Typical cases of industrial water-saving technology equipment and applications in the paper industry

The water consumption of the paper industry accounts for about 4% of the total industrial water consumption. It has the characteristics of complex composition and high content of difficult-to-treat substances. In order to promote water saving and pollution reduction in the industry, the National Catalogue of Industrial Water Saving Processes, Technologies and Equipment (2019) selected a total of 13 water saving technical equipment in the paper industry, such as high-pressure washing and water-saving technology of net carpets and cascade utilization of paper making Water-saving technology, etc.

The high-pressure washing and water-saving technology of the carpet uses the high-pressure water impact of the high-pressure mobile sprinkler to penetrate the carpet and break up the fine fibers, fillers, rubber and other dirt on the surface of the carpet, effectively washing and removing the dirt in the gaps of the carpet . Compared with normal pressure washing, the water consumption is smaller and the washing effect is better. Taking the application effect of Zhejiang Jingxing Paper Co., Ltd. as an example, the ordinary spray device of the paper machine mesh and press section was transformed into a high-pressure spray device. After normal operation, the annual water saving is 880,000 cubic meters. It is estimated that in the next 5 years, the proportion of popularization and application of this technology will reach 80%, and the annual water saving will be 80 million cubic meters.

The papermaking cascade utilizes water-saving technology and is suitable for a variety of comprehensive pulp and paper enterprises. By establishing a high-level and low-level water bill mode in the system, the water is redistributed according to quality and quantity to maximize the reuse rate of water. Reduce the amount of fresh water. Taking the application effect of China Metallurgical Paper Galaxy Co., Ltd. as an example, new collection tanks, white water flotation devices, and intermediate water reuse facilities are built in the factory to realize the use of water from high to low steps in each production process. After normal operation, the annual festival Water is 2.6 million cubic meters. It is estimated that in the next 5 years, the proportion of popularization and application of this technology can reach 10%, which can achieve an annual water saving of about 80 million cubic meters.