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A kind of 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 landfill engineering geological disasters, high pollutant content, long processing time, etc., achieve short curing time, high efficiency, and reduce moisture content Effect

Active Publication Date: 2021-11-23
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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  • A kind of sludge solidifying agent and its preparation method and application
  • A kind of sludge solidifying agent and its preparation method and application
  • A kind of sludge solidifying agent and its preparation method and application

Examples

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Effect test

Embodiment 1

[0032] A preparation method of a sludge solidifying agent, comprising the steps of: (1) using the following parts by weight of each raw material: 45 parts of fine cinder, 20 parts of magnesium oxide, 8 parts of polyferric sulfate, 7 parts of aluminum silicate, 15 parts of perlite 1.5 parts of cationic chelate, 1 part of sodium dodecyl sulfonate, 1 part of calcium hypochlorite, 0.6 part of hydroxypropyl methylcellulose, 0.8 part of modified starch, 0.1 part of dimethylaniline, choose Raw materials, set aside; (2) Fully mix and stir the above-mentioned raw materials in a blender.

[0033] The cationic chelate is formed by chelating ethylenediaminetetraacetic acid (EDTA) and magnesium ions,

[0034] According to the mixing ratio of curing agent and sludge mass ratio of 4%:1, the curing agent is added into the sludge, and then after fully mixing, it can be used after natural drying for 1 hour.

Embodiment 2

[0036] A preparation method of a sludge solidifying agent, comprising the steps of: (1) using the following parts by weight of each raw material: 48 parts of pozzolan, 18 parts of magnesium oxide, 9 parts of polyferric sulfate, 10 parts of aluminum silicate, and 11 parts of perlite 1 part, 1 part of cationic chelate, 0.7 part of sodium dodecyl sulfonate, 0.8 part of calcium hypochlorite, 0.5 part of hydroxypropyl methylcellulose, 0.7 part of modified starch, 0.3 part of dimethylaniline, choose Raw materials, set aside; (2) Fully mix and stir the above-mentioned raw materials in a blender.

[0037] The cationic chelate is formed by chelating tartaric acid (TA) with iron ions.

[0038] Add the curing agent into the sludge according to the mixing ratio of the curing agent and the sludge mass ratio of 5%:1, and then after fully mixing, let it dry and cure naturally for 0.9 hours before use.

Embodiment 3

[0040] A preparation method of a sludge solidifying agent, comprising the following steps: (1) using the following parts by weight of each raw material: 46 parts of coal gangue, 19 parts of magnesium oxide, 10 parts of polyferric sulfate, 9 parts of aluminum silicate, and 11 parts of perlite 1.2 parts of cationic chelate, 0.9 parts of sodium dodecyl sulfonate, 1 part of calcium hypochlorite, 0.6 parts of hydroxypropyl methylcellulose, 0.8 parts of modified starch, 0.5 parts of dimethylaniline, choose Raw materials, set aside; (2) Fully mix and stir the above-mentioned raw materials in a blender.

[0041] The cationic chelate is formed by chelating aminotriacetic acid (NTA) and calcium ions.

[0042] Add the curing agent into the sludge according to the mixing ratio of the curing agent and the sludge mass ratio of 8%:1, and then after fully mixing, it can be used after natural drying and curing for 0.8 hours.

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Abstract

The invention provides a sludge curing agent and its preparation method and application. The sludge curing agent is prepared from the following raw materials in parts by weight: 45-50 parts of iron-calcium-silicon-aluminum oxide, 15-20 parts of magnesium oxide, polymerized 8-10 parts of iron sulfate, 7-12 parts of aluminum silicate, 8-15 parts of perlite, 0.8-1.5 parts of cationic chelate, 0.5-1 part of sodium dodecylsulfonate, 0.5-1 part of calcium hypochlorite 0.4-0.6 parts of hydroxypropyl methylcellulose, 0.2-0.8 parts of modified starch, and 0.1-0.5 parts of dimethylaniline. 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): C02F11/00C02F11/148C02F11/06C02F101/20C02F101/30
CPCC02F11/004C02F11/008C02F11/06C02F11/14C02F2101/20C02F2101/30C02F2303/02C02F2303/04
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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