delicate processing vacuum fire tube boiler price
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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.
What oil-fired boiler fuel oil boilers are generally burn diesel fuel, as well as specialty boiler fuel oil, black oil. But because diesel prices gradually rise and supply problems, and now are turning to fuel oil. (1) Crude: mined from below the ground, dehydrated, without refining petroleum. Crude oil can be refined and a variety of other products, directly as a fuel is extremely fair. (2) heavy: by cleavage of heavy oil, heavy vacuum reduced crude oil or a wax obtained by modulation in different proportions, certain grades and quality standards. (3) residue: residue in petroleum refining process, it may be treated directly as fuel supplied to the boiler, called the residual oil or oil residue diet. The main varieties are heavy and residual liquid fuel for power generation, the common features are: larger relative density and viscosity; flash point and a higher boiling, less volatile. (4) Diesel: Diesel is diesel fuel, as a boiler fuel is extremely economical. Diesel fuel generally used as a co-oil ignition and stable combustion pulverized coal boiler low load operation.
Desuperheaters gas steam boiler of the role and use of gas steam boiler desuperheater utility with negative pressure combustion process, why not suitable for heating gas steam boiler? This is because the pressure of gas steam boiler is very high, and the requirements of its pipes and accessories is relatively high. So, on this invisible, it will increase costs and expenses. In addition, the installation of a steam boiler is not very simple. Therefore, based on these factors before reaching this conclusion. What is the role of gas steam boiler desuperheater that? Desuperheaters gas steam boiler is generally in the supply pipe, its main role is to reduce the steam temperature, so as to achieve the desired requirements. Desuperheater in kind, type, and the main surface of the two water-jet. For the surface mounting of formula U-tube is a cylindrical tube body, or a recuperative heat exchanger. Water quality which cooling water is no special requirements, mainly in the scope of the low-pressure steam boiler. Gas-fired steam boiler vacuum boiler combustion whether beneficial? If the negative pressure combustion gas steam boiler, specifically refers to a combustion chamber of the boiler, i.e. the furnace, is less than one atmosphere. The means to achieve it, it is achieved by balancing the ventilation system. Pressurized combustion, which does not improve the speed of the combustion gas steam boiler, or to maintain combustion stability. If the conditions are bad, then seal the furnace, combustion positive pressure will increase insecurity, the work environment is unfavorable. Therefore, only the negative pressure combustion to avoid the above problems.