A pH meter measuring installation for a tower circulating desulfurization absorption tower

Abstract

The application discloses a tower-in-circulation desulfurization absorption tower pH meter measuring installation device, and relates to the technical field of desulfurization tower accessories, which comprises an installation pipe arranged on an absorption tower, wherein the installation pipe is arranged in an inclined upward mode with the tower wall of the absorption tower; a short pipe is inserted into the absorption tower through the installation pipe, and the outer end of the short pipe is connected with the port of the installation pipe; a core pipe is arranged in the short pipe; the outer end of the core pipe is connected with the outer end of the short pipe; the inner end of the short pipe is provided with an exposed port; a protective net is arranged on the exposed port; a pH meter is arranged at the inner end of the core pipe; a protective frame is arranged on the core pipe outside the pH meter; an end cover is connected with the outer end of the core pipe; and a wire harness penetrating sealing assembly is arranged on the end cover. Therefore, the existing problems in slurry pH measurement are solved, the continuous and accurate measurement of the pH value is realized, the service life of the pH meter is prolonged, the measurement cost is reduced, and the accuracy of slurry pH measurement in the absorption tower is improved.

Description

Technical Field

[0001] This application relates to the technical field of desulfurization tower accessories, and in particular to a pH meter measuring and installation device for an internal circulating desulfurization absorption tower. Background Technology

[0002] Wet limestone / gypsum desulfurization units are currently the most widely used flue gas desulfurization equipment in domestic thermal power plants. Their advantages include high desulfurization efficiency, stable operation, and high adaptability to various coal types. pH measurement of the slurry inside the absorption tower is a crucial step in the wet flue gas desulfurization process of thermal power plants, and its accuracy is paramount. Unstable slurry pH values ​​or unreasonable operating ranges can lead to a series of adverse effects such as scaling, corrosion, and poor gypsum quality.

[0003] The following are some common existing pH measurement methods for absorption towers: (1) Add a branch pipe to the outlet pipe of the gypsum discharge pump (or a separate pH pump) at the bottom of the absorption tower and introduce it into the absorption tower. Install two pH electrodes on the horizontal section of the branch pipe. Use the outlet pressure of the discharge pump to supply the slurry of the absorption tower to the pH measuring device. After the measurement is completed, send it back to the absorption tower. Only when the gypsum discharge pump is running can the accuracy of the real-time measurement of the slurry be guaranteed, but it wastes electricity and causes serious wear. (2) A separate pipeline is set up for external discharge. The slurry in the absorption tower flows continuously and is discharged into a storage tank. A pH electrode is installed on the storage tank to measure the slurry in the storage tank. After the measurement is completed, the slurry in the storage tank is discharged directly. (3) The pipe opening and valve are directly installed at the bottom of the desulfurization tower, but the insertion depth is shallow, which makes it easy to get blocked, and the slurry in the pipe opening does not flow, so the measurement is inaccurate.

[0004] However, in the aforementioned existing technologies, the discharge pump outlet pressure is high, and the slurry flow velocity is fast. Fine suspended matter and solid crystals in the slurry exert significant impact on the glass bulb measuring element of the pH electrode, easily causing electrode damage and shortening its service life. Furthermore, to ensure continuous, real-time pH measurement, the discharge pump needs to operate uninterruptedly, resulting in high energy consumption. Moreover, calibrating a single electrode requires shutting down the discharge pump, rendering both pH electrodes inoperable and preventing continuous monitoring of the slurry pH. Simultaneously, during normal operation of the desulfurization system, the pH value of the gypsum slurry needs to be manually compared daily using a portable pH meter. The temperature difference between the slurry sample taken from the discharge pump outlet pipe and the slurry inside the pipe can exceed 10 degrees Celsius, causing inherent and irreversible systematic errors in both manual comparison and automatic measurement.

[0005] Therefore, in order to achieve continuous pH measurement, reduce electrode damage, extend service life, reduce measurement costs, improve the accuracy of pH measurement of slurry in the absorption tower, and ensure high-efficiency desulfurization and stable operation of the desulfurization absorption tower, it is necessary to implement continuous pH measurement. Utility Model Content

[0006] To address the aforementioned problems, achieve continuous and accurate pH measurement, extend the service life of pH meters, reduce measurement costs, and improve the accuracy of pH measurement in the slurry within the absorption tower, this application provides a pH meter measurement and installation device for an internal circulating desulfurization absorption tower.

[0007] The technical solution provided in this application for a pH meter measurement and installation device for an internal circulation desulfurization absorption tower is as follows.

[0008] A pH meter measuring and installation device for an internal circulating desulfurization absorption tower is characterized by comprising: an installation pipe on the absorption tower, the installation pipe being inclined upwards to the tower wall of the absorption tower; a short pipe inserted into the absorption tower through the installation pipe, with the outer end of the short pipe connected to the port of the installation pipe; a core tube disposed inside the short pipe, the outer end of the core tube being connected to the outer end of the short pipe; an exposed opening at the inner end of the short pipe, with a protective mesh disposed on the exposed opening; a pH meter disposed at the inner end of the core tube, with a protective frame disposed on the core tube surrounding the pH meter; an end cap connected to the outer end of the core tube, with a through-cell sealing assembly for penetrating a wire harness disposed on the end cap.

[0009] By adopting the above technical solution, the installation tube facilitates the insertion and fixing of the short tube into the absorption tower. The exposed end allows the slurry to flow naturally into the short tube after insertion. The protective mesh filters out larger particles and reduces the slurry flow velocity, preventing fine suspended matter and solid crystals in the slurry from impacting the pH meter and causing damage, thus extending its service life. The pH meter is installed at the inner end of the core tube and is surrounded by a protective frame to effectively prevent damage during assembly and disassembly. The through-chamber sealing assembly ensures the core tube's airtightness while facilitating the penetration of the pH harness.

[0010] Optionally, a liquid level sensor is provided on the wall of the core tube at a height higher than that of the pH meter.

[0011] By adopting the above technical solution and setting up a liquid level sensor, the liquid level height of the absorption tower and the slurry entering the short pipe can be detected, avoiding the impact of low liquid level on pH meter measurement.

[0012] Optionally, an air nozzle is provided on the wall of the core tube.

[0013] By adopting the above technical solution, the air nozzle can be used to periodically or irregularly inflate the short pipe, thereby enabling backflushing and cleaning of the protective net. This facilitates cleaning, reduces the possibility of blockage, extends the service life of the protective net, prevents slurry from failing to flow properly into the short pipe, which could affect pH meter measurements, and improves measurement efficiency.

[0014] Optionally, the exposed opening includes an end exposed opening at the inner end of the short pipe and a plurality of circumferential exposed openings distributed along the circumference of the short pipe.

[0015] By adopting the above technical solution, the setting of the end exposed port and the circumferential exposed port facilitates the normal flow of slurry in the absorption tower into the short pipe.

[0016] Optionally, the protective net includes an end net and a net sleeve, the end net being disposed at the inner end of the short pipe, and the net sleeve being disposed on the circumferential exposed portion of the short pipe.

[0017] Optionally, the inner end of the core tube is provided with a mounting hole, and the pH meter is assembled in the mounting hole by a threaded connection.

[0018] By adopting the above technical solution, the threaded connection is simple and reliable, and facilitates the installation of the pH meter.

[0019] Optionally, the inner end of the core tube is provided with an installation step, and the protective frame is assembled on the installation step by a threaded connection. The protective frame is cylindrical.

[0020] By adopting the above technical solution, the protective frame is installed conveniently through threaded connection.

[0021] Optionally, the through-chamber sealing assembly includes an outer shell tube, a sealing tube, and a tightening tube. One end of the outer shell tube has an inner connecting hole, and the other end of the inner connecting hole has a tapered hole. The inner hole of the other end of the outer shell tube is narrowed. The end cap has a through hole. The other end of the outer shell tube is threadedly connected to the through hole. The sealing tube is disposed in the tapered hole. The tightening tube is threadedly engaged with the inner connecting hole to press the sealing tube.

[0022] By adopting the above technical solution, after sequentially installing the outer shell tube, sealing tube, and tightening tube on the wire harness or pipeline, the sealing tube is squeezed in the middle by tightening the tightening tube and the outer shell tube, which can achieve a good sealing effect and ensure the sealing of the core tube.

[0023] Optionally, a sealing gasket is provided between the tightening tube and the sealing tube, and the sealing tube is tapered.

[0024] By adopting the above technical solution, the sealing performance can be further improved by setting the sealing gasket. The sealing tube is conical, which is conducive to the sealing fit between the sealing tube and the outer shell tube. The sealing performance can be improved by tightening the tube.

[0025] Optionally, the outer end of the short tube is connected to the port of the mounting tube via a flange, the outer end of the core tube is connected to the outer end of the short tube via a flange, and the outer end of the core tube is connected to the end cap via a flange.

[0026] By adopting the above technical solution, the flange connection method is simple and reliable, and easy to assemble and disassemble.

[0027] In summary, this application includes at least the following beneficial effects: 1. This application utilizes an installation tube design to facilitate the insertion and installation of the short tube into the absorption tower. The exposed end allows the slurry to flow naturally into the short tube after insertion. The protective mesh filters out larger particles and reduces the slurry flow velocity, preventing fine suspended matter and solid crystals in the slurry from impacting the pH meter and causing damage, thus extending its service life. The pH meter is installed at the inner end of the core tube and is surrounded by a protective frame to effectively prevent damage during assembly and disassembly. The through-chamber sealing assembly ensures the core tube's airtightness while facilitating the penetration of the pH harness.

[0028] 2. The core tube of this application is equipped with a liquid level sensor at a height higher than that of the pH meter, which can detect the liquid level of the absorption tower and the slurry entering the short tube, thus avoiding the influence of the pH meter measurement on the liquid level being too low.

[0029] 3. The core tube of this application is equipped with an air nozzle on its wall, which can periodically or irregularly inflate the short tube with air, thereby backflushing and cleaning the protective net. This makes cleaning convenient, reduces the possibility of blockage of the protective net, extends the service life of the protective net, prevents the slurry from failing to flow into the short tube normally, affecting pH meter measurement, and improves measurement efficiency. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the installation of the device in this application on the absorption tower.

[0032] Figure 2 This is a schematic diagram of the pH meter measurement and installation device for an internal circulating desulfurization absorption tower.

[0033] Figure 3 This is a top view schematic diagram of a pH meter measuring and installation device for an internal circulating desulfurization absorption tower.

[0034] Figure 4 yes Figure 3 Schematic diagram of the structure in cross section AA along the middle section line.

[0035] Figure 5 yes Figure 3 A schematic diagram of the structure from another perspective, viewed along section line AA.

[0036] Figure 6 yes Figure 5 A magnified schematic diagram of part A in the middle.

[0037] Figure 7 This is a schematic diagram of the half-section structure of the core tube.

[0038] Figure 8 yes Figure 7 A magnified schematic diagram of part B in the middle section.

[0039] Explanation of reference numerals in the attached diagram: 1. Mounting tube; 2. Short tube; 3. Circumferential exposed opening; 4. End mesh; 5. Mesh sleeve; 6. Core tube; 7. pH meter; 8. Protective frame; 9. Liquid level sensor; 10. Air nozzle; 11. End cap; 12. Through hole; 13. Outer shell tube; 14. Tapered hole; 15. Sealing tube; 16. Sealing gasket; 17. Tightening tube; 18. Wiring harness. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] The following is in conjunction with the appendix Figures 1 to 8 This application will be described in further detail.

[0042] This application discloses a pH meter measurement and installation device for an internal circulation desulfurization absorption tower.

[0043] Reference Figures 1 to 8 A pH meter measuring and installation device for an internal circulating desulfurization absorption tower includes: an installation pipe 1, a short pipe 2, and a core pipe 6.

[0044] Installation pipe 1 is installed on the absorption tower, and is inclined upward at a 45-degree angle to the tower wall. A flange is installed at the port of installation pipe 1.

[0045] After the short pipe 2 passes through the installation pipe 1, it is inserted into the absorption tower. The outer end of the short pipe 2 is equipped with a flange. The outer end of the short pipe 2 is connected to the port of the installation pipe 1 through the flange and is tightened with bolts. The flange connection method is simple and reliable, and is easy to assemble and disassemble.

[0046] The inner end of the short pipe 2 is provided with an exposed opening, and a protective net is installed on the exposed opening.

[0047] The exposed ports include the end port at the inner end of the short pipe 2 and four circumferential exposed ports 3 distributed around the circumference of the short pipe 2. The end port and circumferential exposed ports 3 facilitate the normal flow of slurry from the absorption tower into the short pipe 2. The protective net includes an end net 4 and a net sleeve 5. The end net 4 is located at the inner end of the short pipe 2 and is fixedly connected to the inner end of the short pipe 2 by bolts or screws. The net sleeve 5 is fitted onto the circumferential exposed ports 3 on the short pipe 2. The protective net filters out larger particulate impurities and reduces the flow rate of the slurry into the short pipe 2, preventing fine suspended matter and solid crystals in the slurry from impacting the pH meter 7 during flow, thus avoiding damage and extending its service life.

[0048] The core tube 6 is inserted into the short tube 2. A flange is provided at the outer end of the core tube 6. The outer end of the core tube 6 is connected to the outer end of the short tube 2 through the flange. The flange connection is simple and reliable, and is easy to assemble and disassemble. The inner end of the core tube 6 is located at the circumferential exposed opening 3 of the short tube 2, which can be close to the inner end of the short tube 2 to ensure that the slurry can pass through the protective net and enter the short tube 2 normally, submerging the inner end of the core tube 6.

[0049] The inner end of the core tube 6 is provided with a mounting hole. The pH meter 7 is assembled into the mounting hole by a threaded connection. The threaded connection is simple and reliable, and facilitates the installation of the pH meter 7.

[0050] The short tube 2 and the core tube 6 are long enough to ensure that the slurry height is higher than that of the pH meter 7.

[0051] A protective frame 8 is provided on the core tube 6 around the pH meter 7. An installation step is provided at the inner end of the core tube 6. The protective frame 8 is assembled on the installation step by a threaded connection. The protective frame 8 is cylindrical and is easy to install by a threaded connection.

[0052] A liquid level sensor 9 is installed on the wall of the core tube 6 at a height higher than that of the pH meter 7. The liquid level sensor 9 can detect the liquid level of the absorption tower and the slurry entering the short tube 2, so as to avoid the liquid level being too low and affecting the measurement of the pH meter 7.

[0053] An air nozzle 10 is installed on the wall of the core tube 6. The air nozzle 10 can periodically or irregularly inflate the short tube 2, thereby backflushing and cleaning the protective net. This makes cleaning convenient, reduces the possibility of blockage of the protective net, extends the service life of the protective net, and prevents the slurry from failing to flow into the short tube 2, which would affect the pH meter 7 measurement and improve measurement efficiency.

[0054] An end cap 11 is connected to the outer end of the core tube 6 via a flange and is tightened by an internal hexagon screw. The end cap 11 is provided with a through-pack sealing assembly for passing through the wire harness 18.

[0055] The penetration sealing assembly includes an outer casing tube 13, a sealing tube 15, a tightening tube 17, and a sealing gasket 16.

[0056] One end of the outer casing tube 13 has an internal connecting hole, and the other end of the internal connecting hole has a tapered hole 14. The inner hole of the other end of the outer casing tube 13 is narrowed. A through hole 12 is provided on the end cap 11, and the other end of the outer casing tube 13 is threadedly connected to the through hole 12. The sealing tube 15 is tapered and is positioned within the tapered hole 14. A sealing gasket 16 is located between the tightening tube 17 and the sealing tube 15. The tightening tube 17 is threaded into the inner connecting hole to press the sealing tube 15 into place. After sequentially installing the outer casing tube 13, sealing tube 15, and tightening tube 17 onto the wiring harness 18 or pipeline, the tightening tube 17 and the outer casing tube 13 are tightened together, squeezing the sealing tube 15 in the middle, achieving a good sealing effect and ensuring the sealing performance within the core tube 6. The sealing gasket 16 further enhances the sealing performance. The tapered shape of the sealing tube 15 facilitates the sealing fit between the sealing tube 15 and the outer casing tube 13, and the compression by the tightening tube 17 further improves the sealing performance.

[0057] This application utilizes the installation tube 1 to facilitate the insertion and installation of the short tube 2 into the absorption tower. The exposed opening allows the slurry to flow naturally into the short tube 2 after insertion. The protective mesh filters out larger particles and reduces the slurry flow rate into the short tube 2, preventing fine suspended matter and solid crystals in the slurry from impacting the pH meter 7 and causing damage, thus extending its service life. The pH meter 7 is installed at the inner end of the core tube 6 and is surrounded by a protective frame 8 to effectively prevent damage during assembly and disassembly. The through-chamber sealing assembly ensures the sealing of the core tube 6 while facilitating the penetration of the pH wiring harness 18.

[0058] In the description of this utility model, it should be understood that the terms "outer end," "end," "inner end," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In the description of this utility model, unless otherwise specified and limited, it should be noted that the term "connection" should be interpreted broadly. For example, it can refer to a mechanical connection or an electrical connection, or the internal connection of two components. It can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0059] The above are merely preferred embodiments of the utility model and are not intended to limit the utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the utility model should be included within the protection scope of the utility model.

Claims

1. A pH meter measuring and installation device for an internal circulating desulfurization absorption tower, characterized in that, include: An installation pipe is installed on the absorption tower, which is inclined upwards to the tower wall. A short pipe is inserted into the absorption tower through the installation pipe, and the outer end of the short pipe is connected to the port of the installation pipe. A core tube is installed inside the short pipe, and the outer end of the core tube is connected to the outer end of the short pipe. An exposed opening is opened at the inner end of the short pipe, and a protective net is installed on the exposed opening. A pH meter is installed at the inner end of the core tube, and a protective frame is installed on the core tube surrounding the pH meter. An end cap is connected to the outer end of the core tube, and a through-compartment sealing assembly for the wire harness is installed on the end cap.

2. The pH meter measuring and installation device for an internal circulating desulfurization absorption tower according to claim 1, characterized in that, A liquid level sensor is installed on the wall of the core tube at a height higher than that of the pH meter.

3. The pH meter measuring and installation device for an internal circulating desulfurization absorption tower according to claim 1, characterized in that, The core tube wall is equipped with an air nozzle.

4. The pH meter measuring and installation device for an internal circulating desulfurization absorption tower according to claim 1, characterized in that, The exposed openings include the end exposed opening at the inner end of the short pipe and a number of circumferential exposed openings distributed along the circumference of the short pipe.

5. The pH meter measuring and installation device for an internal circulating desulfurization absorption tower according to claim 4, characterized in that, The protective netting includes an end net and a net sleeve. The end net is installed at the inner end of the short pipe, and the net sleeve is fitted onto the circumferential exposed portion of the short pipe.

6. The pH meter measuring and installation device for an internal circulating desulfurization absorption tower according to claim 1, characterized in that, The inner end of the core tube has a mounting hole, and the pH meter is assembled into the mounting hole by a threaded connection.

7. The pH meter measuring and installation device for an internal circulating desulfurization absorption tower according to claim 1, characterized in that, The inner end of the core tube is provided with an installation step, and the protective frame is assembled on the installation step by a threaded connection. The protective frame is cylindrical.

8. The pH meter measuring and installation device for an internal circulating desulfurization absorption tower according to claim 1, characterized in that, The through-chamber sealing assembly includes an outer shell tube, a sealing tube, and a tightening tube. One end of the outer shell tube has an inner connecting hole, and the other end of the inner connecting hole has a tapered hole. The inner hole of the other end of the outer shell tube is narrowed. The end cap has a through hole. The other end of the outer shell tube is threadedly connected to the through hole. The sealing tube is disposed in the tapered hole. The tightening tube is threadedly engaged with the inner connecting hole to press the sealing tube.

9. The pH meter measuring and installation device for an internal circulating desulfurization absorption tower according to claim 8, characterized in that, A sealing gasket is provided between the tightening tube and the sealing tube, and the sealing tube is tapered.

10. The pH meter measuring and installation device for an internal circulating desulfurization absorption tower according to claim 1, characterized in that, The outer end of the short tube is connected to the port of the mounting tube via a flange, the outer end of the core tube is connected to the outer end of the short tube via a flange, and the outer end of the core tube is connected to the end cap via a flange.

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