Rapid scaling evaluation device and method

Abstract

The invention discloses a rapid scaling evaluation device and method.The rapid scaling evaluation device comprises a filtering device and further comprises a scaling monitoring module, and the scaling monitoring module comprises a scaling monitoring device, a scaling monitor and a corrosion monitor; a scaling monitoring probe is arranged on the scaling monitoring device, and a scaling induction electrode and a scaling indication electrode are arranged in the scaling monitoring probe; the scaling monitoring probe is connected with the scaling monitor and the corrosion monitor through cables, and the filtering device is communicated with the scaling monitoring device through a first pipeline. The device can be directly connected to an oil field on-site process to directly measure the scaling index of a medium in a pipeline, so that the test result deviation caused by oxygen exposure and CO2 and H2S leakage of a sample in the process of sampling to a laboratory is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of oilfield water quality detection, and specifically to a scale formation rapid evaluation device and method. Background Art

[0002] In the production process of the petroleum and petrochemical industries, metal materials often undergo chemical and electrochemical interactions with the surrounding environment during service, resulting in scale formation problems. Among them, the special environment of oil and gas transportation pipelines will generate gases such as CO 2 、H 2 S, etc., and there is also the deposition of microbial sand scale, thus forming a scale formation problem in a complex medium environment, leading to the failure of oil and gas transportation pipelines.

[0003] Publication No.: CN107991356B discloses an on-line scale formation monitoring device for oilfield injection pipelines, including a scale formation monitoring controller and an on-line scale formation monitoring sensor. The scale formation monitoring controller includes a current amplifier, a power amplifier, a main polarization circuit, two sine wave generators, two potential current signal data collectors, a communication interface, a power supply module, and an MCU controller. The on-line scale formation sensor is connected to the power amplifier and the current amplifier through two cable lines. The on-line scale formation monitoring sensor is mainly assembled by two metal wire electrodes, a stainless steel support column, a porous ceramic tube, a heating wire, a polytetrafluoroethylene oil-proof cover, a polytetrafluoroethylene oil-proof housing, and a core aviation plug. The on-line scale formation sensor is connected to the power amplifier and the current amplifier through two cable lines. The invention has the effect of real-time on-line monitoring, can timely adjust the formula and concentration of scale inhibitors, prevent pipeline scale formation, and has the ability to resist electromagnetic interference and AC interference, improving the stability and reproducibility of measurement results.

[0004] This prior art does not have an induction ability, requires a long detection time, and cannot detect quickly.

[0005] Publication No.: CN113433178A discloses an ion concentration monitoring system and method. A reference liquid pool is introduced into the system. The reference liquid pool stores the liquid at the initial stage of ion concentration monitoring, which is called the reference liquid. Each time calibration is performed, the sensor group measures the ion concentration of the reference liquid, compares the monitored concentration data with the reference data and the standard data to obtain calibration data, and the sensor group can be accurately calibrated using the calibration data.

[0006] This prior art cannot be quickly deployed at the well site and is not suitable for use at the well site.

[0007] Publication number: CN106404858B discloses a test device for studying the scaling process of substances in water, including a water circulation pump, a water circuit module, a dissolved air tank, and a test water tank. Its scale can be adjusted according to different research contents, with a simple structure and convenient installation. During the test, the composition of the test liquid can be adjusted at any time according to the test content, accelerating the test research speed. Meanwhile, the water quality change, the electrochemical reaction speed, or the scaling speed can be monitored at any time. Moreover, the content of the test research itself can be adjusted at any time, and the conceivable solutions can be added to the device for test verification. The test process is more flexible and it is convenient to modify the test content at any time. It provides a strong support and foundation for the research on descaling of the converter valve electrode.

[0008] This prior art cannot be quickly deployed at the well site and is not suitable for use at the well site.

[0009] In summary, the technical solutions, the technical problems to be solved, and the beneficial effects of the above-disclosed technologies are all different from those of the present invention. Regarding more technical features, the technical problems to be solved, and the beneficial effects of the present invention, there is no technical inspiration in the above-disclosed technical documents. Summary of the Invention

[0010] Aiming at the above-mentioned defects existing in the prior art, the purpose of the present invention is to provide a rapid scaling evaluation device and method, which directly monitor and detect the scaling state of the inner water sample of the oilfield metal pipeline.

[0011] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0012] A rapid scaling evaluation device includes a filtering device and a scaling monitoring module. The scaling monitoring module includes a scaling monitoring device, a scaling monitor, and a corrosion monitor. A scaling monitoring probe is provided on the scaling monitoring device, and a scaling induction electrode and a scaling indicating electrode are provided in the scaling monitoring probe. The scaling monitoring probe is connected to the scaling monitor and the corrosion monitor through a cable. The filtering device is communicated with the scaling monitoring device through a first pipeline.

[0013] Furthermore, it also includes a sampling tube and a sample outlet tube;

[0014] Specifically, a solenoid valve and a water pump are provided on the sampling tube. The sampling tube is provided with a sampling port and is communicated with the filtering device;

[0015] Specifically, the sample outlet tube is provided with a sample outlet and is communicated with the scaling monitoring device;

[0016] Specifically, quick-connect interfaces are provided at both the sampling port and the sample outlet, which is convenient for installation.

[0017] Further, a liquid level sensor is provided inside the scaling monitoring device for water level monitoring;

[0018] Specifically, NPT interfaces are provided on the scaling monitoring device for installing scaling monitoring probes;

[0019] Specifically, the sample inlet pipe, the sample outlet pipe, and the first pipeline are all steel wire hoses;

[0020] Specifically, the scaling monitoring device is a tank body, and the filtering device is composed of at least one filtering tank.

[0021] Further, the filtering device and the scaling monitoring module are both arranged in the cabinet;

[0022] Specifically, the cabinet is provided with an upper cover. The scaling monitor and the corrosion monitor are arranged in the upper cover, and a switching power supply, a controller, and a main control board are also arranged in the upper cover;

[0023] Specifically, the scaling monitor, the corrosion monitor, and the main control board are all connected to the controller, and the main control board is connected to the water pump and the solenoid valve;

[0024] Specifically, the controller can receive the monitoring data of the scaling monitor and the corrosion monitor, and can control the start and stop of the water pump and the solenoid valve through the main control board;

[0025] Specifically, the controller and the main control board obtain power from the switching power supply.

[0026] Further, the upper cover is also provided with a control panel, and a touch screen, a screen switch, a power switch, and a communication interface are arranged on the control panel;

[0027] Specifically, the touch screen and the communication interface are both connected to the controller, and the touch screen obtains power from the switching power supply;

[0028] Specifically, the power switch controls the power-on state of the switching power supply, and the screen switch controls the power-on state of the touch screen;

[0029] Specifically, a pressure gauge is arranged on the front of the cabinet, and the pressure gauge is connected to the sample inlet pipe to indicate the pressure of the sample inlet pipe;

[0030] Specifically, a lead-acid battery is arranged inside the cabinet, and the lead-acid battery is connected to the switching power supply;

[0031] Specifically, the upper cover is provided with a power interface, and the power interface is connected to the switching power supply.

[0032] Further, the upper cover is provided with an upper cover door lock, a handle is installed on the side of the cabinet, shock-absorbing wheels are installed at the bottom of the cabinet, and a hydraulic pneumatic spring is arranged inside the upper cover, and the hydraulic pneumatic spring is connected to the upper end of the cabinet.

[0033] Further, the scale formation monitoring probe includes a aviation plug, a probe housing, a adapter, a scale formation induction electrode, a scale formation indication electrode, an auxiliary electrode, a reference electrode and an oil-proof cover;

[0034] Specifically, the aviation plug is arranged at the upper end of the probe housing, the oil-proof cover is arranged at the lower end of the probe housing, the adapter is arranged on the outer wall of the probe housing, and the scale formation induction electrode, the scale formation indication electrode, the auxiliary electrode and the reference electrode are inserted into the probe housing from inside the oil-proof cover and connected to the aviation plug.

[0035] Further, an insulating resin is used to isolate between the scale formation induction electrode and the auxiliary electrode;

[0036] Specifically, two scale formation indication electrodes are provided, and one scale formation induction electrode, one auxiliary electrode and one reference electrode are provided;

[0037] Specifically, the auxiliary electrode and the reference electrode are made of stainless steel, and the scale formation indication electrode and the scale formation induction electrode are made of carbon steel;

[0038] Specifically, the scale formation indication electrode is needle-shaped and is arranged at the center of the scale formation induction electrode.

[0039] Further, all electrodes are connected to the aviation plug through wires inside the probe housing;

[0040] Specifically, a temperature sensor is further arranged inside the housing, and the temperature sensor is connected to the aviation plug through a wire inside the housing;

[0041] Specifically, the hollow part of the housing is filled with insulating sealant.

[0042] Further, there are two scale formation monitoring devices, which are divided into a first scale formation monitoring device and a second scale formation monitoring device; there are two sampling pipes, which are divided into a first sampling pipe and a second sampling pipe;

[0043] Specifically, the first sampling pipe is provided with a first sampling port, the second sampling pipe is provided with a second sampling port, the first sampling pipe and the second sampling pipe are respectively communicated with the filtering device, and electromagnetic valves and water pumps are arranged on both the first sampling pipe and the second sampling pipe;

[0044] Specifically, the sampling pipe is communicated with the first scale formation monitoring device and the second scale formation monitoring device through a tee joint;

[0045] Specifically, the first scale formation monitoring device and the second scale formation monitoring device are connected to a scale formation monitor and a corrosion monitor through cable wires, and the measurement data of the first scale formation monitoring device and the second scale formation monitoring device are independent of each other and do not interfere with each other.

[0046] A method for using a rapid fouling evaluation device, comprising the following steps:

[0047] S1. Connect the on-site pipeline to the sample inlet, and then pump the sample liquid into the filtering device through a water pump and a solenoid valve;

[0048] Send a control instruction to the fouling monitoring module remotely or locally to start the measurement, collect the measurement data of the fouling monitoring probe, and perform analysis;

[0049] The measurement data is directly displayed on the touch screen on the cabinet, or transferred to a laptop or computer through the communication interface on the cabinet for data reading and analysis;

[0050] The fouling monitoring probe promotes the growth of the fouling layer. When the surfaces of the fouling indicating electrode and the concave annular fouling induction electrode are covered by the fouling layer, the degree of surface fouling can be indicated by measuring the electrochemical impedance between the fouling indicating electrode and the stainless steel counter electrode;

[0051] S2. Measure the resistance value of the fouling layer by the electrochemical impedance method. Through the difference impedance between the high-frequency Z H and the medium-frequency impedance Z m , the fouling layer resistance R is obtained;

[0052] R = (Z H - Z m ) / 2

[0053] Under cathodic polarization, alkalization occurs on the surface of the fouling induction electrode, and the following reaction occurs:

[0054]

[0055]

[0056] Thus, a fouling layer is formed on the surfaces of the concave annular fouling induction electrode and the needle-shaped fouling indicating electrode. Assuming that the fouling layer on the surface of the indicating electrode grows uniformly, the resistance of the fouling per unit area is R', the area of the fouling on the metal surface is S, and the total resistance value of the fouling is R. Then, the calculation formula for the total resistance value R is as follows:

[0057] R = R'S

[0058] Within a short period of time t, the area of the fouling on the metal surface is S t , and the total resistance value of the fouling is R t ; then, within a short period of time t, the calculation formula for the total resistance value R t is as follows:

[0059] R t = R'S t

[0060] As time goes by, the fouling will cover the metal surface completely. At this time, the area of the fouling is S∞ , the total resistance value of the scale is R ∞ , then, under a relatively long time, the total resistance value R of the scale ∞ is calculated as follows:

[0061] R ∞ = R’S ∞

[0062] The fouling index α is the coverage rate of the scale on the metal surface and can be calculated through resistance. The specific formula is as follows:

[0063]

[0064] Furthermore, use step S3 to replace step S2,

[0065] S3. It can be known from the electrochemical impedance spectroscopy that the high-frequency region corresponds to the scale layer grown on the surface of the fouling monitoring probe, and the impedance in the low-frequency region corresponds to the charge transfer resistance; therefore, the thickness of the scale layer can be measured by the resistance value in the high-frequency region;

[0066] Select the impedance value at the characteristic frequency of 117 Hz in the high-frequency region for calculation;

[0067] R 0 is the impedance modulus value at 117 Hz under the blank condition on the probe surface (no scale), R t is the impedance modulus value at 117 Hz for the test resistivity after the probe surface reacts for 2 h, R ∞ is the impedance modulus value at 117 Hz after the probe reacts for 2 days (complete fouling); the calculation formula for the fouling index α of the fouling monitoring sensor is as follows:

[0068]

[0069] The present invention has the following beneficial effects compared with the prior art:

[0070] 1. Adopt cathodic polarization to promote the growth of the scale layer by alkalizing the surface of the fouling induction electrode, so that the scale layer fills the gap between the indicating electrode and the induction electrode, and then evaluate the surface structure density through the impedance value at 117 Hz between the indicating electrode and the counter electrode;

[0071] 2. This device can be directly connected to the oilfield field process to directly measure the fouling index of the medium in the pipeline, avoiding the deviation of the test results caused by the leakage of oxygen exposure and CO 2 , H 2 S during the process of sampling to the laboratory. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] Figure 1 is a schematic diagram of the internal structure of a fast fouling evaluation device of the present invention;

[0073] Figure 2 It is a schematic structural diagram of the upper cover of a rapid fouling evaluation device of the present invention;

[0074] Figure 3 It is a schematic external structure diagram of a rapid fouling evaluation device of the present invention;

[0075] In the figure: 1 - cabinet; 2 - upper cover door lock; 3 - 220V power supply interface; 4 - touch screen; 5 - screen switch; 6 - power switch; 7 - RS485 communication interface; 8 - main control board; 9 - fouling monitor; 10 - corrosion monitor; 11 - switching power supply; 12 - controller; 13 - hydraulic pneumatic spring; 14 - pressure gauge; 15 - three-way joint; 16 - first fouling monitoring device; 17 - second fouling monitoring device; 18 - shock-absorbing wheel; 19 - solenoid valve; 20 - water pump; 21 - lead-acid battery; 22 - first sampling port; 23 - second sampling port; 24 - filtering device; 25 - handle; 26 - sample outlet; 27 - cable; 28 - first pipeline; 29 - quick-connect interface. Specific embodiments

[0076] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0077] Embodiment 1:

[0078] Please refer to Figures 1 to 3 , a rapid fouling evaluation device provided by the present invention includes a filtering device 24 and a fouling monitoring module;

[0079] The fouling monitoring module includes a fouling monitoring device, a fouling monitor 9, and a corrosion monitor 10. A fouling monitoring probe is provided on the fouling monitoring device. The fouling monitoring probe is connected to the fouling monitor and the corrosion monitor through a cable 27. The filtering device 24 is connected to the fouling monitoring device through a first pipeline 28. A liquid level sensor is provided in the fouling monitoring device for water level monitoring.

[0080] It further includes a sampling tube and a sample outlet tube. A solenoid valve 19 and a water pump 20 are provided on the sampling tube. The sampling tube is provided with a sampling port. The sampling tube is connected to the filtering device 24. The sample outlet tube is provided with a sample outlet. The sample outlet tube is connected to the fouling monitoring device. Quick-connect interfaces 29 are provided at both the sampling port and the sample outlet for convenient installation.

[0081] The sampling tube, the sample outlet tube, and the first pipeline 28 are all steel wire hoses.

[0082] The scale monitoring device is a tank body, and the filtering device 24 is composed of at least one filtering tank.

[0083] The sample liquid enters the filtering device 24 from the sample inlet 22 through the water pump 20 and the solenoid valve 19 via the sample inlet pipe, then enters the scale monitoring device through the first pipeline for scale monitoring, and finally is discharged through the sample outlet pipe.

[0084] The filtering device 24 and the scale monitoring module are both arranged in the cabinet 1. The cabinet is provided with an upper cover, and the upper cover is provided with an upper cover door lock 2. The scale monitor 9 and the corrosion monitor 10 are arranged in the upper cover. A switching power supply 11, a controller 12, and a main control board 8 are also arranged in the upper cover. The scale monitor 9, the corrosion monitor 10, and the main control board 8 are all connected to the controller 12. The main control board 8 is connected to the water pump 20 and the solenoid valve 19. The controller 12 can receive the monitoring data of the scale monitor 9 and the corrosion monitor 10, and control the start and stop of the water pump 20 and the solenoid valve 19 through the main control board 8. The controller 12 and the main control board 8 obtain power from the switching power supply 11.

[0085] The upper cover is also provided with a control panel, and the control panel is provided with a touch screen 4, a screen switch 5, a power switch 6, and an RS485 communication interface 7. The touch screen 4 and the RS485 communication interface 7 are both connected to the controller 12. The touch screen 4 obtains power from the switching power supply 11. The power switch 6 controls the power-on state of the switching power supply 11, and the screen switch 5 controls the power-on state of the touch screen 4.

[0086] A lead-acid battery 21 is arranged in the cabinet. The lead-acid battery 21 is connected to the switching power supply 11 to supply power to the instrument. The upper cover is provided with a 220V power interface 3, and the 220V power interface 3 is connected to the switching power supply 11. When the 220V power supply is connected, the lead-acid battery 21 is charged through the switching power supply 11.

[0087] A handle 25 is installed on the side of the cabinet 1, and shock-absorbing wheels 18 are installed at the bottom of the cabinet for easy movement. The use of decompression and shock absorption is safe and convenient. A pressure gauge 14 is arranged on the front of the cabinet, and the pressure gauge is connected to the sample inlet pipe to indicate the pressure of the sample inlet pipe.

[0088] Instructions are sent to the controller 12 through the touch screen 4, and the water pump 20 and the solenoid valve 19 are controlled to intake water through the main control board 8. The controller 12 controls the scale monitor 9 and the corrosion monitor 10 to measure, and the measurement data is displayed on the touch screen 4.

[0089] The notebook and the device are connected through a USB to RS485 communication line, and the device is controlled through computer software.

[0090] Open the cabinet through the upper cover door lock 2. Inside the upper cover, a hydro-pneumatic spring 13 is provided to support the upper part of the cabinet 1, facilitating the maintenance of the probes inside the cabinet 1 and the filter element in the filtering device 24.

[0091] The scale monitoring probe consists of eight parts, namely a connector, a probe housing, a adapter, a scale induction electrode, a scale indicating electrode, an auxiliary electrode, a reference electrode, and an oil-proof cover. The connector is arranged at the upper end of the probe housing, the oil-proof cover is arranged at the lower end of the probe housing, the adapter is arranged on the outer wall of the probe housing, and the scale induction electrode, the scale indicating electrode, the auxiliary electrode, and the reference electrode are inserted into the probe housing from inside the oil-proof cover and connected to the connector.

[0092] The scale induction electrode and the auxiliary electrode are isolated by an insulating resin. Two scale indicating electrodes are provided, and one scale induction electrode, one auxiliary electrode, and one reference electrode are provided. The auxiliary electrode and the reference electrode are made of stainless steel and are used for inducing scale by an electrochemical method and measuring the electrochemical impedance of the scale layer to reflect the change of the scale formation rate.

[0093] The scale monitoring probe promotes the growth of the scale layer. The scale induction electrode is annular, and the scale indicating electrode is needle-shaped. The scale indicating electrode is arranged at the center of the scale induction electrode. The materials of both electrodes are carbon steel. When the surfaces of the scale indicating electrode and the concave annular scale induction electrode are covered by the scale layer, the degree of surface structure can be indicated by measuring the electrochemical impedance between the scale indicating electrode and the stainless steel counter electrode.

[0094] All electrodes are connected to the connector through the wires inside the probe housing for applying test signals. A temperature sensor is also arranged inside the housing. The temperature sensor is connected to the connector through the wires inside the housing. The hollow part of the housing is filled with insulating sealant to ensure the sealing performance and insulation performance. The connector is a six-core connector, and the housing material is 316 stainless steel.

[0095] The scale monitoring device is provided with an NPT interface for installing the scale monitoring probe.

[0096] It should be noted that the basic structure of the scale monitoring probe is a connector, a housing, an adapter, electrodes, and an oil-proof cover. The present invention makes improvements to the electrodes and adds a temperature sensor. Those skilled in the art can know the structure of the scale monitoring probe used in the present invention according to the specification text and the prior art.

[0097] Embodiment 2:

[0098] On the basis of Embodiment 1, two scale monitoring devices are provided in this embodiment, namely a first scale monitoring device 16 and a second scale monitoring device 17; two sampling pipes are provided, namely a first sampling pipe and a second sampling pipe.

[0099] The first sampling tube is provided with a first sampling port 22, the second sampling tube is provided with a second sampling port 23, the first sampling tube and the second sampling tube are respectively communicated with a filtering device 24, and electromagnetic valves 19 and water pumps 20 are arranged on both the first sampling tube and the second sampling tube;

[0100] The sample outlet tube is communicated with a first scaling monitoring device 16 and a second scaling monitoring device 17 through a tee joint 15.

[0101] The first scaling monitoring device 16 and the second scaling monitoring device 17 are connected to a scaling monitor 9 and a corrosion monitor 10 through a cable 27, and the measurement data of the first scaling monitoring device 16 and the second scaling monitoring device 17 are independent of each other and do not interfere with each other.

[0102] Embodiment 3:

[0103] Based on Embodiment 1 or 2, this embodiment provides a method for using a scaling rapid evaluation device, including the following steps:

[0104] S1. Connect the on-site pipeline to the sampling port, and then pump the sample liquid into the filtering device 24 through the water pump 20 and the electromagnetic valve 19;

[0105] Send a control instruction to the scaling monitoring module remotely or locally to start measurement, collect the measurement data of the scaling monitoring probe, and perform analysis;

[0106] The measurement data is directly displayed on the touch screen on the cabinet, or transferred to a laptop or computer through the RS485 communication interface 7 on the cabinet for data reading and analysis;

[0107] The scaling monitoring probe promotes the growth of the scale layer. When the surfaces of the scaling indicating electrode and the concave annular scaling induction electrode are covered by the scale layer, the degree of surface structure can be indicated by measuring the electrochemical impedance between the scaling indicating electrode and the stainless steel counter electrode;

[0108] S2. Measure the scale layer resistance value by the electrochemical impedance method, mainly through the difference impedance between the high-frequency Z H (such as 10KHz) and the intermediate-frequency impedance Z m to obtain the scale layer resistance R;

[0109] R = (Z H - Z m ) / 2

[0110] Under cathodic polarization, alkalization appears on the surface of the scaling induction electrode, and the following reaction occurs:

[0111]

[0112]

[0113] Thus, a scale layer is formed on the surface of the concave ring scale-induced electrode and the needle-shaped scale-indicating electrode. Assuming that the scale layer on the surface of the indicating electrode grows uniformly, the resistance of the scale per unit area is R', the area of the scale on the metal surface is S, and the total resistance of the scale is R. Then, the calculation formula for the total resistance R is as follows:

[0114] R = R'S

[0115] Within a short period of time t, the area of the scale on the metal surface is S t , and the total resistance of the scale is R t ; then, within a short period of time t, the total resistance R t The calculation formula is as follows:

[0116] R t = R'S t

[0117] As time goes by, the scale will cover the metal surface. At this time, the area of the scale is S ∞ , and the total resistance of the scale is R ∞ , then, under a longer time, the total resistance R of the scale ∞ The calculation formula is as follows:

[0118] R ∞ = R'S ∞

[0119] The scaling index α is the coverage rate of the scale on the metal surface and can be calculated through resistance. The specific formula is as follows:

[0120]

[0121] Replace step S2 with step S3

[0122] S3. It can be known from the electrochemical impedance spectrum that the high-frequency region corresponds to the scale layer growing on the surface of the scaling monitoring probe, and the impedance in the low-frequency region corresponds to the charge transfer resistance. Therefore, the thickness of the scale layer can be measured by the resistance value in the high-frequency region;

[0123] For the convenience of calculation, the impedance value at the characteristic frequency of 117 Hz in the high-frequency region is selected for calculation;

[0124] R 0 is the impedance modulus value at 117 Hz under the blank condition on the surface of the probe (no scale on the surface), R t is the impedance modulus value at 117 Hz when the probe reacts for 2 h (testing the resistivity), R ∞ is the impedance modulus value at 117 Hz when the probe reacts for 2 days (complete scaling); the calculation formula for the scaling index α of the scaling monitoring sensor is as follows:

[0125]

[0126] The above-mentioned device can perform timing monitoring on-site, be powered by the built-in lead-acid battery 21, and save data to the internal memory of the device controller 12.

[0127] In this application, all components themselves that are not described in detail and the connection methods of various components in this application belong to the well-known technologies in this technical field. They can be directly applied without further elaboration.

[0128] In the present invention, the term "a plurality of" means two or more, unless otherwise clearly defined. Terms such as "mounted", "connected", "connected to", "fixed" and other terms should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in the present invention can be understood according to specific circumstances.

[0129] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as a limitation of the present invention.

[0130] In the description of this specification, the description of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above-mentioned terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0131] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A rapid fouling evaluation device, comprising a filtering device, characterized in that, it further comprises a fouling monitoring module, and the fouling monitoring module includes a fouling monitoring device, a fouling monitor, and a corrosion monitor; a fouling monitoring probe is arranged on the fouling monitoring device, and a fouling induction electrode and a fouling indicating electrode are arranged in the fouling monitoring probe; the fouling monitoring probe is connected to the fouling monitor and the corrosion monitor through a cable, and the filtering device is communicated with the fouling monitoring device through a first pipeline.

2. The rapid fouling evaluation device according to claim 1, characterized in that, it further comprises a sampling pipe and a sample outlet pipe; a solenoid valve and a water pump are arranged on the sampling pipe, the sampling pipe is provided with a sampling port, and the sampling pipe is communicated with the filtering device; the sample outlet pipe is provided with a sample outlet, and the sample outlet pipe is communicated with the fouling monitoring device; both the sampling port and the sample outlet are provided with quick-connect interfaces for convenient installation.

3. The rapid fouling evaluation device according to claim 2, characterized in that, a liquid level sensor is arranged in the fouling monitoring device for water level monitoring; an NPT interface is arranged on the fouling monitoring device for installing the fouling monitoring probe; the sampling pipe, the sample outlet pipe, and the first pipeline are all steel wire hoses; the fouling monitoring device is a tank body, and the filtering device is composed of at least one filter tank.

4. The rapid fouling evaluation device according to claim 2, characterized in that, both the filtering device and the fouling monitoring module are arranged in a cabinet; the cabinet is provided with an upper cover, the fouling monitor and the corrosion monitor are arranged in the upper cover, and a switching power supply, a controller, and a main control board are also arranged in the upper cover; the fouling monitor, the corrosion monitor, and the main control board are all connected to the controller, and the main control board is connected to the water pump and the solenoid valve; the controller can receive the monitoring data of the fouling monitor and the corrosion monitor, and can control the start and stop of the water pump and the solenoid valve through the main control board; the controller and the main control board obtain power from the switching power supply.

5. The rapid fouling evaluation device according to claim 4, characterized in that, the upper cover is further provided with a control panel, and a touch screen, a screen switch, a power switch, and a communication interface are arranged on the control panel; both the touch screen and the communication interface are connected to the controller, and the touch screen obtains power from the switching power supply; the power switch controls the power-on state of the switching power supply, and the screen switch controls the power-on state of the touch screen; a pressure gauge is arranged on the front of the cabinet, and the pressure gauge is connected to the sampling pipe to indicate the pressure of the sampling pipe; a lead-acid battery is arranged in the cabinet, and the lead-acid battery is connected to the switching power supply; a power interface is arranged on the upper cover, and the power interface is connected to the switching power supply.

6. The rapid fouling evaluation device according to claim 4, characterized in that, the upper cover is provided with an upper cover door lock, a handle is installed on the side of the cabinet, shock-absorbing wheels are installed at the bottom of the cabinet, and a hydraulic pneumatic spring is arranged inside the upper cover, and the hydraulic pneumatic spring is connected to the upper end of the cabinet.

7. The rapid fouling evaluation device according to any one of claims 1-6, characterized in that, The scale monitoring probe includes a aviation plug, a probe housing, a adapter, a scale induction electrode, a scale indicating electrode, an auxiliary electrode, a reference electrode and an oil-proof cover; The aviation plug is arranged at the upper end of the probe housing, the oil-proof cover is arranged at the lower end of the probe housing, the adapter is arranged on the outer wall of the probe housing, and the scale induction electrode, the scale indicating electrode, the auxiliary electrode and the reference electrode are inserted into the probe housing from inside the oil-proof cover and connected to the aviation plug.

8. A scale rapid evaluation device according to claim 7, characterized in that, an insulating resin is used to isolate between the scale induction electrode and the auxiliary electrode; two scale indicating electrodes are provided, and one scale induction electrode, one auxiliary electrode and one reference electrode are provided; the auxiliary electrode and the reference electrode are made of stainless steel, and the scale indicating electrode and the scale induction electrode are made of carbon steel; the scale indicating electrode is needle-shaped and is arranged at the center of the scale induction electrode.

9. A scale rapid evaluation device according to claim 8, characterized in that, all electrodes are connected to the aviation plug through wires inside the probe housing; a temperature sensor is further arranged inside the housing, and the temperature sensor is connected to the aviation plug through a wire inside the housing; the hollow part inside the housing is filled with insulating sealant.

10. A scale rapid evaluation device according to claim 2, characterized in that, there are two scale monitoring devices, which are divided into a first scale monitoring device and a second scale monitoring device; there are two sampling tubes, which are divided into a first sampling tube and a second sampling tube; the first sampling tube is provided with a first sampling port, the second sampling tube is provided with a second sampling port, the first sampling tube and the second sampling tube are respectively communicated with the filtering device, and electromagnetic valves and water pumps are arranged on both the first sampling tube and the second sampling tube; the sampling tube is communicated with the first scale monitoring device and the second scale monitoring device through a tee joint; the first scale monitoring device and the second scale monitoring device are connected to a scale monitor and a corrosion monitor through a cable, and the measurement data of the first scale monitoring device and the second scale monitoring device are independent of each other and do not interfere with each other.

11. A method for using a scale rapid evaluation device, characterized in that, it includes the following steps: S1. Connect the on-site pipeline to the sampling port, and then pump the sample liquid into the filtering device through the water pump and the electromagnetic valve; send a control instruction to the scale monitoring module remotely or locally to start measurement, collect the measurement data of the scale monitoring probe, and perform analysis; the measurement data is directly displayed on the touch screen on the cabinet, or transferred to a laptop or computer through the communication interface on the cabinet for data reading and analysis; the scale monitoring probe promotes the growth of the scale layer. When the surfaces of the scale indicating electrode and the concave annular scale induction electrode are covered by the scale layer, the degree of surface structure can be indicated by measuring the electrochemical impedance between the scale indicating electrode and the stainless steel counter electrode; S2. Measure the scale resistance value by electrochemical impedance method, and obtain the scale resistance R through the differential impedance between the high-frequency impedance Z H and the medium-frequency impedance Z m . R = (Z H - Z m ) / 2 under cathodic polarization, alkalization appears on the surface of the scale induction electrode, and the following reaction occurs: Thus, a scale layer is formed on the surface of the concave ring scale-induced electrode and the needle-shaped scale-indicating electrode. Assuming that the scale layer on the surface of the indicating electrode grows uniformly, the resistance of the scale per unit area is R', the area of the scale on the metal surface is S, and the total resistance of the scale is R. Then, the calculation formula for the total resistance R is as follows: R = R'S Within a short period of time t, the area of the scale on the metal surface is S t , and the total resistance value of the scale is R t ; then, within a short period of time t, the calculation formula for the total resistance value R t is as follows: R t = R’S t Over time, scale will grow on the metal surface. At this time, the area of the scale is S ∞ , and the total resistance value of the scale is R ∞ ; then, under a relatively long time, the calculation formula for the total resistance value R ∞ of the scale is as follows: R ∞ = R’S ∞ The scaling index α is the coverage rate of the scale on the metal surface and can be calculated through resistance. The specific formula is as follows:

12. The usage method of a scaling rapid evaluation device according to claim 11, characterized in that, step S3 is used to replace step S2, S3. As known from the electrochemical impedance spectrum, the high-frequency region corresponds to the scale layer grown on the surface of the scaling monitoring probe, and the impedance in the low-frequency region corresponds to the charge transfer resistance. Therefore, the thickness of the scale layer can be measured by the resistance value in the high-frequency region; select the impedance value at the characteristic frequency of 117 Hz in the high-frequency region for calculation; R 0 is the impedance modulus value at 117 Hz under the condition of a blank probe surface with no fouling, R t is the impedance modulus value at 117 Hz of the probe surface after 2 h of reaction for resistivity measurement, R ∞ is the impedance modulus value at 117 Hz of the probe after 2 days of reaction with complete fouling; the calculation formula for the fouling index α of the fouling monitoring sensor is as follows:

Images