CA1218876A - Sampling system for water quality sensors - Google Patents
Sampling system for water quality sensorsInfo
- Publication number
- CA1218876A CA1218876A CA000458118A CA458118A CA1218876A CA 1218876 A CA1218876 A CA 1218876A CA 000458118 A CA000458118 A CA 000458118A CA 458118 A CA458118 A CA 458118A CA 1218876 A CA1218876 A CA 1218876A
- Authority
- CA
- Canada
- Prior art keywords
- water
- cleaning
- sampling
- pump
- valves
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Abstract
ABSTRACT OF THE DISCLOSURE
A samplying system for use in the analysis of water samples using quality sensors includes a device for intermittently supplying cleaning water containing ozone to the sensors, valves, pumps and related piping for cleaning the same.
A samplying system for use in the analysis of water samples using quality sensors includes a device for intermittently supplying cleaning water containing ozone to the sensors, valves, pumps and related piping for cleaning the same.
Description
EYE
BACKGROUND OF THE INVENTION
The present invention relates to a sampling system for use with water quality sensors used for monitoring the quality of water being treated in water purification or sewage treatment plants.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a schematic representation of the - conventional sampling system;
Fig. 2 shows a sampling system for a water quality sensor according to one embodiment of the present invention;
Fig. 3 shows one embodiment of the intermittent ozone generator used in the sampling system of Fig. 2; and Figs. 4 to 6 show other embodiments of the sample in system of the present invention.
A sampling system for use with water quality sensors is currently used in water purification or sewage treatment plants because 1) it facilitates the maintenance and management of the sensors, 2) the construction of the sensors requires it, and 3) great economy is realized by measuring the quality of water at many points using a single sensor. An example of a conventional sampling system is shown in Fig. 1, wherein the numeral 1 indicates a sampling port, 2 is a sampling pump, 3 is a sensor, 7 is a cleaning water tank, 6 and 7 are both automatic pipe cleaner elements, 8 is a sampling pump motor control center, and 9 and 10 are each drain pits. The automatic 1 pipe cleaner 6 consists of a pipe cleaning ball supplier pa, cleaning control valves 6b, 6c and Ed, and a cleaning control panel ye, whereas the cleaner 7 consists of a ball collector pa and cleaning control valves 7b and 7c.
Water sampled at port 1 with pump 2 is directed to sensor 3 through valve Boyle collector pa and valve 6b, and is thereafter discharged into pit 10. In this sampling mode, cleaning valves 6c, Ed and 7b are closed. In a pipe cleaning mode, sampling pump 2 is first stopped and cleaning pump 5 is actuated. At the sample time, cleaning valves, 6c and 7b are opened, and the cleaning water in tank 4 is directed through pump 5, valve -6c, ball supplier pa, ball collector pa and valve 7b and is discharged into pit 9. In this cleaning mode, pipe cleaning balls are delivered from supplier pa and as they are carried along by the cleaning water traveling to ball collector pa, the balls clean the intermediate piping. Valve pa controls the flow of the cleaning water and directs any returning flow to- pit 10. The sequence of the above steps is controlled by control panel ye and control center 8.
The conventional sampling system has the follow-in defects: lo the balls must be supplied and collected manually; 2) cleaning with the balls is possible only when the piping has smooth inner walls, and 3) the balls cannot pass through the sensor, valves and the piping around it, ' - . ; .
12~8876 1 the sampling pump or sampling port, so these areas cannot be cleaned with the balls. For these reasons, much labor is needed in cleaning operations and frequent periodical cleaning is necessary.
SUMMARY OF THE INVENTION
Therefore, one object of the present invention is to provide a device for keeping the sampling system and water quality sensors clean over an extended period.
Another object of the invention is to provide a device that causes ozone-containing sterilizing water to flow continuously or intermittently through the sampling system not only to prevent the deposition of contaminants (e.g. algae, organic matter and sludge) on various parts of the system but also-to clean off any contaminant.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
One embodiment of the sampling system according to the present invention is shown in Fig. 2, wherein the numeral lo represents a sampling port A, lb is a sampling port B, pa and 2b are sampling pumps, 3 is a sensor, 4 is - a submerged sensor, 5 is a water receiving tank, 6 is a -12~876 drain pipe connected to the water receiving tank, 7 is a cleaning water tank, 8 is a cleaning pump, and 9 is an automatic sampling system cleaner. At 10 is shown is an intermittent ozone generator whose construction is shown in Fig. 3, ha and fib are cleaning water drain valves, 12 is a sampling pump motor center, and 13 is a drain pit.
The automatic sampling system cleaner 9 includes an ejector pa for injecting ozone into water used for flushing the system, an ejector pump 9b, cleaning control valves 9c, Ed, ye and 9g, and a cleaning control panel of.
One embodiment of the intermittent ozone generator 10 is shown in Fig. 3, wherein aye indicates an ozonizer, 10b is a column filled with silica gel for adsorbing ozone, 10c is an oxygen circulating blower, eye and 10d are circular lion control valves, 10f is a refrigerator for the adsorbing column, 10g is a tank fillet with hot brine used to resorb ozone from the silica gel, 10h is a brine supply pump, 10i is an ozone injection valve, and 14 is an oxygen container from which oxygen is supplied to ozone generator 10.
Referring to Fig. 2, water sampled at sampling port lo using the pump pa is directed through valves ha, 9c and Ed to sensor 3 and sensor 4 submerge* in the tank 5.
The water is then discharged into drain pit 13 through an overflow mechanism in tank 5. Before sampling water at port lb, the pump pa is stopped, valves ha and 9c are 1~18876 closed, and drain valve 6 is opened to discharge theater sampled at port lay Then, pump 2b is actuated and valves fib and 9g are opened to sample water at port lb.
Sampling at port lo alternates with the sampling at port lb in the manner described above. Throughout the sampling mode, valve ye remains closed.
Let us assume that sampling at point B has been completed and that pump 2b is stopped and valves fib and 9g are closed. To start the cleaning mode, the sampling pump pa is stopped and at the same time, valves 9c and ha are closed Then, the cleaning pump 8 is actuated and valve ye is opened. At this time, drain valve 6 remains closed.
Then, the intermittent ozone generator 10 and ejector pump go are actuated, and ozone is injected from ejector pa into the cleaning water in tank 7. Ozone-containing cleaning water is then forced by pump 8 and sent toward sensor 3 and :
submerged sensor 4 through valve Ed to clean off any deposits fouling the sensors. By opening drain valve 6, the inside of tank 5 and valve 6 can also be cleaned.
Next, valves 9c and ha are opened whereas valves Ed and 6 are closed. This causes the ozone-contain-in water to pass through valves 9c and ha and be disk charged into sampling port lo through pump pa. Then, valves 9c and ha are closed and valves 9g and fib are opened to supply the cleaning water through sampling port ~2~8876 lb through pump 2b. By this procedure, the sampling piping and pumps pa and 2b are cleaned. After the cleaning operation, valve ye is closed and pump 8, ejector pump 9b and the intermittent ozone generator 10 are stopped. The entire cleaning sequence is controlled by the control panel of end control center 12.
Referring to Fig. 3, the operation of the inter-mitten ozone generator 10 will now be described. Oxygen from container 14 is oceanside in ozonizer aye by silent discharge and is forced into the adsorbing column 10b by circulation blower 10c through valve 10d. In the adsorbing column, ozone is selectively adsorbed by the silica gel.
To increase the efficiency of adsorption, the adsorption :
column is cooled with the refrigerator 10f. Oxygen that has not been adsorbed on the silica gel is forced by the blower 10c and directed to the ozonizer through valve eye. The ozonizer is continuously operated and the ozone produced gradually builds up in the adsorbing column. The adsorbed ozone can be resorbed by forcing hot brine from brine tank 10g into the adsorbing column 10b by means of pump 10h, with valves eye and 10d being closed and the adsorbing column evacuated by ejector pa. The resorbed ozone is ejected into water to form ozone-containing water to be again used as cleaning water.
The intermittent ozone generator used in the lZ11~76 embodiment of Fig. 2 may be replaced by an ordinary ozone generator to effect the present invention in a simpler form which is illustrated in Fig. 4. In the embodiment of Fig. 4, ozone produced by ozone generator 10 is directly fed to the cleaning water tank 7 where it is introduced into the water to form ozone-containing cleaning water. The operation of this ozone generator is substantially the same as that of the generator shown in Fig. 3.
The present invention is very effective for use in the case where water is sampled at two or more points, and different types of sensors are used. The desired areas can be cleaned successively with a single cleaning system, as shown in Fig. 5. The embodiment of Fig. 5 relates to the case where sampling at many points of a single body of water It is carried out, but the same principle applies to the case where sampling is performed on a plurality of such bodies.
Fig. 5 includes a cleaning sampling control panel of capable of controlling sampling at spots lay lb and to, a panel of instruments 16 for analyzing the quality of the sampled water based on the data from sensors pa, 3b and 3c, a data selection panel 17 for keying the data from the sensors with the sampling spots, and a telemetering station 18 for recording the obtained data or sending it to a remote station. The embodiment of Fig. 5 relates to the sequential control of two or more sampling systems, and the principle ~2~876 of controlling one specific sampling system is the same as that described in connection with Fig. 2.
In another embodiment of the present invention, a plurality of sampling pumps can be integrated into one pump which also serves as a cleaning pump, such as simplified system being shown in Fig. 6, which includes a sampling/
cleaning pump 8. In a cleaning mode, cleaning water from tank 7 is directed to sensor 4 through valves ye and Ed, with valves 9c and oh closed. The water cleans sensor 4, as well as water receiving tank 5 and drain valve 6 in the manner describe din connection with Fig. 2. Subsequently, valve Ed is closed and valve oh is opened to flush the cleaning water through valves oh and ha, or fib or tic to clean the sampling piping as well as these valves.
The present invention provides an effective device preventing the buildup of foul matter in a water quality sampling system which also cleans off any foul buildup automatically. The device enables very simple cleaning of the sampling system and sensors, which has conventionally involved much labor and has been considered a very dirty job. Through the cleaning of sensors and associated piping and valves, the invention contributes greatly to the main-tenancy and management of the sensors, and hence the precise control of various factors (e.g. chemical dosing, MUSS and DO the water of being treated in water purification and sewage treatment plants.
BACKGROUND OF THE INVENTION
The present invention relates to a sampling system for use with water quality sensors used for monitoring the quality of water being treated in water purification or sewage treatment plants.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a schematic representation of the - conventional sampling system;
Fig. 2 shows a sampling system for a water quality sensor according to one embodiment of the present invention;
Fig. 3 shows one embodiment of the intermittent ozone generator used in the sampling system of Fig. 2; and Figs. 4 to 6 show other embodiments of the sample in system of the present invention.
A sampling system for use with water quality sensors is currently used in water purification or sewage treatment plants because 1) it facilitates the maintenance and management of the sensors, 2) the construction of the sensors requires it, and 3) great economy is realized by measuring the quality of water at many points using a single sensor. An example of a conventional sampling system is shown in Fig. 1, wherein the numeral 1 indicates a sampling port, 2 is a sampling pump, 3 is a sensor, 7 is a cleaning water tank, 6 and 7 are both automatic pipe cleaner elements, 8 is a sampling pump motor control center, and 9 and 10 are each drain pits. The automatic 1 pipe cleaner 6 consists of a pipe cleaning ball supplier pa, cleaning control valves 6b, 6c and Ed, and a cleaning control panel ye, whereas the cleaner 7 consists of a ball collector pa and cleaning control valves 7b and 7c.
Water sampled at port 1 with pump 2 is directed to sensor 3 through valve Boyle collector pa and valve 6b, and is thereafter discharged into pit 10. In this sampling mode, cleaning valves 6c, Ed and 7b are closed. In a pipe cleaning mode, sampling pump 2 is first stopped and cleaning pump 5 is actuated. At the sample time, cleaning valves, 6c and 7b are opened, and the cleaning water in tank 4 is directed through pump 5, valve -6c, ball supplier pa, ball collector pa and valve 7b and is discharged into pit 9. In this cleaning mode, pipe cleaning balls are delivered from supplier pa and as they are carried along by the cleaning water traveling to ball collector pa, the balls clean the intermediate piping. Valve pa controls the flow of the cleaning water and directs any returning flow to- pit 10. The sequence of the above steps is controlled by control panel ye and control center 8.
The conventional sampling system has the follow-in defects: lo the balls must be supplied and collected manually; 2) cleaning with the balls is possible only when the piping has smooth inner walls, and 3) the balls cannot pass through the sensor, valves and the piping around it, ' - . ; .
12~8876 1 the sampling pump or sampling port, so these areas cannot be cleaned with the balls. For these reasons, much labor is needed in cleaning operations and frequent periodical cleaning is necessary.
SUMMARY OF THE INVENTION
Therefore, one object of the present invention is to provide a device for keeping the sampling system and water quality sensors clean over an extended period.
Another object of the invention is to provide a device that causes ozone-containing sterilizing water to flow continuously or intermittently through the sampling system not only to prevent the deposition of contaminants (e.g. algae, organic matter and sludge) on various parts of the system but also-to clean off any contaminant.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
One embodiment of the sampling system according to the present invention is shown in Fig. 2, wherein the numeral lo represents a sampling port A, lb is a sampling port B, pa and 2b are sampling pumps, 3 is a sensor, 4 is - a submerged sensor, 5 is a water receiving tank, 6 is a -12~876 drain pipe connected to the water receiving tank, 7 is a cleaning water tank, 8 is a cleaning pump, and 9 is an automatic sampling system cleaner. At 10 is shown is an intermittent ozone generator whose construction is shown in Fig. 3, ha and fib are cleaning water drain valves, 12 is a sampling pump motor center, and 13 is a drain pit.
The automatic sampling system cleaner 9 includes an ejector pa for injecting ozone into water used for flushing the system, an ejector pump 9b, cleaning control valves 9c, Ed, ye and 9g, and a cleaning control panel of.
One embodiment of the intermittent ozone generator 10 is shown in Fig. 3, wherein aye indicates an ozonizer, 10b is a column filled with silica gel for adsorbing ozone, 10c is an oxygen circulating blower, eye and 10d are circular lion control valves, 10f is a refrigerator for the adsorbing column, 10g is a tank fillet with hot brine used to resorb ozone from the silica gel, 10h is a brine supply pump, 10i is an ozone injection valve, and 14 is an oxygen container from which oxygen is supplied to ozone generator 10.
Referring to Fig. 2, water sampled at sampling port lo using the pump pa is directed through valves ha, 9c and Ed to sensor 3 and sensor 4 submerge* in the tank 5.
The water is then discharged into drain pit 13 through an overflow mechanism in tank 5. Before sampling water at port lb, the pump pa is stopped, valves ha and 9c are 1~18876 closed, and drain valve 6 is opened to discharge theater sampled at port lay Then, pump 2b is actuated and valves fib and 9g are opened to sample water at port lb.
Sampling at port lo alternates with the sampling at port lb in the manner described above. Throughout the sampling mode, valve ye remains closed.
Let us assume that sampling at point B has been completed and that pump 2b is stopped and valves fib and 9g are closed. To start the cleaning mode, the sampling pump pa is stopped and at the same time, valves 9c and ha are closed Then, the cleaning pump 8 is actuated and valve ye is opened. At this time, drain valve 6 remains closed.
Then, the intermittent ozone generator 10 and ejector pump go are actuated, and ozone is injected from ejector pa into the cleaning water in tank 7. Ozone-containing cleaning water is then forced by pump 8 and sent toward sensor 3 and :
submerged sensor 4 through valve Ed to clean off any deposits fouling the sensors. By opening drain valve 6, the inside of tank 5 and valve 6 can also be cleaned.
Next, valves 9c and ha are opened whereas valves Ed and 6 are closed. This causes the ozone-contain-in water to pass through valves 9c and ha and be disk charged into sampling port lo through pump pa. Then, valves 9c and ha are closed and valves 9g and fib are opened to supply the cleaning water through sampling port ~2~8876 lb through pump 2b. By this procedure, the sampling piping and pumps pa and 2b are cleaned. After the cleaning operation, valve ye is closed and pump 8, ejector pump 9b and the intermittent ozone generator 10 are stopped. The entire cleaning sequence is controlled by the control panel of end control center 12.
Referring to Fig. 3, the operation of the inter-mitten ozone generator 10 will now be described. Oxygen from container 14 is oceanside in ozonizer aye by silent discharge and is forced into the adsorbing column 10b by circulation blower 10c through valve 10d. In the adsorbing column, ozone is selectively adsorbed by the silica gel.
To increase the efficiency of adsorption, the adsorption :
column is cooled with the refrigerator 10f. Oxygen that has not been adsorbed on the silica gel is forced by the blower 10c and directed to the ozonizer through valve eye. The ozonizer is continuously operated and the ozone produced gradually builds up in the adsorbing column. The adsorbed ozone can be resorbed by forcing hot brine from brine tank 10g into the adsorbing column 10b by means of pump 10h, with valves eye and 10d being closed and the adsorbing column evacuated by ejector pa. The resorbed ozone is ejected into water to form ozone-containing water to be again used as cleaning water.
The intermittent ozone generator used in the lZ11~76 embodiment of Fig. 2 may be replaced by an ordinary ozone generator to effect the present invention in a simpler form which is illustrated in Fig. 4. In the embodiment of Fig. 4, ozone produced by ozone generator 10 is directly fed to the cleaning water tank 7 where it is introduced into the water to form ozone-containing cleaning water. The operation of this ozone generator is substantially the same as that of the generator shown in Fig. 3.
The present invention is very effective for use in the case where water is sampled at two or more points, and different types of sensors are used. The desired areas can be cleaned successively with a single cleaning system, as shown in Fig. 5. The embodiment of Fig. 5 relates to the case where sampling at many points of a single body of water It is carried out, but the same principle applies to the case where sampling is performed on a plurality of such bodies.
Fig. 5 includes a cleaning sampling control panel of capable of controlling sampling at spots lay lb and to, a panel of instruments 16 for analyzing the quality of the sampled water based on the data from sensors pa, 3b and 3c, a data selection panel 17 for keying the data from the sensors with the sampling spots, and a telemetering station 18 for recording the obtained data or sending it to a remote station. The embodiment of Fig. 5 relates to the sequential control of two or more sampling systems, and the principle ~2~876 of controlling one specific sampling system is the same as that described in connection with Fig. 2.
In another embodiment of the present invention, a plurality of sampling pumps can be integrated into one pump which also serves as a cleaning pump, such as simplified system being shown in Fig. 6, which includes a sampling/
cleaning pump 8. In a cleaning mode, cleaning water from tank 7 is directed to sensor 4 through valves ye and Ed, with valves 9c and oh closed. The water cleans sensor 4, as well as water receiving tank 5 and drain valve 6 in the manner describe din connection with Fig. 2. Subsequently, valve Ed is closed and valve oh is opened to flush the cleaning water through valves oh and ha, or fib or tic to clean the sampling piping as well as these valves.
The present invention provides an effective device preventing the buildup of foul matter in a water quality sampling system which also cleans off any foul buildup automatically. The device enables very simple cleaning of the sampling system and sensors, which has conventionally involved much labor and has been considered a very dirty job. Through the cleaning of sensors and associated piping and valves, the invention contributes greatly to the main-tenancy and management of the sensors, and hence the precise control of various factors (e.g. chemical dosing, MUSS and DO the water of being treated in water purification and sewage treatment plants.
Claims
1. In a sample system including means for directing water samples to at least one water quality sensor for analysis, the improvement comprising:
means for supplying ozone-containing cleaning water to areas of said system which come into contact with said water samples, said samples being taken at more than one sampl-ing point and being sequentially directed to a plurality of said sensors, and said sample system further including sampling pump means proximate each said sampling point, and cleaning pump means for directing said cleaning water through said areas.
means for supplying ozone-containing cleaning water to areas of said system which come into contact with said water samples, said samples being taken at more than one sampl-ing point and being sequentially directed to a plurality of said sensors, and said sample system further including sampling pump means proximate each said sampling point, and cleaning pump means for directing said cleaning water through said areas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000458118A CA1218876A (en) | 1984-07-04 | 1984-07-04 | Sampling system for water quality sensors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000458118A CA1218876A (en) | 1984-07-04 | 1984-07-04 | Sampling system for water quality sensors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1218876A true CA1218876A (en) | 1987-03-10 |
Family
ID=4128240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000458118A Expired CA1218876A (en) | 1984-07-04 | 1984-07-04 | Sampling system for water quality sensors |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1218876A (en) |
-
1984
- 1984-07-04 CA CA000458118A patent/CA1218876A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |