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Process for enriching heavy metals in desulfurization wastewater based on high-stability adsorbent

A high stability, adsorbent technology, applied in the direction of adsorption of water/sewage treatment, water pollutants, water/sewage treatment, etc., can solve the problems of on-site resource waste, inability to reuse, large amount of sludge, etc., to avoid The effect of secondary pollution, wide selection range and high adsorption efficiency

Active Publication Date: 2020-03-31
HUANENG SHANDONG POWER GENERATION CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inventors of the present invention have found through research that although the separation effect of this process is good, the separated heavy metal ions are separated from wastewater in the form of sludge, which needs to be treated in the form of hazardous waste and cannot be reused. It is a waste of resources. At the same time, setting up an organic sulfur dosing pool on site also increases the project cost and operating cost, and because the amount of sludge formed after adding organic sulfur chemicals is large, it is very easy to cause blockage due to the increase in the amount of sludge , need to be cleaned regularly these are a waste of on-site resources

Method used

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  • Process for enriching heavy metals in desulfurization wastewater based on high-stability adsorbent
  • Process for enriching heavy metals in desulfurization wastewater based on high-stability adsorbent
  • Process for enriching heavy metals in desulfurization wastewater based on high-stability adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 1. Al 2 o 3 , MgCO 3 、TiO 2 , Fe 2 o 3 and activated carbon particles, fully stirred and mixed according to the mass ratio of 20:10:3:1:1, and then pressed into a cylindrical shape with a compression molding machine, and then calcined in a muffle furnace, and the temperature was raised to 550 at a heating rate of 3°C / min. ℃, the holding time is 4h, continue to heat up to 900°C at a heating rate of 4°C / min, the holding time is 2h, and then cool to room temperature. The adsorbent of the cleaned powder is ultrasonically cleaned with 5% HCl, then soaked in 3% NaOH solution (the mass ratio of adsorbent to NaOH solution is 1:1), and then 1% NaOH is added. 2 CO 3 , 1% sodium citrate was reacted in a 1L autoclave at 130° C., and rinsed with desalted water for 3 times after reacting for 3 hours.

[0049] 2. Use the desulfurization wastewater heavy metal concentration and reduction device to enrich the desulfurization wastewater with heavy metal ions. The desulfurization w...

Embodiment 2

[0054] Embodiment 1 is the same as Embodiment 1, except that the desulfurization wastewater from Huaneng Canal Power Plant is treated. The detection structure is shown in Table 2.

[0055] Table 2

[0056]

[0057]

Embodiment 3

[0059] The present embodiment 1 is the same as the embodiment 1, except that: the desulfurization wastewater from Huaneng Huangtai Power Plant is treated. The detection structure is shown in Table 3.

[0060] table 3

[0061]

[0062] The results of Examples 1 to 3 show that the present invention can carry out heavy metal enrichment treatment on desulfurization wastewater from multiple power plants by constructing a desulfurization wastewater heavy metal enrichment process based on a high-stability ceramic adsorbent, and can separate the original wastewater More than 99% of heavy metals in the water, and can be concentrated to 1-3% of the volume of raw water, and the ceramic adsorbent is stable, and the surface is not easy to be blocked by small particles in the wastewater, so that the ceramic adsorbent can be used in desulfurization wastewater for a long time. stability. This process can not only fully separate all kinds of heavy metals in desulfurization wastewater, rea...

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Abstract

The invention discloses a process for enriching heavy metals in desulfurization wastewater based on a high-stability adsorbent. A high-stability ceramic adsorbent is adopted to prepare a leaching andeluting process for heavy metal separation; the preparation method of the high-stability ceramic adsorbent comprises the following steps: uniformly mixing and compressing aluminum oxide, magnesium carbonate, titanium dioxide, iron oxide and a carbon material; calcining in an air atmosphere; washing ta calcined material with diluted hydrochloric acid; soaking in a sodium hydroxide solution; addingsodium carbonate and sodium citrate into the soaked material for hydrothermal reaction; and reacting to obtain the high-stability ceramic adsorbent. According to the process, heavy metal ions in the desulfurization wastewater are separated and then enriched; because the dissolved heavy metal ions are more widely used than the combined heavy metal ions, the process provided by the invention provides a reasonable recycling way for the separated heavy metal ions, thereby not only meeting the current environmental protection requirement, but also meeting the green process route of current resourcerecycling.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and relates to a process for efficiently enriching and recovering various heavy metal ions in desulfurization wastewater, in particular to a process for enriching heavy metals in desulfurization wastewater based on a high-stability adsorbent. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] With the increasing demand for power generation and heating, the amount of desulfurization wastewater generated by power plants is increasing. Desulfurization wastewater belongs to the terminal wastewater of the whole plant. It has the characteristics of many types of pollutants, complex water quality, and hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20C02F1/28B01J20/30C02F101/20
CPCB01J20/06B01J20/043B01J20/20C02F1/283C02F1/281C02F2101/20
Inventor 焦绪常孙业富李尊峰李亚明杜纪明高冰张志霞王蕴宏
Owner HUANENG SHANDONG POWER GENERATION CO LTD
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