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Large manual sandstone factory wastewater treatment process

A technology for artificial sand and waste water treatment, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. Low universality and other problems, to achieve the effect of reducing environmental risks and improving the construction environment

Active Publication Date: 2010-11-24
SINOHYDRO BUREAU 9
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Problems solved by technology

The third method has a good treatment effect and a high water recovery rate, but fine sand cannot be recycled, and it is necessary to find another favorable terrain to build a wastewater reservoir. The cost of engineering construction and land acquisition is high, and it has high requirements on terrain and environment, so it is universal in application. Low

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specific Embodiment approach

[0013] In the wastewater treatment of the large-scale artificial gravel plant of Guanyinyan Hydropower Station, the wastewater generated during the production process of the gravel plant is first collected in a centralized manner, and the wastewater is lifted to the primary treatment structure 2 by a mud booster pump. The primary water treatment structure mainly adopts the mud purification device ZX-250 to recover particles with a particle size of 0.08-5mm in the production wastewater, and the fine sand recovery rate can reach more than 90%. The recovered fine sand is transported by the aggregate conveyor belt conveyor To the finished product sand bin 8; after the production wastewater is settled and recovered by the first-level mud purification device model ZX-250, the overflow wastewater is sent to the vertical flow sedimentation tank 3 (length×width×height=42m×21.2m×11.1m) Carry out secondary precipitation, which mainly removes particles with a particle size of ≤0.08mm in th...

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Abstract

The invention relates to a large manual sandstone factory wastewater treatment process which comprises the following steps of: carrying out three grades of water treatment processes on wastewater generated in the production process; in the first-grade water treatment process, settling and recycling production wastewater by adopting a slurry purifying device; in the second-grade water treatment process, mainly settling stone powder and sludge by adopting a vertical flowing type settling pond; in the third water treatment process, charging a flocculating agent into a water inlet according to the proportion of 1:5,000 by adopting an inclining pipe / plate settling pond so that a suspending matter which is more difficult to settle in water is rapidly settled; carrying out solid-liquid separation on the stone powder and the sludge settled in the second-grade settling pond and the third-grade settling pond by a vacuum filter; and conveying waste slag obtained by recycling wastewater and drying the sludge to a slag disposal field or using the waste slag for second ploughing and embedding. Meanwhile, an emergency pond is built for really achieving the aim of not externally discharging the wastewater under any condition. The invention solves the problem of difficult wastewater treatment of the traditional manual sand preparation, improves the construction environment of engineering, reduces the environmental protection risk and has favorable social and economic benefits.

Description

technical field [0001] The invention relates to the wastewater treatment technology in the production process of artificial gravel plants, in particular to the wastewater treatment process of large artificial gravel plants. Background technique [0002] The wastewater treatment system for artificial sand aggregate processing in the prior art, the discharge index is: meet the bidding requirements of the suspended solids concentration SS<200mg / L or meet the secondary discharge standard in the "Comprehensive Wastewater Discharge Standard" (GB8978-1996) . The artificial sand and gravel plant consumes a lot of water for production, often hundreds of thousands of square meters. The waste water discharge during the production process is large, and the cost of water is high. Since the production water of the artificial sand and gravel plant is mainly used for washing aggregates and fine sand, the suspended solids in the wastewater are mainly fine sand, stone powder and mud. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/02
Inventor 王忠禄徐正铭张昌晶刘江军刘俊
Owner SINOHYDRO BUREAU 9
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