Biomass biogas purification method

A purification method and biomass technology, applied in the field of resources and environment, can solve the problems of high cost, complex process, few uses, etc., and achieve the effects of low cost, simple operation and high purification rate

Inactive Publication Date: 2014-10-08
JILIN HUIZE GAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, domestic biogas projects are slow to carry out biogas purification work. Most of the biogas is only used as fuel for rural stoves. Important, especially some impurities in the biogas have not been completely removed, which limits the application of biogas; and due to cost and environmental reasons, the cost is too high, the process is complicated, and the recyclability is poor, so the application of biogas cannot be well developed

Method used

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  • Biomass biogas purification method

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Experimental program
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Effect test

Embodiment 1

[0028] like figure 1 As shown, the untreated biogas 1 is passed through the particle filter 2 to decompose the particles and condensate in the gas flow, and then enters the drying tower 3, and the water is removed by drying, and then passes through the desulfurization tower 4, and is heated at normal temperature. The sulfide is removed under pressure, and the desulfurization process adopts the dry desulfurization continuous regeneration process, in which the desulfurizer uses iron oxide as the main active catalytic component, and adds various co-catalysts and carriers, and the desulfurization rate can reach more than 90%. The biogas passes through the compressor 5 and is compressed to 22MPa; then passes through the recooler 6 to reduce its temperature and then flows into the low-temperature purification tower 7, and controls the temperature in the low-temperature purification tower to -56°C so that the CO in the biogas 2 The liquefaction is precipitated from the lower part of ...

Embodiment 2

[0030] A method for purifying biomass methane, comprising the steps of:

[0031] The first step: the biogas 1 is passed through the particulate filter 2, and after the particles and condensate are separated, they are dried in the drying tower 3;

[0032] The second step: pass the dried biogas into the desulfurization tower 4 for desulfurization, then compress it to 21MPa through the compressor 5, and then cool down through the first recooler 6; the desulfurization is carried out continuously under normal temperature and pressure The regeneration process removes sulfide; the desulfurizer uses iron oxide as the main active catalytic component, and also includes a variety of co-catalysts and carriers. The desulfurization rate is above 90%.

[0033] Step 3: Pass the cooled biogas into the low-temperature purification tower 7, and the liquefied CO in the biogas 2 It is precipitated from the lower part of the low-temperature purification tower 7, and the pure methane gas flows int...

Embodiment 3

[0035] A method for purifying biomass methane, comprising the steps of:

[0036] The first step: the biogas 1 is passed through the particulate filter 2, and after the particles and condensate are separated, they are dried in the drying tower 3;

[0037] The second step: pass the dried biogas into the desulfurization tower 4 for desulfurization, then compress it to 24.5MPa through the compressor 5, and then cool down through the first recooler 6; the desulfurization is carried out under normal temperature and pressure by dry desulfurization The continuous regeneration process removes sulfide; the desulfurizer uses iron oxide as the main active catalytic component, and also includes a variety of co-catalysts and carriers. The desulfurization rate is above 90%.

[0038] The third step: the cooled biogas flows into the low-temperature purification tower 7, and the liquefied CO in the biogas 2 It is precipitated from the lower part of the low-temperature purification tower 7, an...

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Abstract

A disclosed biomass biogas purification method comprises: introducing unprocessed biogas into a particle filter to separate particles and condensate in the gas flow, then drying to remove water by passing through a drying tower, then removing sulfides at normal temperature under normal pressure by passing through a desulfurization tower, and compressing desulfurized biogas to 21-24.5 MPa by passing through a compressor, then processing in a recooler to reduce the temperature of the biogas, then enabling the biogas to flow into a low-temperature purification tower, controlling the temperature in the low-temperature purification tower to be -56 DEG C, so as to liquidize CO2 in the biogas and separate out from the bottom of the low-temperature purification tower, and further to obtain purified methane gas; enabling purified methane gas to flow into the recooler through the upward side of the low-temperature purification tower, performing heat exchange in the recooler and controlling the temperature to be 11-14 DEG C, discharging through a control valve, and collecting by a CNG (compressed natural gas) storage tank, so as to obtain purified methane. The method is high in purification rate, is capable of effectively removing H2S, H2O, CO2, halogenated mixed gas and the like, and enables the concentration of methane to be 99% or more.

Description

technical field [0001] The invention relates to the technical field of resources and environment. More specifically, it relates to a method for purifying biomass biogas. Background technique [0002] The direct product of biogas engineering construction is biogas, which is a combustible mixed gas produced by microorganisms. Its main component is methane, with a content of about 50-75%, followed by 25-45% carbon dioxide, and other gases. Such as hydrogen sulfide, carbon monoxide, nitrogen, water vapor, oxygen, etc. The composition of biogas and natural gas is very different, the methane content of natural gas is as high as 96%, and the calorific value is 33500KJ / m 3 , and the calorific value of biogas is only about half of that of natural gas, which limits the use of biogas. It is mainly used for lighting, civil and commercial stoves, industrial heat sources, biogas power generation, etc., and can replace straw, firewood, coal and other fuels. [0003] The purification of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/10
Inventor 李安泰
Owner JILIN HUIZE GAS
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