Sludge solidifying agent and its preparation method and application

A curing agent and sludge technology, applied in the field of sludge curing agent and its preparation, can solve the problems of complex composition, long processing time, landfill engineering geological disasters, etc., achieve unique dispersion, strong water absorption, and improve the effect of sludge characteristics

Active Publication Date: 2021-04-20
湖北恒沁环保科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high water content of sewage sludge and the high content of pollutants and complex components, the existing treatment methods generally have environmental pollution, high treatment costs, and long treatment time. At the same time, they are also likely to cause problems such as landfill engineering geological disasters.

Method used

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  • Sludge solidifying agent and its preparation method and application
  • Sludge solidifying agent and its preparation method and application
  • Sludge solidifying agent and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A preparation method of a sludge solidifying agent, comprising the following steps: (1) selecting raw materials according to the following weight percentages, for subsequent use: 30% of modified diatomite, 35% of attapulgite, 5% of calcium chloride, 3% of potassium permanganate %, sodium peroxide 15%, cationic chelate 5%, sodium hypochlorite 2%, sodium lauryl sulfate 0.1%, acrylic acid-methacrylic acid copolymer 0.5%, polyoxyethylene-polyoxypropylene copolymer 1.4%, three 1% ethanolamine, 2% melamine formaldehyde resin; (2) fully mix and stir the above raw materials in a mixer. The cationic chelate is formed by chelating ethylenediaminetetraacetic acid (EDTA) and magnesium ions.

[0033] The application method of the silt curing agent comprises the steps of: adding the curing agent into the silt according to the mixing ratio of 38%: 1 in the mass ratio of the curing agent to the silt, then fully mixing, and then drying and curing naturally for 0.5h be usable.

Embodiment 2

[0035] A preparation method of a sludge solidifying agent, comprising the steps of: (1) selecting raw materials according to the following weight percentages, for subsequent use: 35% of modified diatomite, 32% of attapulgite, 4% of calcium chloride, 2% of potassium permanganate %, calcium peroxide 10%, strontium peroxide 2%, cationic chelate 4%, sodium hypochlorite 1.8%, isothiazolinone 0.2%, sodium lauryl sulfate 0.2%, acrylic acid-methacrylic acid copolymer 0.6%, poly 1% of oxyethylene-polyoxypropylene copolymer, 3.2% of chitosan, 1.8% of triethanolamine, 2.2% of melamine formaldehyde resin; (2) fully mixing and stirring the above raw materials in a mixer.

[0036] The cationic chelate is formed by chelating dihydroxyethylglycine (DEG) and calcium ions.

[0037] The application method of the sludge curing agent comprises the steps of: adding the curing agent into the sludge according to the mixing ratio of the curing agent and the sludge mass ratio of 30%: 1, then fully mixi...

Embodiment 3

[0039]A preparation method of a sludge solidifying agent, comprising the following steps: (1) selecting raw materials according to the following weight percentages, for subsequent use: modified diatomite 38%, attapulgite 34%, calcium chloride 3%, potassium permanganate 1 %, Magnesium peroxide 6%, Potassium monopersulfate 4%, Cationic chelate 3%, Sodium hypochlorite 1.5%, Isothiazolinone 0.4%, Sodium lauryl sulfate 0.3%, Acrylic acid-methacrylic acid copolymer 0.7% , 0.8% of polyoxyethylene-polyoxypropylene copolymer, 1.8% of chitosan, 3% of triethanolamine, 2.5% of melamine formaldehyde resin; (2) fully mixing and stirring the above-mentioned raw materials in a mixer. The cationic chelate is formed by chelating dihydroxyethylglycine (DEG) and magnesium ions.

[0040] The application method of the silt curing agent comprises the steps of: adding the curing agent into the silt according to the mixing ratio of 22%:1 according to the mass ratio of the curing agent and the silt; b...

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Abstract

The invention provides a sludge curing agent and its preparation method and application. The sludge curing agent is composed of the following raw materials in weight percentage: 30-50% of modified diatoms, 30-35% of attapulgite, 2-5% of calcium chloride %, potassium permanganate 1‑3%, peroxide 5‑15%, cationic chelate 1‑5%, sodium hypochlorite 1‑2%, isothiazolinone 0‑1%, sodium lauryl sulfate 0.1%‑ 0.5%, acrylic-methacrylic acid copolymer 0.5-1%, polyoxyethylene-polyoxypropylene copolymer 0.5-2%, chitosan 0-5%, triethanolamine 1-5%, melamine formaldehyde resin 2-3 %. Adding the sludge solidifying agent of the present invention to sludge can make the sludge have low water content, good curing effect, short curing time and high efficiency.

Description

technical field [0001] The invention relates to the field of sludge treatment, in particular to a sludge solidifying agent and its preparation method and application. Background technique [0002] Sludge is a viscous substance produced in the process of sewage treatment. It is mainly composed of aerobic and anaerobic microorganisms. It is a complex mixture of organic matter, metals, germs, insect eggs, colloids, etc. For large urban sewage treatment plants and rivers and lakes in cities, due to the large amount of industrial wastewater discharged into the system, the sewage sludge contains a large number of microorganisms, pathogens, heavy metals and organic pollutants, and the water content is generally 80%. Above, if not handled properly, it will cause serious secondary pollution. [0003] Most of the existing sludge solidification methods use cement and quicklime as the main body. The role of cement is to increase the adhesiveness of the sludge, make the sludge bond tog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/12
CPCC04B26/125C04B2111/00775C04B14/08C04B14/104C04B22/124C04B22/08C04B22/068C04B24/12C04B22/12C04B24/008C04B24/16C04B24/26C04B24/28C04B24/121C04B24/122
Inventor 段恒张沁寰
Owner 湖北恒沁环保科技有限责任公司
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