Anti-blocking solid-gas-liquid medium pressure measurement sampling device

Abstract

The utility model relates to the technical field of pressure measurement, and discloses an anti-blocking solid-gas-liquid medium pressure measurement sampling device which comprises a sampling device used for pressure sampling, a purging device used for purging treatment and a compressed air pipe used for transporting compressed air. The sampling device comprises a sampling pipe which is obliquely and upwards arranged, the lower end of the sampling pipe is connected with the desulfurizing tower, a flange plate is arranged at the upper end of the sampling pipe, a pressure outlet pipe and a purging device are obliquely and upwards arranged on the flange plate, the purging device comprises a sampling purging pipe, and the lower end of the sampling purging pipe extends inwards and is connected with a disturbance pipe; the disturbance pipe is located between the demisting layer and the spraying layer, the length of the disturbance pipe extending into the tower is larger than the length of the sampling pipe purging pipe extending into the tower, and the upper end of the sampling purging pipe is communicated with a compressed air pipe. The utility model can solve the problems that the sampling device is easy to block, the pressure signal transmission is blocked and the measurement result is distorted in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of pressure measurement technology, specifically to a non-clogging solid-gas-liquid medium pressure measurement and sampling device. Background Technology

[0002] In wet flue gas desulfurization (FGD) systems in power plants, the demister is a key piece of equipment ensuring the efficient and stable operation of the system. When flue gas enters the FGD tower and comes into contact with the desulfurization slurry, it carries a large number of micron-sized droplets (such as gypsum particles and desulfurization slurry). The demister is typically located inside the FGD tower or at the outlet. It removes these droplets through mechanisms such as inertial impaction, interception, and centrifugal separation, preventing them from entering downstream equipment or the chimney, thus maintaining the normal operation of the downstream equipment or chimney. Accurately monitoring the pressure parameters before and after the demister is crucial for determining its operating status.

[0003] Currently, existing technologies typically use flange sampling devices connected to the desulfurization tower. Pressure sampling is performed at the desulfurization tower inlet to obtain pressure parameters before and after the demister (since the demister is generally located inside or at the outlet of the desulfurization tower, measuring the pressure parameters at the desulfurization tower inlet allows monitoring of the pressure parameters before and after the demister) to ensure the normal operation of the demister. The flange sampling device refers to pressure sampling via a separate pressure-sensing pipe connected to the desulfurization tower. However, this sampling method has the following problems: (1) Environmental factors: The environment where the demister is located is generally humid and prone to impurities, particulate matter, slurry, etc. (2) Prone to clogging: During sampling, solid-gas-liquid media (i.e., gas, impurities, particulate matter, slurry, etc.) easily enter the pressure-sensing pipe, causing blockage. Specifically, in the pressure sampling of the demister in a wet desulfurization system, gypsum particles in the desulfurization slurry, due to their small particle size and certain viscosity, easily accumulate in the pressure-sensing pipe. Initially, the impact of this buildup on fluid flow and pressure signals is not obvious. However, as time goes on, the buildup thickens and gradually forms large-area blockages and slurry films (slurry films are formed due to the continuous accumulation of desulfurization slurry), which seriously affects the transmission of pressure signals in the pressure tapping pipe and distorts the measurement results. Utility Model Content

[0004] The present invention aims to provide a non-clogging solid-gas-liquid medium pressure measurement and sampling device to solve the problems of easy clogging, obstructed pressure signal transmission, and distorted measurement results in the existing sampling devices.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a solid-gas-liquid medium pressure measurement and sampling device for preventing blockage: comprising a sampling device for pressure sampling, a purging device for purging treatment, and a compressed air pipe for transporting compressed air; the sampling device includes a sampling tube inclined upward, the lower end of the sampling tube being connected to the outlet of the desulfurization tower, the upper end of the sampling tube being provided with a flange, and a pressure outlet pipe and a purging device inclined upward on the flange; the purging device includes a sampling purging pipe, the lower end of the sampling purging pipe extending into the tower and connected to a disturbance pipe, the length of the disturbance pipe extending into the tower being longer than the length of the sampling purging pipe extending into the tower; the upper end of the sampling purging pipe is connected to the compressed air pipe.

[0006] The principle of this scheme is as follows: During the pressure sampling process, a pressure measurement sampling device will be used to collect gas samples and measure their pressure by relying on the height difference of the flue gas within the desulfurization tower. Specifically, the pressure measurement sampling device includes a purging device, a sampling device, and a compressed air pipe. In practical applications, the compressed air pipe is used to provide compressed air; the purging device includes a sampling purging pipe, which is used to deliver compressed air from the compressed air pipe to the sampling point of the desulfurization tower to remove gypsum particles, desulfurized slurry, and impurities from the solid-gas-liquid media (i.e., gas, gypsum particles, desulfurized slurry, and impurities). The sampling device includes a pressure outlet pipe, a sampling pipe, a disturbance pipe, and a flange, used to collect purified gas samples. Specifically, compressed air in the purging device flows through the sampling purging pipe to the sampling pipe, removing gypsum particles, desulfurization slurry, and impurities from the sampling purging pipe. Simultaneously, during the purging process, the blowing of compressed air and the flow velocity inside the desulfurization tower (the flow velocity inside the desulfurization tower refers to the natural flow generated by the height difference of the flue gas within the desulfurization tower) drive the agitation pipe to rotate. The agitation pipe's stirring action disturbs the solid-gas-liquid medium near the sampling pipe, sweeping off gypsum particles, desulfurization slurry, and impurities from the solid-gas-liquid medium. Under gravity, these particles fall to the spray layer and flow out with the desulfurization slurry within the desulfurization tower, thus solving the problem of easy clogging of the sampling device. The purified gas sample (i.e., the remaining gas after purging and agitation) flows from the sampling pipe to the pressure outlet pipe under the power of the flue gas height difference within the desulfurization tower, and then flows out from the pressure outlet pipe, thus completing the pressure sampling, facilitating accurate subsequent judgment of the demister's operating status.

[0007] The advantages of this scheme are: (1) This scheme breaks through the technical bias of "static sampling". This scheme solves the problems of easy clogging of sampling devices, obstruction of pressure signal transmission, and distortion of measurement results by the synergistic effect of "purging-disturbance-sampling".

[0008] (2) This solution employs a dual cleaning mechanism of "compressed air purging + mechanical disturbance". Compressed air purging: Compressed air purging effectively cleans gypsum particles, dewatering slurry, and impurities (collectively referred to as impurities) inside the pipe (e.g., inside the sampling purging pipe), preventing these impurities from accumulating inside the pipe. Mechanical disturbance: Combining compressed air purging and mechanical disturbance of the pipe's rotation removes the accumulation of gypsum particles, dewatering slurry, and impurities near the sampling pipe, further preventing blockage and also preventing the formation of a slurry film.

[0009] (3) The sampling tube, pressure outlet tube and purging device are all set at an upward angle, so that some of the impurities remaining in the tube will fall off naturally under the action of gravity, reducing the accumulation of impurities in the pipeline and further reducing the risk of blockage.

[0010] (4) "Separate sampling + synchronous operation": This solution realizes the separate flow and synchronous use of purging treatment and sampling treatment, avoids contamination between media, improves the purity of the sample, ensures the accuracy of pressure transmission, and thus improves the accuracy and reliability of measurement.

[0011] (5) The design of the disturbance tube is simple and it can rotate automatically during the compressed air purging process or the flow rate inside the desulfurization tower. No additional power source is required, which reduces energy consumption.

[0012] (6) The flange has a fixing function, which is used to fix the pressure outlet pipe and the purging device, to ensure the stability and reliability of each component, and to prevent loosening or displacement caused by vibration or other external forces.

[0013] Preferably, as an improvement, the distance between the lower end of the flange and the disturbance pipe is 15cm-25cm.

[0014] Beneficial effects: The position of the disturbance tube allows the compressed air blown out by the sampling purge tube to effectively cover the surface of the disturbance tube, thereby driving the disturbance tube to rotate under the action of airflow. In other words, the power of compressed air is fully utilized to achieve effective agitation of the surrounding medium.

[0015] Preferably, as an improvement, the length of the disturbance tube is 15cm-20cm; the disturbance tube is an inclined structure, the inclined structure includes a first disturbance tube parallel to the sampling purge tube and a second disturbance tube extending inclinedly from the upper end of the first disturbance tube, the first disturbance tube is used for rotational disturbance, the second disturbance tube is used between the first disturbance tube and the sampling purge tube, the inclination angle A between the first disturbance tube and the second disturbance tube is 110-130 degrees; the length of the first disturbance tube is 10cm-16cm.

[0016] Beneficial effects: (1) The inclined structure of the disturbance tube makes the disturbance range wider, covering more key areas, and can better agitate the surrounding medium, preventing impurities such as gypsum particles and desulfurization slurry from entering the sampling purge tube and pressure lead-out tube. (2) The length design of the disturbance tube (the design of the first disturbance tube and the second disturbance tube) avoids the poor disturbance effect caused by the disturbance tube being too short, and also prevents the wear problem caused by the disturbance tube being too long.

[0017] Preferably, as an improvement, the diameter of the sampling tube is 10cm-15cm; the inclination angle β between the sampling tube and the outer wall of the desulfurization tower is 50-65 degrees.

[0018] Beneficial effects: The tilt angle β effectively utilizes gravity, allowing gypsum particles, desulfurization slurry, and impurities to slide naturally within the sampling tube, reducing their accumulation and significantly lowering the risk of blockage, thus ensuring the continuity and accuracy of pressure signal transmission. The diameter design of the sampling tube provides space for the installation of the disturbance tube, avoiding both the problem of insufficient disturbance effect due to reduced compressed air flow velocity caused by an excessively large tube diameter, and the blockage problem caused by an excessively small tube diameter.

[0019] Preferably, as an improvement, the pressure lead-out tube is parallel to the sampling purge tube, the pressure lead-out tube is located below the sampling purge tube, and there is a gap between them.

[0020] Beneficial effects: The pressure outlet tube is located below the sampling purge tube, allowing the sampled gas, after being processed by the turbulence tube, to smoothly enter the pressure outlet tube. The parallel design of the pressure outlet tube and the sampling purge tube ensures that the airflow direction in both tubes is consistent, reducing turbulence interference; their spacing design ensures that they do not interfere with each other.

[0021] Preferably, as an improvement, the diameter of the sampling purge tube is 1cm-3cm; the diameter of the pressure lead-out tube is 1cm-3cm.

[0022] Beneficial effects: The diameter design of the sampling purge tube ensures the flow rate and purging intensity of compressed air, maximizing the purging effect with limited airflow. This effectively removes gypsum particles, desulfurization slurry, and other impurities, avoiding energy waste due to an excessively large diameter or clogging risks due to an excessively small diameter. The diameter design of the pressure outlet tube ensures the purity of the gas sample, avoiding both dilution of the gas sample due to the entry of outside air due to an excessively large diameter and clogging problems due to an excessively small diameter.

[0023] Preferably, as an improvement, the purging device further includes a backflush tube and a purging solenoid valve; the backflush tube is located between the sampling purging tube and the purging solenoid valve.

[0024] Beneficial effects: The purging solenoid valve can achieve precise control of the purging process, control the entry of compressed air to ensure that compressed air is provided for purging when needed, avoid unnecessary energy waste, and adjust the purging cycle according to the particulate matter content in the solid-gas-liquid medium, thereby improving the purging effect.

[0025] Preferably, as an improvement, the sampling purge tube and the backflush tube are inclined in a "7" shape, with the horizontal side being the backflush tube and the inclined side being the sampling purge tube, and the inclination angle α formed between the sampling purge tube and the backflush tube is 110-130 degrees.

[0026] Beneficial effects: The tilt angle α helps to distribute the compressed air entering from the backflush pipe more evenly, allowing the compressed air to flow smoothly along the tilted portion of the sampling purge pipe. This ensures effective purging of both the backflush pipe and the sampling purge pipe, and reduces pressure loss when the airflow changes direction, guaranteeing effective transmission and utilization of compressed air and improving purging efficiency. The tilted edge design also allows some impurities to fall off naturally under gravity, reducing impurity accumulation in the pipe and further reducing the risk of blockage.

[0027] Preferably, as an improvement, the diameter of the backflush tube is 1cm-3cm, and the backflush tube and the sampling purge tube are connected by a quick connector.

[0028] Beneficial effects: The diameter design of the backflush pipe ensures the flow rate and purging intensity of compressed air, maximizing the purging effect with limited airflow. This effectively removes gypsum particles, desulfurization slurry, and other impurities, avoiding energy waste due to excessive diameter or blockage risks due to insufficient diameter. The quick-connect design ensures a tight seal and durability between the backflush pipe and the sampling purging pipe, preventing leaks during purging and facilitating subsequent inspection and maintenance.

[0029] Preferably, as an improvement, the purge solenoid valve is connected to the compressed air pipe.

[0030] Beneficial effects: The purge solenoid valve is connected to the compressed air pipe, ensuring a stable and sufficient supply of compressed air when needed.

[0031] The beneficial effects of this scheme are: (1) The purging device and disturbance pipe in this scheme effectively remove gypsum particles, desulfurization slurry and other impurities, reduce the blockage of sampling pipe and pressure lead-out pipe, so that the pressure signal transmission is smooth and the measurement results are accurate.

[0032] (2) The design of tilt angles α and β in this scheme allows some of the impurities remaining in the pipe to fall off naturally under the action of gravity, reducing the accumulation of impurities in the pipe and thus further reducing the risk of blockage. The setting of tilt angle A allows the airflow around the sampling pipe to drive the disturbance pipe to move. Attached Figure Description

[0033] Figure 1 A schematic diagram of the structure of an anti-clogging solid-gas-liquid medium pressure measurement and sampling device provided in this embodiment of the utility model. Figure 1 .

[0034] Figure 2 This is a cross-sectional view of the sampling tube in a solid-gas-liquid medium pressure measurement and sampling device provided in an embodiment of the present invention.

[0035] Figure 3 A schematic diagram of the structure of an anti-clogging solid-gas-liquid medium pressure measurement and sampling device provided in this embodiment of the utility model. Figure 2 . Detailed Implementation

[0036] The following detailed description illustrates the specific implementation method:

[0037] The reference numerals in the accompanying drawings include: sampling tube 1, flange 2, sampling purge tube 31, backflush tube 32, purge solenoid valve 33, pressure lead-out tube 4, disturbance tube 5, first disturbance tube 51, second disturbance tube 52, compressed air tube 6, desulfurization tower 7, demister layer 71, and spray layer 72.

[0038] The technical solution adopted in this plan has been proposed after multiple tests and verifications. In the initial stage, the following two solutions were considered:

[0039] Option 1: Use an independent pressure tap for sampling.

[0040] An independent pressure tapping pipe with a diameter of 5 cm was directly connected to desulfurization tower 7 for pressure sampling before and after the demister. However, during the sampling process, solid-gas-liquid media (i.e., gases, impurities, particulate matter, slurry, etc.) easily entered the pressure tapping pipe, causing blockage. Specifically, gypsum particles and other substances in the desulfurization slurry, due to their small size and viscosity, easily accumulated in the pressure tapping pipe. Initially, this accumulation did not significantly interfere with fluid flow and pressure signals, but as time continued, the accumulation thickened, gradually forming large-area blockages and a slurry film (slurry film: formed due to the continuous accumulation of desulfurization slurry), severely affecting the pressure signal transmission within the pressure tapping pipe and distorting the measurement results.

[0041] Option 2: Low-pressure anti-clogging purging device

[0042] The micro-pressure anti-clogging purging device is an independent "Y"-shaped pipe, including a straight branch and a side branch. The straight branch is used to transport compressed air to purge the desulfurization tower 7, while the side branch is used for sampling. In this test, although it has purging and sampling functions, when purging and sampling are carried out in the same pipe and cannot be used simultaneously, the high adhesion of the desulfurization slurry still poses a risk of clogging, resulting in insufficient long-term reliability.

[0043] Based on the above test results, a non-clogging solid-gas-liquid medium pressure measurement and sampling device was proposed.

[0044] Example 1:

[0045] The implementation examples are basically as follows Figure 1 As shown: A solid-gas-liquid medium pressure measurement and sampling device for preventing blockage includes a sampling device for pressure sampling, a purging device for blowing compressed air for purging treatment, and a compressed air pipe 6 for transporting compressed air.

[0046] Specifically, the desulfurization tower includes a tower inlet, a demister layer, and a spray layer. The desulfurization tower has multiple inlets; in this embodiment, the inlet located between the demister layer and the spray layer is selected. This location provides the necessary conditions for subsequent impurity removal and gas sample collection.

[0047] A sampling device is installed at the tower opening, comprising a pressure outlet pipe 4, a sampling pipe 1, a disturbance pipe 5, and a flange 2. Specifically, the sampling pipe 1 is inclined upwards, with its lower end connected to the tower opening of the desulfurization tower 7. The inclination angle β between the sampling pipe 1 and the outer wall of the desulfurization tower 7 is 50-65 degrees, and the diameter of the sampling pipe 1 is 10cm-15cm. A flange 2 is installed at the upper end of the sampling pipe 1, with a distance of 40cm-60cm between the flange 2 and the tower opening. The pressure outlet pipe 4 and the purging device are inclined upwards on the flange 2, i.e., the pressure outlet pipe 4 and the purging device are installed on the sampling pipe 1 through the flange 2. The pressure outlet pipe 4 is located below the purging device, allowing the clean gas sample after purging to flow into the pressure outlet pipe 4.

[0048] In this embodiment, the inclination angle β between the sampling tube 1 and the outer wall of the desulfurization tower 7 is 60 degrees, allowing some impurities remaining in the tube to fall off naturally under gravity, reducing the accumulation of impurities in the pipeline and thus lowering the risk of blockage. The diameter of the sampling tube 1 is 10cm, ensuring sufficient flow area to reduce the possibility of blockage, while also providing space for the installation of the disturbance tube. This avoids the problem of poor disturbance effect due to reduced compressed air flow velocity caused by an excessively large pipe diameter, and also avoids the blockage problem caused by an excessively small pipe diameter. The length of the sampling tube 1 is determined according to the actual site conditions to ensure that it can cover the pressure measurement points before and after the demister. The lower end of the purging device extends inward and is connected to the disturbance tube 5. The function of the disturbance tube 5 is to disturb the medium at the outlet of the sampling tube 1 during the purging process, preventing particulate matter and slurry from accumulating at the sampling tube opening and avoiding blockage. The upper end of the purging device is connected to the compressed air pipe 6. The distance between the flange 2 and the tower opening is 50cm, ensuring installation strength while avoiding airflow disturbance from interfering with the measurement results.

[0049] The purging device includes a sampling purge pipe 31, a backflush pipe 32, and a purge solenoid valve 33. The sampling purge pipe 31 is inclined upwards, and its lower end extends into the tower and connects to a disturbance pipe 5, which is located between the demisting layer 71 and the spray layer 72. In this embodiment, the disturbance pipe 5 is added after the lower end of the sampling purge pipe 31 extends 20cm into the tower. Figure 2 As shown, the disturbance tube 5 has an inclined structure, comprising a first disturbance tube 51 parallel to the sampling purge tube 31 and a second disturbance tube 52 extending inclinedly from one end of the first disturbance tube 51. The first disturbance tube 51 and the second disturbance tube 52 are integrally connected. The first disturbance tube 51 is used for rotational disturbance, and the second disturbance tube 52 is used to connect the first disturbance tube 51 and the sampling purge tube 31. The inclination angle A between the first disturbance tube 51 and the second disturbance tube 52 is 110-130 degrees. The inclined structure design of the disturbance tube 5 allows for a wider disturbance range, covering more critical areas, and better agitating the surrounding medium, preventing impurities such as gypsum particles and desulfurization slurry from entering the sampling purge tube 31 and the pressure outlet tube 4. The total length of the disturbance tube 5 is 15cm-20cm, the length of the first disturbance tube 51 is 10cm-16cm, and the inclined length of the second disturbance tube 52 is 3cm-5cm. Specifically, in this embodiment, the total length of the disturbance tube 5 is 15cm, the length of the first disturbance tube 51 is 12cm, and the inclined length of the second disturbance tube 52 is 3cm. The length design of the disturbance tube 5 (i.e., the length design of the first disturbance tube 51) ensures that when the disturbance tube 5 is used, it avoids both poor disturbance effect due to an excessively short disturbance tube 5 and wear problems caused by an excessively long disturbance tube 5. The length design of the second disturbance tube 52 determines the range of disturbance, enabling it to cover more critical areas.

[0050] The upper end of the sampling purge pipe 31 is connected to one end of the backflush pipe 32, and the other end of the backflush pipe 32 is connected to one end of the purge solenoid valve 33. That is, the backflush pipe 32 is located between the sampling purge pipe 31 and the purge solenoid valve 33, which controls the start and stop of the purge. The sampling purge pipe 31 and the backflush pipe 32 are connected in an inclined "7" shape, meaning they are connected at an obtuse angle, forming an inclined "7" shape. The horizontal side is the backflush pipe 32, and the inclined side is the sampling purge pipe 31. The inclination angle α between the sampling purge pipe 31 and the backflush pipe 32 is 110-130 degrees. Furthermore, the sampling purge pipe 31 and the backflush pipe 32 are connected by a quick-connect snap-fit ​​joint. The quick-connect joint design ensures the sealing and durability between the backflush pipe 32 and the sampling purge pipe 31, preventing leakage during the purge process, and also facilitating subsequent inspection and maintenance. In this embodiment, the selection of the purge solenoid valve 33 needs to be adjusted according to the site environment to ensure that it can work stably in an environment with high humidity and high particulate matter content. At the same time, the purging cycle of the purge solenoid valve 33 is dynamically adjusted according to the particulate matter content in the solid-gas-liquid medium: the control system monitors the medium status in real time, and when the particulate matter concentration increases, the purging interval is automatically shortened; otherwise, the cycle is extended.

[0051] The other end of the purge solenoid valve 33 is connected to the compressed air pipe 6 to ensure a stable and sufficient supply of compressed air when needed.

[0052] In this embodiment, the diameters of the sampling purge pipe 31, the backflush pipe 32, and the pressure outlet pipe 4 are all 1cm-3cm. The pressure outlet pipe 4 is arranged in parallel radially below the sampling purge pipe 31, with a certain distance between them, ensuring that the pressure outlet pipe 4 and the sampling purge pipe 31 do not interfere with each other functionally, while also facilitating maintenance and operation. Specifically, the diameters of the sampling purge pipe 31, the backflush pipe 32, and the pressure outlet pipe 4 are all 1cm, and the sampling purge pipe 31 and the backflush pipe 32 are interconnected. The diameter design of the sampling purge pipe 31 and the backflush pipe 32 ensures the flow rate and purging intensity of the compressed air, maximizing the purging effect with a limited airflow, effectively removing gypsum particles, desulfurization slurry, and other impurities, and avoiding energy waste due to excessively large diameters or blockage risks due to excessively small diameters. The diameter design of the pressure outlet tube 4 ensures the purity of the gas sample, avoiding both dilution caused by excessively large diameters allowing outside air to enter and clogging caused by excessively small diameters. The lengths of the sampling purge tube 31, backflush tube 32, and pressure outlet tube 4 can be adjusted according to actual conditions to meet pressure measurement requirements.

[0053] The parallel design of the pressure outlet tube 4 and the sampling purge tube 31 ensures that the airflow direction in both tubes is consistent, reducing turbulence interference. The pressure outlet tube 4 is located below the sampling purge tube 31, allowing the sampled gas, after being processed by the disturbance tube 5, to smoothly enter the pressure outlet tube.

[0054] The specific implementation process is as follows:

[0055] Device installation location selection: Select a suitable installation location based on the structure of the demister and the site environment to ensure that the pressure measurement and sampling device can accurately measure the pressure before and after the demister.

[0056] Installation of the device: A pressure measurement and sampling device is connected to the left side of the desulfurization tower 7 at an upward angle. The sampling pipe 1 is connected to the desulfurization tower 7 at a 50-degree angle. The sampling pipe 1 extends 50cm outward and connects to the flange 2. A pressure outlet pipe 4 and a sampling purge pipe 31 are connected parallel to each other on the flange 2, with the pressure outlet pipe 4 located below the sampling purge pipe 31. A 15cm agitation pipe 5 is added 20cm inward from the lower end of the sampling purge pipe 31. The upper end of the sampling purge pipe 31 is connected to the backflush pipe 32. A purge solenoid valve 33 is installed on the backflush pipe 32, located between the backflush pipe 32 and the compressed air pipe 6. The compressed air pipe 6 is connected to an air supply device to continuously supply the required compressed air to the device. This air supply device is available from existing technology. Furthermore, the pressure outlet pipe 4 is externally connected to a measuring device (such as a pressure gauge) for real-time monitoring and recording of pressure parameters.

[0057] Device commissioning and testing: After installation, system commissioning is performed to ensure the sampling and purging devices function properly. Actual operational testing verifies the device's anti-clogging effectiveness and the accuracy of pressure measurements.

[0058] Operation of the device: Compressed air pipe 6 is connected to the air supply equipment to provide compressed air. This compressed air flows sequentially through the purge solenoid valve 33, the backflush pipe 32, and the sampling purge pipe 31 to the sampling pipe 1, blowing away residual gypsum particles, desulfurization slurry, and impurities in the backflush pipe 32 and the sampling purge pipe 31, and periodically purging the sampling pipe opening. Simultaneously, during the purging process, the blowing of compressed air and the flow velocity inside the desulfurization tower 7 drive the lower end of the agitation pipe 5 to rotate (i.e., drive the first agitation pipe 5 to rotate). The agitation pipe 5 acts as a stirrer, agitating the solid-gas-liquid medium near the sampling pipe 1, sweeping away gypsum particles, desulfurization slurry, and impurities in the solid-gas-liquid medium. Under gravity, these fall to the spray layer 72 and flow out with the desulfurization slurry in the desulfurization tower 7, thus solving the problem of easy clogging of the sampling device and obtaining clean gas samples. After purification, the gas sample flows upward from sampling pipe 1 to pressure outlet pipe 4 under the action of the height difference of flue gas in the desulfurization tower, and then flows out from pressure outlet pipe 4, thus completing the pressure sampling. Then, the pressure of the gas sample is measured by measuring equipment to obtain the corresponding pressure parameters, thereby accurately determining the operating status of the demister.

[0059] This solution overcomes the technical bias of "static sampling." Through the synergistic effect of "purging-disturbance-sampling," it solves the problems of easy clogging of sampling devices, obstructed pressure signal transmission, and distorted measurement results. This solution employs a dual cleaning mechanism of "compressed air purging + mechanical disturbance." Compressed air purging effectively removes gypsum particles, dewatering slurry, and impurities (collectively referred to as impurities) from the pipes (e.g., sampling tube 1 and sampling purging tube 31), preventing their accumulation. Mechanical disturbance, combined with compressed air purging and the rotation of the disturbance tube 5, removes the accumulation of gypsum particles, dewatering slurry, and impurities near sampling tube 1, further preventing clogging and the formation of a slurry film. This solution achieves separate and simultaneous use of purging and sampling processes, avoiding contamination between media, improving the purity of the sample, ensuring the accuracy of pressure transmission, and thus enhancing the precision and reliability of the measurement.

[0060] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A kind of anti-clogging solid-gas-liquid medium pressure measurement sampling device, for being connected with desulfurization tower to carry out pressure measurement;The desulfurization tower includes tower mouth, demisting layer and spraying layer, the tower mouth is between demisting layer and spraying layer, the solid-gas-liquid medium pressure measurement sampling device is connected with the tower mouth, it is characterized by: The system includes a sampling device for pressure sampling, a purging device for purging, and a compressed air pipe for transporting compressed air. The sampling device includes an upwardly inclined sampling tube, the lower end of which is connected to the inlet of the desulfurization tower. The upper end of the sampling tube is provided with a flange, on which a pressure outlet pipe and a purging device are inclined upwardly arranged. The purging device includes a sampling purging pipe, the lower end of which extends into the tower and is connected to a disturbance pipe. The length of the disturbance pipe extending into the tower is longer than the length of the sampling purging pipe extending into the tower. The upper end of the sampling purging pipe is connected to the compressed air pipe.

2. A clog resistant solid-gas-liquid medium pressure measurement sampling device according to claim 1, wherein: The distance between the lower end of the flange and the disturbance pipe is 15cm-25cm.

3. The anti-clogging solid-gas-liquid medium pressure measurement sampling device according to claim 1, characterized in that: The length of the disturbance tube is 15cm-20cm; the disturbance tube is an inclined structure, which includes a first disturbance tube parallel to the sampling purge tube and a second disturbance tube extending inclinedly from the upper end of the first disturbance tube. The first disturbance tube is used for rotational disturbance, and the second disturbance tube is used between the first disturbance tube and the sampling purge tube. The inclination angle A between the first disturbance tube and the second disturbance tube is 110-130 degrees; the length of the first disturbance tube is 10cm-16cm.

4. The anti-clogging solid-gas-liquid medium pressure measurement sampling device according to claim 1, characterized in that: The diameter of the sampling tube is 10cm-15cm; the inclination angle β between the sampling tube and the outer wall of the desulfurization tower is 50-65 degrees.

5. The anti-clogging solid-gas-liquid medium pressure measurement sampling device according to claim 1, characterized in that: The pressure lead-out tube is parallel to the sampling purge tube, and the pressure lead-out tube is located below the sampling purge tube with a gap between them.

6. The anti-clogging solid-gas-liquid medium pressure measurement and sampling device according to claim 1, characterized in that: The diameter of the sampling purge tube is 1cm-3cm; the diameter of the pressure lead-out tube is 1cm-3cm.

7. The anti-clogging solid-gas-liquid medium pressure measurement sampling device according to claim 1, characterized in that: The purging device further includes a backflush tube and a purging solenoid valve; the backflush tube is located between the sampling purging tube and the purging solenoid valve.

8. A clog resistant solid-gas-liquid medium pressure measurement sampling device according to claim 7, wherein: The sampling purge tube and the backflush tube are inclined in a "7" shape, with the horizontal side being the backflush tube and the inclined side being the sampling purge tube. The inclination angle α formed between the sampling purge tube and the backflush tube is 110-130 degrees.

9. A clog resistant solid-gas-liquid medium pressure measurement sampling device according to claim 7, wherein: The diameter of the backflush tube is 1cm-3cm, and the backflush tube and the sampling purge tube are connected by a quick connector.

10. A clog resistant solid-gas-liquid medium pressure measurement sampling device according to claim 7, wherein: The purge solenoid valve is connected to the compressed air pipe.

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