Transfer Used stainless steel double cone vacuum rotary dryer

Double cone rotary vacuum dryer double cone rotating tank, the tank in a vacuum state, to the jacket into the steam or hot water heating, heat through the tank wall in contact with the wet material, wet material after evaporation heat water vapor, out through vacuum exhaust pipe is pumped. Since the tank body in a vacuum, and the rotation of the tank so that the material inside and outside continue to flip up and down, so to speed up the drying rate of materials, increase drying efficiency, to achieve uniform drying purposes. Double cone rotary vacuum dryer system consists of double cone rotary vacuum dryer, a condenser, dust, vacuum pumping systems, heating systems, cooling systems, electrical control system components. Double cone rotary vacuum dryer is a mixed vacuum drying in one of the drying equipment. Vacuum drying process is dried material will be placed in a sealed cylinder body with a vacuum system vacuum while continuously heating the material to be dried, the material internal moisture diffusion to the surface by the pressure difference or differential concentration of water molecules (or other non-condensable gas) get enough kinetic energy in the material surface, after overcoming the mutual attraction between molecules diffuse into the low-pressure space of the vacuum chamber is vacuum pumped and complete separation of the solids. So, double cone rotary vacuum dryer performance at properties: (1) vacuum drying process, the pressure cylinder body is always lower than the atmospheric pressure, the number of gas molecules, low density, low oxygen, which can readily oxidized and dried drugs, reduce the chance of material contamination. (2) Due to the temperature and moisture vapor pressure is proportional to the vaporization process, so the vacuum drying, the material of the moisture can be vaporized at low temperatures, reaching low-temperature drying, especially for heat-sensitive materials have pharmaceutical production. (3) vacuum drying to eliminate surface hardening atmospheric air drying is easy to produce, it is because a vacuum drying between materials and surface pressure large, under pressure gradient effect, the water quickly toward the surface, the surface does not appear hardened. (4) Since the vacuum drying, the material between the internal and external temperature gradient is small, due to the reverse osmosis enables moisture to move alone and to collect, effectively overcome the phenomenon of separated dried with hot air generated. [1] 2 Spec edit double cone rotary vacuum dryer apex angle of 90 ° ~ 60 ° (angle of repose, as the material may be), the material filling rate of 30% to 50%. Device speed is generally press N≤42.3D? R / min determined (D is the maximum swing diameter). Jacket heat transfer coefficient U and operating pressure independent, non-adhesive materials for U = 116 ~ 140W / (m2 · K), the bonding of materials U = 80 ~ 93W / (m2 · K). The heat transfer area in contact with the cylinder wall material is calculated on the basis of the area. Dryer cylinder by pressure vessel design, the inner cylinder under external pressure, the outer cylinder by internal pressure. [1] 3 Product Selection edit many domestic factories can produce double cone rotary vacuum dryer. More well-known brands Taicang Taicang exhibition day exhibition day enamel enamel drying equipment Drying Equipment Co., located in the scenic Jiangnan Water and has a reputation of the Millennium town Taicang Shaxi Town, Taicang is in the original restructuring industrial enamel factory by section The main engineering and technical personnel and industrial enamel design and manufacture of the backbone of the reorganization and the establishment of a professional manufacturer of glass-lined steel, carbon steel, stainless steel equipment companies. The company is strong in technology, manufacturing technology is mature, advanced equipment conditions, improving detection equipment. A sound quality management system. And adopted the ISO9001-2000 quality system certification, the company's products strictly enforce national standards, Ministry of Chemical Industry standards, industry standards and GMP requirements of the design, production, manufacture, testing. Xu, general manager is fired enamel has more than 30 years of experience, and participate in the country's first full enamel double cone rotary vacuum dryer production. Characteristics of material 1) viscosity materials. The viscosity of the material varies with its moisture, viscosity material can agglomerate into blocks, and cylinder wall adhesion, easy adhesion of the filter and the wall after drying. Pneumatic tapping and can crusher. 2) Material allowable temperature. Allowable temperature is the maximum temperature the material can withstand. Beyond this temperature will result in material changes in potency, decomposition damage or discoloration. Material quality bulk density per unit volume 3) material known as bulk density. As the material is a mixture of absolute dry material and moisture, and is often bone dry granular material, powder or solid bulk materials, and with different materials in moisture lead to bone dry material gap between the particles are different. Original wet material and bulk density of the material in the drying process are very different and should pay attention to when selecting a dryer. When the slip angle 4) materials piled granular or powdered materials, when the ramp between the pile of material and the bottom angle is increased to a certain point, the material will slide down the side of the phenomenon. The angle between the ramp and the underside of the occurrence of material of said slide slip angle of the material. Slip angle and material composition, moisture content, particle size and viscosity related. When choosing double cone dryers, reference material slip angle, select the angle of the cone size. The drying temperature with the physical properties of different materials, choose the appropriate temperature. Typically variable temperature drying method can be used in the initial drying temperature is low, gradually raise the temperature to increase the drying rate. At the beginning of vacuum and heat, slow drying, when the material is heated to a temperature above the vaporization of water, drying speed suddenly accelerated, the material in the allowable temperature range is heated to vaporization temperature for the corresponding pressure and a lot of vaporization, then the material temperature remains constant, the heat of vaporization, and heat loss is made for added heat, vacuum vaporization systems continue to discharge steam, and space to maintain the evaporation surface pressure difference, the drying continues. Moisture content of the material is reduced to a certain extent, the evaporation of moisture from the material out of the reduction in the amount of heat under the same circumstances, the material temperature starts to rise, the evaporation surface and space pressure decreases, dried into a deceleration phase. Drying rate decreased gradually until zero. Working vacuum usually use 103 ~ 10? Pa. High vacuum, the material moisture vaporization temperature is low, fast drying. But the vacuum is too high, resulting in increased pumping system cost, increased material prices after drying, economically viable. Although the rotational speed of the rotational speed of the faster cylinder double cone rotary vacuum dryer, the drying rate is higher. But in the early stages of drying, if a faster speed of rotation, it is easy to make the material bonded into a group phenomenon, and therefore, a lower initial drying speed, until the surface is dry material in increasing the rotation speed of the cylinder. Drying period, with the lower water content of the material, the rotational speed should be appropriately reduced ,, this time to improve the speed of the drying rate of increase than good. Therefore, during the drying process of staff should be ready to control the material according to the situation. [2]