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沼气净化提纯用什么设备比较好?

时间:2020-12-04
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厌氧池中产生的沼气不能够即时使用,因为其中含有大量的杂质和有害物质,必须经过净化提纯后才能输入管道进行家庭正常使用,那么在沼气净化提纯这个过程中用什么设备比较好呢?
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?
在具体的沼气净化提纯工艺设,首先要考虑工程的初期投资和后期的运行成本,根据沼气的流量范围和工艺要求来确定具体的设备,决定工艺。下面小编为大家先容三种工艺方法以供参考。
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、变压吸附
1. Pressure swing adsorption
用活性炭分子筛,这种办法耗能较低,但是甲烷损失相对较高,这种工艺方法要进行预先脱硫工序。
With activated carbon molecular sieve, the energy consumption is low, but the loss of methane is relatively high. This process requires pre desulfurization.
              生物脱硫
2、化学吸取
2. Chemical absorption
比如胺法,甲烷损失可以非常低,好的可以达到0.1%。但需要大量的热量以及购买化学药剂,同样也需要预先脱硫。
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、高压水洗
3. High pressure washing
高压水洗也有一个甲烷损失的问题,好的厂家能够控制到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.
经常有人会觉得高压水洗的能耗高,其实沼气净化提纯能耗的发生主要在沼气增压阶段,而提纯后沼气本来就需要增压,及时这部分能耗去掉,高压水洗的能耗也不高。水洗用的水可以循环利用,实际消耗水量很低。处理后的尾气可以用于蔬菜大棚,提供植物生长所需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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