【正文】 ................................... 3 工藝流程設(shè)計(jì)原則 ............................................................................................. 5 主要工藝設(shè)備選型 ...................................................................................................... 5 管道內(nèi)徑計(jì)算 .................................................................................................... 5 管道壁厚計(jì)算 .................................................................................................... 6 閥門選型 ........................................................................................................... 7 原 動(dòng)機(jī)選型 ......................................................................................................10 機(jī)組備用方式 ...................................................................................................10 匯管選型 ..........................................................................................................10 流量計(jì)選型 ...................................................................................................... 11 分離器選型 ......................................................................................................13 站場(chǎng)控制保障系統(tǒng) .....................................................................................................14 概述 .................................................................................................................14 主要功能 ..........................................................................................................14 壓氣站自動(dòng)化控制 .....................................................................................................14 站控天然氣計(jì)量 .........................................................................................................15 站控儀表 ...................................................................................................................15 通信控制 ...................................................................................................................16 站場(chǎng)防腐 ...................................................................................................................16 水電供應(yīng) .................................................................................................................17 供電 ...............................................................................................................17 供水 ...............................................................................................................17 電防護(hù)與消防 ...........................................................................................................17 3 計(jì)算書 ................................................................................................................................19 天然氣基本參數(shù)確定 ..................................................................................................19 天然氣的分子量 ...............................................................................................19 天然氣相的對(duì)密度 ............................................................................................20 天然氣的壓縮系數(shù) Z.........................................................................................20 天然氣在操作條件下的密度 ..............................................................................20 天然氣在操作條件下的粘度 ..............................................................................21 分離器的尺寸設(shè)計(jì) ......................................................................................................22 濾芯個(gè)數(shù)和分離器臺(tái)數(shù) .....................................................................................22 分離器進(jìn)出口直徑及壁厚計(jì)算公式 ...................................................................23 氣體通過絲網(wǎng)最大允許速度 ..............................................................................24 通過絲網(wǎng)除霧器的面積計(jì)算其直徑 ...................................................................25 計(jì)算結(jié)果 ..........................................................................................................25 調(diào)節(jié)閥 .......................................................................................................................25 調(diào)節(jié)閥實(shí)測(cè)流通能力計(jì)算 .................................................................................25 計(jì)算結(jié)果及選型 ...............................................................................................26 站內(nèi)管線計(jì)算 ............................................................................................................26 管徑和管道壁厚計(jì)算公式 .................................................................................26 速度校核公式 ...................................................................................................27 計(jì)算過程、校核及結(jié)果 .....................................................................................27 流量計(jì)的計(jì)算 ............................................................................................................28 已知參數(shù) ..........................................................................................................28 標(biāo)準(zhǔn)參比的體積流量公式 .................................................................................29 流量計(jì)算中主要參數(shù)的確定 ..............................................................................29 輔助計(jì)算 ..........................................................................................................31 孔板開孔直徑計(jì)算 ............................................................................................32 流量計(jì)選型 ......................................................................................................33 安全閥的計(jì)算 ............................................................................................................33 安全泄放量 ......................................................................................................33 安全閥的泄放壓力 ............................................................................................34 安全閥通道截面積公式 ................................................................