Drying equipment classification and selection

How is the classification of drying equipment? Xiaobian to introduce you to introduce.

Pressing pressure

According to the operating pressure, the dryer is divided into normal pressure dryers and vacuum dryers. Operating under vacuum can reduce the wet partial pressure of steam in the space and accelerate the drying process, and can reduce the boiling point of the moisture and the drying temperature of the materials. Steam is not easy. Leakage, therefore, vacuum dryer is suitable for dry thermal sensitive, easily oxidized, explosive and toxic materials and wet steam recovery occasions.

According to the heating method, the dryer is classified into convection type, conduction type, radiation type, and dielectric type. Dryers of this type do not use drying media and have high thermal efficiency. The product is not contaminated, but the drying capacity is limited by the heat transfer area of ​​the metal walls. The structure is also complex and often operates under vacuum. The radiation dryer uses various types of radiation. The device emits a certain wavelength range of electromagnetic waves, which is selectively absorbed by the surface of the wet material and converted into heat for drying. The dielectric dryer uses high-frequency electric fields to effect the drying of heat inside the wet material.

According to the movement mode of wet materials, the dryer can be divided into fixed bed type, agitation type, spray type and combination type; according to the structure, the dryer can be divided into box type dryer, conveyor type dryer, drum type dryer, and stand Dryers, mechanical stirring dryers, rotary dryers, fluidized bed dryers, air dryers, vibratory dryers, spray dryers, and combination dryers.

Equipment selection?

1. Physical and chemical characteristics of the material - form, moisture content, water content, crystal water, particle size, bulk density, viscosity, heat-sensitive, softening point, phase transition point, thixotropy, toxicity, corrosion, odor, flammability, explosiveness , electrostatic, breathable, agglomerate, crystal or particle susceptibility...

2. Drying characteristics of the material - The drying curve, the critical moisture content, and the equilibrium moisture content under the drying conditions to be selected.

3. Drying production requirements and long-term planning.

4. The impact of material commodity value and drying effect on it. Such as product moisture, pollution, temperature, wear, pulverization, comminution, rehydration ... and other effects on the value of goods.

5. The requirements for the material recovery rate.

6. The sequence of the material drying process. (Involving the state method of giving and placing)

7. Past drying methods for materials or similar products.

8. Available heat sources (coal, fuel oil, electricity, gas, liquefied gas, natural gas)

9. Installation site size, with or without special requirements.

10. Environmental Requirements - Restrictions on dust emission, noise, vibration, odor, volatiles, etc.

11. The amount of procurement funds that may be invested, local labor, land, and energy prices.

12. The user's operator level and maintenance capabilities.

13. Average annual temperature and humidity in the area.

The above is the classification and selection of drying equipment. Customers who need it quickly visit our website to select it.