid collection tank into a buffer chamber and a measuring chamber that are interconnected at the bottom. The liquid level gauge, the first temperature sensor and the second temperature sensor are disposed in the measuring chamber, and one end of the liquid collection overflow pipe is connected to the upper part of the measuring chamber.

[0025] The technical solution of the present invention also provides a monitoring method for the desulfurization absorption tower slurry overflow monitoring device as described above, comprising:

[0026] The system acquires the first real-time temperature detected by the first temperature sensor, the second real-time temperature detected by the second temperature sensor, and the real-time liquid level detected by the level gauge.

[0027] If the temperature difference between the first real-time temperature and the second real-time temperature exceeds a preset temperature difference threshold, the control valve is closed, and the rate of change of the real-time liquid level within a preset time period is calculated.

[0028] The real-time slurry overflow rate of the desulfurization absorption tower overflow pipe is calculated based on the liquid level change rate and the preset cross-sectional area of ​​the liquid collection tank.

[0029] The overflow rate of the desulfurization absorption tower is determined based on the real-time slurry overflow rate.

[0030] In one alternative technical solution, the step of acquiring the first real-time temperature detected by the first temperature sensor, the second real-time temperature detected by the second temperature sensor, and the real-time liquid level detected by the level gauge further includes:

[0031] If the real-time liquid level reaches the preset overflow height of the collection tank, the control valve is opened to discharge the slurry in the collection tank;

[0032] If the slurry in the collection tank is drained, the control valve is closed, and this process is repeated until it is determined that the overflow of the desulfurization absorption tower is normal.

[0033] In one of the alternative technical solutions, determining whether the desulfurization absorption tower has an abnormal overflow based on the real-time slurry overflow rate includes:

[0034] If the real-time slurry overflow exceeds the preset flow threshold, the overflow of the desulfurization absorption tower is determined to be abnormal.

[0035] The above technical solution has the following beneficial effects: By connecting the collection tank to the overflow pipe of the desulfurization absorption tower, and installing a first temperature sensor, a second temperature sensor, and a level gauge inside the collection tank, and installing a slurry discharge pipe and a collection overflow pipe outside the collection tank, with a control valve on the slurry discharge pipe, when the controller receives the first real-time temperature detected by the first temperature sensor and the second real-time temperature detected by the second temperature sensor, and the temperature difference between the first real-time temperature and the second real-time temperature exceeds a preset temperature difference threshold, the controller closes the control valve and calculates the rate of change of the real-time liquid level obtained by the level gauge within a preset time period. Based on the rate of change of the liquid level and the preset cross-sectional area of ​​the collection tank, the real-time slurry overflow rate of the desulfurization absorption tower overflow pipe is calculated. Based on the real-time slurry overflow rate, it is determined whether the desulfurization absorption tower is overflowing abnormally, thus realizing automatic real-time monitoring of the overflow status of the desulfurization absorption tower, preventing overflow accidents, and improving safety. Attached Figure Description

[0036] The disclosure of this invention will become more readily understood by referring to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings:

[0037] Figure 1 This is a schematic diagram of a desulfurization absorption tower slurry overflow monitoring device according to an embodiment of the present invention;

[0038] Figure 2 The flowchart illustrates the monitoring method of a desulfurization absorption tower slurry overflow monitoring device according to an embodiment of the present invention. Detailed Implementation

[0039] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0040] It is readily understood that, based on the technical solution of this invention, various structural and implementation methods can be interchanged by those skilled in the art without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of the invention.

[0041] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the structures shown in the accompanying drawings. They are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0042] like Figure 1As shown in the figure, an embodiment of the present invention provides a slurry overflow monitoring device for a desulfurization absorption tower, including a collection tank 20 connected to the overflow pipe 11 of the desulfurization absorption tower and a controller. The bottom of the collection tank 20 is provided with a slurry discharge pipe 21, and a control valve 211 is provided on the slurry discharge pipe 21. A first temperature sensor 22 and a second temperature sensor 23 are respectively provided at the top and bottom of the collection tank 20. A level gauge 24 is provided inside the collection tank 20. An overflow pipe 25 is provided at the upper part of the collection tank 20, and the overflow pipe 25 is connected to the slurry discharge pipe 21. The overflow pipe 21 is located after the control valve 211.

[0043] The first temperature sensor 22 is connected in communication with the controller and is used to detect the first real-time temperature at the top of the liquid collection tank 20.

[0044] The second temperature sensor 23 is connected in communication with the controller and is used to detect the second real-time temperature at the bottom of the liquid collection tank 20.

[0045] The level gauge 24 is connected to the controller and is used to detect the real-time liquid level in the collection tank 20;

[0046] The controller is communicatively connected to the control valve 211 and is used to acquire the first real-time temperature, the second real-time temperature, and the real-time liquid level. If the temperature difference between the first real-time temperature and the second real-time temperature exceeds the preset temperature difference threshold, the controller controls the control valve 211 to close and calculates the liquid level change rate within a preset time period. Based on the liquid level change rate and the preset cross-sectional area of ​​the collection tank 20, the controller calculates the real-time slurry overflow rate of the desulfurization absorption tower overflow pipe 11 and determines whether the desulfurization absorption tower 10 has an overflow abnormality based on the real-time slurry overflow rate.

[0047] The desulfurization absorption tower slurry overflow monitoring device provided in this embodiment is applied to the desulfurization absorption tower system, and mainly includes a collection tank 20 and a controller.

[0048] The collection tank 20 is connected to the desulfurization absorption tower 10 via the overflow pipe 11. The collection tank 20 is used to collect the slurry overflowing from the desulfurization absorption tower 10. A slurry discharge pipe 21 is located at the bottom of the collection tank 20, connecting to the outside environment, such as a pit. A control valve 211 is installed on the slurry discharge pipe 21, which controls the opening and closing of the slurry discharge pipe 21. During use, the control valve 211 is normally open to facilitate connection to the outside environment.

[0049] The top and bottom of the collection tank 20 are respectively equipped with a first temperature sensor 22 and a second temperature sensor 23. The first temperature sensor 22 is used to detect the temperature of the upper part of the collection tank 20, and the second temperature sensor 23 is used to detect the temperature of the lower part of the collection tank 20. Under normal circumstances, the first real-time temperature detected by the first temperature sensor 22 and the second real-time temperature detected by the second temperature sensor 23 are the ambient temperature or the temperature of the humid heat emitted by the slurry. When slurry overflows through the overflow pipe 11 of the desulfurization absorption tower, the second real-time temperature is the slurry temperature. When the controller receives the first real-time temperature and the second real-time temperature, it calculates the temperature difference between the first real-time temperature and the second real-time temperature, and determines whether the slurry has overflowed based on the temperature difference. When it determines that the slurry has overflowed, it controls the control valve 211 to close, and collects the overflowed slurry through the collection tank 20.

[0050] A level gauge 24 is also installed on the inner top of the collection tank 20. The level gauge 24 is used to detect the real-time liquid level in the collection tank 20. When the slurry overflows, the controller calculates the liquid level change rate based on the real-time liquid level within a preset time period (e.g., within 10 seconds). Then, based on the liquid level change rate and the cross-sectional area of ​​the collection tank 20, it calculates the real-time slurry overflow rate of the desulfurization absorption tower overflow pipe 11. Based on the real-time slurry overflow rate, it determines whether the desulfurization absorption tower 10 is overflowing abnormally. For example, it determines whether the real-time slurry overflow rate exceeds the preset flow threshold. If it is, it is determined that the overflow is abnormal; otherwise, it is determined that the overflow is normal.

[0051] A liquid collection overflow pipe 25 is provided on the upper middle side of the liquid collection tank 20. One end of the liquid collection overflow pipe 25 is connected to the liquid collection tank 20, and the other end of the liquid collection overflow pipe 25 is connected to the slurry discharge pipe 21. The other end of the liquid collection overflow pipe 25 is located behind the control valve 211. When the slurry in the liquid collection tank 20 reaches the overflow height of the liquid collection overflow pipe 25, the controller controls the control valve 211 to open, and the slurry in the liquid collection tank 20 is discharged through the slurry discharge pipe 21 to prevent the liquid collection tank 20 from bursting due to excessive slurry in the liquid collection tank 20.

[0052] In order to improve detection accuracy, the first temperature sensor 22 and the second temperature sensor 23 are symmetrically arranged at the top and bottom of the liquid collection tank 20.

[0053] In this embodiment, the top and bottom refer to the sides relative to the ground. The side furthest from the ground is the top, and the side closest to the ground is the bottom.

[0054] The preset temperature threshold can be set according to user needs.

[0055] Among them, the control valve 211 is preferably an electric valve.

[0056] The controller can be an electronic device with processing capabilities, such as an industrial controller, for example, a distributed control system (DCS). Preferably, the present invention is applied to a programmable logic controller (PLC).

[0057] This invention connects a collection tank to the overflow pipe of a desulfurization absorption tower. A first temperature sensor, a second temperature sensor, and a level gauge are installed inside the collection tank. A slurry discharge pipe and a collection overflow pipe are installed outside the collection tank. A control valve is installed on the slurry discharge pipe. When the controller receives a first real-time temperature detected by the first temperature sensor and a second real-time temperature detected by the second temperature sensor, and the temperature difference between the first and second real-time temperatures exceeds a preset temperature difference threshold, the control valve is closed. The controller also calculates the rate of change of the real-time liquid level obtained by the level gauge within a preset time period. Based on the rate of change of the liquid level and the preset cross-sectional area of ​​the collection tank, the real-time slurry overflow rate of the desulfurization absorption tower is calculated. The real-time slurry overflow rate is used to determine whether the desulfurization absorption tower is overflowing abnormally. This achieves automatic real-time monitoring of the overflow status of the desulfurization absorption tower, preventing overflow accidents and improving safety.

[0058] In one of the alternative technical solutions, to improve accuracy, the controller is also used for:

[0059] The rate of change of liquid level is calculated using the following formula:

[0060] LIR = ΔH / Δt;

[0061] Where LIR is the rate of change of liquid level; ΔH is the difference in real-time liquid level within a preset time period; and Δt is the preset time period.

[0062] In one of the alternative technical solutions, to further improve accuracy, the controller is also used for:

[0063] The real-time slurry overflow rate is calculated using the following formula:

[0064] Q = S × LIR;

[0065] Where Q is the real-time slurry overflow rate; S is the preset cross-sectional area.

[0066] In one of the alternative technical solutions, the controller is also used for:

[0067] If the real-time liquid level reaches the preset overflow height of the collection tank, control valve 211 will be opened to discharge the slurry in collection tank 20.

[0068] If the slurry in the collection tank 20 is drained, control valve 211 is closed, and the cycle continues until it is determined that the overflow of the desulfurization absorption tower 10 is normal.

[0069] When the temperature difference between the first real-time temperature and the second real-time temperature is determined to exceed the preset temperature difference threshold, the controller controls the control valve 211 to close and monitors the real-time liquid level in the collection tank 20 in real time through the liquid level gauge 24. If the real-time liquid level reaches the preset overflow height of the collection tank (which can be set at the height of the collection overflow pipe 25), the controller controls the control valve 211 to open, emptying the slurry in the collection tank 20, and controls the control valve 211 to close. At the same time, the real-time slurry overflow rate is monitored in real time. This process is repeated until it is determined that the overflow of the desulfurization absorption tower 10 is normal, that is, the real-time slurry overflow rate does not exceed the preset flow rate threshold.

[0070] In one of the alternative technical solutions, the controller is also used for:

[0071] If the real-time slurry overflow exceeds the preset flow threshold, the overflow of the desulfurization absorption tower 10 is determined to be abnormal.

[0072] The controller determines whether the real-time slurry overflow exceeds the preset flow threshold. If it does, it determines that the overflow of the desulfurization absorption tower 10 is abnormal; otherwise, it determines that the overflow of the desulfurization absorption tower 10 is normal.

[0073] The preset traffic threshold can be set according to user needs.

[0074] In one of the alternative technical solutions, the controller is also used for:

[0075] If an overflow abnormality is detected in the desulfurization absorption tower 10, a linkage signal is sent. The linkage signal is used to trigger the desulfurization absorption tower control system to lower the liquid level in the desulfurization absorption tower 10.

[0076] When the controller detects an abnormal overflow in the desulfurization absorption tower 10, it automatically triggers an alarm and sends a linkage signal to the desulfurization absorption tower control system to interlock and lower the liquid level in the desulfurization absorption tower 10, such as by adding defoaming agent or starting the sump pump, to further reduce the risk of overflow and improve safety.

[0077] In one of the alternative technical solutions, the liquid collection tank 20 is provided with a partition 26, which vertically divides the liquid collection tank 20 into a buffer chamber 27 and a measuring chamber 28 that are interconnected at the bottom. The liquid level gauge 24, the first temperature sensor 22 and the second temperature sensor 23 are arranged in the measuring chamber 28, and one end of the liquid collection overflow pipe 25 is connected to the upper part of the measuring chamber 28.

[0078] A partition 26 is provided in the middle of the liquid collection tank 20. The partition 26 divides the inner cavity of the liquid collection tank 20 into two interconnected buffer chambers 27 and measuring chambers 28. The buffer chamber 27 is used to buffer the slurry overflowing from the overflow pipe of the desulfurization absorption tower, so that the slurry can enter the measuring chamber 28 smoothly and prevent the slurry from impacting the first temperature sensor 22, the second temperature sensor 23 and the level gauge 24, thereby reducing the measurement accuracy.

[0079] like Figure 2 As shown, an embodiment of the present invention provides a monitoring method for a desulfurization absorption tower slurry overflow monitoring device as described above, comprising:

[0080] Step S201: Obtain the first real-time temperature detected by the first temperature sensor, the second real-time temperature detected by the second temperature sensor, and the real-time liquid level detected by the level gauge;

[0081] Step S202: If the temperature difference between the first real-time temperature and the second real-time temperature exceeds the preset temperature difference threshold, control the control valve to close and calculate the liquid level change rate of the real-time liquid level within the preset time period.

[0082] Step S203: Calculate the real-time slurry overflow rate of the desulfurization absorption tower overflow pipe based on the liquid level change rate and the preset cross-sectional area of ​​the collection tank;

[0083] Step S204: Determine whether the desulfurization absorption tower is overflowing abnormally based on the real-time slurry overflow rate.

[0084] Specifically, this embodiment is mainly applied to the desulfurization absorption tower slurry overflow monitoring device in the above embodiment.

[0085] First, when the controller receives the first real-time temperature detected by the first temperature sensor, the second real-time temperature detected by the second temperature sensor, and the real-time liquid level detected by the level gauge, it calculates the temperature difference between the first real-time temperature and the second real-time temperature. When the temperature difference is significantly greater than 0, it indicates that there is slurry overflowing in the desulfurization absorption tower.

[0086] Then, step S202 is executed to close the control valve and calculate the real-time liquid level change rate within a preset time period (e.g., 5s).

[0087] Next, step S203 is executed to calculate the real-time slurry overflow rate of the desulfurization absorption tower overflow pipe based on the liquid level change rate and the preset cross-sectional area of ​​the collection tank.

[0088] Finally, step S204 is executed to determine whether the real-time slurry overflow rate exceeds the preset flow rate threshold. If so, the overflow is found to be abnormal; otherwise, the overflow is normal.

[0089] This invention acquires a first real-time temperature detected by a first temperature sensor, a second real-time temperature detected by a second temperature sensor, and a real-time liquid level detected by a level gauge. If the temperature difference between the first and second real-time temperatures exceeds a preset temperature difference threshold, the control valve is closed. The invention also calculates the rate of change of the real-time liquid level within a preset time period. Based on the rate of change of the liquid level and the preset cross-sectional area of ​​the collection tank, the real-time slurry overflow rate of the desulfurization absorption tower overflow pipe is calculated. The real-time slurry overflow rate is used to determine whether the desulfurization absorption tower is overflowing abnormally. This enables automatic real-time monitoring of the overflow status of the desulfurization absorption tower, preventing overflow accidents and improving safety.

[0090] In one embodiment, step S201, followed by:

[0091] If the real-time liquid level reaches the preset overflow height of the collection tank, the control valve will open to discharge the slurry in the collection tank.

[0092] If the slurry in the collection tank is drained, the control valve is closed, and the cycle continues until it is determined that the overflow of the desulfurization absorption tower is normal.

[0093] When the temperature difference between the first real-time temperature and the second real-time temperature exceeds the preset temperature difference threshold, the controller controls the control valve to close and monitors the real-time liquid level in the collection tank through the liquid level gauge. If the real-time liquid level reaches the preset overflow height of the collection tank (the overflow pipe can be set at a certain height), the controller controls the control valve to open, emptying the slurry in the collection tank, and then controls the control valve to close. At the same time, the real-time slurry overflow rate is monitored in real time. This process is repeated until it is determined that the overflow of the desulfurization absorption tower is normal, that is, the real-time slurry overflow rate does not exceed the preset flow rate threshold.

[0094] In one embodiment, to improve accuracy, step S202 includes:

[0095] The rate of change of liquid level is calculated using the following formula:

[0096] LIR = ΔH / Δt;

[0097] Where LIR is the rate of change of liquid level; ΔH is the difference in real-time liquid level within a preset time period; and Δt is the preset time period.

[0098] In one embodiment, to further improve accuracy, step S203 includes:

[0099] The real-time slurry overflow rate is calculated using the following formula:

[0100] Q = S × LIR;

[0101] Where Q is the real-time slurry overflow rate; S is the preset cross-sectional area.

[0102] In one embodiment, step S204 includes:

[0103] If the real-time slurry overflow exceeds the preset flow threshold, the overflow of the desulfurization absorption tower is determined to be abnormal.

[0104] The controller determines whether the real-time slurry overflow exceeds the preset flow threshold. If it does, it determines that the overflow of the desulfurization absorption tower is abnormal; otherwise, it determines that the overflow of the desulfurization absorption tower is normal.

[0105] The preset traffic threshold can be set according to user needs.

[0106] In one embodiment, step S204, followed by:

[0107] If an abnormal overflow is detected in the desulfurization absorption tower, a linkage signal is sent. The linkage signal is used to trigger the desulfurization absorption tower control system to lower the liquid level in the desulfurization absorption tower 10.

[0108] When the controller detects an abnormal overflow in the desulfurization absorption tower, it automatically triggers an alarm and sends a linkage signal to the desulfurization absorption tower control system to interlock and lower the liquid level in the desulfurization absorption tower, such as by adding defoaming agent or starting the sump pump, to further reduce the risk of overflow and improve safety.

[0109] The above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, and are not intended to limit them. Although the embodiments of the present invention have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A monitoring device for slurry overflow in a desulfurization absorption tower, characterized in that, The system includes a collection tank connected to the overflow pipe of the desulfurization absorption tower, and a controller. The bottom of the collection tank is equipped with a slurry discharge pipe, and a control valve is installed on the slurry discharge pipe. A first temperature sensor and a second temperature sensor are respectively installed at the top and bottom of the collection tank. A level gauge is installed inside the collection tank. An overflow pipe is located at the top of the collection tank and is connected to the slurry discharge pipe. The overflow pipe is positioned after the control valve. A first temperature sensor, which is communicatively connected to the controller, is used to detect the first real-time temperature at the top of the liquid collection tank. The second temperature sensor is communicatively connected to the controller and is used to detect the second real-time temperature at the bottom of the liquid collection tank. A level gauge, which is communicatively connected to the controller, is used to detect the real-time liquid level in the collection tank; The controller is communicatively connected to the control valve and is used to acquire the first real-time temperature, the second real-time temperature, and the real-time liquid level. If the temperature difference between the first real-time temperature and the second real-time temperature exceeds a preset temperature difference threshold, the controller controls the control valve to close and calculates the liquid level change rate within a preset time period. Based on the liquid level change rate and the preset cross-sectional area of ​​the collection tank, the controller calculates the real-time slurry overflow rate of the desulfurization absorption tower overflow pipe and determines whether the desulfurization absorption tower has an overflow abnormality based on the real-time slurry overflow rate. The controller is also used for: The rate of change of liquid level is calculated using the following formula: ; in, The liquid level change rate; The difference in real-time liquid level within the preset time period; The preset time period; The real-time slurry overflow rate is calculated using the following formula: ; in, S is the real-time slurry overflow rate; S is the preset cross-sectional area.

2. The desulfurization absorption tower slurry overflow monitoring device as described in claim 1, characterized in that, The controller is also used for: If the real-time liquid level reaches the preset overflow height of the collection tank, the control valve is opened to discharge the slurry in the collection tank; If the slurry in the collection tank is drained, the control valve is closed, and this process is repeated until it is determined that the overflow of the desulfurization absorption tower is normal.

3. The desulfurization absorption tower slurry overflow monitoring device as described in claim 1 or 2, characterized in that, The controller is also used for: If the real-time slurry overflow exceeds the preset flow threshold, the overflow of the desulfurization absorption tower is determined to be abnormal.

4. The desulfurization absorption tower slurry overflow monitoring device as described in claim 3, characterized in that, The controller is also used for: If an abnormal overflow is detected in the desulfurization absorption tower, a linkage signal is sent. The linkage signal is used to trigger the desulfurization absorption tower control system to lower the liquid level in the desulfurization absorption tower.

5. The desulfurization absorption tower slurry overflow monitoring device as described in claim 1, characterized in that, The liquid collection tank is equipped with a partition, which vertically divides the liquid collection tank into a buffer chamber and a measuring chamber that are interconnected at the bottom. The liquid level gauge, the first temperature sensor and the second temperature sensor are installed in the measuring chamber, and one end of the liquid collection overflow pipe is connected to the upper part of the measuring chamber.

6. A monitoring method for the desulfurization absorption tower slurry overflow monitoring device as described in any one of claims 1-5, characterized in that, include: The system acquires the first real-time temperature detected by the first temperature sensor, the second real-time temperature detected by the second temperature sensor, and the real-time liquid level detected by the level gauge. If the temperature difference between the first real-time temperature and the second real-time temperature exceeds a preset temperature difference threshold, the control valve is closed, and the rate of change of the real-time liquid level within a preset time period is calculated. The real-time slurry overflow rate of the desulfurization absorption tower overflow pipe is calculated based on the liquid level change rate and the preset cross-sectional area of ​​the liquid collection tank. The overflow rate of the desulfurization absorption tower is determined based on the real-time slurry overflow rate.

7. The monitoring method of the desulfurization absorption tower slurry overflow monitoring device as described in claim 6, characterized in that, The process of acquiring the first real-time temperature detected by the first temperature sensor, the second real-time temperature detected by the second temperature sensor, and the real-time liquid level detected by the level gauge further includes: If the real-time liquid level reaches the preset overflow height of the collection tank, the control valve is opened to discharge the slurry in the collection tank; If the slurry in the collection tank is drained, the control valve is closed, and this process is repeated until it is determined that the overflow of the desulfurization absorption tower is normal.

8. The monitoring method of the desulfurization absorption tower slurry overflow monitoring device as described in claim 6 or 7, characterized in that, The step of determining whether the desulfurization absorption tower has an abnormal overflow based on the real-time slurry overflow rate includes: If the real-time slurry overflow exceeds the preset flow threshold, the overflow of the desulfurization absorption tower is determined to be abnormal.

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