Method for recovery and reuse of tail gas of pulping continuous distillation blowing pot

Abstract

The invention relates to the field of recovery and reuse of tail gas of a continuous distillation blowing pot in a pulping industry and discloses a method for recovery and reuse of tail gas of a pulping continuous distillation blowing pot. The method comprises preheating pulp in an obliquely spiral dehydrator, a preheating spiral conveyer, a digestion liquor barrel and a spiral conveyer in a bleaching vacuum pulp washer through tail vapor of a blowing pot so that the temperature of bagasse is increased. The method fully utilizes tail vapor of the blowing pot, reduces energy consumption and a production cost and protects the environment.

Description

technical field [0001] The invention relates to the field of recovery of tail steam from continuous steaming, spraying and discharging pots, in particular to a method for recycling and utilizing tail steam from continuous steaming, spraying and discharging pots of pulping. Background technique [0002] Sugarcane is one of the main raw materials for sugar production, and bagasse is a by-product of sugarcane processing and extraction in sugar factories. The large-scale industrial production of bagasse papermaking in my country began in 2006, and has developed rapidly with the progress of bagasse pulping and papermaking and alkali recovery technology. It is the fastest growing non-wood fiber raw material in recent years. The fiber content of bagasse is similar to that of wood, the fiber length is about 0.65-2.17mm, and the width is 0.021-0.028mm. The two ends of the bagasse fiber are pointed, and the interweaving force is good. Especially after the sugar is squeezed, it can b...

AI Technical Summary

Problems solved by technology

The cooking liquid is directly heated by the first and second pumping steam provided by the power workshop (the process requires that the temperature of the cooking liquid should reach above 85 degrees before entering the continuous steaming pipe); the bagasse before entering the continuous steaming pipe is directly fed without any preheating treatment The shaft is transported into the continuous steaming pipe, and the low-pressure steam brought out by the spraying process after cooking is directly discharged to the air, resulting in waste of waste heat; bleaching section 1 # The slurry in the standpipe of the thickening pump in the bleaching machine is directly heated by the first-pump and second-pump steam supplied by the power plant; this results in an increase in the amount of fresh steam used, which means the loss of combustion energy and the exhaust gas generated by combustion. increase the burden on the environment

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