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Method for preparing desulfurizing agent from Fenton iron sludge

A desulfurizer and iron sludge technology, applied in the field of desulfurization, can solve the problems of cumbersome process control, secondary pollution, consumption of large acids, alkalis and complexing agents, etc., to avoid environmental pollution, fast sulfur absorption, and reduce disposal costs. Effect

Inactive Publication Date: 2020-01-10
POTEN ENVIRONMENT GRP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method consumes a large amount of acid, alkali and complexing agent, and is prone to secondary pollution. In actual operation, the process control is more cumbersome.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] This embodiment is used to illustrate the method that utilizes Fenton's iron slime to prepare desulfurizer, specifically comprises the following steps:

[0056] (1) The Fenton iron slime with a moisture content of 98% is naturally air-dried to reduce its moisture content to 30%;

[0057] (2) Get 100 parts by mass of Fenton's iron mud with a moisture content of 30%, add 15 parts by mass of CaO (binder), 0.15 parts by mass of NH 4 HCO 3 (pore forming agent), 2 mass parts of gypsum (strengthening agent), fully stirred evenly;

[0058] (3) adjusting the humidity of the mixed material to be 12%, adopting a flat die granulator with an aperture of 3mm to extrude and granulate to obtain a desulfurizer prefabricated material with a particle diameter of 3mm;

[0059] (4) Roasting at 420°C for 2.5 hours to prepare a desulfurizer.

[0060] After testing, the desulfurizer has a pore volume of 0.53mL / g, a saturated working sulfur capacity of 54%, and a strength of over 90N.

Embodiment 2

[0062] This embodiment is used to illustrate the method that utilizes Fenton's iron slime to prepare desulfurizer, specifically comprises the following steps:

[0063] (1) After dehydrating the Fenton iron slime with a moisture content of 98% to a moisture content of about 70% by using a plate and frame filter press, the moisture content is reduced to 30% by heating;

[0064] (2) Get 100 parts by mass of Fenton's iron mud with a moisture content of 30%, add 10 parts by mass of CaO and MgO (composite binder) of 10 parts by mass, the NaHCO of 0.05 parts by mass 3 (pore forming agent), 10 parts by mass of water glass (strengthening agent), 2 parts by mass of Mn (NO 3 ) 2 (Catalyst promoter), fully stir evenly;

[0065] (3) Add a small amount of water to adjust the humidity of the mixed material to be 15%, and use a flat die granulator with an aperture of 8 mm to extrude and granulate to obtain a desulfurizer prefabricated material with a particle diameter of 8 mm;

[0066] (4)...

Embodiment 3

[0069] This embodiment is used to illustrate the method that utilizes Fenton's iron slime to prepare desulfurizer, specifically comprises the following steps:

[0070] (1) Use a plate and frame filter press to dehydrate the Fenton iron slime with a moisture content of 98% to a moisture content of about 70%, and reduce the moisture content to about 20% by heating;

[0071] (2) Get 100 parts by mass of Fenton's iron mud with a water content of 20%, add 10 parts by mass of MgO (composite binder), 0.08 parts by mass of starch (pore-forming agent), and fully stir;

[0072] (3) adjusting the humidity of the mixed material to be 8%, adopting a flat die granulator with an aperture of 3mm to extrude and granulate to obtain a desulfurizer prefabricated material with a particle diameter of 3mm;

[0073] (4) Roasting at 380°C for 4 hours to prepare a desulfurizer.

[0074] After testing, the desulfurizer has a pore volume of 0.40mL / g, a saturated working sulfur capacity of 48%, and a str...

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Abstract

The invention relates to the technical field of desulfurization, and particularly discloses a method for preparing a desulfurizing agent. The method comprises the following steps: adding certain amounts of an adhesive and a pore-forming agent to dehydrated Fenton iron sludge used as a main raw material, and performing an extrusion molding calcination process to prepare the desulfurizing agent. Themethod allows the desulfurizing agent with an excellent effect to be prepared from the Fenton iron sludge by adopting the cheap adhesive and pore-forming agent without adjusting the pH and using reagents which easily generate secondary pollution, such as acids, alkalis and complexing agents, and achieves recycling of the Fenton iron sludge. The desulfurizing agent prepared in the invention takesiron oxide as a main component, so the desulfurizing agent has a high sulfur capacity, a high sulfur absorption weight gain rate and a high sulfur absorption rate; high-temperature calcination makes the desulfurizing agent have a high strength, a long service life, a high crushing strength and a wide application range; and the desulfurizing agent also has the advantages of high desorption rate, renewability and simple regeneration process.

Description

technical field [0001] The invention relates to the technical field of desulfurization, in particular to a preparation method of a desulfurizer. Background technique [0002] Fenton oxidation is an efficient and economical advanced wastewater oxidation technology. Under acidic conditions, hydrogen peroxide reacts with ferrous ions to generate strong oxidizing hydroxyl radicals (OH), which oxidize pollutants in wastewater. into CO 2 and H 2 O, thereby effectively removing organic matter in wastewater. The Fenton oxidation method has the advantages of strong oxidation ability, simple equipment, easy operation, and low operating cost, and is widely used in the treatment of industrial wastewater in chemical, paper, printing and dyeing, pharmaceutical and other industries. [0003] However, ferrous iron will be oxidized to ferric iron in the Fenton oxidation process, and a large amount of Fenton iron sludge will be produced in the subsequent pH adjustment process. These Fenton...

Claims

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Application Information

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IPC IPC(8): B01D53/81B01D53/48
CPCB01D53/48B01D53/81
Inventor 陈伟燕迟娟张波姜勇耿翠玉邢晓丹
Owner POTEN ENVIRONMENT GRP