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calculation of heat transfer on fire tube boiler

10 tons of gas hot water calculation of heat transfer on fire tube boiler depreciation calculation depreciation is due to the gradual loss of fixed assets transferred in the course of the merchandise or the cost of that part of the value to go, but also business due to the use of fixed assets used in its production process assessed useful life of fixed assets cost money. 10 tons of gas hot water boilers are industrial boiler, equipment belonging to the class. In accordance with the Enterprise Income Tax Law, depreciation of fixed assets a minimum period of 10 years, residual rate set at 5% or 10%. If the 10 tons / hr of a gas hot water boiler for heating use, should process equipment, mutatis mutandis, the age of 10 years. In calculating the depreciation of fixed assets, in addition to foreign-funded enterprises to deduct the residual value according to the proportion of 5%. Assuming that the cost of 10 t / h of gas hot water boiler purchase of 500,000, the annual depreciation amount of the boiler: 500000- (500,000 * 5%) / 10 = 497,500 yuan. Suppose residual rate set at 5%, is expected to use for 10 years, the 10 tons / hour of industrial gas boiler depreciation rate = (1-5%) / 10 * 100% = 9.5% of the 10 t / h of gas hot water boiler monthly depreciation rate = 9.5% ÷ 12 = 0.79%. The monthly depreciation 10 tons / hour gas hot water boiler = 0.79% * 500,000 = 3950 yuan. In recent years, as an environmentally friendly gas-fired boiler to get the type of boiler widely welcomed by all walks of life, whether it is the depreciation rate for the gas boiler, the initial investment, annual operating costs and environmental aspects of government policy, gas boiler has played a great advantage. If you want to know more aspects of the gas boiler, please feel free online consultation fast Boiler Co., Ltd.

Why should the calculation of heat transfer on fire tube boiler pickling? How pickling? The main purpose is to remove pickling boiler evaporated in the boiler heating surface iron, copper dirt, impurities such as dissolved iron, but also eliminate the effect of the silica, scale and the like. The pickling process is essentially a process of etching the inner surface layer, it is divided into two kinds of circulation pickling acid and allowed to stand. 1, the circulation of boiler waterwall acid is divided into several loops, after pickling flush water. First water was heated to 40 ~ 50 ℃, then use of cyclic dosing, adding acid. I.e., inhibitor before adding, until uniform, using pickling acid pump from the lower header of a group of injection water wall, the drum after being discharged from the lower header of another set of water wall. In order to ensure good pickling effect, the acid should be greater than the flow rate of 0.3m / s. In order not to flow into the superheater acid, pickling acid level in the drum should be maintained at a lower level visible. 2, standing pickling. Acid with an acid is injected into the pump from the water wall lower header, and maintain a certain height, a puddle is discharged after 4h. And also alkali and washed with water after pickling, so that all contact with the metal surface to give an acid basified.

Boiler safety prevention knowledge (HTHP article) 1, high temperature and pressure equipment or piping good insulation, to prevent the exposed portion of burns. 2, the calculation of heat transfer on fire tube boiler operates at high temperatures and pressures, should wear clothing anti-scalding, Glove, helmet and wear necessary labor protection. 3, the process leak, the pressure should be, the temperature may be controlled within the operating range (0.1MPa, 80 ℃) of. 4, the switch valves, not being on the valve body, so as not to hurt the steam leak. When the trap open, pay attention to the foot of the drains, to prevent burns. 5, playing to prevent burns coke, coke at the end of play, collect the tools, in a safe position, so as not to trip or burn others. 6, the leak sound heard, the exact location can not be determined, the blood pressure should be shutdown to find traces of water, to determine leakage. 7, superheated steam leaks allowed to close, after the test paper or cloth, to determine the exact location.

China's energy revolution continues in depth. According to the director of the National Energy Regulatory Agency, Mr. Li Ye provided by the 2018 annual generating capacity of 6.8 trillion kwh of nuclear power, hydropower, wind power, solar energy and other non-fossil energy accounted for about 30%.

In total energy consumption of 4.62 billion tons of standard coal, a non-fossil energy accounted for 14.3%. Li Ye said the 2020 schedule is expected to achieve a 15% share of the consumer target. Coal in primary energy consumption is first reduced to 60%.

According to local NPC and CPPCC news recently held a show in 2019, and more through the sky to defend the war, to production capacity and other strategies, from industrial, civil and other aspects, to further reduce coal consumption, increase the use of natural gas, solar, wind power and other energy varieties . "Minus coal" has become an important theme in 2019 to promote local energy reform.

By contrast, natural gas production has improved throughout the year, an increase of 7.5% last year, to reach 161 billion cubic meters; imported 90.39 million tons, an increase of 31.9%, increase speed to accelerate to 5%.

At the same time, optimize the structure of power, nuclear power, wind power, solar power double-digit growth, increased by 18.7% over the previous year, 16.6% and 19.6%.

Outside central planning, where two sessions news shows, Beijing, Tianjin, Hebei, Liaoning, Heilongjiang, Hubei, Henan, Anhui, Fujian, Sichuan, Xinjiang and other provinces (cities, districts) made from the resolve of coal production capacity, exit behind coal units , clean heating, natural gas pipeline network construction of related facilities, the development of various aspects of clean energy such as power production, transportation and consumption, promote energy revolution.

Beijing, Tianjin, Hebei, Henan, Anhui and other places, our total coal consumption has been identified as key areas of control. Of the total coal consumption in 2018 before four regions decreased by 10% compared with 2015, down 5% in Anhui Yangtze River Delta region is located.

Beijing: According to the statistics show that in 2018, Beijing completed 450 village "coal to clean energy", the basic Plains Coal-free, high-quality clean energy accounted for more than 96%, the basic bid farewell to coal pollution. To prevent this complex burning coal for a rebound, no coal rank consolidate control results.

Tianjin: 2018, Tianjin has also ushered in the $ 18 billion Three Gorges Group offshore wind projects, the completion of coal to electricity, gas and central heating coal to build up a total of 238,000. 2019 will promote low-nitrogen transformation and construction work clean diesel transformation of mechanical gas-fired boilers, in an orderly urban and rural residents clean alternative to coal for heating.

Hebei: 2018, Hebei Yajian completed 14.01 million tons of coal, thermal power 550,000 kilowatts; 2019 will continue to promote coal reduction mission, planned Yajian 10 million tons of coal, 500,000 kilowatts of thermal power, continue to implement the clean winter heating engineering.

Henan: Henan last year to resolve the coal production capacity 8.25 million tons, the elimination of backward coal units 1.077 million kilowatts. This year plans to phase out coal units behind the transformation of about 1.5 million kilowatts, the main city of Zhengzhou City, to promote coal units cleared and the main city of Luoyang coal units basically cleared to accelerate the development of clean power, new renewable energy power generation installed capacity of 1.8 million kilowatts .

Henan Province is the only one mentioned in clean energy consumptive province, 2019 will continue to promote energy outside the lead channel construction, the province interoperability, optimizing the energy structure and layout. Comprehensively promote green electricity into the Henan construction, improve the ability to absorb foreign clean.

Qinghai: According to preliminary statistics, director of State Grid Energy Research Institute, the Institute for New Energy and statistics, in 2018 the scope of the province supporting the new energy transport grid construction, new energy sources to enhance the delivery capacity of 3.5 million kilowatts. Qinghai photovoltaic power generation efficiency of over 95%.

Anhui: Anhui Province last year to exit the coal production capacity 6.9 million tons, the new renewable energy power generation installed capacity of 3.05 million kilowatts; energy-saving plan to complete the upgrading of more than 1.26 million kilowatts coal units this year, to promote the reduction of coal consumption alternative, withdraw excess coal production capacity of 1.65 million Ton.

Sichuan: The hydroelectric province, the focus of China's largest clean energy base in Sichuan in the "alternative energy", will accelerate this year to enhance the level of electrification, transforming the province's abundant clean energy advantages into development advantages; to focus on deepening the reform of power factor markets reform, construction of hydropower absorptive industries demonstration zone, the development of large data, electrolytic hydrogen and other green energy carrier industry.

Fujian: Fujian will accelerate to promote nuclear power, pumped storage, LNG receiving station, natural gas pipeline network and other major energy projects, for new annual installed capacity of more than 2 million kilowatts of power; perfect system of paid use of environmental resources by energy rights.

Deputy director of the Energy Development Center edify the National Energy Renewable represent the future of green certificates market will be issued towards the expansion of the scope of the certificate, the adjustment period, transactions, etc. due to the quota should be monitoring and evaluating mechanisms obligations, non-hydro renewable energy, expand trading partners development direction.

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