Multilevel circulating cleaning equipment for solar cell silicon wafers

Abstract

The invention relates to multilevel circulating cleaning equipment for solar cell silicon wafers, which comprises a first rinse tank, a transition rinse tank, a final rinse tank, a water inlet valve, a filter treating pond, a circulating pump, partition embankments and a sewage sump. The partition embankment is arranged in each rinse tank; each rinse tank is divided into a cleaning room and a sewage overflowing room; cleanout fluid overflowed from a rear-way rinse tank is pumped by the circulating pump and is used as cleanout fluid of a front-way rinse tank; sewage overflowed from the outside of the upper surface of each rinse tank flows into the filter treating pond through a flexible pipe for secondary treatment; and the treated cleanout fluid is conveyed to the first rinse tank through the circulating pump and is used as cleanout fluid of the first rinse tank. The actual use of an applicant proves that by the adoption of the multilevel circulating cleaning equipment for the solar cell silicon wafers, the water consumption of cleaning the silicon wafers per ton is only 3 tons, and compared with the conventional cleaning machine, the multilevel circulating cleaning equipment saves water by over 5 tons; and thus the multilevel circulating cleaning equipment has obvious water-saving effect and avoids water resource waste caused by independent water service of the rinse tanks.

Description

Technical field: [0001] The invention relates to solar cell silicon chip cleaning equipment. Background technique: [0002] Silicon wafers for solar cells must be cleaned in multiple stages after cutting to remove the mortar attached to the surface of the silicon wafers. The cleaning equipment currently used is a multi-stage tank cleaning machine, which usually contains more than three cleaning tanks. The silicon wafers to be cleaned are cleaned step by step from the first cleaning tank and then removed. The impurities attached to the surface of the silicon wafer are the most in the first cleaning tank. , which will be gradually reduced in the future. In the existing multi-level cleaning tank structure, each level of cleaning tank has an independent water inlet and outlet system, and each level has wastewater discharged. The sewage discharged from the cleaning tanks at each level is directly discharged, and the consumption required for cleaning silicon wafers The amount of...

AI Technical Summary

Problems solved by technology

In the existing multi-level cleaning tank structure, each level of cleaning tank has an independent water inlet and outlet system, and each level has wastewater discharged. The sewage discharged from the cleaning tanks at each level is directly discharged, and the consumption required for cleaning silicon wafers The amount of water is very large, which not only consumes a lot of water, but also pollutes the environment. Photovoltaic companies urgently need a silicon wafer cleaning equipment that can recycle the cleaning fluid.

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