厭氧池中產(chǎn)生的沼氣不能夠即時使用，因為其中含有大量的雜質(zhì)和有害物質(zhì)，必須經(jīng)過凈化提純后才能輸入管道進(jìn)行家庭正常使用，那么在沼氣凈化提純這個過程中用什么設(shè)備比較好呢？
Biogas produced in anaerobic digester can not be used immediately because it contains a large number of impurities and harmful substances, which must be purified before it can be put into the pipeline for normal use at home. What equipment is better for biogas purification and purification?
在具體的沼氣凈化提純工藝設(shè)，首先要考慮工程的初期投資和后期的運(yùn)行成本，根據(jù)沼氣的流量范圍和工藝要求來確定具體的設(shè)備，決定工藝。下面小編為大家介紹三種工藝方法以供參考。
In the specific design of biogas purification process, the initial investment and later operation cost of the project should be considered first, and the specific equipment should be determined according to the flow range and process requirements of biogas. The following small series for you to introduce three kinds of process methods for reference.
1、變壓吸附
1. Pressure swing adsorption
用活性炭分子篩，這種辦法耗能較低，但是甲烷損失相對較高，這種工藝方法要進(jìn)行預(yù)先脫硫工序。
With activated carbon molecular sieve, the energy consumption is low, but the loss of methane is relatively high. This process requires pre desulfurization.
2、化學(xué)吸收
2. Chemical absorption
比如胺法，甲烷損失可以非常低，好的可以達(dá)到0.1%。但需要大量的熱量以及購買化學(xué)藥劑，同樣也需要預(yù)先脫硫。
For example, for amine method, the methane loss can be very low, good can reach 0.1%. But it requires a lot of heat and chemicals, and it also requires pre desulfurization.
3、高壓水洗
3. High pressure washing
高壓水洗也有一個甲烷損失的問題，好的廠家能夠控制到1%，甚至0.5%。
High pressure water washing also has a problem of methane loss, which can be controlled to 1% or even 0.5% by good manufacturers.
經(jīng)常有人會覺得高壓水洗的能耗高，其實(shí)沼氣凈化提純能耗的發(fā)生主要在沼氣增壓階段，而提純后沼氣本來就需要增壓，及時這部分能耗去掉，高壓水洗的能耗也不高。水洗用的水可以循環(huán)利用，實(shí)際消耗水量很低。處理后的尾氣可以用于蔬菜大棚，提供植物生長所需CO2。
Some people often think that the energy consumption of high-pressure water washing is high. In fact, the energy consumption of biogas purification and purification mainly occurs in the stage of biogas pressurization. After purification, biogas needs to be pressurized. If this part of energy consumption is removed in time, the energy consumption of high-pressure water washing is not high. The water for washing can be recycled and the actual consumption of water is very low. The treated tail gas can be used in vegetable greenhouse to provide CO2 for plant growth.
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2020-12-04
