Grinding wastewater reuse and silica powder recovery device with tubular micro-filtration membrane assembly

Abstract

The invention provides a grinding wastewater reuse and silica powder recovery device with a tubular micro-filtration membrane assembly. The device comprises a raw water tank, the tubular micro-filtration membrane assembly, a first delivery pipe, a circulating pump, a water production tank, a second delivery pipe, a silica mud recovery device, a third delivery pipe, a mud delivery pump, a fourth delivery pipeline, a back washing pump and an automatic control system, wherein the raw water tank is used for containing wastewater; the first delivery pipe is used for communicating the raw water tank with the tubular micro-filtration membrane assembly; the circulating pump is arranged on the first delivery pipe; the second delivery pipe is used for communicating the tubular micro-filtration membrane assembly with the water production tank; the third delivery pipe is used for communicating the lower end of the raw water tank with a pressure filter; the mud delivery pump is arranged on the third delivery pipe; the fourth delivery pipeline is communicated with the water production tank; and the back washing pump is arranged on the fourth delivery pipeline. According to the grinding wastewater reuse and silica powder recovery devic, the wastewater enters the tubular micro-filtration membrane assembly under the action of the circulating pump, is purified and enters the water production tank through the tubular micro-filtration membrane assembly after being purified, generated concentrated water flows back to the raw water tank, and the purified water enters the tubular micro-filtration membrane assembly and is subjected to back washing, and particles in the raw water tank enter the silica mud recovery device, are dehydrated to form mud cakes and are discharged. The grinding wastewater reuse and silica powder recovery device with the tubular micro-filtration membrane assembly has a good pollution cleaning effect and high efficiency.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a device for recycling grinding wastewater and recovering silicon powder with a tubular microfiltration membrane module. Background technique [0002] At present, the waste water generated during wafer thinning, crystal back grinding and wafer cutting in electronics factories (hereinafter referred to as "grinding wastewater") contains tiny silicon shavings and deionized water. Tiny silicon shavings still float in the water after being discharged into the water, making the water dark brown, which not only cannot be reused, but also directly affects the landscape of the factory. Therefore, as long as the silicon chips and deionized water can be separated, the produced water can be reused, and the silicon powder can also be separated, and then used in suitable production to realize resource-based production. In today's society, water has become a commodity in short supply a...

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Problems solved by technology

[0005] Aiming at the disadvantages of the prior art, such as the hollow fiber membrane filter module is easy to block, needs frequent flushing, low water production rate, and high energy consumption; the tubular ultrafiltration membrane cannot be backwashed, etc., the present invention provides a Grinding wastewater reuse and silicon powder recovery device for microfiltration membrane modules

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