1. Gas concentration. The concentration limit of gas explosion refers to the volume concentration of gas in the mixture of gas and air. When the gas concentration reaches 9.5%, theoretically, the gas can react safely with the oxygen in the air, thus releasing the most heat, so the explosion intensity is the largest; when the gas concentration is lower than 5%, due to the less gas participating in the chemical reaction, it can not form heat accumulation, so it can not explode and can only burn; When the gas concentration is higher than 16%, due to the lack of oxygen in the air, it can not meet all the needs of oxygen reaction. Only part of the gas reacts with oxygen, and the heat generated is absorbed and cooled by the excess gas and surrounding media, so the explosion can not occur.

2、充足的氧气含量。瓦斯与空气混合气体中氧气的浓度必须大于12%，否则爆炸反应不能持续。煤矿井下的封闭区域、 采空区内及其他裂隙等处，由于氧气消耗或没有供氧条件，可能出氧气浓度低于12%的情况;其他巷道、工作场所等按规定氧气含量不得低于20%，一般不存在 氧气浓度低于12%的情况 ，因为在些情况下，人员在短时间内就会窒息而死亡。

2. Adequate oxygen content. The concentration of oxygen in the mixture of gas and air must be more than 12%, otherwise the explosion reaction cannot be sustained. Due to oxygen consumption or lack of oxygen supply conditions, the oxygen concentration may be lower than 12% in the closed area, goaf and other fissures under the coal mine; the oxygen content in other roadways and workplaces shall not be less than 20% according to the regulations, and generally there is no case of oxygen concentration lower than 12%, because in some cases, personnel will suffocate and die in a short time.

3、足够能量的点火源。点火源能够引起瓦斯爆炸的三个条件是：(1)温度不低于650度。(2)能量大于 0.28mJ.(3)持续时间大于爆炸感应期。这三个条件通常很容易满足，如明火、煤炭自燃、撞击火花、电火花等。在煤矿开采过程中，对一些不可避免的火源有时需要采取特殊的技术，使其不能满足瓦斯的点火条件 。例如：井下爆破时所用的毫秒雷管产生的火焰，其他温度主达2000度，但持续的时间很短，小于爆炸感应期，因此不会引起瓦斯爆炸。

3. Ignition source with enough energy. The three conditions for ignition source to cause gas explosion are: (1) the temperature is not lower than 650 ℃. (2) (3) the duration is longer than the induction period. These three conditions are usually easy to meet, such as open fire, coal spontaneous combustion, impact spark, electric spark, etc. In the process of coal mining, some inevitable fire sources sometimes need to adopt special technology, which can not meet the ignition conditions of gas. For example: the flame produced by millisecond detonator used in underground blasting, other temperatures are mainly up to 2000 degrees, but the duration is very short, which is less than the induction period of explosion, so it will not cause gas explosion.

利用瓦斯发电需要满足一定的条件，我们知道瓦斯的主要成份是甲烷(CH4),它是一种无色无味的可燃性气体，当瓦斯浓度在5%-16%时，遇明火会发生爆炸，当浓度在9.5%时爆炸的威力，当瓦斯浓度大于16%，遇明火，瓦斯会只燃烧不爆炸，我们利用瓦斯发电机组进行发电，要使瓦斯气源的浓度达到爆炸范围(更好是9.5%),此时爆炸产生的化学能，发电效率也就。除了瓦斯浓度外，发电对瓦斯的温度、压力、水分含量与杂质粒度等也有一定的要求：

We know that the main component of gas is methane (CH4), It is a kind of colorless and tasteless combustible gas. When the gas concentration is 5% - 16%, it will explode in case of open fire. When the concentration is 9.5%, the explosion is the most powerful. When the gas concentration is greater than 16%, the gas will only burn but not explode in case of open fire. We use the gas generator set to generate electricity, so as to make the concentration of gas source reach the explosion range (preferably 9.5%), At this time, the chemical energy generated by the explosion is the largest, and the power generation efficiency is the highest. In addition to gas concentration, power generation also has certain requirements for gas temperature, pressure, moisture content and impurity particle size

◎瓦斯温度≤ 40℃;

Gas temperature ≤ 40 ℃;

◎瓦斯压力 3 ～ 20kpa，压力变化率≤ 1kpa/m

The gas pressure is 3 ~ 20KPa, and the pressure change rate is ≤ 1kPa / m

◎ H2S ≤ 200mg/Nm3 ;

◎ H2S ≤ 200mg/Nm3 ;

◎瓦斯中水分含量≤ 40g/Nm3;

Moisture content in gas ≤ 40g / Nm3;

◎杂质粒度≤ 5μm, 杂质含量≤ 30mg/Nm3

The particle size of impurities is less than 5 μ m, and the impurity content is less than 30 mg / Nm3

更多的关于瓦斯发电机组的问题或者详细的内容，请进入我们公司的网站：http://www.huannengpower.com网站中会有很多的内容仅供参考。

For more questions or details about gas generator set, please visit our website: http://www.huannengpower.com There will be a lot of content in the website for reference only.