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Treatment method of coking distilled ammonia wastewater and heterogeneous Fenton catalyst used in treatment method

A technology for heterogeneous Fenton and ammonia distillation wastewater, which is applied in special compound water treatment, oxidized water/sewage treatment, physical/chemical process catalysts, etc. It can solve the problems of low pollutant removal efficiency, low chemical utilization rate, and operating costs Advanced problems, to achieve the effects of high catalytic activity, good stability and cycle performance, and low operating costs

Pending Publication Date: 2022-03-15
华夏碧水环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] This method requires complex processes and relatively high operating costs, and the homogeneous catalytic reaction is used in the Fenton oxidation process, which has low utilization rate of chemicals and low pollutant removal efficiency.

Method used

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  • Treatment method of coking distilled ammonia wastewater and heterogeneous Fenton catalyst used in treatment method
  • Treatment method of coking distilled ammonia wastewater and heterogeneous Fenton catalyst used in treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Preparation of Dipotassium Hydrogen Sulfate Modified Zeolite

[0062] 1) Add 80 mL of deionized water to 20 g of ZSM-5 zeolite (20 mesh), heat to 70-90° C., and add dropwise 30 g of dipotassium hydrogen phosphate solution with a mass fraction of 25 wt % under stirring.

[0063] 2) Continue heating until the liquid is completely evaporated; dry at 95-100° C. to obtain dipotassium hydrogen phosphate modified zeolite.

[0064] Preparation of Heterogeneous Fenton Catalysts

[0065] (1) Take an appropriate amount of ferric chloride, copper sulfate, manganese sulfide, titanium chloride and deionized water, and equip the molar concentration ratio of iron, copper, manganese and titanium salts with a ratio of 10:3:1:1, and the total amount of metal salts A mixed solution of metal salts with a mass fraction of 25%.

[0066] (2) Take 20 g of the above-mentioned dipotassium hydrogen phosphate modified zeolite, immerse it in 50 g of the above-mentioned metal salt solution, rea...

Embodiment 2

[0077] Other conditions and operations are the same as in Example 1, except that the molar concentration ratio of iron, copper, manganese, and titanium salts in step (2) is 10:3:0.5:0.5.

Embodiment 3

[0079] Other conditions and operations are the same as in Example 1, except that the molar concentration ratio of iron, copper, manganese, and titanium salts in step (2) is 10:4:0.5:0.5.

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Abstract

The invention provides a treatment method of coking distilled ammonia wastewater and a heterogeneous Fenton catalyst used thereof.The preparation method of the catalyst comprises the following steps that 1, dipotassium phosphate modified zeolite is immersed in a metal salt solution, and stirring is conducted for 1-2 h to form a mixed solution; (2) standing the mixed solution at normal temperature for 18-36 hours to complete impregnation; and (3) drying at 100-120 DEG C, calcining for 3-5 hours at 300-450 DEG C under a nitrogen protection condition, and cooling to room temperature. The catalyst disclosed by the invention is high in catalytic activity, high in reaction rate and low in mud yield, and the zeolite carrier is modified by dipotassium phosphate, so that the catalyst has better stability and cycle performance. In addition, according to the treatment method of the coking ammonia distillation wastewater provided by the invention, organic matters which are difficult to biodegrade in the wastewater are removed by virtue of the synergistic effect of homogeneous and heterogeneous Fenton reactions which are simultaneously carried out, so that the biodegradability of the wastewater is improved.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to a treatment method for coking ammonia distillation wastewater and a heterogeneous Fenton catalyst used. Background technique [0002] Coking wastewater mainly comes from coking, gas purification, and refining processes of chemical products. It is wastewater containing high concentrations of phenol, cyanide, oil, ammonia nitrogen, and toxic and harmful organic substances. The residual ammonia water is the main source. According to statistics, the amount of residual ammonia water is about It accounts for more than half of the total coking wastewater. [0003] The remaining ammonia water in the coking industry is the main industrial wastewater produced by coking enterprises. It has complex components and is difficult to degrade. It is mainly formed after the ammonia contained in the reaction of nitrogen and hydrogen contained in the raw coal is dissolved in the water ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/48C02F1/72C02F9/04C02F101/10C02F101/16C02F101/18C02F101/30
CPCB01J29/48C02F1/722C02F1/725C02F9/00C02F1/66C02F1/24C02F1/40C02F1/5236C02F2305/026C02F2001/007C02F2101/18C02F2101/101C02F2101/30C02F2101/16C02F2209/08C02F2209/06C02F2209/44
Inventor 张传兵郭丽娟王慧芳赵曙光王天杰张真康健韦云钊万家虎赵尚民乔丙林罗帅余义东张硕张旭东
Owner 华夏碧水环保科技股份有限公司