NOx treatment | Denitrification of recycled lead smelting flue gas: promoting the green transformation of the lead industry

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The recycled lead industry is developing healthily and promoting the upgrading of the lead industry. Under the dual-carbon target, the recycled lead industry urgently needs to reduce energy consumption and carbon emissions. Therefore, the denitrification technology of recycled lead smelting flue gas is of great significance for reducing environmental pollution and protecting human health.

With the strengthening of environmental protection policies and technological progress, the recycled lead industry is gradually developing in the direction of health, standardization and intelligence, which has promoted the technological upgrading and structural optimization of the entire lead industry. In the context of the dual-carbon goal, the recycled lead industry further reduces energy consumption and carbon emissions through the improvement of processes, equipment and fuels, and contributes to the realization of the country's carbon peak and carbon neutrality goals.

Recycled lead is widely used. Recycled lead refers to the lead material obtained after processing by recycling waste lead-acid batteries, waste lead products and other lead-containing waste. It has important applications in many fields. Recycled lead can be used to produce certain types of building materials, such as lead sheets and lead pipes. In the process of metal smelting, recycled lead can be used as an alloying element or reducing agent. The recycling of recycled lead helps to reduce the dependence on primary lead resources, save energy, reduce costs, and reduce environmental pollution.

The flue gas produced in the process of recycled lead smelting contains relatively high concentration of nitrogen oxides (NOx), which not only causes pollution to the environment, but also poses a threat to human health. It is of great significance to develop effective flue gas denitrification technology for realizing sustainable development of lead smelting industry.

Denitration technology is mainly divided into dry method and wet method two categories. Dry denitration technology includes selective catalytic reduction (SCR), selective non-catalytic reduction (SNCR) and so on. In view of the characteristics of recycled lead smelting flue gas, it is very important to choose the appropriate denitrification technology. Because of its high denitrification efficiency and stability, SCR technology has become a denitrification technology of recycled lead smelting flue gas. However, considering the cost and operating conditions, SNCR technology and absorption method also have a certain application space.

SCR technology is one of the most widely used denitration technologies in industry. It reduces NOx to nitrogen and water at lower temperatures through the action of a catalyst. SCR technology has the advantages of high denitration efficiency and stable operation.

The denitrification technology of recycled lead smelting flue gas is of great significance for reducing environmental pollution and protecting human health. With the increasingly stringent environmental regulations and the development of denitrification technology, future research will focus more on improving denitrification efficiency, reducing costs and realizing resource recycling.