CN214749580U - PAM solution on-line viscosity monitoring device and PAM preparation device thereof - Google Patents
PAM solution on-line viscosity monitoring device and PAM preparation device thereof Download PDFInfo
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- CN214749580U CN214749580U CN202120334103.7U CN202120334103U CN214749580U CN 214749580 U CN214749580 U CN 214749580U CN 202120334103 U CN202120334103 U CN 202120334103U CN 214749580 U CN214749580 U CN 214749580U
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Abstract
The utility model discloses a PAM solution on-line viscosity monitoring device used on a PAM preparation device and a PAM preparation device thereof, which are arranged on the PAM preparation device and comprise a sampling mechanism, an on-line viscosity monitoring mechanism and a PLC monitoring system; the sampling mechanism is arranged on the PAM preparation device and is used for extracting PAM solution in the PAM preparation device; the online viscosity monitoring mechanism is matched with the sampling mechanism and used for monitoring the PAM solution extracted by the sampling mechanism; and the PLC monitoring system is in signal connection with the online viscosity monitoring mechanism and is used for reading the viscosity data measured by the online viscosity monitoring mechanism and setting an alarm value. The utility model discloses can conveniently reform transform, only need one set of device can effectively prepare solution concentration to PAM and monitor.
Description
Technical Field
The utility model relates to a solution is gathered and viscosity monitoring technique, and more specifically says, relates to a PAM solution on-line viscosity monitoring device and PAM preparation device thereof.
Background
The precipitation process of the water treatment plant adopts a high-density precipitation tank (called high-density tank for short), and aluminum sulfate and polyacrylamide (anion, called PAM for short) as a high-molecular coagulant aid are added in the operation process to achieve the effect of strengthening coagulation and ensure that the turbidity of the precipitated water reaches the standard. The PAM powder is prepared into solution by a preparation system and added (the preparation concentration is 1.5 g/m)3) And the prepared solution is lack of a proper online detection means, so that whether the concentration is qualified or not is lack of verification. PAM solution with unqualified concentration can cause the turbidity of the effluent of the high-density pond to seriously exceed the standard, and 2-3 hours of time delay exists abnormally, so that the effluent with high turbidity can not be found in time, and no effective remedial measure exists, and the operation of the whole water preparation system is influenced.
At present, PAM (polyacrylamide) preparation and adding equipment is mature, for example: a PAM solid medicament on-line automatic preparation and feeding device disclosed in Chinese patent 201410189942.9 (hereinafter referred to as patent 1) is characterized in that a solid spiral feeding machine (10) of the PAM solid medicament on-line automatic preparation and feeding device is communicated with a variable frequency regulation solid spiral feeding machine (11) fixed on the upper part of a prefabricated mixing box (1), and a feeding machine outlet feeding mixer communicated with the prefabricated mixing box is arranged below a discharge port of the variable frequency regulation solid spiral feeding machine
(14) And the inlet pipe of the mixer for feeding materials at the outlet of the batch feeder is connected with a water inlet electromagnetic valve (9) and a water inlet flow meter (6), the inlet end of a variable-frequency adjusting screw pump (8) is communicated with the outlet end of the solution storage tank, the outlet of the variable-frequency adjusting screw pump is connected with an outlet flow meter, the water inlet flow meter, the outlet flow meter, the variable-frequency adjusting screw pump, the water inlet electromagnetic valve, a solid spiral feeding machine and the variable-frequency adjusting spiral solid batch feeder are all connected with a PLC control system of a PLC variable-frequency control cabinet (16), and the PAM medicament instantaneous flow signal fed back by the outlet flow meter in real time automatically adjusts the filling amount and the solid medicament feeding amount. The accuracy and the reliability of the PAM medicament solution filling are improved.
A PAM automatic dispensing and dosing machine disclosed in chinese patent 201420488157.9 (hereinafter referred to as patent 2), comprising a PAM dispensing tank and a PAM agent storage tank; liquid level meters are arranged in the PAM preparation tank and the PAM medicament storage tank; a stirring device, a dosing device and a water adding device are arranged above the PAM preparation tank; the lower part of the PAM preparation tank is connected with one end of a medicament lifting pump through a pipeline, and the other end of the medicament lifting pump is connected with the upper part of the PAM medicament storage tank through a pipeline; the lower part of the PAM medicament storage tank is connected with an automatic medicament feeding pump; the liquid level meter, the stirring device, the dosing device, the water adding device and the medicament lifting pump are all electrically connected with the controller. The utility model adopts the spiral feeding tank, the PAM dry powder quantity control is more accurate, and the controller controls the PAM dry powder adding quantity to be in linear proportion with the tap water flow, so as to continuously control the same liquid medicine concentration; the utility model discloses add and adopt PAM preparation tank and PAM medicament holding tank, make things convenient for the preparation and the use of PAM medicament, the not enough condition of medicament when need using can not appear.
A PAM preparation dosing device disclosed in chinese patent 201920124038.8 (hereinafter referred to as patent 3) comprises a premixing device, a dissolving device, a water distribution device and a feeding device, wherein the premixing device comprises a feeder, a material conveying pipe and a premixer, a buffer hopper is arranged inside the premixer, the buffer hopper is provided with a discharge port, a hammer capable of reciprocating up and down is arranged at the upper part of the discharge port, and the hammer is in an inverted triangle shape; an upper buffer material plate and a lower buffer material plate are obliquely arranged at the lower part of the buffer hopper, and the upper buffer material plate is arranged at the upper part of the lower buffer material plate; the water distribution device is provided with two water outlets, the two water outlets are respectively a first water outlet and a second water outlet, the first water outlet of the water distribution device is located on the lower portion of the buffer hopper, the upper portion of the buffer material plate is arranged, the second water outlet of the water distribution device is located inside the dissolving device, PAM (polyacrylamide) in the PAM preparation dosing device is not prone to agglomeration and blanking is smooth, and the preparation efficiency of the PAM preparation dosing device is effectively improved.
In the above 3 chinese patents, patent 1 adopts adjustment of the medicament flow signal to improve accuracy and reliability of PAM medicament filling; patent 2 and patent 3 adopt novel charging hopper or buffer hopper to improve PAM solution and prepare efficiency and medicament concentration, and above-mentioned 3 patents do not mention and prepare back solution concentration and how to monitor, and how to verify through the monitoring to preparing back solution concentration whether up to standard of solution concentration.
At present, the common PAM solution concentration monitoring methods include the following:
1) starch-chromium iodide process
The method can accurately measure the concentration of PAM in the colored sample containing the surfactant and dissolved crude oil, and is suitable for analyzing the effluent liquid of a core experiment and large-batch conventional samples. Iodine and amine have influence on the method, and the method has multiple reaction steps and complicated manual analysis operation.
2) Turbidity method
Sodium hypochlorite solution is commonly reacted with PAM to produce a chemical that is insoluble in water and suspended in the solution, which is then measured using a turbidimeter or spectrophotometer. The turbidity method requires a large amount of samples, and heavy metal ions and anionic surfactants interfere with the measurement result, so that the application of the method is influenced to a certain extent.
3) Fluorescence spectrophotometry
PAM is converted into amide derivatives by Hofmann rearrangement reaction, and the amide derivatives are converted into the substance capable of emitting strong light in the presence of o-phthalaldehyde and thioethanol. The method has the outstanding characteristics that trace PAM can be detected, and the method can be used for measuring anionic, cationic and nonionic polyacrylamide, and the method takes time for measurement because the rearrangement reaction is slow to carry out.
4) Molecular Size Exclusion Chromatography (SEC)
The SEC method is an analytical method integrating separation and detection into a whole to separate polymer and small molecule impurities on a chromatographic column of a certain pore size, and then measuring with an Ultraviolet (UV) detector. The SEC method has slow analysis speed and more interference factors.
5) Viscosity method
And (3) measuring the viscosity of the sample by using the known relationship between the viscosity and the concentration at a certain shear rate, and calculating the concentration by interpolation. This method requires that the viscosity change be proportional to the PAM concentration change and can only be used for systems of known composition. Variations in temperature, ionic strength, shear rate, molecular weight of PAM, degree of hydrolysis, and molecular weight distribution all affect the viscosity of the PAM solution.
6) Other methods
Such as a radioactive isotope labeling method, an organic carbon content method, a UV/visible light spectrum method, a precipitation method, a calorimetry method, an ion dissociation spectrum method, an ammonia measuring method, a polarography method, a refractive index method and the like, are time-consuming or have many limitations, and are not suitable for conventional sample analysis.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned defect that exists among the prior art, the utility model aims at providing a PAM solution on-line viscosity monitoring device and PAM prepare the device thereof, can conveniently reform transform, only need one set of device can effectively be monitored PAM preparation solution concentration.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
on one hand, the PAM solution online viscosity monitoring device for the PAM preparation device is arranged on the PAM preparation device and comprises a sampling mechanism, an online viscosity monitoring mechanism and a PLC monitoring system;
the sampling mechanism is arranged on the PAM preparation device and is used for extracting PAM solution in the PAM preparation device;
the online viscosity monitoring mechanism is matched with the sampling mechanism and used for monitoring the PAM solution extracted by the sampling mechanism;
and the PLC monitoring system is in signal connection with the online viscosity monitoring mechanism and is used for reading the viscosity data measured by the online viscosity monitoring mechanism and setting an alarm value.
Preferably, the sampling mechanism comprises a pump body and a sampling barrel;
a liquid inlet pipe, a liquid outlet pipe and a measuring platform are arranged on the sampling barrel, and the liquid inlet pipe and the liquid outlet pipe are both communicated with the PAM preparation device;
the pump body is arranged on the liquid inlet pipe.
Preferably, the liquid inlet pipe and the liquid outlet pipe are both arranged on the side wall of the sampling barrel, and the liquid inlet pipe is positioned below the liquid outlet pipe;
the measuring platform is arranged at the top of the sampling bucket.
Preferably, the measuring platform is provided with a measuring hole.
Preferably, the online viscosity monitoring mechanism is an online viscometer which comprises a viscosity monitoring rotor, a data display, a power supply input end and a data output end;
the rotor for viscosity monitoring penetrates through the measuring opening and is positioned on the measuring platform.
Preferably, the PLC monitoring system comprises a PLC module and a human-computer interaction module connected with the PLC module;
the PLC module is in signal connection with the data output end;
the PLC module is connected with the human-computer interaction module through the Ethernet.
Preferably, the data output end outputs a 4-20 mA analog signal to the PLC module.
Preferably, the human-computer interaction module is a remote monitoring computer.
Preferably, an SCADA system is pre-installed in the remote monitoring computer.
In another aspect, the PAM preparation device comprises the PAM solution online viscosity monitoring device.
The utility model provides a PAM solution on-line viscosity monitoring device and PAM preparation device thereof still has following several beneficial effect:
1) the PAM solution is sampled, measured and data transmission are matched into a whole, so that the structure, the modification and the measurement mode are simplified;
2) for PAM preparation solution with relatively fixed components, the correlation between viscosity and concentration is strong, the data reproducibility is good, PAM varieties are replaced in time, and curve fitting of viscosity and concentration can be performed independently;
3) after data transmission, viscosity data is visually presented on a remote monitoring computer, and can be further converted into concentration, and an upper limit alarm value is set;
4) the subsequent maintenance is simpler, and the fault repair is convenient;
5) the possibility of linkage of the viscosity data and the front-end configuration is kept, and the overall intelligent operation level of the system is improved.
Drawings
Fig. 1 is a schematic structural diagram of the PAM solution online viscosity monitoring apparatus of the present invention;
FIG. 2 is a schematic structural diagram of an on-line viscosity monitoring mechanism in the PAM solution on-line viscosity monitoring device of the present invention;
FIG. 3 is a schematic structural diagram of a sampling mechanism in the PAM solution online viscosity monitoring device of the present invention;
FIG. 4 is a schematic diagram of the state of data processing of the PAM solution online viscosity monitoring device of the present invention;
fig. 5 is the utility model discloses PAM solution on-line viscosity monitoring device data acquisition, transmission, the functional block diagram who reports to the police.
Detailed Description
In order to better understand the technical solution of the present invention, the following further describes the technical solution of the present invention with reference to the accompanying drawings and embodiments.
Please combine fig. 1 to show, the utility model provides an online viscosity monitoring device of PAM solution installs on PAM prepares device 100, including sampling mechanism 1, online viscosity monitoring mechanism 2 and PLC monitored control system 3.
The sampling mechanism 1 is installed on the PAM preparing apparatus 100, and is configured to continuously extract the PAM solution prepared in the PAM preparing apparatus 100 to the sampling mechanism 1.
The online viscosity monitoring mechanism 2 is located above the sampling mechanism 1 and used for monitoring the viscosity data of the PAM solution extracted by the sampling mechanism 1 in real time on line.
The PLC monitoring system 3 is in signal connection with the online viscosity monitoring mechanism 2 and is used for reading viscosity data measured by the online viscosity monitoring mechanism 2 and setting an alarm value.
Referring to fig. 2, the online viscosity monitoring mechanism 2 is an online viscometer including a viscosity monitoring rotor 201, a data display 202, a power input terminal, and a data output terminal.
The viscosity monitoring rotor 201 passes through the measurement opening 106 and is positioned on the measurement platform 105.
The stepping motor is driven by high subdivision to drive a sensor pointer, and the rotor 201 for viscosity monitoring is driven to rotate through the balance spring and the rotating shaft. If the rotor 201 for viscosity monitoring is not subjected to the resistance of the PAM solution in the sampling mechanism 1, the sensor pointer of the balance spring and the sensor pointer of the stepping motor are at the same position; on the contrary, if the viscosity monitoring rotor 201 is subjected to the resistance of the PAM solution in the sampling mechanism 1, the balance spring generates a torque and counterbalances the viscous resistance, and finally reaches an equilibrium. This is to perform data processing to the PLC module 301 through output signals of the data output terminals, respectively, and to display the viscosity value (mPa · s) of the PAM solution on the data display 202 having the night vision function.
As shown in fig. 3, the sampling mechanism 1 includes a pump body 101 and a sampling barrel 102.
The side wall of the sampling barrel 102 is connected with a liquid inlet pipe 103, a liquid outlet pipe 104 and a measuring platform 105, and the liquid inlet pipe 103 and the liquid outlet pipe 104 are both communicated with the PAM preparation device 100.
The pump body 101 is installed on the feed liquor pipe 103 for draw PAM solution prepared in the PAM preparation device 100 in real time and enter the sampling bucket 102, and the PAM solution in the sampling bucket 102 is kept updated.
The liquid inlet pipe 103 is located below the liquid outlet pipe 104 and used for keeping the liquid level balance of the PAM solution to be measured and dynamically replacing the PAM solution.
The measuring platform 105 is located at the top of the sampling barrel 102, and the measuring platform 105 is provided with a measuring opening 106 for providing the arrangement of the on-line viscometer and the extension of the rotor 201 for viscosity monitoring into the PAM solution to be measured.
Referring to fig. 4, the PLC monitoring system 3 includes a PLC module 301 and a human-computer interaction module 302 connected thereto.
Through the data output end in the online viscosity monitoring mechanism 2, an analog signal is output to the analog input module of the PLC module 301 through 4-20 mA of the data output end, and after internal operation of the PLC module 301, the analog signal is finally transmitted to the human-computer interaction module 302 through the Ethernet. The human-computer interaction module 302 selects a remote monitoring computer, an SCADA system is pre-installed in the remote monitoring computer, and the SCADA system is displayed on the remote monitoring computer in real time through background programming and records curves in real time.
Referring to fig. 5, after the on-line viscosity monitoring mechanism 2 collects the signal, an alarm value is set by the SCADA system, and once the set value is triggered during the real-time measurement process, the alarm is performed by popping up the frame on the remote monitoring computer.
It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as limitations of the present invention, and that changes and modifications to the above described embodiments will fall within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (10)
1. The utility model provides a PAM solution on-line viscosity monitoring device, locates on PAM prepares the device, its characterized in that: the device comprises a sampling mechanism, an online viscosity monitoring mechanism and a PLC monitoring system;
the sampling mechanism is arranged on the PAM preparation device and is used for extracting PAM solution in the PAM preparation device;
the online viscosity monitoring mechanism is matched with the sampling mechanism and used for monitoring the PAM solution extracted by the sampling mechanism;
and the PLC monitoring system is in signal connection with the online viscosity monitoring mechanism and is used for reading the viscosity data measured by the online viscosity monitoring mechanism and setting an alarm value.
2. The PAM solution online viscosity monitoring device of claim 1, wherein: the sampling mechanism comprises a pump body and a sampling barrel;
a liquid inlet pipe, a liquid outlet pipe and a measuring platform are arranged on the sampling barrel, and the liquid inlet pipe and the liquid outlet pipe are both communicated with the PAM preparation device;
the pump body is arranged on the liquid inlet pipe.
3. The PAM solution online viscosity monitoring device of claim 2, wherein: the liquid inlet pipe and the liquid outlet pipe are both arranged on the side wall of the sampling barrel, and the liquid inlet pipe is positioned below the liquid outlet pipe;
the measuring platform is arranged at the top of the sampling bucket.
4. The PAM solution online viscosity monitoring device of claim 3, characterized in that: and the measuring platform is provided with a measuring hole.
5. The PAM solution online viscosity monitoring device of claim 4, characterized in that: the online viscosity monitoring mechanism adopts an online viscometer which comprises a rotor for viscosity monitoring, a data display, a power supply input end and a data output end;
the rotor for viscosity monitoring penetrates through the measuring opening and is positioned on the measuring platform.
6. The PAM solution online viscosity monitoring device of claim 5, characterized in that: the PLC monitoring system comprises a PLC module and a human-computer interaction module connected with the PLC module;
the PLC module is in signal connection with the data output end;
the PLC module is connected with the human-computer interaction module through the Ethernet.
7. The PAM solution online viscosity monitoring device of claim 6, wherein: and the data output end outputs 4-20 mA analog signals to the PLC module.
8. The PAM solution online viscosity monitoring device of claim 6, wherein: the human-computer interaction module adopts a remote monitoring computer.
9. The PAM solution online viscosity monitoring device of claim 8, wherein: and an SCADA system is preinstalled in the remote monitoring computer.
10. A PAM prepares device which characterized in that: comprising an on-line viscosity monitoring device for PAM solutions according to any of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120334103.7U CN214749580U (en) | 2021-02-05 | 2021-02-05 | PAM solution on-line viscosity monitoring device and PAM preparation device thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120334103.7U CN214749580U (en) | 2021-02-05 | 2021-02-05 | PAM solution on-line viscosity monitoring device and PAM preparation device thereof |
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| CN214749580U true CN214749580U (en) | 2021-11-16 |
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| CN202120334103.7U Active CN214749580U (en) | 2021-02-05 | 2021-02-05 | PAM solution on-line viscosity monitoring device and PAM preparation device thereof |
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