Upflow anti-blocking method and device for dense medium shallow tank separator

Abstract

The invention discloses an upwelling anti-blocking method for a heavy-medium shallow slot sorting machine. A flow distribution plate is arranged on an upwelling hopper of the heavy-medium shallow slot sorting machine. The flow distribution plate is provided with upwelling distribution holes, and the aperture ratio of the flow distribution plate can be increased by adjusting the arrangement mode of the upwelling distribution holes and the hole interval in the direction of coal flow and gangue flow. Meanwhile, the total cross sectional area ratio of upwelling pipes and horizontal flow pipes of various models is controlled to ensure that upwelling and horizontal flow are in proper proportion, and therefore under the premise of normal sorting of the heavy-medium shallow slot sorting machine, the pipe diameter of each upwelling pipe is increased, the upwelling in the sorting process of the heavy-medium shallow slot sorting machine is also increased, heavy-medium suspension liquid in the heavy-medium shallow slot sorting machine is made stable, and the upwelling distribution holes and pipes can be prevented from being blocked. According to the method, by changing the shape of each flow distribution hole, the particle size lower limit of lump coal effectively separated by the heavy-medium shallow slot sorting machine can be lowered to 6mm from +13mm under the condition that the upwelling holes and pipes are effectively prevented from being blocked, and due to lowering of the separation lower limit of the heavy-medium shallow slot sorting machine, pressure of a fine cleaned coal separation system can be relieved to a great extent.

Description

technical field [0001] The invention relates to a lump coal washing method and equipment device, in particular to an upflow anti-blocking method and device of a dense medium shallow tank separator, which is mainly used for the important lump coal washing of heavy medium coal preparation, and belongs to block Coal washing technology field. Background technique [0002] The dense medium shallow tank separator has become an important lump coal washing equipment for dense medium coal preparation due to its high separation precision, large processing capacity and low production cost. When the incoming lump coal is fed into the sorting tank, it is completely immersed in the suspension under the action of the regulating baffle. At this point, layering begins. Low-density matter such as clean coal floats on the upper layer, and high-density matter such as gangue sinks to the bottom of the tank body. During the sinking process, the low-density matter mixed with gangue will continu...

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Problems solved by technology

[0010] The purpose of the present invention is to propose a method and device that can effectively avoid the clogging of the upflow distribution plate holes and pipelines in view of the existing dense medium shallow tank sorting method or device that the holes of the upflow distribution plate and the pipes are often blocked. The method and device for avoiding the clogging of flow plate holes and pipelines in the furnace can effectively eliminate the clogging caused by unstable fluids with characteristics such as adhesion, deposition and scaling in heavy medium suspensions, and the structure is simple and the operation cost is low

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