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A method for preparing lightweight ceramsite by using oil sludge and solid waste as a resource

A lightweight ceramsite, resource-based technology, applied in chemical instruments and methods, applications, ceramic products, etc., to achieve the effect of reducing preparation costs, simple processing technology, and small equipment scale

Active Publication Date: 2019-01-22
SHAANXI YANCHANG PETROLEUM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although there are existing methods of using industrial or municipal sludge as raw materials to prepare lightweight ceramsite, some types of traditional Chinese medicine add expansion agents and other additives, and the prepared lightweight ceramsite is basically ultra-light density ceramsite or general Density ceramsite, its density is greater than 300 kg / m 3

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Take the oily sludge at the bottom of the crude oil sedimentation tank at an oil production plant in northern Shaanxi as an example. Its initial water content is 40%, organic matter content is 35%, and mud content is 25%. The specific treatment methods are as follows:

[0029] The sludge after chemical conditioning and centrifugal dehydration reduction treatment is used as the material for preparing lightweight ceramsite, and the material is sent to the upper sludge hopper of the rake furnace of the integrated mixing-granulation-calcination reactor and passes through the feeding The screw and the feed pipe enter the mixing and granulation section of the rake furnace; the kerosene co-refining residue is sent to the powder hopper above the rake furnace of the mixing-granulation-calcination integrated reactor, and passes through the feeding screw and the feed pipe Into the mixing and granulation section of the rake furnace; the mass ratio of sludge and kerosene co-refining res...

Embodiment 2

[0035] Take the ground oil sludge from an oil production plant in northern Shaanxi as an example. Its initial water content is 20%, organic matter content is 55%, and mud content is 25%. The specific treatment methods are as follows:

[0036] The sludge after chemical conditioning and centrifugal dehydration reduction treatment is used as the material for preparing lightweight ceramsite, and the material is sent to the upper sludge hopper of the rake furnace of the integrated mixing-granulation-calcination reactor and passes through the feeding The screw machine and the feed pipe enter the mixing and granulation section of the rake furnace; the coal gasification, coal liquefaction and kerosene co-refining residues are crushed and sent to the upper powder hopper of the rake furnace in the mixing-granulation-calcination integrated reactor. And enter the mixing granulation section of the rake furnace through the feeding screw and the feed pipe; the mass ratio of sludge: coal gasifica...

Embodiment 3

[0043] Replace the oily sludge in Example 1 of this application with the oil-containing sludge in Application No. 200610091183.8 "A method for producing ceramsite with oil sludge sand as raw material", and use the method of Example 1 of this application for firing (raw material The ratio and processing parameters are the data disclosed in Example 1. As the ceramsite prepared in Comparative Example 1, the ceramsite prepared in Example 1 and Comparative Example 1 were tested, and the results are as follows:

[0044] The ceramsite prepared in Example 1 is tested according to JC487-9, and its bulk density is less than or equal to 280kg / m 3 , Cylinder compressive strength ≧0.7MPa, softening coefficient ≧0.8, water absorption ≦20%, can be used as lightweight aggregate for wall.

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Abstract

The invention relates to a method for preparing lightweight ceramsite by utilizing recycled oily sludge and solid wastes, and provides a method for preparing the lightweight ceramsite by directly utilizing the recycled oily sludge and solid wastes without needing any additive in the preparation process. The method comprises the following steps: (1) carrying out chemical conditioning and centrifugal dehydration reduction treatment on the oily sludge to enable the water content to be less than or equal to 80%; (2) mixing the treated oily sludge with at least one solid waste in crushed coal gasification, coal liquefaction and coal oil co-processing residue, granulating, and calcining, wherein particle sizes of the crushed solid wastes are less than or equal to 10 meshes; (3) after calcination, cooling the mixture to 60-80 DEG C step by step at the cooling rate of 10-20 DEG C to obtain the lightweight microporous ceramsite. The method provided by the invention is simple in treatment process, does not need any additive and realizes resource utilization of the oily sludge and the solid wastes.

Description

Technical field [0001] The invention belongs to the field of processing containing sludge, and particularly relates to a method for preparing light ceramsite by co-resource of oil sludge and solid waste. Background technique [0002] Oily sludge is a kind of stable colloidal system composed of organic matter such as petroleum and water, silt, etc. The organic matter contains heavy crude oil, semi-finished residual oil and refined oil, as well as a large amount of oily thick ring aromatic hydrocarbons and harmful microorganisms. It is harmful to the human body and the environment. It has been listed as a solid hazardous waste (HW08) in my country, and it must be effectively treated and harmless before it can be discharged. At present, the existing methods of treating oily sludge in China can be summarized as follows: incineration, coking, landfilling, land cultivation, solvent extraction, comprehensive utilization of oily sludge, solidification, chemical demulsification and biologi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00C02F11/12C02F11/14C04B38/06C04B33/132
CPCC02F11/00C02F11/127C02F11/14C02F2303/06C04B33/1321C04B33/1328C04B38/009C04B2235/77C04B2235/96Y02P40/60
Inventor 杨东元扈广法齐永红王燕冯成海段志阳刘鹏
Owner SHAANXI YANCHANG PETROLEUM GRP
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