Flash dryer operation steps

Flash dryer consists of dry hot air tangentially into the bottom, driven by strong wind in the rotation of the agitator. Material from the spiral feeder into the dryer, strong function under the high-speed rotation of the impeller, the impact of the material, friction, and dispersed under the action of the shear force of the block material quickly crushed, and good contact with the hot air, heat, drying. Dry material to the dust collection system for collection, in line with the requirements of environmental protection dust content of 50 mg / m3 of exhaust air through the induced draft fan exhaust, complete the entire drying process. The following is to say a few words about the normative operation of the flash dryer.

First, the flash dryer startup procedures dial flexible, normal transmission equipment, all kinds of work in place, safe and proper heating before starting.

1, the first start the induced draft fan, and then start the blower, open the butterfly valve scale, to ensure that the gas flow. The induced draft fan adjusts the valve opening, the dryer operates under micro-negative pressure.

2, start the flash dryer air compressor, control multi-channel operating conditions of compressed air pressure in the design process, open the bearing under the tower cooling water pipe.

3, open the bag pulse blowback system controller, and adjust the frequency to ensure that the gas inlet pressure in 0.5 - 0.6 Mpa work.

4, wet material before, must first determine the moisture content > < Input feed hopper, start the mixer, mixing materials.

5, open the flash dryer gas valve into the gas ignition temperature and air inlet temperature of the dryer gradually rises, the air outlet temperature exceeds 110 ℃ dryer, start the motor, into the knife speed regulation control, to ensure the stability of the outlet temperature at 90 ℃ to 100 ℃. Inlet temperature reaches 350 - 400 ℃, adjust the motor speed, control the body of the drying tower, import export temperature conditions under the design temperature.

6, observe the equipment () and other parts of the system operation is normal.

7, sampling and testing the quality of dry powder material qualified packaging, warehousing.

Second, flash dryer stopping procedures

1, wet material mixer mixing tank first station, and then stop the spiral feeder loading.

2, will continue to blow-dry the remaining material in the dryer, off after half an hour, through the gas, stop gas heating. After stopping the fan air supply, and then stop the induced draft fan wind.

3, stop flash dryer air compressor, stop blowback bag filter system, turn off the cooling water, turn off the tower body movement.

4, stop the instrument control.