Production device and production process for preparing lime milk from ammonia distillation waste liquid

Abstract

The invention relates to a method for recycling ammonia distillation waste liquid by soda enterprises using an ammonia-alkali process, in particular to a process and device for applying the ammonia distillation waste liquid to quicklime hydration. The device is characterized in that the other end of a supernatant tube is placed in a cylinder body of an ashing machine and connected to one end of acentral tube; the central tube is fixed to the center of the ashing machine by two sets of supports; the other end of the central tube is located outside a partition board; dustpans are mounted on thepartition board; the other side of the partition board is provided with a sieve body; a cleaning device and a spraying device are mounted on the sieve body; an ashing water pipe and a flushing waterpipe are mounted on an ash inlet elephant trunk; the extended end of the flushing water pipe is placed in the cylinder body. The ammonia distillation waste liquid is subjected to solid-liquid separation, a supernatant is conveyed into the ashing machine, and solid particles are conveyed to the inlet of a waste liquid pump; quicklime is hydrated into high-concentration lime milk; scab on the innerwall of the ashing machine is caused by the poor fluidity of flushing water; after the hydration reaction of the quicklime in the ashing machine is wholly completed, the supernatant is added for dilution to achieve the indexes required for production, the fluidity is increased, and the efficiency of the separation and sieving at the rear end of the ashing machine is improved.

Description

technical field [0001] The invention relates to a method for recycling ammonia distillation waste liquid by soda ash enterprises of ammonia soda method, in particular to a process and a device for using the ammonia distillation waste liquid for quicklime digestion. Background technique [0002] During the production of soda ash by the ammonia-soda method, about 10m of waste liquid is produced per ton of soda 3 Left and right, the main components of the waste liquid are water, calcium chloride, sodium chloride, calcium sulfate, solid particles, etc. Because the ions in the waste liquid are difficult to handle, the general enterprises use direct discharge into the liquid slag field, and the supernatant after clarification The liquid is discharged into the sea or evaporated naturally; some enterprises recycle part of the waste liquid to produce calcium chloride products; some enterprises recycle part of the waste liquid to make desulfurizers, etc., but due to the influence of f...

AI Technical Summary

Problems solved by technology

[0003] The present invention mainly solves key technical problems such as slowing down of lime digestion speed in the actual production of lime digestion of ammonia distillation waste liquid, low concentration of lime milk, scarring on the inner wall of the lime machine, and scabbing and blockage of the screen.

Images