CN201885512U - Natural gas liquefaction device using cyclone refrigeration elements for refrigeration - Google Patents
Natural gas liquefaction device using cyclone refrigeration elements for refrigeration Download PDFInfo
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- CN201885512U CN201885512U CN2010206006013U CN201020600601U CN201885512U CN 201885512 U CN201885512 U CN 201885512U CN 2010206006013 U CN2010206006013 U CN 2010206006013U CN 201020600601 U CN201020600601 U CN 201020600601U CN 201885512 U CN201885512 U CN 201885512U
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Abstract
A natural gas liquefaction device using cyclone refrigeration elements for refrigeration meets the demands of national conditions of Chinese natural gas industry, integrates the advantages of the process technology of existing products, and uses residual pressure energy after natural gas pretreatment or urban pipe network pressure energy. Two cylindrical precoolers are vertically connected in series; the three cyclone refrigeration elements are respectively horizontally mounted at the lower ends of the outer walls of a cylindrical upper tower, a cylindrical middle tower and a cylindrical lower tower; four heat exchangers in two strings and two gas-liquid separating tanks are arranged in each of the three towers; the sections of the heat exchangers are semicircular; and two throttling expansion valves are mounted on lateral surfaces of each of the refrigeration elements of the middle tower and the lower tower. The device with a small amount of equipment and simple process flow is applicable to natural gas liquefaction in remote areas and scattered small gas fields, urban LNG (liquefied natural gas) refilling stations and small-sized peak shaving stations, realizes the anticipatory goal of simplified structure, overcomes the shortcomings of the prior art, and particularly not only is capable of shaving peak, but also is a refilling station.
Description
Affiliated technical field
The utility model relates to the natural gas liquefaction technical field, especially small liquid device technique field.
Background technology
Liquefied natural gas (LNG), extensively utilized by people already, the liquefaction process technology is very ripe, mainly contain two types on base load type and peak regulation type, the liquefaction process technology mainly contains the technologies such as mix refrigerant circulation of throttling refrigeration circulation, stepwise kind of refrigeration cycle, expander refrigeration circulation, mix refrigerant circulation, band precooling.
National conditions demand according to the China's natural gas industry; A, for the natural gas liquefaction technical task project in those outlying districts and scattered little gas field; B, for the natural gas liquefaction technical task project that is about at the widely used new-energy automobile LNG of China filling station; C, for the present domestic project that also is not used in the small-sized peak adjusting device of city natural gas pipe network; Though at present domestic had but various types of small liquid devices few in number, but, how all fail to solve the technical problem of simplified structure, though above-mentioned liquefaction process is extensively utilization, but because complex structure is huge, scale of investment is bigger, also be unwell to all kinds of small sized applications, and also have following weak point:
1, throttling refrigeration: atmospheric pressure of every reduction can only be lowered the temperature 0.25 ℃, needs compressor that bleed pressure is raise.
2, stepwise refrigeration; Need propane, ethene, methane three cover compressor assemblies, complex structure.
3, the mix refrigerant circulation technology of mix refrigerant kind of refrigeration cycle technology and band precooling; Complex structure.
4, decompressor precise structure, the rotating speed height, also higher than power consumption, air-tightness, requirement for dynamic balance height damage easily.
5, most is indirect refrigeration, needs cold-producing medium, complex process, and leakage problem is difficult to thorough solution mutually.
6, pressure height, complexity safeguard and the machined difficulty that cost is high, and is bulky, is inconvenient to shift.
Summary of the invention
In order to adapt to the demand of China's natural gas industry development, at above-mentioned technical task project and the existing existing deficiency of technology, the utility model combines the advantage of each prior art, use atypical technology means, the cyclone effect refrigeration that adopts a plurality of cyclone cooling modules (hereinafter to be referred as element) promptly to utilize element to have, the refrigeration process technology of temperature effect cooling characteristic, the atypical refrigeration process of the refrigeration that combines with the throttle expansion valve refrigeration, multichannel in conjunction with the heat exchange of equal pressure heat-exchanging process, the heat-exchanging process technology of plural serial stage, energy conversion technique, direct condensation technology in the heat exchange of normal pressure current downflow, technologies such as subsidy compressor boost circulation, make the utility model product with a spot of equipment, simple process structure flow process, realized the target that process structure is simplified, when being applicable to above-mentioned project, remedy the existing in prior technology deficiency, solved technical problems such as the complex process structure is huge.A kind of natural gas liquefaction device with cyclone cooling module refrigeration, comprise by the interconnective forecooler one (1) of pipeline, forecooler two (2), cyclone cooling module one (3), cyclone cooling module two (4), cyclone cooling module three (5), last tower (6), middle tower (7), knockout drum one (8), knockout drum two (9), following tower (10), LNG storage tank (11), automobile-used LNG storage tank (12), natural gas compressor (13), water cooler (14), mix flare burner (15), control valve (F-1～F-5), throttle expansion valve one (F-6), throttle expansion valve two (F-7), check valve (F-8), safety valve (F-9, F-11), stop valve (F-10) and heat-insulation layer, it is characterized in that: two cylindrical forecoolers are uprightly connected, three cyclone cooling modules respectively level be installed in cylindrical on, in, following Tata outer wall lower end, be respectively two strings in three towers, four heat exchangers and two knockout drums of its cross section semicircular in shape, in, two throttle expansion valves are equipped with in the side of following tower cooling module.Concrete technical application scheme is:
1, in the outer wall bottom of upper, middle and lower tower an element is set respectively respectively, and in, the following side of the element of tower, a throttle expansion valve respectively is set, in, down in the tower knockout drum is set respectively, after source of the gas is by two forecoolers, the inlet air source of each element is isolated mutually with three control valves.
2, in two forecoolers, the heat exchanger of an equal pressure structure respectively is set, two are connected in series, and last, in down in the tower, source of the gas is set through isolating, adopting the two-way of equal pressure heat-exchanging process heat exchange, four heat exchangers and two knockout drums of two series connection, makes source of the gas by the atypical heat-exchanging process technology of path order heat exchange under normal pressure separately.
3, with a cover natural gas compressor system, the atypical circulating technology measure of the natural gas that cyclic part is not liquefied.
4, the conservation measures that utilizes pretreated residual compression energy of natural gas or city natural gas pipe network pressure can install the major impetus energy as this still is atypical energy conversion process technology simultaneously.
5, doing the refrigeration working medium measure with natural gas, also is simultaneously the direct refrigeration process technology without the cold-producing medium circulation.
The utility model product has following craft technical feature:
1, the atypical cascaded process, abnormal type that the refrigerating capacity of preposition element, order exchange are given the subsequent element inlet air source be repeatedly formula technology, atypical dark kind of refrigeration cycle technology again, also is atypical energy conversion process simultaneously.
2, the output of the liquid throttling expansion phase of a plurality of refrigerated output series connection, throttle expansion valve change refrigeration is in parallel with refrigerated output, the dark refrigeration process technology of atypical multiple-series formula of direct condensation under normal pressure.
3, equal pressure technology multistage, series connection along separate routes reaches the atypical heat-exchanging process that carries out heat exchange under normal pressure.
4, there are not the cyclone effect refrigeration of movable machinery, the atypical dark refrigeration liquefying technology of temperature effect cooling.
5, the atypical circulation technology of subsidy compressor boost.
6, utilize the conservation measures of residual compression energy or pipe network pressure energy.
7, use natural gas as working medium directly refrigeration process measure under normal pressure.
Beneficial effect
The utility model technical products is with a spot of equipment, simple process structure flow process, realized the purpose that process structure is simplified, when being applicable to above-mentioned a, b, c project, remedied the existing in prior technology deficiency, solved the complicated technical problem such as huge of process structure, the beneficial effect that brings thus is exactly:
1, atmospheric pressure of every reduction can be lowered the temperature 7～8 ℃, and the i.e. effect of refrigeration of i.e. start is arranged.
2, element does not need power to drag, and has therefore cancelled accurate complex device such as compressor, decompressor, makes designs simplification.
3, element does not have the wearing and tearing of movable machinery, and service life is just long, and problems such as dynamic balancing, air-tightness have not just existed.
4, the structure of element and heat exchanger is all very simple, and body is in a small amount light, and this brings the many benefits of Chu just for manufacturing, machined and equipment installation, maintenance, transfer etc., and structure that can simplification device can be convenient to industrialization, producing in serial form again.
5, liquid throttling expansion phase becomes refrigeration, can increase refrigerating capacity, improves liquefied fraction, prevents that liquid from entering element.
Pressure energy when 6, making full use of residual compression energy and urban pipe network gas-use low peak, and energy-conservation.
7, the pressure loss of equal pressure heat exchange process technology is very little and energy-conservation, and is energy-conservation in the heat exchange of normal pressure current downflow.
8, with natural gas as refrigeration working medium, solved mutual leakage problem, not only environmental protection but also device is further simplified.
9, element is less demanding to supply pressure fluctation, and is more favourable in safe operation and simplification, more adapts to the peak regulation requirement.
10, both can peak regulation, can be the LNG filling station again, achieve many things at one stroke, also can save the subsidy compressor assembly.
11, for peak adjusting device, start-up time is short more good more, and suitably this device of layout is favourable in urban pipe network.
12, Zhuan Zhi startup (initially) time weak point, it is promptly cold to ventilate, and refrigerating capacity (in certain limit) can be regulated.
13, simplified equipment, amount are few, will make simple to operately, and fault rate reduces, and early investment is few, and operating cost is low.Theoretical foundation: learn that through experiment test as admission pressure P1=0.7Mpa, during cold airflow mass ratio μ c=0.8, the cryogenic temperature effect Δ Tc of element is greater than 50 ℃ (being that air pressure of every reduction can be lowered the temperature 7～8 ℃).
Element has following relational expression:
ΔTc＝T1-Tc………·(1)
In the formula: Δ Tc---be the cryogenic temperature effect of element
T1---be the intake air temperature of element
Tc-be the cold airflow temperature of element
(1) formula transplanted:
Tc＝T1-ΔTc………(2)
Liquefaction cooling condition, equation of heat balance is as follows:
Q1+Q2+Q3+Q4＞Qk1+Qk2
In the formula: Q1 is the refrigerating capacity kcal/h of element 3+4+5
Q1＝Gc·Cp·ΔTc………·(3)
In the formula: Gc is cold air flow Kg/h
Cp is specific heat at constant pressure kcal/kg a ℃ of natural gas
Δ Tc is the cryogenic temperature effect of element
Q2 is the cold kcal/h that heat exchanger reclaims
Q3 is the refrigerating capacity kcal/h that the liquid throttling expansion phase of throttle expansion valve (F-6)+(F-7) becomes
Q4 returns the cold kcal/h of cold air for each element
Qk1 is the thermic load kcal/h that LNG takes away
Qk2 is the heat kcal/h that device imports into outward
Result of calculation shows: the overall refrigerating effect of device has more surplus capacity greater than total heat duties, and therefore, the start-up time of device is short, during operation, can come the thermal balance of implement device by the set-point of adjusting control valve (F-2), (F-3), (F-4) automatically.
Description of drawings
Fig. 1 is this practical novel liquefaction process flowage structure schematic diagram.
Fig. 2 is the structural representation of cyclone cooling module one (3), cyclone cooling module two (4), cyclone cooling module three (5).
Fig. 2 .1 is the phantom of Fig. 2.Fig. 2 .2 is the A-A profile of Fig. 2 .1.
Fig. 3 is the structural representation of forecooler one (1), forecooler two (2).
Fig. 4 goes up tower (6) structural representation.
Fig. 5 is middle tower (a 7) structural representation.
Fig. 6 is following tower (10) structural representation.
Fig. 7 is the structural representation of knockout drum one (8), knockout drum two (9).
Fig. 8 is natural gas liquefaction temperature-entropy (T--S) curve synoptic diagram, and left oblique line is a high-voltage line, and right oblique line is a low-voltage line.
0 source of the gas among the figure, 1 forecooler, one, 2 forecooler two, 3 cyclone cooling modules, one, 4 cyclone cooling module, two, 5 cyclone cooling modules three, tower on 6, tower in 7,8 knockout drums one, 9 knockout drums two, 10 times towers, 11LNG storage tank, 12 automobile-used LNG storage tanks, 13 natural gas compressors, 14 water coolers, 15 mix flare burners, F-1, F-2, F-3, F-4, F-5 control valve, F-6 throttle expansion valve one, F-7 throttle expansion valve two, F-8 check valve, F-9, F-11 safety valve, F-10 stop valve, heat-insulation layer lay and are wrapped in the place that all need be incubated.
Among the figure, 1～10 marking arrangement needs processing separately, and 11～15 marking arrangements and all valves are matched finished product on demand.Among Fig. 1, the filled arrows signal is carried pressure and is (flow direction of 0.7～0.8Mpa) natural air-air source and the whole process of each equipment Reference numeral to liquefaction of flowing through, hollow arrow is then illustrated back the flow direction of cold airflow and through the heat exchange overall process of each equipment Reference numeral, and hollow arrow is opposite with the flow direction of filled arrows.
The specific embodiment
Among Fig. 1 embodiment, forecooler one (1), forecooler two (2), structure is identical, the upright installation, the stainless steel cylinder blanket is respectively installed the heat exchanger of an equal pressure structure in the shell, and two are and are connected in series.Cyclone cooling module one (3), cyclone cooling module two (4), cyclone cooling module three (5), structure is identical, and the specification difference is interchangeable, is installed in the lower end of upper, middle and lower tower outer wall respectively, preceding, tail end is horizontally disposed with, front end is the tower wall entad, and the control valve that has tube connector and tail end to carry is connected, and the valve side is each Hui Lengguan, the main body side is each air inlet, the power conversion device is embedded in the groove of front end main body, and by fixing with wealthy mouthful silencer, wealthy notch portion is each refrigerated delivery outlet.The stainless steel cylindrical structural, tower upright disjunctor in upper, middle and lower is installed, tower on uppermost being called (6), be that two source of the gas passages are isolated mutually, cross section respectively is semicircular heat exchanger in the tower, respectively with middle tower in heat exchanger in series, tower outer wall lower end is a cyclone cooling module one (3).The stainless steel cylindrical structural, be installed between the upper and lower tower, be called middle tower (7), in the tower be with last tower in heat exchanger in series, its cross section be semicircle, one short one long two heat exchangers that source of the gas is isolated mutually, short lower end is a knockout drum one (8), and cyclone cooling module two (4) and throttle expansion valve one (F-6) are arranged in tower outer wall lower end.The stainless steel cylindrical structural, be installed in below the tower, be called tower (10) down, be commonly called as the liquefaction tower, cold-storage material and knockout drum two (9) are installed in the tower, pot bottom has liquid outlet, connect by pipeline, draw outside the tower through the supination of still chassis, be connected knockout drum one (8) with the air inlet of throttle expansion valve two (F-7), knockout drum two (9), structure is identical, greatly, for a short time differ 1/3, jar shape stainless steel structure is installed in middle tower respectively, bottom in the following tower, in jar liquid barrier is arranged, air inlet, the gas outlet is respectively with the gas outlet of two interchangers, the air inlet of two cooling modules is connected, and liquid outlet is connected with the air inlet of two throttle expansion valves respectively.Among Fig. 2 embodiment, respectively at Shang Ta, middle tower, on the outer wall of the bottom tower body of following tower, it is identical that each installs a shape, the specification difference, the element that can exchange, before, tail end is horizontally disposed with, front end is the tower wall entad, because cyclone cooling module one (3), cyclone cooling module two (4), the internal structure of cyclone cooling module three (5) is identical, so illustrate: in the front of deltiod main body with mark cyclone cooling module three (5), process groove and internal thread earlier, the center connects the back side with an aperture, aperture is one of power conversion device, groove and internal thread are used to inlay and the fixed energies switching device, comprise the cyclonic chamber (5-4) that becomes with ultralow temperature materials processing, go back to cold chamber (5-5), nozzle (5-6), and they are fixed in the groove with external screw thread with concentric wealthy mouthful silencer (5-7), the wealthy mouth of silencer (5-7), it is the refrigeration delivery outlet (5-2) of each element, straight-through respectively going up in the tower, in the middle tower, in the following tower, the main body side is the air inlet (5-1) of each element, interior logical time cold chamber (5-5) separately, external respectively with the outlet of control valve (F-4), the gas outlet of knockout drum (8-2), (9-2) be connected, the back side in main body, carrying angle type control valve (5-8) with tube connector (5-9) and tail end is connected, adjust this valve, can regulate the cold airflow mass ratio μ c of each element, μ c should be controlled at 0.8 and be advisable, and the outlet of valve side is the Hui Lengguan of each element (5-3), respectively the air inlet (2-3) of forecooler two (2) in parallel, (2-2) and enter the bottom of tower.
Among Fig. 3 embodiment, at identical two, the equal pressure structure, the upright installation, be connected in series in the cylindrical stainless steel casing of forecooler of single-piece heat exchanger of suitable two double-lengths in back, setting is by the rounded arrangement of cross section, go up the heat exchanger (1-3) that gelled bronchus and main tracheae constitute, (2-3), the outlet of its air inlet (1-1) and control valve (F-1) check valve (F-8) also is connected, the air inlet (2-1) of gas outlet (1-2) serial connection forecooler two (2), gas outlet (2-2) and control valve (F-2), (F-3), (F-4) air inlet is connected in parallel, returning cold airflow enters from the air inlet (24) of forecooler, go out the lower end and be connected with the air inlet (1-4) of forecooler one (1), gas outlet (1-5) is connected with the air inlet of control valve (F-5).
Among Fig. 4 embodiment, be made into cylindrical tower (6) tower body of going up with stainless steel, uprightly be installed in above the middle tower, three tower disjunctors, be separated by between tower, leave back cold air path (6-3), (6-4), two source of the gas passages have been installed separately independently in the tower, bronchus cross section semicircular in shape is arranged, two heat exchangers of gelled equal pressure structural type (6-1) and (6-2) on the bronchus, air inlet (6-1-1), (6-2-1), respectively with control valve (F-3, F-2) gas outlet is connected, gas outlet (6-1-2), (6-2-2) air inlet (7-1-1) of the heat exchanger in the tower in the series connection respectively, (7-2-1), in the bottom of tower body outer wall, cyclone cooling module one (3) is installed, its air inlet (3-1) is connected with the outlet of control valve (F-4), refrigeration delivery outlet (3-2) directly enters in the tower, Hui Lengguan (3-3) and connect the forecooler lower end return cold air inlet (2-3), in the side of element, reserves a time cold air that is connected with Hui Lengguan (5-3) and enters the mouth.
Among Fig. 5 embodiment, be made into cylindrical middle tower (7) tower body with stainless steel, uprightly be installed in the middle of Shang Ta and the following tower, three tower disjunctors, be separated by between tower, leave back cold air path (7-3), (7-4), knockout drum of installation is with one is long and the other is short in the tower, the source of the gas passage is independent separately, its cross section respectively is semicircle, gelled two heat exchangers (7-1) on the bronchus, (7-2), knockout drum one gas outlet (7-1-2) of lower end, the air inlet (8-1) that (7-2-2) is mounted on the knockout drum one of (7-1) short lower end respectively reaches the air inlet (9-1) of the knockout drum two in the tower to be connected, heating power expansion valve one (F-6) is installed on the tower outer wall, the air inlet of valve one connects the liquid outlet (8-4) of jar one, the side of valve, cyclone cooling module two (4) is installed, its air inlet (4-1) is connected with knockout drum one gas outlet (8-2), refrigeration delivery outlet (4-2) directly enters in the tower, Hui Lengguan (4-3) and connect forecooler two return cold air inlet (2-4).
Among Fig. 6 embodiment, be made into cylindrical tower (10) tower body down with stainless steel, also claim the liquefaction tower, than last, middle tower is short by 1/2, uprightly be installed in below the middle tower, three tower disjunctors, be separated by between tower, leave back cold air path (10-1), some cold-storage materials and knockout drum two (9) are installed in the tower, the liquid outlet of pot bottom (9-4), connect by pipeline, draw outside the tower, be connected with the air inlet of throttle expansion valve two (F-7) on being installed in the tower outer wall through the supination of still chassis, the outlet of valve directly enters in the tower, cyclone cooling module three (5) is installed in bottom at the tower body outer wall, and air inlet is connected with the outlet (9-2) of knockout drum two, refrigeration delivery outlet (5-2), directly enter in the tower, the inlet that returns the cold air reservation that Hui Lengguan (5-3) causes tower enters in the tower.
Among Fig. 7 embodiment, knockout drum one (8), knockout drum two (9), make of the double-seal head stainless steel, two jar structures are identical, on jar body shell, be welded with the part fin, jar one (8) is littler by 1/3 than jar two (9), pressure vessel, need through pressure test, in the tower and the bottom in the following tower in being installed in respectively is near a side of cyclone cooling module, in jar liquid barrier (8-3) is arranged, (9-3), air inlet (8-1), (9-1), respectively with the gas outlet (7-1-2) of interchanger, (7-2-2) be connected liquid outlet (8-4), (9-4), its latter is connected by pipeline, draw outside the tower in the supination of still chassis again, be connected with the inlet of throttle expansion valve one (F-6) throttle expansion valve two (F-7) on the tower outer wall respectively, valve and element are 60 ° of angles and install, valve one (F-6), the outlet of valve two (F-7) is in directly introducing in the tower, in the following tower.
Among the embodiment, return cold air path, Hui Lengguan etc. between each tower and should be able to satisfy normal pressure to return cold air unobstructed.All devices, pipeline must pressure tests, low-voltage equipment, pipeline withstand voltage, the value of reaching the standard grade after should the equilibrium of pressure power.Shutdown, orderly closedown are closed each valve, and accidental shutdown is opened low-pressure safety valve (F-11) automatically and lighted mix flare burner (15).LNG product in the storage tank can be used for peak regulation, and available automobile-used LNG storage tank or LNG tank car load, and are transported to the destination.
Below in conjunction with each accompanying drawing technological process of the present utility model is further specified.
After the natural gas process natural gas processing factory processes, it is exactly the clean gas source of clean environment firendly, the discharge pressure of its residual compression and city natural gas pipe network, all be higher than the required operating pressure of this device, based on energy-conservation principle, make full use of this two kinds of pressure energy, with it as raw material source of the gas of the present utility model and main kinetic energy.
Above-mentioned source of the gas attracts from (0) symbol, after control valve (F-1) enters forecooler one (1), forecooler two (2) precoolings, outlet temperature is about-10 ℃, treat in control valve (F-2), (F-3), (F-4) preceding, regulate each valve, making the admission pressure upper and lower limit set-point that is communicated with corresponding element with each valve is 0.8～0.7Mpa, regulates the control valve (5-8) of each element tail end, lock after making cold airflow mass ratio μ c=0.8, this moment, source of the gas divided three the tunnel to enter follow-up flow process:
1 the tunnel, source of the gas is from the outlet output of control valve (F-4), enter the air inlet (3-1) of cyclone cooling module one (3), in element, produce the cyclone effect and freeze, cold directly enters the tower bottom, by tower inner exchanger (6-1), (6-2) absorption and again exchange give source of the gas in the interchanger, the outlet temperature of source of the gas is reached about-60 ℃.
2 the tunnel, source of the gas is from the outlet output of control valve (F-3), order enters Shang Ta, Zhong Ta, after in heat exchanger (6-1), (7-1), absorbing cold, enter knockout drum one (8), the liquid part is drawn from liquid outlet (8-4), the inlet that connects the outer heating power expansion valve one (F-6) of tower is spurted into middle tower after the liquid throttling expansion phase change refrigeration by this valve, for cold is provided in the tower; The gas part is then passed liquid barrier (8-3), and (8-2) draws from the gas outlet, enter refrigeration in the outer cyclone cooling module of tower two (4), the refrigerating capacity that the refrigerating capacity of its generation and valve one (F-6) produce is in parallel, absorbed by source of the gas among the heat exchanger in the tower (7-1), (7-2) and knockout drum one (8), the part cold that knockout drum absorbed, be superimposed on source of the gas, make the intake air temperature of element lower, source of the gas in the heat exchanger (7-2) is brought the cold that is absorbed into Xia Ta in middle tower.
3 the tunnel, source of the gas is from the outlet output of control valve (F-2), outlet temperature is about-120 ℃ behind the absorption cold in heat exchanger (6-2), (7-2), enter knockout drum two (9), liquid part in jar, under the jar internal pressure promotes, (9-4) is descending from liquid outlet, revolve on the still chassis by the road, draw outside the tower after making its mistake in LNG at the bottom of the still cold, the inlet that connects the outer heating power expansion valve two (F-7) of tower, spurt into down in the tower after the liquid throttling expansion phase change refrigeration by valve, for providing more cold in the tower down; The gas part is then passed liquid barrier (9-3), and (9-2) draws from the gas outlet, enter refrigeration in the outer cyclone cooling module of tower three (5), the refrigerating capacity of its generation directly enters Xia Ta, by cold-storage material in knockout drum two (9) and LNG and the tower absorbed and progressively make in the tower saturated gas gradually condensation condense, at the bottom of sinking to still under the gravity effect, become the LNG product, can pass through stop valve (F-10) afterwards and inject LNG storage tank (11) storage, use automobile-used LNG storage tank (12) again or be transported to the destination with the LNG tank car.
The gas that a part is not condensed and liquefies in the following tower, carrying cold rises from passway between tower, through Zhong Ta, Shang Ta, flow to forecooler two (2), forecooler one (1) direction, and in flow process, whole colds that it is entrained progressively exchange to source of the gas, finish their heat exchange mission after, discharge through (F-5) with the normal temperature state, equally, the 2 tunnel, the 1 tunnel and the cold airflow that returns of each Hui Lengguan also add above-mentioned path respectively; Discharge the back: one, can carry back the city low-pressure pipe network; Two, continue liquefaction again after the subsidy compressor boost; Its flow process is: the inlet of compressor connects the outlet of control valve (F-5), after compression, be cooled to normal temperature from the outlet of compressor through water cooler (14) after, in parallel with source of the gas again through check valve (F-8), enter liquefaction flow path again.The charge flow rate of compressor needs to regulate control according to the flow decision of returning cold air automatically by control valve (F-5), and what should guarantee upper end in the forecooler one (1) all the time returns cold air pressure for just.
This device is moving under the control automatically, and producing in serial form can make device have range of application more widely.
Claims (7)
1. natural gas liquefaction device with cyclone cooling module refrigeration, comprise by the interconnective forecooler one (1) of pipeline, forecooler two (2), cyclone cooling module one (3), cyclone cooling module two (4), cyclone cooling module three (5), last tower (6), middle tower (7), knockout drum one (8), knockout drum two (9), following tower (10), LNG storage tank (11), automobile-used LNG storage tank (12), natural gas compressor (13), water cooler (14), mix flare burner (15), control valve (F-1～F-5), throttle expansion valve one (F-6), throttle expansion valve two (F-7), check valve (F-8), safety valve (F-9, F-11), stop valve (F-10) and heat-insulation layer, it is characterized in that: two cylindrical forecoolers are uprightly connected, three cyclone cooling modules respectively level be installed in cylindrical on, in, following Tata outer wall lower end, be respectively two strings in three towers, four heat exchangers and two knockout drums of its cross section semicircular in shape, in, two throttle expansion valves are equipped with in the side of following tower cooling module.
2. liquefying plant according to claim 1 is characterized in that: forecooler one (1), forecooler two (2), and structure is identical, the upright installation, the stainless steel cylinder blanket is respectively installed the heat exchanger of an equal pressure structure in the shell, and two are and are connected in series.
3. liquefying plant according to claim 1, it is characterized in that: cyclone cooling module one (3), cyclone cooling module two (4), cyclone cooling module three (5), structure is identical, the specification difference is interchangeable, be installed in the lower end of upper, middle and lower tower outer wall respectively, preceding, tail end is horizontally disposed with, front end is the tower wall entad, the control valve that has tube connector and tail end to carry is connected, the valve side is each Hui Lengguan, and the main body side is each air inlet, and the power conversion device is embedded in the groove of front end main body, by fixing with wealthy mouthful silencer, wealthy notch portion is each refrigerated delivery outlet.
4. liquefying plant according to claim 1, it is characterized in that: the stainless steel cylindrical structural, tower upright disjunctor in upper, middle and lower is installed, tower on uppermost being called (6), be that two source of the gas passages are isolated mutually, cross section respectively is semicircular heat exchanger in the tower, respectively with middle tower in heat exchanger in series, tower outer wall lower end is a cyclone cooling module one (3).
5. liquefying plant according to claim 1, it is characterized in that: the stainless steel cylindrical structural, be installed between the upper and lower tower, be called middle tower (7), in the tower be with last tower in heat exchanger in series, its cross section be semicircle, one short one long two heat exchangers that source of the gas is isolated mutually, short lower end is a knockout drum one (8), and cyclone cooling module two (4) and throttle expansion valve one (F-6) are arranged in tower outer wall lower end.
6. liquefying plant according to claim 1, it is characterized in that: the stainless steel cylindrical structural, be installed in below the tower, be called tower (10) down, be commonly called as the liquefaction tower, cold-storage material and knockout drum two (9) are installed in the tower, pot bottom has liquid outlet, connect by pipeline, draw outside the tower, be connected with the air inlet of throttle expansion valve two (F-7) through the supination of still chassis.
7. liquefying plant according to claim 1, it is characterized in that: knockout drum one (8), knockout drum two (9), structure is identical, large and smallly differ 1/3, jar shape stainless steel structure is installed in Zhong Ta, the bottom in the tower down respectively, in jar liquid barrier is arranged, air inlet, gas outlet are connected with the gas outlet of two interchangers, the air inlet of two cooling modules respectively, and liquid outlet is connected with the air inlet of two throttle expansion valves respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206006013U CN201885512U (en) | 2010-10-22 | 2010-10-22 | Natural gas liquefaction device using cyclone refrigeration elements for refrigeration |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206006013U CN201885512U (en) | 2010-10-22 | 2010-10-22 | Natural gas liquefaction device using cyclone refrigeration elements for refrigeration |
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| CN201885512U true CN201885512U (en) | 2011-06-29 |
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| CN (1) | CN201885512U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105329089A (en) * | 2014-08-06 | 2016-02-17 | 江洪泽 | Vehicle and boat cold energy increasing and storing method apparatus and practical power system |
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2010
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105329089A (en) * | 2014-08-06 | 2016-02-17 | 江洪泽 | Vehicle and boat cold energy increasing and storing method apparatus and practical power system |
| CN105329089B (en) * | 2014-08-06 | 2020-08-14 | 江洪泽 | Power system for increasing and storing cold energy of vehicle and ship |
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Granted publication date: 20110629 Termination date: 20131022 |