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Method for removing chlorobenzene from original water through combination of blowing-off and powdery carbon adsorption

A powdered carbon and raw water technology, applied in the direction of adsorption water/sewage treatment, chemical instruments and methods, degassed water/sewage treatment, etc., can solve the problem of large dosage, adverse effects of water treatment unit on treatment costs, and chlorobenzene removal capacity Low-level problems, to achieve the effect of reduced processing costs, stable processing effects, and improved safety guarantee rate

Inactive Publication Date: 2012-05-23
HARBIN INST OF TECH
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AI Technical Summary

Problems solved by technology

[0004] In order to solve the emergency treatment of drinking water with sudden chlorobenzene pollution in existing raw water, the present invention adopts the addition of powdered activated carbon. Powdered activated carbon has a low ability to remove chlorobenzene in raw water, and the amount of dosage is large, which will cause adverse effects on subsequent water treatment units. And the problem of high treatment cost, and provide a method of combined removal of chlorobenzene in raw water with air stripping and powder carbon adsorption

Method used

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specific Embodiment approach 1

[0009] Specific embodiment one: the treatment method of this embodiment blowing off and powdered carbon adsorption combined removal of chlorobenzene in raw water is realized according to the following steps: one, air is blown into the raw water polluted by chlorobenzene to carry out blowing off, and the hydraulic retention time is 2 to 30 minutes; 2. Add 20 to 80 mg of powdered carbon to each liter of raw water after stripping, and the adsorption time is 0.2 to 24 hours, that is, to complete the combined removal of chlorobenzene in raw water by stripping and powdered carbon adsorption; the steps The air blown in the first step is dispersed into air bubbles with a diameter of 1-5mm through the aerator, and the air-water volume ratio is 10-50:1; the powdered charcoal in the second step is wood charcoal or coal-based charcoal.

[0010] The concentration of chlorobenzene in the raw water polluted by chlorobenzene in step 1 of this embodiment is 0.3-25 mg / L.

specific Embodiment approach 2

[0011] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the blown air in Step 1 is dispersed into bubbles with a diameter of 2-4 mm through the aerator, and the air-water volume ratio is 20-40:1. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0012] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the blown air in step 1 is dispersed into bubbles with a diameter of 3 mm through the aerator, and the air-water volume ratio is 25:1. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

The invention discloses a method for removing chlorobenzene from original water through combination of blowing-off and powdery carbon adsorption, relating to a method for removing chlorobenzene from original water. The invention solves the problems that powdery active carbon has low chlorobenzene removing capability, high investment, bad influence on subsequent water treatment units and high treatment cost because powdery active carbon is used for emergent water treatment during accident chlorobenzene pollution. The method comprises the following steps: firstly, blowing air into original water polluted by chlorobenzene for blowing off; secondly, adding powdery carbon to the original water after blowing off, and then carrying out mixing and absorption. In the invention, chlorobenzene removal rate is from 95% to 96.5%, the method is simple and feasible, chlorobenzene content in the original water can be quickly and effectively reduced, chlorobenzene treatment effect is stable, carbon addition is low without bad influence on the subsequent water treatment units, and the treatment cost is low; blowing-off and powdery carbon adsorption are used as two safety barriers for accident chlorobenzene pollution to the original water, and the invention improves the safety insurance of the quality of water output from a water plant.

Description

technical field [0001] The invention relates to a method for removing chlorobenzene in raw water. Background technique [0002] Chlorobenzene is a volatile synthetic organic compound. It is a colorless liquid with an aromatic smell. Chlorobenzene is mainly used in the production of styrene, and is widely used as chemical raw materials and solvents. The factories using chlorobenzene are the main source of chlorobenzene in the environment. main source of pollution. Accidents such as vehicle rollover and container rupture during storage and transportation will also cause serious pollution of chlorobenzene, which is one of the important risk pollutants for sudden water quality pollution of urban water sources. [0003] At present, the drinking water emergency treatment method for sudden chlorobenzene pollution in raw water is mainly to add powdered activated carbon to raw water, but it has the following disadvantages: 1. The ability of powdered activated carbon to remove chloro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/02C02F1/28C02F1/20C02F101/36
Inventor 崔福义赵志伟林明利牛畅何皎洁
Owner HARBIN INST OF TECH
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