Method and device for quickly recycling heavy metal wastewater

A heavy metal and resource-based technology, applied in chemical instruments and methods, water pollutants, water/sewage multi-stage treatment, etc., can solve the problems of low recycling value, harsh operating environment, low treatment efficiency, etc. Value, wide treatment range, high removal rate

Pending Publication Date: 2019-06-28
云南恒碧环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the chemical coagulation sedimentation method is a commonly used method for metal wastewater treatment at home and abroad. This process uses lime as a neutralizing agent, which produces a large amount of sludge. The amount of slag to be processed in the follow-up is large, and it is easy to generate hazardous solid waste. The on-site operating environment is relatively harsh.
And due to the use of natural sedimentation, the flocculation and sedimentation time is long, requiring a large sedimentation tank, the treatment system occupies a large area, the treatment efficiency is low, and the effluent is unstable
The

Method used

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  • Method and device for quickly recycling heavy metal wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The method for rapidly reusing heavy metal wastewater comprises the following steps:

[0031] S1: The heavy metal-containing waste water is passed through the grid well 16 to remove the internal and suspended impurities, and is introduced into the pipeline mixer 1 through the pipeline;

[0032] S2: Use vulcanization technology to mix the heavy metal-containing wastewater and the pH regulator in the pipeline mixer 1, adjust the pH to 6, and then enter the mixing reaction tank 2 and add Na at the same time 2 S carries out mixing reaction, and the reaction time is 0.5 hour, obtains vulcanization solution, and pH adjusting agent can be acid or alkali; The solution after adjusting in the described S2 step and Na 2 When S carries out mixing reaction, adopt stirrer to stir and mix, and its rotating speed is 30r / min, and stirring level is 7 grades, and reaction time 15min; Said Na 2 The concentration of S preparation is 10%; the metering pump of the mixed reaction tank is adde...

Embodiment 2

[0038] The method for rapidly reusing heavy metal wastewater comprises the following steps:

[0039] S1: The heavy metal-containing waste water is passed through the grid well 16 to remove the internal and suspended impurities, and is introduced into the pipeline mixer 1 through the pipeline;

[0040] S2: Use vulcanization technology to mix the heavy metal-containing wastewater and the pH regulator in the pipeline mixer 1, adjust the pH to 7, and then enter the mixing reaction tank 2 and add Na at the same time 2 S carries out mixing reaction, and the reaction time is 1 hour, obtains vulcanization solution, and pH adjusting agent can be acid or alkali; The solution after adjusting in the described S2 step and Na 2 When S is mixed and reacted, a stirrer is used to stir and mix, its rotating speed is 80r / min, the stirring grade is 7.5 grades, and the reaction time is 25min; the Na 2 The concentration of S preparation is 15%; the metering pump of the mixed reaction tank is added...

Embodiment 3

[0046] The method for rapidly reusing heavy metal wastewater comprises the following steps:

[0047] S1: The heavy metal-containing waste water is passed through the grid well 16 to remove the internal and suspended impurities, and is introduced into the pipeline mixer 1 through the pipeline;

[0048] S2: Use vulcanization technology to mix the heavy metal-containing wastewater and the pH regulator in the pipeline mixer 1, adjust the pH to 8, and then enter the mixing reaction tank 2 and add Na at the same time 2 S carries out mixing reaction, and the reaction time is 2 hours, obtains vulcanization solution, and pH adjusting agent can be acid or alkali; The solution after adjusting in the described S2 step and Na 2 When S is mixed and reacted, a stirrer is used to stir and mix, its rotating speed is 120r / min, the stirring grade is 8 grades, and the reaction time is 30min; the Na 2 The concentration of S preparation is 20%; the metering pump in the mixing reaction tank is adde...

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Abstract

The invention discloses a method and device for quickly recycling heavy metal wastewater, which comprises the following steps of: after the heavy metal wastewater passes through a grid well, pouring the heavy metal wastewater into a pipeline mixer, adding a PH regulator for acid-base blending, further introducing the solution into a mixing reaction tank for mixing and reacting with Na2S to obtaina sulfurized solution, introducing the sulfurized solution into a chemical coagulation tank, adding a coagulant for stirring and coagulating, adding a magnetic seed into the obtained solution througha magnetic seed adding device to coagulate a non-magnetic suspended substance in the solution and the added magnetic seed into a magnetic micelle; a magnetic recovery machine is used to recover the magnetic seed of silt, the magnetic micro-coagulation is further removed, in the coagulation pool, the upper clean water is introduced into the disinfection pool through an outlet, and the upper water is subjected to standardized treatment, the silt at the bottom of the coagulation pool is introduced into a silt dehydrator by using a screw feeder to dehydrate and recycle the coagulated material. According to the invention, the method can quickly precipitate, separate and recover the wastewater containing the heavy metals.

Description

technical field [0001] The invention relates to the technical field of heavy metal wastewater treatment, in particular to a method and a device for rapidly recycling heavy metal wastewater. Background technique [0002] With the development of my country's economy and society, the shortage of water resources and water pollution are becoming more and more serious. Heavy metal wastewater is one of the most serious environmental pollution and one of the most harmful industrial wastewater to humans. Relevant statistics show that my country's metal wastewater accounts for about 10% of the total wastewater discharge, mainly from mining, metallurgy, machinery manufacturing, chemical industry, electronics, etc. Industrial production processes such as instruments and instruments are potentially harmful. These wastewater mainly contain heavy metal elements such as antimony, copper, lead, zinc, cadmium, arsenic, chromium, etc. If not handled properly, it will easily cause arsenic pollut...

Claims

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Application Information

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IPC IPC(8): C02F9/12C02F101/20
Inventor 朱树文杨士勇
Owner 云南恒碧环保科技有限公司
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