Judgment and treatment of abnormal situations of tour guide oil boiler

1. Abnormal Circulation Pump Conditions

A. Lower circulating pump current than normal indicates decreased efficiency and flow rate. This may be due to scale and blockage in the heating pipeline, which should be cleaned.

B. If the pump pressure remains unchanged, the current increases, and the flow rate decreases, the heat transfer fluid is deteriorating and its viscosity has increased. It should be replaced or regenerated promptly. If the new heating transfer fluid contains water or decomposition gases have not been removed from the system, immediately open the bleed valve to release the gas.

C. Decreased pump current and zero outlet pump pressure indicate the pump is idling and not supplying oil. This may be due to oil vaporization. Identify the cause and take appropriate measures. If a clogged filter is causing the circulating pump to evacuate, immediately bypass the filter and clean it. If the new heating transfer fluid contains water or decomposition gases have not been removed from the system, immediately open the bleed valve to vent the air.

II. Low furnace outlet temperature, insufficient heating supply.

If the exhaust temperature exceeds 300°C, it is primarily due to ash accumulation, which should be blown out promptly. If the exhaust temperature is low, it is primarily due to combustion problems, primarily insufficient induced draft. Although the furnace is under positive pressure, the air volume is insufficient, resulting in low furnace temperature and insufficient combustion intensity. Special attention should be paid to checking the water seals at the slag discharger and the ash outlet of the dust collector at the rear of the furnace for proper sealing and for excessive cold air leakage.

3. If the pressure differential at the rear of the thermal oil furnace increases and the pump inlet pressure drops, the filter may be clogged. A bypass should be opened and the filter removed and cleaned.

4. Common Chain Grate Faults and Solutions

A. If the grate stops rotating, it may be because the chain is too loose, poorly meshing with the sprocket, or the sprocket is severely worn, resulting in a poor connection to the chain. Readjust the adjusting screws on both sides and tighten the grate. If it still does not rotate properly, replace the sprocket.

B. If it is stuck, the causes are often broken grate plates or loose grate plates due to pins falling off; metal inclusions in the coal blocking the grate; arched grate plates; or the tip of the slag stopper (eagle iron) sinking, blocking the grate. Solution: Use a wrench to reverse the grate to remove debris, replace the broken grate piece and then restart. If it gets stuck again after starting, stop the machine and check the cause in detail before solving the problem. If the eagle iron sinks, you can use iron hooks to pull the fire doors on both sides to straighten it.