Preparation method and application of oily sludge composite curing material

A technology for solidifying materials and sludge, applied in chemical instruments and methods, sludge treatment, solid fuel, etc., can solve the problems of frequent operation and maintenance, large power consumption, and high operating cost of electro-osmosis drying technology, and achieve sufficient quantity , short processing cycle, stable structure and properties

Pending Publication Date: 2021-03-12
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Superheated steam injection technology is relatively cleaner and more efficient, but due to high operating costs, it is still in the promotion stage
Microwave drying technology requires less equipment and occupies a small area, but consumes a lot of power
Electro-osmotic drying technology is frequently operated and maintained, and the cost is high, and the operating parameters of different types of oily sludge will also change, so it is only used in a small area

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A method for preparing a composite solidified material for oily sludge reduction and resource recovery:

[0042]1. Fully mix gypsum, diatomite, bentonite, and hydrotalcite with mechanical stirring for 4 hours to prepare a modifier for use. The mass fraction of the four materials is (60%, 20%, 15%, 5%), and the bentonite is selected from sodium There are two types of bentonite and sodium bentonite;

[0043] 2. Mix polyacrylamide, carboxymethyl cellulose, and rhamnolipid, stir in the reactor for 3 hours, dry and granulate at 80°C to prepare the flocculant for collection, and the mass fraction of the three materials is (70%, 25%, 5%), wherein the polyacrylamide is two kinds of non-ionic and cationic polyacrylamide;

[0044] 3. The modifying agent and flocculant prepared in steps 1 and 2 are fully mixed with auxiliary materials and demulsifiers and mechanically stirred for 12 hours to obtain a composite solidified material and collected for subsequent use, wherein auxiliar...

Embodiment 2

[0049] A method for preparing a composite solidified material for oily sludge reduction and resource recovery:

[0050] 1. Fully mix gypsum, diatomaceous earth, bentonite, and hydrotalcite with mechanical stirring for 3 hours to prepare a modifier for use. The mass fraction of the four materials is (70%, 15%, 10%, 5%), and bentonite can be used Sodium bentonite, lithium bentonite and lithium bentonite;

[0051] 2. Mix polyacrylamide, carboxymethyl cellulose, and rhamnolipid, stir in the reactor for 4 hours, dry and granulate at 80°C to prepare the flocculant for collection, and the mass fraction of the three materials is (70%, 23.5%, 6.5%), in which polyacrylamide is two kinds of non-ionic and anionic polyacrylamide;

[0052] 3. Fully mix the modifier and flocculant prepared in steps 1 and 2 with auxiliary materials and demulsifiers and mechanically stir for 18 hours to prepare a composite cured material for collection. The demulsifier selected is AE type polyoxyethylene poly...

Embodiment 3

[0057] Preparation method and application of a composite solidified material for oily sludge reduction and resource recovery

[0058] 1. Fully mix gypsum, diatomaceous earth, bentonite and hydrotalcite with mechanical stirring for 6 hours to prepare a modifier for use. The mass fraction of the four materials is (55%, 28%, 8%, 9%), and bentonite can be used Sodium bentonite, lithium bentonite and lithium bentonite;

[0059] 2. Mix polyacrylamide, carboxymethyl cellulose, and rhamnolipid, stir in the reactor for 5 hours, dry and granulate at 80°C to prepare the flocculant for collection, and the mass fraction of the three materials is (66%, 22%, 12%), in which polyacrylamide is two kinds of non-ionic and anionic polyacrylamide;

[0060] 3. The modifying agent and flocculant prepared in steps 1 and 2 are fully mixed with auxiliary materials and demulsifiers and mechanically stirred for 10 hours to obtain a composite solidified material and collected for subsequent use, wherein a...

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Abstract

The invention discloses a preparation method and application of an oily sludge composite curing material. The oily sludge composite curing material is prepared from the following components by mass percentage: 50-80% of auxiliary materials, 10-30% of a modifier, 5-20% of a flocculating agent and 5-15% of a demulsifying agent; and the auxiliary materials, the modifier, the flocculating agent and the demulsifying agent are fully mixed and stirred for 4-48h to prepare the oily sludge composite curing material. The novel oil sludge curing material developed by the invention presents dehydration modification multifunctionalization, the preparation process is simple, the preparation cost is low, oil sludge dehydration and oil sludge curing can be realized in a short time at normal temperature, the cured material can be used as a solid fuel to provide energy, and the reduction and recycling of the material are effectively realized. The material has a wide oil sludge treatment prospect and strong market competitiveness.

Description

technical field [0001] The invention belongs to the field of new materials for oily sludge hazardous waste treatment, and relates to a preparation method and application of an oily sludge composite solidified material, in particular to a composite solidified material for oily sludge reduction and resource recovery. Background technique [0002] In recent years, with the rapid development of the petroleum industry, the by-products produced have increased greatly, and the resulting oily sludge needs to be effectively disposed of. The composition of oily sludge is complex, generally composed of water (above 80wt.%), aged crude oil, asphaltene, suspended solids, bacterial matter, and heavy metal salts such as iron, chromium, and copper, and presents severe emulsification, high viscosity, and difficulty in sedimentation and dehydration Features. In addition, oily sludge also contains a large amount of toxic and harmful refractory organic substances such as benzene series, phenol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/148C10L5/46
CPCC02F11/008C02F11/148C10L5/46Y02E50/10Y02E50/30
Inventor 刘璧铭武海霞
Owner NANJING TECH UNIV
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