What is the pulp boiling in the paper industry?
Pulp boiling in the paper industry is a pulping process in which paper raw materials and boiling liquor are placed in a boiler and the non-cellulose part of the fibrous material is removed by steam heating. The black liquor of paper boiling has high calorific value and good combustibility, which is an important autogenous energy source in the paper industry. Heat exchangers are an important part of the pulp process.
The TREP heat exchanger series can be used as a series of key energy saving equipment in the black liquor concentration process, which is an important measure to improve energy utilization and environmental protection in paper mills.
What are the functions of heat exchanger in paper industry?
Heat exchanger installed in the pulp workshop washing section of the heater, used to cool the black liquor containing a small amount of fibers sent over from the pulp washing equipment filtered by the cooking pulp production, cooled with tap water, feed water heating to produce hot water (waste heat energy recovery); for cooking white liquor (NaoH, Na2S solution) cooking heat exchanger, that is, the use of black liquor (after cooking washing pulp recovery filtrate) preheat pulp raw materials (wood chips, bamboo chips) cooking (high temperature, lye impregnation, fiber softening, decomposition) required lye.
In the paper industry, there are many processes in which heat exchange equipment is used: pulp process section (cooking, washing, bleaching, water treatment, waste heat recovery, waste water cooling, etc.), alkali recovery process section, paper copying process section (drying, waste steam waste heat recovery), boiler auxiliary machine, sewage treatment, exhaust gas treatment, even air conditioning heating, domestic hot water and other systems, we can see the figure of Jema heat exchanger.