A multi-functional measuring device for density and PH value of desulfurization slurry

Abstract

The application discloses a kind of desulfurization slurry density, PH value multifunctional measuring device, including tank, the upper end of tank is provided with cover plate, the lower end of tank is provided with and its inside is communicated with feed nozzle, feed nozzle is located the one end in the outside of tank and is communicated with the bottom of absorption tower by first liquid inlet pipe, the one end of feed nozzle is located in the inside of tank and is communicated with the lower end of cloth distribution pipeline, the upper end of cloth distribution pipeline extends to the below of cover plate;The part of the side of tank is close to upper end is provided with overflow, the part of the side of tank is close to lower end is provided with sand outlet, the one side of middle part of tank is provided with PH meter interface, the other side of middle part of tank is provided with two differential pressure transmitter interfaces at intervals.The application is integrated with slurry PH value measurement, slurry density measurement, slurry sampling function, relative single-function unit type measuring device effectively saves equipment cost, and reduces operation and maintenance cost.

Description

Technical Field

[0001] This invention relates to the field of power plant desulfurization system testing, and in particular to a multifunctional measuring device for desulfurization slurry density and pH value. Background Technology

[0002] Density measurement is one of the key parameters for monitoring desulfurization slurry in desulfurization systems. If the density is too low, dehydration will be difficult; if the density is too high, system erosion will be accelerated, leading to equipment damage. The accuracy of density measurement is also reflected in the correct monitoring of the absorber tower level. Generally, the absorber tower level is calculated by dividing the pressure transmitter reading at the bottom of the absorber tower by the slurry density. Inaccurate density measurement results in false absorber tower levels, and operator errors can cause overflows, endangering the safety of the desulfurization system. Therefore, the accuracy of slurry density measurement is crucial for the safe and stable operation of the desulfurization system.

[0003] The pH value of the desulfurization slurry is a crucial parameter for reaction control. Its output, along with other signals such as boiler load, FGD inlet sulfur dioxide concentration, and fresh limestone slurry density, is used to determine the required flow rate of fresh desulfurization slurry to be delivered to the flue gas desulfurization absorption tower. A higher pH value improves desulfurization efficiency but hinders the oxidation of the gypsum slurry, leading to incomplete oxidation, increased residual limestone, and a direct decline in quality. Conversely, a lower pH value promotes oxidation, but desulfurization efficiency cannot be guaranteed.

[0004] Sampling and analysis of desulfurization slurry from the absorption tower is also an important part of the power plant's monitoring, testing, and diagnosis of the desulfurization system. The timeliness and accuracy of sampling directly affect the measurement results and the judgment of the system's operating status, and are also related to the safe, stable, and effective operation of the entire unit.

[0005] In summary, the density and pH value of the desulfurization slurry in the absorption tower are key control factors of the desulfurization system. The accuracy of their measurement affects the performance of the entire system, and their reliability affects the reliability of the entire system. At the same time, the correct and timely slurry sampling method is also related to the safe, stable and effective operation of the entire unit.

[0006] Current wet desulfurization technology primarily uses mass flow meters and pH meters installed on pipelines to measure slurry density and pH, respectively, for data monitoring of the desulfurization slurry. However, desulfurization gypsum slurry has a high solids content, and if it also carries a large amount of sand, imported density meters costing over 100,000 yuan will have their service life severely shortened due to corrosion and wear. Furthermore, monitoring pH and density requires separate devices for density and pH measurement, located in different parts of the plant, which is costly and inconvenient for operators to inspect. Therefore, a multi-functional device for measuring the density and pH of desulfurization slurry is needed. Summary of the Invention

[0007] The purpose of this invention is to provide a multifunctional measuring device for desulfurization slurry density and pH value, thereby solving the technical problems mentioned in the background section.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: This invention discloses a multifunctional measuring device for desulfurization slurry density and pH value, comprising a tank, a cover plate at the upper end of the tank, and a feed nozzle communicating with the interior of the tank at the lower end. One end of the feed nozzle located outside the tank is connected to the bottom of the absorption tower via a first inlet pipe, and the other end of the feed nozzle located inside the tank is connected to the lower end of a distribution pipe, the upper end of which extends below the cover plate. An overflow port is located on the side of the tank near the upper end, and a sand discharge port is located on the side of the tank near the lower end. A pH meter interface is located on one side of the middle of the tank, and a pH meter is installed on the pH meter interface. Two differential pressure transmitter interfaces are spaced apart on the other side of the middle of the tank, and a differential pressure transmitter is installed on each of the differential pressure transmitter interfaces.

[0009] Furthermore, the lower end of the feed nozzle is connected to the first liquid inlet pipe and the water supply pipe respectively via a three-way valve, and the inside of the tank is provided with a water spray pipe connected to the material distribution pipeline.

[0010] Furthermore, the upper end of the fabric pipeline is uniformly provided with multiple connecting pipes along the circumference, and the multiple connecting pipes are all connected to the bottom of the annular pipe located above the fabric pipeline; the inner circumferential wall of the annular pipe is uniformly provided with multiple inner connecting pipes along the circumference, and each inner connecting pipe is provided with multiple L-shaped distributed pipes connected to it at even intervals on both sides, and the multiple distributed pipes are arranged one-to-one with the multiple connecting pipes, with the end of each distributed pipe away from the inner connecting pipe facing downward; the outer circumferential wall of the annular pipe is uniformly provided with multiple outer connecting pipes along the circumference, and the outer connecting pipes are arranged one-to-one with the multiple inner connecting pipes; the water spray pipe is arc-shaped, and the end of each outer connecting pipe away from the annular pipe is connected to the middle of the inner side of a water spray pipe, and the outer side of each water spray pipe is provided with multiple water nozzles connected to its interior at even intervals; the annular pipe is provided with regulating valves at the positions between each inner connecting pipe and the corresponding outer connecting pipe.

[0011] Furthermore, each of the regulating valves includes a spherical valve body rotatably disposed inside the annular tube. The spherical valve body has a valve cavity with an L-shaped cross-section. The vertical part of the valve cavity is aligned with the vertical axis of the transfer tube, and the horizontal part of the valve cavity is aligned with the axis of the corresponding outer connecting tube and inner connecting tube. A micro motor for driving the rotation of the corresponding spherical valve body is fixedly disposed on the upper part of the annular tube, and a protective cover is fixedly disposed on the outside of each micro motor.

[0012] Furthermore, the fabric conduit includes a first rigid pipe whose lower end is connected to the upper end of the feed nozzle, the upper end of the first rigid pipe being connected to the lower end of a retractable corrugated pipe, the upper end of the corrugated pipe being connected to the lower end of a second rigid pipe, and the upper end of the second rigid pipe having a closed structure; the horizontal portions of a plurality of adapter pipes are respectively connected to the upper portions of the second rigid pipe; an annular counterweight is fixedly sleeved in the middle of the second rigid pipe, and an upgraded drive mechanism for driving the second rigid pipe to move up and down is provided between the cover plate and the upper end of the second rigid pipe.

[0013] Furthermore, the lifting drive mechanism includes two vertically arranged plates on the upper part of the cover plate, a winch roller is rotatably arranged between the two plates, and a first motor for driving the winch roller to rotate is arranged on the outer side of one of the plates. A winch cable is wound on the winch roller, and the free end of the winch cable passes through a through hole opened in the cover plate and is fixedly connected to a connecting ring fixedly arranged on the upper part of the second rigid tube.

[0014] Furthermore, a filter cylinder for filtering impurities in the desulfurization slurry is provided between the first inlet pipe and the absorption tower, and a power pump is provided in the middle of the first inlet pipe; the filter cylinder is connected to the absorption tower through a second inlet pipe, and an on / off valve is provided on the second inlet pipe.

[0015] Furthermore, a cylindrical filter screen is fixedly installed in the middle of the interior of the filter cylinder. The second liquid inlet pipe is connected to the filter cylinder at the top plate of the filter cylinder and inside the filter screen. The first liquid inlet pipe is connected to the filter cylinder at the peripheral wall of the filter cylinder and near the lower end of the filter cylinder. A slag discharge pipe connected to the interior of the filter cylinder is provided in the middle of the bottom of the filter cylinder, and a slag discharge valve is provided on the slag discharge pipe. A rotating shaft is rotatably installed inside the filter screen of the filter cylinder, and a second motor for driving the rotating shaft is fixedly installed on the top plate of the filter cylinder. Multiple connecting rod assemblies are fixedly installed at even intervals on one side of the rotating shaft. A mounting base is fixedly installed at the end of each connecting rod assembly away from the rotating shaft. Multiple scraper assemblies for scraping off impurities remaining on the peripheral wall of the filter screen are evenly arranged on the mounting base.

[0016] Furthermore, each of the connecting rod assemblies includes an inner connecting rod fixedly connected to the rotating shaft and an outer connecting rod that is sealed and slidably sleeved outside the inner connecting rod. An electric telescopic rod is fixedly installed inside the inner connecting rod. The telescopic end of the electric telescopic rod is fixedly connected to the inner side of the end of the outer connecting rod, and the outer side of the end of the outer connecting rod is fixedly connected to the corresponding mounting base.

[0017] Furthermore, each of the scraper assemblies includes a scraper seat connected to the mounting base and a scraper fixedly disposed on the side of the scraper seat away from the mounting base; each of the scraper seats has two slide rods symmetrically fixedly disposed on the side near the mounting base; the mounting base has a small-diameter hole and a large-diameter hole connected sequentially from the outside to the inside at positions corresponding to each slide rod; the slide rod slides in cooperation with the corresponding small-diameter hole and extends into the interior of the large-diameter hole at one end away from the scraper seat; a slide seat is fixedly disposed at the end of the slide rod located inside the large-diameter hole and slides in cooperation with the large-diameter hole; a spring is disposed between the slide seat and the inner end of the large-diameter hole.

[0018] Compared with the prior art, the beneficial technical effects of the present invention are as follows: This invention utilizes a separate tank outside the absorption tower for measuring the density and pH value of the desulfurization slurry. The low flow rate of the desulfurization slurry within the tank effectively reduces the downward pressure on the pH meter electrodes, decreasing wear on the differential pressure transmitter, extending the lifespan of the measuring instruments, and improving equipment reliability. This invention integrates slurry pH measurement, slurry density measurement, and slurry sampling functions, significantly reducing equipment costs and operating and maintenance costs compared to separate unit-type measuring devices. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the tank structure of the present invention; Figure 3 This is a schematic diagram of the filter cartridge structure of the present invention; Figure 4 This is a schematic diagram of the internal pipeline connections of the tank during the measurement process of this invention; Figure 5 This is a schematic diagram of the internal pipeline connections of the tank during the cleaning process of this invention; Figure 6 This is a top view of the internal piping of the tank / container of the present invention; Figure 7 This is a schematic diagram of the linkage assembly structure of the present invention; Figure 8 This is a schematic diagram of the scraper assembly structure of the present invention; Explanation of reference numerals in the attached drawings: 1. Tank; 2. Cover plate; 3. Feed nozzle; 4. First inlet pipe; 5. Overflow port; 6. Sand discharge port; 7. pH meter interface; 8. pH meter; 9. Differential pressure transmitter interface; 10. Differential pressure transmitter; 11. Three-way valve; 12. Water supply pipe; 13. Spray pipe; 14. Transfer pipe; 15. Ring pipe; 16. Internal connecting pipe; 17. Distributing pipe; 18. External connecting pipe; 19. Water outlet nozzle; 20. Spherical valve body; 21. Valve chamber; 22. Micro motor; 23. Protective cover; 24. First rigid pipe; 25. Corrugated pipe 26. Second rigid tube; 27. Annular counterweight; 28. Vertical plate; 29. ​​Winching roller; 30. First motor; 31. Winching cable; 32. Connecting ring; 33. Filter cylinder; 34. Power pump; 35. Second inlet pipe; 36. Filter screen; 37. Slag discharge pipe; 38. Slag discharge valve; 39. Rotating shaft; 40. Second motor; 41. Mounting base; 42. Inner connecting rod; 43. Outer connecting rod; 44. Electric telescopic rod; 45. Scraper seat; 46. Scraper; 47. Slide rod; 48. Small diameter hole; 49. Large diameter hole; 50. Slide seat; 51. Spring. Detailed Implementation

[0021] like Figures 1-8 As shown, a multifunctional measuring device for desulfurization slurry density and pH value includes a tank 1. The upper half of the tank 1 is a cylindrical structure, and the lower half is a conical structure. The upper end of the tank 1 is open and a cover plate 2 adapted to its opening is fixedly installed. The lower end of the tank 1 is fixedly installed with a feed nozzle 3 that communicates with its interior. One end of the feed nozzle 3 located outside the tank 1 is connected to the bottom of the absorption tower of the desulfurization system through a first liquid inlet pipe 4. The other end of the feed nozzle 3 located inside the tank 1 is connected to the lower end of a distribution pipe. The upper end of the distribution pipe extends to below the cover plate 2.

[0022] An overflow port 5 is connected to the upper part of the side of the tank 1, and a sand discharge port 6 is connected to the lower part of the side of the tank 1. A pH meter interface 7 is provided on one side of the middle of the tank 1, and a pH meter 8 is installed on the pH meter interface 7 to measure the pH value of the desulfurization slurry entering the tank 1. Two differential pressure transmitter interfaces 9 are provided at intervals on the other side of the middle of the tank 1, and a differential pressure transmitter 10 is installed on each of the differential pressure transmitter interfaces 9. The density of the desulfurization slurry is calculated by measuring the pressure difference between two points in the tank.

[0023] The measuring device disclosed in this invention can be mounted on a trench near the absorption tower or placed above a pit, allowing for flexible arrangement depending on local conditions. The tank is a pressureless container with a free liquid surface. Its power source is primarily the gravitational potential energy of the desulfurization slurry in the absorption tower. The desulfurization slurry is introduced from the bottom of the absorption tower pool into the feed nozzle and then sprayed out. Using the feed nozzle maintains slurry agitation, thus preventing the settling of solid particles in the desulfurization slurry. The desulfurization slurry sprayed from the feed nozzle is distributed from the top of the tank via a distribution pipe, reducing disturbance to the slurry outside the distribution pipe and preventing measurement distortion of the differential pressure transmitter due to the dynamic pressure of the slurry outside the distribution pipe. After flowing out of the distribution pipe, the desulfurization slurry is discharged through two paths: one from the bottom sand discharge port and the other from the top overflow port, which can be used for sampling the desulfurization slurry. Additionally, the desulfurization slurry discharged from the tank can flow into the pit and be pumped back to the absorption tower by the pit pump. This invention is adaptable to absorber tower liquid levels of 8-20 meters, and measures densities from 1000 kg / m³. 3 -1500kg / m 3 The pH value measurement range is 0-14, and the quality of the sampled liquid is consistent with that of the desulfurization slurry inside the absorption tower.

[0024] This invention utilizes a separate tank outside the absorption tower for measuring the density and pH value of the desulfurization slurry. The flow rate of the desulfurization slurry within the tank is less than 0.5 m / h, effectively reducing the downward pressure of the desulfurization slurry on the pH meter electrodes, decreasing wear on the differential pressure transmitter, extending the lifespan of the measuring instruments, and improving equipment reliability. The flow rate of the desulfurization slurry within the tank is controlled at 7 m³ / h. 3 With a speed of approximately / h, the system's power consumption is saved. This invention integrates the functions of slurry pH measurement, slurry density measurement, and slurry sampling, which effectively saves equipment costs and reduces operation and maintenance costs compared to unit-type measuring devices with separate functions.

[0025] In this invention, the lower end of the feed nozzle 3 is connected to the first liquid inlet pipe 4 and the water supply pipe 12 via a three-way valve 11. The three-way valve 11 is a two-inlet, one-outlet three-way valve. The water supply pipe 12 is connected to an external clean water source. The tank 1 is equipped with a spray pipe 13 connected to the material distribution pipeline. After use, the tank 1 will have residual desulfurization slurry adhering to its interior. Therefore, cleaning water is supplied to the interior of the tank 1 through the water supply pipe 12. The cleaning water is sprayed into the interior of the tank 1 through the spray pipe 13, thereby cleaning the residual slurry on the inner wall of the tank 1 and avoiding affecting the accuracy of subsequent measurements.

[0026] To ensure effective switching between slurry measurement and inner wall cleaning operations inside tank 1, in this embodiment, multiple connecting pipes 14 are evenly arranged circumferentially at the upper end of the material distribution pipe, each connecting pipe 14 being L-shaped. The horizontal portion of each connecting pipe 14 is connected to the upper end of the material distribution pipe, and the vertical portions of the multiple connecting pipes 14 are connected to the bottom of an annular pipe 15 located above the material distribution pipe. Multiple inner connecting pipes 16 are evenly arranged circumferentially on the inner circumferential wall of the annular pipe 15. Multiple L-shaped uniformly distributed pipes 17 are evenly spaced on both sides of each inner connecting pipe 16, and are connected to it. Each uniformly distributed pipe 17 corresponds one-to-one with each of the multiple connecting pipes 14, with the end of each uniformly distributed pipe facing downwards away from the inner connecting pipe. Multiple outer connecting pipes 18 are evenly arranged circumferentially on the outer circumferential wall of the annular pipe 15, and each outer connecting pipe 18 corresponds one-to-one with each of the multiple inner connecting pipes 16. The water spray pipe 13 is arc-shaped. The end of each external connecting pipe 18 away from the annular pipe 15 is connected to the middle of the inner side of one of the water spray pipes 13. Multiple water nozzles 19 connected to the inside are evenly spaced on the outer side of each water spray pipe 13.

[0027] The annular pipe 15 is equipped with regulating valves at the locations between each of the inner connecting pipes 16 and the corresponding outer connecting pipes 18. Specifically, each regulating valve includes a spherical valve body 20 that is rotatably and sealingly installed inside the annular pipe 15 and located between the corresponding inner connecting pipe 16 and outer connecting pipe 18. The spherical valve body 20 has an L-shaped valve cavity 21. The vertical part of the valve cavity 21 is aligned with the vertical axis of the adapter pipe 14, and the horizontal part of the valve cavity 21 is aligned with the axes of the corresponding outer connecting pipe 18 and inner connecting pipe 16. A micro motor 22 for driving the rotation of the corresponding spherical valve body 20 is fixedly installed on the upper part of the annular pipe 15, and a protective cover 23 is fixedly installed on the outside of each micro motor 22.

[0028] When tank 1 is in operation measuring the desulfurization slurry, the input end of the feed nozzle is connected to the first inlet pipe via a three-way valve. The desulfurization slurry enters the distribution pipeline through the first inlet pipe and the feed nozzle, and flows from the upper end of the feed pipeline to each transfer pipe. For example... Figure 4 As shown, at this time, the horizontal part of the valve cavity of the spherical valve body is connected to the inner connecting pipe on the annular pipe, so that the desulfurization slurry flowing out of each transfer pipe enters the inner connecting pipe through the corresponding spherical valve body, and is finally distributed in the upper part of the tank by the uniformly distributed pipes evenly arranged on both sides of each inner connecting pipe. The multiple sets of uniform pipes are evenly distributed along the circumference of the tank, just like the inner connecting pipes, thereby improving the uniformity of the desulfurization slurry distribution in the tank and further reducing disturbance.

[0029] When the desulfurization slurry measurement is completed and the inside of the tank needs to be flushed, the input end of the feed nozzle is connected to the water supply pipe via a three-way valve. The cleaning water enters the distribution pipeline through the water supply pipe and feed nozzle, and flows from the upper end of the feed pipeline to each transfer pipe. For example... Figure 5 As shown, the ball valve body is rotated 180° by a micro motor. At this time, the horizontal part of the valve cavity of the ball valve body is connected to the external connecting pipe on the annular pipe, so that the cleaning water flowing out of each transfer pipe enters the external connecting pipe through the corresponding ball valve body, and is finally sprayed out by the water nozzle on the spray pipe connected to each external connecting pipe to clean the residual slurry on the inner wall of the tank, so as to avoid affecting the accuracy of subsequent measurements.

[0030] In this example, the fabric pipeline includes a first rigid pipe 24 whose lower end is connected to the upper end of the feed nozzle 3. The upper end of the first rigid pipe 24 is connected to the lower end of a retractable corrugated pipe 25. The upper end of the corrugated pipe 25 is connected to the lower end of a second rigid pipe 26. The upper end of the second rigid pipe 26 is a closed structure. The horizontal portions of multiple adapter pipes 14 are respectively connected to the upper portions of the second rigid pipe 26. A ring-shaped counterweight 27 is fixedly fitted in the middle of the second rigid pipe 26. An upgraded drive mechanism for driving the second rigid pipe 26 to move up and down is provided between the cover plate 2 and the upper end of the second rigid pipe 26. By driving the second rigid pipe 26 to move up and down through the lifting drive mechanism, the height of each adapter pipe, the ring pipe, and each spray pipe can be adjusted, thereby achieving the washing of the inner wall of the tank at different locations.

[0031] Specifically, the lifting drive mechanism includes two vertically mounted plates 28 on the upper part of the cover plate 2. A winch roller 29 is rotatably mounted between the two plates 28, and a first motor 30 for driving the winch roller 29 to rotate is mounted on the outer side of one of the plates 28. A winch cable 31 is wound around the winch roller 29, and the free end of the winch cable 31 passes through a through hole in the cover plate 2 and is fixedly connected to a connecting ring 32 fixedly mounted on the upper part of the second rigid tube 26. When the first motor 30 drives the winch roller 29 to rotate, the rotating winch roller 29 winds up and unwinds the winch cable 31, and the winch cable 31 pulls the second rigid tube 26 to move, thereby adjusting the height of the connecting pipe at the upper end of the second rigid tube 26.

[0032] Since the desulfurization slurry may carry solid impurities such as anti-corrosion flakes and rubber lining that have fallen off from the absorption tower, in order to avoid clogging of the feed nozzle and the material distribution pipeline in the tank, in this embodiment, a filter cylinder 33 for filtering impurities in the desulfurization slurry is also provided between the first inlet pipe 4 and the absorption tower. A power pump 34 is installed in the middle of the first inlet pipe 4. The filter cylinder 33 is connected to the absorption tower through a second inlet pipe 35, and an on / off valve is installed on the second inlet pipe 35.

[0033] Specifically: A cylindrical filter screen 36 is fixedly installed in the middle of the interior of the filter cylinder 33. The second inlet pipe 35 is connected to the filter cylinder 33 at the top plate of the filter cylinder 33 and inside the filter screen 36. The first inlet pipe 4 is connected to the filter cylinder 33 at the peripheral wall of the filter cylinder 33 and near the lower end of the filter cylinder 33. After the desulfurization slurry enters the interior of the filter cylinder 33 through the second inlet pipe 35, the solid impurities in the desulfurization slurry are filtered through the filter screen 36. The filtered desulfurization slurry is then transported to the tank 1 through the first inlet pipe 4. A slag discharge pipe 37 connected to the interior of the filter cylinder 1 is installed in the middle of the bottom. A slag discharge valve 38 is provided on the slag discharge pipe 37, which can be opened periodically to discharge impurities in the filter cylinder 1 through the slag discharge pipe 37.

[0034] To prevent solid impurities from accumulating on the filter screen 36 and clogging it, thus affecting filtration efficiency, a rotating shaft 39 is rotatably mounted inside the filter screen 36 in the filter cylinder 33, and a second motor 40 for driving the rotating shaft 39 to rotate is fixedly mounted on the top plate of the filter cylinder 33. The rotating shaft 39 is aligned with the axis of the filter screen 36, and multiple connecting rod assemblies are fixedly arranged at even intervals on one side of the shaft 39. A mounting base 41 is fixedly mounted on the end of each connecting rod assembly away from the rotating shaft 39. Multiple scraper assemblies for scraping away impurities remaining on the peripheral wall of the filter screen are evenly arranged on the mounting base 41. The second motor 40 can be periodically turned on; when the second motor 40 drives the rotating shaft 39 to rotate, the scraper assemblies scrape away the solid impurities adhering to the filter screen 36.

[0035] like Figure 7As shown, each of the connecting rod assemblies includes an inner connecting rod 42 fixedly connected to the rotating shaft 39 and an outer connecting rod 43 sealed and slidably fitted outside the inner connecting rod 42. An electric telescopic rod 44, aligned with the axis of the inner connecting rod 42, is fixedly installed inside the inner connecting rod 42. The telescopic end of the electric telescopic rod 44 is fixedly connected to the inner side of the end of the outer connecting rod 43, and the outer side of the end of the outer connecting rod 43 is fixedly connected to the corresponding mounting base 41. When the scraper assembly on the mounting base is not in operation, the electric telescopic rod 44 is in a retracted state, preventing the scraper assembly from contacting the filter screen and ensuring the normal operation of the filter screen. When the scraper assembly needs to remove impurities from the filter screen, the electric telescopic rod extends, driving the scraper assembly on the mounting base 41 to approach the peripheral wall of the filter screen via the outer connecting rod to remove impurities.

[0036] like Figure 8 As shown, each scraper assembly in this embodiment includes a scraper seat 45 connected to the mounting base 41 and a scraper 46 fixedly installed on the side of the scraper seat 45 away from the mounting base 41. Two sliding rods 47 are symmetrically fixedly arranged on the side of each scraper seat 45 near the mounting base 41. The mounting base 41 has interconnected small-diameter holes 48 and large-diameter holes 49 at positions corresponding to each sliding rod 47, from the outside inwards. The sliding rod 47 slides with the corresponding small-diameter hole 48 and extends into the interior of the large-diameter hole 49 at one end away from the scraper seat 45. A sliding seat 50 is fixedly arranged at the end of the sliding rod 47 located inside the large-diameter hole 49, slidingly engaging with the large-diameter hole 49. A spring 51 is provided between the sliding seat 50 and the inner end of the large-diameter hole 49. Through the above arrangement, the scraper seat 45 can adaptively extend and retract relative to the mounting base 41, avoiding excessive rigid contact between the scraper 46 and the filter screen, thus preventing unnecessary damage to the filter screen.

[0037] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A multifunctional measuring device for desulfurization slurry density and pH value, characterized in that: The system includes a tank with a cover plate at its upper end and a feed nozzle at its lower end that communicates with the interior of the tank. One end of the feed nozzle located outside the tank is connected to the bottom of the absorption tower via a first inlet pipe, while the other end located inside the tank is connected to the lower end of a distribution pipe. The upper end of the distribution pipe extends below the cover plate. An overflow port is located on the side of the tank near the upper end, and a sand discharge port is located on the side of the tank near the lower end. A pH meter interface is located on one side of the middle of the tank, and a pH meter is installed on this interface. Two differential pressure transmitter interfaces are spaced apart on the other side of the middle of the tank, and a differential pressure transmitter is installed on each of these interfaces.

2. The multifunctional measuring device for desulfurization slurry density and pH value according to claim 1, characterized in that: The lower end of the feed nozzle is connected to the first liquid inlet pipe and the water supply pipe respectively through a three-way valve, and the inside of the tank is provided with a water spray pipe connected to the material distribution pipeline.

3. The multifunctional measuring device for desulfurization slurry density and pH value according to claim 2, characterized in that: The upper end of the fabric pipeline is uniformly provided with multiple connecting pipes along its circumference, and these connecting pipes are all connected to the bottom of an annular pipe located above the fabric pipeline. Multiple inner connecting pipes are uniformly provided along the circumference of the inner wall of the annular pipe, and multiple L-shaped distributed pipes are uniformly spaced on both sides of each inner connecting pipe, each connected to a corresponding connecting pipe, with the end of each distributed pipe facing downwards away from the inner connecting pipe. Multiple outer connecting pipes are uniformly provided along the circumference of the outer wall of the annular pipe, each corresponding to a corresponding inner connecting pipe. The water spray pipe is arc-shaped, and the end of each outer connecting pipe away from the annular pipe is connected to the middle of the inner side of a water spray pipe. Multiple water nozzles are uniformly spaced on the outer side of each water spray pipe, connected to its interior. A regulating valve is provided on the annular pipe between each inner connecting pipe and its corresponding outer connecting pipe.

4. The multifunctional measuring device for desulfurization slurry density and pH value according to claim 3, characterized in that: Each of the regulating valves includes a spherical valve body rotatably disposed inside the annular tube. The spherical valve body has an L-shaped valve cavity. The vertical part of the valve cavity is aligned with the vertical axis of the connecting pipe, and the horizontal part of the valve cavity is aligned with the axis of the corresponding outer connecting pipe and inner connecting pipe. A micro motor for driving the rotation of the corresponding spherical valve body is fixedly disposed on the upper part of the annular tube, and a protective cover is fixedly disposed on the outside of each micro motor.

5. The multifunctional measuring device for desulfurization slurry density and pH value according to claim 3, characterized in that: The fabric conduit includes a first rigid pipe whose lower end is connected to the upper end of the feed nozzle, the upper end of the first rigid pipe being connected to the lower end of a retractable corrugated pipe, the upper end of the corrugated pipe being connected to the lower end of a second rigid pipe, the upper end of the second rigid pipe being a closed structure; the horizontal portions of multiple adapter pipes are respectively connected to the upper portions of the second rigid pipe; an annular counterweight is fixedly sleeved in the middle of the second rigid pipe, and an upgrade drive mechanism for driving the second rigid pipe to move up and down is provided between the cover plate and the upper end of the second rigid pipe.

6. The multifunctional measuring device for desulfurization slurry density and pH value according to claim 5, characterized in that: The lifting drive mechanism includes two vertical plates arranged on the upper part of the cover plate, a winch roller is rotatably arranged between the two plates, and a first motor for driving the winch roller to rotate is arranged on the outer side of one of the plates. A winch cable is wound on the winch roller, and the free end of the winch cable passes through a through hole opened in the cover plate and is fixedly connected to a connecting ring fixedly arranged on the upper part of the second rigid tube.

7. The multifunctional measuring device for desulfurization slurry density and pH value according to claim 1, characterized in that: A filter cylinder for filtering impurities in the desulfurization slurry is installed between the first inlet pipe and the absorption tower. A power pump is installed in the middle of the first inlet pipe. The filter cylinder is connected to the absorption tower through a second inlet pipe, and an on / off valve is installed on the second inlet pipe.

8. The multifunctional measuring device for desulfurization slurry density and pH value according to claim 7, characterized in that: A cylindrical filter screen is fixedly installed in the middle of the interior of the filter cylinder. The second liquid inlet pipe is connected to the filter cylinder at the top plate of the filter cylinder and inside the filter screen. The first liquid inlet pipe is connected to the filter cylinder at the peripheral wall of the filter cylinder and near the lower end of the filter cylinder. A slag discharge pipe connected to the interior of the filter cylinder is provided in the middle of the bottom of the filter cylinder, and a slag discharge valve is provided on the slag discharge pipe. A rotating shaft is rotatably installed inside the filter screen of the filter cylinder, and a second motor for driving the rotating shaft is fixedly installed on the top plate of the filter cylinder. Multiple connecting rod assemblies are fixedly installed at even intervals on one side of the rotating shaft. A mounting base is fixedly installed at the end of each connecting rod assembly away from the rotating shaft. Multiple scraper assemblies for scraping off impurities remaining on the peripheral wall of the filter screen are evenly arranged on the mounting base.

9. The multifunctional measuring device for desulfurization slurry density and pH value according to claim 8, characterized in that: Each of the connecting rod assemblies includes an inner connecting rod fixedly connected to the rotating shaft and an outer connecting rod that is sealed and slidably sleeved outside the inner connecting rod. An electric telescopic rod is fixedly installed inside the inner connecting rod. The telescopic end of the electric telescopic rod is fixedly connected to the inner side of the end of the outer connecting rod, and the outer side of the end of the outer connecting rod is fixedly connected to the corresponding mounting base.

10. The multifunctional measuring device for desulfurization slurry density and pH value according to claim 8, characterized in that: Each scraper assembly includes a scraper seat connected to the mounting base and a scraper fixedly disposed on the side of the scraper seat away from the mounting base; each scraper seat has two slide rods symmetrically fixedly disposed on the side near the mounting base; the mounting base has a small-diameter hole and a large-diameter hole connected sequentially from the outside to the inside at positions corresponding to each slide rod; the slide rod slides in cooperation with the corresponding small-diameter hole and extends into the interior of the large-diameter hole at one end away from the scraper seat; a slide seat is fixedly disposed at the end of the slide rod located inside the large-diameter hole and slides in cooperation with the large-diameter hole; a spring is disposed between the slide seat and the inner end of the large-diameter hole.

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