CN117304992A - Anti-freezing and anti-blocking LNG skid-mounted device for removing heavy hydrocarbon through low-temperature washing - Google Patents
Anti-freezing and anti-blocking LNG skid-mounted device for removing heavy hydrocarbon through low-temperature washing Download PDFInfo
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- CN117304992A CN117304992A CN202311207302.1A CN202311207302A CN117304992A CN 117304992 A CN117304992 A CN 117304992A CN 202311207302 A CN202311207302 A CN 202311207302A CN 117304992 A CN117304992 A CN 117304992A
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- freezing
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- 238000007710 freezing Methods 0.000 title claims abstract description 100
- 229930195733 hydrocarbon Natural products 0.000 title claims abstract description 81
- 150000002430 hydrocarbons Chemical class 0.000 title claims abstract description 81
- 239000004215 Carbon black (E152) Substances 0.000 title claims abstract description 68
- 238000005406 washing Methods 0.000 title claims abstract description 48
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 66
- 239000003345 natural gas Substances 0.000 claims abstract description 30
- 238000005201 scrubbing Methods 0.000 claims abstract description 15
- 238000003795 desorption Methods 0.000 claims abstract description 8
- 239000006260 foam Substances 0.000 claims description 203
- 230000000903 blocking effect Effects 0.000 claims description 49
- 239000003949 liquefied natural gas Substances 0.000 claims description 29
- 230000000712 assembly Effects 0.000 claims description 21
- 238000000429 assembly Methods 0.000 claims description 21
- 239000007791 liquid phase Substances 0.000 claims description 17
- 238000005485 electric heating Methods 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 13
- 239000007792 gaseous phase Substances 0.000 claims description 10
- 238000010992 reflux Methods 0.000 claims description 6
- 208000001034 Frostbite Diseases 0.000 claims description 2
- 239000002828 fuel tank Substances 0.000 claims description 2
- 230000008676 import Effects 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims 3
- 238000003780 insertion Methods 0.000 claims 3
- 239000007789 gas Substances 0.000 abstract description 12
- 230000033001 locomotion Effects 0.000 description 12
- 239000012071 phase Substances 0.000 description 9
- 230000008014 freezing Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000000926 separation method Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000003915 liquefied petroleum gas Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 230000001154 acute effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 108010053481 Antifreeze Proteins Proteins 0.000 description 1
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000002528 anti-freeze Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000020335 dealkylation Effects 0.000 description 1
- 238000006900 dealkylation reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000002343 natural gas well Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
- F17C5/02—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with liquefied gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/08—Separating gaseous impurities from gases or gaseous mixtures or from liquefied gases or liquefied gaseous mixtures
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/54—Specific separation steps for separating fractions, components or impurities during preparation or upgrading of a fuel
- C10L2290/545—Washing, scrubbing, stripping, scavenging for separating fractions, components or impurities during preparation or upgrading of a fuel
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/54—Specific separation steps for separating fractions, components or impurities during preparation or upgrading of a fuel
- C10L2290/547—Filtration for separating fractions, components or impurities during preparation or upgrading of a fuel
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
The invention relates to the technical field of LNG skid-mounted, and discloses an anti-freezing and anti-blocking LNG skid-mounted device for removing heavy hydrocarbon through low-temperature washing, which is mounted on a skid-mounted frame and comprises a cold box, a low-temperature separator and a low-temperature washing tower, wherein a purified natural gas inlet is formed in the lower part of the low-temperature washing tower, a low-temperature heavy hydrocarbon inlet is formed in the upper part of the low-temperature washing tower, the low-Wen Chongting inlet is connected with the bottom of the low-temperature separator through a heavy hydrocarbon pipeline, a gas phase outlet is formed in the top of the low-temperature washing tower and is connected with an A channel inlet of the cold box, an A channel outlet of the cold box is connected with the middle part of the low-temperature separator, a gas phase natural gas outlet is formed in the top of the low-temperature separator and is connected with a B channel inlet of the cold box; thereby get into the cold box before, firstly get rid of heavy hydrocarbon through low temperature scrubber, reduce heavy hydrocarbon content to reduced the cold box and frozen stifled risk, solved the easy problem that freezes stifled appears of low temperature scrubbing desorption heavy hydrocarbon.
Description
Technical Field
The invention relates to the technical field of LNG skid-mounted devices, in particular to an anti-freezing and anti-blocking LNG skid-mounted device for removing heavy hydrocarbon through low-temperature washing.
Background
The small skid-mounted Liquefied Natural Gas (LNG) device is mainly applied to remote natural gas wells, shale gas exploration wells and coal bed methane exploitation projects, and has the advantages of high integration, automation, simplicity in installation, convenience in disassembly and transportation and the like. At present, china discovers that natural gas components are complex in certain natural gas remote wells, wherein methane content is lower, C2, C3 and C5+ content are very high, the requirement on heavy hydrocarbon removal at an LNG skid-mounted production device is very high, the heavy hydrocarbon can cause the cold box to be frozen and blocked very easily, the device is stopped and the safety risk is caused, secondly, the heavy hydrocarbon natural gas can be used in the low-temperature washing removal heavy hydrocarbon by using a low-temperature separator, heavy hydrocarbon in the natural gas is separated by using a defoaming screen in the low-temperature separator, the pore diameter of the defoaming screen is very small, meanwhile, the natural gas is washed at a low temperature, a water container in the natural gas is solidified and frozen on the defoaming screen, the situation that the defoaming screen is frozen easily occurs is caused, and therefore the separation effect and the separation efficiency are influenced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides an anti-freezing and anti-blocking LNG skid-mounted device for removing heavy hydrocarbon through low-temperature washing, and solves the problem that the heavy hydrocarbon is easy to freeze and block through low-temperature washing and removing.
The aim of the invention is realized by the following technical scheme:
the utility model provides a low temperature washing desorption heavy hydrocarbon prevent frostbite and block up LNG sled dress device, installs on sled dress frame, including cold box, low temperature separator and low temperature scrubbing tower, the lower part of low temperature scrubbing tower is provided with the clean natural gas import, the upper portion of low temperature scrubbing tower is provided with low temperature heavy hydrocarbon inlet port, low Wen Chongting inlet port passes through the heavy hydrocarbon pipeline and connects low temperature separator's bottom, the top of low temperature scrubbing tower is equipped with the gaseous phase export, the gaseous phase export is connected the A passageway entry of cold box, the A passageway exit linkage of cold box the middle part of low temperature separator, low temperature separator's top is equipped with gaseous phase natural gas export, gaseous phase natural gas exit linkage the B passageway entry of cold box;
a plurality of anti-freezing and blocking-up foam removing components are arranged in the low-temperature separator, the anti-freezing and blocking-up foam removing components are sequentially arranged along the height direction of the low-temperature separator in a sliding mode, each anti-freezing and blocking-up foam removing component comprises an upper hollow foam removing disc and a lower hollow foam removing disc, the top surface of the upper hollow foam removing disc is connected with a plurality of first transverse foam removing wires, the bottom surface of the upper hollow foam removing disc is connected with a plurality of second transverse foam removing wires, the plurality of first transverse foam removing wires and the plurality of second transverse foam removing wires are uniformly distributed along the radial direction of the upper hollow foam removing disc, the first transverse foam removing wires and the second transverse foam removing wires are arranged along the circumferential direction of the upper hollow foam removing disc in an acute angle staggered mode, the top surface of the lower hollow foam removing disc is connected with a plurality of first longitudinal foam removing wires, the plurality of first longitudinal foam removing wires and the plurality of second longitudinal foam removing wires are connected with one another, the first longitudinal foam removing wires and the second longitudinal foam removing wires are in contact with one another, the first longitudinal foam removing wires and the second longitudinal foam removing wires are formed along the same longitudinal grid, the anti-freezing and blocking-up foam removing wires are formed along the radial direction of the second longitudinal direction of the upper hollow foam removing disc, the first longitudinal foam removing wire is staggered with the second transverse foam removing wire, and the first foam removing wire is formed into an anti-freezing and is provided with a plurality of first foam removing wire;
when the low-temperature separator works, a plurality of anti-freezing, blocking and foam removing components are sequentially arranged in a contact mode and are used for enabling a plurality of foam removing grids to form dense foam removing grids;
when the cryogenic separator is frozen and blocked, a plurality of anti-freezing and blocking foam removing components are sequentially arranged at intervals, and the upper hollow foam removing disc is separated from the lower hollow foam removing disc.
In some embodiments, the low-temperature separator is rotationally provided with a screw, the screw is vertically arranged, the anti-freezing and anti-blocking foam removing assembly further comprises an upper hollow ring and a lower hollow ring, the upper hollow ring and the upper hollow foam removing disc are concentrically arranged, the outer wall of the upper hollow ring is connected with the inner wall of the upper hollow foam removing disc through an upper connecting rod, the lower hollow ring and the lower hollow foam removing disc are concentrically arranged, the outer wall of the lower hollow ring is connected with the inner wall of the lower hollow foam removing disc through a lower connecting rod, the upper hollow ring is sheathed on the screw in a threaded manner, the lower hollow ring is sheathed on the screw in a sliding manner, the top of the low-temperature separator is provided with a motor, an output shaft of the motor is connected with the screw through a coupling in a transmission manner, and the low-temperature separator is internally provided with a hollow fixing disc which is positioned below the anti-freezing and anti-blocking foam removing assembly.
In some embodiments, the upper hollow ring comprises an outer ring and an inner ring, the inner ring is in threaded fit with the screw rod, a plurality of sealing rings are fixedly sleeved on the outer wall of the inner ring, the sealing rings are uniformly distributed along the axial direction of the inner ring, an elastic sleeve is wrapped on the sealing rings, a plurality of annular grooves are formed in the inner ring of the outer ring, the annular grooves correspond to the sealing rings one to one, and the elastic sleeve is in interference fit with the annular grooves through self deformation.
In some embodiments, a limiting block is fixed on the side wall of the upper hollow foam removal disc, a vertical sliding groove is formed in the position, corresponding to the limiting block, of the inner wall of the low-temperature separator, the limiting block is slidably matched in the vertical sliding groove, the limiting blocks in the anti-freezing, anti-blocking and foam removal assemblies are uniformly distributed around the circumference direction of the low-temperature separator, a blocking block is fixed in the vertical sliding groove corresponding to each anti-freezing, anti-blocking and foam removal assembly, and after the anti-freezing, anti-blocking and foam removal assemblies are sequentially arranged at intervals, the limiting block in each anti-freezing, anti-blocking and foam removal assembly is abutted to the bottom surface of the corresponding blocking block.
In some embodiments, the bottom of the upper hollow defoaming disc is fixed with an insert block, the side wall of the insert block is slidably provided with a locking block, the locking block moves along the radial direction of the upper hollow defoaming disc, a slot is formed in the top of the lower hollow defoaming disc, a locking groove is formed in the side wall of the slot, and when the upper hollow defoaming disc contacts and connects with the lower hollow defoaming disc, the insert block is adapted in the slot, and the locking block is adapted in the locking groove.
In some embodiments, the side wall of the insert block is provided with a rectangular groove, one end of the lock block is slidably adapted in the rectangular groove, a first spring is arranged in the rectangular groove, two ends of the first spring are respectively connected with the lock block and the insert block, the bottom of the lock block, which is far away from one end of the insert block, is provided with a wedge surface, when the first spring is in a normal state, the lock block is adapted in the lock groove, and the wedge surface extends into the rectangular groove.
In some embodiments, an upper spring hole is formed in the bottom of the upper hollow foam removing disc, a lower spring hole is formed in the top of the lower hollow foam removing disc, a second spring is arranged between the upper hollow foam removing disc and the lower hollow foam removing disc, one end of the second spring penetrates into the upper spring hole to be connected with the upper hollow foam removing disc, the other end of the second spring penetrates into the lower spring hole to be connected with the lower hollow foam removing disc, and when the locking block is adapted into the locking groove, the second spring is in a compressed state.
In some embodiments, a driving cavity is arranged in the lower hollow foam-removing disc, the driving cavity is communicated with the slot and the locking groove, a top block is slidably arranged in the driving cavity, the top block is located below the locking block and moves along the axial direction of the lower hollow foam-removing disc, and the top block is used for ejecting the locking block from the locking groove.
In some embodiments, the first rack and the second rack are slidably arranged in the driving cavity, the bottom of the first rack and the bottom of the second rack are connected with the lower hollow foam removing disc through a third spring, the top block is fixed at the top of the first rack, a gear is arranged between the first rack and the second rack, the gear is meshed with the first rack and the second rack at the same time, a traction rope is connected to the bottom of the second rack, and penetrates out of the low-temperature separator after penetrating to the lower part of the hollow fixing disc in a sliding manner, and an air cylinder is vertically arranged on the outer wall of the low-temperature separator and connected with the telescopic end of the air cylinder.
In some embodiments, a liquid-phase circulating pump is arranged on the heavy hydrocarbon pipeline, the bottom of the low-temperature washing tower is connected with a demethanizer through a liquid-phase pipeline, the top and the bottom of the demethanizer are respectively connected with a fuel storage tank and a first electric heating reboiler, the first electric heating reboiler is connected with a debutanizer, the bottom and the top of the debutanizer are respectively connected with a second electric heating reboiler and a tower top air cooler, the tower top air cooler is connected with a reflux tank, and the second electric heating reboiler is connected with a tower bottom air cooler.
The beneficial effects of the invention are as follows:
1. the natural gas after purifying gets into from the low temperature scrubbing tower lower part, low temperature heavy hydrocarbon gets into from low temperature scrubbing tower upper portion and the natural gas hedging after purifying is accomplished abundant washing, a large amount of heavy hydrocarbon in the desorption natural gas, the gaseous phase of low temperature scrubbing tower washing enters into the cold box and carries out the secondary and takes off hydrocarbon, then carry out the separation of third heavy hydrocarbon in the reentrant low temperature separator, the gaseous phase of separation gets into cold box cryogenic throttle and produces LNG again, liquid phase heavy hydrocarbon enters into the low temperature scrubbing tower and circulates again and carry out desorption heavy hydrocarbon, thereby before getting into the cold box, firstly remove heavy hydrocarbon through the low temperature scrubbing tower, reduce heavy hydrocarbon content, thereby the risk that the cold box frozen stifled has been reduced, secondly, the liquid phase circulation of desorption heavy hydrocarbon flows between low temperature scrubbing tower, cold box and low temperature separator, the gradual desorption heavy hydrocarbon, make the heavy hydrocarbon removal effect of natural gas better.
2. Separate the dense defoaming net and be a plurality of defoaming grids, and a plurality of defoaming grids are crisscross in proper order along the circumferencial direction to set up and form the dense defoaming net, when guaranteeing the defoaming effect, the aperture increase of single defoaming net makes the dense defoaming net be difficult to freeze stifled, even appear freezing stifled, because can separate each other between first vertical defoaming silk and the horizontal defoaming silk of second, first horizontal defoaming silk and the vertical defoaming silk of second, make the solidification piece breakage that condenses on the defoaming net and fall in the bottom of low temperature separator in the in-process of separation, thereby can accomplish the mediation of dense defoaming net fast, solve the easy problem of freezing stifled of defoaming silk in the low temperature desorption heavy hydrocarbon.
Drawings
FIG. 1 is a schematic structural diagram of an anti-freezing and anti-blocking LNG skid-mounted device for removing heavy hydrocarbon through low-temperature washing;
FIG. 2 is a schematic diagram of the internal structure of a cryogenic separator in the anti-freezing and anti-blocking LNG skid-mounted device for removing heavy hydrocarbons through cryogenic washing;
FIG. 3 is a schematic diagram of a dense defoaming grid in an anti-freezing and anti-blocking LNG skid-mounted device for removing heavy hydrocarbons through low-temperature washing;
fig. 4 is a schematic structural diagram of an anti-freezing, anti-blocking and defoaming component in an anti-freezing, anti-blocking LNG skid-mounted device for removing heavy hydrocarbons by low-temperature washing;
FIG. 5 is a schematic structural view of an upper hollow demister disk in an anti-freezing and anti-blocking LNG skid-mounted device for removing heavy hydrocarbons through low-temperature washing;
FIG. 6 is a schematic structural view of a lower hollow demister disk in an anti-freezing and anti-blocking LNG skid-mounted device for removing heavy hydrocarbons through low-temperature washing;
FIG. 7 is an enlarged view of FIG. 2 at A;
FIG. 8 is an enlarged view at B in FIG. 2;
FIG. 9 is an enlarged view at C in FIG. 2;
FIG. 10 is a schematic structural view of an upper hollow ring in an anti-freezing and anti-blocking LNG skid-mounted device for removing heavy hydrocarbons through low-temperature washing;
FIG. 11 is a schematic view of a partial structure of a cryogenic separator in an anti-freeze and anti-blocking LNG skid device for removing heavy hydrocarbons by cryogenic washing according to the invention;
in the figure, 1-cold box, 2-cryogenic separator, 3-cryogenic scrubber, 4-purified natural gas inlet, 5-low Wen Chongting inlet, 6-gas phase outlet, 7-gas phase natural gas outlet, 8-upper hollow demister disk, 9-lower hollow demister disk, 10-first transverse demister wire, 11-second transverse demister wire, 12-first longitudinal demister wire, 13-second longitudinal demister wire, 14-insert block, 15-lock block, 16-slot, 17-lock slot, 18-rectangular slot, 19-first spring, 20-wedge face, 21-upper spring hole, 22-lower spring hole, 23-second spring, 24-lead screw, 25-upper hollow ring, 26-lower hollow ring, the device comprises the following components of a 27-upper connecting rod, a 28-lower connecting rod, a 29-motor, a 30-outer ring, a 31-inner ring, a 32-sealing ring, a 33-elastic sleeve, a 34-annular groove, a 35-limiting block, a 36-vertical sliding groove, a 37-blocking block, a 38-hollow fixed disc, a 39-driving cavity, a 40-top block, a 41-first rack, a 42-second rack, a 43-third spring, a 44-gear, a 45-traction rope, a 46-cylinder, a 47-liquid phase circulation pump, a 48-liquid phase pipeline, a 49-demethanizer, a 50-fuel device storage tank, a 51-first electric heating reboiler, a 52-debutanizer, a 53-second electric heating reboiler, a 54-tower top air cooler, a 55-reflux tank and a 56-tower bottom air cooler.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to the accompanying drawings, but the scope of the present invention is not limited to the following description.
Embodiment I, as shown in figures 1 to 11, an anti-freezing and plugging LNG skid-mounted device for removing heavy hydrocarbon through low-temperature washing is installed on a skid-mounted frame and comprises a cold box 1, a low-temperature separator 2 and a low-temperature washing tower 3, wherein the lower part of the low-temperature washing tower 3 is provided with a purified natural gas inlet 4, the upper part of the low-temperature washing tower 3 is provided with a low-temperature heavy hydrocarbon inlet 5, a low-temperature Wen Chongting inlet 5 is connected with the bottom of the low-temperature separator 2 through a heavy hydrocarbon pipeline, the low-temperature heavy hydrocarbon inlet 5 is also connected with an external heavy hydrocarbon inlet pipe, the top of the low-temperature washing tower 3 is provided with a gas phase outlet 6, the gas phase outlet 6 is connected with an A channel inlet of the cold box 1, the A channel outlet of the cold box 1 is connected with the middle part of the low-temperature separator 2, the top of the low-temperature separator 2 is provided with a gas phase natural gas outlet 7, the gas phase natural gas outlet 7 is connected with a B channel inlet of the cold box 1, external heavy hydrocarbon enters the low-temperature washing tower 3 through the low-temperature Wen Chongting inlet 5, the purified natural gas enters a low-temperature washing tower 3 from the lower part and is fully washed by the opposite flushing of heavy hydrocarbon, a large amount of heavy hydrocarbon in the natural gas is removed, the gas phase washed by the low-temperature washing tower 3 enters an A channel of a cold box 1, secondary dealkylation is carried out, then the gas phase enters a low-temperature separator 2 through the A channel of the cold box 1 for carrying out tertiary heavy hydrocarbon separation, the separated gas phase enters the cold box 1 through a B channel of the cold box 1 for carrying out cryogenic throttling to generate LNG, the liquid phase heavy hydrocarbon in the low-temperature separator 2 enters the low-temperature washing tower 3 for recycling to remove the heavy hydrocarbon, thereby removing the heavy hydrocarbon through the low-temperature washing tower 3 before entering the cold box 1, reducing the heavy hydrocarbon content, reducing the freezing and blocking risk of the cold box 1, secondly, the liquid phase recycling for removing the heavy hydrocarbon circularly flows among the low-temperature washing tower 3, the cold box 1 and the low-temperature separator 2, gradually removing heavy hydrocarbon, so that the heavy hydrocarbon removal effect of the natural gas is better; the heavy hydrocarbon pipeline is provided with a liquid-phase circulating pump 47, the liquid phase in the low-temperature separator 2 is pumped into the low-temperature washing tower 3 through the liquid-phase circulating pump 47, the low-temperature heavy hydrocarbon and the purified natural gas are fully washed, the bottom of the low-temperature washing tower 3 is connected with a demethanizer 49 through the liquid-phase pipeline 48, the top and the bottom of the demethanizer 49 are respectively connected with a fuel tank 50 and a first electric heating reboiler 51, the first electric heating reboiler 51 is connected with a debutanizer 52, the bottom and the top of the debutanizer 52 are respectively connected with a second electric heating reboiler 53 and an air cooler 54, the air cooler 54 at the top of the tower is connected with a reflux tank 55, the second electric heating reboiler 53 is connected with a tower bottom air cooler 56, the liquid phase in the low-temperature washing tower 3 enters the demethanizer 49, the liquid phase is heated through the first electric heating reboiler 53, and the temperature is controlled at 80 ℃, after the mixed hydrocarbon is heated, the fractionated methane and ethane are recovered from the top of the tower into a burner storage tank 50, the mixed hydrocarbon is combusted in a generator system, the liquid phase C3 and above is fed into a debutanizer 52, the mixed hydrocarbon is heated by a second electric heating reboiler 53, the temperature is controlled at 120 ℃, the pressure is controlled to be 0.7Mpa, after the mixed hydrocarbon is heated, C3 and C4 are fed into a tower top air cooler 54 from the upper part of the debutanizer 52 and cooled, and then fed into a debutanizer reflux tank 55, the liquefied petroleum gas in the debutanizer reflux tank 55 is fed into a tank wagon for external transmission through a liquefied petroleum gas crane pipe, and the heavy hydrocarbon with C5 and above is fed into the tank wagon for external transmission through a light oil pipe after being cooled from the lower part of the debutanizer 52, so that the heavy hydrocarbon is fractionated into the liquefied petroleum gas and the light oil, and the blockage of a cold box 1 is eliminated, and the production of the device and the safety risks are caused.
On the basis of the second embodiment, as shown in fig. 2 to 6, a plurality of anti-freezing and blocking foam removing components are arranged in the low-temperature separator 2, the plurality of anti-freezing and blocking foam removing components are sequentially arranged in a sliding manner along the height direction of the low-temperature separator 2, each anti-freezing and blocking foam removing component comprises an upper hollow foam removing disc 8 and a lower hollow foam removing disc 9, the top surface of the upper hollow foam removing disc 8 is connected with a plurality of first transverse foam removing wires 10, the bottom surface of the upper hollow foam removing disc 8 is connected with a plurality of second transverse foam removing wires 11, the plurality of first transverse foam removing wires 10 and the plurality of second transverse foam removing wires 11 are uniformly distributed along the radial direction of the upper hollow foam removing disc 8, the first transverse foam removing wires 10 and the second transverse foam removing wires 11 are arranged in an acute angle staggered manner along the circumferential direction of the upper hollow foam removing disc 8, the top surface of the lower hollow foam removing disc 9 is connected with a plurality of first longitudinal foam removing wires 12, the bottom surface of the lower hollow foam removing disc 9 is connected with a plurality of second longitudinal foam removing wires 13, the first longitudinal foam-removing wires 12 and the second longitudinal foam-removing wires 13 are uniformly distributed along the radial direction of the lower hollow foam-removing disk 9, the first longitudinal foam-removing wires 12 and the second longitudinal foam-removing wires 13 are arranged in an staggered manner along the circumferential direction of the lower hollow foam-removing disk 9, the second transverse foam-removing wires 11 in the same anti-freezing and blocking foam-removing assembly are contacted with the first longitudinal foam-removing wires 12 to form foam-removing grids, the first transverse foam-removing wires 10 in two adjacent anti-freezing and blocking foam-removing assemblies are contacted with the second longitudinal foam-removing wires 13 to form foam-removing grids, namely, an anti-freezing and blocking foam-removing assembly is formed with foam-removing grids, two anti-freezing and blocking foam-removing assemblies are formed with a plurality of foam-removing grids along the height direction of the low-temperature separator 2, the foam-removing grids are uniformly distributed along the circumferential direction of the low-temperature separator 2, the plurality of defoaming grids are sequentially staggered from top to bottom along the axial direction of the low-temperature separator 2, and the staggered direction is along the circumferential direction of the low-temperature separator 2, so that a plurality of independent defoaming grids jointly form a dense defoaming net, natural gas passes through the dense defoaming net from top to bottom, and mist in the natural gas is removed through the dense defoaming net, so that heavy mist hydrocarbon is separated from the natural gas, and the heavy hydrocarbon is separated; when the low-temperature separator 2 works, a plurality of anti-freezing and anti-blocking foam removing components are sequentially arranged in a contact mode and are used for enabling a plurality of foam removing grids to form a dense foam removing net, and the dense foam removing net is formed by interlacing a plurality of foam removing grids, so that the aperture of a single foam removing grid is larger, and the problem of freezing and blocking is not easy to occur; when the low-temperature separator 2 is frozen and blocked, a plurality of freezing prevention and blocking removal assemblies are sequentially arranged at intervals, the upper hollow foam removal disc 8 is separated from the lower hollow foam removal disc 9, a plurality of foam removal grids can be separated from one another, the second transverse foam removal wire 11 is separated from the first longitudinal foam removal wire 12, the first transverse foam removal wire 10 is separated from the second longitudinal foam removal wire 13, so that the foam removal grids are further split, the aperture is further enlarged, the condensation block-shaped blocking objects are broken and crushed in a breaking way in the separating process, the broken blocking objects sequentially pass through the foam removal grids and fall on the bottom of the low-temperature separator 2, so that the dense foam removal grids are dredged, the freezing blocking of the foam removal wire mesh in the low-temperature separator 2 can be quickly dredged, and the freezing blocking can be quickly dredged in time when the low-temperature separator 2 washes out heavy hydrocarbon in the process.
On the basis of the third embodiment, as shown in fig. 1, 7, 8 and 9, a screw 24 is rotationally arranged in the low-temperature separator 2, the screw 24 is vertically arranged, the anti-freezing and anti-blocking foam removing assembly further comprises an upper hollow ring 25 and a lower hollow ring 26, the upper hollow ring 25 is concentrically arranged with the upper hollow foam removing disk 8, the outer wall of the upper hollow ring 25 is connected with the inner wall of the upper hollow foam removing disk 8 through an upper connecting rod 27, the lower hollow ring 26 is concentrically arranged with the lower hollow foam removing disk 9, the outer wall of the lower hollow ring 26 is connected with the inner wall of the lower hollow foam removing disk 9 through a lower connecting rod 28, the upper hollow ring 25 is sleeved on the screw 24 in a threaded manner, the lower hollow ring 26 is slidably sleeved on the screw 24, the top of the low-temperature separator 2 is provided with a motor 29, the output shaft of the motor 29 is in transmission connection with the screw 24 through a coupling, a hollow fixing disk 38 is fixed in the low-temperature separator 2, the hollow fixed disk 38 is positioned below the anti-freezing and anti-blocking foam removing assembly, the upper hollow ring 25 comprises an outer ring 30 and an inner ring 31, the inner ring 31 is sleeved on the screw 24 in a threaded manner, a plurality of sealing rings 32 are fixedly sleeved on the outer wall of the inner ring 31, the plurality of sealing rings 32 are uniformly distributed along the axial direction of the inner ring 31, an elastic sleeve 33 is wrapped on the sealing rings 32, a plurality of annular grooves 34 are formed in the inner ring of the outer ring 30, the plurality of annular grooves 34 are in one-to-one correspondence with the plurality of sealing rings 32, the elastic sleeve 33 is in the annular grooves 34 in an interference fit manner through self deformation, the friction force between the outer ring 30 and the inner ring 31 is improved through the interference fit of the plurality of elastic sleeves 33, so that a larger torsion force is needed for overcoming the friction force between the outer ring 30 and the inner ring 31, a limit block 35 is fixed on the side wall of the upper hollow foam removing disk 8, a vertical chute 36 is formed in the position of the inner wall of the low-temperature separator 2 corresponding to the limit block 35, the limit block 35 is in a sliding fit in the vertical chute 36, the limiting blocks 35 in the plurality of anti-freezing and anti-blocking foam removing assemblies are uniformly distributed around the circumference direction of the low-temperature separator 2, the corresponding vertical sliding grooves 36 of each anti-freezing and anti-blocking foam removing assembly are internally and fixedly provided with the resisting blocks 37, when the plurality of anti-freezing and anti-blocking foam removing assemblies are sequentially arranged at intervals, the limiting blocks 35 in each anti-freezing and anti-blocking foam removing assembly are abutted against the bottom surface of the corresponding resisting block 37, that is, each upper hollow foam removing disc 8 is correspondingly provided with one resisting block 37, the resisting blocks 37 are positioned on the moving path of the limiting blocks 35 in the corresponding upper hollow foam removing disc 8, the heights of the resisting blocks 37 corresponding to the plurality of upper hollow foam removing discs 8 from bottom to top are gradually increased, and the resisting blocks 37 are staggered, so that each upper hollow foam removing disc 8 stops moving only after contacting the corresponding resisting blocks 37, the other non-corresponding resisting blocks 37 can not limit the movement of the upper hollow foam-removing disc 8, so that a plurality of anti-freezing and blocking foam-removing assemblies can be sequentially arranged at intervals along the axial direction of the low-temperature separator 2, specifically, when freezing and blocking are needed to dredge a dense foam-removing grid, the motor 29 drives the screw 24 to rotate, the rotation freedom degree of the upper hollow foam-removing disc 8 is limited through the adaption of the limiting block 35 and the vertical sliding groove 36, the outer ring 30 and the inner ring 31 are equivalent to a whole under the action of the elastic sleeve 33, the inner ring 31 makes linear movement along the axial direction of the screw 24, the upper hollow ring 25 drives the upper hollow foam-removing disc 8 to make linear movement along the axial direction of the screw 24, the upper hollow foam-removing disc 8 drives the lower hollow foam-removing disc 9 to make the plurality of anti-freezing and blocking foam-removing assemblies make linear movement along the axial direction of the screw 24 at the same time, and when the limiting block 35 of the upper hollow foam-removing disc 8 moves to be abutted against the resisting blocks 37, the linear motion freedom degree of the upper hollow foam-removing disc 8 is limited by the stop block 37, at this time, the torsion force born by the inner ring 31 in the upper hollow foam-removing disc 8 is increased, the friction force between the inner ring 31 and the outer ring 30 is overcome under the action of the large torsion force, so that the outer ring 30 and the inner ring 31 relatively rotate, on one hand, the height position of the upper hollow foam-removing disc 8 can be kept stable, interference with the rotating screw 24 can not be generated, the other hollow foam-removing discs 8 continue to do linear motion until the corresponding stop block 37 is opposite, so that a plurality of anti-freezing and blocking foam-removing assemblies on the same screw 24 have different motion heights under the condition of no interference, and when attention is needed, the motion distance of the upper hollow foam-removing disc 8 sequentially arranged from top to bottom along the height direction of the low-temperature separator 2 is gradually shortened, that is to say, the stop block 35 of the upper hollow foam-removing disc 8 at the lowest contacts the stop block 37 at first, the stop block 35 of the upper hollow foam-removing disc 8 at last contacts the stop block 37, so that a plurality of anti-freezing and blocking foam-removing assemblies can flow out of the adjacent hollow foam-removing discs 9 along the axial direction of the low-temperature separator 2; when the dredging of the anti-freezing, blocking and foam removing assembly is finished, the motor 29 drives the screw rod 24 to rotate reversely, so that a plurality of anti-freezing, blocking and foam removing assemblies move downwards, the lower hollow foam removing disc 9 in the lowermost anti-freezing, blocking and foam removing assembly is firstly abutted against the hollow fixed disc 38, and the linear motion of the anti-freezing, blocking and foam removing assembly is limited by the hollow fixed disc 38, so that relative rotational freedom degree is generated between the inner ring 31 and the outer ring 30 in the anti-freezing, blocking and foam removing assembly, the inner ring 31 rotates along with the screw rod 24, and after the adjacent anti-freezing, blocking and foam removing assemblies above are contacted with the anti-freezing, blocking and foam removing assembly below, the linear motion freedom degree is limited, so that a plurality of anti-freezing, blocking and foam removing assemblies are sequentially contacted to form a dense foam removing grid, and the low-temperature separator 2 is in a working state to remove heavy hydrocarbon.
On the basis of the fourth embodiment, as shown in fig. 2, 7 and 8, an insert block 14 is fixed at the bottom of the upper hollow foam-removing disc 8, a lock block 15 is slidably arranged on the side wall of the insert block 14, the lock block 15 moves along the radial direction of the upper hollow foam-removing disc 8, a slot 16 is formed at the top of the lower hollow foam-removing disc 9, a lock groove 17 is formed on the side wall of the slot 16, when the upper hollow foam-removing disc 8 contacts and connects with the lower hollow foam-removing disc 9, the insert block 14 is fit in the slot 16, the lock block 15 is fit in the lock groove 17, a rectangular groove 18 is formed on the side wall of the insert block 14, one end of the lock block 15 is slidably fit in the rectangular groove 18, a first spring 19 is arranged in the rectangular groove 18, two ends of the first spring 19 are respectively connected with the lock block 15 and the insert block 14, a wedge-shaped surface 20 is arranged at the bottom of one end of the lock block 15, which is far away from the insert block 14, when the first spring 19 is in a normal state, the wedge surface 20 extends into the rectangular groove 18, an upper spring hole 21 is formed in the bottom of the upper hollow foam removing disc 8, a lower spring hole 22 is formed in the top of the lower hollow foam removing disc 9, a second spring 23 is arranged between the upper hollow foam removing disc 8 and the lower hollow foam removing disc 9, one end of the second spring 23 penetrates into the upper spring hole 21 to be connected with the upper hollow foam removing disc 8, the other end penetrates into the lower spring hole 22 to be connected with the lower hollow foam removing disc 9, when the locking piece 15 is matched in the locking groove 17, the second spring 23 is in a compressed state, when a plurality of anti-freezing and anti-freezing foam removing assemblies are sequentially arranged along the axial direction of the low-temperature separator 2 for dredging, after the locking piece 15 is separated from the locking groove 17, under the reaction force of the second spring 23, the lower hollow foam removing disc 9 is ejected from the upper hollow foam removing disc 8, as the second spring 23 cannot reset immediately, and can be in a normal state gradually, so that the lower hollow foam removing disk 9 frequently moves up and down, and the lower hollow foam removing disk 9 generates vibration, the vibration also acts on the upper hollow foam removing disk 8, and on one hand, the plugs solidified on the first transverse foam removing wire 10, the second transverse foam removing wire 11, the first longitudinal foam removing wire 12 and the second longitudinal foam removing wire 13 are continuously dredged in a vibration mode, so that the plugs fall off under the vibration; on the other hand, the fallen plugs are vibrated from the first transverse defoaming wire 10, the second transverse defoaming wire 11, the first longitudinal defoaming wire 12 and the second longitudinal defoaming wire 13 to fall on the bottom of the low-temperature separator 2, so that the dense defoaming grids can be quickly dredged and generate vibration to generate better dredging effect, after the upper hollow defoaming disc 8 and the lower hollow defoaming disc 9 are separated, the locking piece 15 stretches out from the rectangular groove 18 to reset under the reaction of the first spring 19, when dredging is finished, a plurality of antifreezing and blocking defoaming components are reset to be contacted, the lower hollow defoaming disc 9 is limited under the action of the hollow fixed disc 38, the lower hollow ring 26 is in sliding fit with the screw 24, the screw 24 can not drive the lower hollow defoaming disc 9 to rotate, the movement of the lower hollow defoaming disc 9 is driven by the upper hollow defoaming disc 8, because the upper hollow foam-removing disc 8 and the lower hollow foam-removing disc 9 are connected through the second spring 23, after the lower hollow foam-removing disc 9 is limited, the upper hollow foam-removing disc 8 is not influenced to move continuously, the upper hollow foam-removing disc 8 is enabled to move continuously close to the lower hollow foam-removing disc 9, the wedge surface 20 of the locking piece 15 contacts the lower hollow foam-removing disc 9 firstly, the locking piece 15 is enabled to move towards the rectangular groove 18 under the guiding of the wedge surface 20, the locking piece 15 compresses the first spring 19 to move into the rectangular groove 18, the inserting piece 14 can be smoothly matched into the slot 16, after the upper hollow foam-removing disc 8 contacts the lower hollow foam-removing disc 9, the inserting piece 14 is matched into place, at the moment, the locking groove 17 is positioned on the moving path of the locking piece 15, under the reacting force of the first spring 19, the end part of the locking piece 15 stretches out of the rectangular groove 18 to be matched into the locking groove 17, after the upper hollow foam-removing disc 8 contacts the lower hollow foam-removing disc 9 to be limited, the movement is stopped, the upper anti-freezing and anti-blocking foam removing assembly continues to move downwards, after the anti-freezing and anti-blocking foam removing assembly contacts with the lower anti-freezing and anti-blocking foam removing assembly, the lower hollow foam removing disc 9 of the anti-freezing and anti-blocking foam removing assembly stops moving, the corresponding upper hollow foam removing disc 8 continues to move close to the lower hollow foam removing disc 9, so that the locking block 15 is adapted in the locking groove 17 in the same way, the upper hollow foam removing disc 8 is connected with the lower hollow foam removing disc 9, and a plurality of anti-freezing and anti-blocking foam removing assemblies are repeatedly contacted in sequence to form dense foam removing grids; this connected mode can be in a plurality of anti-freezing stifled foam removal subassemblies arrange the back in proper order, unblock again and go up cavity foam removal dish 8 and lower cavity foam removal dish 9 between connected state, makes the reaction force of second spring 23 can be immediately acted on cavity foam removal dish 9 down and produces the vibration, has better mediation effect.
In the fifth embodiment, as shown in fig. 2, 7 and 11, a driving cavity 39 is provided in the lower hollow foam-removing tray 9, the driving cavity 39 communicates the slot 16 with the locking groove 17, a top block 40 is slidably provided in the driving cavity 39, the top block 40 is located below the locking block 15 and moves along the axial direction of the lower hollow foam-removing tray 9, the top block 40 is used for ejecting the locking block 15 from the locking groove 17, a first rack 41 and a second rack 42 are slidably provided in the driving cavity 39, the bottom of the first rack 41 and the bottom of the second rack 42 are both connected with the lower hollow foam-removing tray 9 through a third spring 43, the top block 40 is fixed on the top of the first rack 41, a gear 44 is provided between the first rack 41 and the second rack 42, the gear 44 simultaneously engages the first rack 41 and the second rack 42, the bottom of the second rack 42 is connected with a traction rope 45, the haulage rope 45 passes through the lower part of the hollow fixed disk 38 in a sliding way and then passes out of the low-temperature separator 2, the outer wall of the low-temperature separator 2 is vertically provided with the air cylinder 46, the haulage rope 45 is connected with the telescopic end of the air cylinder 46, the connecting positions of the upper hollow foam removal disks 8 and the lower hollow foam removal disks 9 in the plurality of anti-freezing and anti-blocking foam removal components are staggered along the circumferential direction of the low-temperature separator 2, the situation that the haulage ropes 45 of the plurality of anti-freezing and anti-blocking foam removal components are not wound or interfered can not occur, the plurality of haulage ropes 45 pass out of the same height position of the low-temperature separator 2 and are connected with one air cylinder 46, the plurality of air cylinders 46 can be ensured to be arranged on the same height, namely, the plurality of air cylinders 46 are sequentially arranged along the circumferential direction of the low-temperature separator 2, and in the specific implementation, the haulage ropes 45 can be guided by the fixed pulleys, so that the haulage ropes 45 can smoothly pass out of the low-temperature separator 2, and can stably pull the second rack 42 to move; when the anti-freezing and blocking foam removing assembly moves up or down, the corresponding connecting cylinder 46 stretches or contracts, when the upper hollow foam removing disc 8 and the lower hollow foam removing disc 9 are not unlocked, the traction rope 45 is always in a straightened state, and the second racks 42 cannot be pulled to move, after the anti-freezing and blocking foam removing assemblies are sequentially arranged, the cylinders 46 contract simultaneously, the traction rope 45 pulls the second racks 42 to move downwards, the second racks 42 drive the gear 44 to rotate, the gear 44 drives the first racks 41 to move upwards, thereby driving the top blocks 40 to move upwards, the top blocks 40 are close to the wedge surface 20 of the locking blocks 15, the top blocks 40 act on the wedge surface 20 to squeeze the locking blocks 15 into the rectangular grooves 18, the locking blocks 15 are separated from the locking grooves 17, the lower hollow foam removing disc 9 is separated from the upper hollow foam removing disc 9 under the reaction force of the second springs 23, after the dredging of the anti-freezing and blocking foam removing assemblies, the cylinders 46 synchronously contract and reset, the cylinders 46 of the connecting different anti-freezing and blocking foam removing assemblies are inconsistent in contraction length, the shrinkage length of the gear 44 drives the first racks 41 to move upwards, the top blocks 40 are close to each other, the anti-freezing and blocking foam removing device is in a tight contact with the second racks 9, the anti-freezing and blocking foam removing device is in a tight state is formed, the situation is formed, the anti-freezing and blocking foam removing device is in a tight contact with the hollow foam removing device is in the low temperature is in the state, and the low temperature is easy, and the electric device is in a high-freezing and stable, and the anti-freezing device is easy to remove the anti-freezing and removed, and has a high temperature and a high temperature, and a high temperature device is easy, and a high temperature and easy, and a high temperature resistant performance is easy.
In the description of the present invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "one side," "top," "inner," "front," "center," "two ends," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention; and those of ordinary skill in the art will appreciate that the benefits achieved by the present invention are merely better than those achieved by the current embodiments of the prior art in certain circumstances and are not intended to be the most excellent uses directly in the industry.
The foregoing is merely a preferred embodiment of the invention, and it is to be understood that the invention is not limited to the form disclosed herein but is not to be construed as excluding other embodiments, but is capable of numerous other combinations, modifications and environments and is capable of modifications within the scope of the inventive concept, either as taught or as a matter of routine skill or knowledge in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the invention are intended to be within the scope of the appended claims.
Claims (10)
1. The utility model provides a low temperature washing desorption heavy hydrocarbon prevent frostbite and block up LNG sled dress device installs on sled dress frame, its characterized in that, including cold box (1), low temperature separator (2) and low temperature scrubbing tower (3), the lower part of low temperature scrubbing tower (3) is provided with purified natural gas import (4), the upper portion of low temperature scrubbing tower (3) is provided with low temperature heavy hydrocarbon inlet port (5), low Wen Chongting inlet port (5) are through heavy hydrocarbon pipeline connection the bottom of low temperature separator (2), the top of low temperature scrubbing tower (3) is equipped with gaseous phase export (6), gaseous phase export (6) are connected the A passageway entry of cold box (1), the A passageway exit linkage of cold box (1) the middle part of low temperature separator (2), the top of low temperature separator (2) is equipped with gaseous phase natural gas export (7), gaseous phase natural gas export (7) are connected the B passageway entry of cold box (1);
the utility model discloses a low temperature separator, low temperature separator (2) are internally provided with a plurality of anti-freezing and blocking and defoaming components, a plurality of anti-freezing and blocking and defoaming components are followed in proper order the high direction of low temperature separator (2) slides and sets up, anti-freezing and blocking and defoaming components include cavity upper portion foam disc (8) and cavity lower portion foam disc (9), the top surface of cavity upper portion foam disc (8) is connected with a plurality of first horizontal foam wire (10), the bottom surface of cavity upper portion foam disc (8) is connected with a plurality of second horizontal foam wire (11), a plurality of first horizontal foam wire (10) and a plurality of second horizontal foam wire (11) all are followed the radial equipartition of cavity upper portion foam disc (8), first horizontal foam wire (10) and second horizontal foam wire (11) are followed the circumference direction of cavity upper portion foam disc (8) and are crisscross setting, the top surface of cavity lower portion foam disc (9) is connected with a plurality of first vertical foam wire (12), the second horizontal foam wire (13) are all along the radial equipartition of cavity upper portion foam wire (13) are along the radial equipartition of cavity upper portion foam disc (9), the second transverse defoaming wires (11) in the same antifreezing and blocking defoaming component are contacted with the first longitudinal defoaming wires (12) to form defoaming grids, the first transverse defoaming wires (10) in two adjacent antifreezing and blocking defoaming components are contacted with the second longitudinal defoaming wires (13) to form defoaming grids, a plurality of antifreezing and blocking defoaming components are formed with a plurality of defoaming grids along the height direction of the low-temperature separator (2), and a plurality of defoaming grids are distributed in a staggered manner along the circumferential direction of the low-temperature separator (2);
when the low-temperature separator (2) works, a plurality of anti-freezing, blocking and foam removing components are sequentially contacted and arranged, and are used for enabling a plurality of foam removing grids to form a dense foam removing grid;
when the cryogenic separator (2) is frozen and blocked, a plurality of anti-freezing, blocking and foam removing components are sequentially arranged at intervals, and the upper hollow foam removing disc (8) is separated from the lower hollow foam removing disc (9).
2. The anti-freezing and anti-blocking LNG skid-mounted device for removing heavy hydrocarbons through low-temperature washing according to claim 1, wherein a screw rod (24) is arranged in the rotation mode of the low-temperature separator (2), the screw rod (24) is arranged vertically, the anti-freezing and anti-blocking foam-removing assembly further comprises an upper hollow ring (25) and a lower hollow ring (26), the upper hollow ring (25) is arranged on the upper hollow foam-removing disc (8) concentrically, the outer wall of the upper hollow ring (25) is connected with the inner wall of the upper hollow foam-removing disc (8) through an upper connecting rod (27), the lower hollow ring (26) is concentrically arranged with the lower hollow foam-removing disc (9), the outer wall of the lower hollow ring (26) is connected with the inner wall of the lower hollow foam-removing disc (9) through a lower connecting rod (28), the upper hollow ring (25) is sleeved on the screw rod (24) in a sliding mode, the top of the low-temperature separator (2) is provided with a motor (29), and the lower hollow foam-removing disc (38) is fixedly connected with the screw rod (24).
3. The anti-freezing and anti-blocking LNG skid-mounted device for removing heavy hydrocarbon through low-temperature washing according to claim 2, wherein the upper hollow ring (25) comprises an outer ring (30) and an inner ring (31), the inner ring (31) is sleeved on the screw rod (24) in a threaded manner, a plurality of sealing rings (32) are fixedly sleeved on the outer wall of the inner ring (31), the sealing rings (32) are uniformly distributed along the axial direction of the inner ring (31), an elastic sleeve (33) is wrapped on the sealing rings (32), a plurality of annular grooves (34) are formed in the inner ring of the outer ring (30), the annular grooves (34) correspond to the sealing rings (32) one to one, and the elastic sleeve (33) is matched in the annular grooves (34) through self deformation interference.
4. The anti-freezing and anti-blocking LNG skid-mounted device for removing heavy hydrocarbon through low-temperature washing according to claim 3, wherein a limiting block (35) is fixed on the side wall of the upper hollow foam removing disc (8), a vertical sliding groove (36) is formed in the position, corresponding to the limiting block (35), of the inner wall of the low-temperature separator (2), the limiting block (35) is slidably matched in the vertical sliding groove (36), the limiting blocks (35) in the anti-freezing and anti-blocking foam removing assemblies are uniformly distributed around the circumference direction of the low-temperature separator (2), a blocking block (37) is fixed in the vertical sliding groove (36) corresponding to each anti-freezing and anti-blocking foam removing assembly, and after the anti-freezing and anti-blocking foam removing assemblies are sequentially arranged at intervals, the limiting block (35) in each anti-freezing and anti-blocking foam removing assembly is abutted against the bottom surface of the corresponding blocking block (37).
5. The anti-freezing and anti-blocking LNG skid-mounted device for removing heavy hydrocarbon through low-temperature washing according to claim 2, wherein an inserting block (14) is fixed at the bottom of the upper hollow foam removing disc (8), a locking block (15) is slidably arranged on the side wall of the inserting block (14), the locking block (15) moves along the radial direction of the upper hollow foam removing disc (8), a slot (16) is formed in the top of the lower hollow foam removing disc (9), a locking groove (17) is formed in the side wall of the slot (16), and when the upper hollow foam removing disc (8) contacts and is connected with the lower hollow foam removing disc (9), the inserting block (14) is matched in the slot (16), and the locking block (15) is matched in the locking groove (17).
6. The anti-freezing and anti-blocking LNG skid-mounted device for removing heavy hydrocarbons through low-temperature washing according to claim 5, wherein a rectangular groove (18) is formed in the side wall of the insertion block (14), one end of the locking block (15) is slidably matched with the rectangular groove (18), a first spring (19) is arranged in the rectangular groove (18), two ends of the first spring (19) are respectively connected with the locking block (15) and the insertion block (14), a wedge-shaped surface (20) is arranged at the bottom of one end, away from the insertion block (14), of the locking block (15), when the first spring (19) is in a normal state, the locking block (15) is matched with the locking groove (17), and the wedge-shaped surface (20) extends into the rectangular groove (18).
7. The anti-freezing and anti-blocking LNG skid-mounted device for removing heavy hydrocarbons through low-temperature washing according to claim 6, wherein an upper spring hole (21) is formed in the bottom of the upper hollow foam removing disc (8), a lower spring hole (22) is formed in the top of the lower hollow foam removing disc (9), a second spring (23) is arranged between the upper hollow foam removing disc (8) and the lower hollow foam removing disc (9), one end of the second spring (23) penetrates into the upper spring hole (21) to be connected with the upper hollow foam removing disc (8), the other end of the second spring penetrates into the lower spring hole (22) to be connected with the lower hollow foam removing disc (9), and when the locking block (15) is adapted into the locking groove (17), the second spring (23) is in a compressed state.
8. The anti-freezing and anti-blocking LNG skid-mounted device for removing heavy hydrocarbons through low-temperature washing according to claim 7, wherein a driving cavity (39) is arranged in the lower hollow foam removal disc (9), the driving cavity (39) is communicated with the slot (16) and the locking groove (17), a jacking block (40) is arranged in the driving cavity (39) in a sliding manner, the jacking block (40) is located below the locking block (15) and moves along the axial direction of the lower hollow foam removal disc (9), and the jacking block (40) is used for ejecting the locking block (15) from the locking groove (17).
9. The anti-freezing and anti-blocking LNG skid-mounted device for removing heavy hydrocarbons through low-temperature washing according to claim 8, wherein a first rack (41) and a second rack (42) are arranged in the driving cavity (39) in a sliding mode, the bottom of the first rack (41) and the bottom of the second rack (42) are connected with the lower hollow foam removal tray (9) through a third spring (43), the top block (40) is fixed at the top of the first rack (41), a gear (44) is arranged between the first rack (41) and the second rack (42), the gear (44) is simultaneously meshed with the first rack (41) and the second rack (42), a traction rope (45) is connected to the bottom of the second rack (42), the traction rope (45) is penetrated out of the low-temperature separator (2) after sliding below the hollow fixed tray (38), an air cylinder (46) is vertically arranged on the outer wall of the low-temperature separator (2), and the traction rope (45) is connected with the telescopic end of the traction cylinder (46).
10. The anti-freezing and plugging LNG skid-mounted device for removing heavy hydrocarbons through low-temperature washing according to claim 1, wherein a liquid-phase circulating pump (47) is arranged on a heavy hydrocarbon pipeline, the bottom of the low-temperature washing tower (3) is connected with a demethanizer tower (49) through a liquid-phase pipeline (48), the top and the bottom of the demethanizer tower (49) are respectively connected with a fuel tank (50) and a first electric heating reboiler (51), the first electric heating reboiler (51) is connected with a debutanizer (52), the bottom and the top of the debutanizer (52) are respectively connected with a second electric heating reboiler (53) and a tower top air cooler (54), the tower top air cooler (54) is connected with a reflux tank (55), and the second electric heating reboiler (53) is connected with a tower bottom air cooler (56).
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| CN202311207302.1A CN117304992B (en) | 2023-09-19 | 2023-09-19 | Anti-freezing and anti-blocking LNG skid-mounted device for removing heavy hydrocarbon through low-temperature washing |
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| CN202311207302.1A CN117304992B (en) | 2023-09-19 | 2023-09-19 | Anti-freezing and anti-blocking LNG skid-mounted device for removing heavy hydrocarbon through low-temperature washing |
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| CN117304992B CN117304992B (en) | 2024-06-04 |
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| CN117304992B (en) | 2024-06-04 |
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