CN103982774A - Process flow and device of multi-functional liquefied natural gas satellite station - Google Patents
Process flow and device of multi-functional liquefied natural gas satellite station Download PDFInfo
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- CN103982774A CN103982774A CN201410212863.5A CN201410212863A CN103982774A CN 103982774 A CN103982774 A CN 103982774A CN 201410212863 A CN201410212863 A CN 201410212863A CN 103982774 A CN103982774 A CN 103982774A
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Abstract
The invention discloses a process flow and a device of a multi-functional liquefied natural gas satellite station. The main flow is performed from an LNG (Liquefied Natural Gas) tank wagon, an LNG storage tank, a gasifier, a pressure adjusting and odorization device to a city pipe network. A pipeline of a medium pressure pipe network is connected to a first LNG pump and a pressurizing pump in sequence from the LNG storage tank; the pressurized pipeline is connected with a first plate type heat exchanger, then enters a second plate type heat exchanger and finally is connected into the medium pressure pipe network; the second plate type heat exchanger is further connected with a cooling water circulation pump and a compressor; a pipeline connected to the cooling water circulation pump is connected to a office area and then is connected back to the second plate type heat exchanger; a peak shaving pipeline is connected to a second LNG pump through an LNG peak shaving storage tank and then is connected into the medium pressure pipe network after being connected to an LNG heater. The multi-functional LNG satellite station integrates peak shaving, LNG filling, L-CNG (Liquefied-Compressed Natural Gas) filling, refrigerating and gas supply pipe networking, and the energy utilization rate and economical benefit of the LNG can be relatively well improved.
Description
Technical field
The invention belongs to oil gas and store and Transportation Engineering technical field, be specifically related to a kind of multi-functional LNG satellite station technological process and device.
Background technique
Along with social development, LNG satellite station becomes a kind of new mode of China's energy supply gradually.LNG satellite station is that a kind of middle-size and small-size LNG receives vaporizing station, and it mainly receives the LNG Liquefied natural gas shipping by tank car transport point, and gaseous natural gas liquified natural gas being gasified to assigned temperature, pressure by gasification supervisor uses for all types of user.LNG satellite station is to one of effective means of small and medium-sized cities Gas Market air feed, also can be used as city peak regulation and emergency guarantee source of the gas simultaneously.And provide to user under the prerequisite of gas consumption not reducing satellite station, the cold energy that LNG gasification is discharged is used, builds LNG and L-CNG gas station, promotes China's novel energy-rock gas multifunction development.
But, although LNG satellite station is not long in the development course of China, but because development speed is comparatively swift and violent, the various functions of LNG Liquefied natural gas use are domestic can be realized substantially, but in each station, function is comparatively single, can not well realize energy efficiency, economic benefit and equipment are shared rate and are maximized, therefore, multi-functional LNG satellite station, collect traditional LNG satellite station, cold energy use, LNG and the aerating of L-CNG car, peak regulation is met an urgent need in the LNG of one satellite station, can be by LNG, L-CNG gas station, storage trade, peak regulation and accident emergency vaporizing station etc. combine together, realize occupation of land utilization rate with this high, it is high that equipment is shared rate, multiple functional, save the energy, the plurality of advantages such as good in economic efficiency, therefore, multi-functional LNG satellite station is the extremely promising high intergration model LNG of tool satellite station of one.So both can be under the prerequisite of LNG Industry Chain fast development at present, performance LNG satellite station advantage flexibly and fast, realizes the energy and minimizes, economic maximized target.
Summary of the invention
The object of this invention is to provide a kind of multi-functional LNG satellite station technological process and device.
Technical solution of the present invention is as follows: tradition is extracted out by a LNG pump by LNG Liquefied natural gas in gas pipe network from liquefied natural gas (LNG) tank, then through suction booster supercharging, and deliver to the first plate type heat exchanger, in heat exchanger, with liquefied ammonia heat exchange, after heat exchange, temperature is down to-69
oc left and right, second plate type heat exchanger of flowing through afterwards in air-conditioning system, rises to-5 with temperature after normal-temperature water heat exchange
oc, and by decompressor, Pressure Drop is risen to 10 by electric heater by its temperature again to 0.4Mpa
oCbehind left and right, deliver to natural gas medium-pressure pipe network; Cold energy use system comprises secondary utilization.First, liquefied ammonia is lowered the temperature and is flow to cold carrying agent case in the first plate type heat exchanger, and liquefied ammonia is by control valve control flow afterwards, and by refrigerating medium circulating pump, liquefied ammonia delivered to freezer, last, and liquefied ammonia is got back to the first plate type heat exchanger and continued heat exchange and complete circulation.Secondly, normal-temperature water, by the second plate type heat exchanger cooling, provides power by chilled water circulating pump, delivers to get back to the second plate type heat exchanger behind office area and complete circulation; The part LNG being extracted out by a LNG pump in LNG, L-CNG refueling system adds gas area suction booster supercharging and by being the aerating of LNG car after LNG aerating adjusting device regulation and control through LNG after by control valve.And be cooled to 20 by cooler after being compressed to 25Mpa by the part rock gas after secondary heat exchange by compressor
oC, and be the aerating of CNG car after regulating and controlling by L-CNG aerating adjusting device; Peak regulation system is mainly extracted out LNG in LNG peak regulation storage tank deliver to LNG heater and be heated to assigned temperature and deliver to natural gas medium-pressure pipe network by the 2nd LNG pump.
The multi-functional LNG of one as above satellite station technological process and device:
Tradition gas pipe network; Cold energy use system; LNG, L-CNG refueling system; The large function of peak regulation system four not only realizes conventional user's gas, and part cold energy is used, and improves to a great extent the practicability of LNG satellite station.The heat exchanger using in described device cold energy use system is plate type heat exchanger, and the cold carrying agent using in one-level cold energy use is liquefied ammonia.And in order to reduce the loss of cold fire, the suction booster described in device is that LNG Liquefied natural gas mobile pressure in pipeline is brought up to 0.6MPa, and LNG Liquefied natural gas outlet temperature in the first plate type heat exchanger is set as to-69
oC.
Advantage of the present invention is: comprehensively according to the technological process of building a station of LNG satellite station, and in conjunction with the technological process of building a station of peak regulation, emergent station and LNG, L-CNG gas station, various functions is combined in a station, simultaneously, because LNG discharges larger cold energy in gasification, can be using this as according to building the freezer of appropriate scale, and by the cold energy of higher temperatures position as air conditioning water temperature exchange source, both can improve greatly the practicability of multi-functional LNG satellite station.This invention comprises four large systems, i.e. tradition gas pipe network, cold energy use system, LNG, L-CNG refueling system, peak regulation system.Related Urban Area Coverage territory is within the scope of just conventional gas, both the LNG Liquefied natural gas in can isolated operation liquefied natural gas (LNG) tank, control the use amount of refueling system and freezer use cold by adjust flux, can move peak regulation pipeline in covering area use gas peak period, with this regulate Yong Qi peak period, city the gas consumption of unnecessary use, greatly improve multi-functional LNG satellite station cost performance.
Brief description of the drawings
Fig. 1 is the multi-functional LNG of the present invention satellite station technological process and device schematic diagram.
Embodiment
Below in conjunction with drawings and the embodiments, patent of the present invention is described in further detail:
Patent of the present invention is specifically related to a kind of multi-functional LNG satellite station technological process and device, in device, institute's employing equipment comprises: liquefied natural gas (LNG) tank 1, the one LNG pump 2, suction booster 3, the first plate type heat exchanger 4, the second plate type heat exchanger 5, decompressor 6, electric heater 7, chilled water circulating pump 8, office area 9, control valve 10, LNG adds gas area suction booster 11, LNG aerating adjusting device 12, compressor 13, cooler 14, L-CNG aerating adjusting device 15, cold carrying agent case 16, flow control valve 17, refrigerating medium circulating pump 18, freezer 19, LNG peak regulation storage tank 20, the 2nd LNG pump 21, LNG heater 22, included system in flow process and device: tradition gas pipe network, cold energy use system, LNG, L-CNG refueling system, peak regulation system.
Tradition is extracted out by a LNG pump by LNG Liquefied natural gas in gas pipe network from liquefied natural gas (LNG) tank, then through suction booster supercharging, and deliver to the first plate type heat exchanger, in heat exchanger, with liquefied ammonia heat exchange, after heat exchange, temperature is down to-69
oc left and right, second plate type heat exchanger of flowing through afterwards in air-conditioning system, rises to-5 with temperature after normal-temperature water heat exchange
oc, and by decompressor, Pressure Drop is risen to 10 by electric heater by its temperature again to 0.4Mpa
oCbehind left and right, deliver to natural gas medium-pressure pipe network.
Cold energy use system comprises secondary utilization.First, liquefied ammonia is lowered the temperature and is flow to cold carrying agent case in the first plate type heat exchanger, and liquefied ammonia is by control valve control flow afterwards, and by refrigerating medium circulating pump, liquefied ammonia delivered to freezer, last, and liquefied ammonia is got back to the first plate type heat exchanger and continued heat exchange and complete circulation.Secondly, normal-temperature water, by the second plate type heat exchanger cooling, provides power by chilled water circulating pump, delivers to get back to the second plate type heat exchanger behind office area and complete circulation.
The part LNG being extracted out by a LNG pump in LNG, L-CNG refueling system adds gas area suction booster supercharging and by being the aerating of LNG car after LNG aerating adjusting device regulation and control through LNG after by control valve.And be cooled to 20 by cooler after being compressed to 25Mpa by the part rock gas after secondary heat exchange by compressor
oC, and be the aerating of CNG car after regulating and controlling by L-CNG aerating adjusting device.
Peak regulation system is mainly extracted out LNG in LNG peak regulation storage tank deliver to LNG heater and be heated to assigned temperature and deliver to natural gas medium-pressure pipe network by the 2nd LNG pump.
Described flow process and device comprise four large functions, i.e. gas, cold energy use, the automobile-used aerating of LNG, L-CNG, peak regulation for resident, public clothes, industry etc.
Described suction booster is that LNG Liquefied natural gas mobile pressure in pipeline is brought up to 0.6MPa.
The heat exchanger using in described cold energy use system is plate type heat exchanger, and the cold carrying agent using in one-level cold energy use is liquefied ammonia, and in the first plate type heat exchanger, LNG Liquefied natural gas outlet temperature is-69
oC.
Device annexation feature is: middle pressure pipe webmaster line is connected to a LNG pump 2 from liquefied natural gas (LNG) tank 1 successively, on suction booster 3, pipeline after supercharging is connected and enters the second plate type heat exchanger 5 with the first plate type heat exchanger 4, after reaching cooling-down effect, lead to decompressor 6 and electric heater 7, finally pressure pipe net in access, and a LNG pump 2 is also connected with control valve 10, then being connected to LNG adds on gas area suction booster 11, lead to again LNG aerating adjusting device 12, the second plate type heat exchanger 5 is also connected with chilled water circulating pump 8 and compressor 13, being connected to pipeline on chilled water circulating pump 8 receives and on office area 9, connects back the second plate type heat exchanger 5 again, compressor 13 these by-pass lines connect cooler 14 and L-CNG aerating adjusting device 15 successively, peak regulation pipeline is connected to the 2nd LNG pump 21 by LNG peak regulation storage tank 20, be connected to pressure pipe net in the rear access of LNG heater 22.
Claims (4)
1. multi-functional LNG satellite station technological process, the equipment that flow process adopts comprises: liquefied natural gas (LNG) tank (1), the one LNG pump (2), suction booster (3), the first plate type heat exchanger (4), the second plate type heat exchanger (5), decompressor (6), electric heater (7), chilled water circulating pump (8), office area (9), control valve (10), LNG adds gas area suction booster (11), LNG aerating adjusting device (12), compressor (13), cooler (14), L-CNG aerating adjusting device (15), cold carrying agent case (16), flow control valve (17), refrigerating medium circulating pump (18), freezer (19), LNG peak regulation storage tank (20), the 2nd LNG pump (21), LNG heater (22), included system in flow process and device: tradition gas pipe network, cold energy use system, LNG, L-CNG refueling system, peak regulation system,
It is characterized in that: tradition LNG Liquefied natural gas in gas pipe network is extracted out from liquefied natural gas (LNG) tank (1) by a LNG pump (2), again through suction booster (3) supercharging, and deliver to the first plate type heat exchanger (4), in heat exchanger, with liquefied ammonia heat exchange, after heat exchange, temperature is down to-69
oc left and right, second plate type heat exchanger (5) of flowing through afterwards in air-conditioning system, rises to-5 with temperature after normal-temperature water heat exchange
oc, and by decompressor (6) by Pressure Drop to 0.4Mpa, then by electric heater (7), its temperature is risen to 10
oCbehind left and right, deliver to natural gas medium-pressure pipe network; Cold energy use system comprises secondary utilization, first, liquefied ammonia is lowered the temperature and is flow to cold carrying agent case (16) in the first plate type heat exchanger (4), liquefied ammonia is controlled flow by control valve (17) afterwards, and by refrigerating medium circulating pump (18), liquefied ammonia is delivered to freezer (19), finally, liquefied ammonia is got back to the first plate type heat exchanger (4) continuation heat exchange and is completed circulation, secondly, normal-temperature water is by the second plate type heat exchanger (5) cooling, provide power by chilled water circulating pump (8), deliver to and get back to the second plate type heat exchanger (5) behind office area (9) and complete circulation; The part LNG being extracted out by a LNG pump (2) in LNG, L-CNG refueling system adds gas area suction booster (11) supercharging and by being the aerating of LNG car after LNG aerating adjusting device (12) regulation and control through LNG after by control valve (10), by cooler (14) is cooled to 20 after being compressed to 25Mpa by the part rock gas after secondary heat exchange by compressor (13)
oC, and be the aerating of CNG car after regulating and controlling by L-CNG aerating adjusting device (15); Peak regulation system is mainly extracted out LNG in LNG peak regulation storage tank (20) deliver to LNG heater (22) and be heated to assigned temperature and deliver to natural gas medium-pressure pipe network by the 2nd LNG pump (21).
2. the multi-functional LNG of one as claimed in claim 1 satellite station technological process and device, it is characterized in that, the heat exchanger using in described cold energy use system is plate type heat exchanger, the cold carrying agent using in one-level cold energy use is liquefied ammonia, and in the first plate type heat exchanger, LNG Liquefied natural gas outlet temperature is-69
oC.
3. the multi-functional LNG of one as claimed in claim 1 satellite station technological process and device, is characterized in that, described suction booster (3) is brought up to 0.6MPa for LNG Liquefied natural gas mobile pressure in pipeline.
4. a multi-functional LNG as claimed in claim 1 satellite station device, it is characterized in that: middle pressure pipe webmaster line is connected to a LNG pump (2) from liquefied natural gas (LNG) tank (1) successively, on suction booster (3), pipeline after supercharging is connected and enters the second plate type heat exchanger (5) with the first plate type heat exchanger (4), after reaching cooling-down effect, lead to decompressor (6) and electric heater (7), finally pressure pipe net in access, and a LNG pump (2) is also connected with control valve (10), then being connected to LNG adds on gas area suction booster (11), lead to again LNG aerating adjusting device (12), the second plate type heat exchanger (5) is also connected with chilled water circulating pump (8) and compressor (13), being connected to pipeline on chilled water circulating pump (8) receives and on office area (9), connects back the second plate type heat exchanger (5) again, this by-pass line of compressor (13) connects cooler (14) and L-CNG aerating adjusting device (15) successively, peak regulation pipeline is connected to the 2nd LNG pump (21) by LNG peak regulation storage tank 20, be connected to pressure pipe net in the rear access of LNG heater (22).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410212863.5A CN103982774B (en) | 2014-05-20 | 2014-05-20 | A kind of multi-functional LNG Liquefied natural gas satellite station technological process and device |
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| CN201410212863.5A CN103982774B (en) | 2014-05-20 | 2014-05-20 | A kind of multi-functional LNG Liquefied natural gas satellite station technological process and device |
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| CN104565809A (en) * | 2015-01-16 | 2015-04-29 | 成都深冷液化设备股份有限公司 | CNG (compressed natural gas) filling and CNG liquefying filling combined device |
| CZ305557B6 (en) * | 2014-10-03 | 2015-12-09 | Vysoká Škola Báňská - Technická Univerzita Ostrava | Multifunctional gas filling unit |
| CN105953471A (en) * | 2015-04-13 | 2016-09-21 | 李华玉 | Second type thermally driven compression heat pump |
| CN107366832A (en) * | 2017-07-25 | 2017-11-21 | 广州华丰能源科技有限公司 | A kind of LNG satellite stations cold energy generation skid makeup is put |
| RU2641410C1 (en) * | 2016-12-01 | 2018-01-17 | Юрий Васильевич Белоусов | Method of production of liquefied natural gas and compressed natural gas at the gas distributing station and complex for its implementation |
| CN107869652A (en) * | 2016-09-23 | 2018-04-03 | 陕西重型汽车有限公司 | A kind of automobile-used LNG CNG mixed gas supply systems |
| CN113217806A (en) * | 2021-06-02 | 2021-08-06 | 中国长江三峡集团有限公司 | Two-stage cooling hydrogenation system based on natural cold source and control method |
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| CN113217806A (en) * | 2021-06-02 | 2021-08-06 | 中国长江三峡集团有限公司 | Two-stage cooling hydrogenation system based on natural cold source and control method |
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