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Sludge dewatering agent and its preparation method

A sludge dewatering agent and dewatering agent technology, which can be used in dewatering/drying/concentrating sludge treatment, etc., can solve problems such as secondary pollution of the environment, and achieve the effects of simple equipment, stable reaction process and good agglomeration.

Active Publication Date: 2006-05-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method will cause secondary pollution to the environment

Method used

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  • Sludge dewatering agent and its preparation method
  • Sludge dewatering agent and its preparation method
  • Sludge dewatering agent and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In the reactor, add 499kg of fresh water, start stirring, and add 1.1kg of nonionic polyacrylamide. After it was completely dissolved, 0.1 kg of sodium hydroxide (chemically pure) was added to adjust the pH of the solution to 11-12. Then add 0.5g disodium ethylenediaminetetraacetic acid (chemically pure), add 0.8g ammonium persulfate (chemically pure), control the reaction temperature at 30°C, mix 1000mL formaldehyde (chemically pure), 1500mL diethylamine (chemically pure) After mixing, add to the reactor, the reaction time is 4h. Finally, add 1500mL hydrochloric acid (chemically pure) to stop the reaction, and this product can be obtained. Dehydrating agent-1.

Embodiment 2

[0026] In the reactor, add 498kg of fresh water, start stirring, and add 1.35kg of nonionic polyacrylamide. After it is completely dissolved, add 0.17kg of sodium hydroxide (chemically pure) to adjust the pH value of the solution to 9-10. Then add 0.5g disodium edetate (chemically pure), add 1.4gN, N-dihydroxyethyl azobisisobutylamidine hydrochloride (chemically pure), control the reaction temperature at 50°C, and dissolve 2200mL formaldehyde (chemically pure), 1800mL dimethylamine (chemically pure), and 1200mL diethylamine (chemically pure) were mixed and added to the reaction kettle for a reaction time of 3 hours. Finally, add 2500mL hydrochloric acid (chemically pure) to stop the reaction, and this product can be obtained. Dehydrating agent-2.

Embodiment 3

[0028] In the reactor, add 987kg of fresh water, start stirring, and add 2.85kg of anionic polyacrylamide. After it is completely dissolved, add 0.25 kg of sodium hydroxide (chemically pure) to adjust the pH value of the solution to 11-12. Then add 0.4g disodium edetate (chemically pure), add 0.5g ammonium persulfate (chemically pure), add 0.6g N, N-dihydroxyethyl azobisisobutylamidine hydrochloride (chemically pure) , control the reaction temperature at 45°C, mix 2500mL formaldehyde (chemically pure) and 4200mL diethylamine (chemically pure), and add them into the reaction kettle, and the reaction time is 3h. Finally, add 4000mL hydrochloric acid (chemically pure) to stop the reaction, and this product can be obtained. Dehydrating agent-3.

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PUM

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Abstract

The invention relates to a cationic polymer dehydrator for sludge. It is a colloid water solution with am-methyl polyacrylamide as main component, which is prepared by anion or non-ion polyacrylamide, formaldehyde, organic amine and fresh water, reacting at a definite temperature assisted with chelating agent and reaction promoter. The invention is characterized in that the technique and device is simple, the reaction process is stable, and it is easy to operate. Said cationic polymer dehydrator can be more effective cooperated with organic flocculant in Chinese patient 98121074. 0. The test of refinery sludge dehydration shows that the invention is more effective than the import at the same adding-quantity of the agent; COD of treated filtrate is substantially lower than 2000mg / L, and the oil content is lower than 1000 mg / L. It can be used to deal with sewage and sludge in oil and chemical industry.

Description

technical field [0001] The invention relates to a sludge dewatering agent and a preparation method thereof, in particular to a cationic polymer sludge dewatering agent and a preparation method thereof, especially for the cationic polymer dehydration used for oily sludge dehydration in the petroleum and chemical industry agent and its preparation method. Background technique [0002] In the process of petroleum processing and wastewater treatment, a large amount of oily sludge is produced, such as API grease trap bottom sludge, dissolved air flotation scum, electric desalination sewage oil, oil tank bottom sludge and residual activated sludge, etc. Due to the different production processes of oily sludge, there is a large difference in oil and water content. Oil is composed of hundreds of different types of organic compounds, most of which are toxic, harmful and difficult to biodegrade. The solid particles in oily sludge are distributed in the sludge as extremely small parti...

Claims

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Application Information

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IPC IPC(8): C02F11/14
Inventor 王有华杨丽赵景霞黄玉洪
Owner CHINA PETROLEUM & CHEM CORP
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