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Hydraulic fractional separation and fine sand recovery method for gravel production wastewater treatment

A production wastewater and fractional separation technology, applied in water treatment parameter control, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of unstable recovery, poor recovery effect of fine sand, poor flexibility, etc. , to achieve the effect of improving the effect of sludge sedimentation and separation, improving the efficiency of fine sand recovery and sludge sedimentation and separation, and reducing operating costs

Pending Publication Date: 2021-02-19
SINOHYDRO BUREAU 9
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Problems solved by technology

[0004] However, this wastewater treatment process has the disadvantages of poor recovery of fine sand, unstable recovery, and poor flexibility.

Method used

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  • Hydraulic fractional separation and fine sand recovery method for gravel production wastewater treatment
  • Hydraulic fractional separation and fine sand recovery method for gravel production wastewater treatment

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Embodiment Construction

[0029] The technical solution of the present invention is further described below, but the scope of protection is not limited to the description.

[0030] Such as figure 1 and figure 2 As shown, a method for hydraulic fractionation and fine sand recovery of sandstone production wastewater treatment according to the present invention comprises the following steps:

[0031] (1) Hydraulic separation of fine sand: After preliminary sedimentation in the advection tank, the waste water from sand and gravel production flows through several stages of hydraulic separation tanks in sequence. According to the separation effect of fine sand precipitation, the flow of wastewater entering the separation tank is controlled by PLC. Adjust the flow rate of the wastewater in the separation tank to adjust the ability of the wastewater to carry fine sand, so that the fine sand can be precipitated and separated in the separation tanks of the previous hydraulic separation tank group;

[0032] (2...

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Abstract

The invention discloses a hydraulic fractional separation and fine sand recovery method for gravel production wastewater treatment, and belongs to the technical field of gravel production wastewater treatment. The method comprises the following steps: (1) conducting fine sand hydraulic separation; (2) judging whether fine sand is recycled or not; and (3) conducting sludge hydraulic separation. ThePLC can automatically adjust the precipitation path according to the precipitation separation effect of fine sand and sludge, change the number of stages participating in wastewater treatment in thehydraulic separation tank group and the number of separation tanks participating in wastewater treatment in each stage of hydraulic separation tank group, control the opening and closing degree of opened valves, reduce the flow of wastewater entering related separation tanks, further reduce the flow velocity of the wastewater in the separation tanks, reduce the capacity of the wastewater for carrying fine sand or sludge, improve the fine sand precipitation recovery effect, improve the sludge precipitation separation effect, and reduce sludge discharge, and good flexibility and stability are achieved. Clear water obtained after wastewater treatment can be used for gravel production again, water resources are saved, and the purposes of energy conservation and environmental protection of green mines are achieved.

Description

technical field [0001] The invention relates to a hydraulic fractionation and fine sand recovery method for sandstone production wastewater treatment, and belongs to the technical field of sandstone production wastewater treatment. Background technique [0002] In the production process of the artificial sand and gravel processing system, in order to ensure that the quality of the finished aggregate meets the requirements, it is necessary to wash the aggregate with water. Often a medium-sized sand and gravel processing system consumes a lot of water and the cost of water is high. Sand and gravel processing production wastewater generally does not contain toxic and harmful substances, and has little effect on acid and alkali of water quality. Its main feature is high content of suspended solids. The concentration of suspended solids (SS) is 50,000-160,000 mg / L, which belongs to high-concentration wastewater. In the treatment and recovery process of waste water from machine-ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
CPCC02F9/00C02F2209/005C02F2001/007C02F1/52
Inventor 王军严章国覃信海张昌晶武绍元杨胜军邓飞张延钱永亮计春朱利群
Owner SINOHYDRO BUREAU 9
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