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. 变压吸附。
1. PSA.
该方法采用活性炭分子筛，能耗低，但甲烷损失较大。这种工艺方法需要预先脱硫。
This method uses activated carbon molecular sieve, which has low energy consumption but large methane loss. This process requires pre desulfurization.
2. 化学吸收。
2. Chemical absorption.
例如，胺法，甲烷的损失可以很低，高达0.1%。但它需要大量的热量和购买化学药品，以及预先脱硫。
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.高压清洗。
3. High pressure cleaning.
高压清洗也有一个甲烷损失的问题，好的制造商可以控制到1%甚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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