New inventions that bring atmospheric pollution back to life

The three huge stainless steel pools lined up with a stainless steel pavilion. A large square of white briquette coal recovered its lost energy after being bathed in a pool, a pavilion, a meal, and a sauna. This set of energy-supplying equipment is called deactivated denitrification regeneration device, which can make the denitrification catalyst known as the antidote for atmospheric pollution “return to life”.

Today, the author learned from the Municipal Science and Technology Bureau that the deactivated denitrification regeneration device and catalyst regeneration compound formula and active repair formula have been successfully developed by the Ningbo Institute of Urban Environment Observation of the Chinese Academy of Sciences. This magical device enables the first inactivated catalyst to recover about 90% of its activity, and the cost is only about 1/4 of the purchase of new catalysts. This can not only greatly reduce the disposal cost of the denitration catalyst as solid waste, but also reduce the use of rare earth metals and save valuable resources. It is reported that this research has obtained 7 authorized patents.

In recent years, every autumn and winter, smog that spreads throughout the country threatens people's health. One of the main culprits in the formation of smog is fine PM2.5 in the air, and the nitrogen oxides emitted by thermal power plant boiler flue gas is one of the main precursors of PM2.5. At present, China's environmental protection governance has moved from the "desulfurization era" into the "denitration era." The key to flue gas denitrification in thermal power plants is the catalyst. However, the life of the catalyst is generally only 24,000 hours, and the activity will gradually decline during use. In developed countries, the application of regeneration technology for flue gas denitrification SCR catalysts has become more common. At home, the Ningbo Institute of Urban Environmental Observation of the Chinese Academy of Sciences has paid close attention to this technical problem earlier. Since 2011, the Ningbo Science and Technology Innovation Team led by Chen Jinsheng has focused on the analysis of the deactivation mechanism and causes of SCR (selective catalytic reduction) catalysts, developed an efficient catalyst regeneration compound formula and active repair formula, and successfully developed Deactivated denitrification regeneration device with industrial application.

“The market demand for denitrification catalysts in Ningbo is huge. Usually one cubic meter of catalyst is between 3.5 and 45,000 yuan. If it is lost after activity is changed, the purchase cost is too high, and disposal of the abandoned catalyst is not only expensive, but also causes secondary pollution. "Chen Jinsheng said that using ultrasonic chemical cleaning, active load, rinsing, drying and other processes through the regeneration process after the first deactivation, usually the service life can reach 22,000 hours, some catalysts even have the possibility of secondary regeneration.