The nitrogen protection air flow pulverizer is operated in a totally closed negative pressure cycle, and most of it is controlled by PLC programming to minimize human operation and control factors. The control cabinet can be placed in a separate control room far away. Automatic packaging machine is used for packaging and discharging. Monitoring probe is used for on-site observation, which can completely achieve unmanned operation
The air flow crusher with nitrogen protection has done a good job in terms of safety. Its main functions are as follows:
1. Isolate oxygen: before the equipment is started up for feeding, nitrogen is used to replace the air in the closed circulation system. At the same time, the closed feeding and unloading system can replace the less air brought in during the feeding and unloading process with nitrogen, so as to keep the oxygen content in the system basically stable. During the crushing process, the oxygen content tester is used to continuously monitor the oxygen content in the air flow. When the oxygen content exceeds a certain level, nitrogen will be added immediately to keep the oxygen content within the safety production standard.
2. Control the gas powder concentration: the feeding system is a fully enclosed, uniform speed device, which is programmed by the control cabinet. Totally enclosed plays a role in isolating oxygen. When the speed is constant, the material concentration inside the added equipment is controlled. The feeding speed can be set arbitrarily. If the materials added to the equipment at a uniform speed accumulate inside the equipment, the safety is not guaranteed. Therefore, the equipment shape, such as the bending angle of the pipe; The shape of each component is calculated scientifically to eliminate the dead space inside the equipment. At the same time, the powder will not accumulate in the pipeline due to the driving and scouring of high-speed airflow in the equipment.
3. Timely discharge static electricity and eliminate ignition source: special carbon steel wire filter material is used for pulse back blowing collector, which can eliminate static electricity in time and ensure that pulse dust cleaning is clean and complete. The equipment is all metal components, all of which are grounded to discharge powder static electricity.
4. Circulating air cooling: because the whole system is a closed circuit circulating system, there are several moving parts inside the equipment, which will produce a certain temperature during high-speed movement, and the temperature is critical to the safety during processing. Therefore, the equipment is equipped with a radiator type cooler on the pipeline, which can effectively reduce the potential safety hazards caused by the equipment working for a long time or in a high-temperature environment.
5. Explosion proof: the whole system is equipped with explosion-proof holes at different positions of the whole pipeline to reduce the loss in case of explosion and explosion caused by excessive pressure and concentration inside the system. The motors and other devices used in the whole system are explosion-proof motors with better sealing performance, effectively reducing the accumulation of dust.
6. Emergency shutdown: the equipment emergency shutdown trigger switch is connected to the oxygen content tester. If the oxygen content concentration monitored by the oxygen content tester does not reach the preset value within the scheduled time, the emergency shutdown is triggered, the equipment stops feeding, the induced draft fan stops, the classifier is delayed, and the nitrogen supplement system continues to work until it is manually shut down. Because of these functions, the nitrogen protection airflow crusher can operate safely