coal fired industry boiler

coal fired industry boiler

Because of the characteristics of domestic resource structure coal once had a large proportion in the resource structure so the coal-fired coal fired industry boiler was also in a prominent position in the market. However, with the change of resource structure and environmental pollution in recent years, gas-fired boilers are gradually replacing coal-fired boilers and becoming the main force of the new market because of their natural advantages. Gas-fired boiler market is gradually obvious, has its own obvious advantages, the following comparative analysis of the advantages of gas-fired boilers. Gas-fired boilers are fueled by natural gas, which burns rapidly and produces great power, so it is also efficient, and its efficiency is 50% higher than that of coal-fired boilers. . Although natural gas prices are higher than coal prices, apart from the cost of fuel, as long as the pipeline can be invested. Coal-fired boilers, in addition to fuel costs, transportation costs, labor costs, storage costs, etc., the overall price is not cheap. Therefore, from the cost-effective point of view, natural gas as a whole has more advantages. Natural gas is one of the most environmentally friendly sources of energy by far because of its abundant combustion, clean combustion and pollution-free emissions. Coal combustion emissions sulfur, ash content is more serious pollution to the environment, which is also incomparable with gas-fired boiler. Gas-fired boilers can bring greater environmental benefits to enterprises.

Coal-fired coal fired industry boiler to gas boiler advantages: China's major coal-fired boilers used to be the life of heating and industrial boilers being used. Total annual use of coal because coal-fired boilers consumed 600 million tons. According to incomplete statistics, China's total industrial coal-fired boilers is 60 million units. Visible large proportion of coal-fired boilers in China's industrial life, the breadth of coverage. The thermal efficiency of the boiler runs produced generally much lower than the gas boiler, emissions has doubled. Therefore, the transformation of coal-fired boilers to gas-fired boiler is imperative. From central to local government organs at all levels to join all the positive trend of the gas boiler of them, in order to reduce emissions, improve production efficiency to do their part.

Recently, Wuhan City, introduced in 2019 to embrace the blue sky action plan for speeding up the optimization and upgrading of industrial structure, promote the optimization of energy structure adjustment, implementation of transportation restructuring, deepen industrial pollution control and other tasks proposed solution.

Among them, in terms of optimization and upgrading of industrial structure, we will study and formulate more stringent industry access threshold, no new heavy chemical and paper industry projects within 1 km of the Yangtze River and Hanjiang River shoreline. Strict implementation of ecological protection red line, the bottom line of environmental quality, resource utilization on the line, environmental access a list of constraints.

In optimizing the energy structure, the city's ban on new coal-fired generating units, supporting the construction of new projects is prohibited owned coal-fired power stations, will not be new coal-fired boilers. Increase efforts to promote green buildings, new buildings full implementation of green building standards. In deepening the industrial pollution control, referring to Beijing and Xi'an subsidies, launched a comprehensive transformation of low nitrogen gas boiler. Before the end of 2019, the district completed at least 50% of the area within the low-nitrogen transformation tasks 10 steam tons / hour or more gas-fired boiler.

Today I saw that when the capacity is the same, the furnace of the oil-fired coal fired industry boiler is smaller than that of the coal-fired boiler. Why? The specific reasons are as follows: the size of furnace volume, after the boiler capacity is determined, mainly depends on the volume of heat load. The size of the volumetric heat load is mainly determined by the type of fuel. After the fuel enters the furnace, it will take a certain amount of time to burn out. Fuel is usually required to burn out before it leaves the furnace. It is obvious that pulverized coal will burn longer than oil, that is, the flame of coal combustion will be longer than that of oil. In order to ensure the long-term safe operation of the boiler, it is necessary not only to prevent the slagging of the boiler, but also to make the temperature of the flue gas at the furnace outlet begin to change compared with the ash in the flue gas The temperature is 50 ℃ lower than 100 ℃ to prevent slagging at the furnace outlet and subsequent convection heating surfaces. The ash content of coal is more than that of coal-burning furnace, and the flue gas temperature of furnace outlet is 1050 ℃ and 1100 ℃. There is no danger of slagging in the furnace because of the low ash content in the oil, and do not consider the slagging problem of the slag discharge tube at the exit of the furnace, so the smoke temperature at the exit of the furnace can be higher.

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