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Device and method for synergistic treatment of wastewater containing heavy metals by magnetic treatment and sulfidation

A technology of collaborative treatment and magnetic treatment, applied in chemical instruments and methods, magnetic field/electric field water/sewage treatment, water/sewage treatment, etc. Environmental benefits, effects of increasing crystal size, speeding up reaction rates

Active Publication Date: 2021-11-16
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a device for co-processing wastewater containing heavy metals by magnetic treatment and vulcanization, so as to solve the problem that the existing wastewater treatment technology cannot meet the domestic wastewater discharge standards

Method used

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  • Device and method for synergistic treatment of wastewater containing heavy metals by magnetic treatment and sulfidation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Cu in wastewater 2+ , Pb 2+ , Zn 2+ The concentration is 1g / L.

[0036] Step 1. Inject the waste water to be treated into the water tank 6, the magnetization intensity is 0.2T m, the length of the magnet 1 is 0.5m, and the magnetic induction intensity is set to 0.4T;

[0037] Step 2: Turn on the water pump 5, adjust the flow rate of the waste water to 3m / s through the valve 4 by means of the flowmeter 8, the volume of the waste water to be treated is 100L, and the cross-sectional area of ​​the water pipe is 0.1m 2 , the magnetization time is 335s;

[0038] Step 3, turn on the stirring device 3 and the heating device 2, set the rotating speed of the stirring device 3 to 200r / min, set the temperature of the heating device 2 to 40°C, add Na at a concentration of 2.5g / L and a flow rate of 200L / h 2 S, heavy metal ion Cu was measured after 30 min 2+ , Pb 2+ , Zn 2+ The precipitation rates were 86.2%, 84%, and 81%, respectively.

Embodiment 2

[0040] Cu in wastewater 2+ , Pb 2+ , Zn 2+ The concentration is 1.5g / L.

[0041] Step 1. Inject the waste water to be treated into the water tank 6, the magnetization intensity is 0.4T m, the length of the magnet 1 is 0.5 m, and the magnetic induction intensity is set to 0.8T;

[0042] Step 2, turn on the water pump 5, adjust the flow rate of the waste water to 5 m / s through the valve 4 by means of the flow meter 8, the volume of the waste water to be treated is 100L, and the cross-sectional area of ​​the water pipe is 0.1m 2 , the magnetization time is 200s;

[0043] Step 3, turn on the stirring device 3 and the heating device 2, set the rotating speed of the stirring device 3 to 200r / min, set the temperature of the heating device 2 to 70°C, and add Na with a concentration of 2.8g / L and a flow rate of 300L / h 2 S, heavy metal ion Cu was measured by sampling after 40min 2+ , Pb 2+ , Zn 2+ The precipitation rates were 90.3%, 87.8%, and 83.3%, respectively.

Embodiment 3

[0045] Cu in wastewater 2+ , Pb 2+ , Zn 2+ The concentration is 2g / L.

[0046] Step 1. Inject waste water to be treated into the water tank 6, the magnetization intensity is 0.5T·m, the length of the magnet 1 is 0.5m, and the magnetic induction intensity is set to 1T;

[0047] Step 2: Turn on the water pump 5, adjust the flow rate of the waste water to 6m / s through the valve 4 by means of the flowmeter 8, the volume of the waste water to be treated is 100L, and the cross-sectional area of ​​the water pipe is 0.1m 2 , the magnetization time is 170s;

[0048] Step 3, turn on the stirring device 3 and the heating device 2, set the rotating speed of the stirring device 3 to be 500r / min, use the temperature regulator 3 to set the temperature of the heating device 2 to be 55°C, set the concentration to 4.5g / L, and the flow rate to be 250L / min h added to Na 2 S, heavy metal ion Cu was measured by sampling after 60 min 2+ , Pb 2+ , Zn 2+ The precipitation rates were 96.5%, 93....

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Abstract

The invention discloses a device and method for synergistically treating waste water containing heavy metals by magnetic treatment and vulcanization, which belongs to the field of waste water treatment and solves the problem that the existing waste water treatment technology cannot meet domestic waste water discharge standards. The device of the present invention includes a water tank and a heating device, and also includes a magnet, a water pump, a valve, a flow meter and a water pipe, and the magnet, the water pump, the valve, the flow meter, the heating device and the water tank are connected in series on the water pipe to form a circulation loop. The method of the present invention is: inject the wastewater to be treated into the water tank, set the magnetic induction intensity of the magnet; turn on the water pump, adjust the flow rate of the wastewater to be treated, and magnetize under this condition; turn on the stirring device and the heating device, add vulcanizing agent, React for 30-60 minutes. The beneficial effects of the present invention are: speed up the reaction rate, reduce H 2 The overflow of S gas reduces the amount of vulcanizing agent used.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to a device and method for co-processing wastewater containing heavy metals by magnetic treatment and vulcanization. Background technique [0002] As the types and quantities of pollutants contained in modern industrial wastewater become more and more complex, it is difficult to meet the requirements with a single conventional water treatment agent, and advanced treatment is urgently needed. Especially the situation that the wastewater contains a large amount of heavy metal ions is particularly serious. The discharge of these wastewaters not only poses a threat to aquatic organisms, but may also be continuously enriched through sedimentation, adsorption and food chains, destroying the ecological environment and ultimately threatening human health. [0003] Wastewater treatment technologies are mainly physical, chemical, and biological methods. With the continuous im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/48C02F1/52C02F101/20
CPCC02F1/481C02F1/5236C02F2101/20
Inventor 姚夏妍余江鸿鲁兴武李彦龙程亮李俞良李守荣张恩玉李贵
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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