Can coal-fired boilers still be used now?

Not in the urban first-and second-tier cities, but in other areas. It is forbidden to use coal-fired boilers in urban areas of first-tier cities and second-tier cities, such as Beijing and Shanghai. Because coal-fired boilers pollute the environment too much, only oil-fired and gas-fired boilers and environmental protection boilers can be used. However, coal-fired boilers can still be used in other areas, such as Datong, Shuozhou and other cities, and fashionable denitrification and desulfurization equipment can be used.