Single-tower double-circulation desulfurization system pH measuring device
By using an inclined pH meter probe and flow cell design in a single tower dual circulation desulfurization system, combined with the connection between the three-way pipeline and the flushing suction pipe, the problems of inconvenient installation and low detection accuracy are solved, and high-precision pH measurement and long-life operation of the equipment are achieved.
Patent Information
- Application Number
- CN202422419795.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-09-30
AI Technical Summary
The pH measuring device of the existing single tower dual circulation desulfurization system is inconvenient to install and maintain, and the pH meter probe is susceptible to slurry erosion, resulting in low detection accuracy.
The pH meter probe and flow cell design with an inclined setting is designed, combined with the connection between the three-way pipe and the flushing suction pipe, to achieve flexible flushing and control, ensure the clean measurement environment, and facilitate installation and maintenance through a modular design.
It improves the accuracy of pH measurement and the service life of the equipment, reduces measurement errors and equipment corrosion, and ensures stable operation of the system.
Smart Images
Figure CN223244527U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of environmental protection engineering, relates to a desulfurization treatment system, and in particular to a pH measuring device for a single-tower double-circulation desulfurization system. Background Art
[0002] The single-tower dual-circulation desulfurization system has two independent circulation loops, the absorption tower circulation and the AFT tower circulation, also known as the absorption tower external slurry pool circulation, which together achieve efficient flue gas desulfurization. In each circulation loop, the pH value of the slurry is a key factor affecting the desulfurization efficiency and product quality. Therefore, it is necessary to design and install a pH measuring device for real-time monitoring of the acidity and alkalinity of the slurry. In the prior art, the pH measuring device uses a large barrel-shaped circulation pool, which makes installation and maintenance inconvenient, and the fixed position of the pH meter probe will cause the slurry to enter without buffering and directly flush the pH meter probe, affecting the detection accuracy and resulting in inaccurate measurements. Summary of the Invention
[0003] The purpose of the utility model is to solve the above problems and provide a pH measuring device for a single-tower double-circulation desulfurization system, which can ensure detection accuracy.
[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: A pH measuring device for a single-tower double-circulation desulfurization system, characterized in that it includes an AFT tower and an absorption tower, the AFT tower and the absorption tower are respectively connected to the ditch through a first slurry discharge pipeline and a second slurry discharge pipeline, the first slurry discharge pipeline is provided with a first circulation pool, the first slurry discharge pipeline between the first circulation pool and the AFT tower is connected to the first flushing and suction pipe through a three-way pipe one, the second slurry discharge pipeline is provided with a second circulation pool, the second slurry discharge pipeline between the second circulation pool and the absorption tower is connected to the second flushing and suction pipe through a three-way pipe two, and at least one inclined pH meter probe is provided on the first circulation pool and the second circulation pool.
[0005] The pH meter probes are installed at an angle on the first and second flow cells, respectively, to accurately measure the pH value of the desulfurization slurry in the AFT tower and the absorption tower. The design of the three-way pipe connected to the flushing and suction pipe allows for flexible flushing of the flow cells to maintain a clean measurement environment, reduce the impact of impurities on the pH meter probes, and improve measurement accuracy.
[0006] In the above-mentioned pH measuring device for the single-tower dual-circulation desulfurization system, a first slurry discharge gate is provided between the three-way pipe 1 and the AFT tower, and a first flushing water gate is provided between the three-way pipe 1 and the first flushing and suction water pipe; a second slurry discharge gate is provided between the three-way pipe 2 and the absorption tower, and a second flushing water gate is provided between the three-way pipe 2 and the second flushing and suction water pipe. The separate provision of the slurry discharge gate and the flushing water gate allows for flexible control of the slurry flow and flushing process. When the pH value of the slurry needs to be measured, the flushing water gate is closed and the slurry discharge gate is opened to allow the slurry to flow through the pH meter probe in the circulation pool; when the circulation pool or the pH meter probe needs to be cleaned, the slurry discharge gate is closed and the flushing water gate is opened, and the circulation pool is cleaned with flushing water, thereby maintaining the cleanliness and accuracy of the measurement environment. At the same time, the slurry can be prevented from flowing into the circulation pool when measurement or cleaning is not required, thereby reducing impact and damage to the equipment, protecting the pH meter probe from corrosion and wear, and extending its service life.
[0007] In the aforementioned single-tower dual-circulation desulfurization system pH measurement device, the first and second circulation cells comprise a cylindrical container body, each having an inlet and an outlet at the upper and lower ends, respectively. The inlet and outlet calibers are both smaller than the inner diameter of the container body. At least one inclined pH meter probe mounting hole is provided through the side wall of the container body, and the pH meter probe is sealed and fixed within the pH meter probe mounting hole. The angle α formed between the central axis of the pH meter probe and the central axis of the inlet is 45 degrees. The pH meter probe is connected to the pH meter probe mounting hole via a threaded structure, and a sealing ring is provided between the pH meter probe mounting hole and the pH meter probe. The cylindrical design of the container body makes it easier to place the container body in the designated position during installation. It also makes it easier to disassemble and inspect the equipment during replacement or maintenance. Furthermore, the smaller size results in a smaller capacity, which also helps increase the measurement frequency. The diameters of the inlet and outlet are both smaller than the inner diameter of the container body. This design helps to form a stable flow field inside the container, so that the slurry is more evenly distributed inside the container. Combined with the tilted pH meter probe, measurement errors can be reduced.
[0008] In the aforementioned single-tower dual-circulation desulfurization system pH measurement device, two pH meter probes are located axially along the vessel body. When the measurement results from the two probes are similar, the accuracy of the pH value can be further confirmed; if there is a discrepancy, it may indicate slurry stratification or uneven mixing, requiring appropriate adjustment measures. The dual-probe design also provides redundant backup. If one probe fails or measures inaccurately, the other probe will continue to operate, ensuring the system can continuously and stably monitor the slurry pH.
[0009] In the aforementioned pH measurement device for a single-tower, dual-circulation desulfurization system, the central axes of the inlet and outlet are aligned with the central axis of the container body, and the inner end of the pH meter probe is aligned with the central axis of the container body. This alignment of the inlet and outlet with the central axis of the container body helps maintain stable slurry flow within the container and reduces interference with pH measurement caused by uneven flow rates or eddy currents. The inner end of the pH meter probe is close to the central axis of the container body, and the pH value measured by the probe at this position is more representative, allowing the probe to more accurately reflect the overall pH value of the slurry within the container.
[0010] In the aforementioned single-tower dual-circulation desulfurization system pH measurement device, flanges for pipe connection are provided at both the inlet and outlet. These flange connections, using sealing materials such as gaskets or sealants, create a reliable seal at the joints, preventing leakage during slurry flow. Furthermore, appropriate piping and connectors can be easily selected based on actual needs, enhancing the system's adaptability and flexibility.
[0011] In the aforementioned single-tower dual-circulation desulfurization system pH measurement device, the inlet, outlet, and inner wall of the container body are all provided with an anti-corrosion coating. The slurry in the desulfurization system often contains corrosive substances such as sulfur dioxide and chlorides, which can cause corrosion to the equipment over time. The presence of the anti-corrosion coating effectively isolates these corrosive substances from direct contact with the equipment body, thereby slowing the corrosion rate and extending the equipment's service life.
[0012] In the aforementioned single-tower dual-circulation desulfurization system pH measurement device, the vertical distance between the first slurry outlet of the AFT tower and its bottom is 2-3 meters; the vertical distance between the second slurry outlet of the absorption tower and its bottom is also 2-3 meters. Sampling at this location better reflects the average condition of the slurry throughout the tower. Because the slurry has sufficient residence time and mixing within the tower, the sampled slurry is more uniform. The composition and properties of the slurry at this location are vertically consistent, thus enhancing the representativeness of the sample.
[0013] In the aforementioned pH measurement device for a single-tower, dual-circulation desulfurization system, the first slurry discharge gate, first flushing water gate, second flushing water gate, and second slurry discharge gate are each connected to their own electric actuator. All valves are connected to the electric actuators and integrated into the control system, enabling centralized control and unified management. This helps operators monitor and adjust the overall operating status of the desulfurization system in real time. Furthermore, remote control and automated operation are possible, improving work efficiency and safety.
[0014] Compared with existing technologies, the advantages of this single-tower dual-circulation desulfurization system pH measurement device are: 1. The circulation pool is small and modular in design, making it easy to install and maintain. 2. The sampling position is reasonable, and the measured slurry is uniform and highly representative. 3. The pH meter provides reliable measurement results and a long service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the overall structure provided by the utility model.
[0016] Figure 2 It is a schematic diagram of the cross-sectional structure of the circulation pool provided by the utility model.
[0017] In the figure, AFT tower 1, first slurry discharge pipeline 11, first circulation pool 12, three-way pipe 13, first flushing suction pipe 14, first slurry discharge gate 15, first flushing water gate 16, first slurry outlet 17, absorption tower 2, second slurry discharge pipeline 21, second circulation pool 22, three-way pipe 23, second flushing suction pipe 24, second slurry discharge gate 25, second flushing water gate 26, second slurry outlet 27, ditch 3, container body 41, pH meter probe 42, inlet 43, outlet 44, pH meter probe mounting hole 45. DETAILED DESCRIPTION
[0018] like Figure 1 As shown, the pH measuring device of the single-tower double-circulation desulfurization system includes an AFT tower 1 and an absorption tower 2. The AFT tower 1 and the absorption tower 2 are connected to the ditch 3 through a first slurry discharge pipeline 11 and a second slurry discharge pipeline 21 respectively. A first circulation pool 12 is provided on the first slurry discharge pipeline 11. The first slurry discharge pipeline 11 between the first circulation pool 12 and the AFT tower 1 is connected to a first flushing and suction pipe 14 through a three-way pipe 13. A second circulation pool 22 is provided on the second slurry discharge pipeline 21. The second slurry discharge pipeline 21 between the second circulation pool 22 and the absorption tower 2 is connected to a second flushing and suction pipe 24 through a three-way pipe 23. At least one inclined pH meter probe 42 is provided on the first circulation pool 12 and the second circulation pool 22.
[0019] In this example, the slurry from the AFT tower 1 and the absorption tower 2 is controlled by the first slurry discharge gate 15 or the second slurry discharge gate 25 to be discharged through the first slurry outlet 17 or the second slurry outlet 27, and flows into the first circulation pool 12 or the second circulation pool 22 through the first slurry discharge pipeline 11 or the second slurry discharge pipeline 21. The pH value of the slurry is detected by the inclined pH meter probe 42 in the circulation pool, so that the acidity and alkalinity of the raw materials can be grasped in real time. In addition, the first flushing and suction pipe 14 and the second flushing and suction pipe 24 are provided to achieve timely cleaning of the first circulation pool 12 or the second circulation pool 22, thereby ensuring the accuracy of the test results.
[0020] More specifically, a first pulp discharge gate 15 is provided between the three-way pipe 13 and the AFT tower 1, and a first flushing water gate 16 is provided between the three-way pipe 13 and the first flushing suction pipe 14;
[0021] A second pulp discharge gate 25 is provided between the second three-way pipe 23 and the absorption tower 2 , and a second flushing water gate 26 is provided between the second three-way pipe 23 and the second flushing suction pipe 24 .
[0022] like Figure 2 As shown, the first flow cell 12 and the second flow cell 22 include a cylindrical container body 41. An inlet 43 and an outlet 44 are respectively provided at the upper and lower ends of the container body 41. The diameters of the inlet 43 and the outlet 44 are both smaller than the inner diameter of the container body 41. At least one obliquely positioned pH probe mounting hole 45 is formed through the sidewall of the container body 41. A pH probe 42 is sealed and fixed within the pH probe mounting hole 45. The angle α formed between the central axis of the pH probe 42 and the central axis of the inlet 43 is 45 degrees. The pH probe 42 is connected to the pH probe mounting hole 45 via a threaded structure, and a sealing ring is provided between the pH probe mounting hole 45 and the pH probe 42.
[0023] In the present application, there are two pH meter probes 42 and they are distributed axially upward along the container body 41 .
[0024] More specifically, the central axis of the inlet 43 , the central axis of the outlet 44 and the central axis of the container body 41 are in the same straight line, and the inner end of the pH meter probe 42 is in the same straight line with the central axis of the container body 41 .
[0025] The inlet 43 and the outlet 44 are both provided with flanges for pipeline connection; the inlet 43, the outlet 44 and the inner wall of the container body 41 are all provided with an anti-corrosion coating; the vertical distance between the first slurry outlet 17 of the AFT tower 1 and the bottom of the tower is 2-3 meters; the vertical distance between the second slurry outlet 27 of the absorption tower 2 and the bottom of the tower is 2-3 meters; the first slurry discharge gate 15, the first flushing water gate 16, the second flushing water gate 26 and the second slurry discharge gate 25 are respectively connected to their respective electric actuators.
[0026] The working principle of this embodiment is that the slurry in the AFT tower 1 and the absorption tower 2 is controlled by the first slurry discharge gate 15 or the second slurry discharge gate 25 to be discharged through the first slurry outlet 17 or the second slurry outlet 27, and flows into the first circulation pool 12 or the second circulation pool 22 through the first slurry discharge pipeline 11 or the second slurry discharge pipeline 21;
[0027] After the slurry enters the circulation pool, the pH value is detected by the pH probe 42 installed in the pH probe installation hole 45. After the detection is completed, the slurry is discharged into the trench 3 for recovery;
[0028] Afterwards, the first flushing water gate 16 and the second flushing water gate 26 are opened, and the cleaning solution flows into the first circulation pool 12 or the second circulation pool 22 through the first flushing water suction pipe 14 or the second flushing water suction pipe 24, flushing the container body 41 and the pH meter probe 42. After the flushing is completed, the waste liquid is discharged into the ditch 3 for recovery. Then, the next detection cycle can be carried out.
[0029] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.
[0030] Although this document frequently uses terms such as AFT tower, first slurry discharge pipeline, first circulation tank, three-way pipe one, first flushing suction pipe, first slurry discharge gate, first flushing water gate, first slurry outlet, absorption tower, second slurry discharge pipeline, second circulation tank, three-way pipe two, second flushing suction pipe, second slurry discharge gate, second flushing water gate, second slurry outlet, trench, container body, pH meter probe, inlet, outlet, and pH meter probe mounting hole, the use of other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention. Interpreting them as any additional limitations is contrary to the spirit of the present invention.
Claims
1. A pH measuring device for a single-tower double-circulation desulfurization system, characterized in that: The invention comprises an AFT tower (1) and an absorption tower (2), wherein the AFT tower (1) and the absorption tower (2) are connected to a ditch (3) via a first pulp discharge pipeline (11) and a second pulp discharge pipeline (21), respectively; a first circulation pool (12) is provided on the first pulp discharge pipeline (11); the first pulp discharge pipeline (11) between the first circulation pool (12) and the AFT tower (1) is connected to a first flushing and suction pipe (14) via a first three-way pipe (13); a second circulation pool (22) is provided on the second pulp discharge pipeline (21); the second pulp discharge pipeline (21) between the second circulation pool (22) and the absorption tower (2) is connected to a second flushing and suction pipe (24) via a second three-way pipe (23); and at least one pH meter probe (42) arranged obliquely is provided on each of the first circulation pool (12) and the second circulation pool (22).
2. The pH measuring device for a single-tower double-circulation desulfurization system according to claim 1, characterized in that: A first pulp discharge gate (15) is provided between the three-way pipe (13) and the AFT tower (1), and a first flushing water gate (16) is provided between the three-way pipe (13) and the first flushing water suction pipe (14); A second pulp discharge gate (25) is provided between the second three-way pipe (23) and the absorption tower (2), and a second flushing water gate (26) is provided between the second three-way pipe (23) and the second flushing water suction pipe (24).
3. The pH measuring device for a single-tower double-circulation desulfurization system according to claim 2, characterized in that: The first circulation pool (12) and the second circulation pool (22) comprise a cylindrical container body (41), wherein the upper and lower ends of the container body (41) are respectively provided with an inlet (43) and an outlet (44), wherein the diameters of the inlet (43) and the outlet (44) are both smaller than the inner diameter of the container body (41), and at least one inclined pH meter probe mounting hole (45) is formed on the side wall of the container body (41), wherein the pH meter probe (42) is sealed and fixed in the pH meter probe mounting hole (45), and an angle α formed between the central axis of the pH meter probe (42) and the central axis of the inlet (43) is 45 degrees.
4. The pH measuring device for a single-tower double-circulation desulfurization system according to claim 3, characterized in that: There are two pH meter probes (42) distributed axially upward along the container body (41).
5. The pH measuring device for a single-tower double-circulation desulfurization system according to claim 3, characterized in that: The central axis of the inlet (43), the central axis of the outlet (44) and the central axis of the container body (41) are in the same straight line, and the inner end of the pH meter probe (42) and the central axis of the container body (41) are in the same straight line.
6. The pH measuring device for a single-tower double-circulation desulfurization system according to claim 3, characterized in that: The inlet (43) and the outlet (44) are both provided with flanges for pipeline connection.
7. The pH measuring device for a single-tower double-circulation desulfurization system according to claim 3, characterized in that: The inlet (43), the outlet (44) and the inner wall of the container body (41) are all provided with an anti-corrosion coating.
8. The pH measuring device for a single-tower double-circulation desulfurization system according to any one of claims 1 to 7, characterized in that: The vertical distance between the first slurry outlet (17) of the AFT tower (1) and the bottom of the tower is 2-3 meters; the vertical distance between the second slurry outlet (27) of the absorption tower (2) and the bottom of the tower is 2-3 meters.
9. The pH measuring device for a single-tower double-circulation desulfurization system according to any one of claims 2 to 7, characterized in that: The first pulp discharge door (15), the first flushing water door (16), the second flushing water door (26) and the second pulp discharge door (25) are all connected to respective electric actuators.