The fast boiler

What is the operating cost of a 6-ton gas-fired steam boiler?

Time : 2021-11-09
Gas boilers are classified according to the type of fuel used by the boiler. Their fuels include natural gas, coal gas, liquefied petroleum gas and biogas. But the most used fuel is natural gas, so gas boilers usually refer to natural gas boiler products.

  Before purchasing a boiler, users should not only consider the quality and price of the boiler, but also consider the thermal efficiency and operating cost of the boiler. Boiler is a kind of large-scale industrial equipment, and its later operating cost is not low. The boiler has high thermal efficiency, which can effectively reduce the operating cost of the boiler!

  So today we will calculate the operating cost of a gas boiler.

  Take a 6-ton gas-fired steam boiler as an example:

  1. Gas cost: The 6-ton gas-fired steam boiler has a rated steam output of 6 tons per hour, and the maximum gas consumption is 70 cubic meters. The gas cost is: 6*70*2.77=1163.4 yuan/hour.

  2. Electricity cost: The main electricity part of the 6-ton gas-fired steam boiler is the burner and the water pump, and the others are weak electricity. The burner power is 8kw, the water pump power is 7.5kw, and the other weak electricity is 2kw. The calculated electric power is (8kw+7.5kw+2kw)*0.65=11.37kw, the electricity cost is 1 yuan/kWh, and the electricity cost is 11.37kw*1=11.37 yuan/hour.

  3. Water cost: A 6-ton steam boiler can turn 6 tons of water into 6 tons of steam in one hour, and the water cost is 6*1.1*3.6=23.76 yuan/hour.

4. Labor cost: The gas-fired steam boiler is a fully automatic boiler, which only requires manual round-trip inspections. Two shifts are required. One inspector is calculated at a salary of 3,000 yuan per month, working 12 hours a day, and the cost of one hour is 3,000*2 person-times. /30 days/24 hours = 8.33 yuan/hour.

  Fifth, maintenance cost: The natural gas boiler is fully automatic boiler, the failure rate is very low, and the maintenance cost is also very low. The maintenance cost of a 6-ton gas-fired steam boiler is 10,000 a year. According to the maintenance cost of 365 days, 24 hours a day and one hour in a year, the maintenance cost of a 6-ton gas steam boiler is estimated to be 10000/365 days/24 hours = 1.14 yuan/hour.

6. Boiler cost and installation cost: 6-ton gas-fired steam boiler manufacturer quotes 458,500 yuan (including tax, including freight), local installation and commissioning report inspection fee of 95,000 yuan, calculated based on a 15-year service period (458500+95000)/15 years /365 days/24 hours=4.21 yuan/hour.

7. Boiler house infrastructure investment: The planned use of land in the drawing plan is 26m*17m=442m2. The manufacturer estimates the use area of ​​3 boilers: L=16m, W=15m, H=7m, and the planned construction area is 16m*15m= 240 square meters, the depreciation of the factory building is calculated based on 20 years 3000 yuan / square meters * 240 square meters = 720,000 yuan, 720,000 / 20 years / 365 days / 24 hours = 4.11 yuan / hour.

   8. Pipeline construction cost: The estimated straight-line distance from the steam pipe in the planned natural gas boiler area to the steam distribution valve in the production workshop is not less than 105 meters. Calculated based on the specifications of steam pipes currently used by industrialized companies, the reference cost for the production and installation of steam pipes to keep warm is 1,000 yuan/extended (overhead form, the overhead height of some road areas is not less than 4.7m, and the reference diameter of the steam pipe from the boiler room branch valve is DN65. , The thickness of the seamless steel pipe is not less than 3.5mm.) The service life is 10 years. According to the calculation method that the depreciation life of fixed assets under high corrosion conditions is not less than 60%, the set life is 6 years.

  To sum up, the operating cost of a 6-ton gas-fired steam boiler within one hour is as follows: 1163.4+11.37+23.76+1.14+4.21+(8.33+1.99+4.11)/2==1211.09 yuan/hour
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