Rotating drying machine

Bundle rotary drier is in long concentric circles, such as within a rotating cylinder capacitor is arranged from 1 to 5, heating tube. Heating for heat transfer between the column tube drying, the drying equipment is called heat transfer heating drying machine, also known as steam tube dryer, it is representative of indirect heating way rotary drier.


The application of rotary dryer

Since 1950, with the development of petrochemical industry, the beginning of drying machine is used for processing large quantities of terephthalic acid, polyvinyl chloride, polystyrene, polypropylene and other polymer dry. (coal slime dryer) are now widely used in general chemistry, including metallurgy, ceramics industry, aquaculture, pulp, non-metallic and other departments. In addition, using starch factory spontaneous electric excess steam as heat source, the by-products drying. Also, the use of steam drying sludge excess, general plant waste heat as heat source of drying machine, such as garbage and sludge generated in brewery discharge fluid handling equipment to dry.

The application of rotary dryer
Since 1950, with the development of petrochemical industry, the beginning of drying machine is used for processing large quantities of terephthalic acid, polyvinyl chloride, polystyrene, polypropylene and other polymer dry. (coal slime dryer) are now widely used in general chemistry, including metallurgy, ceramics industry, aquaculture, pulp, non-metallic and other departments. In addition, using starch factory spontaneous electric excess steam as heat source, the by-products drying. Also, the use of steam drying sludge excess, general plant waste heat as heat source of drying machine, such as garbage and sludge generated in brewery discharge fluid handling equipment to dry.

With the characteristics of the steam tube rotating dryer
(1) the unit volume capacity

Drying machine for internal heating segment, due to the direct contact with the mixing process, heat transfer coefficient is big, and the heat transfer area is big. Unit volume heat transfer directly heating mode with general rotary drier than about 3 times larger.

A large number of sequential processing when the moisture content of material, the volume heat transfer coefficient value is about 60-130 kcal/m3. H. ℃. Need to design and manufacture large capacity dryer, 3.6 4.2 m in diameter, 20-36 m long, the heat transfer area of 4000 m2. The ability to process analysis in drying machine, for example, when the capacity is 250-600 t/h, need heat 15-30 x10 (6) kcal/h.

(2) dry high thermal efficiency

Dry do not need to use plenty of waste heat air, along with exhaust gas heat loss is negligible. Including body surface heat dissipation heat loss, and the overall efficiency of 80% to 90%, indicating that there is a very high heat transfer efficiency. Even compared with direct heating thermal efficiency of rotary dryer, the drying machine has high efficiency, so to speak. Especially the operating temperatures below 150 degrees, thermal efficiency is higher.

(3) under a certain temperature, dry

For indirect heating mode, the temperature of the heating tube is set according to the steam pressure, under a certain temperature heating products, even if the capacity and the change of moisture content, the condensation of steam quantity may also corresponding increase or decrease. Therefore, can be dry under a certain temperature. On this basis, the drying machine is suitable for drying thermal sensitive material, the temperature of the general products should be 15 to 50 ℃ lower than the steam temperature

(4) drying time

Through adjusting, drier inside can be the most appropriate time, usually preferable volume ratio is 10% - 30%, the retention time for 30 to 60 min. This adjustment can be arbitrarily according to stay within the speed change, stay this drying machine is suitable for long time operation system.

(5) in the drying process in the exhaust less dust

Because can exhaust under high humidity 80% - 95%, less displacement, inside the drum wind speed is small, less dust, gas-solid separation, less equipment investment.

(6) system under the condition of airtight dry

For special design of the project, the system can be operation in confined conditions. Drying function recovery and evaporation of the liquid (solvent); When the need necessary conditions for the closed system; With nitrogen gas to prevent the oxidation of the products;

(7) dry easy operation

When the drying temperature change hours, even capacity and moisture content