山东化工
山東化工
산동화공
SHANDONG CHEMICAL INDUSTRY
2012年
5期
8-11
,共4页
深冷脱氮%天然气%液化%优化
深冷脫氮%天然氣%液化%優化
심랭탈담%천연기%액화%우화
cryo - denitrification%natural gas%liquefaction%optimization
在不同气源中，含氮量较高的天然气热值低、集输过程中能耗大，为脱除天然气中过高含量的氮气，设计了深冷脱氮的天然气液化工艺。利用过程系统软件HYSYS模拟了深冷脱氮及液化天然气的过程，并分析了原料天然气特性、制冷剂特性及精馏塔操作条件对液化单元能耗的影响，对工艺条件进行了优化。结果表明，在制冷剂循环压力和温度为0．4MPaG和35℃，原料天然气压力和温度分别为2．6MPaG和20℃．精馏塔压力为0．6MPaG，氮气所占比例为0．5时，该液化单元的功耗最小，为0．527kW／Nm2，该工艺模拟和优化为高含氮气源进行液化利用提供了重要的参考。
在不同氣源中，含氮量較高的天然氣熱值低、集輸過程中能耗大，為脫除天然氣中過高含量的氮氣，設計瞭深冷脫氮的天然氣液化工藝。利用過程繫統軟件HYSYS模擬瞭深冷脫氮及液化天然氣的過程，併分析瞭原料天然氣特性、製冷劑特性及精餾塔操作條件對液化單元能耗的影響，對工藝條件進行瞭優化。結果錶明，在製冷劑循環壓力和溫度為0．4MPaG和35℃，原料天然氣壓力和溫度分彆為2．6MPaG和20℃．精餾塔壓力為0．6MPaG，氮氣所佔比例為0．5時，該液化單元的功耗最小，為0．527kW／Nm2，該工藝模擬和優化為高含氮氣源進行液化利用提供瞭重要的參攷。
재불동기원중，함담량교고적천연기열치저、집수과정중능모대，위탈제천연기중과고함량적담기，설계료심랭탈담적천연기액화공예。이용과정계통연건HYSYS모의료심랭탈담급액화천연기적과정，병분석료원료천연기특성、제랭제특성급정류탑조작조건대액화단원능모적영향，대공예조건진행료우화。결과표명，재제랭제순배압력화온도위0．4MPaG화35℃，원료천연기압력화온도분별위2．6MPaG화20℃．정류탑압력위0．6MPaG，담기소점비례위0．5시，해액화단원적공모최소，위0．527kW／Nm2，해공예모의화우화위고함담기원진행액화이용제공료중요적삼고。
The natural gas with high content of nitrogen has the low combustion heat and large energy consumption in the oil - gas gathering and transportation. In order to remove the redundant nitrogen gas, a natural gas liquefaction process with cryo - denitrification was brought forward. The effects of raw natural gas＇properties, refrigerants＇properties, denitrification degree and the rectification pressure on the energy consumption were simulated and analyzed using the software of HYSYS. The optimization of operating conditions showed that when the pressure and temperature of refrigerants and natural gas were 0.4MPaG and 35℃, 2.6 MPaG and 20℃ respectively and the column pressure was 0.6MPaG, the energy consumption of the liquefied unit was least （ 0. 527 kW/Nm3 ）. The designed process provided important reference for the natural gas liquefaction with high -content nitrogen.
