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沼气预处理对沼气发电机组影响及相关特点

来源:http://www.huannengpower.com   发布于:2019-04-17

针对发起机对沼气的请求,在沼气发起机前装置处置系统以处理了气源侧与用气侧的矛盾是目前处理沼气发电机组应用问题的有效办法,主要表如今以下两个方面:

In response to the request of biogas generator for biogas, the disposal system in front of the biogas generator to deal with the contradiction between the gas source side and the gas side is an effective way to deal with the application of biogas generating units. The following two aspects are mainly manifested today:

1 降低气体的相对湿度

1. Reducing the relative humidity of gases

水分的脱除,思索到详细的状况,简单分为凝结水的脱除以及未凝结水脱除两大局部,前者能够采用汽水别离器来完成,后者的完成较为复杂,目前主要有下面几种方式:

The removal of water can be divided into two parts: the removal of condensate water and the removal of non-condensate water. The former can be accomplished by steam-water separator, while the latter is more complex. At present, there are mainly the following ways:

(a)低温除湿:经过制冷设备降低气体的温度,使得其中的水蒸气凝结,然后扫除系统;

(a) Low temperature dehumidification: the refrigeration equipment reduces the temperature of the gas, condensates the water vapor in it, and then sweeps the system;

(b)吸附:采用对水有较强吸附作用的吸附剂,将气体中的水剖析出;

(b) Adsorption: Water in the gas is separated by adsorbent with strong adsorbing effect on water.

QQ截图20171025151837.jpg

(c)膜过滤:采用特殊构造的膜资料,在特定的条件下将水从气体中分出。

(c) Membrane filtration: Water is separated from gases under specific conditions using specially constructed membrane data.

2 降低气体杂质成分含量

2. Reducing the content of impurities in gases

气体中的杂质是比拟复杂的成分,由于是针对发起机的应用,所以对杂质的判别主要以发起机的请求为准,主要有下面几种:

Impurities in gases are comparatively complex components. Because they are for the application of the initiator, the identification of impurities is mainly based on the request of the initiator. There are the following main types:

(a)硫的去除:

(a) Removal of sulphur:

以硫化氢为主的硫化物的去除主要有物理、化学以及生物三种方式。其中物理办法主要指物理吸附方式脱硫,这种方式操作烦琐,但常常需求占地较大的设备,而且吸附剂需求再生。化学方式指以化学反响的方式将硫固化下来,目前有干法及湿法,其差异主要是反响物的物理形态是固体还是液体的差异。生物法脱硫是目前比拟新兴的一种方式,其主要原理是在反响罐中培育出适宜的菌种,这些菌种以硫化物为养料,将其中的硫固定下来。 关于硫含量不高的气体,采用物理吸附或者干法脱硫普通比拟经济适用,而且操作烦琐。

The removal of hydrogen sulfide mainly includes physical, chemical and biological methods. Physical method mainly refers to physical adsorption desulfurization, which is cumbersome to operate, but often requires larger equipment, and adsorbent needs regeneration. Chemical means that sulfur is solidified by chemical reaction. At present, there are dry and wet methods. The main difference is whether the physical form of the reactant is solid or liquid. Biological desulfurization is a newly developed method. Its main principle is to cultivate suitable strains in the reactor tank. These strains are fed with sulfide and fix sulfur in them. For gases with low sulfur content, physical adsorption or dry desulfurization is generally economical and applicable, and the operation is cumbersome.

此外,依据我国的环保规范规则:沼气作为能源应用时,沼气中的H2S含量不得超越200mg/Nm3。因而沼气经过脱硫处置后需求采用沼气剖析仪对沼气中H2S含量停止实时在线监测,为业主提供实时精确的数据参考,协助其对沼气预处置工艺停止优化调整,进步沼气发电机组进气质量,以保证H2S含量到达沼气发电的请求。

In addition, according to China's environmental protection regulations, when biogas is used as energy, the H2S content in biogas should not exceed 200 mg/Nm3. Therefore, it is necessary to use biogas analyzer to stop real-time on-line monitoring of H2S content in biogas after desulfurization treatment, to provide real-time and accurate data reference for owners, to help them stop optimizing and adjusting the pretreatment process of biogas, and to improve the intake quality of biogas generating units, so as to ensure that H2S content reaches the requirement of Biogas power generation.

由于沼气成分复杂,除H2S外还含有CH4、CO2、O2等气体成分,假如要保证沼气发电机组的沼气质量,进步沼气热值,保证沼气熄灭发电效率,除了要降低H2S含量,经过监测沼气中CH4、CO2的浓度,为优化厌氧发酵工艺,进步CH4含量,降低CO2含量提供参考根据,也是非常必要的。

Because the composition of biogas is complex, besides H2S, it also contains CH4, CO2 and O2. If we want to ensure the biogas quality of biogas generating units, improve the calorific value of biogas, and ensure the efficiency of biogas extinguishing and generating electricity, besides reducing the content of H2S, the concentration of CH4 and CO2 in biogas should be monitored to provide reference basis for optimizing anaerobic fermentation process, improving the content of CH4 and reducing the content of CO2. Necessary.


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