Foreign biomass heating is common, heating of northern European biomass has become a major source of heat in small and medium-sized regions. According to the statistics, the biomass pellet heat supply accounts for 42% of the total energy consumption of heating energy in Northern Europe, which is the absolute main force of urban heating. Denmark consumes more than 60% of the country's energy consumption, while 72.8% of the urban district heating comes from biomass cogeneration and 670 biomass cogeneration projects provide heat to 60% of households. The biomass energy heating in Sweden accounts for 70% of the total heating energy consumption and the biomass fuel per capita consumes about 270 kg, ranking the first in the world. The heating of biomass boilers is relatively developed.
Biomass heating mainly includes biomass cogeneration and biomass boiler heating, flexible layout, wide range of application, suitable for urban civil heating and heating and replacing small and medium-sized industrial coal-fired oil-fired boilers. China's crop stalks and agricultural products processing residues, forestry residues and other biomass resources are rich, annual energy utilization of about 400 million tons of standard coal, the development of biomass heating has better resource conditions.
Biomass heating local collection of raw materials, local processing and conversion, the recent consumption, the construction of urban distribution of clean heating system, not only reduces rural open burning straw, but also provide clean heat, promote biomass transformation and upgrading. China's small and medium-sized coal-fired heating boilers, cleaning replacement heavier. Biomass heating in the terminal consumption directly substitute for coal, there is more room for development.
The development of biomass heat supply is still in its infancy, imperfect market cultivation, industrial system is not perfect, policy support is not enough. In order to effectively control the coal pollution in rural areas and provide clean heat supply for the new urbanization, we should increase support to speed up the industrialization of biomass heat supply, form a clean heating capacity, and replace large-scale coal-fired heat supply in the county .
From the history of clean heating in the cities and towns of the Nordic countries, it is worth learning from China that biomass should be used instead of coal to implement "double substitution" of fuel substitution and electricity substitution to transform small and medium-sized coal-fired power plants into biomass cogeneration.