A crushing, screening and dedusting device

Abstract

The invention discloses a crushing, screening and dedusting device, which comprises a dust collecting hood connected to a dust remover through a dust extraction air pipe, water tanks are evenly arranged on one side of the dust remover, and throats are arranged between adjacent water tanks; the top of the water tank Connect the injection pipe, and the top of the injection pipe is equipped with a reflector. The water ejected from the adjacent injection pipe forms a water curtain at the throat under the action of the reflector. There is a sewage valve, and the bottom of the sewage valve is a sedimentation tank; the other side of the dust collector is evenly equipped with 2 to 6 rows of dehydrators, and the dehydrators are connected to the exhaust pipe through a clean air pipe. A centrifugal fan is installed at the bottom of the exhaust pipe, and the centrifugal fan is controlled by a motor. . The device improves the dust collection efficiency of water mist, reduces dust discharge, improves the dust extraction effect, makes the dust concentration of the post less than 2mg / Nm3, meets the national environmental protection standard, prevents dust explosion accidents caused by excessive dust concentration, and reduces the occurrence of silicosis.

Description

technical field [0001] The invention relates to a crushing, screening and dedusting device, which belongs to the technical field of mine dedusting equipment. Background technique [0002] The raw iron ore crushing of Taigang Ekou Iron Mine is a three-stage closed-circuit crushing and screening system, which crushes and screens more than 9 million tons of iron ore every year, and the raw ore with a particle size of 1500mm is crushed and screened in three stages: coarse, medium and fine. Finally, the particle size reaches 0-12mm. During the crushing and screening process, a large amount of dust will be generated, which contains inhalable irreversible silicon dioxide (SiO 2 ), which will seriously affect the health of employees and cause silicosis. Therefore, the dust collector is an important environmental protection equipment for the crushing and screening of iron ore in Ekou, and it is very important to the physical and mental health of workers. The country has higher and ...

AI Technical Summary

Problems solved by technology

The country has higher and higher requirements for environmental protection of factory posts, from the past 50mg / Nm 3 , increase the current 2mg / Nm 3 ; The dust removal effect of traditional old-fashioned (impact) dust collectors is poor, and the dust concentration at the post reaches 145-345mg / Nm 3 , low efficiency, exceeding the national standard 2mg / Nm 3 More than 20 times the standard, because iron ore dust contains silicon dioxide (SiO 2 ), the particle size is very fine, and after inhalation, the employees will adhere to the lung cells and make them lose their elasticity, which will easily cause silicosis (elastic lungs become stone lungs, and the lung function is lost), and it is irreversible; the dust in the workplace is large, resulting in more silicosis at the workplace There are more and more, and there is an upward trend every year; the first old dust collector is an impact dust collector, and the water level of the water tank cannot be controlled. If the water level is adjusted to be low, the dust collector will directly discharge dust, resulting in fast wear of the fan impeller and high dust concentration in the environment; if adjusted The water surface is high, the dust removal resistance is large, and the dust extraction effect is not good; the second traditional dust removal system first extracts dust and then removes dust through the pool, and the fan impeller wears quickly when the dusty airflow passes through the impeller; the third traditional dust collector The height of the water pool is 50-70mm , it is difficult to control; fourth, the traditional dust collector does not have a dehydration device and a secondary dust removal device, and it is easy to freeze the inner wall of the pipe in winter, resulting in a smaller inner diameter of the pipe, reducing the dust removal effect and increasing the load of the dust collector

[0003] The defects of the original dust collector are reflected in: during the use of the traditional dust collector, there are many faults, short life, and large dust at the post, resulting in poor environment for the workers at the post, and technical problems such as large machine vibration and heavy load caused by the freezing of the inner wall of the pipeline in winter; the original The fatal shortcomings of the water tank sedimentation dust collector are: the water level cannot be adjusted, the fan impeller wears quickly, the workers clean up a lot, and there are many faults, the service life is short, the structure is complex, the dust removal effect is poor, and the dust concentration at the post is high, reaching 145-345mg / Nm 3 , workers are susceptible to pneumoconiosis

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