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Coal-to-oil production wastewater treatment method

A technology for producing wastewater and treatment method, which is applied in the field of wastewater treatment with high phenol content, high COD and high ammonia nitrogen, can solve the problems of difficult wastewater treatment, and achieve the effects of low cost, reasonable design and clear interface

Active Publication Date: 2017-12-12
BLUESTAR LEHIGH ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the treatment of such waste water is extremely difficult

Method used

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  • Coal-to-oil production wastewater treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1, a kind of coal-to-oil production wastewater treatment method, its steps are as follows:

[0023] (1) Oil-separation sedimentation: First, oil-separation sedimentation treatment is carried out on the wastewater to remove slick oil and suspended solids contained in the wastewater;

[0024] (2) Ammonia distillation tower: the waste water treated by oil separation and precipitation is removed through the ammonia distillation tower to remove high-concentration inorganic ammonia nitrogen;

[0025] (3) Acidification: Acidify the wastewater treated with ammonia distillation to adjust the pH value to 1;

[0026] (4) Extraction: Under normal temperature and pressure, the waste water is fully mixed with the extractant according to the volume ratio of the oil-water phase of 4:1. The raffinate phase after stratification is the extraction. After neutralization in water, it enters the first-level A / O biochemical system. The extraction phase is the load extraction. The e...

Embodiment 2

[0031] Embodiment 2, a method for treating wastewater from coal-to-oil production, the steps are as follows:

[0032] (1) Oil-separation sedimentation: First, oil-separation sedimentation treatment is carried out on the wastewater to remove slick oil and suspended solids contained in the wastewater;

[0033] (2) Ammonia distillation tower: the waste water treated by oil separation and precipitation is removed through the ammonia distillation tower to remove high-concentration inorganic ammonia nitrogen;

[0034] (3) Acidification: Acidify the wastewater treated with ammonia distillation to adjust the pH value to 2;

[0035] (4) Extraction: Under normal temperature and pressure, the waste water is fully mixed with the extractant at a volume ratio of 1:8 to the oil-water phase. The raffinate phase after stratification is the extraction, and after neutralization in water, it enters the first-level A / O biochemical system. The extraction phase is the load extraction. The extractio...

Embodiment 3

[0040] Example 3, in step (7) of a coal-to-oil production wastewater treatment method described in Example 1 or 2, the preparation method of the catalyst used in the ozone catalytic oxidation is detailed in the patent "A Preparation Method for Ozone Oxidation Catalyst" .

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Abstract

The invention is a method for treating coal oil wastewater, and the specific method includes the steps of oil separation precipitation, ammonia steaming, extraction, back extraction, primary A / O, ozone catalytic oxidation, secondary A / O and the like. After removing slick oil and suspended solids through oil separation precipitation, the wastewater enters the ammonia distillation device to remove high-concentration ammonia nitrogen in the wastewater, then adjusts the pH value to 1-2 with inorganic acid, and extracts high-concentration phenolic organic matter in the wastewater with a specially selected extraction agent. The extract phase is back-extracted with lye, recycled after regeneration, and the product is recovered from the back-extraction solution. After the raffinate is neutralized, it enters the first-level A / O biochemical system to remove organic matter and ammonia nitrogen. The first-level A / O effluent enters the ozone catalytic oxidation device and then enters the second-level A / O biochemical system. The domesticated and cultivated microorganisms are used for biochemistry. The secondary A / O effluent is discharged up to standard after coagulation and sedimentation. The method of the invention is a combination method of physical chemistry and biochemistry, and the method is reasonable in design and strong in operability.

Description

technical field [0001] The present invention relates to a method for treating high-concentration waste water from coal-to-oil production, specifically a method for treating high-COD, high-phenol, and high-ammonia-nitrogen waste water produced in the process of coal-to-oil production using a combination of physicochemical and biochemical methods. method. Background technique [0002] From the perspective of energy structure, my country is a country with "more coal and less oil and gas". "Rich coal and less oil" is one of my country's energy characteristics. Overreliance on crude oil and petroleum products. Due to the increasing demand for oil, it is an important way to solve the shortage of oil resources in our country by using related technologies to convert coal into refined oil. The "coal-to-oil" technology plays an important role in alleviating the contradiction between China's oil supply and demand, ensuring national energy security, and promoting national economic deve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F101/16C02F101/34C02F101/32C02F103/34
Inventor 杨志林田凤蓉王开春郭涛张彬彬董自斌王克云陈添敏
Owner BLUESTAR LEHIGH ENG INST CO LTD
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