Improper loading and temperature control of materials can cause fires or quality accidents
Plums are high sugar and heat sensitive materials, and improper loading and temperature control are the primary causes of accidents.
Overloading and excessive stacking are strictly prohibited: The material loading capacity must not exceed the maximum rated capacity of the equipment, and must be evenly laid out. Overloading, close contact with the inner wall, or blocking the air duct are strictly prohibited. Overloading can cause poor circulation of hot air, local heat accumulation, and in mild cases, the plums may become charred and internal moisture cannot be discharged, while in severe cases, the materials may ignite due to temperature control.
Strictly monitor the drying temperature: The drying temperature of plums is usually controlled at 60-70 ℃, and it is strictly prohibited to operate at excessive temperature and load. The equipment must be equipped with an over temperature alarm device and an automatic shut-off device that are independent of the control system. During operation, temperature parameters need to be recorded every hour. If abnormal temperature fluctuations or a burnt smell are detected, the emergency stop button must be immediately pressed to cut off the heat source.
Adequate cooling is required after shutdown: After drying, the heating system must be turned off first, and the ventilation/blowing system must continue to operate for heat dissipation. Only when the internal temperature of the equipment drops to a safe range (usually below 50 ℃), can the fan be stopped and the door cover be opened for unloading. It is strictly prohibited to open the door directly at high temperatures to prevent burns from hot air or spontaneous combustion of materials when exposed to oxygen.
⚙️  Lack of protection for transmission machinery leads to entanglement and compression injuries
Drying equipment is usually equipped with moving parts such as circulating fans, conveyors, chains, etc. Mechanical injuries are a common type of personal injury.
The protective cover must be complete and firm: all exposed moving parts (such as pulleys, chains, gears, fan impellers) must be equipped with safety protective covers that meet standards, and the interlocking devices must be sensitive and reliable. When the protective cover is missing or loose, it is strictly prohibited to turn on the machine for operation.
It is strictly prohibited to come into contact with dangerous parts during operation: During the operation of the equipment, it is strictly prohibited to touch the operating mechanism, cross the equipment, or bring body parts close to dangerous parts such as the agitator, belt, and elevator feeding inlet with hands. It is strictly prohibited to open maintenance doors, observation holes, or reach out to clean internal materials during operation. If it must be opened, the machine must be stopped first and energy isolation measures must be taken.
Strictly implement the "lock and tag out" procedure: Before equipment maintenance, cleaning, or upkeep, the machine must be completely shut down, all power sources (power and gas sources) must be cut off, the cut-off point must be locked, and a warning sign reading "Do not close, someone is working" must be hung to release residual pressure and heat. Only after confirming that there are no hazardous energy residues can work be carried out.
🔥  Fire or electric shock caused by hidden dangers in heat sources and electrical systems
Drying equipment operates in high temperature and high humidity environments for a long time, and the heat source and electrical system are high-risk areas for accidents.
Heat source safety management: For gas or oil fired drying equipment, it is necessary to regularly check the pipeline valves for leaks. It is strictly prohibited to use volatile fuels such as gasoline for ignition fuel, and refueling is prohibited during the operation of the burner. It is strictly prohibited to stack flammable and explosive materials within 1 meter around the heat source. A safe distance of at least 1 meter should be maintained between the front, back, left, and right sides of the hot air stove and the wall.
Electrical system specifications: The power supply voltage should be stable within the range of ± 5% of the rated voltage, and a secondary leakage protection device should be installed with reliable grounding. It is strictly prohibited to connect wires privately or randomly, and wires must not be placed in the passage. It is prohibited to operate electrical switches with wet hands. The insulation of electrical circuits should be checked regularly, and any aging or damage should be replaced immediately.
Dust explosion risk prevention: In the drying workshop, combustible dust such as plum debris and fruit powder accumulates to the explosive limit, making it highly susceptible to explosions when exposed to open flames, static electricity, or high-temperature surfaces. Effective dust removal equipment must be equipped and dust accumulation in the air ducts and dust removal rooms must be regularly cleaned. Electrical equipment in dust prone areas should be explosion-proof, and smoking is strictly prohibited in the work area.

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