Spray drying tower nozzle failure and treatment methods
Spray drying tower in the production process will occur nozzle speed is too low, evaporation is too low, there are noises or vibrations phenomenon centrifugal nozzle operation, how to deal with it?
Nozzle speed is too low, evaporation is too low, mainly centrifugal applicator unit out of trouble, so to stop using the nozzle check nozzle internal parts. The reason may be: to reduce the amount of air the whole system; low inlet temperature of hot air; equipment leakage phenomenon, there is cold air into the drying chamber. Remedy for: Check the speed of the centrifuge is normal; check valve spray drying equipment centrifuge position is correct; check the air filter and air heater duct is clogged; check the grid voltage is normal; check the heater is working properly; check the spray drying apparatus is connected to the various components of the seal.
There are noises or vibrations when running centrifugal nozzle, spray drying equipment is mainly due to the nozzle caused by improper cleaning and maintenance spray disc is enclosed residual material or spindle bending and deformation, it could be bad centrifugal disk balancing. Solution: check whether there is residual spray plate material, if it should be cleaned; found abnormal spindle, should be replaced on the centrifugal disc re-balancing adjustment or replacement.
In order to meet market needs, improve product solubility, brewing and packaging performance. Some spray drying equipment increased granulation equipment, but it will increase the thermal denaturation loss products and aromatic substances, and MD-type spray dryer can effectively solve the integration problem drying tower, the separation chamber and the cooling chamber. In spray-dried falling rate drying period, with the decrease of water, the temperature rise of the powder. In dairy products, for example, the lower portion of the drying tower for drying air temperature of 90 ~ 100 ℃, the temperature of the powder is about 60 ℃, in order to prevent thermal denaturation, hope is rapidly cooled when dry end. This LPG type spray dryer installed in the lower portion of the drying column flow of the cooling chamber, this system has the cyclone fine powder, fed to the lower portion of the flow of the cooling chamber by air separation chamber, the separation chamber and being separated together with the gravity powder was cooled to about 30 ℃, then discharged, as a result of the thermal denaturation has very good control.