Drying and deodorization in paper mills

NegotiableUpdate on 03/10

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Overview

Drying and deodorization in paper mills: The hydrogen sulfide and ammonia in the odor exhaust gas of paper mills not only harm health, but also exacerbate environmental pollution. Through the combination process of "chemical absorption+biological filtration", a certain enterprise successfully reduced the concentration of pollutants to a safe range, providing an efficient treatment solution for the industry.

Product Details

Drying and deodorization in paper millsGovernance: Overcoming the difficulties of hydrogen sulfide and ammonia emissions

In the process of paper production, processes such as pulping and steaming release odorous exhaust gases containing pollutants such as hydrogen sulfide and ammonia. These exhaust gases not only emit pungent odors, seriously affecting the quality of life of surrounding residents, but also pose a threat to human health. For example, hydrogen sulfide is neurotoxic, and ammonia can irritate the respiratory tract and eyes. In addition, the release of hydrogen sulfide and ammonia into the atmosphere can also contribute to the formation of environmental problems such as acid rain and haze. Therefore, the treatment of odor and exhaust gas from paper mills is urgently needed.

There are many difficulties in the treatment of waste gas containing hydrogen sulfide and ammonia in paper mills. On the one hand, the composition of exhaust gas is complex, and in addition to hydrogen sulfide and ammonia, it may also contain other volatile organic compounds, which increases the difficulty of treatment; On the other hand, exhaust emissions have intermittency, fluctuation, and unstable concentration and flow rate, which puts higher demands on the adaptability and stability of treatment equipment.

At present, there are various commonly used treatment technologies for waste gases such as paper mills. Biological methods utilize the metabolic processes of microorganisms to convert hydrogen sulfide and ammonia into harmless substances. This method has the advantages of low operating costs and no secondary pollution, but the treatment efficiency is greatly affected by environmental factors such as temperature, humidity, and pH value; Chemical absorption method removes hydrogen sulfide and ammonia from exhaust gas by reacting with specific absorbents. This method has high treatment efficiency, but the consumption and regeneration of absorbents require certain costs; The adsorption method uses activated carbon and other adsorption materials to adsorb pollutants in exhaust gas. The operation is simple, but the adsorbent needs to be regenerated or replaced after reaching saturation, which also incurs certain costs.