CN215931744U - Online pH detection device for high-viscosity flowing solid-liquid mixture - Google Patents
Online pH detection device for high-viscosity flowing solid-liquid mixture Download PDFInfo
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- CN215931744U CN215931744U CN202121678249.XU CN202121678249U CN215931744U CN 215931744 U CN215931744 U CN 215931744U CN 202121678249 U CN202121678249 U CN 202121678249U CN 215931744 U CN215931744 U CN 215931744U
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Abstract
The utility model relates to an on-line pH detection device for a high-viscosity flowing solid-liquid mixture, which is arranged on the side wall of a reaction kettle and comprises a supporting part, a sleeve, a pH meter and a cleaning pipe; the supporting part is detachably connected with the side wall of the reaction kettle; the pH meter is fixed in the sleeve, the sleeve and the cleaning pipe penetrate through and are fixedly connected to the supporting part, the sleeve is positioned at one end of the supporting part, which is far away from the reaction kettle, and is detachably connected with the pH meter, and the other end of the sleeve penetrates through the supporting part and then extends into the reaction kettle; the one end that the scavenge pipe is located outside the reation kettle is linked together with the pumping installations of washing liquid, and the other end of scavenge pipe passes the supporting part and stretches into inside and the sleeve pipe intercommunication of reation kettle for the washing liquid can wash the electrode probe of pH meter. The device has the advantages that the device can carry out on-line detection on the high-viscosity flowing solid-liquid mixture, and is convenient for the accurate control of chemical production.
Description
Technical Field
The utility model relates to the technical field of chemical production equipment, in particular to an online pH detection device for a high-viscosity flowing solid-liquid mixture.
Background
In chemical production, in order to control the reaction state in time, some online detection or control equipment need to be installed and communicated with the control module of the main body, so that the efficiency of chemical production and the intelligent control of product quality are improved. Generally speaking, continuous measurement for chemical engineering process needs to have not only measurement display function, but also control, calibration, anti-interference and other problems.
In the existing production process of the water-soluble brightener, the reaction progress and the reaction end point control are often judged according to the pH change of a reaction system. During production, a stage of reaction is carried out under the condition of adding ice at the temperature of-1-0 ℃, a large amount of ice blocks are added before the reaction starts, stirring is continuously carried out during the reaction process, liquid alkali is dropwise added, the viscosity of system materials can be changed greatly along with the reaction, the system materials are changed into a high-viscosity reaction intermediate product from a complete aqueous solution, the viscosity is 8000-40000 cps, the generated intermediate product is a slightly water-soluble substance, the reaction system is in a state of coexistence of ice, water and the reaction intermediate substance, and the reaction system is continuously stirred to form a high-viscosity flowing solid-liquid mixture, which is also called as flowing slurry. From the beginning of the reaction, the liquid alkali was added continuously, and the end of the reaction was considered when the pH was 10. The detection span of the pH value in the whole production process is from 1 to 11, and higher requirements are made on production control. The existing pH control means is that manual sampling is carried out, then testing is carried out, a test result is fed back to production operation workers, and the next operation is carried out, so that the problem exists that the feedback hysteresis is detected, and therefore, the production operation usually needs experienced operation workers, the control of the reaction needs to be pre-judged, but errors exist; in order to improve the control effect, the synchronous contrast control of primary judgment of a reaction liquid obtained on site by using a precise pH test paper and test judgment of an instrument after sampling is often utilized, but the judgment error of the pH test paper on a sample with high viscosity is larger, the precision is not high, and the operation is original and unsafe; which is not conducive to precise control of the reaction.
The existing on-line pH control device has two installation modes of a flow type and a submersion type. On-line pH is generally used for measuring liquid with low viscosity, and when the viscosity of the liquid is high, the problems that a sample is adhered to the surface of an electrode and cannot be accurately measured or the response time is long occur. An electrode probe of the existing pH meter is thin in a glass electrode ball bubble film, hard objects cannot collide with the glass bulb, flowing ice blocks exist in the reaction environment of the water-soluble whitening agent, and the electrode is directly impacted by the ice blocks and cannot directly perform on-line detection on the pH value.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
In view of the above disadvantages and shortcomings of the prior art, the present invention provides an online pH detection device for a high viscosity flowing solid-liquid mixture, which solves the technical problems that in the prior art, a glass electrode cannot be directly used for pH detection of a high viscosity flowing solid-liquid mixture and a high viscosity material is adhered on the surface of the electrode and is not easy to remove, thereby affecting the measurement accuracy.
(II) technical scheme
In order to achieve the purpose, the utility model adopts the main technical scheme that:
the embodiment of the utility model provides an online pH detection device for a high-viscosity flowing solid-liquid mixture, which is arranged on the side wall of a reaction kettle and comprises a supporting part, a sleeve, a pH meter and a cleaning pipe;
the supporting part is detachably connected with the side wall of the reaction kettle; the pH meter is fixed in the sleeve, the sleeve and the cleaning pipe penetrate through and are fixedly connected to the supporting part, the sleeve is positioned at one end of the supporting part, which is far away from the reaction kettle, and is detachably connected with the pH meter, and the other end of the sleeve penetrates through the supporting part and then extends into the reaction kettle; the one end that the scavenge pipe is located outside the reation kettle is linked together with the pumping installations of washing liquid, and the other end of scavenge pipe passes the supporting part and stretches into inside and the sleeve pipe intercommunication of reation kettle for the washing liquid can wash the electrode probe of pH meter.
According to the online pH detection device provided by the embodiment of the utility model, the pH meter is fixed in the sleeve, and the sleeve is used for protecting a glass electrode of the pH meter and preventing flowing ice blocks from directly impacting the glass electrode to play a role in protection; one end of the sleeve, which is positioned outside the supporting part, is detachably connected with the pH meter, so that the electrode of the pH meter can be conveniently checked and corrected and periodically detected, and the pH meter can be detached after the reaction kettle is emptied for cleaning and infiltration protection, thereby preventing the electrode from being dried to influence the service life; sleeve pipe and supporting part fixed connection improve sheathed tube shock resistance stability, and the scavenge pipe can utilize the washing liquid, will adhere to the high viscosity material above the electrode and wash, satisfies the test needs to the material of high viscous flow solid-liquid mixture, in time lets new detection material replace the material that has tested, improves the accuracy and the response speed of test.
Optionally, the supporting part is a flange, and the flange is connected with the side wall of the reaction kettle through bolts or clamps.
All set up sleeve pipe and scavenge pipe on the supporting part, the connection dismantled of flange is convenient for whole check out test set change and maintenance.
Optionally, the inclination angle of the pH meter and the horizontal direction is larger than 15 degrees, so that the bulb is filled with the internal reference solution, no air bubbles exist, and the potential stability of the bulb is ensured.
Optionally, the online pH detection device further comprises a horizontal tube, the horizontal tube is located inside the reaction kettle, one end of the horizontal tube is communicated with one end of the sleeve extending into the reaction kettle, a port at the other end of the horizontal tube is plugged, a liquid collecting tank for containing liquid is formed in an opening in the upper surface of the horizontal tube, and the electrode probe is located inside the liquid collecting tank.
Due to the existence of the liquid collecting tank, the liquid of the high-viscosity flowing solid-liquid mixture to be tested can be better collected, so that the test is convenient; on the other hand, the existence of the liquid collecting groove can keep the electrode probe with pH in a wetting state all the time without being damaged.
Optionally, the depth of the sump is higher than the immersion depth of the pH meter electrode probe. Therefore, on one hand, small ice blocks in the horizontal direction can be prevented from impacting the glass probe of the working electrode, and on the other hand, the electrode is fully soaked, so that the normal work of the electrode can be ensured, and the electrode is convenient to wash and soak.
Optionally, the cleaning tube is communicated with the liquid collecting tank through a cleaning nozzle, and the nozzle head penetrates through the side wall of the horizontal tube and is arranged corresponding to the electrode probe. The design can effectively clean and prevent reaction materials from adhering to the electrode probe.
Optionally, the nozzles are located on the side wall of the horizontal tube facing the side of the high viscosity flowing solid-liquid mixture. Considering that the cleaning nozzle faces the high viscosity liquid and the ice block, the nozzle is positioned at the side facing the high viscosity flowing material, and the water sprayed out of the cleaning pipe is along the flowing direction of the reaction material, thus, the requirement on the pressure of the water is greatly reduced, the control is easy, if the cleaning nozzle is sprayed out against the flowing direction of the reaction material, the resistance brought by the flowing direction of the material needs to be overcome, and the cleaning pressure needs to be very large, which is not beneficial to the control.
Optionally, the cleaning pipe is in threaded connection with the cleaning nozzle, and the ratio of the inner diameter of the cleaning nozzle to the inner diameter of the cleaning pipe is 1: 4-6. The reducing treatment can improve the pressure at the nozzle and improve the cleaning effect.
Optionally, the cleaning solution is pure water with pressure of 0.25-0.5 MPa.
On one hand, the glass electrode probe of the pH meter can be cleaned and is consistent with a water phase system of the reaction, and by-products and useless substances are not increased; on the other hand, pure water is used as a soaking liquid, so that the hydrated gel layer of the bulb is prevented from being damaged by a dry environment.
Optionally, the cleaning tube is a full body threaded tube. The cleaning tube adopts a whole body thread, which is convenient for adjusting the cleaning of electrodes with various angles and specifications.
The sleeve is made of stainless steel S31603 or polytetrafluoroethylene plastic. The high-strength material can protect the glass electrode from being directly impacted by ice blocks, and also can resist acid and alkali and has good corrosion resistance.
(III) advantageous effects
The utility model has the beneficial effects that: according to the on-line pH detection device for the high-viscosity flowing solid-liquid mixture, the pH meter is protected inside the sleeve by the sleeve, so that a glass electrode is protected from being impacted by ice blocks; the pH meter is detachably connected with the sleeve, so that periodic detection is facilitated; washing off the high-viscosity materials adhered to the glass electrode by using the scouring force of the cleaning solution; the liquid collecting tank is designed to prevent the dry environment from damaging the hydrated gel layer of the bulb and improve the phenomenon that materials are easy to agglomerate; compared with the prior art, the online pH detection device can realize online pH detection of high-viscosity flowing solid-liquid mixtures, achieves the purpose of online detection, can quickly respond, and is favorable for accurate control of chemical production.
Drawings
FIG. 1 is a schematic front view of an embodiment of an on-line pH detection device for a high viscosity flowing solid-liquid mixture according to the present invention;
FIG. 2 is a schematic top sectional view of an embodiment of the device for on-line pH detection of a high viscosity flowing solid-liquid mixture according to the present invention.
[ description of reference ]
1: a support portion;
11: side wall of reaction kettle
2: a sleeve;
21: a horizontal tube;
22: a liquid collecting tank;
3: a pH meter;
31: an electrode probe;
4: cleaning the tube;
41: and (5) cleaning the nozzle.
Detailed Description
For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings. As used herein, the terms "inner," "outer," "upper," and "lateral" are used with reference to the orientation of FIG. 1. The side of the reactor side wall in contact with the reactants is referred to as "inside" and the side of the reactor side wall in contact with the natural environment is referred to as "outside".
The online pH detection device for the high-viscosity flowing solid-liquid mixture, provided by the embodiment of the utility model, solves the problem that the existing pH detection device cannot perform online detection on the high-viscosity flowing solid-liquid mixture through the design of the protective sleeve, the horizontal pipe and the cleaning pipe, and meanwhile, due to the cleaning effect of the cleaning pipe, materials adhered to an electrode probe can be removed, the response is fast, and the detection accuracy is improved.
In order to better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the utility model are shown in the drawings, it should be understood that the utility model can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.
Example (b):
referring to fig. 1 and 2, an online pH detection device for a high viscosity flowing solid-liquid mixture is installed on a side wall 11 of a reaction kettle, and comprises a support part 1, a sleeve 2, a pH meter 3 and a cleaning pipe 4;
the supporting part 1 is detachably connected with the side wall 11 of the reaction kettle; the pH meter 3 is fixed in the sleeve 2, the inclination angle of a glass electrode of the pH meter 3 and the horizontal direction is more than 15 degrees, and an electrode bulb is filled with an internal reference solution to ensure the potential stability; the sleeve 2 and the cleaning pipe 4 are both penetrated and fixedly connected to the supporting part 1, wherein the supporting part 1 is a connecting flange, and the sleeve 2 and the connecting flange are in welded connection, so that the stability of the sleeve 2 can be improved, and the shaking of the sleeve 2 caused by the impact of ice blocks is reduced; one end of the sleeve 2 extending into the reaction kettle is communicated with one end of the horizontal pipe 21, the port of one end of the horizontal pipe 21 extending into the reaction materials is blocked, the upper surface of the horizontal pipe is provided with a hole, and a liquid collecting tank 22 for collecting test liquid is formed inside the horizontal pipe 21; one end of the sleeve 2, which is positioned outside the supporting part and is far away from the reaction kettle, is detachably connected with the pH meter 3, and an electrode probe 31 of the pH meter 3 extends into the liquid collecting tank 22; the pH meter 3 is detachably connected with the sleeve 2, so that the pH meter 3 can be conveniently calibrated, maintained and replaced in the using process; one end of the cleaning tube 4 is communicated with a pumping device of the cleaning liquid, and the other end of the cleaning tube 4 penetrates through the supporting part 1 to extend into the reaction kettle to be communicated with the horizontal tube 21, so that the cleaning liquid can clean the electrode probe 31 of the pH meter 3.
The cleaning pipe 4 is detachably connected with the connecting flange through threads, and a sealing ring is arranged between a nut on the cleaning pipe 3 and the connecting flange for improving the sealing performance.
The cleaning pipe 4 is a through-body threaded pipe, the cleaning pipe 4 is communicated with the side wall of the horizontal pipe 21 through a cleaning nozzle 41, the nozzle 41 is positioned on one side facing the high-viscosity flowing solid-liquid mixture, and the cleaning pipe 4 is fixedly connected with the cleaning nozzle 41; one end of the cleaning nozzle 41 extending into the liquid collecting tank 22 is arranged corresponding to the electrode probe 31; the horizontal pipe 21 is fixedly connected with the cleaning nozzle 41, the ratio of the inner diameter of the cleaning nozzle 41 to the inner diameter of the cleaning pipe 4 is 1:5, the diameter is changed, the flowing speed of cleaning liquid can be improved, the scouring effect is improved, and high-viscosity materials can be well removed from the surface of the electrode probe 31; the cleaning tube 4 is a through-body threaded tube, can adjust the bending angle of the cleaning tube, and is suitable for cleaning electrode probes of various specifications.
The depth of the liquid collecting groove 22 is higher than the infiltration depth of the electrode probe 31, so that the stability of the electrode probe can be ensured during working, and the direct impact of small ice blocks can be prevented; in addition, after the materials in the reaction kettle are emptied, enough cleaning liquid can be stored, and when the cleaning liquid is pure water, the pure water can be used as a soaking liquid, so that the phenomenon that the hydration gel layer of the bulb is damaged by a dry environment and the phenomenon that the materials are easy to agglomerate is prevented. Avoid influencing and measure once more, improve life.
The sleeve 2 is made of stainless steel S31603, so that the mechanical strength can be kept better, on the other hand, the sleeve is acid-resistant and alkali-resistant, the sleeve is suitable for the change of the pH value of a system from 1 to 11 in the production process of the liquid brightener, the temperature of the reaction system is from minus 1 ℃ to the highest reaction temperature of 95 ℃, and the material has better stability.
The pressure of the pure water is adjustable within 0.25-0.5MPa, and the cleaning agent can adapt to the cleaning of materials with changed system viscosity.
Tests prove that the cleaning effect is better when the ratio of the inner diameter of the cleaning nozzle 41 to the inner diameter of the cleaning pipe 4 is 1:4 or 1:6 under the same conditions.
The detection device of the utility model has the following working procedures:
when the liquid whitening agent is produced, adding ice blocks into materials in a reaction kettle, then carrying out reaction, starting a pH meter 3, carrying out continuous test on the pH value, flushing the electrode probe 31 once every 15 minutes by using pure water as a cleaning solution according to the requirement of production control, wherein the cleaning water pressure is adjustable at 0.25-0.5MPa, and when the pH value is 10 according to the change of a pH value test value, the reaction reaches the end point; after the material is discharged, pure water is injected into the liquid collecting tank 22 by the cleaning pipe 4 to clean the material to be neutral, and the liquid collecting tank is filled with pure water to keep the electrode probe moist. When the calibration is needed, the pH meter 3 is detached and taken out for adjustment.
In the present invention, unless otherwise expressly stated or limited, the terms "in communication with," "connected to," "secured to," and the like are to be construed broadly, e.g., as meaning permanently connected to, removably connected to, or integral with; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; either as communication within the two elements or as an interactive relationship of the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are illustrative and not restrictive, and that those skilled in the art may make changes, modifications, substitutions and alterations to the above embodiments without departing from the scope of the present invention.
Claims (10)
1. An on-line pH detection device for a high-viscosity flowing solid-liquid mixture is arranged on the side wall (11) of a reaction kettle and is characterized by comprising a supporting part (1), a sleeve (2), a pH meter (3) and a cleaning pipe (4);
the supporting part (1) is detachably connected with the side wall (11) of the reaction kettle; the pH meter (3) is fixed in the sleeve (2), the sleeve (2) and the cleaning pipe (4) penetrate through and are fixedly connected to the supporting part (1), the sleeve (2) is positioned at one end, far away from the reaction kettle, of the supporting part (1) and is detachably connected with the pH meter (3), and the other end of the sleeve (2) penetrates through the supporting part (1) and then extends into the reaction kettle; one end of the cleaning pipe (4) located outside the reaction kettle is communicated with a pumping device of the cleaning liquid, and the other end of the cleaning pipe (4) penetrates through the supporting part (1) to stretch into the reaction kettle and is communicated with the sleeve (2), so that the electrode probe (31) of the pH meter (3) can be cleaned by the cleaning liquid.
2. The apparatus for the on-line detection of pH of a flowing solid-liquid mixture with high viscosity according to claim 1, wherein the support part (1) is a flange, and the flange is bolted or clamped to the side wall (11) of the reaction vessel.
3. The apparatus for the on-line measurement of pH of a flowing solid-liquid mixture with high viscosity according to claim 1, wherein the inclination angle of the pH meter (3) to the horizontal is > 15 °.
4. The on-line pH detection device for the high-viscosity flowing solid-liquid mixture as claimed in claim 1, further comprising a horizontal tube (21), wherein the horizontal tube (21) is positioned inside the reaction kettle, one end of the horizontal tube (21) is communicated with one end of the sleeve (2) extending into the reaction kettle, the other end port of the horizontal tube (21) is blocked, an upper surface opening of the horizontal tube (21) forms a liquid collecting tank (22) for containing liquid, and the electrode probe (31) is positioned inside the liquid collecting tank (22).
5. The apparatus for on-line pH measurement of a high viscosity flowing solid-liquid mixture according to claim 4 wherein the depth of the sump (22) is higher than the immersion depth of the electrode probe (31).
6. The on-line pH detecting device for high viscosity flowing solid-liquid mixture according to claim 4, wherein the cleaning tube (4) is communicated with the liquid collecting tank (22) through a cleaning nozzle (41), and the head of the nozzle (41) is arranged through the side wall of the horizontal tube (21) corresponding to the electrode probe (31).
7. The apparatus for the on-line detection of pH of a flowing solid-liquid mixture with high viscosity according to claim 6 wherein said nozzle (41) is located on the side wall of the horizontal pipe (21) facing the flowing solid-liquid mixture with high viscosity.
8. The on-line pH detecting device for high viscosity flowing solid-liquid mixture according to claim 4, characterized in that the cleaning pipe (4) is in threaded connection with the cleaning nozzle (41), and the ratio of the inner diameter of the cleaning nozzle (41) to the inner diameter of the cleaning pipe (4) is 1: 4-6.
9. The apparatus for on-line detection of pH of a high viscosity flowing solid-liquid mixture according to claim 1, wherein the cleaning liquid is pure water with a pressure of 0.25 to 0.5 MPa.
10. The on-line pH detecting device for high viscosity flowing solid-liquid mixture as claimed in claim 1, wherein the cleaning tube (4) is a through-body screw tube.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121678249.XU CN215931744U (en) | 2021-07-22 | 2021-07-22 | Online pH detection device for high-viscosity flowing solid-liquid mixture |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121678249.XU CN215931744U (en) | 2021-07-22 | 2021-07-22 | Online pH detection device for high-viscosity flowing solid-liquid mixture |
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| CN215931744U true CN215931744U (en) | 2022-03-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115015344A (en) * | 2022-06-06 | 2022-09-06 | 安徽维德工业自动化有限公司 | System and method for full-automatic measurement of pH of suspended reaction liquid in reaction kettle |
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2021
- 2021-07-22 CN CN202121678249.XU patent/CN215931744U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115015344A (en) * | 2022-06-06 | 2022-09-06 | 安徽维德工业自动化有限公司 | System and method for full-automatic measurement of pH of suspended reaction liquid in reaction kettle |
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