At present, all parts of our country have issued the requirements for the demolition, shutdown or transformation of high-energy coal-fired hot blast stoves. Previously, the announcement on the implementation of the special emission limits of atmospheric pollutants issued by the Ministry of Environmental Protection also showed that China's environmental improvement will move from end-to-end treatment to source control. Relevant people said: China's industrial hot stoves in energy saving, emission reduction in two areas have great room for improvement. The reasons for the inefficiency of industrial hot-blast stoves are as follows: insufficient efficiency and high energy-saving potential. China's industrial hot-blast stoves are large in volume, small in average capacity and mainly coal-fired. Although the design efficiency of China's coal-fired industrial hot-blast stove is not much different from that of foreign countries, the actual operation efficiency is only about 65%, which is 10%-15% lower than the advanced level of foreign countries. A coal-fired hot-blast stove has achieved the greatest degree of energy saving and reduction through the technical transformation of condensate recovery, increasing the air temperature in the furnace and installing the stratified combustion of coal hoppers. The drainage effect saves about 2 million yuan a year. 我国燃煤工业热风炉运行效率不足的原因比较多。总结后，主要有几个方面：
There are many reasons for insufficient operation efficiency of hot blast stoves in coal-fired industry in China. After summarizing, there are mainly several aspects:
First, the design and manufacture of industrial hot blast stoves pay more attention to the compressed parts in the design, but not to the combustion devices.
2. Reasons for the use of industrial hot-blast stoves. The capacity chosen by users of hot-blast stoves does not match the actual capacity.
3. The types of coal used in industrial hot-blast stoves do not conform to the design types of coal used in hot-blast stoves. The calorific value, volatile matter or particle size of coal used do not conform to the design requirements of hot-blast stoves.
4. The relevant regulations and regulations on energy-saving supervision of industrial hot stoves are not perfect, and the technical standards are relatively lagging behind.
Revamping Technology of Hot-blast Furnace and Furnace into Mainstream
In the future, some old coal-fired hot stoves with low efficiency and serious environmental pollution will be eliminated, and the existing coal-fired hot stoves will be technically reformed according to local conditions. In areas rich in natural gas and other resources, coal is replaced by gas. In areas poor in gas resources, solar collectors are used to replace small coal-fired hot stoves and other measures.
At present, many manufacturers have chosen to reform the hot-blast stove. In the design and manufacture of industrial oil, gas and coal-fired hot-blast stove, in order to prevent the corrosion and ash plugging of the heating surface at the tail of the hot-blast stove, the standard smoke exhaust temperature is not less than 180 (?) C, up to 250 (?) C. High-temperature smoke emission not only causes a lot of heat energy waste, but also causes a lot of heat energy waste. Environment pollution.
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