Paper is an important material used daily for different purposes. The global production of paper and cardboard stood at approximately 411 million metric tons in 2016. More than half of that production was attributable to packaging paper, almost one third was attributable to graphic paper. The world's three largest paper producing countries are China, the United States, and Japan. Paper industry is high polluted, the pollution comes from wast water and solid waste, such as rotten pulp, bark, wood chips, grass roots, coal ash residues. Sitong Boiler pays attention to the high-tech boilers for paper industries, produce thermal energy by taking uses of the wastes, such as bark, wood chips, grass roots, and coal ash residues, to reduce the waste pollution. Sitong Boiler has offered hundreds boilers to different type paper industries, we could design the boilers based on specific requirement.