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Resource utilization of waste water containing phenol and sodium sulfate and treating method

A treatment method, sodium sulfate technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem that valuable components cannot be fully utilized, increase production costs, Increase the treatment cost and other issues to achieve the effect of simple process operation and treatment, low cost, and reduced wastewater discharge

Inactive Publication Date: 2012-10-17
扬州大学江都高端装备工程技术研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] If the wastewater is directly discharged, on the one hand, the valuable components in the wastewater cannot be fully utilized, resulting in a large waste of resources and increasing production costs; on the other hand, it will cause serious environmental pollution.
If harmless treatment is carried out alone, the treatment cost will be greatly increased. The high treatment cost and extremely low cost performance make it difficult to apply harmless treatment alone in practice.

Method used

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  • Resource utilization of waste water containing phenol and sodium sulfate and treating method

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Effect test

Embodiment 1

[0033] The main process equipment is sedimentation solid-liquid separation device, heat pump evaporation concentration equipment, cooling crystallization equipment, evaporation drying equipment, etc.

[0034] A method for resource utilization and treatment of wastewater containing phenol and sodium sulfate is a method for treating wastewater containing 0.1% to 2.0% phenol and 5% to 30% sodium sulfate, and recycling phenol and sodium sulfate. The method steps as follows:

[0035] (1) Adjust pH value: at 1m 3 Add pH regulator sodium hydroxide to wastewater containing 1kg of phenol and 50kg of sodium sulfate, adjust the pH to 10, so that the phenol in the material reacts with sodium hydroxide to form sodium phenol, and the material goes to the next step;

[0036] (2) Evaporation and concentration: the material obtained in the previous step is evaporated and concentrated. In the heat pump evaporation and concentration equipment, heat pump technology is used to compress the evaporated and...

Embodiment 2

[0045] The main process equipment is filtration type solid-liquid separation device, heat pump evaporation concentration equipment, cooling crystallization equipment, evaporation drying equipment, etc.

[0046] A method for resource utilization and treatment of wastewater containing phenol and sodium sulfate is a method for treating wastewater containing 0.1% to 2.0% phenol and 5% to 30% sodium sulfate, and recycling phenol and sodium sulfate. The method steps as follows:

[0047] (1) Adjust pH value: at 1m 3 Add the pH regulator sodium hydroxide to the wastewater containing 20kg phenol and 200kg sodium sulfate, adjust the pH to 12, so that the phenol in the material reacts with sodium hydroxide to form sodium phenate, and the material goes to the next step;

[0048] (2) Evaporation and concentration: the material obtained in the previous step is evaporated and concentrated. In the heat pump evaporation and concentration equipment, heat pump technology is used to compress the evapora...

Embodiment 3

[0057] The main process equipment is centrifugal solid-liquid separation device, heat pump evaporation and concentration equipment, cooling crystallization equipment, evaporation drying equipment, etc.

[0058] A method for resource utilization and treatment of wastewater containing phenol and sodium sulfate is a method for treating wastewater containing 0.1% to 2.0% phenol and 5% to 30% sodium sulfate, and recycling phenol and sodium sulfate. The method steps as follows:

[0059] (1) Adjust pH value: at 1m 3 Add pH regulator sodium hydroxide to wastewater containing 5kg of phenol and 300kg of sodium sulfate, adjust the pH to 11, so that the phenol in the material reacts with sodium hydroxide to form sodium phenate, and the material goes to the next step;

[0060] (2) Evaporation and concentration: the material obtained in the previous step is evaporated and concentrated. In the heat pump evaporation and concentration equipment, heat pump technology is used to compress the evaporated...

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Abstract

The invention relates to resource utilization of waste water containing phenol and sodium sulfate and a treating method, and especially to a method of treating waste water containing 0.1% to 2.0% of phenol and 5% to 30% of sodium sulfate and recycling phenol and sodium sulfate. The method comprises the following steps: (1) pH value adjusting; (2) evaporative concentration; (3) cooling and crystallization; (4) solid-liquid separation; (5) pH value adjusting; (6) evaporation and drying; (7) condensation; (8) pH value adjusting; (9) evaporation and drying. The method enables sodium phenolate anda byproduct of sodium sulfate to be obtained simultaneously. The invention has the advantages of a reasonable process, a simple method, environmental protection, energy consumption, low operational cost, good product quality and a high utilization rate of valuable components.

Description

technical field [0001] The invention belongs to the field of environmental chemical industry, in particular to a resource utilization and treatment method for waste water containing phenol and sodium sulfate. Background technique [0002] Wastewater containing phenol and sodium sulfate is a typical phenolic wastewater in the chemical industry. Using benzene as raw material, the process of producing phenol through sulfonation and alkali fusion will produce wastewater containing phenol and sodium sulfate; in the process of producing sebacic acid with castor oil as raw material, phenol as a diluent and catalyst will also produce waste water containing Wastewater of phenol and sodium sulfate. [0003] If the wastewater is directly discharged, on the one hand, the valuable components in the wastewater cannot be fully utilized, resulting in a large waste of resources and increasing production costs; on the other hand, it will cause serious environmental pollution. If the detoxif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10C01D5/00C07C39/04C07C37/66
Inventor 王雅琼张小兴陈新雨孙剑许文林
Owner 扬州大学江都高端装备工程技术研究所