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Method for producing hydrogen from biogas biomass

A biomass and biogas technology, applied in the field of hydrogen production, can solve environmental pollution and other problems, achieve the effect of solving environmental pollution and energy problems, promoting national economic development and protecting the ecological environment, and solving energy crisis and environmental crisis

Active Publication Date: 2018-03-06
SICHUAN TECHAIRS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention adopts a method for producing hydrogen from biogas-like biomass. While the biogas is utilized at a high value, it also solves the problems of environmental pollution and energy. The hydrogen produced is also an ideal pollution

Method used

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  • Method for producing hydrogen from biogas biomass
  • Method for producing hydrogen from biogas biomass
  • Method for producing hydrogen from biogas biomass

Examples

Experimental program
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Effect test

Embodiment 1

[0057] Such as Figure 5 As shown, a method for producing hydrogen from biogas-like biomass, the following operations are performed in sequence:

[0058] 1) Pre-purification

[0059] The biogas from the gas tank, with a sulfur content of about 800ppm, is pressurized by a Roots blower to 30kpag and then enters the lower part of the wet desulfurization tower, where it contacts the top-down desulfurization lean liquid on the packing surface from bottom to top. The desulfurization solution that has absorbed various reducing gases is sucked into the air by jetting, the solution is oxidized and regenerated, and sulfur foam is precipitated, and the clear desulfurization solution after the foam separation can be recycled. The sulfur foam is further passed through the sulfur melting kettle to produce sulfur. Biogas H2S after crude desulfurization: ≤300ppm. In order to ensure the desulfurization effect and protect the subsequent adsorbent, the biogas after rough desulfurization is fu...

Embodiment 2

[0068] Such as Image 6As shown, a method for producing hydrogen from biogas-like biomass, the following operations are performed in sequence:

[0069] 1) Pre-purification

[0070] The biogas from the air bag, with a sulfur content of about 200ppm, is pressurized to 50kpag by the Roots blower and then enters the dry desulfurization unit with iron oxide dry desulfurization; it consists of 3 dry desulfurization towers, 2 of which are in the state of adsorption, and the other 1 tower is on standby. The gas enters the desulfurization tower from the lower part, passes through the packing layer in the desulfurization tower, absorbs or reacts H2S into sulfide or polysulfide, and remains in the packing layer, and the purified gas is discharged from the top of the desulfurization tower. Gas H2S after desulfurization and purification: ≤25ppm.

[0071] 2) concentrated

[0072] The pre-purified biogas is pressurized to 0.4Mpag by the compressor and then enters the pressure swing adsor...

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Abstract

The invention discloses a method for producing hydrogen from biogas biomass. The method comprises the following four major procedures: pre-purification, concentration, hydrogen production and hydrogenextraction. After biogas has undergone pre-purification and desulfurization, the biogas is pressurized and enters the pressure-swing adsorption and concentration unit, and methane is concentrated; after pressurization and preheating, further desulfurization is performed in virtue of a fine desulfurization tower; intermediate gas obtained after fine desulfurization and process steam are further preheated and then enter a reformer, and methane reacts with water vapor to produce CO, CO2, and H2; waste heat produced by reforming can by-produce steam which is output; CO is converted into CO2 through multiple-stage heat recovery and medium-temperature conversion so as to obtain more hydrogen and increase hydrogen yield; converted gas enters the pressure-swing adsorption hydrogen extraction procedure after multiple-stage heat recovery and cooling so as to obtain pure hydrogen and produce by-products such as steam and sulfur. In concentration of methane in the concentration procedure, the once-through yield of methane can reach 95% or more; remaining effective components provide equipment with heat energy through the recycling of tail gas; so the total utilization rate of methane is almost 100%, and full recovery of methane is realized.

Description

technical field [0001] The invention belongs to the field of hydrogen production, and more specifically relates to a method for producing hydrogen from biogas-like biomass. Background technique [0002] Hydrogen is the main industrial raw material, and also the most important industrial gas and special gas. It has been widely used in petrochemical industry, electronics industry, metallurgical industry, food processing, float glass, fine organic synthesis, aerospace and other fields. At the same time, hydrogen is also an ideal secondary energy source (secondary energy refers to energy that must be produced from a primary energy source such as solar energy, coal, etc.). Under normal circumstances, hydrogen easily combines with oxygen. This property makes it a natural reducing agent for use in production to prevent oxidation. During high temperature processing in glassmaking and in the fabrication of electronic microchips, hydrogen is added to the nitrogen shielding gas to re...

Claims

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Application Information

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IPC IPC(8): C01B3/48C01B3/38C01B17/05
CPCC01B3/382C01B3/48C01B17/05C01B2203/0283C01B2203/043C01B2203/0475C01B2203/1241C01B2203/1258Y02P20/129
Inventor 钟雨明刘开莉钟娅玲蔡跃明陈运牟树荣
Owner SICHUAN TECHAIRS
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