Oily sludge concentrating agent as well as preparation and application thereof

A sludge concentration and thickener technology, which is applied in the direction of dehydration/drying/concentrated sludge treatment, etc., can solve the problems of poor concentration effect, slow sedimentation speed, and large dosage of chemicals, and achieve convenient dosing, fast sedimentation speed, and less effect

Active Publication Date: 2011-05-11
PETROCHINA CO LTD +2
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  • Summary
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  • Description
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AI Technical Summary

Problems solved by technology

In the existing sludge concentration technology, lime and PAM are generally used for sludge concentration treatment of oily sludge. The disadvantages of this method are: 1. The concentration effect is poor; 2. The sedimentation speed is slow; 3. The dosage of chemicals is large , high cost and long period; 4. When dosing, it needs to be added in sections, and the process is cumbersome

Method used

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  • Oily sludge concentrating agent as well as preparation and application thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0013] Use 425# slag cement, 160-mesh fly ash powder, diatomaceous earth and polyaluminum according to the ratio of 1:0.8:0.8:0.0125 to mix and stir until uniform to prepare 1# high-efficiency oily sludge thickener. See Table 1 for the experimental data.

Embodiment 2

[0015] Use 425# Portland cement, 200-mesh fly ash powder, diatomaceous earth and polyaluminum according to the ratio of 1:1.5:1:0.02 to mix and stir until uniform to prepare 2# high-efficiency oily sludge thickener. See Table 1 for the experimental data.

Embodiment 3

[0017] Use 425# slag cement, 250-mesh fly ash powder, diatomaceous earth and polyaluminum according to the ratio of 1:1.5:1.5:0.03 to mix and stir until uniform to prepare 3# high-efficiency oily sludge thickener. See Table 1 for the experimental data.

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Abstract

The invention relates to an oily sludge concentrating agent as well as preparation and application thereof. The oily sludge concentrating agent comprises cement, fly ash, diatomite and polyaluminum, wherein the proportion by mass of the cement, the fly ash, the diatomite and the polyaluminum is 1:(0.5-2.5):(0.5-2.5):(0.005-0.05); and a production method of the oily sludge concentrating agent comprises the following steps of: firstly grinding the fly ash into fly ash powder in 100-300 meshes, mixing with the diatomite in 100-300 meshes, the cement in 100-300 meshes and the polyaluminum in 100-300 meshes according to the proportion by mass and uniformly stirring. Oil, water and sludge can be thoroughly separated by adding 0.5-1.5 percent by mass of oily sludge concentrating agent into oily sludge containing 99 percent of water; and the oily sludge concentrating agent has the advantages of high settling velocity, good sludge concentrating effect, less dosage, low cost and convenience in feeding.

Description

technical field [0001] The invention relates to an oily sludge thickener and its preparation and application. Background technique [0002] In the oily sewage treatment system, a large amount of oily sludge will be produced through conventional sewage treatment processes such as sedimentation, filtration, and air flotation. The treatment of oily sludge generally includes three parts: the first step is the concentration of sludge, and the second step is Drying, the third step is harmless treatment. [0003] As an important link in sludge treatment, oily sludge thickening plays an important role in sludge treatment. Sludge concentration generally concentrates the oily sludge with a water content of 97-99% to 85-97%, reduces the volume of the oily sludge by 3-5 times, and then performs subsequent treatment. In the existing sludge concentration technology, lime and PAM are generally used for sludge concentration treatment of oily sludge. The disadvantages of this method are: 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/14
Inventor 魏云峰邓华江杨翔蒋幕伟赵顶李青李旭光王福善于涛徐淑英孙广森
Owner PETROCHINA CO LTD
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