Clogging of the nozzles

Use magnetic fillers, along with a magnetic field in tank to help dispersion and reduce clogging of the nozzle... 

The different injection rates explain the possibility of process control. This process would be stable at high conversions at constant nozzle operation. The reason for temporal clogging of the nozzle is the high solid content of the suspension and the coarse suspended calcium hydroxide. A cyclic cleaning of the nozzle has been used in later experiments. 

Water-soluble organic solvents are added in order to increase the solubilities of glycol ether, which has a low solubility in water, and also in other constituents to increase the penetration in the recording media, such as paper, and to prevent the clogging of the nozzles (3). 

Mechanical 3D printing Powder based process through binder infiltration Particle size influences porosity clogging of the nozzle Not possible... 

The inks formulated for jet printing must be very fluid, stable, and free of any particles that could cause clogging of the jet nozzles, and be capable of depositing and adhering to a substrate with a minimum of character fogging. They are generally formulated with soluble dye colorants in a suitable aqueous or solvent-based vehicle (9). 

Equipment Operation Spray nozzles suffer from caking on the outside and clogging on the inside. When the nozzle is below the bed surface, fast capture of the liquid drops by bed particles, as well as scouring of the nozzle by particles, prevents caking. Blockages inside the nozzle are also common, particularly for slurries. The nozzle design shoiild be as simple as possible and provision for in situ cleaning or easy removal is essential. 

On the basis of Fig. 16.46, it is clear that the particle diameters change due to granulation, while the coupled mass and heat transfers from gas to particles does not affect the conversion. As all of these experiments show, the crucial criterion is the suspension stored in the bed. Absorption of the gas component can occur only by the mass transfer surface. As a result of the nozzle clogging, the liquid in the granulator begins immediately to dry, and the drying process entails a decrease in mass transfer surface for absorption and a reduction in the conversion. Thus, an increasing concentration and associated conversion of sulfur dioxide can be explained in the case of nozzle failure. 

The nozzle strainer is placed in the nozzle body to screen out debris which may clog the nozzle opening. The type of nozzle strainer needed depends on the size of the nozzle opening and the type of chemical being sprayed. 

The disadvantage of the Wurster process is the inaccessibility of the nozzles. If the nozzles are clogged at any time during the layering process, the operation... 

Another piece of equipment that has been used to manufacture pellets by solution/suspension layering is the tangential spray or centrifugal granulator. An important parameter that needs to be established early in the process is quantity of starter seeds or cores charged into the machine that should, at the minimum, cover the nozzles during start-up otherwise, the sprayed liquid droplets will either be sprayed onto the wall of the product container or become entrained in the fluidization air. The latter could lead to clogging of the filters, which would then not only increase the pressure differential across the filters and compromise the batch but also may complicate equipment cleanup. In either case, the yield, and probably the quality of the pellets, will be reduced dramatically. As the size of the... 

In aerosols, other than those for inhalation, colloidal silicon dioxide is used to promote particulate suspension, eliminate hard settling, and minimize the clogging of spray nozzles. Colloidal silicon dioxide is also used as a tablet disintegrant and as an adsorbent dispersing agent for liquids in powders. Colloidal silicon dioxide is frequently added to suppository formulations containing lipophilic excipients to increase... 

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