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Method for depriving sulfureted hydrogen in biogas and device

A biogas and hydrogen sulfide technology, applied in chemical instruments and methods, separation methods, and dispersed particle separation, etc., can solve the problems of low desulfurization efficiency and high operating costs of biogas, and achieve simple methods, good desulfurization efficiency, and high efficiency Effect

Inactive Publication Date: 2010-05-12
NANJING UNIV
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems that the existing dry and wet desulfurization technologies cannot be directly applied to biogas desulfurization with low pressure, resulting in low biogas desulfurization efficiency and high operating costs, and to invent a method for removing hydrogen sulfide from biogas method and device

Method used

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  • Method for depriving sulfureted hydrogen in biogas and device
  • Method for depriving sulfureted hydrogen in biogas and device
  • Method for depriving sulfureted hydrogen in biogas and device

Examples

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Embodiment 1

[0026] Such as figure 1 shown.

[0027] A method for removing hydrogen sulfide in biogas, it comprises the following steps:

[0028] First, the biogas enters the bubble tray absorption and oxidation device, and the hydrogen sulfide in the biogas is absorbed by the sprayed absorption liquid containing oxidant, and the absorption liquid is Na 2 CO 3 / NaHCO 3 or Na 2 CO 3 / NaHCO 3 The compound solution with high-valent iron salt complexes, the compound ratio is 1:0.5-5% by mass, where Na 2 CO 3 / NaHCO 3 or Na 2 CO 3 / NaHCO 3 The mass ratio of the high-valent iron salt complex is 1, and the mass ratio of the high-valent iron salt complex is 0.5 to 5. The high-valent iron (ferric iron) salt complex can be EDTA complex iron, sulfosalicylic acid complex iron, triethanolamine Complexed iron, etc.: the oxidizing agent is one or a combination of ozone, hydrogen peroxide or potassium permanganate, wherein the concentration range of ozone is: 0.2 ~ 10g / m 3 , the concentration...

Embodiment 2

[0033] Such as figure 2 shown.

[0034] A device for removing hydrogen sulfide in biogas, which is mainly composed of a bubbling tray absorption and oxidation device 7 and a dry desulfurization tower 8, and the dry desulfurization tower 8 is located on the upper part of the bubbling tray absorption and oxidation device 7, two The upper grid plate 9 is used as the air inlet of the dry desulfurization tower 8, and the upper part of the dry desulfurization tower 8 is provided with an air outlet 10, and the lower part of the air outlet 10 is provided with a feeding port 16 , the lower part of the feeding port 16 is the desulfurizing agent layer 18 of the main desulfurization unit of the dry-type desulfurization tower. The bottom of the grid plate 9 is installed with the absorption liquid spray pipe 5 in the bubble tray absorption and oxidation device 7; Gas inlet 2, the upper part of the housing 1 is provided with a biogas outlet, in the housing 1, above the inlet 2, a grid pla...

Embodiment 3

[0036] Such as image 3 shown.

[0037] A device for removing hydrogen sulfide in biogas, which is mainly composed of a bubbling tray absorption and oxidation device 7 and a wet desulfurization tower 11, and the wet desulfurization tower 11 is located at the upper part of the bubbling tray absorption and oxidation device 7, between the two The space is separated by a partition 12, and the partition 12 is equipped with a gas lift tube 13 and a downcomer 14, and the lower end of the downcomer 14 extends from the lower part of the bubble tray absorption oxidation device 7 and the absorption liquid regeneration circulation device 15 The gas outlet 10 and the absorption liquid spray pipe 19 are arranged on the upper part of the wet desulfurization tower 11. The middle of the wet desulfurization tower 11 is a packing layer 21, and the packing layer 21 is supported on the upper grid plate 23. The upper part of the packing layer 21 is provided with There is a feed port 20, the bottom...

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Abstract

The invention provides a method for depriving sulfureted hydrogen in biogas, which is characterized by comprising the following steps: firstly, introducing the biogas into a bubble column plate absorption oxidation device, and absorbing sulfureted hydrogen in the biogas by utilizing sprayed absorption solution containing an oxidant; secondly, controlling the air velocity in a hollow tower of the bubble column plate absorption oxidation device to be 0.2-1.5m / s, wherein the height of the liquid on a plate grid is 0.2-0.8m; and finally sending the biogas absorbed by absorption solution to a subsequent dry-type desulfurizing tower, a wet-type desulfurizing tower or a biological desulfurizing tower for depriving sulfureted hydrogen further. The invention also discloses three devices for depriving sulfureted hydrogen in the biogas by utilizing the combination of the bubble column plate absorption oxidation devices, a desulfuration device using the common dry method and wet method. The invention has simple method, and can effectively and quickly carry out desulfuration at constant pressure.

Description

technical field [0001] The invention relates to an environmental protection technology, in particular to a desulfurization technology and device necessary for the regeneration and utilization of biogas, in particular to a method and a device for removing hydrogen sulfide in biogas. Background technique [0002] Biogas such as biogas, digestion gas, and landfill gas all contain hydrogen sulfide gas, and its concentration ranges from hundreds to tens of thousands of ppm. In the process of industrial utilization of the above-mentioned biogas, the hydrogen sulfide in it needs to be removed. [0003] At present, the commonly used desulfurization technologies include dry method, wet method and biological desulfurization. Dry desulfurization mainly uses iron oxide or activated carbon as the main adsorbent, wet desulfurization mainly uses wet oxidation catalytic method, and biological desulfurization uses thiophilic bacteria to desulfurize through trickling filter bed reactors. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/79B01D53/78B01D53/52
Inventor 龚惠娟陈泽智吴未立蒋琴
Owner NANJING UNIV
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