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Medical stone based sludge stabilizer as well as preparation method and application thereof

The technology of a stabilizer and medical stone is applied in the field of medical stone-based sludge stabilizer and its preparation, which can solve the problems of small adsorption effect, and achieve the effects of fast stabilization speed, good stabilization effect and simple preparation process.

Inactive Publication Date: 2018-05-18
张亚欣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, medical stone has little adsorption effect on organic matter in sludge.

Method used

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  • Medical stone based sludge stabilizer as well as preparation method and application thereof
  • Medical stone based sludge stabilizer as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In the embodiment of the present invention, a medical stone-based sludge stabilizer comprises the following raw materials: 33 kg of medical stone, 3 kg of formamide, 1 kg of polyoxyethylene ether, 11 kg of polyvinyl alcohol, and 15 kg of water-based polyurethane emulsion.

[0023] Mix polyvinyl alcohol with 8 times its mass of deionized water to prepare a polyvinyl alcohol solution; mix formamide with 11 times its mass of ethanol to prepare a formamide solution. Grind the medical stone and pass it through a 120-mesh sieve, then add polyvinyl alcohol solution, raise the temperature to 85°C and seal and stir at this temperature for 0.5h, the stirring speed is 220r / min, then raise the temperature to 145°C and add polyoxyethylene Ether, then continue to stir at this temperature for 75 minutes, centrifuge and wash to obtain mixture A; the centrifugal speed is 5000r / min, and the centrifugal time is 5min. Mix the water-based polyurethane emulsion with the formamide solution, p...

Embodiment 2

[0025] In the embodiment of the present invention, a medical stone-based sludge stabilizer comprises the following raw materials: 41 kg of medical stone, 7 kg of formamide, 5 kg of polyoxyethylene ether, 19 kg of polyvinyl alcohol, and 25 kg of water-based polyurethane emulsion.

[0026] Mix polyvinyl alcohol with 9 times its mass of deionized water to prepare a polyvinyl alcohol solution; mix formamide with 12 times its mass of ethanol to prepare a formamide solution. Grind the medical stone and pass it through a 150-mesh sieve, then add polyvinyl alcohol solution, raise the temperature to 90°C and seal and stir at this temperature for 0.6h, the stirring speed is 220r / min, then raise the temperature to 150°C and add polyoxyethylene Ether, and then continue to stir at this temperature for 80 minutes, centrifuge and wash to obtain mixture A; the centrifugal speed is 5000r / min, and the centrifugal time is 10min. Mix the water-based polyurethane emulsion and the formamide solutio...

Embodiment 3

[0028] In the embodiment of the present invention, a medical stone-based sludge stabilizer comprises the following raw materials: 35 kg of medical stone, 4 kg of formamide, 2 kg of polyoxyethylene ether, 13 kg of polyvinyl alcohol, and 18 kg of water-based polyurethane emulsion.

[0029] Mix polyvinyl alcohol with 9 times its mass of deionized water to prepare a polyvinyl alcohol solution; mix formamide with 12 times its mass of ethanol to prepare a formamide solution. Grind the medical stone and pass it through a 150-mesh sieve, then add polyvinyl alcohol solution, raise the temperature to 90°C and seal and stir at this temperature for 0.6h, the stirring speed is 220r / min, then raise the temperature to 148°C and add polyoxyethylene Ether, and then continue to stir at this temperature for 78 minutes, centrifuge and wash to obtain mixture A; the centrifugal speed is 5000r / min, and the centrifugal time is 10min. Mix the water-based polyurethane emulsion and the formamide solutio...

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Abstract

The invention discloses a medical stone based sludge stabilizer as well as a preparation method and an application thereof. The medical stone based sludge stabilizer comprises raw materials in parts by weight as follows: 33-41 parts of medical stone, 3-7 parts of formamide, 1-5 parts of polyoxyethylene ether, 11-19 parts of polyvinyl alcohol and 15-25 parts of waterborne polyurethane emulsion. Themedical stone is ground, a polyvinyl alcohol solution is added, heating and sealed stirring are performed, polyoxyethylene ether is added, the mixture is stirred, centrifugal separation and washing are performed, and a mixture A is prepared; the waterborne polyurethane emulsion and a formamide solution are mixed, heated and stirred in a closed manner, the mixture A is added, stirring, ultrasonicprocessing, drying and calcination are performed, and the product is obtained. The medical stone based sludge stabilizer has a good stabilizing effect on pollutants of heavy metals (copper, lead, zinc, nickel and chromium) and organic matter (hexachlorobenzene, benzo[a]pyrene and benzo(b)fluoranthene) in sludge, is high in stabilizing speed, small in feeding amount and good in stabilizing effect,and leaching toxicity of polluted sludge is reduced.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a medical stone-based sludge stabilizer and its preparation method and application. Background technique [0002] Industrial enterprises will produce a large amount of sludge containing heavy metals and organic substances in the production process, and the final products of sewage treatment in urban sewage treatment plants also contain a large amount of heavy metals and organic substances. Heavy metals and organic substances in polluted rivers and lakes have undergone long-term physical and chemical processes. and biological processes end up in sediments. These sediments and sludges containing heavy metals and organic matter are faced with an urgent need for safe treatment. Safe, fast and efficient treatment of them is one of the key and research topics in the field of environmental governance and protection. It is also a hot topic in this field at present. Stable curi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F101/20C02F101/30
CPCC02F11/008C02F2101/20C02F2101/30
Inventor 张亚欣
Owner 张亚欣
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