Why not use the boiler drum steel plate manufacturing to thin its thickness? Drum internal diameter utility boilers typically 1.6-1.8m, to withstand high pressure, so the drum wall is also thicker. High pressure boiler drum about the above wall thickness of about 100mm, a wall thickness of boiler drum Subcritical some of around 200mm, made of carbon steel or low alloy steel multi can weigh more than 100 tons or more. The main reason is not manufactured steel plate: (1) drum operating pressure is high, but the working temperature is the saturation temperature corresponding to a pressure, typically below 350 deg.] C, up to 364 deg.] C only, therefore, not necessary to use high-strength alloy steel. (2) a cold steel, hot workability, weldability especially much worse than steel. (3) The stress concentration factor than alloy steel. (4) alloy is expensive. For these reasons, the general carbon steel drum with high (20g, 22g) and low alloy steel (e.g., 16Mn) produced.
Problem analysis of the deformation of the heating surface of the offer for steam boiler 1, the heating surface modification phenomenon a. Waterwall tubes or deformation of the door to see the fire door from the saw, when accompanied by water, can see the red curved water wall tube. B of the horizontal combustion furnace of the boiler, can be seen from the observation hole furnace wall to the fire front side of the deformation. 2. Heating Surface modification of a. Serious boiler water, heating surface of the cooling pot of water had to be thermally deformed. b. poor design structure. The local circulation flow rate is too low, stagnation, that the wall temperature exceeds the allowable temperature deformation. c. Install error, the pressure receiving member is not free to expand. D. substandard quality, thick scale, excessive water residue.
This year, Hubei Province, will continue to carry out prevention and control of air pollution control, effectively promote the province's environmental air quality improved, and issued the "2019 Annual Hubei ecological system of air pollution prevention and control program of work", as follows.
First, ultra-low emissions and actively promote the transformation of key industries. The province's new coal-fired thermal power units fully implemented ultra-low emissions standards. Actively promote small coal-fired thermal power ultra-low emission transformation, Wuhan, Xiangyang, Yichang and other places to complete before the end of 2019. Circulating fluidized bed boiler unit to achieve ultra-low emissions before the year 2019, tobacco dust W flame boiler units, to achieve ultra-low sulfur dioxide emission limit requirements. Ultra-low emissions and actively promote the transformation of the steel industry, the whole process to reduce air pollutant emissions.
Second, the depth of key industries mentioned standard upgrade. Promote the implementation of major cities in key industries especially emission limits, strictly enforce the "Notice on the implementation of some key cities in particular air pollutants emission limits" (Provincial Environmental Protection Bureau Bulletin 2018 No. 2), advance planning to enact governance project, and accelerating coking industry desulfurization and denitrification projects. According to the national unified deployment and actively carry out industrial furnaces governance special action. Complete waste discharge permit issued in accordance with the work list management requirements.
Third, the total coal consumption in key areas to promote control. Actively cooperate with relevant departments to implement controls total coal consumption in key areas, focusing on reduction of non-coal for electricity. With the relevant departments to promote the commercial coal quality control and supervision of bulk coal sales, strengthen the management and control of coal consumption, promoting the use of clean coal.
Fourth, the optimal adjustment of high-pollution fuel combustion zone ban. Control Department of Ecology Environment "high-pollution fuel directory" to improve the demand by the City People's Government in accordance with the ambient air quality, energy consumption structure and affordability, local conditions choose ban combustion zone ban burning of the fuel mix category, supervise the implementation of the relevant control requirements. Urban cities and states to complete high-pollution fuel combustion zone ban optimal adjustment before the end of 2019.
Fifth, to carry out rectification of coal-fired boilers. Carry out coal-fired boilers out of looking back, resolutely combat the resurgence of acts of the boiler has been eliminated. The county level and above urban area actively eliminate 10 tons of steam per hour coal-fired boilers and furnaces and tea, operating the stove, grain storage and drying equipment, coal-fired facilities, in principle, to a new 35 tons of steam per hour of fuel coal boiler. Actively promote the upgrading coal-fired boilers environmental protection facilities renovation and construction of facilities on-line monitoring, adherence to the "gas will change," the principle of steady progress "from coal to gas."
WNS series condensing gas boiler, which is very energy-saving effect is prominent feature of saving two devices arranged on the boiler, are ND steel, energy-saving effect, low exhaust gas temperature employed.
What causes flooding in steam boilers - why is the steam boiler water level too high? Here we explain the various causes of excessive water levels in a steam heating boiler. Keeping the proper amount of water in a steam boiler is a critical function for both safety and to avoid damaging the boiler itself.Learn More
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With more than 5000 units and 150 years of experience, our water-tube package and industrial boilers have an established reputation for reliability and proven performance in a wide range of industries and applications. We offer shop-assembled or modularized bottom-supported designs for oil, natural gas and other gaseous and liquid fuels.Learn More
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While both steam boiler designs offer comparable efficiencies, they are not interchangeable. This is primarily due to structural considerations. Because of their greater structural integrity, water-tube boilers are specified in all situations where operating pressures of 250 pounds per square inch gauge or greater are required.Learn More
Fulton offers a full range of hydronic boiler products for the commercial heating market, including condensing, non-condensing, and dual-fuel options. Our ultra-high efficiency condensing boilers are designed to provide significant energy savings in a variety of environmental conditions.Learn More