CN209803047U

CN209803047U - Instrument for dynamically measuring performance of scale inhibitor

Info

Publication number: CN209803047U
Application number: CN201920154283.3U
Authority: CN
Inventors: 原堃; 杨欢; 黄茗; 罗跃; 石秀慧; 尹先清; 苏高申; 米远祝; 颜学敏; 丁康乐
Original assignee: Yangtze University; Sinopec Shengli Oilfield Co Linpan Oil Production Plant
Current assignee: Yangtze University; Sinopec Shengli Oilfield Co Linpan Oil Production Plant
Priority date: 2019-03-20
Filing date: 2019-03-20
Publication date: 2019-12-17
Anticipated expiration: 2029-03-20

Abstract

The utility model provides an instrument for dynamically measuring the performance of a scale inhibitor, which comprises a first conveying device, a second conveying device, a recovery device, a guide pipe, a guide rail, a conductivity testing device, a data acquisition device and a stopwatch; the upper end of the guide pipe is provided with an opening; the first conveying device and the second conveying device are both communicated with one end of the guide pipe, and the recovery device is communicated with the other end of the guide pipe; the guide rail is positioned above the upper end opening of the guide pipe; the conductivity testing device comprises a conductivity probe and a conductivity meter, the conductivity probe is arranged on the guide rail and is electrically connected with the conductivity meter; the data acquisition device is electrically connected with the conductivity meter; by comparing the change conditions of the conductivity of the mixed fluid before and after the scale inhibitor is added into the conduit, the performance of the scale inhibitor in the dynamic fluid can be quickly and accurately described, and the dispersion and migration conditions of the scale inhibitor and the scale can be described.

Description

instrument for dynamically measuring performance of scale inhibitor

Technical Field

the utility model relates to a LED tests technical field, in particular to instrument of developments survey antisludging agent performance.

Background

At present, a method for adding a scale inhibitor becomes a main means for effectively controlling scale in circulating cooling water systems at home and abroad. Therefore, the development and reasonable utilization of the scale inhibitor are the key problems of the treatment of the circulating water. It is very important to be able to accurately and rapidly evaluate the scale inhibition performance of the scale inhibitor. A reasonable evaluation method is selected, and an important guiding function is provided for accurately and comprehensively understanding the performance and action mechanism of different scale inhibitors. At present, several common methods for evaluating the scale inhibitor at home and abroad comprise a static scale inhibition method, a bubbling method, a limiting carbonate method, a scale weighing method, a critical pH value method and the like. The actual use effects of different scale inhibitors cannot be reflected well, and the time required for evaluating one scale inhibitor is long.

The patent with the patent number of CN104458689B and the name of "a dynamic scale tester and test method thereof" discloses a test device, which injects fluorescent tracer with a pulse injector, samples at the end of a conduit with a measuring cylinder, records the concentration of the fluorescent tracer after the sample is tested by a fluorescence spectrophotometer, and calculates the residence time distribution and the dispersion condition of the scale fluid in the conduit and the specific scale position according to the concentration test of the fluorescent tracer. However, the testing method is complex, the calculation method is complicated, and a specific method is not provided for evaluating the scale inhibitor.

the patent application with the publication number of CN101270660 and the name of dynamic scaling instrument discloses a test device, the dynamic scaling instrument can shorten the experimental time, is real-time and rapid, can select the mixing proportion with the minimum scaling amount, and provides a technical basis for a water injection scheme; the scale inhibitor is optimized by monitoring the scale inhibition effect of different scale inhibitors at different concentrations; the test device monitors and records the bottom hole condition in real time through calcium and magnesium ions, temperature and pressure sensors. The scale inhibition detector can not analyze the scale condition in a conveying pipeline and can not detect the performance change of the scale inhibitor in the pipeline, and a pressure sensor of the scale inhibition detector is not sensitive to a conductivity probe.

the patent with the patent number of CN203658300U, the name "a test device for utilizing conductivity method to survey scale inhibitor performance" discloses a test device, and the evaluation measuring cell is effective airtight, avoids survey process titrant to receive the influence of the carbon dioxide in the air and this equipment is comparatively compact, connects more firmly, is difficult to knock over the glass container. But the method has the defects that the performance of the scale inhibitor cannot be evaluated in a dynamic state, and most scales are formed in the fluid in reality, so that the change trend of scale forming ions cannot be accurately described, and the performance change of the scale inhibitor in the fluid cannot be accurately reflected.

the patent with the patent number of CN206618648U and the name of antisludging agent evaluation device also discloses an evaluation device, the antisludging performance of the antisludging agent is tested through the weight change of a filler test reagent, but the scaling is a process from microcosmic to intuitive, the weight change is very small for the initial state of the scaling, and the weight change can not accurately reflect the performance of the antisludging agent.

The patent with the patent number of CN201273899 and the name of 'evaluation test device for circulating water scale inhibitor' also discloses an evaluation device. The basic idea of the evaluation device is to take a circulating cooling water actual system of a thermal power plant as a blueprint and to be formed by appropriate micro-shrinkage. The method is only suitable for evaluating the circulating cooling water scale inhibitor of a thermal power plant, and cannot meet the performance evaluation of the scale inhibitor in most industrial production pipelines.

The existing patents or patent applications can see that in the prior art, some test devices have long evaluation time of the scale inhibitor and complex calculation process, some test devices only evaluate the performance of the scale inhibitor under a static condition, some test devices can only compare the performance of the scale inhibitor after a large amount of scale is formed, and some test devices can only adapt to the evaluation requirements of the industry, and have certain limitations.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art, provides an instrument for dynamically measuring the performance of the scale inhibitor, solves the defects that the prior art has long evaluation time, can not accurately evaluate the performance of the scale inhibitor under the static condition and can not be suitable for most industrial production, can realize the dynamic evaluation of the scale inhibitor in experimental research and field production, and can describe the dispersion and migration conditions of the scale inhibitor and scaling substances; and the instrument is assembled in a split way, so that the instrument is convenient to install, use, maintain and reform.

The utility model discloses a realize like this:

The utility model aims to provide an instrument for dynamically measuring the performance of a scale inhibitor, which comprises a first conveying device, a second conveying device, a recovery device, a conduit, a guide rail, a conductivity testing device, a data acquisition device and a stopwatch;

The upper end of the guide pipe is provided with an opening;

The first conveying device and the second conveying device are both communicated with one end of the guide pipe, and the recovery device is communicated with the other end of the guide pipe;

The guide rail is positioned above the upper end opening of the guide pipe;

The conductivity testing device comprises a conductivity probe and a conductivity meter, the conductivity probe is arranged on the guide rail and is electrically connected with the conductivity meter;

the data acquisition device is electrically connected with the conductivity meter.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model provides an instrument for dynamically measuring the performance of a scale inhibitor, which can quickly test the performance of the scale inhibitor in the fluid flowing process, can describe the dispersion and migration conditions of the scale inhibitor and a scaling object, and can be suitable for the performance evaluation of the scale inhibitor in most industrial production pipelines; the method well solves the problems that the prior art can not quickly and sensitively evaluate the performance of the scale inhibitor, and the prior evaluation device can not be used in most industrial production under dynamic conditions.

2. the utility model provides a pair of instrument components of a whole that can function independently equipment of developments survey antisludging agent performance, simple to operate uses, maintains and reforms transform simply.

Drawings

FIG. 1 is a schematic structural diagram of an instrument for dynamically measuring the performance of an antisludging agent provided by the embodiment of the present invention;

FIG. 2 is another schematic structural diagram of the apparatus for dynamically determining the performance of the scale inhibitor provided by the embodiment of the present invention;

fig. 1-2, 1, a first conveyor; 11. first conveying; 12. a first water tank; 13. a first valve; 14. a first flow meter; 15. a first bracket; 16. a first buffer tank; 2. a second conveying device; 21. Second conveying; 22. a second water tank; 23. a second valve; 24. a second flow meter; 25. a second bracket; 26. a second buffer tank; 3. a recovery device; 4. a conduit; 5. a guide rail; 6. a conductivity testing device; 61. a conductivity probe; 62. a conductivity meter; 7. a data acquisition device; 71. a data acquisition card; 72. a computer; 8. a stopwatch; 9. a catheter stent;

FIG. 3 is a graph of conductivity at the inlet of a conduit as a function of time without addition of scale inhibitor;

FIG. 4 is a graph of conductivity over time for the middle of a conduit without added scale inhibitor;

FIG. 5 is a graph of conductivity at the outlet of a conduit as a function of time without addition of scale inhibitor;

FIG. 6 is a graph of conductivity at the inlet of a conduit as a function of time after addition of a scale inhibitor;

FIG. 7 is a graph of conductivity over time for the middle of a conduit after addition of a scale inhibitor;

FIG. 8 is a graph of conductivity over time at the outlet of a conduit after addition of a scale inhibitor;

FIG. 9 is a combined view of examples 1 and 4;

FIG. 10 is a combined view of examples 2 and 5;

FIG. 11 is a combined graph of examples 3 and 6;

FIG. 12 is a combined diagram of examples 1 to 6.

Detailed Description

First, as shown in fig. 1, an embodiment of the present invention provides an instrument for dynamically measuring the performance of a scale inhibitor, which includes a first conveying device 1, a second conveying device 2, a recovery device 3, a conduit 4, a guide rail 5, a conductivity testing device 6, a data acquisition device 7, and a stopwatch 8;

the upper end of the conduit 4 is provided with an opening;

The first conveying device 1 and the second conveying device 2 are both communicated with one end of the guide pipe 4, and the recovery device 3 is communicated with the other end of the guide pipe 4;

the guide rail 5 is positioned above the upper end opening of the guide tube 4;

the conductivity testing device 6 comprises a conductivity probe 61 and a conductivity meter 62, the conductivity probe 61 is arranged on the guide rail 5, and the conductivity probe 61 is electrically connected with the conductivity meter 62;

the data acquisition device 7 is electrically connected with the conductivity meter 62.

Specifically, as shown in fig. 1, the first delivery device 1 includes a first delivery pipe 11, a first water tank 12, a first valve 13 and a first flow meter 14, the first water tank 12 is communicated with one end of the conduit 4 through the first delivery pipe 11, and the first valve 13 and the first flow meter 14 are both mounted on the first delivery pipe 11. The first valve 13 is arranged to facilitate the control of the opening and closing of the first delivery pipe 11, and the first flow meter 14 is arranged to control the flow rate of the solution delivery, thereby facilitating the detection.

Preferably, as shown in fig. 1, a first bracket 15 is disposed below the first water tank 12. The first water tank 12 is placed on the first bracket 15. The first support 15 is used for supporting, on the other hand, the first support 15 is also used for lifting the first water tank 12, so that the solution in the first water tank 12 flows into the first conveying pipe 11 by gravity and then flows into the conduit 4.

Preferably, as shown in fig. 2, a first buffer tank 16 is further disposed on the first delivery pipe 11, and the first buffer tank 16 is communicated with the first water tank 12. The water level of the first buffer tank 16 slowly drops, the pressure difference changes, the first water tank 12 can be unstable when delivering the solution, and the pressure difference can be guaranteed to be stable by the first buffer tank 16, so that the long-time stable delivery of water flow is guaranteed.

specifically, as shown in fig. 1, the second delivery device 2 includes a second delivery pipe 21, a second water tank 22, a second valve 23, and a second flow meter 24, the second water tank 22 is communicated with one end of the conduit 4 through the second delivery pipe 21, and the second valve 23 and the second flow meter 24 are both mounted on the second delivery pipe 21. The second valve 23 is arranged to facilitate the control of the opening and closing of the second delivery pipe 21, and the second flow meter 24 is arranged to control the flow rate of the solution delivery, thereby facilitating the detection.

preferably, as shown in fig. 1, a second bracket 25 is provided under the second water tank 22. The second water tank 22 is placed on the second bracket 25. The second support 25 is used for supporting, on the other hand, the second support 25 is also used for lifting the second water tank 22, so that the solution in the second water tank 22 flows into the second delivery pipe 21 by gravity and then flows into the conduit 4.

Preferably, as shown in fig. 2, a second buffer tank 26 is further disposed on the second delivery pipe 21, and the second buffer tank 26 is in communication with the second water tank 22. The water level of the second buffer tank 26 slowly decreases, the pressure difference changes, the second water tank 22 can be unstable when delivering solution, and the pressure difference can be guaranteed to be stable by the second buffer tank 26, so that the long-time stable delivery of water flow is guaranteed.

Preferably, a catheter support 9 is arranged below the catheter 4. The catheter 4 is placed on the catheter holder 9.

Specifically, the cross section of the conduit 4 may be circular (i.e., a round tube), or rectangular (i.e., a long tube).

Preferably, the recycling device 3 is a waste water recycling tank for recycling waste water in the conduit 4.

specifically, the data acquisition device 7 includes a data acquisition card 71 and a computer 72, and both the computer 72 and the conductivity meter 62 are electrically connected to the data acquisition card 71. The conductivity probe 61 transmits the detected data to the conductivity meter 61, the conductivity meter 61 transmits the data to the data acquisition card 71, and the data acquisition card 71 records and transmits the data to the computer 72 for recording and displaying. The model of the data acquisition card is PMD-1208LS model, and the manufacturer is American MCC company.

Secondly, the testing method of the instrument for dynamically measuring the performance of the scale inhibitor comprises the following steps:

step 1, preparing a scale formation cation aqueous solution from calcium chloride and preparing a scale formation anion aqueous solution from sodium bicarbonate;

step 2, respectively opening the conductivity meter and the data acquisition device;

step 3, placing the prepared scaling cation aqueous solution in a first conveying device or a second conveying device, placing the scaling anion aqueous solution in the second conveying device or the first conveying device, opening the first conveying device firstly, enabling the first conveying device to convey stably, then intermittently opening the second conveying device, starting timing, and injecting the other solution in a pulse mode;

Step 4, after the flow velocity is stable, placing the conductivity probe into the conduit to measure the change data of the conductivity, wherein the conductivity probe moves along the guide rail and is used for detecting the conductivity at any position and any time on the conduit, and the conductivity is measured by the conductivity meter and recorded by the data acquisition device;

Step 5, cleaning the catheter after the recording is finished;

step 6, after cleaning, adding a certain amount of scale inhibitor into the first conveying device or the second conveying device, repeating the step 3-4, and recording the change data of the conductivity after adding the scale inhibitor;

step 7, before adding the scale inhibitor at the same position on the guide pipe, the conductivity at the time of 0 is counted as a, and the lowest conductivity is counted as b; after adding the scale inhibitor, the conductivity at time 0 is equal and is also counted as a, and the lowest conductivity is counted as c, then the scale inhibitor effect w at that position on the conduit is (c-b)/(a-b) × 100%.

The change rule of the conductivity before and after adding the scale inhibitor is measured by a conductivity meter, and the change of the metastable zone of the scale inhibitor in the two reactions is compared, so that the scale inhibition effect of the scale inhibitor is obtained.

The invention is described in further detail below with reference to 6 examples.

Example 1:

Calcium chloride and sodium bicarbonate are selected to prepare a scaling cation aqueous solution and a scaling anion aqueous solution. Preparing 0.005mol/L calcium chloride solution, preparing 0.005mol/L sodium bicarbonate solution, filling the calcium chloride solution into a first water tank, and filling the sodium bicarbonate solution into a second water tank; respectively opening the conductivity meter, the data acquisition card and the computer; opening a first valve to adjust the flow rate to be 0.6mL/s, and after the flow rate of the calcium chloride solution is stable, placing the conductivity probe into the guide pipe and moving the conductivity probe to the inlet of the guide pipe; the second valve was opened intermittently and 5mL of sodium bicarbonate solution in the catheter was pulsed. The second valve was opened immediately, and the timing was started, and 1 minute thereafter, the timing was stopped, and the experiment was stopped. And (4) the computer sorts the data, and the data of the first 50s are taken out for analysis and calculation.

Conductivity at the conduit inlet as a function of time data are shown in table 1; and the data was plotted as shown in fig. 3 to find the lowest point of the data.

TABLE 1

time(s)	Conductivity (mu s/cm) without adding scale inhibitor
		0	1154
10	1013
		20	1085
30	1082
		40	1108
50	1130

Example 2:

After cleaning the catheter, the procedure of example 1 was repeated, changing only the position of the conductivity probe, moving the conductivity probe to the middle of the catheter, and measuring and recording the change in conductivity.

Conductivity data for the middle of the conduit over time are shown in table 2; and the data was plotted as shown in fig. 4 to find the lowest point of the data.

TABLE 2

time(s)	Conductivity (mu s/cm) without adding scale inhibitor
		0	1154
10	1153
		20	1089
30	1090
		40	1111
50	1143

Example 3:

after cleaning the conduit, the procedure of example 1 was repeated, changing only the position of the conductivity probe, moving the conductivity probe to the outlet of the conduit, and measuring and recording the change in conductivity.

conductivity over time at the outlet of the conduit is shown in table 3; and the data plotted as shown in fig. 5 to find the lowest point of the data.

TABLE 3

Time(s)	conductivity (mu s/cm) without adding scale inhibitor
		0	1154
10	1163
		20	1160
30	1102
		40	1097
50	1111

example 4:

Preparing 0.005mol/L calcium chloride solution, preparing 0.005mol/L sodium bicarbonate solution, adding 3% of scale inhibitor (HEDP), putting the calcium chloride solution into a first water tank, and putting the sodium bicarbonate solution into a second water tank; respectively opening the conductivity meter, the data acquisition card and the computer; opening a first valve to adjust the flow rate to be 0.6mL/s, and after the flow rate of the calcium chloride solution is stable, placing the conductivity probe into the guide pipe and moving the conductivity probe to the inlet of the guide pipe; the second valve was opened intermittently and 5mL of sodium bicarbonate solution in the catheter was pulsed. The second valve was opened immediately, and the timing was started, and 1 minute thereafter, the timing was stopped, and the experiment was stopped. And (4) the computer sorts the data, and the data of the first 50s are taken out for analysis and calculation.

Conductivity at the conduit inlet as a function of time data as shown in table 4; and the data was plotted as shown in fig. 6 to find the lowest point of the data.

TABLE 4

Time(s)	adding scale inhibitor with conductivity (mu s/cm)
		0	1154
10	1066
		20	1098
30	1137
		40	1139
50	1158

Example 5:

after cleaning the catheter, the procedure of example 4 was repeated, changing only the position of the conductivity probe, moving the conductivity probe to the middle of the catheter, and measuring and recording the change in conductivity.

Conductivity data for the middle of the conduit over time are shown in table 5; and the data plotted as shown in fig. 7 to find the lowest point of the data.

TABLE 5

time(s)	Adding scale inhibitor with conductivity (mu s/cm)
		0	1154
10	1169
		20	1109
30	1101
		40	1130
50	1161

Example 6:

After cleaning the conduit, the procedure of example 4 was repeated, changing only the position of the conductivity probe, moving the conductivity probe to the outlet of the conduit, and measuring and recording the change in conductivity.

conductivity data at the outlet of the conduit as a function of time are shown in table 6; and the data was plotted as shown in fig. 8 to find the lowest point of the data.

TABLE 6

time(s)	Adding scale inhibitor with conductivity (mu s/cm)
		0	1154
10	1175
		20	1180
30	1123
		40	1110
50	1134

Examples of the experiments

1. The data of example 1 and example 4 are combined in the same figure, as shown in fig. 9. It can be known that the conductivity at the time of 0 before adding the scale inhibitor at the inlet of the conduit is a-1154, and the lowest conductivity is b-1011; at the inlet of the conduit, after the scale inhibitor is added, the conductivity at the time of 0 is measured as a-1154, and the lowest conductivity is measured as c-1062; the effect evaluation of the antisludging agent at the inlet of the conduit can be obtained by the formula:

(1062－1011)÷(1154－1011)×100％＝35.66％。

2. The data of example 2 and example 5 are combined in the same figure, as shown in fig. 10. It can be known that before the scale inhibitor is added into the middle part of the conduit, the conductivity meter at the time of 0 is 1154, and the lowest conductivity meter is 1081; after the scale inhibitor is added into the middle part of the conduit, the conductivity at the time of 0 is measured as a-1154, and the lowest conductivity is measured as c-1096; the evaluation of the effect of the scale inhibitor in the middle of the conduit can be obtained by the formula:

(1096－1081)÷(1154－1081)×100％＝20.54％

3. the data of example 3 and example 6 are combined in the same figure, as shown in fig. 11. It can be known that the conductivity at the time of 0 before adding the scale inhibitor at the outlet of the conduit is a-1154, and the lowest conductivity is b-1093; at the outlet of the conduit, after the scale inhibitor is added, the conductivity at the time of 0 is measured as a-1154, and the lowest conductivity is measured as c-1099; the evaluation of the effect of the antisludging agent at the outlet of the conduit can be obtained by the formula:

(1099－1093)÷(1154－1093)×100％＝9.84％

Through the above 6 sets of tests (examples 1-6), it can be known that the scale inhibition rate of the scale inhibitor at the inlet of the conduit is the highest, and reaches 35.66%, and as the scale inhibitor reacts and migrates in the conduit, the scale inhibition rate of the scale inhibitor gradually decreases, and finally the scale inhibition rate at the outlet is only 9.84%.

therefore, the conductivity method is adopted to measure the scale inhibition capacity of the scale inhibitor in the fluid, and the performance of the scale inhibitor in the dynamic fluid can be quickly and accurately described by comparing the change conditions of the conductivity of the mixed fluid before and after the scale inhibitor is added into the conduit.

4. The data from examples 1-6 were merged together as shown in figure 12. Comparing the lowest conductivities at different locations of the conduits, it was found that the lowest conductivity was achieved at the inlet of the conduit for about 11s, at the middle of the conduit for about 25s and at the outlet of the conduit for about 35s, with a slight lag in the time to reach the lowest conductivity after addition of the anti-scalant. The time of the lowest conductivity, namely the time of the migration of the scale inhibitor and the scaling ions is illustrated, and the scale inhibition performance and the migration condition of the scale inhibitor in the pipe can be accurately described by testing the change of the conductivities at different positions.

Along with the flowing of the fluid, the lowest conductivity is gradually increased, because along with the flowing of the fluid, new calcium chloride solution continuously enters the fluid, so that the conductivity of the fluid is increased, and meanwhile, the concentration of the scale inhibitor is also reduced, thereby reducing the scale inhibition rate of the scale inhibitor.

The test instrument and the test method for dynamically measuring the performance of the scale inhibitor by the conductivity method can effectively simulate the scale inhibition process of the scale inhibitor in the flow in industrial production, and can accurately describe the scale inhibition performance and the migration condition of the scale inhibitor in a pipe aiming at different types of fluids.

the test instrument for dynamically measuring the performance of the scale inhibitor by the conductivity method and the test method thereof can be applied to the fields of petroleum, chemical industry, water treatment, storage and transportation, equipment maintenance and the like. The testing method is simple, convenient and quick, can provide guidance for scale prevention and removal, and has great practical significance for reducing production cost and maintaining equipment.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. an instrument for dynamically measuring the performance of a scale inhibitor is characterized by comprising a first conveying device, a second conveying device, a recovery device, a guide pipe, a guide rail, a conductivity testing device, a data acquisition device and a stopwatch;

The upper end of the guide pipe is provided with an opening;

The guide rail is positioned above the upper end opening of the guide pipe;

2. The apparatus for dynamically measuring the performance of an anti-scalant according to claim 1 wherein the first delivery means comprises a first delivery pipe, a first water tank, a first valve and a first flow meter, the first water tank being in communication with one end of the conduit through the first delivery pipe, the first valve and the first flow meter being mounted on the first delivery pipe.

3. The apparatus for dynamically measuring the performance of an anti-scaling agent according to claim 2, wherein a first bracket is arranged below the first water tank.

4. the apparatus for dynamically measuring the performance of an anti-scaling agent according to claim 2, wherein the first delivery pipe is further provided with a first buffer tank, and the first buffer tank is communicated with the first water tank.

5. The apparatus for dynamically measuring the performance of an anti-scalant according to claim 1 wherein the second delivery means comprises a second delivery pipe, a second water tank, a second valve and a second flow meter, the second water tank being in communication with one end of the conduit through the second delivery pipe, the second valve and the second flow meter being mounted on the second delivery pipe.

6. the apparatus for dynamically measuring the performance of an anti-scaling agent according to claim 5, wherein a second bracket is arranged below the second water tank.

7. The apparatus for dynamically measuring the performance of an anti-scaling agent according to claim 5, wherein the second delivery pipe is further provided with a second buffer tank, and the second buffer tank is communicated with the second water tank.

8. The apparatus for dynamically measuring the performance of an anti-scalant according to claim 1 wherein a catheter holder is provided below the catheter.

9. The apparatus for dynamically measuring the performance of an anti-scalant according to claim 1 wherein the data acquisition device comprises a data acquisition card and a computer, both the computer and the conductivity meter being electrically connected to the data acquisition card.