Device for measuring pH outside wet desulfurization tower
By installing a detection tank and cleaning mechanism outside the desulfurization tower, the problems of short lifespan and unstable measurement of pH measuring electrodes inside the wet desulfurization tower were solved, achieving accurate and stable pH measurement, reducing maintenance costs, and promoting the stable operation of the desulfurization system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING LONGYUAN WEIDE ENERGY TECH CO LTD
- Filing Date
- 2025-04-23
- Publication Date
- 2026-05-19
AI Technical Summary
Traditional wet desulfurization towers have short pH measurement electrodes with high maintenance costs and unstable measurement data, which affect desulfurization efficiency and system stability.
A detection tank is installed outside the desulfurization tower, with a pH meter probe and a cleaning mechanism to prevent the probe from directly contacting the high-flow-rate slurry. The cleaning mechanism prevents scaling and ensures measurement accuracy and stability.
It extends the service life of the pH meter probe, improves the reliability and stability of the measurement, reduces maintenance costs, and promotes the stable operation of the wet desulfurization process.
Smart Images
Figure CN224263175U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of flue gas desulfurization measurement equipment, and in particular to a pH measurement device for the external environment of a wet desulfurization tower. Background Technology
[0002] In wet desulfurization processes, accurately measuring the pH value of the slurry inside the desulfurization tower is crucial for ensuring desulfurization efficiency and stable system operation. Traditional pH measurements are mostly performed inside the desulfurization tower. However, the environment inside the tower is harsh, with high temperature, high humidity, highly corrosive gases, and violent slurry agitation. This not only rapidly erodes the sensitive membrane of the electrodes, leading to a short lifespan for pH measuring electrodes, and frequent electrode replacements increase maintenance costs and workload, but also causes instability in the liquid film on the electrode surface due to violent slurry agitation, interfering with the ion exchange process and causing significant fluctuations in measurement data, affecting the accuracy and stability of the measurements. Furthermore, the confined space inside the desulfurization tower makes electrode maintenance and repair difficult and risky due to limited operating space.
[0003] Therefore, developing a device that can accurately and stably measure the pH value of slurry outside the desulfurization tower is of great practical significance. Utility Model Content
[0004] The purpose of this invention is to provide a pH measuring device for external use in wet desulfurization towers, which can solve the above-mentioned technical problems and accurately and stably measure the pH value of the slurry.
[0005] This utility model provides an external pH measuring device for a wet desulfurization tower, including a detection tank. The detection tank is connected to the lower part of the desulfurization tower through an inlet pipe. A first valve is provided on the inlet pipe. A pH meter is provided inside the detection tank. A slag discharge pipe is provided at the bottom of the detection tank. A cleaning mechanism is provided inside the detection tank. The cleaning mechanism is connected to a water inlet pipe.
[0006] Preferably, the cleaning mechanism includes an annular tube disposed on the upper part of the detection tank, and a plurality of nozzles are evenly distributed below the annular tube, the nozzles being higher than the pH meter probe.
[0007] Preferably, the nozzle is a spiral nozzle.
[0008] Preferably, a second valve is provided on the inlet pipe between the first valve and the detection tank, and the inlet pipe between the first valve and the second valve is connected to process water through a flushing pipe, and a flushing water pump is provided on the flushing pipe.
[0009] Preferably, a third valve is provided on the flushing pipe between the flushing water pump and the inlet pipe.
[0010] Preferably, the first valve is a flow regulating valve, and the second valve and the third valve are both solenoid valves.
[0011] Preferably, the upper part of the detection tank is cylindrical and the bottom is conical. The center of the conical bottom is connected to the slag discharge pipe, and the slag discharge pipe is equipped with a fourth valve, which is a solenoid valve.
[0012] Preferably, the upper side of the testing tank is connected to an overflow pipe via an overflow port.
[0013] Preferably, the detection tank has a maximum liquid level line inside, and the overflow port is located at the maximum liquid level line.
[0014] Preferably, the pH meter is detachably connected to the top of the detection tank, and the pH meter is vertically positioned.
[0015] Beneficial effects:
[0016] This invention, by installing a testing tank outside the desulfurization tower and mounting the pH meter probe inside the tank, avoids direct contact between the probe and the high-flow-rate, high-solids-content slurry inside the desulfurization tower, effectively reducing erosion and wear, and extending the service life of the pH meter probe. A cleaning mechanism is also installed inside the tank to clean the pH meter probe and the inner wall of the testing tank, preventing surface scaling, ensuring measurement accuracy, and extending the service life of the equipment.
[0017] This invention has a simple structure, is easy to install and maintain, and can achieve automated operation through the control of valves in various pipelines. It improves the reliability and stability of pH meter measurement, which is beneficial to the stable operation and optimized control of wet desulfurization process. Attached Figure Description
[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0020] Explanation of reference numerals in the attached figures:
[0021] 1-Desulfurization tower, 2-Inlet pipe, 3-Detection tank, 4-First valve, 5-Second valve, 6-Flushing pipe, 7-Third valve, 8-Flushing water pump, 9-pH meter, 10-Ring pipe, 11-Nozzle, 12-Support, 13-Slag discharge pipe, 14-Fourth valve, 15-Slag collection device, 16-Water inlet pipe, 17-Fifth valve, 18-Cleaning water pump, 19-Overflow pipe. Detailed Implementation
[0022] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0025] Example 1
[0026] like Figure 1As shown, a pH measuring device for a wet desulfurization tower includes a detection tank 3. The upper part of the detection tank 3 is cylindrical and the bottom is conical. The middle part of the detection tank 3 is connected to the lower part of the desulfurization tower 1 through a liquid inlet pipe 2. A first valve 4 is provided on the liquid inlet pipe 2. The first valve 4 is a flow regulating valve, which can adjust the flow rate of the slurry entering the tank according to actual needs.
[0027] The upper side of the testing tank 3 is connected to the overflow pipe 19 via an overflow port. The testing tank 3 has a maximum liquid level line inside, and the overflow port is located at the maximum liquid level line. When the slurry in the testing tank 3 exceeds the maximum liquid level line, the excess slurry flows out through the overflow port and then flows into the drainage ditch through the overflow pipe 19.
[0028] The testing tank 3 is equipped with a pH meter 9. A mounting port is located on the top of the testing tank 3, allowing for detachable connection between the pH meter 9 and the mounting port for easy disassembly and maintenance. The pH meter 9 is vertically positioned. The pH meter probe is positioned below the maximum liquid level line to facilitate the detection of the slurry inside the testing tank 3. The pH meter 9 is electrically connected to a controller and a display screen. Both the controller and the display screen are located outside the testing tank 3. The display screen shows the pH meter 9's detection data, and the controller processes the detection data.
[0029] The testing tank 3 is equipped with a cleaning mechanism, which includes an annular pipe 10 located at the top of the testing tank 3. The annular pipe 10 is fixed to the inner wall of the testing tank 3 by a bracket 12. Several nozzles 11 are evenly distributed below the annular pipe 10, and the height of the nozzles 11 is higher than that of the pH meter probe. The nozzles 11 are spiral nozzles, vertically arranged, and spray cleaning water around them when in operation to clean the pH meter probe and the inner wall of the testing tank 3, preventing dirt and impurities from remaining on the surface of the testing tank 3 and the pH meter probe, thus ensuring measurement accuracy. Preferably, three or more nozzles 11 are provided, and their spray range can fully cover the inner wall of the testing tank 3 and the pH meter probe. One end of the annular pipe 10 is connected to a water inlet pipe 16, and the other end of the water inlet pipe 16 is connected to an external water source. A cleaning water pump 18 is installed on the water inlet pipe 16, and a fifth valve 17 is installed on the water inlet pipe 16 between the cleaning water pump 18 and the testing tank 3. The entire cleaning mechanism is located above the highest liquid level line to avoid corrosion by the slurry.
[0030] The center of the conical bottom of the testing tank 3 is connected to the slag discharge pipe 13, the slag discharge pipe 13 is equipped with a fourth valve 14, and the bottom of the slag discharge pipe 13 is connected to the slag collection device 15.
[0031] A second valve 5 is installed on the inlet pipe 2 between the first valve 4 and the testing tank 3. The inlet pipe 2 between the first valve 4 and the second valve 5 is connected to process water through a flushing pipe 6, which is equipped with a flushing water pump 8. A third valve 7 is installed on the flushing pipe 6 between the flushing water pump 8 and the inlet pipe 2. Process water can be delivered to the inlet pipe 2 and the testing tank 3 through the flushing pipe 6, preventing the inlet pipe 2 from being blocked by dirt and impurities; the flushing water pump 8 provides power for the process water; and the cleaning range within the inlet pipe 2 can be controlled by adjusting the opening and closing of the first valve 4 and the second valve 5.
[0032] The second valve 5, the third valve 7, the fourth valve 14, and the fifth valve 17 are all solenoid valves.
[0033] Work process:
[0034] When the first valve 4 is opened, the slurry with a high solids content at the bottom of the desulfurization tower 1 enters the testing tank 3 under pressure through the inlet pipe 2. Because the bottom of the testing tank 3 is conical, large solid particles in the slurry gradually settle at the bottom of the cone under gravity. The upper part of the tank is a clear liquid section with a lower solids content, reducing the impact of solid particles on the pH meter probe's measurement accuracy. The pH meter probe contacts the clear liquid section to measure the pH value of the slurry at this point. The pH meter 9 transmits the detection data to the controller and display screen.
[0035] When the slurry in the testing tank 3 exceeds the maximum liquid level, the excess slurry flows out through the overflow port and then flows into the drainage ditch through the overflow pipe 19, ensuring the normal operation of the testing tank 3 and preventing corrosion of the cleaning mechanism inside the tank.
[0036] After the test is completed, the fourth valve 14 is opened, and the slurry and deposited solid particles in the test tank 3 are discharged through the slag discharge pipe 13 to the slag collection device 15. Then the fifth valve 17 and the cleaning water pump 18 can be opened, and the nozzle 11 is used to flush the pH meter probe and the inner wall of the test tank 3. The flushing wastewater is discharged through the slag discharge pipe 13.
[0037] After a period of use, the inlet pipe 2 needs to be cleaned. At this time, the first valve 4 can be closed and the second valve 5 and the third valve 7 can be opened. The process water enters the inlet pipe 2 under the action of the flushing water pump 8, and flushes the inlet pipe 2 between the first valve 4 and the detection tank 3, as well as the inside of the detection tank 3. The flushing wastewater is discharged through the slag discharge pipe 13.
[0038] Example 2
[0039] A pH measuring device for an external wet desulfurization tower 1 has a structure that is basically the same as that in Example 1, except that the connection mechanism of the overflow pipe 19 is different.
[0040] A filter screen is installed at the overflow port. One end of the overflow pipe 19 is connected to the overflow port, and the other end is connected to the spray pipe inside the desulfurization tower 1. The slurry in the detection tank 3 can be returned to the desulfurization tower 1.
[0041] Example 3
[0042] An external pH measuring device for a wet desulfurization tower 1 has a structure basically the same as that in Example 1, except that a pressure balancing pipe is added to the top of the detection tank 3. One end of the pressure balancing pipe is connected to the inside of the detection tank 3, and the other end is open to the atmosphere. A one-way valve is installed on the pressure balancing pipe. When the pressure inside the tank increases due to factors such as liquid inflow or temperature changes, the one-way valve opens to release excess pressure, maintain the pressure inside the tank is stable, prevent abnormal pressure from affecting the measurement accuracy of the pH meter probe, and avoid problems such as tank deformation and leakage at the connection due to excessive pressure.
[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A pH measuring device for an external wet desulfurization tower, characterized in that, The device includes a testing tank, which is connected to the lower part of the desulfurization tower via an inlet pipe. The inlet pipe is equipped with a first valve. The testing tank contains a pH meter, a slag discharge pipe at the bottom, and a cleaning mechanism inside the testing tank, which is connected to a water inlet pipe.
2. The pH measuring device outside the wet desulfurization tower according to claim 1, characterized in that, The cleaning mechanism includes an annular tube disposed on the upper part of the detection tank, and a plurality of nozzles are evenly distributed below the annular tube, the nozzles being higher than the pH meter probe.
3. The pH measuring device outside the wet desulfurization tower according to claim 2, characterized in that, The nozzle is a spiral nozzle.
4. The pH measuring device outside the wet desulfurization tower according to claim 1, characterized in that, A second valve is provided on the inlet pipe between the first valve and the detection tank. The inlet pipe between the first valve and the second valve is connected to process water through a flushing pipe, and a flushing water pump is provided on the flushing pipe.
5. The pH measuring device outside the wet desulfurization tower according to claim 4, characterized in that, A third valve is provided on the flushing pipe between the flushing water pump and the inlet pipe.
6. The pH measuring device outside the wet desulfurization tower according to claim 5, characterized in that, The first valve is a flow regulating valve, and the second and third valves are both solenoid valves.
7. The pH measuring device outside the wet desulfurization tower according to claim 1, characterized in that, The upper part of the testing tank is cylindrical and the bottom is conical. The center of the conical bottom is connected to the slag discharge pipe. The slag discharge pipe is equipped with a fourth valve, which is a solenoid valve.
8. The pH measuring device outside the wet desulfurization tower according to claim 1, characterized in that, The upper side of the testing tank is connected to an overflow pipe via an overflow port.
9. The pH measuring device outside the wet desulfurization tower according to claim 8, characterized in that, The testing tank has a maximum liquid level line inside, and the overflow port is located at the maximum liquid level line.
10. The pH measuring device outside the wet desulfurization tower according to claim 1, characterized in that, The pH meter is detachably connected to the top of the detection tank, and the pH meter is set vertically.