Polymer for sludge dewatering and preparation process thereof

A sludge dewatering and polymer technology, applied in dewatering/drying/concentrating sludge treatment and other directions, can solve the problems of secondary environmental pollution and achieve the effects of less dosage, good performance and simple equipment

Active Publication Date: 2008-05-07
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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  • Polymer for sludge dewatering and preparation process thereof
  • Polymer for sludge dewatering and preparation process thereof
  • Polymer for sludge dewatering and preparation process thereof

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 of disodium edetate (chemically pure), control the reaction temperature at 30°C, add 1000mL of formaldehyde (chemically pure) and 1.5kg of sodium bisulfite (chemically pure) into the reactor, and the reaction time is 4h. Finally, add 500mL hydrochloric acid (chemically pure) to stop the reaction, and this product can be obtained. polymer-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), control the reaction temperature at 50°C, add 2200mL of formaldehyde (chemically pure) and 2.0kg of sodium bisulfite (chemically pure) into the reactor, and the reaction time is 3h. Finally, add 1500mL hydrochloric acid (chemically pure) to stop the reaction, and this product can be obtained. polymer-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 of disodium edetate (chemically pure), control the reaction temperature at 45°C, add 2500mL of formaldehyde (chemically pure) and 5.0kg of sodium bisulfite (chemically pure) into the reactor, and the reaction time is 3h. Finally, add 2000mL hydrochloric acid (chemically pure) to stop the reaction, and this product can be obtained. Polymer-3.

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Abstract

The invention relates to a polymer for sludgy dehydration, colloidal water solution with sulfonated methyl polyarylamide as a main element obtained by using negative ion or non-ion polyacrylamide, formaldehyde, sodium bisulfite, and fresh water as raw materials, added with a small amount of auxiliary agent to react under a certain temperature. The invention has the advantages of simple technology and device, stable reaction process and easy operation. The polymer for sludgy dehydration can have better effect by being cooperated with the organic flocculant of Chinese patent 98121074.0 for using. Approved by the sludgy dehydration experiment of refinery, the polymer for sludgy dehydration of the invention has better disposal effect than exported agent under the condition of having same agent putting quantity. The filtrated solution through processing is basically lower than 2000mg/L, and the oil content is below 1000mg/L. The invention can be applicable for sewage and sludge processing in the fields of oil and chemical industry.

Description

technical field [0001] The invention relates to a polymer for sludge dewatering and a preparation method thereof, in particular to a composite sludge dewatering agent and a preparation method thereof, especially for polymers and polymers used for oily sludge dehydration in petroleum and chemical industries. 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 particles, and the mixture o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/14
Inventor 王有华杨丽
Owner CHINA PETROLEUM & CHEM CORP
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