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Low temperature double cone rotary vacuum dryer

Short Description:

The double cone rotary vacuum dryer is a drying equipment integrating mixing and vacuum drying. The process of vacuum drying is to put the material to be dried in a sealed cylinder, and use the vacuum system to draw a vacuum while heating the material to be dried continuously, so that the water inside the material diffuses to the surface through the pressure difference or the concentration difference, and the water molecules (or other Non-condensable gas) obtains sufficient kinetic energy on the surface of the material, diffuses into the low-pressure space of the vacuum chamber after overcoming the mutual attraction between molecules, and is pumped away by the vacuum pump to complete the separation from the solid.


Product Detail

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Description

The double cone rotary vacuum dryer is a drying equipment integrating mixing and vacuum drying. The process of vacuum drying is to put the material to be dried in a sealed cylinder, and use the vacuum system to draw a vacuum while heating the material to be dried continuously, so that the water inside the material diffuses to the surface through the pressure difference or the concentration difference, and the water molecules (or other Non-condensable gas) obtains sufficient kinetic energy on the surface of the material, diffuses into the low-pressure space of the vacuum chamber after overcoming the mutual attraction between molecules, and is pumped away by the vacuum pump to complete the separation from the solid.

SZG double-cone vacuum dryer is a new generation of drying device developed by our factory in combination with the technology of similar domestic products. The double-cone vacuum adopts two elastic connection methods of belt and chain, so the equipment runs smoothly. The specially designed process fully reflects the good concentricity of the two shafts. The heat medium and vacuum system adopt reliable mechanical seals or American technology rotary joints. On this basis, we developed SZG-A which can not only stepless speed regulation, but also constant temperature control.

As a professional drying equipment manufacturer, our products are available from high-temperature heat transfer oil as the heat medium, medium-temperature steam and low-temperature hot water.

Double cone rotary vacuum dryer01

The double cone rotary vacuum dryer has the following characteristics:
(1) During the vacuum drying process, the pressure in the cylinder is always lower than the atmospheric pressure, the number of gas molecules is small, the density is low, and the oxygen content is low. Therefore, it can dry easily oxidized drugs and reduce the chance of material contamination.
(2) Because the temperature of moisture is proportional to the vapor pressure during the vaporization process, the moisture in the material can be vaporized at low temperature during vacuum drying to achieve low-temperature drying, which is especially suitable for the production of heat-sensitive materials.
(3) Vacuum drying can eliminate the surface hardening phenomenon that is easily caused by normal pressure hot air drying. This is because the pressure difference between the inside and the surface of the vacuum drying material is large. Under the pressure gradient, the water will quickly move to the surface, and the surface will not appear. hardening.
(4) Due to the small temperature gradient between the inside and outside of the material during vacuum drying, the moisture can move and collect independently due to reverse osmosis, which effectively overcomes the loss of hot air drying.

The top angle of the double cone rotary vacuum dryer is 90°~60° (depending on the angle of rest of the material), and the filling rate of the material is 30%~50%. The equipment speed is generally determined by N≤42.3D½r/min (D is the maximum turning diameter). The heat transfer coefficient U of the jacket has nothing to do with the operating pressure. For non-bonding materials, U=116~140W/(m²·K), and for cohesive materials U=80~93W/(m²·K). The heat transfer area is calculated based on the area of ​​the material contacting the cylinder wall. The cylinder of the dryer is designed according to the pressure vessel, the inner cylinder is subjected to external pressure, and the outer cylinder is subjected to internal pressure [1].

Technical parameters

Model SZG-0.1 SZG-0.2 SZG-0.3 SZG-0.5 SZG-0.8 SZG-1 SZG-1.5 SZG-2 SZG-2.5 SZG-3 SZG-4.0 SZG-4.5 SZG-5.0
Volume(L) 100L 200L 300L 500L 800L WOOL 1500L 2000L 2500L 3000L 4000L 4500L 5000L
D Φ800 Φ900 Φ1000 Φ1100 Φ1200 Φ1250 Φ1350 Φ1500 Φ1600 Φ1800 Φ1900 Φ1950 Φ2000
H 1640 1890 2000 2360 2500 2500 2600 2700 2850 3200 3850 3910 4225
H1 1080 1160 1320 1400 1500 1700 1762 1780 1810 2100 2350 2420 2510
H2 785 930 1126 1280 1543 1700 1750 1800 1870 2590 2430 2510 2580
L 1595 1790 2100 2390 2390 2600 3480 3600 3700 3800 4350 4450 4600
M 640 700 800 1000 1000 1150 1200 1200 1200 1500 2200 2350 2500
Materil feed weight 0.4-0.6
Max material feed weight 50 80 120 200 300 400 600 800 1000 1200 1600 1800 2000
Interface Vacuum Dg50 Dg50 Dg50 Dg50 Dg50 Dg50 Dg50 Dg70 Dg70 Dg100 Dg100 Dg100 Dg100
Condensedwater G3/4" G3/4" G3/4 G3/4' G3/4" G1" G1" G1" G1" G1" G1/2" G1/2" G1/2"
Motor Power 1.1 1.5 1.5 2.2 2.2 3 4 5.5 5.5 7.5 11 11 15
Total weight 650 900 1200 1450 1700 2800 3300 3580 4250 5500 6800 7900 8800

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