Chemical Filtration Solutions

Corrosion hazards in the pulp and papermaking process

The raw materials of the pulp and papermaking process undergo chemical treatment, generating a large amount of corrosive gas, which causes damage to the surrounding electronic and electrical equipment, especially in the places where key equipment and precision instruments are installed. Risks arise from the safe operation of electronic equipment, control rooms, process control systems and compressors.

Chemical filtration solutions

As a globally leading provider of experts in the control of chemically corrosive gases, our products and technologies serve major papermaking giants around the world and are renowned for our advanced air solution technologies.

For the specific demands of the papermaking industry, we have developed customized RZJ chemical filtration solutions, which effectively control air pollution and improve the production site and protect equipment. From on-site analysis of corrosive gases to selection and installation of chemical filter materials, filters, and chemical filtration equipment to continuous monitoring after sale, we provide a complete and systematic solution and service for controlling corrosive gases.

Lignin separation

In the pulping process, separating lignin from raw materials is a crucial technological step. Lignin must be dissolved in cellulose and then separated from the solution. There are two commonly used pulping methods: sulfate pulping and sulfite pulping. Different technological processes release different types of polluted gases and use different chemical filter materials. According to the environmental conditions of the project site, appropriate chemical filtration products and equipment should be selected to protect the safety of electronic devices, precision instruments and on-site workers.

Bleaching

When making paper with wood pulp, paper pulp and waste paper pulp, bleaching is an indispensable process to remove the colored substances in the pulp and improve its whiteness and purity. Lignin is the main cause of yellowing in pulping and needs to be further removed during the bleaching process. Commonly used bleaching agents include chlorine, oxygen, chlorine dioxide, hydrogen peroxide and ozone. Different bleaching agents will produce different polluting gases. If not removed, they will cause corrosion of machinery and equipment.