Four-stage dry-wet double dust removal environment-friendly lime slaking device

Abstract

The invention discloses a four-stage dry-wet double-dedusting environment-friendly lime slaking device, and belongs to the technical field of lime slaking. The device comprises a first-stage propelling water adding bin, a second-stage propelling water supplementing bin, a third-stage propelling slaking bin and a four-stage propelling reaction bin; materials are pushed into the second-stage propelling water replenishing bin through double spiral blades on the inner side of the first-stage propelling water adding bin, the second-stage propelling water replenishing bin replenishes water through a water replenishing pipeline on the outer side, and the materials are pushed into the third-stage propelling digestion bin through spiral blades on the inner side of the second-stage propelling water replenishing bin; a stirring shaft and blades on the inner side of the third-stage propelling digestion bin are used for uniformly stirring materials and conveying the materials into the fourth-stage propelling reaction bin; and the space on the inner side of the fourth-stage propelling reaction bin is larger than that of the third-stage propelling digestion bin. The four-stage dry-wet double-dust-removal environment-friendly lime slaking device solves the problems that a three-stage slaking device and a double-shaft humidifier cannot meet the digestibility and dust removal cannot reach the standard.

Description

technical field [0001] The invention belongs to the technical field of lime digestion, and in particular relates to a four-stage dry-wet double dust-removing environment-friendly lime digestion device. Background technique [0002] As we all know, quicklime is an important part of sintering batching flux, and its main function is to improve the pelletizing effect of sintering iron-containing mixture and adjust the alkalinity of sintering ore. The more thoroughly the quicklime added to the mixture is digested before mixing, the better the pelletizing effect, so in the previous design, the batching room was equipped with quicklime digestion and dust removal facilities, because the quicklime digestion process is an exothermic chemical process. reaction, the heat generated during the digestion process carries a large amount of dust and causes serious pollution to the batching room and along the transportation. Due to the pressure of environmental protection, the digestion of qu...

AI Technical Summary

Problems solved by technology

[0003] According to the survey, the digestion of raw ash in the batching room of the existing sintering machine adopts water digestion in a mixer, because the residence time of the sintered mixture in the mixer is 5-8 minutes, compared with the 15-18 minutes required for quicklime digestion (compared with quicklime) activity, the composition of iron-containing mixtures are all related), the time is far from enough

Secondly, the undigested quicklime continues to be digested in the belt conveyor and equipment along the way, resulting in bursting and affecting the pelletizing of the mixer, the bonding of the inner and outer walls of the equipment, and the generation of steam mixed with dust, etc., affecting the site environment, equipment failure, sinter quality, and output. Impact and other issues

[0004] Other iron and steel enterprises use the old-fashioned lime digester, that is, the double-shaft screw humidifier, so that the quicklime can also be digested, and the first mixer is conducive to pelletizing and increasing the temperature of the material, but there are many problems: such as falling into the belt in a short time after adding water , continue to digest on the belt, the entire belt corridor is full of dust and steam, workers cannot work normally, resulting in corrosion of other operating equipment and serious environmental pollution on site; secondly, the biaxial screw is often stuck due to insufficient water addition, and a large amount of water is needed to run down the conveyor belt. The material becomes muddy, which causes a serious waste of water resources; the third is to add dust removal equipment to the belt, and the pipes will be stuck in a short period of time. It is necessary to clean the pipes every once in a while, which wastes energy and material resources, and the dust collector bag also needs to be cleaned. Frequent replacement is not conducive to production and workers' health

Images