I. Overview of organic pigment drying machine

The organic pigment sputum dryer can be dried including benzimidazolone series, azo condensation (macromolecule) series, isoporphyrin series high performance organic pigments and solvent dyes, and related dyeing and pigment intermediates.

Vacuum kneading dryers are mostly used in the chemical, feed and food industries for the drying of pellets and powders. The utility model relates to a novel horizontal intermittent vacuum drying device. The wet material is evaporated by conduction, and the agitator forms a circulating flow in the dryer, and the water is evaporated and then pumped out by the vacuum pump, thereby achieving the drying effect. However, the vacuum kneading dryer of the prior art is only limited to the drying of specific materials and specific properties during drying, and is suitable for materials which are not resistant to high temperature, easy to oxidize or flammable and explosive, and need to recover solvent and dry during drying. The drying of the dust-contaminating material is not suitable, which brings certain limitations to the drying of the material.

The vacuum kneading dryer can be applied to vacuum kneading dryers of all materials of different conditions and different properties. The vacuum kneading dryer comprises a motor, and the motor is connected with a rotating shaft through a reducer, and a cylindrical body is arranged outside the rotating shaft, a plurality of stirring rods are arranged on the rotating shaft, and a feeding port is arranged above the cylindrical body, and the utility model is characterized in that: the feeding port side is connected There is a dry dust remover, a dry dust remover is connected with a wet dust remover, a wet dust remover is connected with a condenser, a condenser is connected with a condensate receiving tank, a condensate is connected with a vacuum pump by a tank, and a vacuum pump is connected with the steam separator. The equipment has strong applicability, wide application range, good product quality, convenient operation, low labor intensity and good operating environment.

The vacuum kneading dryer adds the material to be dried into the cylinder through the feeding port, and the motor drives the speed reducer to drive the rotating shaft to rotate. Under the stirring of the stirring rod of the positive and negative rotating, the material axially moves back and forth, and the material and the inner wall of the cylinder The contact surface is continuously updated, indirectly heated by steam, and the stirring rod is evenly stirred to make the surface moisture of the material more favorable to be discharged. The solvent such as vaporized moisture passes through the dry dust remover, the wet dust remover and the condenser to enter the condensate receiving tank. It is pumped out by a vacuum pump and sent to a steam separator to further separate the solvent such as gas and water. The solvent such as condensed water is discharged or treated by the condensate from the solvent discharge port at the lower portion of the tank. A heat carrier such as steam enters the jacket of the cylinder through the inlet of the heat carrier, and is discharged from the outlet of the heat carrier for recycling. Due to the high degree of operating vacuum, the water vapor pressure on the surface of the dried material is much larger than the water vapor pressure in the evaporation space in the dryer casing, which facilitates the discharge of moisture and surface moisture inside the dried material, and is beneficial to the movement of water molecules in the dried material. To achieve the purpose of drying.