Hydraulic system used for recycling emulsified liquid of coal face

Abstract

The invention discloses a hydraulic system used for recycling emulsified liquid of a coal face. The hydraulic system comprises hydraulic control units. Each hydraulic control unit comprises a hydraulic stand column, a hydraulic jack reversible lock, hydraulic equipment and a hydraulic control valve set used for controlling the hydraulic stand column, the hydraulic jack reversible lock and the hydraulic equipment, wherein a back flush emulsified liquid inlet of the hydraulic control valve set is communicated with an outlet of a back flush filter; a liquid drain outlet of the back flush filter is communicated with a liquid return pipeline through a pipeline; an inlet of the back flush filter is communicated with a high-pressure liquid inlet pipeline through a stop valve; the liquid return pipeline is communicated with an inlet of an emulsified liquid pump box through a liquid return filter; an outlet of the emulsified liquid pump box is communicated with the high-pressure liquid inlet pipeline through an emulsified liquid pump station; a back flush emulsified liquid return port of the hydraulic control valve set is communicated with the liquid return pipeline through a break valve; a diversion interface of a stand column safety valve of the hydraulic stand column and a diversion interface of a jack safety valve of the hydraulic jack reversible lock are communicated with the liquid return pipeline through pipelines.

Description

technical field [0001] The invention relates to an emulsion recovery system, in particular to a hydraulic system for recovering emulsion in a coal mining face. Background technique [0002] The hydraulic support in the mechanized coal mining face is generally equipped with a backwash filter (manual or electromagnetic pilot backwash). Flush the filtered impurities in the filter element to improve the service life of the backwash filter element, and the emulsion after backwashing is discharged into the goaf of the working face in large quantities through the backwashing sewage pipe. At the same time, when the hydraulic support works normally, the safety valve configured on the hydraulic support column and the jack matched with the hydraulic support will unload the pressure and discharge the emulsion when the rated pressure is reached, and the emulsion also flows into the working surface. The above two ways of discharging the emulsion all cause a lot of waste of the emulsion. ...

AI Technical Summary

Problems solved by technology

Both of the above two ways of discharging the emulsion have caused a lot of waste of emulsion

Moreover, the chemical additives contained in the emulsion also lead to the pollution of groundwater and the environment

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