What is Chemical Flow Meter?
A chemical flow meter is a flowmeter used to measure common chemical fluid media. In chemical production control and metering, between chemical reaction storage tanks. As an important monitoring instrument, the flow meter is also used as an instrument for internal cost accounting and foreign trade measurement.
You may often hear about ultrasonic flow meters, electromagnetic flow meters, turbine flow meters, volumetric flow, or mass flow. Chemical flow meters are common in industries like petrochemical plants and refineries. Sino-Inst offers a wide range of liquid and gas flow meters to help you regulate the flow of water, petroleum products, fuels, chemicals, and more.
So how do choose the most suitable Chemical Flow Meter? Hope you can find the answer after reading this article.
Difficulties in the Measurement of Chemical Liquids/Gases
If you want to choose a suitable chemical flow meter, you must first understand the characteristics of the chemical raw materials you need to measure.
According to different forms, chemical raw materials can be divided into solid chemical raw materials, liquid chemical raw materials, and gas chemical raw materials. There are many liquid and gas chemical raw materials, and most of them are corrosive. Special attention should be paid to them during transportation and storage.
The chemical flow meter mainly measures gas and liquid chemical raw materials.
Common characteristics of chemical fluids that need to be considered when measuring flow rate:
- Corrosive
This is the most common characteristic of chemical materials. Corrosive acid, alkali, salt solution.
- Flammable and explosive
Compared with flammable liquids and solids, flammable gas is easier to burn, and the burning speed is fast, and it burns out. Gas composed of simple components is more flammable, the faster-burning rate has higher flame temperature and greater risk of fire and explosion than gas composed of complex components.
- Electrified
Most flammable liquids are electrolytes. Such as crisps, ketones, gasoline, esters, aromatics, and petroleum products.
These substances are transported, poured, shaken, stirred, and flowed at high speeds in pipelines, storage tanks, tank trucks, and oil tankers.
Because friction is easy to generate static electricity, when the static charge accumulated to a certain extent, static sparks will be generated, which may cause burning and explosion.
- Stickiness
Such fluids include glue, resin, asphalt, and molasses.
Gear Flow Meter-the best choice for chemical liquids
The circular gear transmitter produced by Sino-Inst has high machining accuracy and precise installation. The rotation of the gear is scanned by non-contact. Each tooth produces a pulse. The resolution is very high. The cylindrical gear transmitter can measure very small flow. Quantitative small volume of liquid.
The new Gear Flow Meter made of PTFE is widely used in the chemical industry and laboratories. 98% nitric acid and sulfuric acid resistant to hydrofluoric acid. It has not been corroded after long-term continuous use.
- Gear Flow Meter is suitable for:
- Resin and glue measurement
- Hydraulic oil, lubricating oil, grease measurement
- Fuel oil measurement
- Ink, asphalt measurement
- Liquid nitrogen, freezing liquid, solvent measurement
- Edible oil, fish oil and food filling measurement
- Chemical and anti-corrosion requirements fluid measurement
- Fluid quantitative control system
Chemical flow meters types
The following will explain the flowmeters commonly used in the chemical industry.
- Electromagnetic flowmeter. When a conductive fluid flows through an electromagnetic field, the velocity of the fluid can be obtained by measuring the voltage. The electromagnetic flowmeter has no moving parts and is not affected by the fluid. The accuracy of measuring conductive liquids when the tube is full is very high. The electromagnetic flowmeter can be used to measure the flow rate of the slurry fluid.
- DP flowmeter can be used to measure the flow rate of most liquids, gases and steam. Positive displacement flow meter (PD). The PD flowmeter is used to measure the volumetric flow rate of liquid or gas. It introduces the fluid into the measuring space and counts the number of rotations. Impellers, gears, pistons or orifices are used to divert fluids.
- Vortex flowmeter. The vortex flowmeter is to place a non-streamlined vortex generator in the fluid, and the speed of the vortex is proportional to the speed of the fluid to calculate the volume flow. The vortex flowmeter is suitable for measuring liquid, gas or steam. It has no moving parts and no fouling problem. The vortex flowmeter generates noise and requires the fluid to have a higher flow rate to generate the vortex.
- Thermal mass flow meter. The fluid velocity is measured by measuring the increase in the temperature of the fluid or the decrease in the thermal sensor.
- Coriolis flowmeter. This kind of flowmeter uses a vibrating fluid tube to produce a deflection corresponding to the mass flow rate for measurement.
- Turbine flowmeter. When the fluid flows through the turbine flowmeter, the fluid causes the rotor to rotate. The rotation speed of the rotor is related to the speed of the fluid. From the average flow rate of the fluid felt by the rotor, the flow rate or total amount is derived.
- Ultrasonic flowmeter. The propagation time method and the Doppler effect method are methods often used in ultrasonic flowmeters to measure the average velocity of the fluid. Like other speed meters, it is a meter that measures volume flow.
An electromagnetic flowmeter is a kind of chemical flowmeter commonly used to measure corrosive liquids.
In addition to the electromagnetic flowmeter can measure the flow of general conductive liquids. It can also measure the volume flow of liquid-solid two-phase flow, high-viscosity liquids, and strong acids, strong bases, and salt liquid media.
Electromagnetic flowmeter commonly used electrode materials include acid-resistant steel, molybdenum-containing acid-resistant steel, Hastelloy, titanium, tantalum, platinum, platinum-iridium alloy, and so on.
Acid-resistant steel and molybdenum-containing acid-resistant steel are mainly used for domestic and industrial water, raw water, sewage, wastewater, and weakly corrosive acid and alkali solutions such as dilute acid and dilute alkali. The price is low.
Hastelloy is suitable for low-concentration hydrochloric acid and other non-oxidizing acids and non-oxidizing hydrochloric acid, but not suitable for oxidizing acids such as nitric acid.
The corrosion resistance of titanium is slightly better than that of acid-resistant steel, and it has excellent corrosion resistance to chlorides, hypochlorites, and seawater. It has corrosion resistance to oxidizing acids such as nitric acid at room temperature but is not applicable to reducing acids such as hydrochloric acid and sulfuric acid.
Tantalum has superior corrosion resistance similar to glass. Except for a small amount of acid such as fuming sulfuric acid, it is suitable for most acid liquids, but not for alkali liquids such as sodium hydroxide.
Platinum and platinum-iridium alloys have corrosion resistance to almost all acids and alkalis. Aqua regia, ammonium salts, and a few liquids are not applicable. The disadvantage is that they are expensive.
Common lining materials for electromagnetic flowmeters include neoprene, polyurethane rubber, polytetrafluoroethylene, hexafluoropropylene, polyethylene, and so on.
Among them, the good corrosion resistance is polytetrafluoroethylene, which is resistant to the corrosiveness of hydrochloric acid, sulfuric acid, aqua regia, and concentrated alkali solutions; chloroprene rubber is suitable for the corrosiveness of low-concentration acid and alkali solutions such as tap water and industrial water.
Polyurethane rubber has good wear resistance and poor acid and alkali resistance. It is suitable for pulp, mineral pulp, and other slurries.
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Usually, a throttling type differential pressure flowmeter is used, and the pipe diaphragm is lined with corrosion-resistant materials. The diaphragm early used corrosion-resistant stainless steel containing molybdenum. Later, a layer of PTFE isolation diaphragm was added to the diaphragm, but it was still easy to be corroded.
Our company continued to improve the diaphragm material and still did not solve the fundamental problem, and later switched to the solution of isolating ordinary instruments from corrosive media with isolating liquid. But the isolation liquid fluorine oil used is very expensive, which greatly increases the production cost of the instrument.
Of course, in addition to electromagnetic flowmeters. To measure acidic media, oval gear flowmeters, vortex flowmeters, and turbine flow sensors made of acid-resistant materials can also be used. The parts in contact with the medium are made of acid-resistant materials, which can resist general acidic substances.
Such fluids include solvents, solutions, ethanol, diesel, and clean water.
Turbine flow meters are less expensive and usually have chemical flow sensors that have a compact design.
These flow meters are volumetric, meaning that they can measure liquids passing through them either indirectly or directly.
Some of the advantages of using turbine flow meters are that they have high accuracy, can measure high pressure, and have a large measuring range.
The gear flow meter is a common positive displacement flow meter. The gear flow sensor has built-in double gears to operate. The volume of the medium is calculated by the volume of the gear. The flow rate of the small fluid medium is measured.
- It can measure fluids with a viscosity of up to 10000 Pa.s.
- The lowest flow rate can be measured 0.6L/H. That is 0.0026 GPM.
Gear flow meters can be used for resin and glue flow measurement. Flow measurement of hydraulic oil, lubricating oil, and grease. Maltose, syrup. Fuel oil flow measurement. Flow measurement of ink and asphalt. Flow measurement of liquid nitrogen, freezing liquid, and solvent. Edible oil, fish oil, and food filling measurement. Chemical and anti-corrosion requirements fluid measurement. A fluid quantitative control system, etc.
High-viscosity liquid means that the liquid is viscous and thick, which is different from general liquids and non-Newtonian fluids (mud, pulp). The activity is slow and it is very difficult to filter by simple methods.
What’s more, in addition to some dust, the liquid also contains colloidal particles that are not completely dissolved.
For example solutions such as rubber, paraffin, cellulose acetate, viscose, polyacrylonitrile, paint, and animal glue.
The gear flow meter can measure fluids with a viscosity of up to 10000 Pa.s. The lowest flow rate can be measured at 0.6L/H. That is 0.0026 GPM.
The oval gear flowmeter is particularly suitable for measuring high viscosity media. And it is not sensitive to changes in the viscosity of the liquid being measured.
The measurement of the oval gear flowmeter has nothing to do with the flow state of the fluid. The higher the viscosity of the medium, the smaller the leakage from the gear and the metering gap. Therefore, the greater the viscosity of the measured medium, the smaller the leakage error, which is more beneficial to the measurement.
Measurable medium:
Fuel, diesel, gasoline, heat transfer oil, hydraulic oil, kerosene, tar, petroleum, crude oil, asphalt, resin, and other liquids. Especially suitable for the measurement of high viscosity liquids.
Read more about Industrial Oil Flow Meters
When the clamp-on ultrasonic flowmeter is working, the liquid does not directly contact the flowmeter. So it is suitable for various corrosive liquids. But its accuracy rate is relatively low.
Extended reading: Sludge flow meter for sewage treatment return activated sludge system
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In chemical production control and measurement. The flow meter serves as an important monitoring instrument. It also plays an increasingly important role as an instrument for internal cost accounting and foreign trade measurement. All kinds of flow meters have their advantages and disadvantages, in the selection and application of flow meters. It should be considered from various factors such as installation, cost, and maintenance. Choose a cost-effective flow meter suitable for working conditions. Accurate measurement of flow rate is conducive to ensuring the stability of production. It also provides a powerful technical means for enterprises to strive for greater benefits.
Sino-Inst, Manufacuturer for Chemical Flow Meters.
Sino-Inst’s Chemical Flow Meters, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.
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Chemical flow meters|Chemical resistant for Liquids and Gas
A chemical flow meter is a flowmeter used to measure common chemical fluid media. In chemical production control and metering, between chemical reaction storage tanks. As an important monitoring instrument, the flow meter is also used as an instrument for internal cost accounting and foreign trade measurement.You may often hear about ultrasonic flow meters, electromagnetic flow meters, turbine flow meters, volumetric flow, or mass flow. Chemical flow meters are common in industries like petrochemical plants and refineries. Sino-Inst offers a wide range of liquid and gas flow meters to help you regulate the flow of water, petroleum products, fuels, chemicals, and more.
Product SKU: Chemical flow meters
Product Brand: Sino-Inst
Product Currency: USD
Product Price: 200
Price Valid Until: 2099-09-09
Product In-Stock: InStock
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