In recent years, different process routes in the sulfuric acid industry in China have achieved certain results in heat recovery. The reporter learned from the China Sulfuric Acid Industry Association that the average energy consumption per unit of sulphuric acid products for sulphur acid and pyrite sulphuric acid production in 2011 was -130 kg standard coal/ton and -110 kg standard coal/ton respectively. According to incomplete statistics, in 2011, China's sulfur acid and pyrite-based acid recovery companies recovered 72.2 million tons of steam. Among them, 52.5 million tons of steam is recovered from sulfuric acid, and 19.70 million tons of steam is recovered from pyrite. This is equivalent to saving 10 million tons of standard coal and reducing carbon dioxide emissions by 25 million tons. The president of the China Sulfuric Acid Industry Association, Qi Wei, told reporters that the sulfuric acid industry can achieve such great achievements in energy recovery, and is inseparable from the continuous progress of thermal energy recovery technology and the vigorous promotion of industry associations in recent years. The low temperature heat recovery technology of sulfuric acid production is the biggest bright spot in the energy conservation and consumption reduction work of the sulfuric acid industry in recent years. This technology maximizes the recovery of all waste heat in the production of sulfuric acid, increasing the heat recovery rate of sulfidic acid from 60% to 70% in the past to more than 90%, and increasing the steam production per ton of acid from 1 to 1.2 tons. 1.7 to 1.8 tons. According to incomplete statistics, China currently has 55 sets of low-temperature heat recovery units for sulphuric acid production, with a sulphuric acid production capacity of 23 million tons, accounting for 51% of the total sulphuric acid production capacity; 27 sets of equipment under construction and 11 million tons of sulphuric acid production capacity. Pyrite-based acid generators have also done a lot of work in recovering thermal energy and achieved phased results. The specific energy-saving transformation includes heating the boiling bottom air with the flue gas of 300°C~320°C at the exit of the electrostatic precipitator, increasing the combustion heat of the boiling furnace, heating the desalinated water with the excess heat of the conversion process, and heating the boiler feed water at the low temperature position of the absorption section to improve the overall device. The heat recovery rate can make tons of acid production steam to reach more than 1.6 tons. The low-temperature heat recovery technology of pyrite-based acid production is one of the important potential points for energy conservation in the sulfuric acid industry in the future. "At present, the technology is in the final stage of research. I believe that with the joint efforts of industry players and related research institutes, the technology will soon be successfully tackled and widely used," Qi said. The enterprises that use smelting flue gas to make acid also begin to recover the waste heat of the conversion process. The steam production per ton of acid can reach about 300 kg. For example, the 1.6 million tons sulfuric acid project in Fangchenggang, Jinchuan is building a low-temperature heat recovery unit, which is expected to be effective next year. Qi Qi also pointed out that there are still many problems to be solved in the energy-saving work in the sulfuric acid industry. First of all, there are a large number of small and medium-sized enterprises in China. Due to small scale and insufficient funds, various advanced energy-saving technologies are difficult to promote in small and medium-sized enterprises, resulting in large gaps in the energy consumption of small and medium-sized enterprises. This has seriously affected the energy efficiency of the entire sulfuric acid industry. Second, the production management of some small enterprises is not standardized or scientific. The training of operators is not enough. The lack of professional knowledge leads to the fact that enterprises do not use good things when they buy large amounts of money. The advanced energy-saving technologies and equipment that enterprises spend heavily on, due to the lack of scientific management, have always been unable to exert their best performance. Ionic Liquids,N-Ethylpyridinium Chloride 99%,N-Butyl-N-Methylpyrrolidinium Bromide Cas 93457-69-3,N-Ethylpyridinium Chloride Cas 2294-38-4 Henan Tianfu Chemical Co.,Ltd , https://www.tianfuchem.com