Water into steam necessary to heat absorption, its heat from the fuel, the fuel and air to the combustion heat can be bonded oxide after combustion of the fuel into the high-temperature combustion products (flue gas), this process is the fuel chemical energy into thermal energy of combustion products during a high temperature and flue gases through the heat transfer surfaces of a variety of heating, thermal energy pass water, after absorbing water into steam, the endothermic steam is further superheated steam of a high temperature, and therefore, gas working fluid distribution within a single steam cfb boiler in europe sugar industry water and steam, fuel and air and must have.
Of all the heat losses in a chamber furnace, the heat loss from exhaust smoke was the largest, at about 4% and 8%. The main factors affecting the size of Q2 are exhaust volume and exhaust temperature. Exhaust volume is large, exhaust temperature is high, exhaust heat loss is large. In general, Q _ 2 increases by about 1% when the exhaust temperature is increased by 10 ℃ and 15 ℃. Reduce the exhaust temperature, can reduce the heat loss of exhaust smoke. But it is unreasonable and impermissible to lower the exhaust temperature. In order to reduce the exhaust temperature, the heating area at the end of the boiler will be increased, which not only increases the steel consumption, but also increases the flow resistance on the exhaust side, so it is necessary to consume more energy in operation. In addition, the exhaust temperature should be kept higher in order to reduce the low temperature corrosion of the tail heated surface, especially when the fuel with high sulfur content is used. Therefore, reasonable exhaust temperature should be determined by technical and economic comparison. For modern large and medium-sized boilers, the exhaust gas temperature is usually 110 ℃ 160 ℃.
Recently, the field of ecological environment of Shanxi thorough investigation of illegal activities, promotion of eco-environmental quality of Shanxi be greatly improved, the central group held a provincial environmental inspectors rectification illegal sewage major renovation "Hundred Days cleared" special action mobilization meeting, asked the province up and down quickly action to ensure that the "Hundred Days cleared" special action to achieve tangible results.
"Clear Days" special action include 10 aspects: the central environmental protection inspectors and inspectors "looking back" clear feedback issues; national air pollution control and strengthen supervision and three cities in northern Shanxi air pollution control special inspection found problems rectification task clear; focus on the problem of sewage from polluting units cleared; "ban on coal zone" bulk coal cleared; "scattered dirt" enterprise is cleared; key areas of coal-fired boilers cleared out of the task; urban area construction site dust pollution problem is cleared ; diesel truck phenomenon of black smoke cleared; cities above the county level and type of surface water environmental violations centralized drinking water source protection areas cleared; annual key water pollution control project is completed cleared.
Clear focus: focus on examination of 624 key polluting units of pollution control facilities, operation and pollutant emissions. Implementation of the rectification May inform the Provincial Department of environment and supervise the handling of seriously overweight key sewage units - one by one to verify the fourth quarter of 2018, in 2019 the Department of Ecology and Environment informed the first quarter supervise the handling of seriously overweight key polluting units, 2019 1 situation and the implementation of administrative penalties.
Specific objectives: In addition to coal coal ban areas, central heating and raw material coal companies, prohibit the storage, distribution and burning of coal and its products, slashing the average concentration of sulfur dioxide in the ambient air quality.
Clear focus: the use of coal for municipalities within the scope of "no coal zone" in the home spot checks to ensure that alternative livelihood and heating coal for clean energy or clean heating methods is strictly prohibited within the store "ban on coal zone" sales and burning the behavior of coal and its products.
Clear Focus: targeted surveillance cities out of the task list of coal-fired boilers. In built-up areas to ensure that municipalities and districts out of 35 tons and coal-fired boilers, county (city) eliminated the basis of built-up area and 10 tons of coal-fired boilers on October 1, 2019, Taiyuan, Yangquan, Linfen City, Jinzhong city, four global, Luliang Fenyang, Xiaoyi, the text of water, Jiaocheng, Yuncheng salt lake, Wenxi, Xinjiang, Jishan, Hejin global phase-out of 35 tons of steam coal-fired boilers, Changzhi city completed 35 tons of steam out of the task more than 50% of the amount of coal-fired boilers, Jincheng complete 20 tons of steam coal-fired boilers eliminated within the municipal area.
Gas cfb boiler in europe sugar industry is conveyed to the fuel pipe only need to build, without increasing the fuel storage facility, prior to feeding the fuel combustion process and without preparation device, the system is greatly simplified.