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Device and method for removing heavy metal complexes from biogas slurry

A technology of heavy metals and complexes, applied in the field of environmental treatment, can solve the problems of decreased contact probability between heavy metal ions and iron particles, reduced removal efficiency, etc., and achieve the effect of increasing the rate of releasing electrons, increasing the space contact rate, and improving the removal efficiency

Active Publication Date: 2019-09-27
BIOGAS SCI RES INST MIN OF AGRI
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Problems solved by technology

[0005] However, traditional zero-valent iron removal of heavy metal ions in solution is generally achieved through static contact: that is, iron particles are shaken in a static aqueous solution to react with heavy metal ions, and the iron particles are gradually settled under the action of gravity. At the bottom of the solution, the probability of contact between heavy metal ions and iron particles decreases, and the removal efficiency gradually decreases

Method used

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  • Device and method for removing heavy metal complexes from biogas slurry
  • Device and method for removing heavy metal complexes from biogas slurry
  • Device and method for removing heavy metal complexes from biogas slurry

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[0026] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention are clearly and completely described below. Apparently, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0027] figure 1 It is a structural schematic diagram of the heavy metal removal unit of the present invention; figure 2 It is a schematic diagram of the device structure for removing heavy metal complexes in the biogas slurry of the present invention; as figure 1 , figure 2 As shown, the device for removing heavy metal complexes in the biogas slurry includes several heavy metal removal units arranged in an array according to certain rules, and the unit includes:...

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Abstract

The invention provides a device and method for removing heavy metal complexes from biogas slurry. The device comprises a heavy metal removal unit, the heavy metal removal unit comprises an electromagnet column, iron-based magnetic particles are distributed on the surface of the electromagnet column, and each of the two ends of the electromagnet column is communicated with a current loop. According to the device, the contact efficiency of iron particles and the heavy metal complexes can be improved, in addition, the electron donating rate of the iron particles can be increased, and the removal efficiency of heavy metals can be improved from the internal and external factors.

Description

technical field [0001] The invention relates to the technical field of environmental treatment, in particular to a device and method for removing heavy metal complexes from biogas slurry. Background technique [0002] The biogas slurry produced by the operation of large and medium-sized biogas projects in intensive pig farms contains a large amount of heavy metals such as copper and zinc and soluble organic matter. Studies have shown that heavy metals in biogas slurry are not simply charged cations (Cu 2+ / Zn 2+ ) exist, but combine with the soluble organic matter in the biogas slurry to form complexes with different charge states. These complexes are difficult to remove by traditional chemical methods such as acid-base precipitation, which brings new technical challenges to the safe treatment and disposal of biogas slurry. At present, the main technical principle of the method of removing heavy metal complexes in the solution is to change the complexation state of heavy ...

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Application Information

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IPC IPC(8): C02F1/48C02F101/20C02F101/30C02F103/20
CPCC02F1/484C02F2101/20C02F2101/30C02F2103/20C02F2201/48
Inventor 朱能敏杨丹邓雅月周正李强
Owner BIOGAS SCI RES INST MIN OF AGRI
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