天然氣分子篩脫水裝置

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天然氣分子篩脫水裝置

Browse volume：159 | Reply：0 | Release time：2024-12-30 13:14:02

油田氣伴生氣脫水裝備頁巖氣脫水裝置

天然氣分子篩脫水裝置介紹

【1】天然氣脫水是很有必要的，它可以除去天然氣中的水分，使天然氣輸送管道免受水分腐蝕，也能避免產生水化合物堵塞管道，同時也減少了天然氣輸送過程

天然氣分子篩脫水裝置有何特點。

天然氣分子篩脫水裝置的原理，它是利用多孔性的分子篩固體吸附劑（也可選用硅膠和活性氧化鋁吸附劑）脫除天然氣中的水分，達到凈化氣體、降低水露點的目的。適用于天然氣凝液（NGL）回收、天然氣液化（LNG）、壓縮天然氣（CNG）等裝置水露點降要求大，需要深度脫水的場合。

天然氣分子篩脫水裝置組件包括分子篩吸收塔、前置聚結過濾分離器、后置除塵過濾器、再生氣加熱爐或換熱器、再生氣空冷器、再生氣液分離器和自動切換閥組等，天然氣從脫水塔頂部進入，自上而下在分子篩脫水塔內完成吸附脫水過程。一定時間之后，使用加熱到300℃的干氣自下而上吹掃分子篩床層，分子篩吸附的水分被高溫加熱脫附，分子篩獲得再生。

天然氣分子篩脫水裝置采用撬裝設計，可以配置一塔吸附一塔再生的雙塔流程，也可選擇一塔吸附一塔再生一塔冷卻的三塔流程。

天然氣輕烴回收裝置的簡單介紹

油田氣是一種混合氣體，其主要成分為甲烷，另外還含有乙烷、丙烷、丁烷等，低分子量烷烴和少量的氮氣、二氧化碳、硫化氫及其它微量非烴類氣體。常規(guī)油田氣根據礦藏特點可分為氣田氣、凝析氣田氣和伴生氣等。

天然氣分子篩脫水裝置油田氣伴生氣脫水裝備頁巖氣脫水裝置

一、 油田天然氣概述和分類

油田氣是一種混合氣體，其主要成分為甲烷，另外還含有乙烷、丙烷、丁烷等，低分子量烷烴和少量的氮氣、二氧化碳、硫化氫及其它微量非烴類氣體。

常規(guī)油田氣根據礦藏特點可分為氣田氣、凝析氣田氣和伴生氣等。

l 石油伴生氣

l 氣井氣

l 干氣

l 濕氣、貧氣和富氣

二、油田天然氣燃燒排放有害物的影響

油田氣里主要成分是甲乙烷、還含大量的液化石油氣和輕烴油，直接燃燒排放不但造成資源浪費，還造成大氣的嚴重污染，對大氣質量產生影響。

三、油田天然氣冷凝回收輕烴工藝方案介紹

根據業(yè)主提供的伴生氣數據，制定如下方案：

來自油田氣管道的氣體，首先通過氣水分離系統(tǒng)，進行凈化分離，使大量的水油污分離.

然后經天然氣壓縮機壓縮后進一步冷凝凈化，凈化后的高壓氣體經干燥系統(tǒng)后進入制冷系統(tǒng)，其裝置設四級冷凝。

預冷裝置分為二個一級預冷脫油器溫度＋3℃，二級冷卻器冷凝溫度為-18℃，可回收天然氣中的C6部分，三級冷卻器冷凝溫度為-25℃，可回收天然氣中的C5部分，四級冷卻器冷凝溫度為-45℃，可回收天然氣中的C4、C3部分。通過四級冷凝后的天然氣均為干氣（甲烷成分）、C1、C2無雜質的潔氣，使之再燃燒發(fā)電或用于其它。C3以上輕烴經回流罐進入儲存區(qū)。