Related problems of boiler corrosion deactivated 1, deactivate the boiler corrosion damage to the concept of corrosion occurring at the boiler cold standby, hot standby, or during servicing referred to deactivate corrosion. Disable boiler corrosion, primarily because the metal surface is not completely dried during the shutdown and oxygen in the atmosphere continues to leak into the cause. Although the internal and external boiler heating surface corrosion during shutdown occur simultaneously, but internal corrosion is more serious than external corrosion, so corrosion is mainly refers to disable the internal heating surface corrosion. 2, after the cause of corrosion disable shutdown, with decreasing pressure, temperature, boiler water vapor condenses into water, there will be a vacuum inside the boiler, outside air leakage into the furnace, oxygen and moisture vapor case, it is prone to corrosion of metals. Due to the structure of the boiler, if certain measures are not adopted, disabled corrosion is inevitable. Vertical e.g. superheater is not within the water in the superheater drained. When the internal heating surface metal junction with a water-soluble salt scale, will form a high concentration salt solution when it absorbs moisture, so that increased corrosion disabled, and the formation of ulcers corrosion. In this case the inlet of the superheater is often present. Because of the separated saturated steam is always when entering the superheater with a small amount of boiler water, saturated steam into the superheater absorb heat, water is evaporated into steam oven, and the boiler water containing salt is deposited on the inlet tube wall superheater. 3, disable corrosion prevention, mitigation method (1) In order to prevent or mitigate disabled corrosion protection measures should be adopted shutdown. Many shutdown protection methods, mainly divided into two categories: wet and dry protection protection. Wet disable protection commonly used in the short time, for example within one month. Wet common method is to protect the other peroxygen filled in boiler water, or an aqueous solution of alkali, maintaining a pressure of 0.3 ~ 0.5Mpa, to prevent air from leaking into the. (2) If a longer shutdown, or cold weather, in order to prevent freezing equipment, should be protected by a dry method. The method is: After shutdown, the temperature dropped to 70 ~ 80 ℃, the furnace let go all the water, using the water in the boiler will heat the entire heating surface evaporated to dryness, and dried with compressed air furnace without blowing vapor all off-contained anhydrous calcium chloride and then placed in the drum of the container. Per cubic meter of water volume ratio 0.5 ~ 1.0L of calcium chloride was placed (e.g., with lime according to 2kg / m3 basis), then the manhole is closed, periodically checked and found to be replaced when the desiccant into powder. (3) may be filled with nitrogen or ammonia gas charge protection, their preparation and use as a desiccant. Since ammonia is lighter than air, so protection during charging and ammonia, the ammonia gas should enter the upper exhaust air from the lower portion. Nitrogen is slightly lighter than air, can enter the upper portion of nitrogen from the exhaust air from the lower portion. To prevent air from leaking into, the pressure should be maintained 0.3-0.5Mpa, the pressure reduction should replenish ammonia or nitrogen.
According to fuel classification, vacuum phase change boiler is the most important method at present, which is convenient for people to choose and buy. With the deepening of industrialization and the increase of people's demand, vacuum phase change boilers account for more and more shares in the market. The characteristics of different types of vacuum phase change boilers determine its most suitable position. Based on this situation, we should understand its classification and other characteristics in order to make the right choice. We will now tell you about the characteristics of different types of vacuum phase change boilers. Vacuum phase change boiler can also be called vacuum boiler, whose working principle is vacuum and phase change. According to the fuel, it can be divided. There are four categories, but three of them can be divided into one class, so the following two categories are divided into two categories, and the characteristics of each class are described.
Because the internal vacuum boiler furnace is a vacuum state so that after heat medium is heated to evaporate inside condenses on the heat exchanger, so the use of the process than add another heating medium, but also more energy efficient than other types of boiler environmental protection. So if you know what are the main advantages of reliable vacuum boiler has it? Here to tell you about the various advantages of vacuum boiler.
Recently, Henan Province Industry and Information Technology Commission issued a public list on the Internet in 2018, Henan Province, manufacturing and integration of the development of pilot demonstration enterprises. Provincial and municipal levels of government through a rigorous screening, layers of review, the company boiler remote monitoring cloud services platform project as a key project in Anyang City was selected. Meanwhile, the provincial Industry and Information Technology Committee recommended that recommendation to declare: "The 2018 National Manufacturing and Internet convergence pilot and demonstration units."
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