Crystal back grinding water, diamond wire slicing water and sludge recycling system

Abstract

The invention discloses a crystal back grinding water, diamond wire slicing water and sludge recycling system, and relates to the field of semiconductor factory and photovoltaic factory processing. The system comprises a pipeline system, a waste liquid tank, a filter and a clear liquid tank are sequentially arranged on the pipeline system in the liquid flowing direction, and a filter pump and a clear liquid pump are arranged on the pipeline system, wherein a filter assembly, a pre-filtering assembly, a liquid discharging assembly, a filter cloth cleaning assembly, a pressure relief assembly, afilter cake blow-drying assembly and a filter cake discharging assembly are arranged on the pipeline system, and the system further comprises a PLC control assembly. In the invention, the filter is used for processing the liquid waste to achieve solid-liquid separation, and the purified liquid is recycled as secondary water. The water consumption of tap water of companies is reduced, the discharge amount of wastewater is reduced, the wastewater treatment cost is reduced, solid (silicon powder) obtained by filtration and recovery is used as a ferrosilicon production raw material for reuse, theoriginal sludge outsourcing treatment cost is reduced, and the sludge treatment cost is saved.

Description

technical field [0001] The invention relates to the processing field of a semiconductor factory and a photovoltaic factory, in particular to a crystal back grinding water, a diamond wire slicing water and a sludge recovery and reuse system. Background technique [0002] The semiconductor crystal back grinding waste liquid, the chamfering square grinding waste liquid in the photovoltaic plant, and the slicing mortar waste liquid are currently chemically coagulated, filtered through a filter press, water is discharged, and silicon powder sludge is used as waste. Because the sludge has undergone chemical coagulation, the sludge cannot be used as a raw material for ferrosilicon, which is a waste of resources and high cost. Contents of the invention [0003] The technical problem solved by the present invention is to provide a crystal back grinding water and diamond wire slicing water that can separate the waste liquid into solid and liquid, so that clean liquid and solid (sili...

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Problems solved by technology

[0002] The semiconductor crystal back grinding waste liquid, the chamfering square grinding waste liquid in the photovoltaic plant, and the slicing mortar waste liquid are currently chemically coagulated, filtered through a filter press, water is discharged, and silicon powder sludge is used as waste. Because the sludge has undergone chemical coagulation, the sludge cannot be used as a raw material for ferrosilicon, which wastes resources and costs high

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