Biogas can not be used immediately because it contains a large number of impurities and harmful substances. It must be purified before it can be put into normal use. Is the equipment in the process of better biogas purification and purification?
In the specific process design of biogas purification, the initial investment and later operation cost of the project shall be considered first, and the specific equipment and process shall be determined according to the flow range and process requirements of biogas. Here are three process methods under the environment of Beijing yinherui for your reference.
1. 變壓吸附。
1. PSA.
該方法采用活性炭分子篩，能耗低，但甲烷損失較大。這種工藝方法需要預先脫硫。
This method uses activated carbon molecular sieve, which has low energy consumption but large methane loss. This process requires pre desulfurization.
2. 化學吸收。
2. Chemical absorption.
例如，胺法，甲烷的損失可以很低，高達0.1%。但它需要大量的熱量和購買化學藥品，以及預先脫硫。
For example, in the amine method, the loss of methane can be very low, up to 0.1%. But it requires a lot of heat and buying chemicals, as well as pre desulfurization.
3.高壓清洗。
3. High pressure cleaning.
高壓清洗也有一個甲烷損失的問題，好的制造商可以控制到1%甚至0.5%。
High pressure cleaning also has a problem of methane loss. Good manufacturers can control it to 1% or even 0.5%.
People often think that the energy consumption of high-pressure water cleaning is high. In fact, the energy consumption of biogas purification and purification mainly occurs in the stage of biogas pressurization, and the purification of biogas needs pressurization. If this part of energy consumption is deleted, the energy consumption of high-pressure water cleaning is not high. The water used for washing can be recycled and the actual water consumption is very low. The treated waste gas can be used in vegetable greenhouse to provide CO2 for plant growth.
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2020-03-24
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