Wet sand oven-dry system

Abstract

The invention relates to the oven-dry field, in particular to a wet sand oven-dry system. The wet sand oven-dry system aims at solving the technical problem that dust is produced before coal enters a furnace in fluid bed in the wet sand oven-dry system. Therefore, the technical scheme is that the wet sand oven-dry system comprises a coal feed hopper, the furnace in fluid bed, a sand feed pipe, a drier, an induced draft fan and an air pumping pipe. A discharge port, an air outlet and a feed port are formed in the drier. The induced draft fan is communicated with the air outlet of the drier. The sand feed pipe is connected with the feed port of the drier. An air inlet and an air outlet are formed in the furnace in fluid bed. Coal of the furnace in fluid bed is sent into the furnace in fluid bed through the coal feed hopper, and the air outlet of the furnace in fluid bed is connected with the feed port of the drier. A first end of the air pumping pipe is arranged inside the furnace in fluid bed, and a second end of the air pumping pipe is connected with the coal feed hopper. Due to the fact that the air pumping pipe is arranged between the coal feed hopper and the furnace in fluid bed, the dust produced during the process that the coal enter the furnace in fluid bed is sent into the furnace in fluid bed through the air pumping pipe, and therefore not only can environment pollution be avoided, but also energy resources are fully and reasonably used.

Description

technical field [0001] The invention relates to the drying field, in particular to a wet sand drying system. Background technique [0002] During the production of dry-mixed mortar, the moisture content of the raw material sand is required to be less than 0.5%. Most of the raw material sand cannot be directly used in the production of dry-mixed mortar because the moisture content is too high. Therefore, the raw material sand needs to be dried before use to make the moisture content Meet the conditions to meet the production requirements of dry-mixed mortar. The wet sand drying system in the existing dry-mixed mortar mixing plant includes a dryer and a fluidized furnace. First, the wet sand is introduced into the dryer, and then the heat generated by the fluidized furnace is introduced into the dryer. The heat generated by the fluidized furnace will enter the dryer. The wet sand of the dryer is dried. The thermal energy in the fluidized fluidized furnace is mostly converted...

AI Technical Summary

Problems solved by technology

However, the heat energy in the fluidized fluidized furnace is mostly converted by coal combustion. Before the coal enters the fluidized fluidized furnace, especially when it is broken, it will produce more dust, which will cause environmental pollution and is not conducive to the use of equipment.

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