COATER OF LOOSE MATERIALS (VERSIONS) Russian patent published in 2005 - IPC

FIELD: chemical industry; chemical-pharmaceutical industry; devices of coating of loose materials.

SUBSTANCE: the invention is pertaining to the devices for coating of different loose materials and may be used in chemical industry and chemical-pharmaceutical industry for protective coating of fragments of a loose material, for example, for encapsulation of granules of sodium percarbonate used as a bleaching component in a composition of cleansers for prevention of a contact of the active substance of sodium percarbonate with other components of the cleanser and increasing of the active substance storage duration. The coater contains a work chamber, injectors for feeding of liquid components, a dosing device of the loose material, branch pipes of feeding-withdrawal of the heat transfer agent and withdrawal of the end product. The body of the work chamber is made sectional and consists of a spring-loaded box with a gas-distributing grate and a retractable hood covering the box and not touching its walls. The work chamber has two work sections: a section of deposition of the liquid component and a drying section separated by a non-blind vertical septum and a butterfly gate. The vertical septum is mounted above the gas-distribution grate with a backlash, and the butterfly gate - under a gas-distribution grate. The shaft of rotation of the butterfly gate is located opposite to the septum. The gas-distribution grate is mounted with a capability of variation of an inclination angle. In the second version the body of the work chamber is made non-detachable, and the gas-distribution grate with a vibrator is independently fixed on the remote spring suspensions and is supplied with compactors. The invention ensures production of the uniform coating on each particle and the continuous withdrawal of the ready particles from the zone of heating at an equal residence time in it of each particle.

EFFECT: the invention ensures production of the uniform coating on each particle and the continuous withdrawal of the ready particles from the zone of heating at an equal residence time in it of each particle.