6AV7884-5AA10-4BX0
6AV7884-5AA10-4BX0
6AV7884-5AA10-4BX0
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福建光沃自動化設備有限公司
聯系人 ：歐工（銷售經理）
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常壓塔底重油用泵送入減壓加熱爐，加熱到390-400℃進入減壓分餾塔。塔頂不出產品，分出的不凝氣經冷凝冷卻后，通常用二級蒸汽噴射器抽出不凝氣，使塔內保持殘壓1.33-2.66kPa，以利于在減壓下使油品充分蒸出。塔側從一二側線抽出輕重不同的潤滑油餾分或裂化原料油，它們分別經氣提，換熱冷卻后，一部分可以返回塔作循環回流，一部分送出裝置。塔底減壓渣油也吹入過熱蒸汽氣提出輕組分，提高拔出率后，用泵抽出，經換熱，冷卻后出裝置，可以作為自用燃料或商品燃料油，也可以作為瀝青原料或丙烷脫瀝青裝置的原料，進一步生產重質潤滑油和瀝青。
三、常減壓裝置主要控制回路
原油蒸餾是連續生產過程，一個年處理原油250萬噸的常減壓裝置，一般有130～150個控制回路。下面介紹幾種典型的控制回路。
1、減壓爐
減壓爐0．7MPa蒸汽的分程控制，減壓爐0．7MPa蒸汽的壓力是通過補充1．1MPa蒸汽或向0．4MPa乏氣管網排氣來調節。用DCS控制0．7MPa蒸汽壓力，是通過DCS功能模塊進行計算和判斷，實現蒸汽壓力的分程控制。0．7MPa蒸汽壓力檢測信號送入功能塊調節器，調節器輸出4～12mA段去調節1．1MPa蒸汽入管網調節閥，輸出12～20mA段去調節0．4MPa乏氣管網調節閥。這實際是仿照常規儀表的硬分程方案實現分程調節，以保持0．7MPa蒸汽壓力穩定。
TRANE CSHB175KO*OM 17.6T REFRIGERATION COMPRESSOR 10638全國低價,歡迎來電!
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GE AZ55H12DAB 1 TON PACKAGED AC/HP UNIT 208-230V 15418全國低價,歡迎來電!
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COPELAND ZR125KC-TF7-250 10.5T SCROLL AC/HP COMPRESSOR全國低價,歡迎來電!
GOODMAN ARPF18241 1.5-2 TON MULTI-POSITION FAN COIL全國低價,歡迎來電!
3M VOL-H62P1 HORIZONTAL 62.5/125 2 FIBER PLENUM 3280'全國低價,歡迎來電!
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DAYTON 16 1/2" 115-208-230V ROOF EXHAUST VENTILATOR全國低價,歡迎來電!
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NEXAIN 530645 50 PAIR PLENUM CABLE 838'全國低價,歡迎來電!
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YORK 2PE04703025 3-6 TON POWER EXHAUST 150784全國低價,歡迎來電!
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BLADEX INC 22080086 SHARPS COLLECTOR 159123全國低價,歡迎來電!
KOHLER 505-96 MENDOTA 5' BATH TUB LEFT OUTLET BISCUIT 全國低價,歡迎來電!
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CUNO CWS200ME AQUA-PURE WATER SOFTENER 160663全國低價,歡迎來電!
LIGHT CRIMP SC TERMINATION KIT 147765全國低價,歡迎來電!
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CARRIER 32GA680902 PNEUMATIC CONTROL CONVERSION KIT全國低價,歡迎來電!
