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System and method for electrolyzing urea for wastewater treatment and coal liquefaction hydrogen supply

A technology for wastewater treatment and coal liquefaction, applied in the direction of electrolysis process, electrolysis components, cells, etc., to achieve the effects of cost reduction, mild reaction conditions, high environmental protection significance and comprehensive benefits

Pending Publication Date: 2018-08-07
HUANENG CLEAN ENERGY RES INST
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  • Claims
  • Application Information

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  • System and method for electrolyzing urea for wastewater treatment and coal liquefaction hydrogen supply
  • System and method for electrolyzing urea for wastewater treatment and coal liquefaction hydrogen supply

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example 1

[0041] Such as figure 1 and figure 2As shown, urine with a mass content of 2.5% urea enters the filter device A1, the clear liquid enters the waste water storage tank A2, and then enters the anode inlet of the electrolytic cell B1 from the outlet of the waste water storage tank A2. The composition of the electrolytic solution of the electrolytic cell B1 is: KOH with a mass concentration of 20%, and urea with a mass concentration of 1%. The anode of the electrolytic cell B1 is NiO nanometer material, and the cathode is Ni-Fe alloy material. The electrolysis reaction was carried out at room temperature with a voltage of 0.8V. CO produced by the anode of electrolytic cell B1 2 Absorbed by alkaline electrolyte, N 2 After being collected by the first gas-water separator B2, the treated water is discharged through the liquid outlet of the first gas-water separator B2, and the urea removal rate is 85%. The purity of hydrogen produced by the cathode of electrolytic cell B1 is 99...

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Abstract

The invention discloses a system and a method for electrolyzing urea for wastewater treatment and coal liquefaction hydrogen supply. According to the system and the method, high-content urea in wastewater is oxydatively degraded by virtue of an electrolytic method so as to obtain high-purity hydrogen, and hydrogen is supplied to a coal liquefaction system to generate hydro-liquefaction reaction, so that the clean utilization of coal resources is promoted; the energy consumption of electrolytic hydrogen production can be reduced, and the urea in the wastewater is taken as the raw material, so that the electrolytic hydrogen production cost is further lowered, and the popularization of an environment-friendly and harmless electrolytic hydrogen production manner is promoted; the urea in the wastewater is removed by virtue of the electrolytic method, reaction conditions are mild, the treatment effect is good, and the environmental pollution caused due to NH3 released during the decomposition of the urea can be avoided; and the coupling of urea wastewater treatment and efficient electrolytic hydrogen production is realized, and electrolytically produced hydrogen is applied to a coal liquefaction process, so that the clean and efficient utilization of the coal resources is realized, and the system and the method have a relatively high environmental protection significance and comprehensive benefits.

Description

technical field [0001] The invention relates to the technical fields of hydrogen production and environmental protection, in particular to a system and method for urea electrolysis for wastewater treatment and coal liquefaction for hydrogen supply. Background technique [0002] Urea (CO(NH 2 ) 2 ) is a major component of human and animal urine and an important chemical product. The enrichment of urine or urea lost in industrial production process into water will cause serious pollution to the environment. Common urea treatment methods include biomass degradation, chemical oxidation or high-temperature pyrolysis, etc. These methods often require high equipment investment, harsh treatment environment, expensive treatment chemicals or long treatment periods, which affect the efficiency of the treatment process. economy. In addition, the importance of urea as a hydrogen storage medium is gradually being paid attention to. Urea is stable, non-flammable, non-toxic, and solid ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B1/00C25B9/00C25B9/04
CPCC25B1/00C25B1/04C25B9/00C25B9/65Y02P20/133Y02E60/36
Inventor 闫巍张畅余智勇张欢马军
Owner HUANENG CLEAN ENERGY RES INST
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