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Treatment method and device for high-concentration suspended matter waste water

A treatment method and technology of a treatment device are applied in the treatment of high-concentration suspended solids wastewater and the field of high-concentration suspended solids wastewater treatment devices, which can solve the problem of no solid-liquid separation solution, small recovery of pretreated stone powder, and sand and gravel wastewater. The problem of high concentration can achieve obvious effect of precipitation and concentration, reduce the load of wastewater treatment, and achieve the effect of fast sedimentation.

Active Publication Date: 2016-05-25
CHANGJIANG SURVEY PLANNING DESIGN & RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(3) It is currently a commonly used process for wastewater treatment in sand and gravel systems, but there are problems such as small recovery of pretreated stone powder, easy silting of the system, hardening of mud at the bottom of radial flow tanks, high moisture content of mud cakes, and unsmooth operation.
And the concentration of gravel wastewater is high and the particles are fine, D 50 It will be below 10 μm, and there is no effective solution for solid-liquid separation

Method used

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  • Treatment method and device for high-concentration suspended matter waste water
  • Treatment method and device for high-concentration suspended matter waste water
  • Treatment method and device for high-concentration suspended matter waste water

Examples

Experimental program
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Effect test

Embodiment 1

[0056] The treatment method of high-concentration suspended matter wastewater comprises the following steps:

[0057] 1) High-concentration suspended solids wastewater is discharged from the waste water collection channel 1 into the first sump 2, and then sent to the primary hydrocyclone 4 through the first water pump 3, and the high-concentration suspended solids wastewater is treated by the primary hydrocyclone 4 Finally, the sediment and overflow liquid are obtained, and the sediment obtained after being treated by the first-level hydrocyclone 4 is sent to the first strong dehydration equipment 5, and the first-level hydrocyclone 4 combined with the first strong dehydration equipment 5 can remove ≥0.038 mm particles can be reused as stone powder to reduce the load of waste residue treatment at the back end and protect equipment and filter cloth from wear and tear. The moisture content of stone powder dehydrated by the first powerful dehydration equipment 5 can be reduced to ...

Embodiment 2

[0064] The treatment method of high-concentration suspended matter wastewater is as in Example 1, wherein the flocculant is a mixture of PAM and CaO in a weight ratio of 1:15.

[0065] The sedimentation recovery rate of the secondary hydrocyclone reaches 47.8%, the particle settling speed of the radial flow sedimentation tank reaches 0.33mm / s, the solid content of the bottom sedimentation mud increases to 37%, the sedimentation and concentration effect is obvious, the effluent water quality is stable and meets the standard, and the high-efficiency diaphragm pressure The working cycle of the filter is stable at 45min to 50min, and the moisture content of the mud cake after pressing is 11%, which meets the conditions for cleaning and transportation, and greatly reduces the volume occupied by the mud cake.

Embodiment 3

[0067] The treatment method of high-concentration suspended matter wastewater is as in Example 1, wherein the flocculant is a mixture of PAM and CaO in a weight ratio of 1:60.

[0068] The sedimentation recovery rate of the secondary hydrocyclone reaches 46.4%, the particle settling speed of the radial flow sedimentation tank reaches 0.31mm / s, the solid content rate of the sedimentation mud at the bottom increases to 36%, the sedimentation and concentration effect is obvious, the effluent water quality is stable and meets the standard, and the high-efficiency diaphragm pressure The working cycle of the filter is stable at 45min to 50min, and the moisture content of the mud cake after pressing is 14%, which meets the conditions for cleaning and transportation, and greatly reduces the volume occupied by the mud cake.

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Abstract

The invention discloses a treatment method for high-concentration suspended matter waste water. The treatment method comprises the following steps that 1, a multi-stage hydrocyclone is utilized for separating the waste water containing high-concentration suspended matter to obtain deposition and overflow liquid, and the deposition is recovered; 2, deposited slurry is concentrated, wherein the overflow liquid obtained in the step 1 is guided into a radial-flow sedimentation tank, a flocculating agent is introduced into an accessory adding pipe of the overflow liquid and the radial-flow sedimentation tank in a multi-point adding mode to obtain the deposited slurry and supernatant water, and the supernatant water is recovered; 3, the deposited slurry is dehydrated, wherein the deposited slurry obtained in the step 2 is subjected to filter pressing and drum film secondary extruding dehydrating, meanwhile, air entering and flow penetrating are carried out, and filter residues in a whole filter chamber are purged in a full-flow and high-pressure mode. The invention further discloses a device for using the treatment method for the high-concentration suspended matter waste water. Solid and liquid can be separated fast, the deposited slurry is dehydrated fast, the high-concentration suspended matter waste water can meet the standard or can be recovered for production, the water content of mud cakes is low, and the requirement for clean transportation is met.

Description

technical field [0001] The invention relates to a process for treating waste water discharged from sandstone concrete production systems of large and medium-sized water conservancy and hydropower projects, in particular to a treatment method for high-concentration suspended matter wastewater, and also relates to a treatment device for such high-concentration suspended matter waste water. Background technique [0002] In order to ensure the quality of concrete construction in water conservancy and hydropower projects, the sand and gravel production system often adopts wet production. The mud content and powder coating degree of artificial sand and gravel aggregates are controlled within the allowable range by washing with clean water, which will generate a large amount of waste water, and its total suspended The solid concentration (TSS) is generally as high as 30-120kg / m 3 Above, the TSS in the gravel production system of large-scale water conservancy and hydropower projects...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F11/12
CPCC02F1/38C02F1/5236C02F1/56C02F11/12C02F11/122C02F2301/08
Inventor 陈雯龙慧文张志胜车公义袁建伟彭伟光温革黄明海黄毅张骏徐翔
Owner CHANGJIANG SURVEY PLANNING DESIGN & RES
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