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To build greener homes, recently, the ecological environment of the Office of Hebei Province issued "on improving air quality guidance on the implementation of regional differentiation of access environment." "Opinions" clearly states: Shijiazhuang, Baoding and other eight cities as a red zone atmospheric transmission channel, a ban on new industrial projects and expansion of 10 large iron and steel, thermal power, cement and so on.

"Opinions" also pointed out that the province's administrative regions and the municipalities and districts male An District, Dingzhou City, Xinji City administrative area, is strictly prohibited new construction, expansion (except for cogeneration and the same amount of alternative projects) coal; a ban on new , expansion of production capacity of iron and steel, cement, plate glass, petrochemicals project (excluding off-site relocation of upgrading) and 35 tons of steam coal-fired boilers; prohibit new emissions intensity below the access conditions of other industrial projects.

Handan, Xingtai, Shijiazhuang, Baoding, Langfang, Tangshan, Dingzhou, classified as a red zone xinji atmospheric transmission channel. Within this administrative area (except city back removal capacity), to prohibit new and expanded (except equivalent replacement) steel, thermal power (except CHP), coke, cement, lime, gypsum, fertilizer, general casting of ferrous alloys, iron alloys smelting, carbon, other industrial projects using coal as a fuel; Jing Kun high-speed east, north wing black high speed, and Langfang, Baoding and Beijing bordering county area designated as coal ban areas, not in addition to the approval of central heating coal-fired project.

Future, Hebei Province, will strengthen self-examination, government oversight and something in the ex post regulation, the implementation of various construction projects of environmental protection requirements as well as changes in environmental quality, pollutant emissions such as the implementation of dynamic monitoring of the implementation of environmental access requirements for non-construction strictly punished according to the law project, supervise the rectification of the problem is serious, shut down or banned. Meanwhile, according to relevant laws and regulations, environmental protection requirements and regional environmental quality changes and other regional differentiation environmental access requirements will be adjusted in due course.

Especially for the high sulfur content, it can reduce the CO2 emission through add limestone inthe boiler. It also can reduce the cauterization to the boiler and pollution to the environment. Moreover, the dust can be the mixing material for the cement.

Matters needing attention in use of condensing Boiler

Condensing boiler can recover heat from boiler smoke and latent heat of steam condensation in flue gas to improve service efficiency of condensing boiler and reduce harmful gas in flue gas. So it will soon become the future development direction of boiler technology. Driven by this new form, consumers also buy condensing boilers in succession, so in the use of condensing boilers, what aspects do consumers need to pay attention to in the use of condensing boilers?

1. pay attention to cleaning: in the cleaning process, the main role of the pickling inhibitor is to prevent metal corrosion during pickling of condensing boilers, in most cases, Many people choose to use their eyes to test the cleaning of condensing boilers. However, visual inspection can only see whether the cleaning is clean, ignoring the most important indicators of cleaning-the corrosion rate and the amount of corrosion. The rate of corrosion and the amount of corrosion is invisible to the naked eye. Therefore, consumers should also know how to measure the rate of corrosion and the amount of corrosion; in the cleaning process, the use of down-in, up-out or up-in-out circulation mode, the installation of temporary cleaning circulation pipeline in multiple locations, so that the pot barrel, Steam drum, pyrotechnic pipe, riser pipe, drop pipe and header can be circulating by cleaning pump to keep the concentration of cleaning fluid balanced, which will enable insoluble matter to be discharged from the boiler after cleaning. So as to prevent a large number of dirt from falling off and accumulating, resulting in boiler "tube explosion" accident.

The double horizontal pot water tube boiler is mainly composed of upper and lower horizontal pots, convection tube bundles, water wall tubes, down tubes and headers. The front part of the boiler is a furnace, and a water-cooled wall is arranged around the furnace; the upper and lower horizontal drums are located at the rear of the furnace, and the two drums are connected by a curved water pipe. Most of the combustion equipment uses superheaters, economizers and air preheaters. The high-temperature flue gas flows from the upper part of the furnace to the convection flue through the heater. It first rises upwards and then rises in an S shape, flushes the convection tube bundle laterally, and then folds down into the tail flue, and then passes through the economizer and air. The heat exchanger is exhausted by an induced draft fan and a chimney. The boiler evaporation is generally less than 20 tons / hour (t / h), the working pressure is less than 2.5 MPa (MPa).

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