Gypsum dehydration belt filter cloth flushing nozzle unblocking device and method

Abstract

The application discloses a gypsum dehydration belt filter cloth flushing nozzle dredging device and method, which comprises a telescopic rod body, a moving chuck, a universal rotation joint, a dredging needle head assembly and an integrated near-field visualization guiding system; one end of the telescopic rod body is connected with a handle, and the other end is connected with the moving chuck; the end of the moving chuck is connected with the dredging needle head assembly through the universal rotation joint; the telescopic rod body is a nested multi-section rod body, is internally provided with a transmission connecting rod and is provided with a quick knob locking mechanism; the universal rotation joint is composed of a rotating ball, an angle locking knob and a universal wheel shell; the dredging needle head assembly is composed of a needle head locking knob, a needle tube and a telescopic tungsten needle head; and the integrated near-field visualization guiding system comprises a high-definition camera, an LED light supplementing lamp and a wireless transmission module. The device can quickly and effectively remove deep and stubborn blockages, significantly improves production efficiency, reduces maintenance cost and downtime.

Description

Technical Field

[0001] This invention belongs to the technical field of boiler flue gas desulfurization equipment maintenance, and relates to a device and method for unclogging the nozzles of gypsum dewatering belt filter cloths suitable for confined spaces. Background Technology

[0002] In limestone-gypsum wet desulfurization systems, the water flushing nozzles of the dewatering belt filter cloth play a crucial cleaning role. They continuously spray high-pressure water (≥0.3MPa) to remove residual gypsum from the filter cloth surface, ensuring the gypsum moisture content is ≤10%. Industrial water is typically used for flushing the dewatering belt filter cloth in desulfurization systems. However, due to the high hardness of industrial water and the carbon steel material of the filter cloth flushing water pipes, the nozzles are prone to clogging with scale and rust products from the pipes over extended periods, leading to reduced flushing efficiency and frequent nozzle blockage.

[0003] Traditional methods for unclogging filter cloth flushing nozzles involve stopping the machine and performing offline unclogging. Because the nozzles are located in a confined space below the conveyor belt (typically less than 30cm in height), maintenance personnel cannot directly access them. This requires disassembling the filter cloth flushing water pipes, disassembling the nozzles, and then manually unclogging them after acid soaking. Each nozzle unclogging operation interrupts the dewatering system for at least 4 hours, affecting the stable operation of the desulfurization system and causing significant economic losses.

[0004] Current nozzle unclogging technology has the following drawbacks: First, the unclogging rod has a fixed length, which cannot cover filter cloths of different lengths used for flushing pipes; second, the unclogging needle cannot be adjusted in length, making it unsuitable for nozzles of different depths; and third, it uses a rigid unclogging head, which cannot be adjusted at multiple angles and is difficult to align with concealed nozzles. Existing technology lacks precision, cannot achieve flexible adjustment of length, angle, and depth, and has poor unclogging performance.

[0005] Therefore, it is necessary to develop a portable handheld tool that can quickly unclog the nozzles of the dewatering belt filter cloth without stopping the machine, in order to solve the problems of limited operation in confined spaces and low unclogging efficiency. Summary of the Invention

[0006] To address the problems of low unclogging efficiency, difficult operation, easy damage to filter cloth / nozzle, and inability to deal with deep and stubborn blockages in existing technologies, this invention provides a device and method for unclogging the filter cloth and nozzle of a gypsum dehydration belt. This device enables rapid unclogging of the filter cloth nozzle of the dehydration belt without stopping the dehydration belt, and is simple and flexible to operate.

[0007] The present invention provides a gypsum dewatering belt filter cloth flushing nozzle unblocking device, including a telescopic rod, a movable clamp, a universal rotating joint, an unblocking needle assembly and an integrated near-field visualization guidance system; one end of the telescopic rod is connected to a handle and the other end is connected to the movable clamp, and the end of the movable clamp is connected to the unblocking needle assembly through the universal rotating joint. In the aforementioned device, the telescopic rod is a nested multi-section rod with an internal transmission link and a quick-release knob locking mechanism. It is made of lightweight, high-strength aerospace aluminum alloy, and its working length is freely adjustable.

[0008] Preferably, the adjustment range is 1.4-3.0m, and the telescopic pole can adapt to the working distance requirements of different wide-band gypsum dewatering belts, enhancing its accessibility and portability.

[0009] In the aforementioned device, the movable chuck is made of corrosion-resistant stainless steel, and a 1cm long, 0.5cm diameter external thread is welded to the end of the movable chuck for connection with the universal joint. The vertical movement range of the movable chuck is 0~10cm, and the horizontal adjustment is 0°~180°.

[0010] Preferably, the operation method of the movable chuck is as follows: pinch the handle at the head of the telescopic rod up and down, the built-in return spring of the handle drives the internal transmission link of the telescopic rod to move back and forth, and indirectly drives the movable chuck to complete the up and down lifting and horizontal rotation through the linkage transmission, thereby accurately controlling the movement of the unblocking needle assembly to the target nozzle position to achieve preliminary positioning.

[0011] In the above-mentioned device, the universal rotary joint consists of a rotating ball, an angle locking knob, and a universal wheel housing. The universal wheel housing has an internal thread with a length of 1 cm and a diameter of 0.5 cm on one side, which is connected to the moving chuck by the thread.

[0012] Preferably, the material is high-strength aerospace-grade aluminum alloy, and the casters support 360° adjustment in any direction. An angle locking knob is also included to ensure stability during unblocking. This allows the unblocking needle assembly to be aligned with the nozzle blockage point at any angle / position.

[0013] In the aforementioned device, the unblocking needle assembly consists of a needle locking knob, a needle tube, and a retractable tungsten gold needle, with an overall length of 8cm. The needle tube at the top of the assembly has an internal thread with a length of 0.5cm and a diameter of 0.5cm, which is detachably connected to the bottom of the universal rotating joint via the thread, facilitating component replacement and maintenance.

[0014] The operation method of the unblocking needle assembly is as follows: insert the telescopic tungsten gold needle into the needle tube, manually adjust the length of the needle extension, tighten the needle locking knob to fix it, and ensure that the extension length of the needle tube is stable. Then connect the unblocking needle assembly and the universal rotating joint through the thread.

[0015] Preferably, the needle adopts a manual push-pull telescopic structure with a telescopic adjustment range of 0-20mm.

[0016] The integrated near-field visualization guidance system includes: a high-definition camera, an LED fill light, and a wireless transmission module.

[0017] The high-definition camera has a resolution of ≥1080P and is fixed to the outer wall of the needle tube of the unblocking needle assembly with a detachable clamp. The fixed position can be freely adjusted along the needle tube axis, and the visualization operation distance is ≤50mm, which can clearly capture the internal blockage of the nozzle. The LED supplementary light is integrated with the camera and arranged around the camera. The illumination can be adjusted in multiple levels to solve the problem of insufficient light in confined spaces and ensure clear shooting. The wireless transmission module adopts a Wi-Fi / Bluetooth dual-mode transmission mode to wirelessly transmit the real-time images captured by the camera to a handheld display terminal. The display terminal can be a mobile phone or tablet display, which can realize precise location of the blockage point, full monitoring of the unblocking process, and real-time evaluation of the unblocking effect, completely avoiding equipment damage caused by blind operation.

[0018] The aforementioned gypsum dewatering belt filter cloth flushing nozzle unblocking device also includes a fixed support clamp. The fixed support clamp is a one-piece molded stainless steel structure, fixedly installed on the front end of the telescopic rod by fastening bolts, located below the movable clamp and arranged perpendicularly to the rod. During operation, the fixed support clamp can directly rest against and clamp the outer wall of the filter cloth flushing water pipe, forming a stable support point, distributing the force of hand operation, avoiding hand fatigue from prolonged work, and preventing the device from shaking or shifting during unblocking, thus improving operational stability. It eliminates the need for maintenance personnel to hold the rod suspended in the air throughout the operation, making it suitable for operation in confined spaces.

[0019] This invention provides a method for unclogging the nozzle of a gypsum dehydration belt filter cloth, comprising the following steps: (1) Preparation of filter cloth rinsing water: First, use pickling solution to rinse and unclog, reduce the time the filter cloth is in contact with pickling solution, and then use industrial water to clean and unclog; the rinsing pipes are connected to the ordinary process water tank and the pickling solution tank respectively; the pickling solution is prepared in advance in the pickling solution tank: 3wt%~5wt% dilute citric acid solution, add 0.3wt% hexamethylenetetramine corrosion inhibitor, stir evenly to form the pickling solution, and control the pH value of the pickling solution at 3-5 to improve the unclogging effect; (2) Preparation and rod adjustment before operation: Confirm that the desulfurization system dewatering belt is in normal operation, check that the flushing water pressure is greater than 0.2MPa, and visually observe that the nozzle is blocked and the atomization effect is poor. Hold the handle of the device and rotate the knob locking mechanism of the telescopic rod. Adjust the rod to the target length of 1.4-3.0m according to the working distance, and then tighten the knob locking mechanism to fix the rod length.

[0020] (3) Device support and fixation: The fixed support clamp at the front end of the telescopic rod is placed smoothly against and clamped on the outer wall of the filter cloth flushing water pipe in the area to be dredged. The support angle is adjusted to form a stable working support point and reduce the force on the hand.

[0021] (4) Visual preliminary positioning: The integrated near-field visualization guidance system is turned on, the LED supplement light is turned on automatically, the camera captures the image in real time and transmits it to the handheld display terminal, and the position of the clogged flushing nozzle under the belt is initially located through the display terminal image.

[0022] (5) Multi-dimensional angle adjustment and alignment: By squeezing the handle to control the moving clamp, adjust its vertical height and horizontal angle, then rotate the universal wheel of the universal joint to fine-tune the tilt angle of the unblocking needle assembly, and combine the display terminal image to accurately align the tungsten gold needle with the nozzle end.

[0023] (6) Needle length adaptation adjustment: Based on the nozzle blockage depth observed by the display terminal, manually push and pull the tungsten gold needle to adjust its extension length to match the blockage depth, and tighten the locking knob on the needle tube to fix the needle length.

[0024] (7) Precisely locate the blockage point: Confirm the relative position of the needle and the blockage point again through the display terminal, fine-tune the position of the device, and precisely attach the tip of the tungsten needle to the center of the nozzle blockage.

[0025] (8) Online unblocking operation: Hold the handle and apply even pressure, gently and slowly insert the tungsten needle into the blockage. By gently pushing and pulling the needle back and forth, break up and remove scale and plaster blockages. During the unblocking process, observe the display terminal screen in real time and adjust the angle of the moving clamp and the force applied according to the blockage situation to avoid damaging the nozzle due to excessive force. During the unblocking process, the flushing water pressure can exert a reverse force to flush out the blockage.

[0026] (9) Real-time verification of unblocking effect: After the unblocking operation is completed, slowly retract the tungsten needle and observe the unobstructedness inside the nozzle and the atomization effect of the nozzle through the camera. If there are still residual blockages, repeat steps (5) to (8) for secondary unblocking.

[0027] (10) Batch unblocking operation: After unblocking a single nozzle, loosen the fixed support clamp, retract the telescopic rod, and move the device to the next blocked nozzle until all nozzles are unblocked; (11) Observe the unblocking effect: observe the filter cloth flushing water pressure to return to the normal working pressure of 0.1-0.2MPa, and at the same time observe the atomization state of the water from the nozzle to confirm that the unblocking meets the standard.

[0028] (12) Filter cloth rinsing water tank water quality restoration: Open the filter cloth rinsing water tank water supply valve to replace the rinsing water. Wait until the rinsing water pH value returns to about 8.

[0029] The beneficial effects of this invention are: (1) The device has strong adaptability: it can cope with narrow spaces, multi-angle nozzles and deep blockages; (2) The device has precise unblocking capability: the telescopic rod is adjustable + visual + universal joint + needle length adjustment four-fold positioning, which can accurately unblock the blockage point; (3) The device is highly efficient and convenient: it can be operated by a single person; (4) The device is safe to operate: it avoids damage to the filter cloth or nozzle caused by blind operation; (5) This invention, through the deep synergy of multiple innovative technologies, is particularly suitable for the complex and variable clogging conditions of the gypsum dewatering belt flushing water system and the current situation of limited space and high difficulty in maintenance. It can quickly and effectively remove deep and stubborn blockages, significantly improve production efficiency, and reduce maintenance costs and downtime. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the gypsum dehydration belt filter cloth flushing nozzle unblocking device of the present invention; Figure 2 Schematic diagram of the unblocking needle assembly; Figure 3 This is a schematic diagram of a universal joint.

[0031] In the diagram: 1 is the handle, 2 is the telescopic rod, 3 is the movable clamp, 4 is the fixed support clamp, 5 is the universal rotating joint, 6 is the unblocking needle assembly, 7 is the external thread, 8 is the tungsten gold needle, 9 is the needle tube, 10 is the internal thread, 11 is the needle locking knob, 12 is the camera, 13 is the universal wheel housing, 14 is the angle locking knob, and 15 is the rotating ball. Detailed Implementation

[0032] The present invention will be further illustrated by the following embodiments, but is not limited to the following embodiments. Example 1

[0033] like Figures 1-3 As shown, the present invention provides a gypsum dehydration belt filter cloth flushing nozzle unblocking device, including a telescopic rod 2, a movable clamp 3, a universal rotating joint 5, an unblocking needle assembly 6 and an integrated near-field visualization guidance system; one end of the telescopic rod 2 is connected to the handle 1, and the other end is connected to the movable clamp 3, and the end of the movable clamp 3 is connected to the unblocking needle assembly 6 through the universal rotating joint 5. In the aforementioned device, the telescopic rod 2 is a nested multi-section rod with an internal transmission linkage and a quick-release knob locking mechanism. It is made of lightweight, high-strength aerospace-grade aluminum alloy, and its working length is freely adjustable. Preferably, the adjustment range is 1.4-3.0m. The telescopic rod can adapt to the working distance requirements of different wide-band gypsum dehydration belts, enhancing its accessibility and portability.

[0034] In the above-mentioned device, the movable chuck 3 is made of corrosion-resistant stainless steel. A 1cm long, 0.5cm diameter external thread 7 is welded to the end of the movable chuck 3 for connection with the universal rotary joint 5. The vertical movement range of the movable chuck 3 is 0~10cm, and its horizontal adjustment is 0°~180°.

[0035] Preferably, the operation method of the movable clamp is as follows: the handle 1 at the head of the telescopic rod is pinched up and down, and the return spring built into the handle 1 drives the internal transmission link of the telescopic rod to move back and forth. Through the linkage transmission, the movable clamp 3 is indirectly driven to complete the up and down lifting and horizontal rotation actions, thereby accurately controlling the unblocking needle assembly 6 to move to the target nozzle position and achieve preliminary positioning.

[0036] In the above device, the universal rotary joint 5 is composed of a rotating ball 15, an angle locking knob 14, and a universal wheel housing 13. The universal wheel housing 13 has an internal thread with a length of 1 cm and a diameter of 0.5 cm on one side, which is connected to the moving chuck 3 by the thread.

[0037] Preferably, the universal rotary joint 5 is made of high-strength aerospace aluminum alloy, and the universal wheel supports 360° adjustment in any direction. It is equipped with an angle locking knob to ensure stable posture during unblocking. The universal rotary joint 5 allows the unblocking needle assembly to be aligned with the nozzle blockage point at any angle / position.

[0038] In the aforementioned device, the unblocking needle assembly 6 consists of a needle locking knob 11, a needle tube 9, and a retractable tungsten gold needle 8, with an overall length of 8cm. The needle tube 9 at the top of the assembly has an internal thread 10 with a length of 0.5cm and a diameter of 0.5cm in the middle, which is detachably connected to the bottom end of the universal rotating joint 5 via a thread, facilitating component replacement and maintenance.

[0039] The operation method of the unblocking needle assembly 6 is as follows: insert the retractable tungsten gold needle 8 into the needle tube 9, manually adjust the length of the needle extension, tighten the needle locking knob 11 to fix it, and ensure that the needle extension length is stable. Then connect the unblocking needle assembly and the universal rotating joint through threads.

[0040] Preferably, tungsten gold needles 8 with different orifice diameters can be selected according to the size of the nozzle. The orifice diameter of the tungsten gold needles 8 is 1.6-3.2mm. The needles adopt a manual push-pull telescopic structure with a telescopic adjustment range of 0-20mm. The extension length can be precisely adjusted according to the nozzle blockage depth and the volume of the blockage, avoiding excessive insertion and damage to the inner wall of the nozzle.

[0041] The integrated near-field visualization guidance system used in this embodiment consists of a wireless waterproof and fog-proof high-definition camera 12, a high-brightness adjustable LED fill light, a wireless transmission module, and a handheld display terminal. The high-definition camera has a resolution of ≥1080P and is fixed to the outer wall of the guide needle tube of the unblocking needle assembly by a detachable clamp. The fixed position can be freely adjusted along the needle tube axis, and the visualization operation distance is ≤50mm, which can clearly capture the internal blockage of the nozzle. The LED fill light is integrated with the camera and arranged around the camera. The illumination can be adjusted in multiple levels to solve the problem of insufficient light in confined spaces and ensure clear images. The wireless transmission module adopts a Wi-Fi / Bluetooth dual-mode transmission mode to wirelessly transmit the real-time images captured by the camera to the handheld display terminal. The display terminal can be a mobile phone or a tablet display, which can realize precise location of the blockage point, full monitoring of the unblocking process, and real-time evaluation of the unblocking effect, completely avoiding equipment damage caused by blind operation.

[0042] The aforementioned gypsum dewatering belt filter cloth flushing nozzle unblocking device also includes a fixed support clamp. The fixed support clamp is a one-piece molded stainless steel structure, fixedly installed on the front end of the telescopic rod by fastening bolts, located below the movable clamp and arranged perpendicularly to the rod. During operation, the fixed support clamp can directly rest against and clamp the outer wall of the filter cloth flushing water pipe, forming a stable support point, distributing the force of hand operation, avoiding hand fatigue from prolonged work, and preventing the device from shaking or shifting during unblocking, thus improving operational stability. It eliminates the need for maintenance personnel to hold the rod suspended in the air throughout the operation, making it suitable for operation in confined spaces.

[0043] This invention provides a method for rinsing and unclogging nozzles of a gypsum dewatering belt filter cloth using the above-mentioned device, comprising the following steps: (1) Filter cloth rinsing water preparation: First, use pickling solution to rinse and unclog, reducing the time the filter cloth is in contact with pickling solution, and then use industrial water to unclog and clean; the rinsing pipes are connected to the ordinary process water tank and the pickling solution tank respectively; Specifically, in this embodiment, the pickling solution is prepared in advance in the pickling solution tank: first, a 5wt% dilute citric acid solution is prepared, and 0.3wt% hexamethylenetetramine corrosion inhibitor is added. The solution is stirred evenly to form the pickling solution, and the pH value of the pickling solution is controlled at 3-5.

[0044] There are 12 nozzles in a row to be cleaned. First, rinse the nozzles with the above-mentioned pickling solution. It takes 3-5 minutes to clean all 12 nozzles. Reduce the time the filter cloth is in contact with the acid solution when feeding. Then switch to ordinary process water to clean. Because the cleaning speed is fast and the time is short, the filter cloth is prevented from being corroded by acid.

[0045] (2) Preparation and rod adjustment before operation: Confirm that the desulfurization system dewatering belt is in normal operation, check that the flushing water pressure is greater than 0.2MPa, and visually observe that the nozzle is blocked and the atomization effect is poor. Hold the handle of the device and rotate the knob locking mechanism of the telescopic rod. Adjust the rod to the target length of 1.4-3.0m according to the working distance, and then tighten the knob locking mechanism to fix the rod length.

[0046] (3) Device support and fixation: The fixed support clamp at the front end of the telescopic rod is placed smoothly against and clamped on the outer wall of the filter cloth flushing water pipe in the area to be dredged. The support angle is adjusted to form a stable working support point and reduce the force on the hand.

[0047] (4) Visual preliminary positioning: The integrated near-field visualization guidance system is turned on, the LED fill light is lit, the camera captures the image in real time and transmits it to the handheld display terminal, and the position of the clogged flushing nozzle under the belt is initially located through the display terminal image.

[0048] (5) Multi-dimensional angle adjustment and alignment: By squeezing the handle to control the moving clamp, adjust its vertical height and horizontal angle, then rotate the universal wheel of the universal joint to fine-tune the tilt angle of the unblocking needle assembly, and combine the display terminal image to accurately align the tungsten gold needle with the nozzle end.

[0049] (6) Needle length adaptation adjustment: Based on the nozzle blockage depth observed by the display terminal, manually push and pull the tungsten gold needle to adjust its extension length to match the blockage depth, and tighten the locking knob on the needle tube to fix the needle length.

[0050] (7) Precisely locate the blockage point: Confirm the relative position of the needle and the blockage point again through the display terminal, fine-tune the position of the unblocking device of the present invention, and precisely attach the tip of the tungsten gold needle to the center position of the nozzle blockage.

[0051] (8) Online unblocking operation: Hold the handle and apply even pressure, gently and slowly insert the tungsten needle into the blockage. By gently pushing and pulling the needle back and forth, break up and remove scale and plaster blockages. During the unblocking process, observe the display terminal screen in real time and adjust the angle of the moving clamp and the force applied according to the blockage situation to avoid damaging the nozzle due to excessive force. During the unblocking process, the flushing water pressure can act in the opposite direction to flush out the blockage.

[0052] (9) Real-time verification of unblocking effect: After the unblocking operation is completed, slowly retract the tungsten needle and observe the unobstructedness inside the nozzle and the atomization effect of the nozzle through the camera. If there are still residual blockages, repeat steps (5) to (8) for secondary unblocking.

[0053] (10) Batch unblocking operation: After unblocking a single nozzle, loosen the fixed support clamp, retract the telescopic rod, and move the device to the next blocked nozzle until all nozzles are unblocked; (11) Observe the unblocking effect: observe the filter cloth flushing water pressure to return to the normal working pressure of 0.1-0.2MPa, and at the same time observe the atomization state of the water from the nozzle to confirm that the unblocking meets the standard.

[0054] (12) Filter cloth rinsing water tank water quality restoration: Open the filter cloth rinsing water tank water supply valve to replace the rinsing water, and wait for the rinsing water pH value to return to 8.

[0055] The unblocking effect of the unblocking device of the present invention is shown in the table below:

[0056] This invention employs a four-fold positioning system: adjustable telescopic rod, visual display, universal joint, and needle length adjustment, for precise unblocking of blockages. The device is highly efficient and convenient: it can be operated by a single person, increasing unblocking efficiency by over 90%. It also ensures operational safety: avoiding damage to the filter cloth or nozzle caused by blind operation, and reducing maintenance costs by over 80%. This significantly improves work efficiency.

Claims

1. A device for flushing and unclogging nozzles of gypsum dehydration belt filter cloth, characterized in that, The system includes a telescopic rod, a movable clamp, a universal joint, a drain needle assembly, and an integrated near-field visual guidance system. One end of the telescopic rod is connected to a handle, and the other end is connected to the movable clamp. The end of the movable clamp is connected to the drain needle assembly via the universal joint. The telescopic rod is a nested multi-section rod with an internal transmission linkage and a quick-release knob locking mechanism. The universal joint consists of a rotating ball, an angle locking knob, and a universal wheel housing. The drain needle assembly consists of a needle locking knob, a needle tube, and a telescopic tungsten gold needle. The integrated near-field visual guidance system includes a high-definition camera, an LED fill light, and a wireless transmission module.

2. The gypsum dehydration belt filter cloth flushing nozzle unblocking device according to claim 1, characterized in that, The adjustable range of the telescopic rod is 1.4-3.0m.

3. The gypsum dewatering belt filter cloth flushing nozzle unblocking device according to claim 1, characterized in that, The movable chuck has an external thread of 1cm in length and 0.5cm in diameter welded to its end for connection with the universal rotary joint; the movable chuck has a vertical range of 0~10cm and can be adjusted horizontally from 0° to 180°.

4. The gypsum dewatering belt filter cloth flushing nozzle unblocking device according to claim 1, characterized in that, The universal joint has an internal thread with a length of 1cm and a diameter of 0.5cm on one side of the universal wheel housing, which is connected to the moving chuck by the thread; the universal wheel supports 360° adjustment in any direction and is equipped with an angle locking knob to ensure stable posture during unblocking.

5. The gypsum dewatering belt filter cloth flushing nozzle unblocking device according to claim 1, characterized in that, The overall length of the unblocking needle assembly is 8cm. The middle part of the needle tube at the top of the unblocking needle assembly is provided with an internal thread with a length of 0.5cm and a diameter of 0.5cm. It is detachably connected to the bottom of the universal rotating joint through the thread, which facilitates component replacement and maintenance. The telescopic tungsten gold needle adopts a manual push-pull telescopic structure with a telescopic adjustment range of 0-20mm.

6. The gypsum dewatering belt filter cloth flushing nozzle unblocking device according to claim 1, characterized in that, The high-definition camera has a resolution of ≥1080P and is fixed to the outer wall of the needle tube of the unclogging needle assembly by a detachable clamp. The fixed position can be freely adjusted along the needle tube axis. The visualization operation distance is ≤50mm, and it can clearly capture the internal blockage of the nozzle. The LED supplementary light is integrated with the camera and arranged around the camera. The illumination can be adjusted in multiple levels. The wireless transmission module adopts a Wi-Fi / Bluetooth dual-mode transmission mode to wirelessly transmit real-time images captured by the camera to a handheld display terminal, which can be a mobile phone or a tablet display.

7. The gypsum dewatering belt filter cloth flushing nozzle unblocking device according to claim 1, characterized in that, It also includes a fixed support clamp, which adopts a one-piece stainless steel molded structure and is fixedly installed on the front end of the telescopic rod by fastening bolts. It is located below the movable clamp and arranged perpendicular to the rod. The fixed support clamp can directly rest against and clamp on the outer wall of the filter cloth flushing water pipe to provide support.

8. A method for unclogging the rinsing nozzle of a gypsum dehydration belt filter cloth, comprising the rinsing nozzle unclogging device for gypsum dehydration belt filter cloth as described in any one of claims 1 to 7, characterized in that... Includes the following steps: (1) Preparation of filter cloth rinsing water: First, use pickling solution to rinse and unclog, reduce the time the filter cloth is in contact with pickling solution, and then use industrial water to clean and unclog; the rinsing pipes are connected to the ordinary process water tank and the pickling solution tank respectively; the pickling solution is prepared in advance in the pickling solution tank: 3wt%~5wt% dilute citric acid solution, add 0.3wt% hexamethylenetetramine corrosion inhibitor, stir evenly to form the pickling solution, and control the pH value of the pickling solution at 3-5 to improve the unclogging effect; (2) Preparation and rod adjustment before operation: Confirm that the desulfurization system dewatering belt is in normal operation, check that the flushing water pressure is greater than 0.2MPa, and observe that the nozzle is blocked and the atomization effect is poor; hold the handle of the device, rotate the knob locking mechanism of the telescopic rod, adjust the rod to the target length of 1.4-3.0m according to the working distance, and then tighten the knob locking mechanism to fix the rod length; (3) Device support and fixation: The fixed support clamp at the front end of the telescopic rod is stably placed against and clamped on the outer wall of the filter cloth flushing water pipe in the area to be dredged, and the support angle is adjusted to form a stable working support point; (4) Visual preliminary positioning: The integrated near-field visual guidance system is turned on, the LED fill light is lit, the camera captures the image in real time and transmits it to the handheld display terminal, and the position of the clogged flushing nozzle under the belt is initially located through the display terminal image; (5) Multi-dimensional angle adjustment and alignment: By squeezing the handle to operate the chuck, adjust its vertical height and horizontal angle, then rotate the universal wheel of the universal joint to fine-tune the tilt angle of the unblocking needle assembly, and combine the display terminal image to accurately align the tungsten gold needle with the nozzle end. (6) Needle length adaptation adjustment: According to the nozzle blockage depth observed by the display terminal, manually push and pull the tungsten gold needle to adjust its extension length to match the blockage depth, and tighten the locking knob on the needle tube to fix the needle length; (7) Precisely locate the blockage point: Confirm the relative position of the needle and the blockage point again through the display terminal, and precisely attach the tip of the tungsten gold needle to the center of the nozzle blockage; (8) Online unblocking operation: Hold the handle and apply even force to gently and slowly insert the tungsten gold needle into the blockage. By gently pushing and pulling the needle back and forth, break up and remove scale and plaster blockage. (9) Real-time verification of unblocking effect: After the unblocking operation is completed, slowly retract the tungsten gold needle and observe the unobstructedness inside the nozzle and the atomization effect of the nozzle through the camera. If there are still residual blockages, repeat steps (5) to (8) for secondary unblocking. (10) Batch unblocking operation: After unblocking a single nozzle, loosen the fixed support clamp, retract the telescopic rod, and move the device to the next blocked nozzle until all nozzles are unblocked; (11) Observe the unblocking effect: Observe the filter cloth flushing water pressure to return to the normal working pressure of 0.1-0.2MPa, and at the same time observe the atomization state of the water from the nozzle to confirm that the unblocking meets the standard; (12) Filter cloth rinsing water tank water quality restoration: Open the filter cloth rinsing water tank water supply valve to replace the rinsing water, and wait for the rinsing water pH value to return to 8.

9. The method for unclogging the nozzle of the gypsum dehydration belt filter cloth flushing system according to claim 8, characterized in that, In step (5), the operation method of the moving chuck is as follows: pinch the handle at the head of the telescopic rod up and down, and the built-in return spring of the handle drives the internal transmission link of the telescopic rod to move back and forth. Through the linkage transmission, the moving chuck is indirectly driven to complete the up and down lifting and horizontal rotation actions, thereby accurately controlling the unblocking needle assembly to move to the target nozzle position and achieving preliminary positioning.

10. The method for unclogging the nozzle of the gypsum dehydration belt filter cloth according to claim 8, characterized in that, The operation method of step (6) is as follows: insert the telescopic tungsten gold needle into the needle tube, manually adjust the length of the needle extension, tighten the needle locking knob to ensure the needle tube extension length is stable, and then connect the unblocking needle assembly and the universal rotating joint through the thread.

Images