Smar Guided Wave Level Transmitter . Application in the Riviera de São Lourenço – Bertioga - SP. Application In the Effluent Treatment Stations (ETEs), the sewer of the city is captured initially in an aeration tank where, after a maturation phase, it is transported through a communicating underground network to biological treatment ponds. There, the seaweed organic action will eliminate a large part of the bacteria in the process that will go to subsequent phases for chemical treatment disinfection Water and sewage treatment stations are ideal places for RD400 application, because most processes are run in water – the liquid with one of the best dielectrics in existence. Other devices commonly used in this type of plant are ultrasound meters. The great advantage of the RD400 in relation to this equipment is that there is not inaccurate measurement due to false echoes (improper reflections caused by obstacles as walls and the bottom of the reservoirs), since the waves of RD400 are guided without power loss. At Amigos da Riviera treatment station, it was necessary to measure a spillway flow located in a pond as the one mentioned before. To calculate this parameter, which depends on the spilled water type, one must have the value of the water level. That level is monitored by the Smar transmitter. With this value, it is determined the chemical dosage to be added to the water to remove pond scums, a process carried out after the decantation phase where the RD400 was installed, and the treatment ends. Previously, level measuring was done directly with a ruler, wasting chemical products used in treatment and also in the time spent. Installation Spillway to the biological treatment pond water flow wood lath rectangular spillway The radar was installed with a dual rod and a 20 cm flange. On this project, an adaptable support was fixed to the spillway structure, so that the equipment could be installed in its center. An advantage of that type of support is that it strengthens the return of the waves, as it becomes a third guide for the reflections.
Transcript
Smar Guided Wave Level Transmitter .Application in the Riviera de São Lourenço – Bertioga - SP.
ApplicationIn the Effluent Treatment Stations (ETEs), the
sewer of the city is captured initially in an aeration tank where, after a maturation phase, it is transported through a communicating underground network to biological treatment ponds.
There, the seaweed organic action will eliminate a large part of the bacteria in the process that will go to subsequent phases for chemical treatment disinfection
Water and sewage treatment stations are ideal places for RD400 application, because most processes are run in water – the liquid with one of the best dielectrics in existence. Other devices commonly used in this type of plant are ultrasound meters. The great advantage of the RD400 in relation to this equipment is that there is not inaccurate measurement due to false echoes (improper reflections caused by obstacles as walls and the bottom of the reservoirs), since the waves of RD400 are guided without power loss.
At Amigos da Riviera treatment station, it was necessary to measure a spillway flow located in a pond as the one mentioned before. To calculate this parameter, which depends on the spilled water type, one must have the value of the water level. That level is monitored by the Smar transmitter.
With this value, it is determined the chemical dosage to be added to the water to remove pond scums, a process carried out after the decantation phase where the RD400 was installed, and the treatment ends.
Previously, level measuring was done directly with a ruler, wasting chemical products used in treatment and also in the time spent.
Installation
Spillway to the biological treatment pond www.smar.com
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The radar was installed with a dual rod and a 20 cm flange. On this project, an adaptable support was fixed to the spillway structure, so that the equipment could be installed in its center. An advantage of that type of support is that it strengthens the return of the waves, as it becomes a third guide for the reflections.
02 03
The RD400 uses the Time Domain Reflectometry (TDR) technology, principle used in civil construction, telecommunication, agriculture, among other areas, and recently in level measuring in industrial processes.
This principle is based on the concept that electromagnetic waves, guided in a certain ambient (in the case of RD400, its probes), suffer reflection when meeting other ambient with different dielectric constant, due to the change in impedance
The RD400 depends originally of the ambient dielectric constant whose level is measured. For humid ambients, the wave reflection improves significantly due to the high dielectric constant of the water.
Elements as dust, internal obstacles to the tank (level keys, filters, etc.), bubbles on the surface, among others, are most times ignored by the equipment, since the waves are guided by probes, without loss of power.
For each type of process, there will be the need for a different probe, which can be a single or dual rod, a single or dual cable or even a coaxial terminal. What will determine which will be the probe type are parameters as the tank height, the installation or not of RD400 in the communicating vessels, the dielectric constant of the process, among others. Consult our representatives for more information.
Features
RD400 in operation.
According to the reflection graph, the quality of the signal was satisfactory, which always means more robustness for the transmitter operation, through the continuous monitoring without wave reflection failures.
Sensor Threshold Level parameter reflection graph
The application is relatively simple: it doesn’t need any installation in the communicating vessels; the level measuring is performed in still water; it doesn’t require special care as metal sheet or flange grounding bigger than normal (20mm of diameter), coaxial probes (used for low dielectric), etc.
In this case, the great advantage of the equipment is the “top installation”, where the access to the bottom of the reservoir (where there is not point for installation) is not necessary and also the guaranteed quality of the reflections, since in this case meters of free wave can generate false echoes due to obstacles in the spillway, for example.
Conclusion
Below the testimonial of Daniel Ribeiro, technical coordinator of the Riviera de São Lourenço - Bertioga/SP effluents treatment station regarding the RD400.
Which the difficulties that you had before for level measurement?
The great difficulty appeared from the implementation of a new stage in the system, where flow measuring automation is necessary.
The RD400 in the effluent treatment ponds. Detail with lateral viewof the installation
Besides that advantage, there is also the high dielectric of the process.
Testimonial
Daniel Ribeiro, technical coordinator of the station.
What benefits the RD400 brought to your process?
It made possible the level measurement of the water layer above the spillway and then turn it into flow, and the application of chemical products more efficient.
Do you recommend the RD400 Smar?I do! One of the major points of the equipment is the
display reading - in our area we are accustomed to use only ultrasound meters that doesn’t have that feature and many others that the radar presents.
interestlevel
02 03
The RD400 uses the Time Domain Reflectometry (TDR) technology, principle used in civil construction, telecommunication, agriculture, among other areas, and recently in level measuring in industrial processes.
This principle is based on the concept that electromagnetic waves, guided in a certain ambient (in the case of RD400, its probes), suffer reflection when meeting other ambient with different dielectric constant, due to the change in impedance
The RD400 depends originally of the ambient dielectric constant whose level is measured. For humid ambients, the wave reflection improves significantly due to the high dielectric constant of the water.
Elements as dust, internal obstacles to the tank (level keys, filters, etc.), bubbles on the surface, among others, are most times ignored by the equipment, since the waves are guided by probes, without loss of power.
For each type of process, there will be the need for a different probe, which can be a single or dual rod, a single or dual cable or even a coaxial terminal. What will determine which will be the probe type are parameters as the tank height, the installation or not of RD400 in the communicating vessels, the dielectric constant of the process, among others. Consult our representatives for more information.
Features
RD400 in operation.
According to the reflection graph, the quality of the signal was satisfactory, which always means more robustness for the transmitter operation, through the continuous monitoring without wave reflection failures.
Sensor Threshold Level parameter reflection graph
The application is relatively simple: it doesn’t need any installation in the communicating vessels; the level measuring is performed in still water; it doesn’t require special care as metal sheet or flange grounding bigger than normal (20mm of diameter), coaxial probes (used for low dielectric), etc.
In this case, the great advantage of the equipment is the “top installation”, where the access to the bottom of the reservoir (where there is not point for installation) is not necessary and also the guaranteed quality of the reflections, since in this case meters of free wave can generate false echoes due to obstacles in the spillway, for example.
Conclusion
Below the testimonial of Daniel Ribeiro, technical coordinator of the Riviera de São Lourenço - Bertioga/SP effluents treatment station regarding the RD400.
Which the difficulties that you had before for level measurement?
The great difficulty appeared from the implementation of a new stage in the system, where flow measuring automation is necessary.
The RD400 in the effluent treatment ponds. Detail with lateral viewof the installation
Besides that advantage, there is also the high dielectric of the process.
Testimonial
Daniel Ribeiro, technical coordinator of the station.
What benefits the RD400 brought to your process?
It made possible the level measurement of the water layer above the spillway and then turn it into flow, and the application of chemical products more efficient.
Do you recommend the RD400 Smar?I do! One of the major points of the equipment is the
display reading - in our area we are accustomed to use only ultrasound meters that doesn’t have that feature and many others that the radar presents.
interestlevel
Many industrial applications are run in the presence of vapors, density and process temperature change, as well as access difficulties and installation in the bottom part of reservoirs.
The same applies for the sugar/ethanol sector. In many cases, the job is measuring the process level as described above, and solutions as load cells or free wave meters require special installation cares, or simply are not fit for some applications.
The level meter technology by the TDR (Time Domain Reflectometry) principle, also known as Guided Wave Radars, is one of the most modern existing in the industrial automation market. This technology appeared as a solution to fill gaps that other meters did not entirely do.
The new RD400, Smar’s Guided Wave Radar, has already been installed at several sugar plants and distilleries, in all over Brazil. These notes clarify some points that made successful RD400 cases in this segment.
Smar Guided Wave Level Transmitter .Application in Plants and Distilleries.
IntroductionLocation: JPilon S/A Açúcar e Álcool -
Cerquilho-SP
Besides the vinaza, which is supplied to farm areas as fertilizer, many industrial effluents are deposited in plant tanks and have the same use. Usually, they are composed by such elements as:
• residual water from distillation (flegmaça); • boiler discharge water; • wash of the sugar production section.At Usina J. Pilon S/A Açúcar e Álcool,
located in Cerquilho, São Paulo state, a tank stores all those effluents. Next, the effluents are pumped to cooling towers, where a water spray cools them down and they are sent for irrigation.
Both at the cooling tower and in the last tank, the level control should be careful, because it cannot overflow and cause the process to stop. In the first tank, where the effluents are received from the plant, a minimum level must be kept at to avoid pump cavitation. The RD400 is installed in the first effluent tank, as shown in the following sketch.
The RD400 guarantees reliability and accuracy in level measuring in sugar and ethanol plants, as well as in other segments.
Free from density and temperature variations, the presence of bubbles, false echoes common in non-guided waves (as in microwaves or ultrasound transmitters), and the possibility of being installed on the lower part of the tanks, the RD400 just needs that its probe is submerged in the process to be measured, and that process needs a minimum dielectric constant so that the guided waves reflect back to the equipment. The presence of water, as mentioned before, is a guarantee of high dielectrics.
Besides, the RD400 has the advantage of being installed on top, which makes possible to easily access its electronics, as well as its simplified maintenance. Most industrial tanks already have on their top sockets, inspection points or flanges for installing other equipments, where the radar can be adapted.
Effluents
RD400 provides a new measuring technology for the industrial automation market, but one that is already in use in civil construction, telecommunications, agriculture, chemistry, among other areas. The Time Domain Reflectometry (TDR) concept, based on the reflection of electromagnetic waves in process surfaces offers them impedance change. It is a world accepted principle and one totally adapted to industries, to supply what other level measuring types could not meet.
For each type of process there will be the need for a different probe, which can be a single or dual rod, a single or dual cable or a coaxial terminal. Parameters as tank height, the installation or not of the RD400 in a communicating vessel to a reservoir, the dielectric constant of the process, etc. will determine which type of probe it will be. Consult our representatives for more information.
Coaxial (1-3m)
Dual Rod (1-8m)
Dual Cable (1-14m)
Single Rod (1-8m)
Single Cable (1-14m)
Tri-Clamp Connectionwith Polished Rod
(1-4m)
smarSpecifications and information are subject to change without notice.
Up-to-date address information is available on our website.
