What is the cost of natural gas, fuel and biomass? There has been a lot of controversy about how to choose as an enterprise.
Say a real case:
There is an enterprise in Xuzhou, Jiangsu Province who has a 4-ton coal-fired boiler that needs to be renovated due to environment prolution.The local environmental protection department recommends to use natural gas or electric energy. And the enterprise does not know the cost situation, it chose natural gas to replace coal-fired. It invested and newly installed gas-fired boiler. After one month's renovation, it was changed into natural gas-fired boiler. It took less than 100 days for the industry to produce, and it suddenly announced that it had stopped production.
The reason for the shutdown is very unexpected, not because the environmental protection of the factory is not up to the standard, nor is the product quality of the enterprise is not good, not to mention the sales problems, the enterprise said the original, "natural gas can not afford to burn, the cost increase is equal to do it for free!"
In addition to coal, we actually have other energy options. We can choose to burn fuel oil, biomass particles, biomass compacts, or wood, wood chips, peanut shells and other fuels. What are the operating costs of these fuels? See the most thorough analysis of fuel costs at present.
In this paper, the operation cost of 1 ton of steam boiler is calculated, and the cost(RNB) of using various fuels is compared by taking 600,000 calories per hour heat output as an example.
1. The operation cost of electric boilers is as follows:
600,000 kcal/ 860 kcal/deg 96%*0.9 yuan/deg = 653 yuan/t steam
2. The operation cost of diesel oil is as follows:
600,000 kcal/10,200 kcal/kg 90%*7.3 yuan/kg = 475 yuan per ton of steam
3. The operation cost of natural gas is as follows:
600,000 kcal/8500 kcal/cubic/90%*3.6 yuan/cubic = 281 yuan per ton of steam
4. The operation cost of biomass particles is as follows (calculated by the butt gas boiler of biomass particle burner, the thermal efficiency of gas boiler is 90%, the thermal efficiency of biomass particle burner is 95%, and the comprehensive efficiency is 85.5%).
600,000 kcal/4000 kcal/kg/ 85.5%*1.1 yuan/kg = 195 yuan/ton steam
5. The operation cost of biomass wood chips is as follows (calculated by the butt gas boiler of the biomass peanut shell particle burner, the thermal efficiency of the gas boiler is 90%, the thermal efficiency of the biomass peanut shell particle burner is 95%, and the comprehensive efficiency is 85.5%).
600,000 kcal / 3800 kcal/kg / 85.5%*0.7 yuan/kg = 140 yuan/ton steam
6. The operation cost of coal combustion is as follows:
600,000 kcal/5500 Kcal /65%*0.95 yuan/kg=159 yuan/ton steam
CONCLUSION: Biomass wood chips < coal burning < biomass particles < natural gas < heavy oil < electricity
Above is the cost calculation of the common energy used in industrial boiler retrofitting. The calculation formula is: the heat required to produce 1 ton of steam is equal to the heat value per unit volume, and the thermal efficiency of equipment is equal to the operating cost of 1 ton of steam.
* Because of the different fuel prices and system thermal efficiency, the actual cost will be different. If your actual situation is different from the above data, you can take your actual situation into account and calculate the operation according to this formula. For the prices of biomass fuels in different places, you can convert them according to the actual prices in different places.
Do you clear how to save cost now?
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