SILVER AUTOMATION INSTRUMENTS LTD.
Product Category

By Media
Flow Meter

Gas Monitoring, Scrubber Balancing, and Nitrogen Balancing


Some of the important applications in the chemical and petrochemical industries that are carried out using thermal mass flowmeters are-

  • Flare and flue gas monitoring
  • Scrubber balancing
  • Nitrogen Blanketing

In this article, each of these applications has been explained in detail.

1. Flare gas monitoring

A wide range of flow rates means that monitoring flare gas is challenging and can give rise to several problems. The normal flow rate of the flare gas is zero. However, when there is venting to the flare due to the pressure in the separator, there is a spike in the flow rate before it returns to zero with the release of the pressure. Additionally, this can cause a dramatic change in temperatures and the composition of the gas.

Thermal dispersion mass flow meters are most commonly used for flare gas monitoring because it gives the following advantages.

There is no requirement for external calibration for temperature and pressure correction because thermal flow meters provide direct mass flow measurement. The thermal mass flow meter measures a wide range of velocities have the ability for ultra-low velocity measurements. In fact, thermal flow meter sensors can capture velocities as low as 10SFPM and as high as 40,000 SFPM (sometimes higher with the use of a specialized shield). This huge range is beneficial when it comes to flare gas flow rate monitoring. For example, some brand thermal flowmeter can be calibrated for two conditions, both extreme in nature. One channel is for the vent gas and the other for capturing the upset state. The user's end system can then easily maneuver this by switching channels automatically; using a contact closure on the terminals. Our 3/4" rugged  flow sensor can withstand the extreme upset flare gas conditions. These devices are fast to respond, with a response time of less than 2 seconds. The response time is dependent on the flow rate. This is unlike the constant power devices that function by measuring the temperature change, thus having limits on measuring low flow rates. It has in-line or insertion probe thermal mass flow meters which can be used to measure large size ducts.

2. Flue gas (or headers) monitoring

The gases that exit from the various processes in a plant through a flue into the atmosphere are known as flue gases. Thermal gas mass flow meter can be used to monitor their emissions rates. Additionally, the different header ducts and pipes that lead to the main exhaust stack can also be monitored to give a warning in case there is an upset in the standard process.

3. Scrubber Balancing

As the name suggests, different types of scrubbers are used to clean (or scrub) the emission gases before they are released into the atmosphere. By using mass flow rate sensors at several points in the scrubber system, the efficiency of the system can be measured and the flow rates of the gases checked.

4. Nitrogen Blanketing

Sometimes, to prevent the content of a large tank from coming in contact with the surrounding air, a layer of nitrogen is used as a blanket. This is known as nitrogen blanketing and thermal mass flowmeters are especially effective in measuring the flow of this nitrogen and keep an eye out for any leaks in the process,thermal flow meter is a perfect choice as nitrogen gas flow meter.

Silver Automation Instruments supply low price cost thermal mass flow meters for flare gas, flue gas and nitrogen gas flow measurement.

  • Flanged Thermal gas mass flow meter with PTFE paintingFlanged Thermal gas mass flow meter with PTFE painting2019/09/13Thermal mass flow meter with PTFE painting is suitable for most gas flow rate measurement, especially suitable for aggressive or caustic gases, such as emission gas,HF gas, ammonia (NH3), H2S, SO2, em...view
  • Thermal mass flow meter for lab gasThermal mass flow meter for lab gas2019/08/08SRK-M Micro-flowrate Thermal gas mass flow meter is designed on the basis of thermal dispersion, and adopts method of constant differential temperature to measuring gas flow. It does not require exter...view
  • Insertion type thermal mass flow sensorInsertion type thermal mass flow sensor2019/06/14Insertion probe thermal mass flow meter is for large pipeline size or ducts gas or air flow measurement, it is easy for users to install or removal from the mounting points without needing cut off the...view
  • Thermal mass flow meterThermal mass flow meter2019/06/14We supply inline or insertion probe thermal dispersion flow meter for gas or air measurement. It is a perfect solution for gas or air measurement from small pipelines to large pipelines, ducts or stac...view
  • Thermal mass flow meter for corrosive gasThermal mass flow meter for corrosive gas2019/07/18Thermal mass flow meter with PTFE painting probe or ceramic probe is suitable for most gas flow rate measurement, especially suitable for aggressive or caustic gases, such as emission gas,HF gas, ammo...view
  • In-line type thermal dispersion flow meterIn-line type thermal dispersion flow meter2019/06/14In-line type thermal mass flow meter provides direct mass or standard volumetric flow measurement for gas or air. In-line thermal mass flow probe is perfect for the pipeline within 4 inch.Features✔ ...view
Chat on WhatsApp
DMCA.com Protection Status