Ammonia desulfurization slurry density and pH value coupling measurement device
By designing an ammonia desulfurization slurry density and pH coupled measurement device with expanded tube type and using electric switch valves, regular flushing and self-mixing functions, the problems of wear and maintenance of pH meter electrodes in the existing devices are solved, and the measurement accuracy and reliability of the device are improved.
Patent Information
- Application Number
- CN202421527770.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-01
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-01
AI Technical Summary
In the existing ammonia desulfurization slurry density and pH measurement devices, the pH meter glass electrode is easily worn due to slurry erosion and inconvenient replacement, and is inconvenient for maintenance and maintenance, which affects the measurement accuracy.
A coupling measurement device for the ammonia desulfurization slurry density and pH value is designed. By setting an enlarged tube type and the inner diameter of the overflow outgoing tube is greater than the inner diameter of the slurry into the tube to reduce the slurry flow rate, the erosion wear of the glass pH meter electrode is reduced. At the same time, electric switch valves and regular flushing function are adopted to facilitate electrode replacement and maintenance, and prevent solid particles from precipitating through self-agitation.
It effectively alleviates the wear problem of pH meter electrodes, facilitates replacement and maintenance, improves measurement accuracy, and prevents solid particles from precipitating, ensuring the accuracy of density measurement.
Smart Images
Figure CN222800550U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of measuring devices, in particular to a device for coupling density and pH value of ammonia desulfurization slurry. Background Art
[0002] Ammonia desulfurization technology is widely used in the chemical industry. Ammonia is used to absorb sulfuric acid to produce SO2 in tail gas, and to produce ammonium sulfite and ammonium sulfate.
[0003] In ammonia desulfurization, slurry density and pH value are important parameters, but the existing measurement devices for slurry density and pH value of ammonia desulfurization have the following disadvantages:
[0004] (1) The glass electrode of the pH meter inside the existing ammonia desulfurization slurry density and pH value measurement device is easily worn due to the slurry scouring, and it is inconvenient to replace;
[0005] (2) The existing ammonia desulfurization slurry density and pH value measuring device is not convenient for maintenance and overhaul. For slurry containing solid particles, the solids in the slurry are easy to precipitate, affecting the density measurement accuracy. Utility Model Content
[0006] The purpose of the utility model is to provide a coupled measurement device for density and pH value of an ammonia-based desulfurization slurry, so as to solve the problems proposed in the above-mentioned background technology that the glass electrode of the pH meter inside the existing density and pH value measurement device for ammonia-based desulfurization slurry is easily worn due to the scouring of the slurry, and is inconvenient to replace, maintain and repair. For slurries containing solid particles, the solids in the slurry are easily precipitated, affecting the accuracy of density measurement.
[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a device for coupling density and pH value of an ammonia desulfurization slurry, comprising a measuring cylinder, a glass fiber reinforced plastic flange is installed on the top of the measuring cylinder, a ring seat is fixedly connected to the middle of the top of the glass fiber reinforced plastic flange, a pH meter electrode is installed on the inner wall of the ring seat, a slurry inlet pipe is fixedly connected to the bottom end of the measuring cylinder, a flushing water inlet pipe is fixedly connected to the top of the slurry inlet pipe, a bottom opening is provided at the bottom of the measuring cylinder, a top opening is provided at the top of the measuring cylinder, a double-flange differential pressure transmitter is installed on the surface of the bottom opening and the surface of the top opening, an overflow outlet pipe is fixedly connected to the top of the measuring cylinder located above the top opening, accommodating grooves are provided on both sides of the inner wall of the ring seat, a clamping block is slidably connected to the inner wall of the accommodating groove, and grooves are provided on both sides of the top of the pH meter electrode.
[0008] When using an ammonia desulfurization slurry density and pH value coupling measurement device of the present technical solution, by setting it to an expansion tube type, and the inner diameter of the overflow outlet pipe of the outflowing liquid is larger than the inner diameter of the slurry inlet pipe of the inflowing liquid, the slurry flow rate is reduced, and the scouring and wear of the glass pH meter electrode by the buffer slurry is achieved.
[0009] As a preferred technical solution of the utility model, the top end of the pH meter electrode is connected to an electrode cable, and one end of the electrode cable is connected to a pH meter transmitter box. The pH value of the slurry is measured by the pH meter transmitter in the box.
[0010] As a preferred technical solution of the utility model, an electric switch valve 1 is installed at the bottom of the slurry inlet pipe. The electric switch valve 1 is used to control the opening and closing of the slurry inlet pipe.
[0011] As a preferred technical solution of the utility model, an electric switch valve 2 is installed on the surface of the flushing water inlet pipe. The electric switch valve 2 is used to control the opening and closing of the flushing water inlet pipe.
[0012] As a preferred technical solution of the utility model, the inner diameter of the overflow outlet pipe is larger than the inner diameter of the slurry inlet pipe. The caliber of the outlet pipe is larger than the caliber of the inlet pipe to reduce the slurry flow rate.
[0013] As a preferred technical solution of the utility model, a threaded hole is opened on one side of the inner wall of the accommodating groove, a threaded rod is threadedly connected to the inner wall of the threaded hole, and one end of the threaded rod is rotatably connected to a clamping block through a bearing. The clamping block can be driven to move horizontally by rotating the threaded rod.
[0014] As a preferred technical solution of the utility model, the clamping block is engaged with the inner wall of the groove. The engagement of the clamping block with the groove can limit the position of the pH meter electrode.
[0015] As a preferred technical solution of the utility model, one end of the threaded rod away from the clamping block is fixedly connected with a knob, and the knob is provided to facilitate the rotation of the threaded rod.
[0016] Compared with the prior art, the beneficial effects of the utility model are:
[0017] 1. The ammonia desulfurization slurry density and pH value measuring device is set to an expansion tube type, and the inner diameter of the overflow outlet pipe of the outflowing liquid is larger than the inner diameter of the slurry inlet pipe of the inflowing liquid, so as to reduce the slurry flow rate and buffer the slurry from scouring and wearing the glass pH meter electrode. By rotating the knobs on both sides of the annular seat to drive the clamping block to move, the clamping block is inserted into or out of the grooves on both sides of the pH meter electrode, so that the pH meter electrode can be installed or disassembled, which is convenient for replacement;
[0018] 2. The pH meter electrode can be installed in an immersed manner. After the liquid inlet valve and flushing valve are changed to electric operation, regular flushing can be achieved through program operation. The liquid inlet valve can be closed before stopping the pump to ensure that the electrode is not dehydrated. Through the redundant configuration of the device, the liquid inlet valve and flushing valve can be closed to replace the electrode and calibrate the instrument regularly. The operation and control of the desulfurization system will not be affected. For slurry containing solid particles entering from the bottom, the self-stirring function is realized to prevent solid precipitation in the slurry and ensure the accuracy of density measurement. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a structural schematic diagram of the utility model;
[0020] Figure 2 It is a plan view of the slurry inlet pipe of the utility model;
[0021] Figure 3 It is a top cross-sectional view of the annular seat of the utility model.
[0022] In the figure: 1. pH meter transmitter box; 2. Electrode cable; 3. pH meter electrode; 4. FRP flange; 5. Measuring tube; 6. Overflow outlet pipe; 7. Bottom port; 8. Top port; 9. Double flange differential pressure transmitter; 10. Slurry inlet pipe; 11. Rinsing water inlet pipe; 12. Electric switch valve 1; 13. Electric switch valve 2; 14. Annular seat; 15. Receiving groove; 16. Threaded hole; 17. Threaded rod; 18. Knob; 19. Clamping block; 20. Groove. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0024] See also Figure 1-3The utility model provides a coupled measuring device for density and pH value of ammonia desulfurization slurry, including a measuring cylinder 5, a glass fiber reinforced plastic flange 4 is installed at the top of the measuring cylinder 5, a ring seat 14 is fixedly connected to the middle of the top of the glass fiber reinforced plastic flange 4, a pH meter electrode 3 is installed on the inner wall of the ring seat 14 for detecting the pH value of the slurry, a slurry inlet pipe 10 is fixedly connected to the bottom end of the measuring cylinder 5 for inputting slurry, a flushing water inlet pipe 11 is fixedly connected to the top of the slurry inlet pipe 10 for cleaning the inner wall of the device, a bottom port 7 is provided at the bottom of the measuring cylinder 5, a top port 8 is provided at the top of the measuring cylinder 5, a double-flange differential pressure transmitter 9 is installed on the surface of the bottom port 7 and the surface of the top port 8 for detecting the density of the slurry, an overflow outlet pipe 6 is fixedly connected to the top of the measuring cylinder 5 above the top port 8 for discharging the slurry, a receiving groove 15 is provided on both sides of the inner wall of the ring seat 14, a clamping block 19 is slidably connected to the inner wall of the receiving groove 15, and grooves 20 are provided on both sides of the top of the pH meter electrode 3 for disassembly and assembly.
[0025] When in use, the slurry containing solid particles enters from the bottom to realize the self-stirring function, prevent the solid precipitation in the slurry, ensure the accuracy of density measurement, and measure the density through the double flange differential pressure transmitter 9, the change of differential pressure is proportional to the slurry density, that is, ρ = P / gH. The slurry in the slurry inlet pipe 10 comes from the circulation pump outlet pipe, the flushing water in the flushing water inlet pipe 11 comes from the process water, and the slurry liquid overflowing from the overflow pipe 6 overflows back to the tower.
[0026] The top of the pH meter electrode 3 is connected to an electrode cable 2, and one end of the electrode cable 2 is connected to a pH meter transmitter box 1 for detecting the pH value. An electric switch valve 12 is installed at the bottom of the slurry inlet pipe 10, and an electric switch valve 2 13 is installed on the surface of the flushing water inlet pipe 11 to control the opening and closing of the pipeline. The inner diameter of the overflow outlet pipe 6 is larger than the inner diameter of the slurry inlet pipe 10.
[0027] When in use, the pH meter electrode 3 is connected to the pH meter transmitter in the box through the electrode cable 2, and the pH value of the slurry can be detected. The measuring tube 5 is set to an expanded tube type, and the inner diameter of the overflow outlet pipe 6 of the outflowing liquid is larger than the inner diameter of the slurry inlet pipe 10 of the inflowing liquid, so as to reduce the slurry flow rate and buffer the scouring and wear of the glass pH meter electrode 3 by the slurry. After the liquid inlet valve and the flushing valve are changed to electric operation, regular flushing is achieved through program operation, and the liquid inlet valve is closed before stopping the pump to ensure that the electrode is not dehydrated.
[0028] A threaded hole 16 is provided on one side of the inner wall of the accommodating groove 15, and a threaded rod 17 is threadedly connected to the inner wall of the threaded hole 16. One end of the threaded rod 17 is rotatably connected to a clamping block 19 through a bearing. The clamping block 19 is engaged with the inner wall of the groove 20 to play a locking role. The end of the threaded rod 17 away from the clamping block 19 is fixedly connected to a knob 18 for easy operation.
[0029] When in use, by rotating the knobs 18 on both sides of the annular seat 14, the threaded rod 17 is driven to rotate, and then the clamping blocks 19 on both sides are moved to make them fit into or disengage from the grooves 20 on both sides of the pH meter electrode 3, so that the pH meter electrode 3 can be installed or disassembled for easy replacement.
[0030] In specific use, the utility model is a coupled measuring device for density and pH value of ammonia desulfurization slurry. The measuring tube 5 is set as an enlarged tube type, and the inner diameter of the overflow outlet pipe 6 of the outflowing liquid is larger than the inner diameter of the slurry inlet pipe 10 of the inflowing liquid, so as to reduce the slurry flow rate and buffer the slurry from scouring and wearing the glass pH meter electrode 3. By rotating the knobs 18 on both sides of the annular seat 14, the threaded rod 17 is driven to rotate, and then the clamping blocks 19 on both sides are moved to make them fit into the grooves 20 on both sides of the pH meter electrode 3 or disengage from them, so that the pH meter electrode 3 can be installed or disassembled, which is convenient for replacement, and the pH meter electrode 3 can be immersed in the installation. After the liquid inlet valve and the flushing valve are changed to electric operation, regular flushing can be achieved through program operation. , before stopping the pump, close the liquid inlet valve to ensure that the electrode is not dehydrated. Through the redundant configuration of the device, the liquid inlet valve and the flushing valve can be closed to replace the electrode and calibrate the instrument regularly, and the operation and control of the desulfurization system will not be affected. For the slurry containing solid particles entering from the bottom, the self-stirring function is realized to prevent the solid precipitation in the slurry and ensure the accuracy of density measurement. The density is measured by the change of the differential pressure of the double flange differential pressure transmitter 9 which is proportional to the slurry density, that is, ρ=P / gH (P: differential pressure value pa, g: constant 9.8, H: fixed height 1m, constant). The slurry in the slurry inlet pipe 10 comes from the outlet pipe of the circulation pump, the flushing water in the flushing water inlet pipe 11 comes from the process water, and the slurry liquid overflowing from the overflow pipe 6 overflows back to the tower.
[0031] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.
Claims
1. A device for coupling density and pH value measurement of ammonia desulfurization slurry, comprising a measuring tube (5), characterized in that: The top of the measuring cylinder (5) is provided with a glass fiber reinforced plastic flange (4), the middle of the top of the glass fiber reinforced plastic flange (4) is fixedly connected to an annular seat (14), the inner wall of the annular seat (14) is provided with a pH meter electrode (3), the bottom of the measuring cylinder (5) is fixedly connected to a slurry inlet pipe (10), the top of the slurry inlet pipe (10) is fixedly connected to a flushing water inlet pipe (11), the bottom of the measuring cylinder (5) is provided with a bottom opening (7), and the measuring cylinder (5) A top opening (8) is provided at the top of the bottom opening (7), a double-flange differential pressure transmitter (9) is installed on the surface of the bottom opening (7) and the surface of the top opening (8), the top of the measuring tube (5) is located above the top opening (8) and is fixedly connected to an overflow outlet pipe (6), both sides of the inner wall of the annular seat (14) are provided with accommodating grooves (15), the inner wall of the accommodating groove (15) is slidably connected to a clamping block (19), and both sides of the top of the pH meter electrode (3) are provided with grooves (20).
2. The device for coupling density and pH value of ammonia desulfurization slurry according to claim 1, characterized in that: The top end of the pH meter electrode (3) is connected to an electrode cable (2), and one end of the electrode cable (2) is connected to a pH meter transmitter box (1).
3. The device for coupling density and pH value of ammonia desulfurization slurry according to claim 1, characterized in that: An electric switch valve (12) is installed at the bottom of the slurry inlet pipe (10).
4. The device for coupling density and pH value of ammonia desulfurization slurry according to claim 1, characterized in that: A second electric switch valve (13) is installed on the surface of the flushing water inlet pipe (11).
5. The device for coupling density and pH value of ammonia desulfurization slurry according to claim 1, characterized in that: The inner diameter of the overflow outlet pipe (6) is greater than the inner diameter of the slurry inlet pipe (10).
6. The device for coupling density and pH value of ammonia desulfurization slurry according to claim 1, characterized in that: A threaded hole (16) is provided on one side of the inner wall of the accommodating groove (15), a threaded rod (17) is threadedly connected to the inner wall of the threaded hole (16), and one end of the threaded rod (17) is rotatably connected to a clamping block (19) via a bearing.
7. The device for coupling density and pH value of ammonia desulfurization slurry according to claim 1, characterized in that: The clamping block (19) is engaged with the inner wall of the groove (20).
8. The device for coupling density and pH value of ammonia desulfurization slurry according to claim 6, characterized in that: One end of the threaded rod (17) away from the clamping block (19) is fixedly connected with a knob (18).