CN202853257U - Natural gas mixed refrigerant liquefying device adopting promoting technology of liquid phase refrigerant - Google Patents
Natural gas mixed refrigerant liquefying device adopting promoting technology of liquid phase refrigerant Download PDFInfo
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- CN202853257U CN202853257U CN 201220467600 CN201220467600U CN202853257U CN 202853257 U CN202853257 U CN 202853257U CN 201220467600 CN201220467600 CN 201220467600 CN 201220467600 U CN201220467600 U CN 201220467600U CN 202853257 U CN202853257 U CN 202853257U
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Abstract
The utility model relates to a natural gas mixed refrigerant liquefying device adopting promoting technology of liquid phase refrigerant potential energy. The natural gas mixed refrigerant liquefying device comprises a gas-liquid separation tank and a cooling box. A gas phase pipeline and a liquid phase pipeline are arranged between inlets of the top portions of the gas-liquid separation tank and the cooling box. The natural gas mixed refrigerant liquefying device is characterized in that the gas phase pipeline and the liquid phase pipeline are communicated with each other before entering the cooling box, and a throttle valve is arranged on the gas phase pipeline.
Description
Technical field
The utility model relates to a kind of natural gas mix refrigerant liquefying plant that promotes liquid phase cryogen technology that adopts, and belongs to the liquefaction Technology of Natural Gas field.
Background technology
The mix refrigerant liquefaction process is one of the most frequently used natural gas liquefaction process, and this technique comprises azeotrope circulation technology and natural gas technique.
In the azeotrope circulation, liquid azeotrope enters the main heat exchanger that carries out heat exchange with natural gas dual mode, a kind of is between separator liquid phase outlet and the import of azeotrope main heat exchanger liquor pump to be set, and the import of azeotrope main heat exchanger is delivered in pressurization to liquid; Another is high the separator frame, so that the height of separator liquid phase outlet is higher than azeotrope main heat exchanger inlet height, utilizes the gravity of liquid refrigerant self to flow to main heat exchanger.
The disclosed technical scheme of CN101608860A belongs to first kind of way (seeing Fig. 1).This technical scheme is that the azeotrope 7 that utilizes liquor pump (700) that separator (600) is separated carries out supercharging, so that azeotrope (8) enters the main heat exchanger that azeotrope and natural gas carry out heat exchange.But, adopt this technical scheme need to settle liquor pump, increased equipment investment and power consumption.
The disclosed technical scheme of CN101893367A belongs to the second way (seeing Fig. 2).This technical scheme is by high separator (24) frame, make the position of separator liquid phase outlet be higher than the main heat exchanger entrance location that azeotrope and natural gas carry out heat exchange, so that the liquid that separator (24) is separated flow to the azeotrope import of main heat exchanger top by self gravitation.This technical scheme has requirement to the riding position of separator, lays to lack flexibility.
The utility model content
For solving the problems of the technologies described above, the purpose of this utility model is to provide a kind of natural gas mix refrigerant liquefying plant that promotes liquid phase cryogen technology that adopts, the gas phase cryogen pipeline of this device is provided with choke valve, do not need for the liquid phase cryogen arranges the potential energy that pump just can improve the liquid phase cryogen, realize that the liquid phase cryogen is by the conveying of lower position to the higher position.
For achieving the above object, the utility model provides a kind of natural gas mix refrigerant liquefying plant that promotes liquid phase cryogen technology that adopts, it comprises knockout drum and ice chest, be provided with gas phase pipeline and liquid pipe between the top entrance of described knockout drum and ice chest, it is characterized in that, described gas phase pipeline and liquid pipe were connected together before entering described ice chest, and described gas phase pipeline is provided with choke valve.
Technical scheme provided by the utility model mainly is adopt to promote liquid phase cryogen technology, and this technology is by at gas phase cryogen pipeline choke valve being set, and does not adopt other equipment and realizes the gas-liquid two-phase cryogen is delivered to the function of ice chest top entrance.For other parts of liquefying plant, all can carry out in a conventional manner.
According to specific embodiments of the present utility model, promote in the natural gas mix refrigerant liquefying plant of liquid phase cryogen technology in above-mentioned employing, preferably, the outlet of the gas phase cryogen of described knockout drum and the outlet of liquid phase cryogen all are lower than the top entrance of described ice chest.
According to specific embodiments of the present utility model, promote in the natural gas mix refrigerant liquefying plant of liquid phase cryogen technology in above-mentioned employing, preferably, the difference in height between the top entrance of the outlet of the liquid phase cryogen of described knockout drum and described ice chest is 5-30 rice.
According to specific embodiments of the present utility model, preferably, the natural gas mix refrigerant liquefying plant that above-mentioned employing promotes liquid phase cryogen technology comprises compressor, heat exchanger, knockout drum, ice chest, heavy hydrocarbon separator, wherein,
Described ice chest has three runners, is respectively first flow, the second runner and the 3rd runner;
The outlet of described compressor is connected by pipeline with the entrance of described heat exchanger;
The outlet of described heat exchanger is connected by pipeline with the entrance of described knockout drum;
The gas vent of described knockout drum is connected by the gas phase pipeline with the entrance of the 3rd runner of described ice chest, and the liquid outlet of described knockout drum is connected by liquid pipe with the entrance of the 3rd runner of described ice chest;
The outlet of described the 3rd runner is connected by pipeline with the entrance of described the second flow field end, and the pipeline between the two is provided with choke valve, and this choke valve is positioned at the outside of described ice chest;
The outlet of described the second runner is connected by pipeline with the entrance of described compressor;
Described first flow is natural-gas transfer pipeline, and, the centre exit of described first flow is connected with the entrance of the heavy hydrocarbon separator that is arranged at the ice chest outside, described heavy hydrocarbon separator is provided with a gas outlet and heavy hydrocarbon outlet, wherein said gas outlet is connected with the centre entrance of described first flow, the exit of described first flow is provided with choke valve, and this choke valve is positioned at the outside of described ice chest;
It is characterized in that described gas phase pipeline is provided with choke valve, and described gas phase pipeline is connected with liquid pipe and is connected together first before the entrance of the 3rd runner of described ice chest is connected.
According to specific embodiments of the present utility model, preferably, the natural gas mix refrigerant liquefying plant that above-mentioned employing promotes liquid phase cryogen technology comprises the first suction tank, the first compressor, the first cooler, the second suction tank, the second compressor, the second cooler, cryogenic fluid pump, knockout drum, ice chest, heavy hydrocarbon separator, wherein
Described ice chest has three runners, is respectively first flow, the second runner and the 3rd runner;
The outlet of described the first suction tank is connected by pipeline with the entrance of described the first compressor;
The outlet of described the first compressor is connected by pipeline with the entrance of described the first cooler;
The outlet of described the first cooler is connected by pipeline with the entrance of described the second suction tank;
The gas vent of described the second suction tank is connected by pipeline with the entrance of described the second compressor, the liquid outlet of described the second suction tank is connected by pipeline with the entrance of described the second cooler, and the pipeline between the entrance of the liquid outlet of described the second suction tank and described the second cooler is provided with described cryogenic fluid pump;
The outlet of described the second compressor is connected by pipeline with the entrance of described the second cooler;
The outlet of described the second cooler is connected by pipeline with the entrance of described knockout drum;
The gas vent of described knockout drum is connected by the gas phase pipeline with the entrance of the second runner of described ice chest, and the liquid outlet of described knockout drum is connected by liquid pipe with the entrance of the second runner of described ice chest;
The outlet of described the second runner is connected by pipeline with the entrance of described the 3rd flow field end, and the pipeline between the two is provided with choke valve, and this choke valve is positioned at the outside of described ice chest;
The outlet of described the 3rd runner is connected by pipeline with the entrance of described the first suction tank;
The first flow of described ice chest is natural-gas transfer pipeline, and, the centre exit of described first flow is connected with the entrance of the heavy hydrocarbon separator that is arranged at the ice chest outside, described heavy hydrocarbon separator is provided with a gas outlet and heavy hydrocarbon outlet, wherein said gas outlet is connected with the centre entrance of described first flow, the exit of described first flow is provided with choke valve, and this choke valve is positioned at the outside of described ice chest;
It is characterized in that described gas phase pipeline is provided with choke valve, described gas phase pipeline is connected with liquid pipe and is connected together first before the entrance of the second runner of described ice chest is connected.
According to specific embodiments of the present utility model, preferably, the natural gas mix refrigerant liquefying plant that above-mentioned employing promotes liquid phase cryogen technology comprises the first suction tank, the first compressor, the first cooler, the second suction tank, the second compressor, the second cooler, cryogenic fluid pump, knockout drum, ice chest, heavy hydrocarbon separator, wherein
Described ice chest has four runners, is respectively first flow, the second runner, the 3rd runner and the 4th runner;
The outlet of described the first suction tank is connected by pipeline with the entrance of described the first compressor;
The outlet of described the first compressor is connected by pipeline with the entrance of described the first cooler;
The outlet of described the first cooler is connected by pipeline with the entrance of described the second suction tank;
The gas vent of described the second suction tank is connected by pipeline with the entrance of described the second compressor, the liquid outlet of described the second suction tank is connected by pipeline with the entrance of the 3rd runner of described ice chest, and the pipeline between the entrance of the 3rd runner of the liquid outlet of described the second suction tank and described ice chest is provided with described cryogenic fluid pump;
The outlet of described the second compressor is connected by pipeline with the entrance of described the second cooler;
The outlet of described the second cooler is connected by pipeline with the entrance of described knockout drum;
The gas vent of described knockout drum is connected by the gas phase pipeline with the entrance of the second runner of described ice chest, and the liquid outlet of described knockout drum is connected by liquid pipe with the entrance of the second runner of described ice chest;
The outlet of described the second runner is connected by pipeline with the entrance of described the 4th flow field end, and the pipeline between the two is provided with choke valve, and this choke valve is positioned at the outside of described ice chest;
The outlet of described the 3rd runner is connected by pipeline with the entrance at described the 4th runner middle part, and the pipeline between the two is provided with choke valve, and this choke valve is positioned at the outside of described ice chest;
The outlet of described the 4th runner is connected by pipeline with the entrance of described the first suction tank;
The first flow of described ice chest is natural-gas transfer pipeline, and, the centre exit of described first flow is connected with the entrance of the heavy hydrocarbon separator that is arranged at the ice chest outside, described heavy hydrocarbon separator is provided with a gas outlet and heavy hydrocarbon outlet, wherein said gas outlet is connected with the centre entrance of described first flow, the exit of described first flow is provided with choke valve, and this choke valve is positioned at the outside of described ice chest;
It is characterized in that described gas phase pipeline is provided with choke valve, described gas phase pipeline is connected with liquid pipe and is connected together first before the entrance of the second runner of described ice chest is connected.
According to specific embodiments of the present utility model, promote in the natural gas mix refrigerant liquefying plant of liquid phase cryogen technology in above-mentioned employing, described ice chest is the plate-fin ice chest.
The natural gas mix refrigerant liquefying plant that the employing that the utility model provides promotes liquid phase cryogen technology is that the gas phase cryogen pipeline between knockout drum and ice chest arranges choke valve on the basis of existing natural gas mix refrigerant liquefying plant.In above-mentioned liquefying plant, the equipment such as suction tank, cooler (or claiming heat exchanger), compressor, heavy hydrocarbon separator, purification of raw materials device, product storage device can also be set as required, concrete can carry out with reference to the usual manner of this area.
According to specific embodiments of the present utility model, promote in the natural gas mix refrigerant liquefying plant of liquid phase cryogen technology in above-mentioned employing, the compressor that adopts can be for compressing centrifugal mix refrigerant compressor etc., and the cooler that adopts can be aerial cooler and/or water cooler etc.
Promote in the natural gas mix refrigerant liquefying plant of liquid phase cryogen technology in the employing that the utility model provides, ice chest can be divided into high potential temperature section and low-temperature level section, the runner that has has distribution in high potential temperature section and low-temperature level Duan Jun, the runner that has only is distributed in high potential temperature section, it is terminal that the end outlet of the runner that has is positioned at the low-temperature level section, the centre entrance of runner is between low-temperature level section and high potential temperature section, and concrete set-up mode can be adjusted as required.High potential temperature section is positioned at the top of ice chest, and in this zone, the temperature of natural gas is higher.The low-temperature level section is positioned at the bottom of ice chest, and in this zone, the temperature relatively-high temperature position section of natural gas decreases.The high temperature of high potential temperature section is for the low temperature of low-temperature level section, and in fact, two sections temperature is all below normal temperature.
The employing of adopting the utility model to provide promotes the natural gas mix refrigerant liquefying plant of liquid phase cryogen technology, by being set, choke valve just can realize lifting to liquid phase cryogen potential energy, do not need again equipment frame is high or liquor pump be set to carry out pumping, have simple in structure, easy and simple to handle, the advantages such as result of use.
Description of drawings
The following drawings only is intended to the utility model done and schematically illustrates and explain, does not limit scope of the present utility model.Wherein:
The LNG Lquified Process Flow schematic diagram that Fig. 1 provides for CN101608860A;
The LNG Lquified Process Flow schematic diagram that Fig. 2 provides for CN101893367A;
The structural representation of the natural gas mix refrigerant liquefying plant that Fig. 3 provides for embodiment 1;
The structural representation of the natural gas mix refrigerant liquefying plant that Fig. 4 provides for embodiment 2;
The structural representation of the natural gas mix refrigerant liquefying plant that Fig. 5 provides for embodiment 3.
Main drawing reference numeral explanation:
Ice chest 304,409 heavy hydrocarbon separators 305,410 first throttle valves 306,411
The second choke valve 307,412 the 3rd choke valves 308,416 gas phase pipelines 309,414
Liquid pipe 310,415 first suction tanks, 401 first compressors 402
The first cooler 403 second suction tanks 404 second compressors 405
Cryogenic fluid pump 406 second coolers 407 holders 413
The specific embodiment
Understand for technical characterictic of the present utility model, purpose and beneficial effect being had more clearly, referring now to Figure of description the technical solution of the utility model is carried out following detailed description, but but can not be interpreted as restriction to practical range of the present utility model.
Present embodiment provides a kind of natural gas mix refrigerant liquefying plant that promotes liquid phase cryogen technology that adopts, its structure as shown in Figure 3, this device comprises compressor 301, heat exchanger 302, knockout drum 303, ice chest 304, heavy hydrocarbon separator 305, wherein,
The outlet of compressor 301 is connected by pipeline with the entrance of heat exchanger 302;
The outlet of heat exchanger 302 is connected by pipeline with the entrance of knockout drum 303;
The gas vent of knockout drum 303 is connected by gas phase pipeline 309 with the entrance of the 3rd runner of ice chest 304, and the liquid outlet of knockout drum 303 is connected by liquid pipe 310 with the entrance of the 3rd runner of ice chest 304;
The outlet of the 3rd runner is connected by pipeline with the entrance of the second flow field end, and the pipeline between the two is provided with first throttle valve 306, and first throttle valve 306 is positioned at the outside of ice chest 304;
The outlet of the second runner can with other necessary equipment connections, can arrange in a conventional manner as required this, for example by being connected by pipeline with the entrance of compressor 301 after certain equipment;
First flow is natural-gas transfer pipeline, and, the centre exit of first flow is connected with the entrance of the heavy hydrocarbon separator 305 that is arranged at ice chest 304 outsides, heavy hydrocarbon separator 305 is provided with a gas outlet and heavy hydrocarbon outlet, wherein gas outlet is connected with the centre entrance of first flow, the exit of first flow is provided with the outside that the second choke valve 307, the second choke valves 307 are positioned at ice chest 304;
When the device that adopts present embodiment to provide, mix refrigerant is through compressor 301 superchargings, through becoming gas-liquid two-phase after the heat exchanger 302, carry out gas-liquid separation through knockout drum 303, then close the 3rd choke valve 308, mix refrigerant pressure in the gas phase pipeline 309 raises, so that knockout drum 303 internal pressures raise, when knockout drum 303 internal pressures are increased to the pressure that can make liquid and overcome the gravitional force of knockout drum 303 and ice chest 304 top azeotrope import departments, mix refrigerant flows into ice chest 304, carry out heat exchange with natural gas, the mix refrigerant of the 3rd runner leaves ice chest 304 and gets back to ice chest 304 and carry out heat exchange with natural gas after first throttle valve 306 throttlings cooling, and mix refrigerant is got back to compressor 301 places and proceeded refrigerant cycle afterwards;
Raw natural gas enters ice chest 304 by first flow and carries out heat exchange with mix refrigerant, middle through heavy hydrocarbon separator 305 separation heavy hydrocarbons, heavy hydrocarbon reclaims, the natural gas then centre entrance by first flow enters ice chest 304 and continues to carry out heat exchange with mix refrigerant, cryogenic natural gas enters storage tank through obtaining LNG after the second choke valve 307.
Embodiment 2
Present embodiment provides a kind of natural gas mix refrigerant liquefying plant that promotes liquid phase cryogen technology that adopts, its structure as shown in Figure 4, this device comprises the first suction tank 401, the first compressor 402, the first cooler 403, the second suction tank 404, the second compressor 405, the second cooler 407, cryogenic fluid pump 406, knockout drum 408, ice chest 409, heavy hydrocarbon separator 410, clarifier 417 and holder 413, wherein
The outlet of the first suction tank 401 is connected by pipeline with the entrance of the first compressor 402;
The outlet of the first compressor 402 is connected by pipeline with the entrance of the first cooler 403;
The outlet of the first cooler 403 is connected by pipeline with the entrance of the second suction tank 404;
The gas vent of the second suction tank 404 is connected by pipeline with the entrance of the second compressor 405, the liquid outlet of the second suction tank 404 is connected by pipeline with the entrance of the second cooler 407, and the pipeline between the entrance of the liquid outlet of the second suction tank 404 and the second cooler 407 is provided with cryogenic fluid pump 406;
The outlet of the second compressor 405 is connected by pipeline with the entrance of the second cooler 407;
The outlet of the second cooler 407 is connected by pipeline with the entrance of knockout drum 408;
The gas vent of knockout drum 408 is connected by gas phase pipeline 414 with the entrance of the second runner of ice chest 409, and the liquid outlet of knockout drum 408 is connected by liquid pipe 415 with the entrance of the second runner of ice chest 409;
The outlet of the second runner is connected by pipeline with the entrance of the 3rd flow field end, and the pipeline between the two is provided with first throttle valve 411, and first throttle valve 411 is positioned at the outside of ice chest 409;
The outlet of the 3rd runner is connected by pipeline with the entrance of the first suction tank 401;
The first flow of ice chest 409 is natural-gas transfer pipeline, clarifier 417 and the 4th choke valve (feed valve) 418 are located on the natural-gas transfer pipeline, be used for unstripped gas is purified and throttling, and, the centre exit of first flow is connected with the entrance of the heavy hydrocarbon separator 410 that is arranged at ice chest 409 outsides, heavy hydrocarbon separator 410 is provided with a gas outlet and heavy hydrocarbon outlet, wherein gas outlet is connected with the centre entrance of first flow, the exit of first flow is provided with the second choke valve (product valve) 412, the second choke valve 412 is positioned at the outside of ice chest 409, holder 413 is located at after the second choke valve 412, is used for storing the LNG product;
When the device that adopts present embodiment to provide, mix refrigerant at first enters the first compressor 402 and compresses, afterwards through 403 coolings of the first cooler, cooled mix refrigerant enters second segment suction tank 404 and carries out gas-liquid separation, the gas phase cryogen that obtains enters the second compressor 405 and further compresses, the liquid phase cryogen enters the second cooler 407 after the gas phase cryogen of high pressure and liquid phase cryogen mix afterwards again and cools off then by cryogenic fluid pump 406 adherence pressures; Cooled mix refrigerant enters knockout drum 408 and carries out gas-liquid separation, and obtains gas phase cryogen and liquid phase cryogen;
Make gas phase pipeline 414 produce certain pressure differential after and before the valve by the aperture of regulating the 3rd choke valve 416 on the gas phase pipeline 414, in the driving of this pressure differential, the liquid phase cryogen upwards flows along liquid phase pipeline 415, and enters ice chest 409 top entrances converging with the gas phase cryogen;
Enter the azeotrope of ice chest 409 through passing through the first throttle valve throttling refrigeration of a low temperature after the precooling, the cryogen that obtains low temperature returns ice chest 409 by the 3rd runner provides cold;
Raw natural gas is chilled in advance and leaves ice chest 409 after the uniform temperature and enter heavy hydrocarbon separator 410 through entering ice chest 409 after purifying, at the bottom of tank, obtain heavier hydrocarbon products, the gas phase natural gas that tank deck obtains is got back to ice chest 409 continuation cooling and liquefaction by the entrance that first flow is positioned at ice chest 409 middle parts, stores by entering holder 413 behind the second choke valve 412 reduction pressure afterwards.
Present embodiment provides a kind of natural gas mix refrigerant liquefying plant that promotes liquid phase cryogen technology that adopts, its structure as shown in Figure 5, this device comprises the first suction tank 401, the first compressor 402, the first cooler 403, the second suction tank 404, the second compressor 405, the second cooler 407, cryogenic fluid pump 406, knockout drum 408, ice chest 409, heavy hydrocarbon separator 410, clarifier 417 and holder 413, wherein
The outlet of the first suction tank 401 is connected by pipeline with the entrance of the first compressor 402;
The outlet of the first compressor 402 is connected by pipeline with the entrance of the first cooler 403;
The outlet of the first cooler 403 is connected by pipeline with the entrance of the second suction tank 404;
The gas vent of the second suction tank 404 is connected by pipeline with the entrance of the second compressor 405, the liquid outlet of the second suction tank 404 is connected by pipeline with the entrance of the 3rd runner of ice chest 409, and the pipeline between the entrance of the 3rd runner of the liquid outlet of the second suction tank 404 and ice chest 409 is provided with cryogenic fluid pump 406;
The outlet of the second compressor 405 is connected by pipeline with the entrance of the second cooler 407;
The outlet of the second cooler 407 is connected by pipeline with the entrance of knockout drum 408;
The gas vent of knockout drum 408 is connected by gas phase pipeline 414 with the entrance of the second runner of ice chest 409, and the liquid outlet of knockout drum 408 is connected by liquid pipe 415 with the entrance of the second runner of ice chest 409;
The outlet of the second runner is connected by pipeline with the entrance of the 4th flow field end, and the pipeline between the two is provided with first throttle valve 411, and first throttle valve 411 is positioned at the outside of ice chest 409;
The outlet of the 3rd runner is connected by pipeline with the entrance at the 4th runner middle part, and the pipeline between the two is provided with the outside that the 5th choke valve 419, the five choke valves 419 are positioned at ice chest 409;
The outlet of the 4th runner is connected by pipeline with the entrance of the first suction tank 401;
The first flow of ice chest 409 is natural-gas transfer pipeline, clarifier 417 and the 4th choke valve (feed valve) 418 are located on the natural-gas transfer pipeline, be used for unstripped gas is purified and throttling, and, the centre exit of first flow is connected with the entrance of the heavy hydrocarbon separator 410 that is arranged at ice chest 409 outsides, heavy hydrocarbon separator 410 is provided with a gas outlet and heavy hydrocarbon outlet, wherein gas outlet is connected with the centre entrance of first flow, the exit of first flow is provided with the second choke valve 412, the second choke valve 412 is positioned at the outside of ice chest 409, holder 413 is located at after the second choke valve 412, is used for storing the LNG product;
When the device that adopts present embodiment to provide, mix refrigerant at first enters the first compressor 402 and compresses, afterwards through 403 coolings of the first cooler, cooled mix refrigerant enters the second suction tank 404 and carries out gas-liquid separation, the liquid phase cryogen that obtains is through directly entering the 3rd runner of ice chest 409 after cryogenic fluid pump 406 pressurizations, through after the precooling by the 5th choke valve 419 throttling refrigerations, then the centre entrance by the 4th runner returns ice chest 409 provides cold; The second suction tank 404 separating obtained gas phase cryogens enter the second compressor 405 and further compress, and enter the second cooler 407 and cool off, and cooled cryogen enters knockout drum 408 and carries out gas-liquid separation, and obtains gas phase cryogen and liquid phase cryogen;
Make gas phase cryogen pipeline 414 produce certain pressure differential after and before the valve by the aperture of regulating the 3rd choke valve 416 on the gas phase pipeline 414, in the driving of this pressure differential, the liquid phase cryogen upwards flows along liquid phase pipeline 415, and enters ice chest 409 top entrances converging with the gas phase cryogen;
The azeotrope that enters ice chest 409 through after the precooling by first throttle valve 411 throttling refrigerations, the cryogen that the obtains low temperature then entrance by the 4th runner returns ice chest 409 cold is provided;
Raw natural gas is chilled in advance and leaves ice chest 409 after the uniform temperature and enter a heavy hydrocarbon separator 410 through entering ice chest 409 after purifying, at the bottom of tank, obtain heavier hydrocarbon products, the gas phase natural gas that tank deck obtains is got back to ice chest 409 continuation cooling and liquefaction by the entrance that first flow is positioned at ice chest 409 middle parts, stores by entering LNG storage tank device 413 behind the second choke valve 412 reduction pressure afterwards.
Claims (7)
1. one kind is adopted the natural gas mix refrigerant liquefying plant that promotes liquid phase cryogen technology, it comprises knockout drum and ice chest, be provided with gas phase pipeline and liquid pipe between the top entrance of described knockout drum and ice chest, it is characterized in that, described gas phase pipeline and liquid pipe were connected together before entering described ice chest, and described gas phase pipeline is provided with choke valve.
2. employing according to claim 1 promotes the natural gas mix refrigerant liquefying plant of liquid phase cryogen technology, it is characterized in that, the gas phase cryogen outlet of described knockout drum and the outlet of liquid phase cryogen all are lower than the top entrance of described ice chest.
3. employing according to claim 2 promotes the natural gas mix refrigerant liquefying plant of liquid phase cryogen technology, it is characterized in that, the difference in height between the liquid phase cryogen outlet of described knockout drum and the top entrance of described ice chest is 5-30 rice.
4. employing according to claim 1 promotes the natural gas mix refrigerant liquefying plant of liquid phase cryogen technology, and it comprises compressor, heat exchanger, knockout drum, ice chest, heavy hydrocarbon separator, wherein,
Described ice chest has three runners, is respectively first flow, the second runner and the 3rd runner;
The outlet of described compressor is connected by pipeline with the entrance of described heat exchanger;
The outlet of described heat exchanger is connected by pipeline with the entrance of described knockout drum;
The gas vent of described knockout drum is connected by the gas phase pipeline with the entrance of the 3rd runner of described ice chest, and the liquid outlet of described knockout drum is connected by liquid pipe with the entrance of the 3rd runner of described ice chest;
The outlet of described the 3rd runner is connected by pipeline with the entrance of described the second flow field end, and the pipeline between the two is provided with choke valve, and this choke valve is positioned at the outside of described ice chest;
The outlet of described the second runner is connected by pipeline with the entrance of described compressor;
Described first flow is natural-gas transfer pipeline, and, the centre exit of described first flow is connected with the entrance of the heavy hydrocarbon separator that is arranged at the ice chest outside, described heavy hydrocarbon separator is provided with a gas outlet and heavy hydrocarbon outlet, wherein said gas outlet is connected with the centre entrance of described first flow, the exit of described first flow is provided with choke valve, and this choke valve is positioned at the outside of described ice chest;
It is characterized in that described gas phase pipeline is provided with choke valve, and described gas phase pipeline is connected with liquid pipe and is connected together first before the entrance of the 3rd runner of described ice chest is connected.
5. employing according to claim 1 promotes the natural gas mix refrigerant liquefying plant of liquid phase cryogen technology, it comprises the first suction tank, the first compressor, the first cooler, the second suction tank, the second compressor, the second cooler, cryogenic fluid pump, knockout drum, ice chest, heavy hydrocarbon separator, wherein
Described ice chest has three runners, is respectively first flow, the second runner and the 3rd runner;
The outlet of described the first suction tank is connected by pipeline with the entrance of described the first compressor;
The outlet of described the first compressor is connected by pipeline with the entrance of described the first cooler;
The outlet of described the first cooler is connected by pipeline with the entrance of described the second suction tank;
The gas vent of described the second suction tank is connected by pipeline with the entrance of described the second compressor, the liquid outlet of described the second suction tank is connected by pipeline with the entrance of described the second cooler, and the pipeline between the entrance of the liquid outlet of described the second suction tank and described the second cooler is provided with described cryogenic fluid pump;
The outlet of described the second compressor is connected by pipeline with the entrance of described the second cooler;
The outlet of described the second cooler is connected by pipeline with the entrance of described knockout drum;
The gas vent of described knockout drum is connected by the gas phase pipeline with the entrance of the second runner of described ice chest, and the liquid outlet of described knockout drum is connected by liquid pipe with the entrance of the second runner of described ice chest;
The outlet of described the second runner is connected by pipeline with the entrance of described the 3rd flow field end, and the pipeline between the two is provided with choke valve, and this choke valve is positioned at the outside of described ice chest;
The outlet of described the 3rd runner is connected by pipeline with the entrance of described the first suction tank;
The first flow of described ice chest is natural-gas transfer pipeline, and, the centre exit of described first flow is connected with the entrance of the heavy hydrocarbon separator that is arranged at the ice chest outside, described heavy hydrocarbon separator is provided with a gas outlet and heavy hydrocarbon outlet, wherein said gas outlet is connected with the centre entrance of described first flow, the exit of described first flow is provided with choke valve, and this choke valve is positioned at the outside of described ice chest;
It is characterized in that described gas phase pipeline is provided with choke valve, described gas phase pipeline is connected with liquid pipe and is connected together first before the entrance of the second runner of described ice chest is connected.
6. employing according to claim 1 promotes the natural gas mix refrigerant liquefying plant of liquid phase cryogen technology, it comprises the first suction tank, the first compressor, the first cooler, the second suction tank, the second compressor, the second cooler, cryogenic fluid pump, knockout drum, ice chest, heavy hydrocarbon separator, wherein
Described ice chest has four runners, is respectively first flow, the second runner, the 3rd runner and the 4th runner;
The outlet of described the first suction tank is connected by pipeline with the entrance of described the first compressor;
The outlet of described the first compressor is connected by pipeline with the entrance of described the first cooler;
The outlet of described the first cooler is connected by pipeline with the entrance of described the second suction tank;
The gas vent of described the second suction tank is connected by pipeline with the entrance of described the second compressor, the liquid outlet of described the second suction tank is connected by pipeline with the entrance of the 3rd runner of described ice chest, and the pipeline between the entrance of the 3rd runner of the liquid outlet of described the second suction tank and described ice chest is provided with described cryogenic fluid pump;
The outlet of described the second compressor is connected by pipeline with the entrance of described the second cooler;
The outlet of described the second cooler is connected by pipeline with the entrance of described knockout drum;
The gas vent of described knockout drum is connected by the gas phase pipeline with the entrance of the second runner of described ice chest, and the liquid outlet of described knockout drum is connected by liquid pipe with the entrance of the second runner of described ice chest;
The outlet of described the second runner is connected by pipeline with the entrance of described the 4th flow field end, and the pipeline between the two is provided with choke valve, and this choke valve is positioned at the outside of described ice chest;
The outlet of described the 3rd runner is connected by pipeline with the entrance at described the 4th runner middle part, and the pipeline between the two is provided with choke valve, and this choke valve is positioned at the outside of described ice chest;
The outlet of described the 4th runner is connected by pipeline with the entrance of described the first suction tank;
The first flow of described ice chest is natural-gas transfer pipeline, and, the centre exit of described first flow is connected with the entrance of the heavy hydrocarbon separator that is arranged at the ice chest outside, described heavy hydrocarbon separator is provided with a gas outlet and heavy hydrocarbon outlet, wherein said gas outlet is connected with the centre entrance of described first flow, the exit of described first flow is provided with choke valve, and this choke valve is positioned at the outside of described ice chest;
It is characterized in that described gas phase pipeline is provided with choke valve, described gas phase pipeline is connected with liquid pipe and is connected together first before the entrance of the second runner of described ice chest is connected.
7. employing according to claim 1 promotes the natural gas mix refrigerant liquefying plant of liquid phase cryogen technology, it is characterized in that described ice chest is the plate-fin ice chest.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220467600 CN202853257U (en) | 2012-09-13 | 2012-09-13 | Natural gas mixed refrigerant liquefying device adopting promoting technology of liquid phase refrigerant |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104089463A (en) * | 2014-07-16 | 2014-10-08 | 北京安珂罗工程技术有限公司 | Mixed refrigerant gas-liquid separating type throttling and refrigerating method and system |
| CN105698487A (en) * | 2016-03-17 | 2016-06-22 | 杨晓东 | Mixed refrigerant internal circulation method, and natural gas liquefying method and device |
| CN111504001A (en) * | 2019-01-31 | 2020-08-07 | 中石化石油工程技术服务有限公司 | Skid-mounted single-cycle mixed refrigeration natural gas liquefaction device and method |
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2012
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104089463A (en) * | 2014-07-16 | 2014-10-08 | 北京安珂罗工程技术有限公司 | Mixed refrigerant gas-liquid separating type throttling and refrigerating method and system |
| CN104089463B (en) * | 2014-07-16 | 2017-11-17 | 北京安珂罗工程技术有限公司 | A kind of method and system of azeotrope gas-liquid separating throttling refrigeration |
| CN105698487A (en) * | 2016-03-17 | 2016-06-22 | 杨晓东 | Mixed refrigerant internal circulation method, and natural gas liquefying method and device |
| CN105698487B (en) * | 2016-03-17 | 2018-01-09 | 杨晓东 | Azeotrope internal circulation method, natural gas liquefaction and liquefying plant |
| CN111504001A (en) * | 2019-01-31 | 2020-08-07 | 中石化石油工程技术服务有限公司 | Skid-mounted single-cycle mixed refrigeration natural gas liquefaction device and method |
| CN111504001B (en) * | 2019-01-31 | 2022-02-11 | 中石化石油工程技术服务有限公司 | Skid-mounted single-cycle mixed refrigeration natural gas liquefaction device and method |
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