0 7mw-70mw ce approved brown coal hot water boiler

0 7mw-70mw ce approved brown coal hot water boiler

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.

The method of adjusting the temperature of the superheated steam heating stove have? The method of adjusting the temperature of the superheated steam heating stove have? DC boiler steam temperature is mainly adjusted by adjusting the quantity of fuel to water. In actual operation, because the efficiency of boiler feed water and fuel heat enthalpy (depends on the water temperature) and the like will change, so the actual boiler operation to ensure the water-fuel ratio of the exact value is not easy. Coal-fired furnace will fluctuate because of the amount of coal and the amount of fuel due to the steam temperature. So, except DC boiler fuel to water ratio as the coarse adjustment means, but also must be used as a method of spray desuperheater means of fine-tuning adjustment. There is also some boiler flue gas recirculation, dampers and methods of the swing center of the flame as an auxiliary adjusting device.

Maintenance and installation instructions boiler environmental protection boiler water clean-up at least once a month: on the furnace grate string of pipes and water pipes at the water cross scale. Always check: valve, pipe, flow is flexible door sheet intact, to prevent clogging, damage should be found to repair and restoration. Cleaning at least once a week, and the boiler flue gas path surface fire, arch wall, Guanfan, pipe tobacco, soot and smoke chamber grime, etc., to keep the heating surface clean, stable heat transfer. When the water heater and heating system is installed, the main line and the last two are not allowed to just valving. Other air bag inlet pipe may be installed at each branch for adjusting the control valve system balance, the smaller is generally the closer the opening degree from the furnace, whereas the more distal opening degree increases. When the valve opening is adjusted to the proper position, not twist, so as not to influence the heating effect. Fill the tank water heaters is open, its role with the expansion tank. Prohibit any valve mounted on the furnace body and connected to the tank conduit. Usually the main pipe heating installation slope i = 0.005. Riser mounted to the vertical, per meter length of not more than 3 mm. A normal heating boiler water temperature should not exceed 85 ℃, such as the temperature exceeds the complement in order to continue running when the tank overflow tube or overflow a large number of air, immediately check the hot water circulation system shutdown has blocked until troubleshooting. When the water level inside the heating supply water should be kept in a glass of water gauge water line visible range, prohibiting see cast coal burning furnace at less than the case of the water level in the water gauge glass, causing the system to prevent water shortages. Boiler installation location should be close to a hot spot closer a distance as possible to reduce heat loss. Piping system may be depending on the use. Water heaters based on the principle of gravity circulating water, due to the small circulating water gravity pressure head, and therefore, the installation must be less than the last group of the furnace heating bag, the vertical distance is generally 0.5-1 meters.

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