Characteristics of Coal Moisture Meter

Characteristics of Coal Moisture Meter

Using 2.40GHz low-frequency microwave (which can penetrate high-density and wide belts), the attenuation and phase change caused by the transmission of this wave through the measured medium are mainly determined by the dielectric constant and dielectric loss tangent of the medium. Water is a polar molecule, and its dielectric constant and dielectric loss tangent are higher than those of ordinary media. Usually, the dielectric constant and loss tangent of an aqueous medium are mainly determined by its moisture content. Microwaves emit energy from the microwave emitting probe located below the conveyor belt, and after passing through the belt and material, the remaining microwave energy is received by the microwave receiving probe at the upper end of the belt. Based on the attenuation of microwave power and changes in phase shift, as well as the calculation of instantaneous total mass using ultrasonic quality compensation probes, the moisture content of the material is calculated using the percentage content of total energy loss and total mass.

Advantage:

1. Not sensitive to the pH value and conductivity of the tested material.

2. The measurement of total water (the sum of external and internal water of the tested material) is more representative of the test results.

3. Non contact measurement: Will not wear the probe, will not adhere to materials, and will not affect the production process.

4. Provide instantaneous measurement values (real-time testing) for process control.

5. High measurement accuracy, with a uniform material accuracy of 0.1 to 0.01%.

6. Maintenance free and low operating costs.

7. Low emission energy, will not change the properties of the material, safe and reliable.

8. Not affected by environmental factors such as dust and water vapor, with anti-interference abilityStrong power.

9. Not affected by material color changes and sunlight exposure.

10. Measurement method: Microwave penetration.

11. Configuration: Energy emission probe, receiving probe, height (mass) compensation probe, microcomputer central processing system.

12. Rich in functionality, with multiple variable measurements available, such as temperature, mass flow rate, etc

Characteristics of Coal Moisture Meter

Application fields:

• Steel industry: incoming raw materials, yard stacking, batching room (mixing ore, coke powder, coal powder, quicklime, etc.), sintering mixture, blast furnace coke, pellet raw materials, before and after drying, balling, etc.

• Power industry: incoming raw materials, material yard stacking, coal transportation system, coal grinding system, boiler coal powder, slag, ash, limestone, etc.

• Coking industry: incoming coal raw materials, yard stacking, coal transportation system, coal grinding system, drying system, coke oven coal powder, coke, etc

• Coal industry: coal chunks, peat, coal powder, coal, coke, thermal coal, coking coal, trade settlement, etc

• Nonferrous metals: bauxite, copper concentrate, mineral sand, nickel ore, gold silver lead zinc concentrate, alumina, and non-ferrous smelting, etc

• Tobacco industry: cigarette packs, tobacco stems, tobacco leaves, cut tobacco, re drying, tobacco branches, etc

• The grain industry, food processing, ceramic industry, glass industry, cement industry, pharmaceutical industry, chemical industry, wood industry, paper industry, and so on.

Comparison between Coal Principle and Other Principle Moisture Meters:

• Infrared, capacitance, conductivityprincipleThey all have certain limitations. radioactive sourceprincipleIt will bring a lot of maintenance work and potential hazards.

• infraredprincipleCan only measure the humidity on the surface of the material, microwaveprincipleIt can measure the humidity of all materials.

• Small changes in color can significantly affect infrared radiationprincipleThe measurement results, while microwaveprincipleNot affected by color.

• infraredprincipleThe measurement results are affected by the intensity of light, while microwaveprincipleIt will not be affected by the color of the light intensity.

• In harsh industrial environments, infraredprincipleThe accumulation of dust and soil in the measuring lens can affect the measurement, while microwaveprincipleWill not affect the measurement

Blended coke online moisture detection Blast furnace coke online moisture detection

Online moisture detection of incoming materials before mixing and online moisture detection after mixing

Online moisture detection after mixing

Online moisture detection of pellet raw materials