Oil-fired gas boilers belong to both oil and gas boilers, which can use both oil fuels and gas fuels. They have a wide range of applications and are therefore favored by more and more users. However, we cannot ignore the regular maintenance of oil and gas boilers, which can effectively extend the service life of the boiler and reduce losses. Zhengzhou Fangkuai Boiler Factory summarizes the following maintenance methods for oil and gas boilers, hoping to help you better operate boiler equipment.
First of all, it is necessary to check the body of the oil-fired gas boiler, focusing on checking whether there is water leakage in the boiler body, boiler scaling, carbon deposition in the flue pipe, whether the boiler is leaking, and whether the flue and chimney are unobstructed. .
Secondly, it is necessary to regularly descale the oil-fired gas boiler, and the following methods can be selected:
1. When the boiler is shut down for a short period of time, it is more convenient to use wet maintenance. First, drain the water in the hot water boiler, remove the scale and dirt in the boiler, close all the valves and holes of the boiler, inject the softened water into the boiler, and dissolve the prepared sodium hydroxide or trisodium phosphate into the boiler; Then heat the boiler water to 100°C under a slight fire, and let the gas in the water discharge out of the furnace. When the boiler water emerges from the air valve, close the air valve, water supply valve, furnace door and baffle, and seal the boiler well. The general method for preparing the alkaline solution is to add 5-8 kg of sodium hydroxide or 10-12 kg of trisodium phosphate per ton of water.
2. When the boiler stops for a long time, it is more suitable to use dry maintenance. First, drain the water in the boiler, remove the scale and dirt in the boiler, inject the softened water into the boiler, and increase the pressure of the boiler to 0.1MPa with a slight fire, and then stop the combustion; when the temperature and pressure of the furnace are reduced, open the blowdown again. The valve discharges the boiler water and uses the waste heat of the boiler to dry the boiler; then place a desiccant in the furnace, close all valves and holes, and seal the boiler. The desiccant generally uses quicklime or silica gel. The amount of quicklime is 2 to 3 kg per cubic meter of volume, and 1 to 3 kg of silica gel per cubic meter of volume. The desiccant should be placed in an open container and placed evenly; in the future, it should be checked every 1 to 2 months, and the silica gel can be re-dried and reused after failure.
3. Maintain the valves, pressure gauges, thermometers and automatic exhaust valves on the hot water pipe network. Check the anti-corrosion layer and insulation on the surface of the pipeline, the indication of the pressure gauge thermometer, the single flow, the stop valve, the automatic exhaust valve and the manual exhaust valve at the end, and repair and replace it in time if any problem is found.
4. Cleaning and anti-corrosion of the boiler's hot water pipe network. The hot water pipe network is treated with sewage, water quality testing, and softened water replacement, etc. The entire hot water pipe network is wet-maintained and then filled with softened water, and all valves are closed.
5. The maintenance of the burner of the oil-fired gas boiler is mainly to clean the carbon deposits inside the burner, clean the burner nozzle, clean the fan, clean the control device, etc. and seal the burner with a plastic bag.
6. Maintain and maintain the circulating pump and feed water pump of the oil-fired gas boiler, inspect, repair and replace bearings, water seals, noise, wiring, etc.
7. Carry out maintenance on the softening water equipment, whether the water softener is running normally, whether the salt tank and hose are leaking, whether the resin is effective, etc., and repair the problem immediately; after the repair, remove the power plug of the water softener and pour out the salt tank the salt water in the water softener and the connecting pipe of the salt canister with tape.