Preparation and application of modified fly ash for deeply treating refinery waste water

A technology for advanced treatment of oil refinery wastewater, applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of large investment and high cost, and achieve improved adsorption capacity, low cost, The effect of reducing occupancy

Inactive Publication Date: 2016-12-21
STATE GRID TIANJIN ELECTRIC POWER +1
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Problems solved by technology

[0002] Most of the oily wastewater treatment in the petroleum refining industry adopts the old three sets of treatment processes of "oil separation, flotation, and biochemistry". Large and costly, many companies cannot afford it

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  • Preparation and application of modified fly ash for deeply treating refinery waste water
  • Preparation and application of modified fly ash for deeply treating refinery waste water
  • Preparation and application of modified fly ash for deeply treating refinery waste water

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[0028] Screening for the most suitable modification method

[0029] Fly ash contains a large amount of silica and alumina with relatively stable properties, and its adsorption performance cannot be better exerted. It must be modified on its surface or structure to enhance its activity. Through the comparison of adsorption efficiency under different modification conditions such as calcium-increasing roasting, lye modification, sulfuric acid modification, and hydrochloric acid modification, the most suitable modifier was selected, as shown in Table 1:

[0030] Table 1: Modifier composition: (Based on 1g of fly ash)

[0031] Sodium chloride

Sulfuric acid (2mol / L)

Hydrochloric acid (4mol / L)

0.05g

0.5ml

0.5ml

[0032] Note: (1) Modification method: mix fly ash and modifier at room temperature, mix and stir for 30 minutes, filter, rinse with deionized water repeatedly, conduct sufficient electric drying at 120°C, and grind to obtain acid-modified p...

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Abstract

The invention relates to preparation of modified fly ash for deeply treating refinery waste water. The preparation comprises the steps of (1) forming a modifying agent: adopting 1g of fly ash as the basis, and adding 0.05g of sodium chloride, 0.5ml of sulfuric acid with the concentration of 2mol / L, and 0.5ml of hydrochloric acid with the concentration of 4mol / L into the modifying agent; (2) modifying the fly ash, mixing and stirring the fly ash and the modifying agent at room temperature, filtering, washing, drying and grinding to prepare acid modified fly ash. An application method of the modified fly ash is characterized by adding the prepared modified fly ash into waste water to be treated according to the proportion of the waste water to the modified fly ash as 100ml to 10g, and stirring and adsorbing for 45 to 60 minutes. According to the preparation and application of the modified fly ash for deeply treating the refinery waste water provided by the invention, the adsorption capacity of the fly ash is greatly improved, the aim of dealing with waste by waste is achieved, the cost is low, the land use is less, the environment protection and the economy are realized.

Description

technical field [0001] The invention belongs to the technical field of oily wastewater treatment, in particular to the preparation and use of modified fly ash for advanced treatment of oil refining wastewater. Background technique [0002] Most of the oily wastewater treatment in the petroleum refining industry adopts the old three sets of treatment processes of "oil separation, flotation, and biochemistry". Large and costly, many companies cannot afford it. [0003] Fly ash is one of the largest industrial wastes in my country, and the annual slag discharge in China has reached 30 million tons at this stage. The disposal and utilization of fly ash has attracted widespread attention, and people have gradually paid attention to this misplaced resource. Fly ash is rich in active oxides S i o 2 and Al 2 o 3 The main glass beads, as well as a small amount of metal oxides and unburned carbon, have large specific surface area, many microporous structures, and strong adsorpti...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/30C02F1/28
CPCB01J20/103B01J20/041B01J20/046B01J20/06B01J20/08B01J2220/42B01J2220/4806C02F1/281
Inventor 张佳成郭军科甘智勇刘国臣姜国飞郭锐
Owner STATE GRID TIANJIN ELECTRIC POWER
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