Method for preparing polymeric aluminum iron flocculating agent from wire rope acid sludge

A technology of polymerized aluminum iron and flocculant, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, sludge treatment, etc., can solve the problems of wasting resources, occupying landfill sites, and underutilizing metal elements, etc. To achieve the effect of excellent purification performance

Active Publication Date: 2015-12-23
刘阳生
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above two methods are based on the idea of ​​waste disposal to deal with steel wire rope acid mud, and the metal elements such as iron and aluminum contained in the acid mud are not fully utilized, which not only wastes resources, but also occupies landfill sites

Method used

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  • Method for preparing polymeric aluminum iron flocculating agent from wire rope acid sludge

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Experimental program
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Effect test

Embodiment 1

[0024] see figure 1 2000L mass concentration of 10% sulfuric acid solution 1 is added to the reaction tank 2, then 1000kg of sodium mud with a water content of 75% is added, stirred and reacted at room temperature for 30 minutes, and 10kg of sodium mud residue A5 is removed by the plate and frame filter press 3 , Obtain the sulfuric acid extract solution A4 of 2500L sodium mud. Add 2000L of hydrochloric acid solution 10 with a mass concentration of 18% into the calcium mud reactor 11, then add 1000kg of calcium mud with a moisture content of 75%, stir and react at room temperature for 30 minutes, and remove 15kg of calcium mud residue through the plate and frame filter press 12 B6, obtain the hydrochloric acid extraction solution 13 of 2500L calcium mud. The calcium mud hydrochloric acid extraction solution 13 was treated with a D113 type macroporous weakly acidic acrylic cation exchange resin 14 for 60 minutes to obtain the calcium mud hydrochloric acid extraction solution B...

Embodiment 2

[0029] see figure 1 2000L mass concentration of 20% sulfuric acid solution 1 was added to the reaction tank 2, then 1000kg of sodium mud with a water content of 80% was added, stirred and reacted at room temperature for 45 minutes, and the plate and frame filter press 3 was used to remove 12kg of sodium mud residue A5, Obtain the sulfuric acid extraction solution A4 of 2600L sodium mud. Add 2000L of hydrochloric acid solution 10 with a mass concentration of 25% into calcium mud reactor 11, then add 1000kg of calcium mud with a water content of 78%, stir and react at room temperature for 45 minutes, and remove 16kg of calcium mud residue B6 through plate and frame filter press 12 , to obtain the hydrochloric acid extract 13 of 2600L calcium mud. After the calcium mud hydrochloric acid extraction solution 13 was treated with a 201×7 type strongly basic styrene-based anion exchange resin 14 for 60 minutes, the lead-free calcium mud hydrochloric acid extraction solution B19 was o...

Embodiment 3

[0033] Example 3: Example of use

[0034] The polyaluminium-iron flocculant prepared in Example 1 was used for domestic sewage treatment. at 1m 3 Add 1.5kg of polyaluminium-iron flocculant to the domestic sewage, stir for 5 minutes, let it settle for 60 minutes, and take samples to test the treatment effect of domestic sewage. Before treatment, domestic sewage turbidity 226.7NTU, COD Cr 715.6mg / L, ammonia nitrogen 32mg / L, total phosphorus 3.8mg / L, after treatment with polyaluminium-iron flocculant, the sewage turbidity decreased by 98%, COD Cr , ammonia nitrogen and total phosphorus removal rates were 78.5%, 80.3% and 80%.

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Abstract

The invention discloses a method for preparing a polymeric aluminum iron flocculating agent from wire rope pickling sludge (acid sludge). According to the method, hydrochloric acid and sulfuric acid are used as extracting agents to extract metal iron ions and aluminum ions from calcium sludge and sodium sludge respectively, lead ions are removed by ion exchange resin, and the extraction liquid is further processed to obtain the polymeric aluminum iron flocculating agent, so that resource utilization of the calcium sludge and the sodium sludge is realized; cement is added to calcium sludge residues and sodium sludge residues for solidifying, so that stabilization and harmlessness of heavy metals in the residues are realized; and deionized water is used for regenerating saturated ion exchange resin, and a sodium hydroxide solution is used for treating wastewater generated in the regeneration process to realize standard discharge of the wastewater. The method has recovery rate of more than 90% for iron and aluminum in the acid sludge; and the flocculating agent has excellent purification performance for domestic wastewater.

Description

technical field [0001] The invention belongs to the field of harmless treatment and resource utilization of industrial sludge, and relates to a method for preparing a polymerized aluminum-iron flocculant from steel wire rope acid mud. Background technique [0002] A large amount of acidic wastewater is produced in the production process of steel wire rope, mainly from the pickling and phosphating production process, which contains a large amount of heavy metal elements, such as iron, lead and zinc, etc. The wastewater treatment method mainly adopts the hydroxide precipitation method. Lime milk or sodium hydroxide is used as an alkaline precipitant, which is added to the wastewater, and the heavy metals are separated by neutralization to form insoluble hydroxide precipitates, and the formed precipitates are wire rope pickling sludge, referred to as Acid mud, acid mud is disposed of after plate and frame filter press. The acid mud produced by calcium hydroxide precipitation m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F11/00C02F103/16
Inventor 刘阳生施荣标
Owner 刘阳生
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