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Adsorbent for refinery sewage treatment as well as preparation and regeneration methods of adsorbent

A technology for oil refinery sewage and adsorbent, which is applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problems of high bottom resin regeneration efficiency, low top resin regeneration efficiency, and acid solution seepage Slow and other problems, to achieve high anti-hydration ability and chemical stability, long operating cycle, large adsorption effect

Active Publication Date: 2019-08-30
广饶科力达石化科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the acid regeneration tower of the above-mentioned regeneration system is filled with resin, resulting in slow seepage of the acid solution and low regeneration efficiency, and because the acid regeneration tower is a downflow regeneration, the regeneration efficiency of the resin at the bottom is high, and the regeneration efficiency of the resin at the top is low

Method used

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  • Adsorbent for refinery sewage treatment as well as preparation and regeneration methods of adsorbent
  • Adsorbent for refinery sewage treatment as well as preparation and regeneration methods of adsorbent
  • Adsorbent for refinery sewage treatment as well as preparation and regeneration methods of adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Dissolve caustic mud in water and blow CO 2 , reacted for 6 hours, filtered to separate magnesium hydroxide, and dried at 120°C for 2 hours;

[0042] Add 3mol / L hydrochloric acid to the boiler fly ash, stir at 80°C for 6h and filter, add surfactants (SDBS and TEABr, the amount is 0.04 of the mass of the aluminum source) to the raffinate, and then add 2mol / L Sodium hydroxide solution, adjust the pH to 10.5, and co-precipitate; age at 100°C for 12h, filter, wash with deionized water until pH<8, and dry at 100°C for 4h to obtain aluminum-containing hydroxide. Mix according to the mass ratio of magnesium hydroxide and aluminum-containing hydroxide 6:8, add 4% binder citric acid, 3% forming aid scallop powder and appropriate amount of water, knead, shape, stand still, dry, and roast at 520°C After 2 hours, the finished adsorbent was obtained, which was denoted as A-1.

Embodiment 2

[0044] Dissolve caustic mud in water and blow CO 2 , reacted for 6 hours, filtered to separate magnesium hydroxide, and dried at 120°C for 2 hours;

[0045] Add 3mol / L hydrochloric acid to the boiler fly ash, stir at 80°C for 6h and then filter, add magnesium hydroxide (mass ratio of magnesium hydroxide to aluminum hydroxide 6:8) to the raffinate, add surface active agent (SDBS and TEABr, the dosage is 0.04 of the quality of the aluminum source); under stirring, add 2mol / L sodium hydroxide, adjust the pH to 10.5, and co-precipitate; age at 100°C for 12h, filter, and wash with deionized water until the pH< 8. Dry at 100°C for 4 hours to obtain magnesium-aluminum composite hydroxide; 4% binder citric acid, 3% forming aid scallop powder and appropriate amount of water, knead, shape, stand still, dry, and roast at 520°C for 2 hours , and the obtained adsorbent is denoted as A-2.

Embodiment 3

[0047] Dissolve caustic mud in water and blow CO 2 , reacted for 8 hours, filtered to separate magnesium hydroxide, and dried at 120°C for 2 hours;

[0048] Add 3mol / L hydrochloric acid to the gasification fine slag, stir at 60°C for 8h and filter, add magnesium hydroxide (mass ratio of magnesium hydroxide to aluminum-containing hydroxide is 7:8), add surface active agent (SDBS and TPABr, the dosage is 0.05 of the quality of the aluminum source); under stirring, add concentrated ammonia water, adjust the pH to 11.0, and coprecipitate; age at 80°C for 18h, filter, and wash with deionized water until pH<8, 80°C Dry for 12 hours to obtain magnesium-aluminum composite hydroxide; 3% binder citric acid, 3% forming aid safflower powder and appropriate amount of water, knead, shape, stand still, dry, and roast at 500°C for 3 hours, the obtained adsorption The agent is recorded as A-3.

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Abstract

The invention discloses an adsorbent for refinery sewage treatment as well as preparation and regeneration methods of the adsorbent. The adsorbent is specifically prepared as follows: magnesium hydroxide is separated by causticizing mud; an aluminum source is obtained after acid extraction of an aluminum-containing solid waste, a magnesium source and a surfactant are added to a raffinate, and a compound hydroxide is prepared with a coprecipitation method; the adsorbent is taken as an adsorbent for organic matter in the refinery sewage after kneading, forming, drying and calcining; an adsorption regeneration system adopts a programming controller and full radial reactor inlet and outlet four-way valves for cooperation, and the adsorption and regeneration process is automatically controlledaccording to set time and a discharging COD number. The adsorbent provides a utilization way for solid wastes of the coal chemical industry and has the characteristics of high adsorption for organic matter in the refinery sewage, good regeneration performance in an alkaline solution and low probability of pulverization; an adsorption and regeneration system based on the adsorbent is simplified instructure, low in pressure drop, high in treatment capacity, stable to operate and long in operation cycle.

Description

technical field [0001] The invention relates to the field of oil refinery sewage treatment, in particular to an adsorbent for oil refinery sewage treatment and a preparation and regeneration method thereof. Background technique [0002] At present, the chemical oxygen demand (COD) of many oil refining enterprises still exceeds the standard after treatment, which is low-quality sewage. If it is recycled to the system, it will cause certain harm to the operation of the system; if it is discharged directly, it will cause environmental pollution. Therefore, it is necessary to further treat low-quality sewage to effectively reduce the organic waste in it for reuse or direct discharge. [0003] Adsorption is one of the methods of sewage treatment, and choosing the right adsorbent is the key to adsorption technology. At present, the commonly used adsorbents include activated carbon, humic acid, resin, etc., whose synthesis and regeneration costs are relatively high, and their app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/08B01J20/30B01J20/34C02F1/28C02F103/36
CPCB01J20/08B01J20/041B01J20/3475C02F1/281C02F2103/365
Inventor 王晓霞
Owner 广饶科力达石化科技有限公司
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