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Pretreatment device and method for colored crystal synthesis wastewater

A pretreatment device and mixed wastewater technology, applied in the field of wastewater treatment, can solve the problems of weakened reduction, blockage of iron-carbon bed, hardening, etc., and achieve the effect of improving the effect and reducing the load of biochemical treatment

Active Publication Date: 2015-04-29
CHINA NORTH ENERGY CONSERVATION & ENVIRONMENT PROTECTION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] When conventionally designing iron-carbon micro-electrolysis devices, only the residence time of wastewater in the device (i.e., the reduction time of difficult-to-biochemical organic compounds) is considered, ignoring that the micro-electrolysis device must maintain a low acidity during the entire reduction process. As the process continues, the pH value gradually increases, the acidity gradually decreases, the reduction effect gradually weakens, and the reduction efficiency of the compound decreases continuously, resulting in Fe(OH) 3 Precipitation, resulting in blockage or compaction of the iron-carbon bed

Method used

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  • Pretreatment device and method for colored crystal synthesis wastewater

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Embodiment

[0037] Taking the high- and low-concentration waste water produced by the color crystal synthesis workshop of a factory as the treatment object, the device and method of the present invention are used to pretreat the above-mentioned synthetic waste water. The specific treatment process is as follows:

[0038] 1) The high-concentration wastewater containing tetrahydrofuran produced in the color crystal synthesis process is discharged into the adjustment tank 1, and the low wastewater is discharged into the adjustment tank 2. The two adjustment tanks are aerated and stirred at the same time. The air-water ratio of the aeration and agitated is 2: 1. The residence time is more than 8 hours;

[0039] 2) After aeration and stirring in the first step, the wastewater in the two regulating tanks is discharged into the coagulation sedimentation tank 1 according to the volume ratio of high-concentration wastewater to low-concentration wastewater 1:9 through the water pump, and the high-co...

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Abstract

The invention relates to a pretreatment device and method for colored crystal synthesis wastewater, and belongs to the field of wastewater treatment. The pretreatment device comprises two regulating tanks, two coagulating precipitation tanks, two intermediate tanks and two ferric carbon reaction tanks. The pretreatment method comprises the following steps: firstly, homogenizing and averaging high-concentration and low-concentration wastewater through the two regulating tanks; secondly, carrying out coagulating precipitation, acid modulation treatment and internal electrolysis treatment; thirdly, carrying out acid modulation treatment and internal electrolysis treatment again; finally, carrying out coagulating precipitation again. The wastewater pretreated by the device and the method can meet the biochemical treatment requirements.

Description

technical field [0001] The invention relates to a pretreatment device and method for colored crystal synthetic wastewater, belonging to the field of wastewater treatment. Background technique [0002] Caijing Synthesis Enterprise is a relatively serious polluting enterprise. Tetrahydrofuran (THF) is used as an organic solvent in the production process, and the main component of the discharged wastewater is THF. [0003] THF is an important organic chemical raw material. It has the advantages of low toxicity, low boiling point, and good fluidity. It is widely used as a reactive solvent and is known as a "universal solvent". It is also widely used in the processing and production of synthetic resins and natural resins to produce engineering plastics, thermosetting and thermoplastic elastomers, tanning, pharmaceutical intermediates, adhesives and various organic chemical reactions. The pollution caused by the production of tetrahydrofuran or other chemical products with tetrah...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06
CPCC02F1/461C02F1/46104C02F1/56C02F1/66C02F9/00C02F2101/34C02F2301/08
Inventor 文传选孟庆海楚素珍顾振华姜鑫林毅马迁王新辛立平崔剑贺雄
Owner CHINA NORTH ENERGY CONSERVATION & ENVIRONMENT PROTECTION
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