CN218445326U - Device for on-line detection of pH value - Google Patents
Device for on-line detection of pH value Download PDFInfo
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- CN218445326U CN218445326U CN202121945150.1U CN202121945150U CN218445326U CN 218445326 U CN218445326 U CN 218445326U CN 202121945150 U CN202121945150 U CN 202121945150U CN 218445326 U CN218445326 U CN 218445326U
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Abstract
The utility model discloses a device for on-line detection of pH value, which comprises an absorption tower, a slurry conveying pipeline, a sampling pipeline and a vertically arranged measuring cylinder; the outlet end of the slurry conveying pipeline is connected with the slurry inlet of the absorption tower; one end of the sampling pipeline is communicated with the slurry conveying pipeline, the other end of the sampling pipeline is connected with the bottom inlet of the measuring cylinder, and the top outlet of the measuring cylinder is connected with the slurry inlet of the absorption tower; at least one pH meter probe is obliquely arranged on the side wall of the measuring cylinder; the diameter of the measuring cylinder is larger than that of the sampling pipeline. The utility model discloses extension pH meter probe life improves pH meter probe measurement accuracy, reduces the use amount of pH meter probe, and guarantee flue gas emission to reach standard is reduced to need 8 every year by original 50 pH meter probes of annual needs.
Description
The technical field is as follows:
the utility model relates to a be used for on-line measuring pH value device belongs to thermal power plant's flue gas wet flue gas desulfurization technical field.
Background art:
can produce the flue gas that contains a large amount of sulfur dioxide in the industrial production process, the flue gas emission that contains a large amount of sulfur dioxide can the polluted environment in the air, uses the sulfur dioxide that contains in the wet flue gas desulfurization technology processing flue gas now generally, and in the wet flue gas desulfurization technology, the pH meter probe is used for the pH value of on-line measuring thick liquid, and then judges the sulfur dioxide index that contains in the flue gas.
In the prior art, in a wet desulphurization process, a pH meter probe is arranged at the top of a slurry conveying pipeline and made of organic glass, the conveyed slurry is acidic, a large number of fine particles are stored in the slurry, the slurry conveying pipeline is a DN50 glass steel pipeline, the flow rate of the slurry in the pipeline is 2.5 m/s, in the continuous use process of the pH meter probe, the pH meter probe is washed away by a large number of fine particles for a long time, fine grooves with different sizes can be formed, impurities are attached to the surface of the pH meter probe, a large amount of clear water is used for washing and wiping, stains attached to the surface cannot be removed, the accuracy of a detection result is influenced, the judgment on the index of the sulfur dioxide content in flue gas has serious hidden danger, and the probe made of other materials cannot meet the requirements of field use.
The invention content is as follows:
an object of the utility model is to provide a can slow down the device that is used for on-line measuring pH value to the wearing and tearing of pH meter probe surface.
The utility model discloses by following technical scheme implement: the device for detecting the pH value on line comprises an absorption tower, a slurry conveying pipeline, a sampling pipeline and a vertically arranged measuring cylinder; the outlet end of the slurry conveying pipeline is connected with the slurry inlet of the absorption tower; one end of the sampling pipeline is communicated with the slurry conveying pipeline, the other end of the sampling pipeline is connected with the bottom inlet of the measuring cylinder, and the top outlet of the measuring cylinder is connected with the slurry inlet of the absorption tower; at least one pH meter probe is obliquely arranged on the side wall of the measuring cylinder; the diameter of the measuring cylinder is larger than that of the sampling pipeline.
Furthermore, the diameter of the measuring cylinder is a 273mm stainless steel cylinder, and the sampling pipeline is a DN50 glass fiber reinforced plastic pipeline.
Furthermore, two fixed sleeves are symmetrically arranged on the side wall of the measuring cylinder, one end of each fixed sleeve is fixedly connected with the side wall of the measuring cylinder, and the fixed sleeves are communicated with the inside of the measuring cylinder; the other end of each fixed sleeve is fixedly inserted with the pH meter probe, the included angle between the axial direction of the fixed sleeve and the side wall of the measuring cylinder is alpha, and the alpha is 30-45 degrees.
Furthermore, the device for online detection of the pH value further comprises a mass flow meter, a first manual valve is arranged on the sampling pipeline, the inlet end of the first manual valve is connected with the inlet end of the mass flow meter through a first pipeline, the outlet end of the first manual valve is connected with the outlet end of the mass flow meter through a second pipeline, a second manual valve is arranged on the first pipeline, and a third manual valve is arranged on the second pipeline.
Furthermore, the device for on-line detection of the pH value further comprises a back-washing pipeline, a fourth manual valve is arranged at the inlet end of the sampling pipeline, the back-washing pipeline is communicated with the sampling pipeline at the outlet end of the fourth manual valve, and a fifth manual valve is arranged on the back-washing pipeline.
Utility model's advantage: the utility model discloses an increase and measure a section of thick bamboo, reduce the velocity of flow of thick liquid in measuring a section of thick bamboo, by original 2.5 meters/second, reduce to 0.125 meters/second, delay the thick liquid to the washing away of pH meter probe, reduce the gathering of deposit in the pipeline, extension pH meter probe life improves pH meter probe measurement accuracy, reduces the use amount of pH meter probe, and the guarantee flue gas is up to standard to be discharged, by original annual 50 pH meter probes that need, reduces to need 8 every year.
Description of the drawings:
fig. 1 is the overall structure diagram of the present invention.
Fig. 2 is an enlarged view of the local structure of the present invention.
In the figure: the device comprises a slurry conveying pipeline 1, a sampling pipeline 2, a measuring cylinder 3, a pH meter probe 4, a fixed sleeve 5, a mass flow meter 6, a first manual valve 7, a first pipeline 8, a second pipeline 9, a second manual valve 10, a third manual valve 11, a back washing pipeline 12, a fourth manual valve 13 and a fifth manual valve 14.
The specific implementation mode is as follows:
the present invention will be described in further detail with reference to examples.
As shown in fig. 1-2, the device for detecting pH value on line comprises an absorption tower, a slurry conveying pipeline 1, a sampling pipeline 2 and a vertically arranged measuring cylinder 3; the outlet end of the slurry conveying pipeline 1 is connected with a slurry inlet of the absorption tower; one end of the sampling pipeline 2 is communicated with the slurry conveying pipeline 1, the other end of the sampling pipeline 2 is connected with the bottom inlet of the measuring cylinder 3, and the top outlet of the measuring cylinder 3 is connected with the slurry inlet of the absorption tower; at least one pH meter probe 4 is obliquely arranged on the side wall of the measuring cylinder 3 downwards; the diameter of the measuring cylinder 3 is larger than the diameter of the sampling pipe 2. In this embodiment, the measuring cylinder 3 is a 273mm × 600mm stainless steel cylinder, and the sampling pipe 2 is a DN50 glass steel pipe. The distance from the installation position of the pH meter probe 4 to the top of the measuring cylinder 3 is 100-200mm. Through increasing the measuring cylinder 3, reduce the velocity of flow of thick liquid in the measuring cylinder 3, by original 2.5 meters/second, reduce to 0.125 meters/second, delay the thick liquid and to the washing away of pH meter probe 4, reduce the gathering of deposit in the pipeline, prolong pH meter probe 4 life, improve pH meter probe 4 measurement accuracy, reduce the use amount of pH meter probe 4, guarantee flue gas discharge to reach standard, by original annual 50 pH meter probes 4 that need, reduce to annual 8.
In a specific embodiment, two fixed sleeves 5 are symmetrically arranged on the side wall of the measuring cylinder 3, one end of each fixed sleeve 5 is fixedly connected with the side wall of the measuring cylinder 3, and the fixed sleeves 5 are communicated with the inside of the measuring cylinder 3; the other end of each fixed sleeve 5 is inserted and fixed with a pH meter probe 4, the included angle between the axial direction of the fixed sleeve 5 and the side wall of the measuring cylinder 3 is alpha, the alpha is 30-45 degrees, and the included angle is 45 degrees in the embodiment. The design of fixed sleeve 5 is used for fixed pH meter probe 4 on the one hand, and the reducible particle of on the other hand downward sloping setting is at the deposit of pH meter probe 4 surface in the thick liquid, improves the accuracy of detection.
In a specific embodiment, the sampling device further comprises a mass flow meter 6, a first manual valve 7 is arranged on the sampling pipeline 2, the inlet end of the first manual valve 7 is connected with the inlet end of the mass flow meter 6 through a first pipeline 8, the outlet end of the first manual valve 7 is connected with the outlet end of the mass flow meter 6 through a second pipeline 9, a second manual valve 10 is arranged on the first pipeline 8, and a third manual valve 11 is arranged on the second pipeline 9. The mass flow meter 6 of the present embodiment is a coriolis force mass flow meter for on-line measurement of the slurry density value. When the mass flow meter 6 needs to be repaired or the density of the slurry does not need to be detected, the first manual valve 7 is opened, the second manual valve 10 and the third manual valve 11 are closed, the mass flow meter 6 is cut out from the device, and the slurry directly flows into the measuring cylinder 3 for pH detection.
In one embodiment, a backwash line 12 is included for flushing the device. A fourth manual valve 13 is arranged at the inlet end of the sampling pipeline 2, a back washing pipeline 12 is communicated with the sampling pipeline 2 at the outlet end of the fourth manual valve 13, and a fifth manual valve 14 is arranged on the back washing pipeline 12.
Claims (5)
1. The device for detecting the pH value on line is characterized in that: the device comprises an absorption tower, a slurry conveying pipeline, a sampling pipeline and a vertically arranged measuring cylinder; the outlet end of the slurry conveying pipeline is connected with the slurry inlet of the absorption tower; one end of the sampling pipeline is communicated with the slurry conveying pipeline, the other end of the sampling pipeline is connected with the bottom inlet of the measuring cylinder, and the top outlet of the measuring cylinder is connected with the slurry inlet of the absorption tower; at least one pH meter probe is obliquely arranged on the side wall of the measuring cylinder; the diameter of the measuring cylinder is larger than that of the sampling pipeline.
2. The apparatus for on-line detection of pH value according to claim 1, characterized in that: the diameter of the measuring cylinder is a 273mm stainless steel cylinder body, and the sampling pipeline is a DN50 glass steel pipeline.
3. The apparatus for on-line detection of pH value according to claim 1, characterized in that: two fixed sleeves are symmetrically arranged on the side wall of the measuring cylinder, one end of each fixed sleeve is fixedly connected with the side wall of the measuring cylinder, and the fixed sleeves are communicated with the inside of the measuring cylinder; the other end of each fixed sleeve is fixedly inserted with the pH meter probe, the included angle between the axial direction of the fixed sleeve and the side wall of the measuring cylinder is alpha, and the alpha is 30-45 degrees.
4. The apparatus for on-line detection of pH according to any one of claims 1 to 3, characterized in that: the sampling device is characterized by further comprising a mass flow meter, a first manual valve is arranged on the sampling pipeline, the inlet end of the first manual valve is connected with the inlet end of the mass flow meter through a first pipeline, the outlet end of the first manual valve is connected with the outlet end of the mass flow meter through a second pipeline, a second manual valve is arranged on the first pipeline, and a third manual valve is arranged on the second pipeline.
5. The apparatus for on-line detection of pH according to any one of claims 1 to 3, characterized in that: the sampling device is characterized by further comprising a backwashing pipeline, a fourth manual valve is arranged at the inlet end of the sampling pipeline, the backwashing pipeline is communicated with the sampling pipeline at the outlet end of the fourth manual valve, and a fifth manual valve is arranged on the backwashing pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121945150.1U CN218445326U (en) | 2021-08-18 | 2021-08-18 | Device for on-line detection of pH value |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121945150.1U CN218445326U (en) | 2021-08-18 | 2021-08-18 | Device for on-line detection of pH value |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218445326U true CN218445326U (en) | 2023-02-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121945150.1U Active CN218445326U (en) | 2021-08-18 | 2021-08-18 | Device for on-line detection of pH value |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218445326U (en) |
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2021
- 2021-08-18 CN CN202121945150.1U patent/CN218445326U/en active Active
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