Coal slime dehydration drying equipment and method

Abstract

The invention discloses a coal slime dehydration and drying equipment and method, which includes a drying room and a coal slime conveying device, a hot air fan and a negative pressure fan located in the drying room. The coal slime conveying device includes a plurality of coal slime conveying devices from top to bottom. The conveyor belt is arranged in a zigzag shape. There is a vibrating feeder above the slime inlet end of the uppermost conveyor belt of the coal slime conveying device. There is a feed sealing door on the top of the drying room; There is a discharging funnel below the slime outlet end of the conveyor belt at the bottom of the conveyor belt. There is a discharging sealing door at the bottom of the drying room. There is a negative pressure fan and a hot air ventilation air gate at the upper part of the drying room. The lower part of the drying room is equipped with a hot air fan, hot water inlet and outlet, etc., and the upper side wall of the drying room is equipped with a hot air ventilation airlock door, which also includes a slime dehydration and drying method applied to the above equipment. The invention has the beneficial effects of energy saving, environmental protection, high efficiency, low drying temperature, fast speed, high efficiency, simple structure and small floor space.

Description

technical field [0001] The invention relates to the field of coal slime drying, in particular to a coal slime dehydration drying equipment and method. Background technique [0002] At present, the water content of the filtered coal slime on the production line is about 22%; the traditional coal slime drying is to blow the coal slime with 800-degree hot air to dehydrate it. This high-temperature hot air slime drying method has been used for decades The problem with dry technology is that dust and harmful gases are difficult to meet environmental protection standards. [0003] According to the laws of thermodynamics, the heat of vaporization of water decreases with the increase of temperature. The specific heat capacity of water is much greater than that of solids, so increasing the water temperature to reduce the heat of vaporization to vaporize water is not worth the candle. [0004] For example: the heat of vaporization of water is 2366.4KJ / kg, 2295.2KJ / kg and 2258.4KJ / kg...

AI Technical Summary

Problems solved by technology

[0002] At present, the water content of the filtered coal slime on the production line is about 22%; the traditional coal slime drying is to blow the coal slime with 800-degree hot air to dehydrate it. This high-temperature hot air slime drying method has been used for decades The problem with dry technology is that dust and harmful gases are difficult to meet environmental protection standards

But for slime dehydration, the dehydration efficiency is limited only by 55 degree hot air

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