What are the maintenance methods for Suzhou boilers ?
First, stress maintenance
It is suitable for the production of standby boilers or boilers with a short maintenance period of no more than one week.
① After the furnace is stopped, drain all the boiler water, clean up the scale and water slag in the furnace, and add qualified softened water again.
② Regularly heat with low fire, or use the steam of adjacent boilers to heat the boiler water regularly, so that the temperature of the boiler water in the boiler should be kept at ambient temperature + 10 ℃ in summer, and the boiler water should not be frozen in winter, and all vent valves should be closed. , Drain valve and drain valve to prevent water leakage.
③ The boiler feeds water regularly and keeps the internal pressure of the boiler at 0.05MPa ~ 0.1MPa to prevent air from entering the drum.
Second, wet maintenance
Wet maintenance is generally applicable to the maintenance of boilers with a shutdown time of less than one month.
① After the furnace is stopped, drain the furnace water according to the prescribed time, and clear the scale, water slag and soot.
② Close all manholes, handholes, valves, etc., to completely isolate the boiler from operation.
③ Prepare qualified protective solution with qualified demineralized water. Add 8kg ~ 10kg of sodium hydroxide Na (OH) or 20kg of sodium carbonate (NaC03) or 20kg of sodium phosphate (Na2P03) per ton of furnace water.
④ Use a special pump to inject the prepared alkaline maintenance solution into the boiler.
⑤ After the protective solution is fully injected, open the water supply valve to fill the boiler with qualified demineralized water until the water overflows from the air valve, then close the air valve and the water supply valve, and open the dedicated pump cycle to make the solution mix evenly.
⑥ During the entire maintenance period, the heating surface should be kept dry externally with a micro-fire oven on a regular basis. The pump cycle should be turned on regularly to make the solution concentration consistent everywhere. It is also necessary to take a solution test and replenish the solution regularly to make the solution pH 10 ~ Between 12, to ensure the alkalinity of the boiler water.
相应 Take appropriate anti-freezing measures in winter.
Third, dry maintenance
Dry maintenance is applicable for longer periods of boiler shutdown, generally longer than one month, especially heating water boilers that are not used in summer.
① After the furnace is stopped, drain the furnace water to clear the scale, water slag and soot on the heating surface in the furnace.
② Close the valves on the boiler's water supply pipe, water supply pipe, and sewage pipe, or block them with a partition to completely isolate them from other operating boilers.
③ Open the manhole and hand hole to allow the boiler to dry naturally. If the boiler is wet, dry the boiler body, furnace wall and flue with a slight fire.
④ Use appropriate amount of desiccant. Commonly used desiccants are anhydrous calcium chloride (CaCl2) and quicklime (CaO2). CaCl2 is quantitatively placed at a volume of 2kg per cubic meter of water, and particles of about 15mm are required. Quicklime is quantitatively placed at a volume of 3kg per cubic meter of water, and 10mm is required ~ 30mm blocks.
⑤ After the boiler is dried, put the tray containing the desiccant into the furnace and the drum to absorb moisture. It is required that the desiccant should not be in direct contact with the heating surface of the boiler.
⑥ The desiccant should be inspected regularly once a week in the boiler for one month to see if the heated surface is corroded, and the failed desiccant should be replaced in a timely manner, and inspected every half a month after one month.
Use the above three methods to maintain the boiler. The method of selecting maintenance should be determined according to the status of the gas-fired hot water boiler. It cannot be performed blindly. If the boiler worker cannot complete it, he must consult the relevant staff to help complete the extension of the hot water boiler. Use time.
Suzhou Tayuan Boiler Co., Ltd.
Contact: Manager Wu
Address: No. 188 Wanchen Road, Wangting Town, Xiangcheng District, Suzhou City, Jiangsu Province