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Method for treating wastewater produced in process for directly liquefying coal

A technology of direct coal liquefaction and treatment method, which is applied in the field of treatment of direct coal liquefaction wastewater, can solve the problems of low treatment efficiency and complicated treatment process of direct coal liquefaction wastewater, and achieves the effect of improving treatment efficiency and simple process

Active Publication Date: 2012-06-27
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to provide a treatment method for direct coal liquefaction wastewater to solve the technical problems of complex treatment process and low treatment efficiency in the prior art

Method used

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  • Method for treating wastewater produced in process for directly liquefying coal
  • Method for treating wastewater produced in process for directly liquefying coal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Catalyst preparation: take TiSO 4 And ZrSO 4 40 grams each, dissolved in 1000ml distilled water to make a solution, add ammonia water to the solution with stirring until the pH value is 10, and then filter and repeatedly rinse the filter cake with deionized water to SO in the rinse solution 4 2- When the concentration is less than 0.1ppm, the obtained filter cake is extruded and formed, then the temperature is programmed (10℃ / min) to 120℃, kept for 10 hours, and then heated to 700℃ at the same programmed temperature rate, and it is made after high temperature roasting for 10 hours. TiO 2 -ZrO 2 The composite oxide carrier is prepared by using the soluble salt of the corresponding active components (Cu, Mn, La, Co) to make an aqueous solution, which is loaded on the prepared composite carrier by an equal volume impregnation method, and each active component is loaded The amount is Cu 6%, Mn 2%, La 2%, Co 1%. Subsequently, the temperature was programmed (10°C / min) to 120°C ...

Embodiment 2

[0033] Preparation of catalyst: Take 60 grams of TiSO 4 And 20 grams of ZrSO 4 , Dissolved in 1000ml of distilled water to make a solution, add ammonia water to the solution with stirring until the pH value is 10, then filter and repeatedly rinse the filter cake with deionized water to SO in the rinse solution 4 2- When the concentration is less than 0.1ppm, the obtained filter cake is extruded and formed, then the temperature is programmed (10℃ / min) to 120℃, kept for 10 hours, and then heated to 700℃ at the same programmed temperature rate, and it is made after high temperature roasting for 10 hours. TiO 2 -ZrO 2 The composite oxide carrier is prepared by using the soluble salt of the corresponding active components (Cu, Mn, La, Co) to make an aqueous solution, which is loaded on the prepared composite carrier by an equal volume impregnation method, and each active component is loaded The amount is Cu 6%, Mn 2%, La 2%, Co 1%. Subsequently, the temperature was programmed (10°C / m...

Embodiment 3

[0037] Preparation of catalyst: Take 60 grams of TiSO 4 And 20 grams of ZrSO 4 , Dissolved in 1000ml of distilled water to make a solution, add ammonia water to the solution with stirring until the pH value is 10, then filter and repeatedly rinse the filter cake with deionized water to SO in the rinse solution 4 2- When the concentration is less than 0.1ppm, the obtained filter cake is extruded, and then the temperature is programmed (10°C / min) to 120°C, kept for 10 hours, and then the temperature is raised to 800°C at the same programmed temperature rate, and the product is calcined at high temperature for 10 hours. TiO 2 -ZrO 2 The composite oxide carrier is prepared by using the soluble salt of the corresponding active components (Cu, Mn, La, Ni, Fe) to make an aqueous solution, and load it on the prepared composite carrier by an isometric impregnation method. The partial load is Cu 5%, Mn 3%, La 2%, Ni 2%, Fe 1%. Subsequently, the temperature was programmed (10°C / min) to 120...

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Abstract

The invention discloses a method for treating wastewater produced in a process for directly liquefying coal. The method for treating the wastewater comprises the following steps of: treating wastewater produced in the process for directly liquefying the coal by a catalytic wet air oxidation method to obtain wastewater subjected to primary treatment; and performing secondary treatment on the wastewater subjected to primary treatment by a biological oxidation method. According to the method for treating the wastewater produced in the process for directly liquefying the coal, the wastewater produced in the process for directly liquefying the coal is treated by the catalytic wet air oxidation method, so the chemical oxygen demand (COD) removal rate of the wastewater can reach over 80 percent, phenol, aldehyde and other substances which have the toxic effects on microorganisms can be oxidized into micromolecule carboxylic acid and other substances which can be decomposed by the microorganisms easily, and wastewater which is further subjected to biological oxidation can be discharged under the condition of meeting the standard. The method is simple, the wastewater produced in the process for directly liquefying the coal can be treated in a centralized and unified way, and independent treatment is not required; and therefore, treatment efficiency is greatly improved.

Description

Technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method for treating wastewater from direct coal liquefaction. Background technique [0002] Coal chemical industry, especially coal direct liquefaction, and other industrial processes usually produce high COD acidic wastewater containing more hydrogen sulfide, high ammonia nitrogen and phenol. This acidic wastewater mainly includes coal liquefaction, coal hydrogen production, hydrorefining, hydrocracking and sulfur Sulfur-containing and phenol-containing wastewater discharged from recovery equipment. The composition of these sewage is more complex than that of industrial processes such as petroleum refining and petrochemical industry. For example, the phenol content is high, up to 10,000 ppm, and the total concentration of hydrogen sulfide and ammonia varies greatly, ranging from 30,000 ppm to 90,000 ppm, so it is treated It is more difficult, and if not handled in tim...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/02C02F1/72C02F1/74
Inventor 孙延辉蔡丽娟葛德禹
Owner CHNA ENERGY INVESTMENT CORP LTD
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