MBS Special Nitrogen Closed Circuit Dryer
Application Scope The MBS type closed circuit nitrogen circulating horizontal boiling fluidized bed dryer/cooler is a kind of drying/cooling equipment that can be operated continuously or in a continuous manner;
it is especially suitable for dealing with flammable and explosive powders and fine granular materials; it is widely used in the fields of chemical industry, light industry, pharmaceuticals, foodstuffs, plastics, grains and oils, Widely used in chemical industry, light industry, medicine, food, plastics, grain, oil, slag, salt, sugar and other industries of the powder and fine granular materials, drying, cooling, humidification and other operations. Use of industry: medicine and food industry, food industry, chemical industry, mineral powder and other industries.
Two, the principle of work 1, the principle of brief description: nitrogen filling and exhausting process: close the corresponding pipeline electric valve, open the exhaust fan, pumping a certain amount of time, when the system pressure gauge displays a certain value, close the corresponding motorized valve, close the exhaust fan, open the nitrogen flushing motorized valve, nitrogen charging to the system; when the on-line oxygen detection device to measure the value of the system's residual oxygen is less than the required value, the program controller PLC When the value of oxygen residue in the system measured by online oxygen detection device is less than the required value, PLC of program controller sends out instruction to close the electric valve of nitrogen flushing, and the nitrogen charging process of the system is completed. Enter the next process. Drying process: open the circulation blower, open the radiator will be heated to the system temperature: the need for temperature; open the infinite frequency conversion speed of the feed off phoenix machine and discharge off fan, open the drainage pump, start drying process; hot air and horizontal boiling fluidized bed in the material for heat exchange, the exhaust from the horizontal boiling fluidized bed outlet, through the condensation of 106, demisting, cooling and de-watering, into the cycle of the blower, for drying. Circulation. After a certain period of drying, the finished product which meets the requirement of final water content is discharged from the dryer and collected, and the drying process is completed. Solvent condensation and recovery process: drying circulating wind through the circulating air duct, condenser condensation, solvent recovery by the water remover discharged from the system to collect. After removing the water in the circulating wind, it enters the drying host again to complete the solvent recovery process. System nitrogen protection: nitrogen protection, mainly by the line of oxygen detection instrument brake control, when the oxygen content exceeds the standard, automatically open the nitrogen pneumatic valve, nitrogen filling to the drying system, when the system oxygen residue is lower than the required value, automatically close the nitrogen pneumatic valve, to ensure that the system operates safely. System overpressure protection: when the system pressure exceeds the set value, the pressure detection device will act to open the pneumatic valve for evacuation, and the evacuation fan will run to evacuate automatically; when the system pressure meets the requirement, the pressure detection device will be reset to close the pneumatic valve for evacuation, the evacuation fan will run to evacuate, and the system will run normally. 2, equipment flow PID diagram: picture 1
Three, equipment features 1, nitrogen closed-circuit drying or cooling, widely used in the drying or cooling of flammable and explosive materials such as MBS; 2, fluidized heat transfer uniformity, no overheating and dead-end phenomenon, product quality is good; 3, the exit of the weir plate design adjustable, adjustable thickness of the material layer, to improve the yield; 4, the machine can be selected from steam, gas, fuel oil, Coal-fired heating heat source, the use of a wide range of options for users