... the environmental standards, green low-cost biomass is imperative, for the use of oil, gas, electricity, boiler ... can also purchase their own production, the cost of 290 yuan per ton or so. 3: ... than coal-fired boiler with cost savings of 30-40%, the annual cost savings of 10 million yuan, more than ... with burning oil, burning gas cost savings of 50-70%, the annual cost savings of up to 30 million or ...