A coal washing circulating water utilization system

Abstract

The present invention relates to a water circulation system, in particular to a coal washing circulating water utilization system, which includes a buffer tank for receiving flotation tailings, a sedimentation tank connected with the buffer tank, and a pool for collecting detached water. The upper water in the sedimentation tank can overflow into the pool, and a water delivery pipe is connected between the pool and the joint cylinder, and a submersible pump is installed in the pool, and the output end of the submersible pump is connected to the delivery tube. The water pipes are connected, and a water level gauge is installed inside the joint tube, and an alarm is installed outside, and an electromagnetic valve for controlling water flow is installed on the end of the water delivery pipe close to the joint tube. The invention has the advantage that the water in the coal washing process can be recycled, avoiding the waste of water resources and reducing the processing cost.

Description

technical field [0001] The invention relates to a water circulation system, in particular to a coal washing circulation water utilization system. Background technique [0002] Coal washing is an indispensable process of coal deep processing. The coal directly mined from the mine is called raw coal. Raw coal is mixed with many impurities during the mining process, and the quality of coal is also different. Coal with small internal ash and large internal ash is mixed in Together. Coal washing is an industrial process that removes impurities in raw coal, or classifies high-quality coal and low-quality coal. [0003] refer to figure 1 , the main steps of coal washing are: screen the raw coal through the first screener 1, so that the raw coal with a particle size larger than the set value enters the crusher 11 for crushing, and the crushed raw coal and the raw coal with a particle size smaller than the set value enter the dense medium together. The cyclone 12 separates the cle...

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Problems solved by technology

[0003] refer to figure 1 , the main steps of coal washing are: screen the raw coal through the first screener 1, so that the raw coal with a particle size larger than the set value enters the crusher 11 for crushing, and the crushed raw coal and the raw coal with a particle size smaller than the set value enter the dense medium together. The cyclone 12 separates the clean coal mixed with the coal washing medium and the gangue mixed with the coal washing medium through the dense medium cyclone 12, and then removes the medium through the medium removal screen 13 to obtain the water-containing coal after the separation. clean coal and water-containing gangue, and recover the qualified medium to the combined media cylinder 14 at the same time. Carry out dehydration treatment 15 with water-containing gangue to obtain clean coal and gangue, the clean coal is directly output, and the gangue enters the next process (not shown in the figure), wherein the liquid detached from the water-containing clean coal will enter the flotation device 16 for flotation processing, sorting out the flotation tailings, after dehydration, the flotation tailings directly enter the sedimentation tank 17 for sedimentation, and then squeeze and output the coal slime through the filter press 18, and the water in the whole dehydration and deintermediation process will be Directly discharged, resulting in a waste of water resources; at the same time, because the flotation tailings are directly passed into the sedimentation tank, when the water level is higher than the sedimentation tank, the water will overflow, and a small amount of flotation tailings will be carried during the overflow process. Mine discharge, causing great waste

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