JPH1059706A - Equipment for liquefying carbon dioxide - Google Patents
Equipment for liquefying carbon dioxideInfo
- Publication number
- JPH1059706A JPH1059706A JP8231470A JP23147096A JPH1059706A JP H1059706 A JPH1059706 A JP H1059706A JP 8231470 A JP8231470 A JP 8231470A JP 23147096 A JP23147096 A JP 23147096A JP H1059706 A JPH1059706 A JP H1059706A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- carbon dioxide
- gas
- compressor
- gas line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Carbon And Carbon Compounds (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は二酸化炭素を液化す
る装置に関する。The present invention relates to an apparatus for liquefying carbon dioxide.
【０００２】[0002]
【従来の技術とその問題点】従来の二酸化炭素の液化装
置は、例えば図３に示すような構成のものとしてあっ
て、ガスホルダ２１からの二酸化炭素ガス（以下、炭酸
ガスと呼ぶ）は低圧ガスライン２２により水洗筒２３を
介して二段圧縮機よりなる炭酸ガス圧縮機２４の低圧側
吸入口に送られ、同吐出口から中圧ガスライン２５によ
り脱臭装置２６を経て高圧側吸入口に送られ、さらに同
吐出口からの炭酸ガスは高圧ガスライン２７により除湿
装置２８を経て冷却装置２９へ送られ、この冷却装置で
凝縮、液化されて液化二酸化炭素となり、高圧液ライン
３０によりタンク３１へ送られて貯留されるようになっ
ている。2. Description of the Related Art A conventional liquefaction apparatus for carbon dioxide has a structure as shown in FIG. 3, for example, and carbon dioxide gas (hereinafter referred to as carbon dioxide gas) from a gas holder 21 is a low-pressure gas. It is sent to the low pressure side suction port of the carbon dioxide gas compressor 24 composed of a two-stage compressor via the washing cylinder 23 by the line 22 and sent to the high pressure side suction port via the medium pressure gas line 25 via the deodorizer 26 from the same discharge port. Further, the carbon dioxide gas from the discharge port is sent to a cooling device 29 through a dehumidifying device 28 by a high-pressure gas line 27, and is condensed and liquefied into liquefied carbon dioxide by the cooling device, and is sent to a tank 31 by a high-pressure liquid line 30. It is sent and stored.
【０００３】タンク３１内へ液化二酸化炭素を送るとタ
ンク内の液量が増えてタンク内上部の気相が圧縮される
ので、タンク内の気相圧力が上昇する。When liquefied carbon dioxide is sent into the tank 31, the amount of liquid in the tank increases and the gas phase in the upper part of the tank is compressed, so that the gas pressure in the tank increases.
【０００４】タンク内の気相圧力が冷却装置２９からの
送液圧力より大であるとタンク内への送液ができなくな
るので、従来の液化精製装置においては一端がタンク内
の炭酸ガスを大気に逃がす放出管３２を設けてあって、
圧力調整器３４により検出される気相圧力が所定の値を
超えると同放出管の開閉弁３３が開かれて気相圧力が下
がるようにしていた。なお、図中の符号３５は液化二酸
化炭素の供給ライン、３６は同ラインの開閉弁を示して
いる。If the gas phase pressure in the tank is higher than the pressure of the liquid sent from the cooling device 29, the liquid cannot be sent into the tank. Is provided with a discharge tube 32 to escape to
When the gas pressure detected by the pressure regulator 34 exceeds a predetermined value, the on-off valve 33 of the discharge pipe is opened to lower the gas pressure. In the figure, reference numeral 35 denotes a supply line for liquefied carbon dioxide, and reference numeral 36 denotes an on-off valve of the line.
【０００５】上述した従来の液化装置では、炭酸ガスを
外部に逃がすので、その分の炭酸ガスが無駄になるとい
う問題があった。また、タンク内の気相に液化用の小型
冷凍機を設けて、気相圧力が上昇すると気相の炭酸ガス
を冷却して再液化させるようにしたものもあるが、小型
冷凍機を設ける分、設備費および運転コストが掛かると
いう問題があった。In the above-described conventional liquefaction apparatus, there is a problem that the carbon dioxide gas is wasted because the carbon dioxide gas escapes to the outside. Also, a small refrigerator for liquefaction is provided in the gas phase in the tank, so that when the gas pressure increases, the carbon dioxide in the gas phase is cooled and reliquefied. In addition, there is a problem that the equipment cost and the operation cost are increased.
【０００６】[0006]
【発明の目的】本発明が目的とするところは、二酸化炭
素を外部に逃すような無駄がなく、しかも設備費や運転
コストがあまり掛からない二酸化炭素の液化装置を提供
することにある。SUMMARY OF THE INVENTION It is an object of the present invention to provide a carbon dioxide liquefaction apparatus which does not waste carbon dioxide to the outside and which does not require much equipment cost and operation cost.
【０００７】[0007]
【手段】上述した目的を達成するために本発明に係る二
酸化炭素の液化装置はガスホルダからの低圧ガスライン
を圧縮機の吸入側に接続し、同圧縮機の吐出側からの高
圧ガスラインを冷却装置に接続し、同冷却装置からの高
圧液ラインを液化二酸化炭素の貯留用タンクに接続し、
同タンクの気相に一端が臨む戻りガスラインの他端を前
記圧縮機の吸入側に接続し、かつ、戻りガスラインの途
中に、通常は閉じているが、タンク内の気相圧力が所定
の値を超えると開き、同気相圧力が所定の値まで低下す
ると閉ざされるコントロール弁を設けたものとしてあ
る。To achieve the above object, a liquefaction apparatus for carbon dioxide according to the present invention connects a low pressure gas line from a gas holder to a suction side of a compressor and cools a high pressure gas line from a discharge side of the compressor. Connect the high pressure liquid line from the cooling device to the liquefied carbon dioxide storage tank,
The other end of the return gas line, one end of which faces the gas phase of the tank, is connected to the suction side of the compressor, and is normally closed in the middle of the return gas line. Is provided, and a control valve is provided which is opened when the gas phase pressure drops to a predetermined value and closed when the gas phase pressure decreases to a predetermined value.
【０００８】また、本発明に係る二酸化炭素の液化装置
はガスホルダからの低圧ガスラインを多段圧縮機の低圧
吸入側に接続し、同圧縮機の低圧吐出側からの中圧ガス
ラインを脱臭装置を介して前記圧縮機の高圧吸入側に接
続し、同高圧吐出側からの高圧ガスラインを冷却装置に
接続し、同冷却装置からの高圧液ラインを液化二酸化炭
素の貯留用タンクに接続し、通常は閉じているが、タン
ク内の気相圧力が所定の値を超えると開き、同気相圧力
が所定の値まで低下すると閉ざされるコントロール弁を
前記タンクの気相に一端が臨む戻りガスラインの途中に
設け、同戻りガスラインの他端を前記圧縮機の中圧ライ
ンに接続したものとしてある。In the carbon dioxide liquefaction apparatus according to the present invention, a low pressure gas line from a gas holder is connected to a low pressure suction side of a multistage compressor, and a medium pressure gas line from the low pressure discharge side of the compressor is provided with a deodorizing device. Connected to a high-pressure suction side of the compressor, a high-pressure gas line from the high-pressure discharge side is connected to a cooling device, and a high-pressure liquid line from the cooling device is connected to a liquefied carbon dioxide storage tank. Is closed, but opens when the gas phase pressure in the tank exceeds a predetermined value, and closes when the gas phase pressure decreases to a predetermined value, and closes the control valve of the return gas line, one end of which faces the gas phase of the tank. It is provided on the way, and the other end of the return gas line is connected to the medium pressure line of the compressor.
【０００９】[0009]
【実施例】以下、本発明に係る二酸化炭素の液化精製装
置の実施例を添付図面に示す具体例に基づいて詳細に説
明する。炭酸ガスを貯留するガスホルダ１からの低圧ガ
スライン２は炭酸ガス中の不純物を除去する水洗筒３を
介して二段圧縮機よりなる炭酸ガス圧縮機４の低圧側吸
入口４ａに接続されていて、同圧縮機４の低圧側吐出口
４ｂは中圧ガスライン５により脱臭装置６を介して前記
圧縮機の高圧側吸入口４ｃに接続され、同吐出口４ｄは
高圧ガスライン７により除湿装置８を介して冷却装置９
の炭酸ガス入口９ａに接続されている。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a liquefaction and purification apparatus for carbon dioxide according to the present invention. A low-pressure gas line 2 from a gas holder 1 for storing carbon dioxide gas is connected to a low-pressure side suction port 4a of a carbon dioxide gas compressor 4 composed of a two-stage compressor via a washing cylinder 3 for removing impurities in carbon dioxide gas. The low pressure side discharge port 4b of the compressor 4 is connected to the high pressure side suction port 4c of the compressor by a medium pressure gas line 5 via a deodorizing device 6, and the discharge port 4d is connected to a high pressure gas line 7 for a dehumidifying device 8. Through the cooling device 9
Is connected to the carbon dioxide gas inlet 9a.
【００１０】冷却装置９は高圧ガスライン７からの炭酸
ガスを冷却することにより、凝縮、液化せしめるものと
してあり、例えば図示省略の冷凍機から冷却装置９内の
冷媒コイル９ｃ内に送られる冷媒により炭酸ガスを凝
縮、液化せしめるものとしてある。The cooling device 9 cools the carbon dioxide gas from the high-pressure gas line 7 to condense and liquefy the carbon dioxide gas. For example, the cooling device 9 uses a refrigerant sent from a refrigerator (not shown) to a refrigerant coil 9 c in the cooling device 9. It is intended to condense and liquefy carbon dioxide.
【００１１】冷却装置９の液化二酸化炭素出口９ｂに一
端が接続された高圧液ライン１０の他端は液化二酸化炭
素を貯留する真空断熱タンク１１に接続されていて、同
タンク１１の下部には開閉弁１２を備える液化二酸化炭
素の供給ライン１３の一端が接続されている。The other end of the high-pressure liquid line 10 having one end connected to the liquefied carbon dioxide outlet 9b of the cooling device 9 is connected to a vacuum insulated tank 11 for storing liquefied carbon dioxide. One end of a liquefied carbon dioxide supply line 13 having a valve 12 is connected.
【００１２】しかして、本発明の装置においては、真空
断熱タンク１１内の気相に一端が臨む戻りガスライン１
４の他端を前記炭酸ガス圧縮機４の低圧側吐出口４ｂと
脱臭装置６間の中圧ガスライン５に接続してある。Thus, in the apparatus of the present invention, the return gas line 1 having one end facing the gas phase in the vacuum insulated tank 11.
The other end of 4 is connected to a medium pressure gas line 5 between the low pressure side discharge port 4 b of the carbon dioxide gas compressor 4 and the deodorizing device 6.
【００１３】前記戻りガスライン１４の途中には、通常
は閉じているが、タンク１１内の気相圧力が所定の値を
超えると開き、気相圧力が所定の値まで低下すると閉じ
るコントロール弁１５を設けてあって、このコントロー
ル弁１５は真空断熱タンク１１の気相圧力を検知する圧
力調整器１６によって開閉制御されるようになってお
り、前記コントロール弁１５はオリフィス流量係数が所
要の値に定められて運転上支障なく制御できるものとし
てあり、このコントロール弁には、例えばリニア制御弁
や、あるいはオリフィス等の絞り装置と自動開閉弁を組
み合わせたものを使用する。A control valve 15 which is normally closed in the middle of the return gas line 14, opens when the gas phase pressure in the tank 11 exceeds a predetermined value, and closes when the gas phase pressure decreases to a predetermined value. The control valve 15 is controlled to be opened and closed by a pressure regulator 16 for detecting the gas phase pressure of the vacuum adiabatic tank 11, and the control valve 15 has an orifice flow coefficient at a required value. For example, a linear control valve or a combination of a throttle device such as an orifice and an automatic open / close valve is used as the control valve.
【００１４】次に上述した構成による本発明に係る装置
の作用を説明する。ガスホルダ１からの炭酸ガスは低圧
ガスライン２により水洗筒３で不純物が除去されて炭酸
ガス圧縮機４の低圧側吸入口４ａに送られて同吐出口４
ｂから吐出され、中圧ガスライン５により脱臭装置６で
脱臭されて圧縮機４の高圧側吸入口４ｃに送られ、同吐
出口４ｄから吐出される。Next, the operation of the apparatus according to the present invention having the above-described configuration will be described. The carbon dioxide gas from the gas holder 1 is subjected to low pressure gas line 2 to remove impurities in the water washing cylinder 3 and sent to the low pressure side suction port 4a of the carbon dioxide gas compressor 4 to be discharged therefrom.
b, is deodorized by the deodorizing device 6 by the medium pressure gas line 5, is sent to the high pressure side suction port 4c of the compressor 4, and is discharged from the same discharge port 4d.
【００１５】高圧側吐出口４ｄからの炭酸ガスは高圧ガ
スライン７により除湿装置５で水分が除去され、冷却装
置９へ送られて凝縮、液化される。冷却装置９からの液
化二酸化炭素は高圧液ライン１０により真空断熱タンク
１１へ送られ、同タンク内に貯留される。同タンク１１
内の液化二酸化炭素はタンクの下部に接続された供給ラ
イン１３から開閉弁１２を操作することにより適宜取り
出すことができるようになっている。The carbon dioxide gas from the high pressure side discharge port 4d is removed by a dehumidifier 5 through a high pressure gas line 7 and sent to a cooling device 9 where it is condensed and liquefied. The liquefied carbon dioxide from the cooling device 9 is sent to the vacuum insulated tank 11 by the high-pressure liquid line 10 and stored in the tank. Same tank 11
The liquefied carbon dioxide inside can be appropriately taken out by operating the on-off valve 12 from the supply line 13 connected to the lower part of the tank.
【００１６】タンク１１内の気相圧力は圧力調整器１６
によって検出されるようになっていて、液化二酸化炭素
が高圧液ライン１０からタンク１１内へに送り込まれる
ことにより気相圧力が所定の値を超えると、圧力調整器
１６からの指令によりコントロール弁１５が開成し、タ
ンク内の炭酸ガスは戻りガスライン１４に流れ込んでタ
ンク内の気相圧力が低下する。気相圧力が所定の値まで
低下すると、圧力調整器１６によりコントロール弁が閉
ざされる。The gas phase pressure in the tank 11 is controlled by a pressure regulator 16.
When the liquefied carbon dioxide is sent from the high-pressure liquid line 10 into the tank 11 and the gas phase pressure exceeds a predetermined value, the control valve 15 receives a command from the pressure regulator 16. Is opened, the carbon dioxide gas in the tank flows into the return gas line 14, and the gas phase pressure in the tank decreases. When the gas pressure drops to a predetermined value, the control valve is closed by the pressure regulator 16.
【００１７】タンク１１内から戻りガスライン１４に流
れ込んだ炭酸ガスは、中圧ガスライン５に送り返され、
圧縮機４の低圧側吐出口４ｂからの炭酸ガスとともに高
圧ガスライン７で冷却装置９に送られて液化し、高圧液
ライン１０によりタンク１１へ送られる。The carbon dioxide gas flowing from the tank 11 to the return gas line 14 is sent back to the medium-pressure gas line 5,
The carbon dioxide gas from the low pressure side discharge port 4b of the compressor 4 is sent to the cooling device 9 via the high pressure gas line 7 to be liquefied, and then sent to the tank 11 via the high pressure liquid line 10.
【００１８】なお、上述した実施例ではタンク内の気相
からの戻りガスラインを中圧ガスライン５における炭酸
ガス圧縮機４の低圧側吐出口４ｂと脱臭装置６間に接続
してあるが、図２に示すように脱臭装置６と炭酸ガス圧
縮機４の高圧側吸入口４ｃ間の中圧ガスラインに接続し
てもよい。In the embodiment described above, the return gas line from the gas phase in the tank is connected between the low pressure side discharge port 4b of the carbon dioxide gas compressor 4 in the medium pressure gas line 5 and the deodorizing device 6. As shown in FIG. 2, it may be connected to a medium pressure gas line between the deodorizing device 6 and the high pressure side suction port 4 c of the carbon dioxide gas compressor 4.
【００１９】[0019]
【発明の作用、効果】本発明に係る二酸化炭素の液化装
置は上述した構成のものとしてあるので、次の作用、効
果を奏し得る。炭酸ガス圧縮機で圧縮された炭酸ガスは
冷却装置で凝縮、液化されて液化二酸化炭素になり、タ
ンクに送られて貯留される。Since the apparatus for liquefying carbon dioxide according to the present invention has the above-described configuration, the following functions and effects can be obtained. The carbon dioxide gas compressed by the carbon dioxide compressor is condensed and liquefied into liquefied carbon dioxide by a cooling device, sent to a tank, and stored.
【００２０】同タンクに液化二酸化炭素が送り込まれる
ことによりタンク内の気相圧力が所定の値を超えると、
圧力調整器からの信号により戻りガスラインに設けられ
たコントロール弁が開成され、戻りガスラインにより炭
酸ガスが圧縮機の吸入側へ送り返され、タンク内の気相
圧力が低下する。When liquefied carbon dioxide is fed into the tank and the gas phase pressure in the tank exceeds a predetermined value,
A control valve provided in the return gas line is opened by a signal from the pressure regulator, and the return gas line sends carbon dioxide gas back to the suction side of the compressor, thereby reducing the gas phase pressure in the tank.
【００２１】したがって、タンク内の気相圧力が低下し
た分、液化二酸化炭素をタンク内に送り込むことがで
き、より詳しくは−２０℃における飽和二酸化炭素の液
化重量が１０３０kg／ｍ3 であるのに対してガス比重が
５１．４kg／ｍ3 であるから、例えば、タンク内から戻
りガスラインにより１ｍ3 （５１．４kg）の炭酸ガスを
圧縮機へ送り返すと、１，０３０kgの液化二酸化炭素を
タンク内に送り込むことができる。Therefore, the liquefied carbon dioxide can be sent into the tank by an amount corresponding to the decrease in the gas phase pressure in the tank. More specifically, even though the liquefied weight of saturated carbon dioxide at -20 ° C. is 1030 kg / m 3. On the other hand, since the gas specific gravity is 51.4 kg / m 3 , for example, when 1 m 3 (51.4 kg) of carbon dioxide gas is returned to the compressor from the tank through the return gas line, 1,030 kg of liquefied carbon dioxide is stored in the tank. Can be sent inside.
【図１】本発明に係る液化装置の実施例を示す系統図。FIG. 1 is a system diagram showing an embodiment of a liquefaction apparatus according to the present invention.
【図２】本発明に係る液化装置の他の実施例を示す系統
図。FIG. 2 is a system diagram showing another embodiment of the liquefaction apparatus according to the present invention.
【図３】従来の液化装置の一例を示す系統図。FIG. 3 is a system diagram showing an example of a conventional liquefaction apparatus.
１ ガスホルダ ２ 低圧ガスライン ３ 水洗筒 ４ 炭酸ガス圧縮機 ４ａ 低圧側吸入口 ４ｂ 低圧側吐出口 ４ａ 高圧側吸入口 ４ｂ 高圧側吐出口 ５ 中圧ガスライン ６ 脱臭装置 ７ 高圧ガスライン ８ 除湿装置 ９ 冷却装置 １０ 高圧液ライン １１ 真空断熱タンク １２ 開閉弁 １３ 液化二酸化炭素の供給ライン １４ 戻りガスライン １５ コントロール弁 １６ 圧力調整器 DESCRIPTION OF SYMBOLS 1 Gas holder 2 Low pressure gas line 3 Rinse cylinder 4 Carbon dioxide compressor 4a Low pressure side suction port 4b Low pressure side discharge port 4a High pressure side suction port 4b High pressure side discharge port 5 Medium pressure gas line 6 Deodorizer 7 High pressure gas line 8 Dehumidifier 9 Cooling device 10 High-pressure liquid line 11 Vacuum insulated tank 12 Open / close valve 13 Supply line of liquefied carbon dioxide 14 Return gas line 15 Control valve 16 Pressure regulator
Claims (2)
の吸入側に接続し、同圧縮機の吐出側からの高圧ガスラ
インを冷却装置に接続し、同冷却装置からの高圧液ライ
ンを液化二酸化炭素の貯留用タンクに接続し、同タンク
の気相に一端が臨む戻りガスラインの他端を前記圧縮機
の吸入側に接続し、かつ、戻りガスラインの途中に、通
常は閉じているが、タンク内の気相圧力が所定の値を超
えると開き、同気相圧力が所定の値まで低下すると閉ざ
されるコントロール弁を設けてなる二酸化炭素の液化装
置。1. A low-pressure gas line from a gas holder is connected to a suction side of a compressor, a high-pressure gas line from a discharge side of the compressor is connected to a cooling device, and a high-pressure liquid line from the cooling device is liquefied dioxide. It is connected to a tank for storing carbon, the other end of the return gas line whose one end faces the gas phase of the tank is connected to the suction side of the compressor, and is normally closed in the middle of the return gas line. A carbon dioxide liquefaction apparatus provided with a control valve that opens when the gas phase pressure in the tank exceeds a predetermined value and is closed when the gas phase pressure decreases to a predetermined value.
縮機の低圧吸入側に接続し、同圧縮機の低圧吐出側から
の中圧ガスラインを脱臭装置を介して前記圧縮機の高圧
吸入側に接続し、同高圧吐出側からの高圧ガスラインを
冷却装置に接続し、同冷却装置からの高圧液ラインを液
化二酸化炭素の貯留用タンクに接続し、通常は閉じてい
るが、タンク内の気相圧力が所定の値を超えると開き、
同気相圧力が所定の値まで低下すると閉ざされるコント
ロール弁を前記タンクの気相に一端が臨む戻りガスライ
ンの途中に設け、同戻りガスラインの他端を前記圧縮機
の中圧ラインに接続してなる二酸化炭素の液化装置。2. A low-pressure gas line from a gas holder is connected to a low-pressure suction side of a multi-stage compressor, and a medium-pressure gas line from a low-pressure discharge side of the compressor is connected to a high-pressure suction side of the compressor via a deodorizing device. The high pressure gas line from the high pressure discharge side is connected to the cooling device, and the high pressure liquid line from the cooling device is connected to the liquefied carbon dioxide storage tank. Open when the phase pressure exceeds a predetermined value,
A control valve, which is closed when the gas phase pressure decreases to a predetermined value, is provided in the middle of a return gas line having one end facing the gas phase of the tank, and the other end of the return gas line is connected to the medium pressure line of the compressor. A liquefaction device for carbon dioxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23147096A JP3608882B2 (en) | 1996-08-13 | 1996-08-13 | Carbon dioxide liquefaction equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23147096A JP3608882B2 (en) | 1996-08-13 | 1996-08-13 | Carbon dioxide liquefaction equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1059706A true JPH1059706A (en) | 1998-03-03 |
| JP3608882B2 JP3608882B2 (en) | 2005-01-12 |
Family
ID=16924009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23147096A Expired - Lifetime JP3608882B2 (en) | 1996-08-13 | 1996-08-13 | Carbon dioxide liquefaction equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3608882B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004269346A (en) * | 2002-10-02 | 2004-09-30 | Boc Group Inc:The | Method and apparatus for producing purified and pressurized liquid carbon dioxide stream |
-
1996
- 1996-08-13 JP JP23147096A patent/JP3608882B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004269346A (en) * | 2002-10-02 | 2004-09-30 | Boc Group Inc:The | Method and apparatus for producing purified and pressurized liquid carbon dioxide stream |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3608882B2 (en) | 2005-01-12 |
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