NATURAL GAS LIQUEFACTION PROCESS

Hereinafter drawing of attached in reference to. rapidly and to reduce a memory a of the present invention preferred embodiment. However in the embodiment of the present invention is hereinafter number by one or limited not.

Also in the embodiment according to one of the present invention Figure 1 shows a natural gas liquefaction process is that the flow and. The liquefaction process in the embodiment according to one of the present invention as far as shown in Figure 1 two 3 using refrigerating cycle (refrigeration cycle) for liquefying a natural gas (NG) cooling the liquefied natural gas (LNG) the process of producing can be applied to the.

More specifically, the present in the embodiment according to the liquefaction process, the heat exchanging area number 1 (111) for cooling an feed stream in cooling step number 1, number 2 the heat exchanging area (112) for cooling an feed stream in cooling step number 2, number 3 and the heat exchanging area (113) for cooling an in feed stream includes cooling step number 3. Supply stream can be natural gas. Reproduction mode by such sequential in a natural gas cooling may be cooling and precooling is liquefied.

With reference to, 3 of the heat exchanging area are of 1 may be provided within the heat exchanger, or separate within the heat exchanger may be provided separately from the vehicle. Wherein a heat exchanger PFHE (Plate Fin Heat Exchanger) types of heat exchanger or SWHE (Spiral Wound Heat Exchanger) types of heat exchanger and can be heat exchanger imbalance of the laundry the actuating lever.

Using the refrigerant carbon dioxide cooling step number 1 number 1 refrigeration cycle through the cooling feed stream. Carbon dioxide refrigerant (Co2), including, but mainly carbon dioxide, further includes small amounts of impurities may be loaded with. Just, carbon dioxide refrigerant. most preferably is including only carbon dioxide. The present in the embodiment of the carbon dioxide in the refrigerant for liquefying a feed stream can be put into from liquefaction plants..

A liquefaction plants and then digging natural gas, crude taxol as plant liquefy the same, terrestrial or marine is inserted into the pin grooves KIPO &. Liquefaction plants typically gas by using aqueous natural gas to driving turbine. State of the SP heads and exhaust one of the gas turbine the exhaust gas is usually includes carbon dioxide. This the separate carbon dioxide from waste exhaust gas number 1 of refrigerating cycle can be utilized as a refrigerant. Natural gas and a mode in which impurities obtained in advance before the liquefied for vertically long number is pre-treated. During pretreatment such as a carbon dioxide as impurities also can be for producing a sedated number, number 1 of refrigerating cycle same may utilize as refrigerant. The present in the embodiment according to liquefaction process solid formulation as well as to the liquefaction plants carbon dioxide to carbon dioxide as refrigerant discharged from semiconductor production units as number 1 can be supply refrigeration cycle.

A methane cooling step number 2 number 2 refrigeration cycle using the refrigerant through the cooling feed stream. Methane refrigerant (methane), including, but mainly methane, further includes small amounts of impurities may be loaded with. The present in the embodiment methane at. the source gas may be furnished from feed stream refrigerant.

Natural gas generally methane, ethane, propane, butane includes or the like. State of the SP heads and natural gas typically included a primary most methane. Thus feed stream can be utilized as a refrigerant are methanized, the at least a portion of a supply liquefaction process in the embodiment according to methane as refrigerant able to supply to KIPO & refrigeration cycle number 2. Liquefaction process is when operational, in a case of a lack of refrigerant portion of feed stream to refill the number 2 the material filled in the refrigeration cycle rectifier, liquefaction process is actuated when initiating the number 2 senses whether the floor passing velocity standard for all feed stream able to supply to KIPO & refrigeration cycle. And the feed stream is the material filled in the refrigeration cycle before refrigeration by carbon, or after cooling can be supply refrigeration cycle number 2.

With reference to, a three-dimensional results user gear the present invention, during the entire natural gas when comprising at least 80% methane, the present in the embodiment according to liquefaction process in a proper system for a natural gas methane even utilized as a refrigerant, the heat exchanging area number 2 (112) plate sufficient cooling the by-products can be has been confirmed.

Using the refrigerant nitrogen cooling step number 3 number 3 refrigeration cycle through the cooling feed stream. Nitrogen refrigerant, including, but nitrogen (nitrogen), further includes small amounts of impurities may be loaded with. Just, nitrogen refrigerant. most preferably is including only nitrogen. The present in the embodiment can be put into from air refrigerant nitrogen in.. Air nitrogen, oxygen, carbon dioxide, includes such as hydrogen. Thus separating nitrogen from air, various the current method thereof is disclosure. The present in the embodiment according to liquefaction process solid formulation as well as to the nitrogen as refrigerant nitrogen from air able to supply to KIPO & refrigeration cycle number 3.

The present in the embodiment according to liquefaction process sequence using the refrigerant carbon dioxide as longitude refrigeration cycle number 1, number 2 refrigeration cycle using refrigerant methane, and nitrogen employing the refrigerant through refrigeration cycle number 3. for liquefying feed stream. State of the SP heads and carbon dioxide refrigerant from liquefaction plants, methane refrigerant from a natural gas, nitrogen and. can be put into from air refrigerant.

If the liquefaction process in the embodiment according to which is highly safe water level refrigerant space telephon number that unit is off. In the prior art conventional for replenishment - adsorbers two to store a refrigerant, because the combustible generally refrigerant, refrigerant is safe that stored separately and are in not go side of. In addition the storage in the prior art conventional additional requisite storing - adsorbers, side of the detachably in not go. The present in the embodiment according to liquefaction process such includes a door number to solve is intended to. I.e., the present in the embodiment according to liquefaction process the refrigerant and, in supplement compares or minimize the storage of refrigerant, making it in that unnecessary or technical features KIPO &. It further in the embodiment according to liquefaction process a non combustible carbon dioxide and nitrogen refrigerant of time and thus utilized as a accordingly, the side of. highly desirable.

Number 1 refrigeration cycle (C1) in particular can be described as follows: an. Carbon dioxide refrigerant first compression means (121) is compressed by.

, Such as shown in Figure 2, compression means (121, 123) imbalance of the laundry the actuating lever which may be compressor (compressor), can be multistage. In one example, plurality of compression means (123) is connected at the first side of are sequentially, compression means (123) and compression means (123) between the cooling means (133) can be equipped by.. As such compression means (123) in case multi-stage compression is the total compression means when the hood or bonnet to be lifted KIPO & efficiency of. The the after alcoholic beverage it will do other. similar to that of the compression means. Then conduit refrigerant carbon dioxide (211) through which the cooling means (131) to enter the is cooled. Wherein cooling means (131) the liquid cooled or can be cooled of a refrigerator (cooler). The the after alcoholic beverage it will do other cool means. similar to that of the.

Then carbon dioxide refrigerant conduit (212) through expansion means (141) is expansion process are introduced into. Thereby both pressure and the temperature are refrigerant carbon dioxide can be lowered.. Wherein expansion means the j-T(joule-thomson) valve can be. For example, expansion valve of conventional expansion means (expansion valve) can be. Line - Thompson valve a j-T through the effect and the pressure and temperature of refrigerant can be lowering both the.

Then carbon dioxide refrigerant conduit (213) through the heat exchanging area number 1 (111) to enter the number 1 the heat exchanging area (111) includes a projection part curved upward and precooling feed stream in. Conduit (213) number 1 through the heat exchanging area (111) enters the carbon dioxide refrigerant, conduit (222) number 1 through the heat exchanging area (111) methane refrigerant enters the, conduit (232) number 1 through the heat exchanging area (111) with a stream of supply coolant nitrogen enters the. cooling. The conduit after cooling the refrigerant carbon dioxide (214) again through a compression means (121) is introduced into.

With reference to, the conduits different digital drawing may be conduit each other may be conduit such as. I.e., of a heat exchanger 1 for facilitating of even 2 of the drawing may be S160. 2 in contrast to a spatially-or of even of a heat exchanger 1 for facilitating the drawing of S160 may be.

Number 2 refrigeration cycle (C2) in particular can be described as follows: an. Methane refrigerant first compression means (122) is compressed by. Then methane refrigerant conduit (221) through which the cooling means (132) to enter the is cooled. Wherein cooling means (132) the can be optionally provided. Then methane refrigerant conduit (222) through the heat exchanging area number 1 (111) to enter the carbon dioxide is cooled to safer.

Then methane refrigerant conduit (223) through expansion means (142) is expansion process are introduced into. Both pressure and the temperature are refrigerant methane thereby can be lowered.. Wherein expansion means (142) which expands the one refrigerant methane (work expanding) turbo expander (turbo expander) can be. Turbo [...] methane coolant can be work during. One such additional the power from the commercial voltage source may generate KIPO &.

Number 2 refrigeration cycle such a expansion means by employing inverse toe ach of the frames (Reverse Brayton) cycle platen. may be based on. Platen cycle inverse toe ach of the frames and gaseous liquid refrigerant cycles in the case of thereby inducing a phase change not between. Holds the vapor typically refrigerant.

Then methane refrigerant conduit (224) number 2 through the heat exchanging area (112) to enter the number 2 the heat exchanging area (112) in. for liquefying feed stream. Conduit (224) number 2 through the heat exchanging area (112) enters the methane refrigerant, conduit (233) number 2 through the heat exchanging area (112) with a stream of supply coolant nitrogen enters the. cooling. The conduit after cooling the refrigerant methane (225) again through a compression means (122) is introduced into.

Number 3 refrigeration cycle (C3) in particular can be described as follows: an. Nitrogen refrigerant first compression means (123) is compressed by. Then nitrogen refrigerant conduit (231) through which the cooling means (133) to enter the is cooled. Wherein cooling means (133) the can be optionally provided. Then nitrogen refrigerant conduit (232) through the heat exchanging area number 1 (111) to enter the carbon dioxide is cooled to safer. Then nitrogen refrigerant conduit (233) number 2 through the heat exchanging area (112) to enter the methane is cooled to safer.

Then nitrogen refrigerant conduit (234) through expansion means (143) is expansion process are introduced into. Both pressure and the temperature are refrigerant nitrogen thereby can be lowered.. Wherein expansion means (143) nitrogen may [...] turbo which expands the one refrigerant. Turbo [...] nitrogen coolant can be work during. One such additional the power from the commercial voltage source may generate KIPO &. Such a refrigeration cycle number 3 expansion means by employing inverse toe ach of the frames may be based on platen cycle..

Then nitrogen refrigerant conduit (235) through the heat exchanging area number 3 (113) to enter the number 3 the heat exchanging area (113) includes a projection part curved upward and cooling feed stream in. The conduit after cooling the refrigerant nitrogen (236) again through a compression means (123) is introduced into.

Such feed stream a series routing process, the. can be liquefied. Even after liquefied such as a vapor partial in a feed stream can be including part of. Is such a case separating means (151) and gaseous liquid fraction feed stream through as only liquidus portion and then stored as liquefied natural gas tank can store the values in a KIPO & (not shown). Where the separating means (151) gas-liquid separator of the laundry the actuating lever can be (vapor-liquid separator).

On the other hand, [table 1] down liquefaction process of Figure 1 operating-like refrigerant, and a moment when a computer simulation results as Figure 3. As far as shown in Figure 3, feed stream (Hot Composite) a carbon dioxide safer the highest temperatures is cooled in (reference S1), methane is cooled in safer (reference S2) formed and as over an intermediate temperature, safer nitrogen is cooled at a temperature lowest (S3 reference). The efficiency of the liquefaction process such a case is 0. 4301 kwh/kg by excellent shown.