coal heating hot water boiler

coal heating hot water boiler

Exhaust gas temperature factors affect the efficiency of the boiler 1. High boilers (1) ring-shaped heating surface. A protective pot operation due to the heated area ash causing poor heat transfer. Secondly heating surface by erosion wear of the high temperature flue gas, resulting in good convection bank vent for taking soil pipe powder blocking manner with less number F, powder powder increases the number of block f will inevitably result in decreased heat transfer effect of the heating surface, the deterioration of the operating parameters. such that the exhaust gas temperature medium (2) bits leakage furnace, the burner burning roll. Wind refuse mud furnace, burner combustion burning material will travel in incomplete protection technology, resulting in frameshift flame, which led to the degree of BU smoke Mi (3) poor operating conditions. A secondary air must have appropriate warehouse Shan ratio during burning. Secondary air Diao large ring-shaped hold burning effect, will affect the wind. Powder mix. 2. boiler water quality factors is an important indicator of pot care, but also a very appropriate to link, the water quality directly affects the safe and economical operation of boiler protection, internal cleaning of the heating surface of each pier can add endothermic t, It will increase the efficiency of the care of the pot. Shanghai each newly installed boiler heating surfaces are clean, the indicators are good, heat transfer efficiency is higher. But with longer run time, the inside of the tube or bi or furring rights corrosion, resulting in decreased heat transfer efficiency, pot nursing efficiency drops, after scaling or corrosion deterioration. Pot can also cause over-temperature protection wall even Los iron . 3. mechanical incomplete Tanzania Heat loss if the twist burner for burning Yan basin, coal dust mixed into the retaining find not carried out, resulting in insufficient fuel you burn. Shan increase mechanical incomplete burning loss. On the other hand due to air leakage protection Mu. Mi will lead to reduced care. Shan burn rate of decline. Powder fire longer, is not conducive to coal combustion rate, resulting in an incomplete tender burn solid increase in losses. Division personnel to operate the operation level of the level 4. 0 operator is not high, not be reasonably performed with the wind, the rotation speed control discharge protection, timely cleaning, descaling, resulting worthy material is not completely burned proud. Long low thermal efficiency in the actual operation, often occurs due to the experience of the operating personnel, resulting in decreased operating efficiency of the unit, adjust the low level of security decline. 'On the other hand, there is a difference operator P forced cultural quality and the level of practical skills.

What puzzled the boiler is more common and must be addressed? Pulverized coal boiler with pulverized coal boiler, which is a concept right? Boiler flue gas flow, which specifically refer to? Well, boiler water phosphate Why controlled between 5-15? In addition, there are other questions related to the boiler. These are important points related to the boiler. Therefore, the following will be specifically answered immediately, so that we can clearly understand.

Environmental situation is not optimistic that China has issued a number of environmental policy, the full range of safeguards ecological environment. Provinces are also actively to improve environmental protection, recently, Ningxia Hui Autonomous Region winter heating boiler proposed implementation. details as follows.

"Clean heating embodiment of Ningxia Hui Autonomous Region (2018 Year - 2021)," recently released, "plan" put forward, Ningxia heating the status quo, to develop clean heating, the use of clean energy alternative to coal and dispersed living coal, reducing coal consumption and soot emissions, improve environmental quality in urban and rural atmosphere.

By the end of 2017, Ningxia urban and rural housing construction for heating a total area of ​​380 million square meters, of which the city building heating area of ​​about 240 million square meters, rural buildings for heating an area of ​​about 140 million square meters. Clean heating total area of ​​about 180 million square meters, accounting for about 47% of the region's total heating area. Among them, prefecture-level city clean heating an area of ​​about 120 million square meters, clean heating rate of about 75%; counties (cities, districts) Clean heating an area of ​​about 50 million square meters, clean heating rate of about 62%; rural clean heating area of ​​about 14.72 million square, clean heating rate of about 10%.

After the "plan" put forward, Ningxia, according to the "central heating mainly to the substitution of gas for coal as the first, supplemented by electricity instead of coal," the idea, according to local conditions, scientific planning, coordination implementation. City, county (district) the main city clean coal-fired co-generation, large-scale energy saving boiler central heating heat source as the basis for strengthening efforts to shut down within a small range of central heating boilers of coal. Promote cogeneration units and ultra-low emissions transformation of large boilers, improving the environmental standards.

In urban and rural interface and rural areas, in accordance with the principles of the easier issues first, and start cleaning centralized heating schools, kindergartens, hospitals and other public buildings start to play an exemplary role. The conditions of the area to promote gas boiler; encourage nearby collected plant biomass feedstock, biomass briquette forming process instead of bulk coal; encourage livestock waste, straw and other raw material for the biogas fermentation and purified, for clean heating; actively promote the development of geothermal resources as a centralized or decentralized heating heat source; support for residents to install solar hot water, electric heating equipment, such as housing, agriculture greenhouses, farms; do not have clean heating conditions actively implement clean coal alternative bulk coal.

"Plan" clearly, Ningxia will accelerate cogeneration, waste heat utilization, the cell set into a piece of construction heating boilers, focusing on the completion of the Western Xia thermoelectric (two) central heating, in Nanjing Tianyuan thermoelectric, Helan back pressure Heating Unit central heating and other projects, the completion of thermoelectric Zhongwei, Wuzhong thermoelectric, thermoelectric Dawukou LIUPANSHAN thermoelectric renovation project, to further expand the central heating area. City, county (district) heating should vigorously promote the "coal to gas," "coal to electricity", according to local conditions the development of renewable energy for heating, a pair of old, energy-saving secondary pipe network, heating network system to enhance efficiency.

Ningxia will be fully phased out small coal-fired boilers, coal-fired boiler to deepen the comprehensive compliance management, municipalities, county (district) urban area out of 20 tons of steam / hour coal-fired boilers. Yinchuan City urban area to total phase-out project cogeneration district heating pipe network covering all coal-fired heating boilers in the region. It does not have the "coal to gas," "coal to electricity" conditions in rural areas, to achieve clean coal production and warehouse distribution center full coverage, full implementation of clean coal alternative bulk coal.

Ningxia Hui Autonomous Region in the 2018-2021 four-year, with the full complement of winter heating boiler, will replace all cleaner energy boiler coal-fired boiler, to protect people's health.

Low temperature corrosion of boiler fuel than coal-fired boilers serious reason these days after another customer asked why there are low-temperature corrosion of boiler fuel serious than coal-fired boilers, small and together we discuss in this article address this issue. When little understanding of the chemistry of you might know equal sulfur content greater body oil and coal, but asked what the low-temperature corrosion of boiler fuel in general it is much more serious than the coal-fired boilers? For two main reasons: a coal-fired boiler, pulverized coal fired boiler in particular, 90% of the coal ash in the flue gas is taken away, fumes generated in the sulfuric acid vapor is adsorbed by fly ash in the flue gas, so that the smoke sulfuric acid vapor in the gas is reduced; coal combustion, about half of the sulfur remaining in the ash. While combustion of oil, the sulfur content of the fuel is almost complete conversion of SO2, the fuel ash few, little fly ash in the flue gas, the flue gas adsorption capacity of the sulfuric acid vapor is weak. 2. higher hydrogen content fuel oil in the boiler, about 11% to 12%, combustion can produce about one ton per ton of fuel vapor, when the fuel in the flue gas water vapor partial pressure higher than when coal, lignite but because it contains more water exception table below. Above the dew point of water vapor in the flue gas so that the fuel for two reasons, the concentration of sulfuric acid vapor in the flue gas is large, when the sulfuric acid vapor in the flue gas is not only a so-called thermodynamic point of water vapor partial pressure is low is formed, as shown in Table 1 shown in FIG. When the flue gas in a small amount of sulfuric acid vapor, the flue gas dew point of significantly increased. Effect of sulfuric acid concentration on the corrosion rate is large, typically at a sulfuric acid concentration of 40% to 50%, the fastest etching. Due to the fuel, the flue gas dew point is not only high, but the sulfuric acid concentration in the air preheater heating surface is also formed large, not to say in small series, we will come to a low temperature corrosion of boiler fuel ratio of coal-fired boiler this conclusion is serious.

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