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Process for preparing polymerized aluminum by burnt waste slag of sludge

A technology for polymerizing aluminum and waste slag, which is applied in the fields of aluminum chloride, aluminum halide, flocculation/sedimentation water/sewage treatment, etc. It can solve the problems of environmental pollution and waste of aluminum resources, and reduce pollutant discharge and aluminum resource consumption Effect

Active Publication Date: 2010-07-28
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After investigation and evaluation of the aluminum (as Al 2 o 3 The content can reach more than 20%, and the highest can reach 50% to 60%. It has a relatively high aluminum content. If it is not recycled, it will not only waste aluminum resources, but also cause environmental pollution.

Method used

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  • Process for preparing polymerized aluminum by burnt waste slag of sludge
  • Process for preparing polymerized aluminum by burnt waste slag of sludge

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Experimental program
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Embodiment 1

[0014] Embodiment 1: see figure 1 .

[0015] 1. take by weighing 228g oilfield sewage sludge burning waste residue, the aluminum oxide (Al 2 o 3 ) content is 30%.

[0016] 2. According to the equivalent ratio of aluminum oxide and hydrochloric acid contained in the sludge burning waste residue of 1: 1.17, in a 2L conical flask, add 508ml of hydrochloric acid aqueous solution with a concentration of 30%, slowly add the above burning waste residue under magnetic stirring, After the addition, airtight stirring was carried out for 2 hours and 30 minutes, and the aluminum chloride (AlCl) was separated by a horizontal screw centrifuge. 3 ) solution;

[0017] 3. Under the condition of strong stirring, according to the aluminum chloride (AlCl) contained in the aluminum chloride solution 3 ) and the weight ratio of calcium oxide is 1: 0.52, slowly add calcium oxide powder 60g in the aluminum-containing acid liquid that is centrifuged, stir 3 hours, obtain liquid product polyalumin...

Embodiment 2

[0018] Embodiment 2: see figure 1 .

[0019] 1. Take by weighing 450g oil refinery sewage sludge burning waste residue, the aluminum oxide (Al 2 o 3 ) is 45%.

[0020] 2. According to the equivalent ratio of alumina and hydrochloric acid contained in the sludge burning waste residue of 1: 1.08, the concentration of adding in a 2L conical flask is to add 1383ml of 30% aqueous hydrochloric acid solution, slowly add the above-mentioned roasting residue under magnetic stirring, add After airtight stirring after 3 hours, adopt the centrifugal sedimentation method to separate the aluminum chloride (AlCl 3 ) solution;

[0021] 3. Under the condition of strong stirring, according to the weight ratio of aluminum chloride and calcium oxide contained in the aluminum chloride solution is 1:0.43, slowly add 140g of calcium oxide powder to the centrifuged aluminum chloride-containing acid solution , stirred for 3 hours to obtain the liquid product polyaluminum, its aluminum (according ...

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Abstract

The invention relates to a method for preparing polyaluminium chloride from sludge incineration waste residues, which comprises the steps of adding the sludge incineration waste residues into 10-30% hydrochloric acid in accordance with the equivalence ratio of alumina and hydrochloric acid 1.0:(1.0-1.5), stirring at room temperature, allowing reaction for 2-10 hours, and performing solid-liquid separation; and adding calcium oxide powder into the obtained aluminum chloride-containing acid solution in accordance with the weight ratio of aluminum chloride and calcium oxide 1.0:(0.3-0.6), and stirring at room temperature for 2-24 hours to obtain polyaluminium solution. The inventive method can be used for pyrolysis and incineration waste residues resource treatment of sludge formed by aluminum salt flocculation agent for sewage treatment; can realize recovery and cyclic utilization of the aluminum salt flocculation agent added in sewage treatment process, and reduce pollutant emission and aluminum resource consumption; and is helpful for clean production and resource saving of sewage treatment system.

Description

technical field [0001] The invention relates to a method for preparing polymerized aluminum from sludge burning waste residue. The method is suitable for purification treatment of industrial water, industrial sewage such as oilfields, refining and chemical sewage, and urban domestic sewage with aluminum salt flocculation agents for purification treatment and sludge treatment. The sludge formed by concentration, the aluminum-containing waste slag formed by incineration, or the aluminum salt of the aluminum-containing waste slag that has been decarbonized by burning the residue after pyrolysis treatment is recovered and reused. Background technique [0002] Polyaluminum is also known as basic aluminum chloride or aluminum hydroxychloride. It has the characteristics of strong coagulation ability, less consumption, high water purification efficiency and strong adaptability, and is widely used in industrial water and wastewater treatment in printing and dyeing, leather making, me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/56C02F1/52
Inventor 王万福何银花杜卫东刘颖
Owner PETROCHINA CO LTD