CN216560464U - Flow cell device for measuring fluid parameters in pipeline - Google Patents
Flow cell device for measuring fluid parameters in pipeline Download PDFInfo
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- CN216560464U CN216560464U CN202122629858.2U CN202122629858U CN216560464U CN 216560464 U CN216560464 U CN 216560464U CN 202122629858 U CN202122629858 U CN 202122629858U CN 216560464 U CN216560464 U CN 216560464U
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Abstract
The utility model provides a flow cell device for measuring fluid parameters in a pipeline, which comprises: the device comprises a first flange used for being connected with an upstream pipeline, a second flange used for being connected with a downstream pipeline, a first elbow transversely bent from the first flange, a U-shaped pipe section communicated with the first elbow through a descending section, and a second elbow of which one end is communicated with the ascending section of the U-shaped pipe section and the other end is connected with the second flange, wherein the upper end of the descending section of the U-shaped pipe section is an opening used for inserting a measuring probe, the first elbow is communicated below the opening at the upper end of the descending section of the U-shaped pipe section, and the distance between the first flange and the second flange is 20-200 cm. The utility model ensures that the process medium is fully contacted with the measuring probe, avoids the influence of adverse factors such as flow velocity of the process medium, bubbles and the like in the pipeline and measures in real time; the authenticity and the stability of the measured data are ensured, and the accuracy is improved; the service life of the instrument is prolonged.
Description
Technical Field
The utility model belongs to the technical field of fluid measurement, and particularly relates to a flow cell device for measuring fluid parameters in a pipeline.
Background
In the chemical industry at present, most of analytical instrument sensor probes such as pH, ORP (oxidation reduction potential) and conductivity meters are installed on a flow cell or a pipeline to be measured for sampling and measurement, but the analytical instrument sensor probes have more influence factors on the measurement result, for example, the pipeline is directly installed with a sensor, the measurement sample cannot be fully contacted with the sensor, the flow rate of the pipeline is too large, bubbles are easily generated in the pipeline, the fluctuation of the measurement data is large, and the measurement accuracy is influenced.
In view of the fact that the current analytical instrument sensor probe is directly installed on a pipeline and is influenced by factors such as the flow rate of the pipeline, bubbles possibly generated in the pipeline, insufficient contact between the probe and a process medium and the like, most of the analytical instrument sensor probes are installed and measured by adopting a traditional flow cell, the traditional flow cell is made of materials such as PVC, PTFE, PVDF and stainless steel, samples circulate in the flow cell and then flow into a specified sewage discharge port to be measured, and the instrument is installed in the flow cell to be measured.
The above measurement method has the following disadvantages:
1. the difference of the installation positions causes measurement errors in measurement results, the fluctuation of measurement data is large, and the measurement results are influenced.
2. The pipeline direct mount, the sensor can not fully contact the medium, and the velocity of flow is unstable, influences the measuring result.
3. Factors such as flow velocity of a measuring medium, impurities, suspended matters, sludge, bubbles in a pipeline and the like interfere measurement precision, the service life of a sensor probe is influenced, and the service life is shortened.
4. The maintenance is inconvenient, and the probe cannot be maintained regularly.
5. Traditional flow cell installation is measured, still exist because the not enough easy gassing that leads to measuring pipe way in the design, cause the measured data fluctuation great, can't reflect and measure true numerical value, cause the measured data to have the deviation, influence process control, in addition, adopt pipeline siding drainage sampling, there is certain problem in the representativeness of sampling, the drainage flows in the drain, to some special properties (for example acid-base nature or corrosivity) process medium cause environmental protection scheduling problem easily, the restricted scheduling problem is used to the flow cell.
SUMMERY OF THE UTILITY MODEL
This patent proposes a pipeline formula flow-through cell device, through installing the flow-through cell on the pipeline, the sample flows through in the flow-through cell, and the analytical instrument sensor that sets up in the real-time abundant contact flow-through cell further satisfies the measurement requirement through valve regulation control process medium velocity around the flow-through cell device, reaches the purpose of accurate measurement, extension probe life-span.
According to a first embodiment of the present invention there is provided a flow cell device for fluid parameter measurement in a conduit, comprising:
a first flange used for connecting with an upstream pipeline, a second flange used for connecting with a downstream pipeline, a first elbow transversely bent from the first flange, a U-shaped pipe section communicated with the first elbow through a descending section, a second elbow of which one end is communicated with the ascending section of the U-shaped pipe section and the other end is connected with the second flange, wherein the upper end of the descending section of the U-shaped pipe section is provided with an opening capable of being inserted with a measuring probe, the first elbow is communicated below the opening at the upper end of the descending section of the U-shaped pipe section, the upper end of the descending section of the U-shaped pipe section is higher than the top of the joint of the first elbow and the descending section of the U-shaped pipe section,
wherein the (linear) distance between the first flange and the second flange is 20-200 cm.
Furthermore, a third flange is connected to an opening at the upper end of the descending section of the U-shaped pipe section.
Further, the inner and outer diameters of the first elbow, the U-shaped pipe section and the second elbow are consistent with the inner and outer diameters of the upstream pipeline and the downstream pipeline.
Further, the upper end of the descending section of the U-shaped pipe section is higher than the top of the connection between the first bend and the descending section of the U-shaped pipe section, and preferably higher than the top of the second bend.
Further, the upper end of the descending section of the U-shaped pipe section is higher than the top of the second elbow; and/or the distance between the top of the connection part of the first elbow and the descending section of the U-shaped pipe section and the upper end of the descending section of the U-shaped pipe section is 4-15cm, preferably 5-12cm, further for example 6-10cm, the upper end of the descending section of the U-shaped pipe section is arranged at a certain distance higher than the top of the connection part of the first elbow and the descending section of the U-shaped pipe section, so that an accommodating space can be provided for bubbles or gas possibly generated in measurement, the influence of the bubbles or gas on the measurement result is eliminated, in addition, the accommodating space can also provide a cavity separated from the measured process medium for the inserted measuring probe, and therefore when the measurement is not needed, the measuring probe can lift upwards the process medium temporarily separated from the descending section of the U-shaped pipe section, and further the service life of the probe is prolonged. In the application, the U-shaped pipe section comprises a descending section, a bottom horizontal section and an ascending section, and the joints of the ascending section, the descending section and the bottom horizontal section are generally subjected to circular passivation treatment. The uppermost part of the descending section is an opening and can be connected with a third flange, and the uppermost end of the ascending section is connected with the lower port of the second elbow. A sludge discharge port can be designed at the horizontal section of the bottom.
Further, the height of the U-shaped pipe section is 15-60cm, preferably 25-50cm, preferably 30-45 cm; the width of the U-shaped pipe section, i.e. the distance between the descending and ascending sections of the U-shaped pipe section (the distance between the longitudinal axes), is 10-40cm, preferably 15-35cm, further 20-30cm, for example 25 cm.
Furthermore, a third flange connected with an opening at the upper end of the descending section of the U-shaped pipe section is covered by a cover plate, and a hole for the measuring probe to pass through is formed in the cover plate. The central threaded interface of the mating connection cover plate can be 3/4NPT in size and is used for installing measuring probe sensors for pH, ORP (oxidation reduction potential), conductance and the like. Preferably, a sealing gasket is arranged between the cover plate and the third flange.
Further, the upper end of the descending section of the U-shaped pipe section is higher than the upstream pipe, for example 4-15cm, preferably 5-12cm, further for example 6-10cm higher than the top of the upstream pipe.
Further, the upper parts of the first bend and the second bend are at the same height level as the upstream pipe and the downstream pipe.
Further, the (straight) distance between the first flange and the second flange may be 30-100cm, more preferably 40-80cm, more preferably 45-60 cm.
Further, a first valve is disposed between the first flange and the upstream pipe, and a second valve is disposed between the second flange and the downstream pipe. The first valve is connected with the first flange and the upstream pipeline through flanges, and the second valve is connected with the second flange and the downstream pipeline through flanges. Preferably, first valve and second valve are stop valve or gate valve for velocity of flow in the regulation control pipeline, preferably make pipeline velocity of flow can not be higher than 2m/s, the curved design of flow-through cell buffering, this design plays the cushioning effect to the medium, protects measuring probe, in order to avoid the velocity of flow too fast, erode probe sensor, avoid producing interference factors such as bubble simultaneously and influence the measurement. The flow cell is designed such that the fluid to be measured flows in from the bottom of the probe of the meter and flows out from the side.
Further, the upper end of the descending section of the U-shaped pipe section of the flow cell is provided with an exhaust port or an emptying valve, generated gas can be discharged in time, the safety and the stability of flow cell measurement are provided, and the pressure influence of 9 gas gathering of the descending section of the U-shaped pipe section is avoided.
Further, a bypass line is provided between the upstream of the first valve and the downstream of the second valve, the bypass line being provided with a bypass valve. The bypass valve for maintenance is designed on the pipeline, when the maintenance instrument is cleaned, the bypass stop valve is opened, the first stop valve or gate valve and the second stop valve or gate valve in the front and at the back of the flow cell are closed, the instrument connecting flange is disassembled, and online maintenance and calibration can be realized.
Furthermore, the measuring probe is screwed in from the central hole of the cover plate and inserted into the descending section of the U-shaped pipe section of the flow cell device, preferably located at 1/5-4/5 of the height of the descending section, preferably 2/5-7/10, more preferably about 2/3 of the height. The measuring probe is not arranged at the middle lower part and the bottom of the descending section of the U-shaped pipe section, so that the impact force of the inflowing process medium on the probe can be avoided, and a coating layer for the measuring probe can be formed when the process medium possibly contains more impurities, thereby losing the opportunity of measuring the flowing process medium and causing the distortion of the measuring result.
The working principle of the pipeline type flow cell device is as follows:
a connecting flange is arranged between an upstream pipeline and a downstream pipeline of fluid parameters to be measured and is respectively connected with a first flange and a second flange of the pipeline type flow cell device, the fluid enters a descending section of a U-shaped pipe section from a first elbow, a mixing effect is generated due to the redirection of the fluid at the descending section, the fluid is uniformly mixed and is fully contacted with a measuring probe, the measuring result is more accurate, and then the fluid downwards reaches a horizontal section at the bottom of the U-shaped pipe and sequentially enters an ascending section of the U-shaped pipe section, a second elbow and the downstream pipeline.
In the preferred embodiment, a first valve is arranged between a first flange and an upstream pipeline, the first valve is a stop valve, a second valve is arranged between a second flange and a downstream pipeline, the second valve is also a stop valve, the first flange and the upstream pipeline are connected through flanges, the second valve, the second flange and the downstream pipeline are also connected through flanges, the first valve and the second valve can be used for adjusting and controlling the flow velocity in the pipeline, the flow velocity of the pipeline can not be higher than 2m/s, the flow cell adopts a buffer bend design of a first bend and a second bend, the buffer bend design has a buffer effect on high-speed flowing media entering the flow cell, and the measurement probe is protected so as to prevent the flow velocity from being too high and washing a probe sensor, and simultaneously avoid interference factors such as bubbles from influencing measurement. In addition, a bypass line is provided between the upstream of the first valve and the downstream of the second valve, and a bypass valve is provided in the bypass line. The bypass valve for maintenance is designed on the pipeline, when the maintenance instrument is cleaned, the bypass stop valve is opened, the front stop valve and the rear stop valve of the flow cell are closed, the instrument connecting flange is disassembled, and online maintenance and calibration can be realized.
In the present invention, the fluids to be measured include all process fluids, in particular fluids for which it is necessary to measure one or more of pH, oxidation-reduction potential, conductivity, etc.
THE ADVANTAGES OF THE PRESENT INVENTION
1. According to the utility model, the flow cell is designed to be provided with the first elbow, the second elbow and the U-shaped pipe section, so that the process medium is ensured to be fully contacted with the measuring probe, the influence of adverse factors such as the flow velocity of the process medium in the pipeline and bubbles is avoided, and the real-time measurement is realized.
2. The authenticity and the stability of the measured data are ensured, and the accuracy is improved.
3. The service life of the instrument is prolonged.
4. The installation and the manufacture are convenient, and the online maintenance can be realized.
Drawings
FIG. 1 is a prior art fluid parameter measurement device in a pipeline.
FIG. 2 is a schematic view of a flow cell apparatus of the tubular type according to an embodiment of the present invention.
FIG. 3 is a schematic view of a tubular flow cell apparatus according to another embodiment of the present invention.
Fig. 4 is a schematic illustration of a cover plate with a screwed-in measuring probe.
Wherein: 1-a first flange, 2-a second flange, 3-a first elbow, 4-a U-shaped pipe section, 5-a second elbow, 6-a measuring probe, 7-a third flange, 8-a cover plate, 9-a descending section, 10-an ascending section, 11-a first valve, 12-a second valve, 13-a by-pass pipe, 14-a by-pass valve, 15-an upstream pipeline and 16-a downstream pipeline.
Detailed Description
The utility model is further illustrated below with reference to the figures and examples.
As shown in fig. 2 and 3, a flow cell device for fluid parameter measurement in a pipe, comprising:
a first flange 1 used for connecting with an upstream pipeline 15, a second flange 2 used for connecting with a downstream pipeline 16, a first elbow 3 bent from the transverse side of the first flange, a U-shaped pipe section 4 with a descending section 9 connected with the first elbow, a second elbow 5 with one end connected with an ascending section 10 of the U-shaped pipe section and the other end connected with the second flange 2, wherein the upper end of the descending section 9 of the U-shaped pipe section is an opening used for inserting a measuring probe 6, the first elbow 3 is connected below the opening at the upper end of the descending section 9 of the U-shaped pipe section, the upper end of the descending section of the U-shaped pipe section is higher than the top of the connection part of the first elbow and the descending section of the U-shaped pipe section,
wherein the (linear) distance between the first flange and the second flange is 20-200 cm.
The opening at the upper end of the descending section of the U-shaped pipe section is connected with a third flange 7.
In a preferred embodiment, the inner and outer diameters of the first bend 3, the U-shaped pipe section 4 and the second bend 5 correspond to the inner and outer diameters of the upstream pipe 15 and the downstream pipe 16.
The upper end of the descending section of the U-shaped pipe section is preferably higher than the top of the second bend, and the distance between the top of the connection of the first bend and the descending section of the U-shaped pipe section and the upper end of the descending section of the U-shaped pipe section is, for example, 4-15cm, preferably 5-12cm, and further, for example, 6-10 cm.
In one embodiment, the height of the U-shaped tube section is from 15 to 60cm, preferably from 25 to 50cm, preferably from 30 to 45 cm; the width of the U-shaped pipe section, i.e. the distance between the descending and ascending sections of the U-shaped pipe section (the distance between the longitudinal axes), is 10-40cm, preferably 15-35cm, further 20-30cm, for example 25 cm.
The third flange 7 connected to the upper opening of the lower section 9 of the U-shaped pipe section can be covered by a cover plate 8, and the cover plate 8 is provided with a hole for the measuring probe 6 to pass through. The size of the central threaded interface of the mating connection cover plate can be 3/4NPT, and the mating connection cover plate is used for installing measuring probe sensors such as pH, ORP (oxidation reduction potential), conductivity meters and the like. Preferably, a sealing gasket is arranged between the cover plate 8 and the third flange, and the cover plate 8 and the third flange can be fixed through bolts.
The upper end of the descending section 9 of the U-shaped pipe section is higher than the upstream pipe 15, for example 4-15cm, preferably 5-12cm, further for example 6-10cm higher than the top of the upstream pipe 15.
In a preferred embodiment, the upper parts of the first bend 3, the second bend 5 are at the same level as the upstream pipe 15 and the downstream pipe 16.
The distance between the first flange and the second flange is preferably 30-100cm, more preferably 40-80cm, more preferably 45-60 cm.
In another preferred embodiment, a first valve 11 is provided between the first flange 1 and the upstream pipe 15, and a second valve 12 is provided between the second flange 2 and the downstream pipe 16. The first valve 11 is flanged to the first flange 1 and the upstream pipe 15, and the second valve 12 is flanged to the second flange 2 and the downstream pipe 16. First valve 11 and second valve 12 are preferred stop valves for velocity of flow in the regulation control pipeline, it is preferred to make the pipeline velocity of flow can not be higher than 2m/s, the flow-through cell adopts the curved design of buffering of first elbow 3 and second elbow 5, this design can play the cushioning effect to the high-speed flowing medium that gets into in the flow-through cell, protect measuring probe, so as to avoid the velocity of flow too fast, wash away probe sensor, simultaneously, the design that the upper end of descending section 9 of the U type pipe section of flow-through cell is higher than the top of upstream pipeline 15 and second elbow 5, fluid foam and the gaseous dwell space that supplies to get into in the flow-through cell have been provided, interference factors such as the fluid production bubble that can avoid getting into in the flow-through cell influence the measurement. The flow cell is designed such that the fluid to be measured flows in from the bottom of the probe of the meter and flows out from the side. In addition, the upper end of the descending section 9 of the U-shaped pipe section of the flow cell is provided with an exhaust port or an emptying valve, generated gas can be discharged in time, the safety and the stability of the flow cell measurement are improved, and the pressure influence of the gas gathering of the descending section 9 of the U-shaped pipe section is avoided.
In a further preferred embodiment, a bypass line 13 is provided between the upstream of the first valve 11 and the downstream of the second valve 12, and a bypass valve 14, preferably also a shut-off valve, is provided on the bypass line 13. The bypass valve for maintenance is designed on the pipeline, when the maintenance instrument is cleaned, the bypass stop valve is opened, the front stop valve and the rear stop valve of the flow cell are closed, the instrument connecting flange is disassembled, and online maintenance and calibration can be realized.
As shown in FIG. 4, the measuring probe 6 can be screwed from the central hole of the cover plate 8 and inserted into the descending section of the U-shaped tube section of the flow cell device, preferably at 1/5-4/5, preferably 2/5-7/10, more preferably at about 2/3 of the height of the descending section.
The other components except the flange of the flow cell device can be formed in one step by casting or formed by welding in a sectional casting mode, and the materials can be stainless steel or other casting materials.
Comparative example 1
The prior art device shown in fig. 1 is adopted, which is an upward pipe section arranged on a fluid pipeline, the upper port is sealed by a flange cover plate, a pH meter is inserted into the opening of the cover plate to measure the pH of fluid (acetaldehyde refining tower feeding material, the main components are acetaldehyde, water, trace VAC and trace alkali liquor), and the measurement data has large fluctuation and fluctuates within the range of pH 6-9.
Example 1
A flow cell device for fluid parameter measurement in a pipe, comprising:
the pipeline joint comprises a first flange 1 used for being connected with an upstream pipeline 15, a second flange 2 used for being connected with a downstream pipeline 16, a first elbow 3 transversely bent from the first flange, a U-shaped pipeline section 4 with a descending section 9 connected with the first elbow, and a second elbow 5 with one end connected with an ascending section 10 of the U-shaped pipeline section and the other end connected with the second flange 2, wherein the upper end of the descending section 9 of the U-shaped pipeline section is an opening used for inserting a measuring probe 6, and the first elbow 3 is connected below the opening at the upper end of the descending section 9 of the U-shaped pipeline section.
The opening at the upper end of the descending section of the U-shaped pipe section is connected with a third flange 7.
The inner and outer diameters of the first bend 3, the U-shaped pipe section 4 and the second bend 5 are the same as those of the upstream pipe 15 and the downstream pipe 16.
The upper end of the descending section of the U-shaped pipe section is higher than the top of the joint of the first elbow and the descending section of the U-shaped pipe section and higher than the top of the second elbow, and the distance between the top of the joint of the first elbow and the descending section of the U-shaped pipe section and the upper end of the descending section of the U-shaped pipe section is 6 cm.
A third flange 7 connected with an opening at the upper end of a descending section 9 of the U-shaped pipe section is covered by a cover plate 8, and a threaded connector for the measuring probe 6 to pass through is arranged on the cover plate 8. The interface is used to mount a pH measurement probe. A sealing gasket is arranged between the cover plate 8 and the third flange, and the cover plate 8 and the third flange are fixed through bolts.
The upper end of the descending section 9 of the U-shaped pipe section is higher than the upstream pipe 15 and 6cm higher than the top of the upstream pipe 15. The height of the U-shaped pipe section is 40 cm; the width of the U-shaped pipe section, i.e. the distance between the descending and ascending sections of the U-shaped pipe section (the distance between the longitudinal axes), was 30 cm. The linear distance between the first flange and the second flange is 50 cm.
The upper parts of the first bend 3, the second bend 5 are at the same level as the upstream pipe 15 and the downstream pipe 16.
A connecting flange is arranged between an upstream pipeline and a downstream pipeline of the fluid pH value to be measured, the connecting flange is respectively connected with a first flange and a second flange of the pipeline type flow cell device, the measuring probe 6 is screwed in from a central hole of the cover plate 8 and is inserted into a descending section of a U-shaped pipe section of the flow cell device, and the position of the descending section is 2/3 in height. The fluid enters the descending section of the U-shaped pipe section from the first elbow, a mixing effect can be generated due to the redirection of the fluid at the descending section, the fluid is uniformly mixed and fully contacted with the pH meter measuring probe, the measuring result is more accurate, and then the fluid downwards reaches the horizontal section at the bottom of the U-shaped pipe and sequentially enters the ascending section of the U-shaped pipe section, the second elbow and the downstream pipeline.
The device of example 1 is installed on the fluid pipeline of comparative example 1 to replace the measuring device of comparative example 1, the device of example 1 is an on-line analysis, the pH value of the fluid is stabilized to 7 +/-0.2, and the flow cell device for measuring the fluid parameter in the pipeline, which is disclosed by the application, is proved to be obviously more consistent with the actual pH value of the material.
Example 2
The same procedure as in example 1 was repeated except that the pH measuring probe was replaced with an oxidation-reduction potential measuring probe. The upper end cover plate 8 of the descending section 9 of the U-shaped pipe section of the flow cell is provided with an exhaust port or an emptying valve so as to discharge generated gas, increase the safety and stability of the flow cell measurement and avoid the pressure influence of the gas gathering of the descending section 9 of the U-shaped pipe section.
Example 3
The same as in example 1 except that the pH measuring probe was replaced with the conductivity measuring probe.
Example 4
A flow cell device for fluid parameter measurement in a pipe, comprising:
the device comprises a first flange 1, a second flange 2, a first elbow 3 transversely bent from the first flange, a U-shaped pipe section 4 with a descending section 9 connected with the first elbow, and a second elbow 5 with one end connected with an ascending section 10 of the U-shaped pipe section and the other end connected with the second flange 2, wherein the upper end of the descending section 9 of the U-shaped pipe section is an opening for inserting a measuring probe 6, and the first elbow 3 is connected below the opening at the upper end of the descending section 9 of the U-shaped pipe section. A first valve 11 is arranged between the first flange 1 and the upstream pipe 15 and a second valve 12 is arranged between the second flange 2 and the downstream pipe 16. The first valve 11 is flanged to the first flange 1 and the upstream pipe 15, and the second valve 12 is flanged to the second flange 2 and the downstream pipe 16. The first valve 11 and the second valve 12 are both stop valves for regulating and controlling the flow rate in the pipeline, so that the flow rate in the pipeline can not be higher than 2 m/s. A bypass line 13 is arranged between the upstream side of the first valve 11 and the downstream side of the second valve 12, and a bypass valve 14 is arranged on the bypass line 13.
The opening at the upper end of the descending section of the U-shaped pipe section is connected with a third flange 7.
The inner and outer diameters of the first bend 3, the U-shaped pipe section 4 and the second bend 5 are the same as those of the upstream pipe 15 and the downstream pipe 16.
The upper end of the descending section of the U-shaped pipe section is higher than the top of the joint of the first elbow and the descending section of the U-shaped pipe section and higher than the top of the second elbow, and the distance between the top of the joint of the first elbow and the descending section of the U-shaped pipe section and the upper end of the descending section of the U-shaped pipe section is 8 cm.
The height of the U-shaped pipe section is 35 cm; the width of the U-shaped pipe section, i.e. the distance between the descending and ascending sections of the U-shaped pipe section (the distance between the longitudinal axes), was 35 cm. The linear distance between the first flange and the second flange is 60 cm.
A third flange 7 connected with an opening at the upper end of a descending section 9 of the U-shaped pipe section is covered by a cover plate 8, and the cover plate 8 is provided with a hole for a pH meter measuring probe to pass through. A sealing gasket is arranged between the cover plate 8 and the third flange, and the cover plate 8 and the third flange are fixed through bolts.
The upper end of the descending section 9 of the U-shaped pipe section is higher than the upstream pipe 15 and 8cm higher than the top of the upstream pipe 15.
The upper parts of the first bend 3, the second bend 5 are at the same level as the upstream pipe 15 and the downstream pipe 16.
The fluid to be measured enters from the upstream pipeline 15 and the first valve 11, the flow velocity in the first valve and the second valve adjusting and controlling pipeline is not higher than 2m/s, the fluid flows through the descending section of the U-shaped pipe section, a mixing effect is generated due to the redirection of the fluid at the descending section, the fluid is uniformly mixed and fully contacts with the pH meter measuring probe, the measuring result is more accurate, then the fluid downwards reaches the horizontal section at the bottom of the U-shaped pipe, and then the fluid sequentially enters the ascending section of the U-shaped pipe section, the second elbow, the second valve and the downstream pipeline. When the maintenance instrument is cleaned, the bypass stop valve is opened, the front stop valve and the rear stop valve of the flow cell are closed, the instrument connecting flange is disassembled, and online maintenance and calibration can be realized.
On the same pipeline as the comparative example 1, the device of the embodiment is used for measuring the pH value of fluid (the feeding of the acetaldehyde refining tower, and the main components are acetaldehyde, water, trace VAC and trace alkali liquor), and the pH value is stable to 7 +/-0.2 (which is consistent with the actual pH value of the whole material composition), so that the result of measuring the pH value of the fluid in the pipeline by using the flow cell device for measuring the fluid parameters in the pipeline is more accurate.
Example 5
The same procedure as in example 4 was repeated except that the pH measuring probe was replaced with an oxidation-reduction potential measuring probe.
Example 6
The same as in example 4 except that the pH meter measuring probe was replaced with the conductivity measuring probe.
While the preferred embodiments of the present invention have been described above, it should be understood that the above description is for illustrative purposes only and is not to be construed as limiting the present invention in any way. Many modifications and equivalents may be made thereto without departing from the spirit and scope of the utility model, and such modifications and equivalents are intended to be included within the scope of the utility model.
Claims (11)
1. A flow cell device for fluid parameter measurement in a conduit, comprising: a first flange (1) used for being connected with an upstream pipeline (15), a second flange (2) used for being connected with a downstream pipeline (16), a first elbow (3) transversely bent from the first flange, a U-shaped pipe section (4) communicated with the first elbow through a descending section (9), and a second elbow (5) of which one end is communicated with an ascending section (10) of the U-shaped pipe section and the other end is connected with the second flange (2), wherein the upper end of the descending section (9) of the U-shaped pipe section is provided with an opening capable of being inserted with a measuring probe (6), the first elbow (3) is communicated below an upper end opening of the descending section (9) of the U-shaped pipe section, the upper end of the descending section (9) of the U-shaped pipe section is higher than the top of the joint of the first elbow (3) and the descending section (9) of the U-shaped pipe section,
wherein, the distance between the first flange and the second flange is 20-200 cm.
2. A flow cell device according to claim 1, characterised in that a third flange (7) is connected to the opening at the upper end of the descending section (9) of the U-shaped pipe section (4); and/or
The inner and outer diameters of the first elbow (3), the U-shaped pipe section (4) and the second elbow (5) are consistent with the inner and outer diameters of the upstream pipeline (15) and the downstream pipeline (16).
3. Flow cell device according to claim 1, characterised in that the upper end of the descending section (9) of the U-shaped pipe section (4) is higher than the top of the second bend (5); and/or
The distance between the top of the joint of the first elbow (3) and the descending section (9) of the U-shaped pipe section and the upper end of the descending section (9) of the U-shaped pipe section is 4-15 cm.
4. Flow cell device according to claim 1, characterised in that the U-shaped tube section (4) has a height of 15-60 cm; the width of the U-shaped pipe section (4) is 10-40 cm.
5. A flow-through cell device according to claim 1, characterised in that the third flange (7) attached to the opening at the upper end of the descending section (9) of the U-shaped pipe section is covered by a cover plate (8), said cover plate (8) being provided with holes for the passage of the measuring probes (6); and/or
A sealing gasket is arranged between the cover plate (8) and the third flange (7), and the cover plate (8) and the third flange (7) are fixed through bolts.
6. Flow cell device according to claim 1, characterised in that the upper end of the descending section (9) of the U-shaped pipe section is higher than the upstream pipe (15) by 4-15cm above the top of the upstream pipe (15); and/or
The upper parts of the first bend (3) and the second bend (5) are at the same height level as the upstream pipe (15) and the downstream pipe (16).
7. Flow cell device according to claim 1, characterised in that a first valve (11) is arranged between the first flange (1) and the upstream pipe (15) and a second valve (12) is arranged between the second flange (2) and the downstream pipe (16).
8. A flow-through cell arrangement according to claim 7, characterised in that the first valve (11) is flanged to the first flange (1) and the upstream pipe (15), the second valve (12) is flanged to the second flange (2) and the downstream pipe (16), and both the first valve (11) and the second valve (12) are stop or gate valves.
9. Flow cell device according to claim 7, characterised in that a bypass line (13) is arranged between the upstream of the first valve (11) and the downstream of the second valve (12), the bypass line (13) being provided with a bypass valve (14).
10. Flow cell device according to claim 5, characterised in that the measuring probe (6) is screwed in from the central hole of the cover plate (8) and inserted into the descending section of the U-shaped tube section of the flow cell device at 2/5-7/10 of the height of the descending section.
11. A flow cell device according to any one of claims 1-10, characterised in that the upper end of the descending section (9) of the U-shaped pipe section (4) is provided with a vent or an emptying valve.
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| CN113884628A (en) * | 2021-10-29 | 2022-01-04 | 内蒙古双欣环保材料股份有限公司 | Flow cell device for measuring fluid parameters in pipeline |
| CN113884628B (en) * | 2021-10-29 | 2024-02-27 | 内蒙古双欣环保材料股份有限公司 | Flow cell device for measuring fluid parameters in pipeline |
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