What Is a Solid Flow Meter?

The solid flow meter is suitable for the measurement of solid mass flow in a wide range of metal-enclosed pipelines from kg/h to t/h. The system is suitable for online monitoring of the flow of solids such as powder, dust, pellets, granules, etc., which are pneumatically conveyed or in free fall (1nm-20mm). Solid flow meters are also called solid powder flow meters, intelligent electrostatic powder flow meters, solid dust flow meters, coal powder flow meters, mineral powder flow meters, lime flow meters, cement flow meters, flour flow meters, petroleum coke powder flow meters.

Solid Flow Meter

Sino-Inst supplies GTL/C powder flow meter. The intelligent electrostatic powder flow meter continuously measures bulk solid materials in a process. The ring sensor is used. It is suitable for the measurement of solid mass flow in a wide range of metal-enclosed pipelines from kgh to th. The system is suitable for online monitoring of solid flow such as powder and dust conveyed by pipeline pneumatic conveying. Also known as pipeline solid flowmeter, solid powder flowmeter, intelligent electrostatic powder flowmeter, solid dust flowmeter, microwave solid flowmeter, etc. Applicable to: coal powder, mineral powder, lime, cement, flour, petroleum coke powder, etc.

Solid Flow Meter Parameters

Pipeline gas pressure-0.1Mpa~2 Mpa
Pipeline gas flow rate1m/s~30 m/s
Pipeline gas temperature-50℃~260℃ (450℃ high temperature customized)
Outer diameter of pipe10mm~600mm
(Standard 5, 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, etc., special specifications can be customized)
Accuracy class±5% of full scale
Measuring range0-20/100/500/2000Kg/h (10kg measuring range customized)
Dust size0.1uM~200 uM
Sensor structureUnobstructed pipeline
Operating environment electromagnetic fieldHigh value at 50 Hz = 60A/m
Operating environment humidityNo condensation 90%
temperaturePTFE lining: -20+120℃
High temperature type PTFE lining -20-+260℃C
Operating environment vibrationHigh continuous oscillation, any direction, any frequency: root mean square value 2g (20m/s2)
Operational environmental protectionProtection grade: IP66/NEMA4 aluminum alloy shell
Transmitter power supply24V (available in the range of 15V~32V)
Transmitter output4~20mA isolated output
Response time1 second
Power consumptionBig 3W
Zero driftLess than 1%
Full scale driftLess than 1%

Extended reading: Radar level sensor for solids – Dust solid level measurement

Solid Flow Meter Working Principle

The Solid Flow Meter is based on the theory of contact electrification of solid materials.

The powder will accumulate a certain degree of electric charge during the pneumatic conveying process. This phenomenon is caused by the continuous collision, friction, and separation process between the powder particles and the particles, and between the particles and the tube wall.

The sensor part of the Solid Flow Meter is composed of a short stainless steel tube, a ring electrode, and an insulating layer. The two ends of the short tube are connected to the pipeline through a flange. The grounded metal tube wall plays an electromagnetic shielding role.

When the charged particles pass through the measuring pipe section, based on electrostatic induction, the sensor senses the charge number of the charged particles. The front-end circuit is connected to the sensor and the signal is amplified. Then it is calculated and processed by a converter with a high-speed central processing unit core. The flow rate is calculated and processed. The signal is converted into a standard current signal linearly related to the powder flow rate. It is used for flow control and adjustment.

Extended reading: Stainless steel flow meters|304-316 optional

Solid Flow Meter Features

  1. Suitable for the conveying process of pneumatic conveying device;
  2. Intelligent design, can measure almost all solid materials;
  3. Integrated design, sensor, transmitter and display are integrated;
  4. No throttling parts, no pressure loss during measurement;
  5. Non-contact measurement, not affected by temperature, pressure, and vibration.

Solid Flow Meter Advantages

  1. Advanced toroidal charge sensor has the advantages of fast response, high sensitivity and accurate measurement;
  2. The measurement speed is very fast and the static repeatability is good;
  3. Static particles such as sediments have no effect on the work of the product;
  4. The stainless steel shell is firm and durable, and the PTFE lining is resistant to high temperature and pressure;
  5. Easy installation and maintenance-free.

Solid Flow Meter Application

  1. Power plant boiler coal injection, pulverized coal quality, concentration, flow measurement;
  2. Activated carbon flow detection of waste incineration power generation in power plants;
  3. Limestone powder flow measurement during pneumatic conveying;
  4. Sodium phosphate flow monitoring;
  5. Blast furnace coal injection flow detection.

Application industry:
Chemical, chemical fiber, glass manufacturing plants, food, papermaking, mining and metallurgy, environmental protection, steel, power stations, petroleum, cement manufacturing, and other industrial fields.
It is used to measure the volumetric flow of various small particles such as coal powder, mineral powder, lime, cement, flour, petroleum coke powder. etc.

Read More about Chemical Flow Meter Guide

How Do You Measure the Flow of Solids?

The Solid Flow Meter is based on the theory of contact electrification of solid materials. The powder material will accumulate a certain degree of electric charge during the process of pneumatic conveying or free fall.

How Do You Measure the Flow of Solids

Solid Flow Meter uses today’s advanced ring sensor. It can effectively capture every charged powder particle signal that passes through the ring sensor. It is amplified, shaped, and filtered by an amplifier circuit, and then processed by a high-speed processor. The final output is linear with the powder flow The standard current signal of the relationship.

The GTL/C powder flow meter is suitable for the measurement of solid mass flow in metal-enclosed pipelines with a wide range from kg/h to t/h. The system is suitable for online monitoring of the flow of solids such as powder and dust conveyed by pneumatic conveying. It can be widely used in electric power, metallurgy, cement, pharmaceutical, chemical, food manufacturing, and other industries.

Solid Flow Meter Selection Guide

When looking for a solid flow meter suitable for your process, Sino-Inst recommends that you make the best choice based on the following conditions:

  • Maximum flow
  • Material particle size
  • Material temperature
  • Bulk density/bulk density

After finding a solid flow meter suitable for your process according to the application conditions and material characteristics, you should also consider the following influencing factors:

  • Wear: Wear will affect the life of the measuring piece. It is worth noting that changes in material flow will also cause significant wear.
  • Adhesion: Materials should not adhere or accumulate on the surface of the measuring piece, as this will cause calibration deviations due to the buffering effect of adhered or accumulated materials.
  • Corrosive: Corrosive materials will damage the flowmeter components. Corrosive gases are also worth noting.
  • Airflow: Unstable and unpredictable airflow will affect the accuracy of airflow.
  • Unsteady material flow: For uneven material flow, please choose a displacement sensor type solid flowmeter. Because the displacement sensor type solid flowmeter has the characteristics of mechanical hydraulic buffering.

Selection of the capacity of solid flowmeter draft tube:

Selection of the capacity of solid flowmeter draft tube
Sino-Inst prompts you to select the diameter of the draft tube. Regardless of any angle, the material must not exceed 1/2 the filling height of the draft tube.

Extended reading: GWR Solid Level Sensor-for Cement silo-Ash powder measure

Impact Plate Solid Flow Meter

Impact Plate Solid Flow Meter is used for metering equipment for powdery and granular materials with strong fluidity. Mainly suitable for closed material flow. Installation is restricted. Other occasions where similar products cannot be adapted. It is widely used in building materials, cement, chemical industry, coal, mining, ceramics, glass, metallurgy, grain, fertilizer, feed, port, electric power, coking, environmental protection and other industries.

Impact Plate Solid Flow Meter
  1. All-steel frame structure, with sufficient rigidity and strength.
  2. The special measuring chute is used to ensure wear resistance, non-sticking of materials, and measurement accuracy
  3. Adopting high-precision digital weighing module, digital transmission technology, with simple circuit, no adjustment and section parts, high resolution, no signal attenuation, and strong anti-interference.
  4. The controller adopts touch display technology, Chinese and English graphical display, guided operation mode, simple operation, no need to remember.
  5. It can be connected to 485 communication, CAN communication, DCS, PLC and other interfaces.
  6. GPRS wireless data transmission function is adopted, which can provide functions such as short message report, remote diagnosis, and scale calibration.

  1. Measuring accuracy: ≤±1%
  2. Feeding capacity: 2-1000T/H
  3. Power supply: 220V/AC±15%, 50Hz±2%
  4. Use environment:
    Scale body: –45~60℃
    Control cabinet: 0℃~45℃
  5. Relative humidity: ≤90%

How Impact Plate Solid Flow Meter works

The solid flow meter sends the measured material flow signal to the microprocessor control system. Automatically calculate the instantaneous flow of materials and the cumulative output of materials. The microprocessor controller constantly compares the actual flow with the set flow. And control the position or speed of the pre-feeding device. So as to change the feed-forward quantity of the material. In order to achieve the purpose of constant feeding.

The function of the calibration chamber is to perform irregular calibration on the feeding part. The feeding part is constantly corrected for errors. To ensure the accuracy of feeding.

Microwave Solid Flowmeter-Gas Powder Explosion-Proof

The microwave solid flow meter uses the latest microwave technology. It is suitable for the measurement of solids in metal pipes.
Online flow measurement. All powder, dust, crumbs, and particulate matter can be measured repeatedly. The measurement range is as small as kilograms per hour and as large as tons per hour.
A microwave solid flowmeter is suitable for online measurement during pneumatic conveying or free fall. Therefore, it is an alternative product of a cost-effective weighing system.
MONITOR level monitor and display can be used on various occasions to detect the flow/non-flow state of powder and solid particles. Choose SFD-2 solid level monitor or SFI solid level display. Mainly based on the output type (relay or analog Quantity) requirements.

Microwave Solid Flowmeter

The microwave solid flowmeter uses a 24GH high-frequency microwave. Through the coupling of the electromagnetic field between the sensor and the pipeline, a measurement field is generated.
When the detected medium passes through the microwave detection field, the sensor transmits low-power microwaves and receives the energy reflected by the object. There is a frequency difference between the received microwave reflection frequency and the transmission frequency. A low-frequency AC voltage is generated at the output end. That is, the microwave sensor detects the quantity and flow rate of the moving medium.
The microwave energy of the measuring field is reflected by the solid particles and received by the receiver. According to the Doppler principle, only the flowing particles can be measured by the microwave solid flowmeter. The flow rate (mass) can be calculated by combining the number and state of the particles recorded.

  • Non-contact mass flow online measurement
  • Compact structure and no need for armor protection
  • Easy, fast and cost-effective installation and start-up
  • Adjustable sensitivity
  • With RS485-interface can be connected to the system
  • The most advanced microwave technology
  • Robust and durable stainless steel housing
  • Wearable
  • Maintenance-free
  • The following are the main features of the microwave solid flow meter 17-8511-11:
    • Non-plug-in quick installation, no direct contact with the measured medium
    • SFD-2 can provide relay output and convenient electronic remote control
    • SFI solid flow display provides adjustable analog signal
    • Has passed CSA CLASS II, DIVISION I certification for use in hazardous situations

  • Suitable for pneumatic conveying device and free fall conveying process
  • Suitable for all solid materials, ranging from several kg/h to several t/h
  • No need for armor protection inside the tube, internal fittings are flush assembled
  • Non-contact measurement, not affected by temperature, pressure, and vibration
  • Very fast measurement speed, good static repeatability
  • Static particles such as sediments have no effect on this
  • Sensor-transmitter distance up to 2,000 meters
  • Limit alarm monitoring, with alarm contact
  • Highly sensitive type MF3000-S suitable for very small flow
  • MF3000-D suitable for high pressure
  • Suitable for ATEX area type 20 and type 2

  1. Coal injection in iron-making blast furnaces and coal injection in power plant boilers (the instantaneous pulverized coal concentration of the coal injection main pipe and each branch pipeline can be monitored online, and the working status of each tuyere can be judged.
  2. Monitoring of soot emission concentration of various fuel boilers
  3. Widely used in various industrial applications, including: steelmaking, power generation, petroleum, chemical, pharmaceutical, building materials processing, coal mining and mining, cement manufacturing and packaging industries.
  4. It can detect all dusty objects, such as sand, gypsum, wood chips/craft wood chips, cement, coal ye/brown coke powder, flour, calcium carbonate powder, talcum powder, crushed stone, lime powder, limestone powder…

A microwave solid flow meter monitors the blockage of a part of the transportation line or the entire line. Monitors the bridging status of the upstream medium in the storage tank. Monitors the inappropriate or inadequate flow of the medium due to the failure of the upstream equipment. Monitors the flow state of the medium. Control Start/stop of equipment. Control downstream processes.

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Sino-Inst offers over 50 flow meter for flow measurement. About 50% of these are differential pressure flow meters, 40% is the liquid flow sensor, and 20% are Ultrasonic Level Transmitter and mass flow meter.

A wide variety of flow meters options are available to you, such as free samples, paid samples.

Sino-Instrument is a globally recognized supplier and manufacturer of flow measurement instrumentation, located in China.

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