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Compressed air uses more electricity than any other type of equipment, and accounts for as much as a third of the energy usage in an industrial facility. Compressed air flow measurement in the industrial environment helps to track overall usage and identify leaks in compressed air systems, to help departments reduce consumption and improve plant efficiency. This can save a lot of energy and money each month in large industrial plants by reducing energy costs. Insertion Type Thermal Mass Flow Meters is a perfect tool to measure compressed airflow.

Compressed air uses more electricity than any other type of equipment, and accounts for as much as a third of the energy usage in an industrial facility.

Compressed air flow measurement in the industrial environment helps to track overall usage and identify leaks in compressed air systems, to help departments reduce consumption and improve plant efficiency.

This can save a lot of energy and money each month in large industrial plants by reducing energy costs. Insertion Type Thermal Mass Flow Meters is a perfect tool to measure compressed airflow.

Choosing a flowmeter that creates low permanent pressure loss is most important in Compressor’s & Blowers’ requirements can reduce energy loss, increase efficiency & saves money.

Airflow rate measurement & control is utmost in the textile, automobile, steel and power, chemical & pharmaceuticals process.

Selecting an appropriate flow measurement technique can be a daunting task. If we are aware of technologies that are suitable for a particular application, minimizing energy costs can help narrow the choice.

Pressure drop loss is a major concern as example Orifice flowmeter has approx 2psi -3psi pressure loss which is equal to 1-1.5% energy loss.

LEOMI thermal mass (calorimetric) flowmeters work on the physical principle of thermal dispersion from a heated element to the ambient medium (e.g. air or gases). And it is a proven technology that provides great savings in energy costs by almost No permanent pressure loss & high turndown ratio to the plant operators hence helping in optimizing its process.

For each gas flow meter application that demands gas flow measurement, different challenges might arise that require careful attention and consideration. Some of them include:

• Capability to measure low and high flows: Required to measure the high and lower level of gas flows with precision.
• Compatibility to the size: Special consideration should be taken as to the suitability of each flow-meter component to the implemented place, small or large.
• Durability to environment and hazards: Environmental conditions that a flow sensor must reliably operate in.
• Exact calibration to actual process conditions: It is essential for undisturbed operations.

Here are a few applications for Gas Flow Meters:

1. Compressed Air
2. Food Industries
3. Chemical Applications
4. Natural gas supplies
5. Power Utilities

Different Types of Gas Flow Meters in India

1. Thermal mass flow meter

Thermal mass flow meters, thermal dispersion or immersible mass flow meters, or gas flow meters, are a type of instrument for measuring the rate at which fluid (usually air) passes through a pipe. The thermal part refers to the fact that the device is heated and differential (not absolute) in pressure across it will cause flow because of this temperature gradient, i.e., if the side without a pressure difference is hotter than the other side, then the flow will occur from hot to cold.

2. Differential Pressure Based Flow Meter

Differential Pressure flow meters measure velocities in fluids by reading the pressure loss across a pipe constriction. These meters can employ laminar plates, nozzles, or Venturi tubes to create an artificial constriction.

3. Coriolis flow meter

Coriolis mass flow meters are very useful to have around. It’s helpful when you have a large amount of liquid or even gas that needs to be measured. Coriolis mass flow meters help you get a good idea about how much fluid is passing through, and in which direction too. These meters are typically made out of metal, though there are versions available that can be used with liquids and gases that don’t react well to metal.

4. Turbine flow meter

A turbine Flow Meter is an instrument used to measure liquid flow in pipelines and tanks. It is also known as a rotating impeller flowmeter. The turbine meter uses the principle of measuring the rotary motion of a turbine, into an electrical signal.

5. Ultrasonic Flow Meter (Clamp-on Type)

Ultrasonic clamp-on flow meters measure flow to determine the transit time of a liquid or gas. Using sound waves for measurement, ultrasounds can accurately monitor changes in flow. Ultrasonic clamp-on flow meters are used for primary applications involving liquids, gasses, and other substances

6. Vortex Flow Meter

Vortex flowmeters operate using vortex shedding to determine the amount of water flow. The technology is based on the principle that vortexes are shed when an oscillating fluid flows past a bluff body, such as a sphere or disk which has been inserted into the fluid flow.

How to monitor flue gas flow rate accurately with a large stack diameter?

Leomi-586 A single point Insertion thermal mass flow meter for a larger duct or stack diameter may not provide an accurate average velocity profile, for this purpose Leomi recommends using multiple instruments across flow profile for better averaging.

As per installation standards suggestion, multiple thermal flow sensors can be mounted at equal distance in duct for achieving better accuracy.

Importance of Flue Gas Flow Measurement :

Most flue gases emission contains air pollutants that are harmful to human health.

So continuous emission monitoring systems (CEMS) are mandatory for providing reporting to the state & central pollution control board for environmental pollution control. Also, if flue-gas flow measurement is effectively done industries can take predictive & preventive measures for optimizing their process efficiency and reducing harmful emissions in the environment.

Food & Beverage industry production has various processes depending upon raw materials such as juice concentrates, grains, milk products. The typical process involves cleaning, blending, sterilization, fermentation, drying, cooling, filtration, packaging of the finished products.

In various processes compressed airplay’s a vital role in conveying raw materials and also steam boiler for the heating & sterilization process is of prime importance. Also, the wastewater treatment process also needs to be optimized. Organic waste in the food & beverage wastewater treatment process generates biogas which is recovered for use in Boiler fuel.

LEOMI WITH ITS INSERTION THERMAL MASS FLOW METER RANGE HELPS TO OPTIMIZE THE F&B PRODUCTION PROCESS

• Monitoring & control of Compressed air used in various processes & saving energy
• Ideal monitoring of low-pressure Biogas generated in wastewater treatment
• Boiler Air-fuel ratio control for optimum boiler efficiency
• Aeration air flow through diffuser membrane system to optimize dissolved oxygen rate

Thanks to modern technology, a wastewater treatment plant has now been able to measure and record the waste gas flowing from the digesters (aka the fermenter room) to the boiler room burners and to a flare stack in real-time. This helps them monitor how well they’re able to handle their wastes while guaranteeing that they don’t violate environmental standards.

Due to environmental reasons, Sewage generated on-board cannot be discharged to the sea without proper treatment.

Most often onboard sewage treatment plants rely on biological Decomposition. Flow measurement at various stages of the plant is crucial to ensure an efficient process.

Thermal mass flow meters provide accurate gas flow measurement and monitoring of air, oxygen, ozone, and digester gases present in wastewater treatment plants.

Leomi Thermal Mass Flowmeter has below features that help you to get an accurate measurement of wastewater :

• High accuracy throughout temperature ranges up to 400⁰C
• Programmable pipe diameters from 15 mm to 10000 mm
• Probes with Ø=12mm & Lengths up to 2000 mm are available
• Circular, Square, Rectangular, and other ducts mounting possible
• Easy Installation & maintenance
• Integration in the data network with different data converters is possible
• In-built standard gas database for a selection.

Thermal Mass Flow Meter :

A thermal mass flow meter is an easy-to-use tool one must have if they’d like to accurately check air pollution levels at a wastewater treatment plant. Choosing a thermal mass flow meter for their aeration system allows the people who work at the plant to calculate their energy needs more easily and manage their energy consumption in more efficient ways so that they can save money on electricity bills but also lessen their carbon footprint.

Aeration lane air controls are the most imperative as lower or no air supply causes bacterial death due to starvation for oxygen & inefficient treatment whereas very high air supply increases too much bacterial growth in-turn bacteria gets hungry and dies & also increase energy cost.

Air flow meters come in handy for optimizing aeration control by measuring aeration airflow to address the need to control oxygen flow rate requirements for optimizing BOD & Energy cost in Effluent Water Treatment Plant.

LEOMI thermal dispersion technology is the supported innovation for measuring aeration airflow at plants where wastewater is dealt with Large scale Municipal Sewage Treatment, Common Effluent Treatment Plants (CETP), small industrial effluent treatment.