CN221100581U - Online pH measuring equipment of desulfurization thick liquid - Google Patents
Online pH measuring equipment of desulfurization thick liquid Download PDFInfo
- Publication number
- CN221100581U CN221100581U CN202322611698.8U CN202322611698U CN221100581U CN 221100581 U CN221100581 U CN 221100581U CN 202322611698 U CN202322611698 U CN 202322611698U CN 221100581 U CN221100581 U CN 221100581U
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- slurry
- electrode
- cylinder section
- drainage tube
- absorption tower
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 24
- 230000023556 desulfurization Effects 0.000 title claims abstract description 24
- 239000007788 liquid Substances 0.000 title description 3
- 239000002002 slurry Substances 0.000 claims abstract description 82
- 238000010521 absorption reaction Methods 0.000 claims abstract description 34
- 238000005507 spraying Methods 0.000 claims abstract description 9
- 238000011010 flushing procedure Methods 0.000 claims description 11
- 238000001139 pH measurement Methods 0.000 claims description 3
- 238000005299 abrasion Methods 0.000 abstract description 11
- 238000009991 scouring Methods 0.000 abstract description 8
- 230000005484 gravity Effects 0.000 abstract description 6
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 238000009423 ventilation Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 4
- 238000010992 reflux Methods 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
The utility model discloses on-line pH measuring equipment for desulfurization slurry, which comprises an absorption tower, a circulating pipeline, a circulating pump, a measuring cylinder, a drainage tube and a PH electrode, wherein the lower end of the circulating pipeline is in through connection with a slurry area of the absorption tower through the circulating pump, the upper end of the circulating pipeline is in through connection with a spraying area of the absorption tower, the measuring cylinder comprises a straight cylinder section, the lower end of the straight cylinder section is provided with a cone cylinder section, the lower port of the cone cylinder section is connected with the upper end of the drainage tube, the lower end of the drainage tube is in through connection with the circulating pipeline positioned at the downstream side of the circulating pump, the upper end of the straight cylinder section is in through connection with the absorption area inside the absorption tower through a return pipe, and the PH electrode is inserted and installed at the upper end of the straight cylinder section. The slurry enters the measuring cylinder through the drainage tube, the pressure of the slurry is released and the flow speed is rapidly reduced through the pipe diameter change of the conical cylinder section and the straight cylinder section and the self gravity of the slurry, the lower end of the PH electrode is inserted into the upper end of the slurry in the measuring cylinder, the scouring force of the slurry to the PH electrode is effectively reduced, the abrasion is reduced, and the service life is prolonged.
Description
Technical Field
The utility model belongs to the technical field of wet flue gas desulfurization slurry PH detection equipment, and particularly relates to desulfurization slurry on-line PH measurement equipment.
Background
At present, a limestone-gypsum method is mainly adopted in a wet flue gas desulfurization technology of a coal-fired power plant, and in the flue gas desulfurization process, the control of the pH value of desulfurization slurry in an absorption tower is a key factor for ensuring the efficiency of a desulfurization system and the safe and economic operation of the desulfurization system. The existing general online measurement mode of the pH value of the desulfurization slurry mainly comprises a direct method and a pumping method, wherein the direct method is to directly insert a glass electrode from the wall of an absorption tower into the slurry in the absorption tower for measurement; the extraction method is to install a reflux device outside the wall of the absorption tower, and to utilize the high-low pressure difference of the slurry in the absorption tower to generate self-flow, so that the slurry flows into the reflux device, and then to insert a glass electrode into the reflux device to measure the pH of the slurry. The solid content in the measured slurry is generally 12-18%, the measured slurry has corrosion and abrasion, and the abrasion to the PH electrode is larger when the slurry flow speed is higher, and the flow speeds of the measured slurry in the direct method and the extraction method are both higher, so that the abrasion to the PH electrode by the two measuring methods is serious, and the service life of the PH electrode is influenced.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art, and provides an online pH measuring device for desulfurization slurry, wherein when the pH of the slurry is measured normally, a part of slurry in a circulating pipeline positioned at the downstream side of a circulating pump enters a measuring cylinder through a drainage tube, and the pressure of the slurry in the measuring cylinder is released and the flow rate is rapidly reduced by overcoming the pipe diameter change of a conical cylinder section and a straight cylinder section and the gravity of the slurry, and the lower end of a pH electrode is inserted into the upper end of the slurry in the measuring cylinder, so that the scouring force of the slurry to the pH electrode is effectively reduced, the abrasion is reduced, and the service life of the pH electrode is prolonged; the whole structure design is ingenious and reasonable, the application and implementation feasibility is high, and the practicability is strong.
In order to achieve the above purpose, the technical scheme of the utility model is to design an online pH measuring device for desulfurization slurry, which comprises an absorption tower, a circulating pipeline and a circulating pump, wherein a slurry area, an absorption area and a spraying area are sequentially arranged inside the absorption tower from bottom to top, the lower end of the circulating pipeline is in through connection with the slurry area inside the absorption tower through the circulating pump, the upper end of the circulating pipeline is in through connection with the spraying area inside the absorption tower, the online pH measuring device further comprises a measuring cylinder, a drainage tube and a PH electrode, the measuring cylinder comprises a straight cylinder section, the lower end of the straight cylinder section is provided with a conical cylinder section with the caliber gradually shrinking downwards, the lower end of the conical cylinder section is connected with the upper end of the drainage tube, the lower end of the drainage tube is in through connection with the lower end of the circulating pipeline, the connecting point of the lower end of the drainage tube and the circulating pipeline is positioned at the downstream side of the circulating pump, the upper end of the straight cylinder section is in through connection with the absorption area inside the absorption tower through a return tube, and the upper end of the straight cylinder section is in plug-in connection with the PH electrode.
According to the online pH measuring equipment for the desulfurization slurry, when the pH of the slurry is measured normally, a part of the slurry in a circulating pipeline at the downstream side of a circulating pump enters the measuring cylinder through a drainage tube, the pressure of the slurry in the measuring cylinder is released and the flow rate is rapidly reduced by overcoming the pipe diameter change of a conical cylinder section and a straight cylinder section and the gravity of the slurry, the lower end of a pH electrode is inserted into the upper end of the slurry in the measuring cylinder, so that the scouring force of the slurry to the pH electrode is effectively reduced, the abrasion is reduced, and the service life of the pH electrode is prolonged; the whole structure design is ingenious and reasonable, the application and implementation feasibility is high, and the practicability is strong.
The preferable technical scheme is that the PH electrode is inserted into the measuring cylinder from the top of the straight cylinder section. The lower end of the PH electrode is inserted into the area with the slowest slurry flow velocity in the measuring cylinder, so that the scouring abrasion to the PH electrode is reduced to the greatest extent.
The further preferable technical scheme is that the inner diameter of the straight section is 5-10 times of the inner diameter of the drainage tube.
Further preferable technical scheme is that the top of the straight section is provided with an air-permeable bent pipe extending upwards, and the free port of the air-permeable bent pipe faces downwards. The ventilation bent pipe can remove the gas in the measuring cylinder to reduce the gas pressure in the measuring cylinder, so that the slurry pressure is fully released, and the flow speed is rapidly reduced; the free port of the ventilation elbow is directed downwards, so that external rainwater and dust are effectively prevented from entering the measuring cylinder through the ventilation elbow to pollute slurry.
Further preferable technical scheme is that the reflux pipe is provided with a valve I, and the lower port of the cone section is provided with a valve II.
Further preferable technical scheme is that the upper end of the return pipe is connected with a flushing pipe, and the flushing pipe is provided with a valve III. The drainage tube can be cleaned regularly through the flushing pipe, so that the internal blockage of the drainage tube is prevented.
The utility model has the advantages and beneficial effects that:
1. According to the online pH measuring equipment for the desulfurization slurry, when the pH of the slurry is measured normally, a part of the slurry in a circulating pipeline at the downstream side of a circulating pump enters the measuring cylinder through a drainage tube, the pressure of the slurry in the measuring cylinder is released and the flow rate is rapidly reduced by overcoming the pipe diameter change of a conical cylinder section and a straight cylinder section and the gravity of the slurry, the lower end of a pH electrode is inserted into the upper end of the slurry in the measuring cylinder, so that the scouring force of the slurry to the pH electrode is effectively reduced, the abrasion is reduced, and the service life of the pH electrode is prolonged; the whole structure design is ingenious and reasonable, the application and implementation feasibility is high, and the practicability is strong.
2. The PH electrode is inserted into the measuring cylinder from the top of the straight cylinder section. The lower end of the PH electrode is inserted into the area with the slowest slurry flow velocity in the measuring cylinder, so that the scouring abrasion to the PH electrode is reduced to the greatest extent.
3. The ventilation bent pipe can remove the gas in the measuring cylinder to reduce the gas pressure in the measuring cylinder, so that the slurry pressure is fully released, and the flow speed is rapidly reduced; the free port of the ventilation elbow is directed downwards, so that external rainwater and dust are effectively prevented from entering the measuring cylinder through the ventilation elbow to pollute slurry.
4. The upper end of the return pipe is connected with a flushing pipe, and the flushing pipe is provided with a valve III. The drainage tube can be cleaned regularly through the flushing pipe, so that the internal blockage of the drainage tube is prevented.
Drawings
FIG. 1 is a schematic diagram of an on-line pH measuring apparatus for desulfurizing slurry according to the present utility model;
fig. 2 is a partial enlarged view at H in fig. 1.
In the figure: 1. an absorption tower; 2. a circulation pipe; 3. a circulation pump; 4. a drainage tube; 5. a measuring cylinder; 6. a drainage tube; 7. a PH electrode; 8. a ventilation elbow; 9. a flushing pipe; 10. a valve I; 11. a second valve; 12. a third valve; 1-1, a slurry zone; 1-2, an absorption zone; 1-3, spraying area; 5-1, a straight cylinder section; 5-2, cone section.
Detailed Description
The following describes the embodiments of the present utility model further with reference to the drawings and examples. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and are not intended to limit the scope of the present utility model.
Examples
As shown in figures 1-2, the utility model relates to an online pH measuring device for desulfurization slurry, which comprises an absorption tower 1, a circulating pipeline 2 and a circulating pump 3, wherein the inside of the absorption tower 1 is sequentially provided with a slurry zone 1-1, an absorption zone 1-2 and a spraying zone 1-3 from bottom to top, the lower end of the circulating pipeline 2 is in through connection with the slurry zone 1-1 in the absorption tower 1 through the circulating pump 3, the upper end of the circulating pipeline 2 is in through connection with the spraying zone 1-3 in the absorption tower 1, the online pH measuring device further comprises a measuring cylinder 5, a drainage tube 4 and a PH electrode 7, the measuring cylinder 5 comprises a straight cylinder section 5-1, the lower end of the straight cylinder section 5-1 is provided with a conical cylinder section 5-2 with a caliber gradually shrinking downwards, the lower end of the conical cylinder section 5-2 is connected with the upper end of the drainage tube 4, the lower end of the drainage tube 4 is in through connection with the lower end of the circulating pipeline 2, the lower end of the drainage tube 4 is positioned on the downstream side of the circulating pump 3, the upper end of the straight cylinder section 5-1 is in through 6 and is connected with the upper end of the PH electrode of the absorption tower 1-1 through the upper end of the absorption tower 1-7.
Preferably, the PH electrode 7 is inserted into the measuring cylinder 5 from the top of the straight cylinder section 5-1.
Further preferably, the inner diameter of the straight section 5-1 is 5-10 times of the inner diameter of the drainage tube 4.
Further preferably, the top of the straight section 5-1 is provided with an air permeable bent pipe 8 extending upwards, and the free port of the air permeable bent pipe 8 faces downwards.
Further preferably, the return pipe 6 is provided with a valve I10, and the lower port of the conical section 5-2 is provided with a valve II 11.
It is further preferred that the upper end of the return pipe 6 is connected with a flushing pipe 9, and the flushing pipe 9 is provided with a valve III 12.
The utility model relates to an operating principle of on-line pH measuring equipment for desulfurization slurry, which comprises the following steps:
When the PH of the slurry is measured normally, the valve I10, the valve II 11 and the valve III 12 are opened, and the slurry in the slurry area 1-1 in the absorption tower 1 is continuously pumped into the spraying area 1-3 through the circulating pipeline 2 and the circulating pump 3, so that the circulating flow of the slurry is realized; the part of the slurry in the circulating pipeline 2 positioned at the downstream side of the circulating pump 3 enters the measuring cylinder 5 through the drainage tube 4, the pressure of the slurry in the measuring cylinder 5 is released and the flow speed is rapidly reduced by changing the pipe diameters of the conical cylinder section 5-2 and the straight cylinder section 5-1 and overcoming the gravity of the slurry, the lower end of the PH electrode 7 is inserted into the upper end of the slurry in the measuring cylinder 5, the scouring force of the slurry on the PH electrode 7 is effectively reduced, the abrasion is reduced, the liquid level of the slurry in the measuring cylinder 5 can be positioned below the top of the slurry by adjusting the opening of the valve I10, and the overflow of the slurry from the ventilation elbow 8 is avoided.
When the drainage tube 4 is required to be washed, the valve I10 and the valve III 12 are opened, the valve II 11 is closed, and washing water enters the drainage tube 4 through the washing pipe 9 to be washed, so that the drainage tube 4 is prevented from being blocked.
According to the online pH measuring equipment for the desulfurization slurry, when the pH of the slurry is measured normally, a part of the slurry in a circulating pipeline at the downstream side of a circulating pump enters the measuring cylinder through a drainage tube, the pressure of the slurry in the measuring cylinder is released and the flow rate is rapidly reduced by overcoming the pipe diameter change of a conical cylinder section and a straight cylinder section and the gravity of the slurry, the lower end of a pH electrode is inserted into the upper end of the slurry in the measuring cylinder, so that the scouring force of the slurry to the pH electrode is effectively reduced, the abrasion is reduced, and the service life of the pH electrode is prolonged; the whole structure design is ingenious and reasonable, the application and implementation feasibility is high, and the practicability is strong.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.
Claims (6)
1. The online pH measurement equipment for the desulfurization slurry comprises an absorption tower (1), a circulating pipeline (2) and a circulating pump (3), wherein a slurry zone (1-1), an absorption zone (1-2) and a spraying zone (1-3) are sequentially arranged in the absorption tower (1) from bottom to top, the lower end of the circulating pipeline (2) is in through connection with the slurry zone (1-1) in the absorption tower (1) through the circulating pump (3), the upper end of the circulating pipeline (2) is in through connection with the spraying zone (1-3) in the absorption tower (1), the online pH measurement equipment is characterized by further comprising a measuring cylinder (5), a drainage tube (4) and a PH electrode (7), the measuring cylinder (5) comprises a straight cylinder section (5-1), the lower end of the straight cylinder section (5-1) is provided with a conical cylinder section (5-2) with a caliber gradually shrinking downwards, the lower port of the conical cylinder section (5-2) is connected with the upper port of the drainage tube (4), the lower port of the drainage tube (4) is in through connection with the lower port of the circulating pipeline (2), the lower port of the drainage tube (4) is in communication with the downstream side of the circulating pump (3), the upper end of the straight section (5-1) is in through connection with an absorption area (1-2) in the absorption tower (1) through a return pipe (6), and the upper end of the straight section (5-1) is inserted and connected with a PH electrode (7).
2. The on-line pH measuring device for desulfurization slurry according to claim 1, wherein the PH electrode (7) is inserted into the measuring cylinder (5) from the top of the straight cylinder section (5-1).
3. The on-line pH measuring device for desulfurization slurry according to claim 2, wherein the inside diameter of the straight section (5-1) is 5 to 10 times the inside diameter of the draft tube (4).
4. An on-line pH measuring apparatus for desulfurization slurry according to claim 3, wherein the top of the straight section (5-1) is provided with an air-permeable bent pipe (8) extending upward, and the free end of the air-permeable bent pipe (8) is directed downward.
5. The on-line pH measuring device for desulfurization slurry according to claim 4, wherein the return pipe (6) is provided with a valve I (10), and the lower port of the conical section (5-2) is provided with a valve II (11).
6. The on-line pH measuring device for desulfurization slurry according to claim 5, wherein the upper end of the return pipe (6) is connected with a flushing pipe (9), and a valve III (12) is arranged on the flushing pipe (9).
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221100581U true CN221100581U (en) | 2024-06-07 |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant |