A kind of impurity removal device, drying bed and impurity removal method

Abstract

The invention provides an impurity removing device, a drying bed and an impurity removing method. The impurity removing device comprises a power unit and an impurity removing push plate connected with the power unit. The power unit is used for making the impurity removing push plate do intermittent reciprocating motion, and a collecting device is arranged below the impurity removing push plate. The impurity removing device is applied to the drying bed, the principle that raw materials and impurities can be layered under the jet flow action of the same empty tower gas velocity due to different specific gravities is adopted, the device capable of removing most of impurities in dreg raw materials or similar raw materials in real time under the non-stop condition is provided, and accordingly the comprehensive operation efficiency of the raw materials in the process of using a through flow type dryer can be improved.

Description

technical field [0001] The invention relates to the field of material removal, in particular to a device for removing impurities, a drying bed and a method for removing impurities, and more specifically to the real-time removal of impurities during the operation of a through-flow dryer with a sieve plate. Automatic removal of impurities during continuous drying of large batches. Background technique [0002] When raw materials are dried and processed by through-flow drying equipment, they generally have high water content (45-60%), high viscosity, poor fluidity, and many debris (mud, stone, bamboo chips, plastic bags, etc.) , New sundries will also be mixed in the transportation and turnover link, and these sundries directly affect the use of raw materials. Taking distiller's grains as an example, the stones in the cellar, the mud and plastic film used to seal the cellar are easily mixed into the distiller's grains, and the mixing of new debris during storage and transporta...

AI Technical Summary

Problems solved by technology

In the process of preparing dried products of various raw materials, before entering the dryer, part of the sundries are screened out by a special double-layer drum screen in the raw material conveying link, but only sundries with a particle size of more than 1.5cm can be screened out. The debris with a particle size below 1.5cm enters the dryer together with the raw materials for drying. During the drying process, the raw materials are boiled and fluidized under the action of hot air flow and dehydrated. The specific gravity of the sundries such as stones is higher than that of normal raw materials. Under the normal designed superficial air velocity of the dryer, it is difficult to float in the hot air like raw materials, but it is shown as turning and jumping on the bed plate. As the drying process continues, debris accumulates on the bed plate and covers the sieve plate , affecting the boiling fluidized dehydration of normal raw materials, which deteriorates the normal drying environment and delays production. After drying and discharging, stop the machine completely, arrange workers to enter the dryer to manually remove the backlog of debris, and then start production normally after cleaning, and so on

Low production efficiency, high energy and labor costs during operation, and at the same time, some sundries enter the next section with the dried feed raw materials, such as the crushing section, which will increase the failure rate of crushing and transportation equipment and the damage of wearing parts. consume

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