A large dry heavy medium fluidized bed sorter and sorting system

Abstract

The invention discloses a large dry dense medium fluidized bed separation machine and a separation system. The separation machine mainly comprises a separation machine bed body, an air distribution device, a float discharge device, a sediment discharge device, a quick dense medium circulating device and the like. The separation system comprises a raw material feeding system, the large dry dense medium fluidized bed separation machine, a medium purifying and recycling system, an air supply system, a dust removal system, a control system and the like. The air supply system is mainly provided with a roots blower, a pressure stabilization air storage tank and the like. The raw material feeding system comprises a raw material bin and a feeder. The medium purifying and recycling system mainly comprises a sculping screen, a medium scraper conveyer, a medium bucket elevator, a circulating medium bin, a magnetic separator, a magnetic material bin and the like. The dust removal system mainly comprises an induced draft fan, a dust remover, an air compressor and the like. The separation machine is large in handling amount, high in separation precision, small in medium circulating amount, reliable in running and easy to maintain. The separation system is reasonable in layout, compact in structure, large in handling capacity, good in separation effect and low in capital construction and running cost.

Description

technical field [0001] The invention relates to a large-scale dry-process heavy-medium fluidized bed sorter and a sorting system, belonging to the dry-process sorting technology. Background technique [0002] Coal has always been an important primary energy source in the world. Since coal is an unclean energy source, if it is directly used, it will cause serious environmental pollution and waste of resources. Therefore, coal needs to be sorted and processed. At present, in the field of coal preparation, wet coal preparation plays a leading role in the world. However, wet coal preparation needs a lot of water in the separation process, but the shortage of water resources and water shortage have become an indisputable fact in the world. Wet coal preparation is restricted, while dry separation technology in anhydrous environment has been paid more and more attention by various countries. [0003] At present, dry coal preparation technologies mainly include air heavy medium fl...

AI Technical Summary

Problems solved by technology

[0004] In the existing dry heavy medium fluidized bed separator, the floating and sinking objects after separation are mostly discharged by the same set of scraper discharge device. The material speed is limited by the amount of floating and sinking objects. In order to adapt to different selected materials, the feeding amount needs to be changed, and the processing capacity of the sorter is affected. The processing capacity is generally 40-60t / h, and it is difficult to increase the processing capacity. Limit the large-scale coal preparation equipment

In addition, when the amount of floating objects is large, the dynamic stock of floating objects in the sorter increases, and the particles are squeezed together to form a plate. Some particles with relatively high density are on this plate and cannot be effectively separated. The ash content of floating objects is high, and the sorting accuracy is poor

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