high efficiency coal boiler

Our case with 10-ton high efficiency coal boiler. Operating costs 10 tons of coal-fired boilers coal 600 yuan / ton, compared with 0.6 yuan / kg; calorific value 5500 kcal / kg; required heat 6 million kcal / hour and 10 ton boiler; coal boiler thermal efficiency 70-80 % (75% in accordance with our calculated): 10 tons of coal fired boiler 1 hour the desired amount: 6000000kcal / h ÷ 5500kcal ÷ 75% = 1455kg / h; 10 tons of coal boiler 1 hour investment costs: 1455 × 0.6 = about 873 yuan. 10 tons of gas boiler running costs of piped natural gas price of about 2.8 yuan / Nm3; calorific value of 8600 kcal / Nm3; thermal efficiency between 90% -95% (we calculated 90%); caloric needs 6 million is 10 ton boiler cards / hour, i.e. 77.52Nm3 / h; 10 tons of gas required for the gas boiler 1 hour: 6000000kcal / h ÷ 8600kcal ÷ 90% = 775.2Nm3 / h; 10 tons of gas boiler 1 hour run investment costs: 2.8 yuan / Nm3 × 775Nm3 / h = 2170 dollars.

10 t 1 hour run gas high efficiency coal boiler investment costs: 2.8 yuan / Nm3 × 775Nm3 / h = 2170 dollars.

NOTE: the above-mentioned coal and gas prices, for reference, the case may be, depending on local circumstances!

Wuhan Port District Social Welfare Institute (apartments for the elderly) is invested by the government pension services, with a total construction area of ​​38,000 square meters, 532 beds, mainly adopt destitute persons, social support on behalf of the elderly. Hope to provide welfare to the elderly year-round 24-hour hot water, the original high efficiency coal boiler equipment can not meet this demand, therefore, require additional purchase orphanage hot water boiler. After much investigation, in cooperation with the welfare determined fast boiler, provides three integrally condensing gas hot water boiler (WNS1.4-1.0 / 95/70-Y.Q) by a fast boiler.

Chemical plant high efficiency coal boiler combustion efficiency improvement measures which are not high chemical plant boiler combustion efficiency is not high improvement measures what? The low-temperature exhaust gas boiler combustion efficiency test, a higher excess air ratio, suggestions for improvement higher problems: 1, the excess air ratio due to lower general, industrial boilers was 1.4. Due to the different internal structure of each of the boilers, excess air coefficient can be adjusted according to the actual operation, there are sufficient coke burn time in the boiler. Additionally, secondary air may be suitably provided, coke sufficient oxygen for complete combustion, reducing the incomplete loss of solids. 2, due to lower exhaust gas temperature of the boiler exhaust gas temperature account for a large proportion of the boiler heat loss, so the loss of the boiler must be minimized. In one aspect, the dew point should be to prevent corrosion; the other hand, the exhaust gas temperature is not so high. 3, to improve the uniform distribution of air to the boiler furnace combustion efficiency, so as not to cause incomplete combustion of the coal formation dead. As the pilot were grate boiler, the moving speed of the chain should be controlled within a reasonable range of coal on the grate have enough time to complete combustion, but not too long so as not to waste grate. In addition, high-volatile coal, the coal should be possible to improve the quality, to shorten the combustion time, reduce the loss of solids of incomplete combustion.

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