To further promote the comprehensive management of coal-fired boilers, Jincheng City, Shanxi Province, according to "Jincheng Blue win the Battle of three-year action plan" requirements, plans to complete 109 units of 10-20 tons of steam "small coal-fired boilers" within this year the phase-out, at the same time, Jincheng will start working out of 35 tons of steam coal-fired boilers.

This year, Jincheng counties (cities, districts) the environmental sector will urge the relevant enterprises and institutions to eliminate the basis of 10 tons of steam and coal-fired boilers on in 2018 to accelerate the phase-out and 20 tons of steam coal-fired boilers. This year, the city to complete 109 units (10-20 tons of steam boilers) working out of a total of 589.5 tons of steam boilers; at the same time, Jincheng will also speed up the foundation and 20 tons of steam coal-fired boiler out, start 35 tons of steam phase out coal-fired boilers, in principle, within the city's new domain-wide 35 tons of steam coal-fired boilers.

In addition, Jincheng will accelerate the transformation of ultra-low emission. Before the end of September this year, the city will complete 52 units (65 tons of steam per hour and higher coal-fired boilers) coal-fired heating boilers ultra-low total of 4530 tons of steam boilers transformation, and the county (city) built-up area, biomass boilers emissions transformation. After transformation, under condition of the reference oxygen content of 6%, soot, sulfur dioxide, nitrogen oxides emission concentration of these boilers respectively not higher than 10 mg / m, 35 mg / m and 50 mg / m.

Transformation of low nitrogen in the combustion aspect, before the end of October, Jincheng station 610 will complete the transformation of low-nitrogen combustion Total 1940.15 tons of steam gas boiler, after completion of the transformation, the boiler NOx emission will not exceed 50 mg / m.

For boilers induced draft fan in the boiler flue gas is to take away the equipment, if the boiler during operation, the fuel incomplete combustion occurs, easy to produce nitrides, carbides and other harmful substances, if these gases are not timely removed, it will directly affect the efficiency of the boiler.

When steam is generated between the vertical wall surface of the gasoil steam boiler temperature difference exists in the vertical steam boiler and the steam boost heating process, the bubble exists between the temperature difference and the temperature difference along the thickness of the vertical wall, the inner wall temperature above the temperature of the outer wall, the upper wall surface when the temperature is above the lower case, to prevent excessive thermal stress, must be slow step of the vertical steam boiler. Vertical steam boiler during ignition and during the boosting, the vertical steam parameters of the steam boiler, the water level and the operating conditions of each component is constantly changing. Therefore, in order to effectively prevent the occurrence of abnormal conditions and other hazards, be sure to arrange professional staff to closely monitor changes in a variety of vertical steam boiler meter indication. Since the water temperature in the steam boiler vertical rising bubbles and an evaporator heating surface of the metal wall temperature began to rise at any time, need to pay attention to thermal expansion and the temperature of thermal stress, because the wall thickness of the bubbles is relatively thick, vertical steam boiler the main problem in the heating process is a thermal stress. At the same time, but also consider the overall thermal expansion problems, especially for a vertical tube steam boiler heating surface, because the thin wall thickness, length of problems in the heating process is a thermal expansion of the whole, but also pay attention to thermal stresses, prevent neglect caused the failure.

In the previous section we have given a formula for calculating fuel consumption, which will help customers. In the table below we present some common fuel calorific values, consumption, cost analysis and comparisons (based on 1 ton gasoil steam boiler calculation). I hope these can help customers.