JP2016080297A - 深冷空気分離装置及び深冷空気分離方法 - Google Patents
深冷空気分離装置及び深冷空気分離方法 Download PDFInfo
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Abstract
【解決手段】高圧塔15a及び低圧塔15bを備えた精留塔15と、高圧塔15aで分離された窒素を凝縮して液化する熱交換器24を備え、熱交換器24で液化した窒素を高圧塔15aに還流させる主凝縮器15cと、低圧塔15bから供給されるアルゴン原料ガスから粗アルゴンガスを生成する粗アルゴン塔16と、を有する深冷空気分離システム1は、高圧塔15a底部の液体空気中の酸素濃度、または高圧塔15aに供給される原料空気中の酸素濃度の少なくともいずれかを測定する酸素濃度測定機構50、60と、高圧塔15aの底部に主凝縮器15c内の液体酸素を供給する液体酸素ポンプ52と、液体酸素ポンプ52から高圧塔15aへの液体酸素の供給量を制御する酸素流量調節弁53と、を有している。
【選択図】図1
Description
10 吸入フィルタ
11 原料空気圧縮機
12 水洗冷却塔
13 MS吸着器
14 主熱交換器
15 精留塔
15a 高圧部
15b 低圧部
15c 主凝縮器
16 粗アルゴン塔
20 原料空気管
20a 分岐管
21 膨張タービン
21a コンプレッサ
22 液体酸素管
23 頂部窒素管
24 熱交換器
25 頂部還流管
26 中部還流管
27 気液熱交換器
28 酸素導入管
29 第1の液体空気管
30 第2の液体空気管
31 製品窒素抽出管
32 製品酸素抽出管
33 廃窒素抽出管
34 アルゴン原料ガス管
35 第3の液体空気管
40 コンデンサ
41 空気導入管
50 酸素濃度測定機構
51 液体酸素管
52 液体酸素ポンプ
53 酸素流量調節弁
60 酸素濃度測定機構
70 液体酸素供給源
80、81 熱交換器
Claims (10)
- 空気圧縮機で圧縮された原料空気から製品窒素及製品酸素を生成する高圧塔及び低圧塔を備えた精留塔と、前記高圧塔で分離された窒素を凝縮して液化する熱交換器を備え、当該熱交換器で液化した窒素を高圧塔に還流させる主凝縮器と、前記低圧塔から供給されるアルゴン原料ガスから粗アルゴンガスを生成する粗アルゴン塔と、を有する深冷空気分離装置であって、
前記高圧塔底部の液体空気中の酸素濃度、または前記高圧塔に供給される原料空気中の酸素濃度の少なくともいずれかを測定する酸素濃度測定機構と、
前記高圧塔の底部に液体酸素を供給する液体酸素供給源と、
前記液体酸素供給源から前記高圧塔への液体酸素の供給量を制御する酸素流量制御機構と、
前記酸素濃度測定機構の測定結果に基づいて、前記酸素流量制御機構を制御する制御装置と、を有することを特徴とする、深冷空気分離装置。 - 前記液体酸素供給源は、前記主凝縮器であることを特徴とする、請求項1に記載の深冷空気分離装置。
- 前記液体酸素供給源は、前記主凝縮器内の液体酸素を圧送するポンプを有していることを特徴とする、請求項2に記載の深冷空気分離装置。
- 前記主凝縮器に液体酸素を供給する他の液体酸素供給源を更に備えていることを特徴とする、請求項2または3のいずれか一項に記載の深冷空気分離装置。
- 前記高圧塔の底部に接続され、前記高圧塔内の液体空気を前記粗アルゴン塔に供給する液体空気供給管と、
前記空気圧縮機から供給される原料空気の一部を膨張タービンへ導く分岐管と、を有し、
前記液体空気供給管内の流体と、前記分岐管内の前記膨張タービンへ流入する前の流体との間で熱交換を行う気液熱交換器と、をさらに有することを特徴とする、請求項1〜4のいずれか一項に記載の深冷空気分離装置。 - 空気圧縮機で圧縮された原料空気から製品窒素及製品酸素を生成する高圧塔及び低圧塔を備えた精留塔と、前記高圧塔で分離された窒素を凝縮して液化する熱交換器を備え、当該熱交換器で液化した窒素を高圧塔に還流させる主凝縮器と、前記低圧塔から供給されるアルゴン原料ガスから粗アルゴンガスを生成する粗アルゴン塔と、を有する深冷空気分離装置における深冷空気分離方法であって、
前記深冷空気分離装置は、前記高圧塔の底部に液体酸素を供給する液体酸素供給源をさら備え、
前記高圧塔底部の液体空気中の酸素濃度、または前記高圧塔に供給される原料空気中の酸素濃度の少なくともいずれかを測定し、
前記酸素濃度の測定結果に基づいて、前記高圧塔の底部への液体酸素の供給量を制御することを特徴とする、深冷空気分離方法。 - 前記液体酸素供給源は、前記主凝縮器であることを特徴とする、請求項6に記載の深冷空気分離方法。
- 前記主凝縮器内の液体酸素をポンプにより前記高圧塔の底部に圧送することを特徴とする、請求項7に記載の深冷空気分離方法。
- 前記主凝縮器から前記高圧塔への液体酸素の供給に伴い、他の液体酸素供給源から前記主凝縮器へ液体酸素を供給することを特徴とする、請求項7または8のいずれか一項に記載の深冷空気分離方法。
- 前記深冷空気分離装置は、
前記高圧塔の底部に接続され、前記高圧塔内の液体空気を前記粗アルゴン塔に供給する液体空気供給管と、
前記空気圧縮機から供給される原料空気の一部を膨張タービンへ導く分岐管と、を有し、
液体空気供給管内の流体と、前記分岐管内の前記膨張タービンへ流入する前の流体との間で熱交換を行う気液熱交換器と、をさらに有し、
前記液体酸素供給源から前記高圧塔に液体酸素を供給したときに、前記気液熱交換器で前記液体空気供給管内の流体と、前記分岐管内の前記膨張タービンへ流入する前の流体との間で熱交換を行うことを特徴とする、請求項6〜9のいずれか一項に記載の深冷空気分離方法。
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Cited By (4)
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JP2018096645A (ja) * | 2016-12-15 | 2018-06-21 | 新日鐵住金株式会社 | 空気液化分離方法および空気液化分離装置 |
CN113639200A (zh) * | 2021-08-16 | 2021-11-12 | 南京钢铁股份有限公司 | 一种化工厂高压氧气并入钢铁厂中压氧气管网的管路系统及方法 |
JP2022029786A (ja) * | 2020-08-05 | 2022-02-18 | エア・ウォーター・クライオプラント株式会社 | 空気分離装置、酸素および/または窒素の製造方法 |
CN114812097A (zh) * | 2022-04-22 | 2022-07-29 | 杭州特盈能源技术发展有限公司 | 一种跨流程高契合度耦合低能耗高氮制取工艺 |
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JP2022029786A (ja) * | 2020-08-05 | 2022-02-18 | エア・ウォーター・クライオプラント株式会社 | 空気分離装置、酸素および/または窒素の製造方法 |
JP7339929B2 (ja) | 2020-08-05 | 2023-09-06 | エア・ウォーター・エンジニアリング株式会社 | 空気分離装置、酸素および/または窒素の製造方法 |
CN113639200A (zh) * | 2021-08-16 | 2021-11-12 | 南京钢铁股份有限公司 | 一种化工厂高压氧气并入钢铁厂中压氧气管网的管路系统及方法 |
CN114812097A (zh) * | 2022-04-22 | 2022-07-29 | 杭州特盈能源技术发展有限公司 | 一种跨流程高契合度耦合低能耗高氮制取工艺 |
CN114812097B (zh) * | 2022-04-22 | 2023-02-03 | 杭州特盈能源技术发展有限公司 | 一种跨流程高契合度耦合低能耗高氮制取工艺 |
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