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Method and system for producing hydrogen from landfill leachate

A landfill leachate and hydrogen technology, which is applied in chemical instruments and methods, contaminated groundwater/leachate treatment, water/sludge/sewage treatment, etc., can solve hydrogen waste and other problems, and achieve low operating costs and engineering investment low cost effect

Pending Publication Date: 2021-08-03
DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of this, in order to solve the above-mentioned problems existing in the prior art, the object of the present invention is to provide a method and system for producing hydrogen by using landfill leachate to achieve the use of landfill leachate membrane concentrate to prepare hydrogen for fuel cells, and at the same time co-produce and disinfect The purpose of the agent, and solve the problem of hydrogen waste generated by the traditional electrolysis brine technology

Method used

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  • Method and system for producing hydrogen from landfill leachate
  • Method and system for producing hydrogen from landfill leachate
  • Method and system for producing hydrogen from landfill leachate

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Embodiment 1

[0057] The current membrane concentrate treatment process is mainly a variety of evaporation processes, such as mechanical vapor recompression (MVR), submerged fuel; the operating cost of MVR is 80-120 yuan / m3, and frequent cleaning is required during operation, which cannot run stably ; The operating cost of submerged combustion is 140-260 yuan / m3. The system has high requirements for heat sources, and the construction and operation energy consumption costs are high. Moreover, these evaporation processes are prone to produce hazardous waste of mixed salts that are difficult to handle.

[0058] In view of the defects of the above-mentioned membrane concentrate treatment process, a method for producing hydrogen from landfill leachate is provided in this embodiment. Taking the leachate reverse osmosis membrane concentrate as an example, this method is compatible with other industrial wastewater (such as: leachate ) compared with the reverse osmosis membrane concentrate treatment ...

Embodiment 2

[0080] The present invention also provides a system for producing hydrogen by using landfill leachate. In this embodiment, when the system is working, the raw material used is the leachate reverse osmosis membrane concentrate. For the convenience of transportation and flexible use, the entire device of the system can be assembled and designed as skid-mounted modules. Specifically, such as figure 2 As shown, the system includes:

[0081] ① reverse osmosis device, the inlet end of the reverse osmosis device is connected to raw water;

[0082] ②Advanced ozone oxidation device, the advanced ozone oxidation device is connected to the outlet of the reverse osmosis device and receives the concentrate; under the action of the advanced ozone oxidation device, the COD of the suspended matter in wastewater after advanced ozone oxidation is controlled below 100mg / L .

[0083] ③ electro-adsorption device, the electro-adsorption device is connected with the outlet end of the ozone advan...

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Abstract

The invention discloses a method and a system for producing hydrogen from landfill leachate, and belongs to the technical field of hydrogen production. The method comprises the steps that concentrated liquor produced in a reverse osmosis process flows into a catalytic ozonation process; clear brine generated in the ozone catalytic oxidation process is sent to the electro-adsorption process, strong brine generated in the electro-adsorption process is sent to the electrolysis process, and light brine generated in the electro-adsorption process is returned to the reverse osmosis process; light salt brine and chlorine flow out of the anode of the electrolysis process, and finished alkali and hydrogen flow out of the cathode of the electrolysis process; chlorine and hydrogen are respectively fed into the chlorine treatment process and the hydrogen treatment process to respectively generate finished chlorine and finished hydrogen which reach the standard, so that the purposes of preparing hydrogen for a fuel cell and co-producing a disinfectant by utilizing the landfill leachate membrane concentrated solution are achieved, and the problem of hydrogen waste generated by a traditional brine electrolysis technology is solved.

Description

technical field [0001] The invention belongs to the technical field of hydrogen production, and in particular relates to a method and system for producing hydrogen by utilizing landfill leachate. Background technique [0002] High brine refers to wastewater whose total salt mass fraction calculated based on NaCl content is greater than or equal to 1%. This type of wastewater not only contains certain organic pollutants, but also contains a large number of soluble inorganic salt ions such as calcium, magnesium, sodium, chloride and sulfate. This type of wastewater mainly comes from a wide range of sources, such as: seawater desalination, power plant desulfurization wastewater, chemical production, landfill leachate membrane concentrate, etc. [0003] In existing schemes, high brine refers to a concentrated brine solution that is difficult to biochemically treat with a mass fraction of total dissolved solids (TDS) greater than 8% after the standard discharge water is recovered...

Claims

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Application Information

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IPC IPC(8): C02F9/06C25B1/04C25B1/13C25B1/26C25B1/30C02F101/30C02F103/06
CPCC02F9/00C25B1/26C25B1/13C25B1/30C02F1/725C02F1/78C02F1/469C02F1/461C02F2103/06C02F1/50C02F1/441C02F1/46104C02F2101/30Y02E60/36
Inventor 张搏张定海黄颉
Owner DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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