傳統(tǒng)意義上甲烷濃度大于20%定義為高濃度瓦斯。這個(gè)濃度的氣體可以直接用來發(fā)電，也可以用于居民用氣。淮南礦業(yè)就有一個(gè)非常大的儲(chǔ)罐，用于周邊居民供氣。因?yàn)榧淄榈谋O限是5%~16%，所以這部分氣體的輸送相對(duì)還是比較安全的。

Traditionally, methane concentration greater than 20% is defined as high concentration gas. This concentration of gas can be directly used for power generation or for residential gas use. Huainan Mining has a very large storage tank for gas supply to surrounding residents. Because the explosive limit of methane is 5% to 16%, the transportation of this gas is relatively safe.

甲烷濃度9%-20%，這一類瓦斯氣體往往處于爆炸極限范圍之內(nèi)，對(duì)輸送有比較高的要求。一般會(huì)在抽排泵站附近安裝瓦斯發(fā)電站。對(duì)氣體的輸送一般會(huì)采用細(xì)水霧輸送或者干粉輸送。

Methane concentration ranges from 9% to 20%, and this type of gas is often within the explosive limit range, requiring high transportation requirements. Gas power stations are usually installed near pumping stations. Gas transportation is generally carried out using fine water mist or dry powder transportation.

甲烷濃度5%-9%，這一類的低濃度瓦斯比較不容易被點(diǎn)燃。所以傳統(tǒng)的瓦斯發(fā)電機(jī)組，在這類氣體上的發(fā)電功率往往都比較低。瓦斯電站在碰到這類濃度的氣體后，往往都選擇停站排空?，F(xiàn)在有些低濃度瓦斯機(jī)組利用微噴引燃技術(shù)可以對(duì)這一類氣體進(jìn)行利用發(fā)電。

Methane concentration is 5% -9%, and this type of low concentration gas is less likely to ignite. So traditional gas generator sets often have relatively low power generation on this type of gas. Gas power stations often choose to shut down and evacuate when encountering gases of this concentration. Some low concentration gas units now use micro spray ignition technology to utilize this type of gas for power generation.

甲烷濃度低于5%，這也是所有瓦斯中排空量最大的一類氣體。目前主流的技術(shù)是進(jìn)行乏風(fēng)氧化，副產(chǎn)品是制熱。現(xiàn)在煤礦不讓燒煤 冬季取暖是比較大的問題 ，乏風(fēng)氧化可能會(huì)迎來一波高潮。

Methane concentration is less than 5%, which is also the type of gas with the largest exhaust volume among all gases. The current mainstream technology is to perform exhaust oxidation, with heating as a byproduct. Nowadays, coal mines do not allow coal burning for winter heating, which is a major problem. The lack of wind and oxidation may lead to a wave of enthusiasm.

發(fā)電機(jī)組會(huì)發(fā)生自動(dòng)解列的情況主要有以下幾種：

There are several situations where the generator set will automatically disconnect, including the following:

①、電網(wǎng)負(fù)荷太少，電站運(yùn)行的功率裕量已超過最大裕量，此時(shí)，按事先設(shè)定輪到進(jìn)入’備用狀態(tài)‘的發(fā)電機(jī)組，允許其進(jìn)入自動(dòng)解列程序，經(jīng)過負(fù)載轉(zhuǎn)移、分閘、停車。進(jìn)入’備用狀態(tài)‘；

① The power grid load is too low, and the power margin of the power station operation has exceeded the maximum margin. At this time, according to the pre-set turn to enter the 'standby state' of the generator set, it is allowed to enter the automatic disconnection program, go through load transfer, disconnection, and shutdown. Enter 'standby state';

②、運(yùn)行機(jī)組出現(xiàn)非立即停車的故障時(shí)，備用機(jī)組已啟動(dòng)并網(wǎng)運(yùn)行后，故障機(jī)組允許進(jìn)入故障解列停車程序；

② When a non immediate shutdown fault occurs in the operating unit, and the standby unit has been started and connected to the grid for operation, the faulty unit is allowed to enter the fault disconnection and shutdown procedure;

③、運(yùn)行機(jī)組出現(xiàn)必須立即停車的故障時(shí)，其主開關(guān)立即跳閘，未經(jīng)許可自動(dòng)進(jìn)入故障解列停車程序。

③ When a fault occurs that requires immediate shutdown of the operating unit, its main switch will trip immediately and automatically enter the fault disconnection and shutdown program without permission.

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