CN106090603B - Liquefied petroleum gas residual liquid recovery system and method - Google Patents
Liquefied petroleum gas residual liquid recovery system and method Download PDFInfo
- Publication number
- CN106090603B CN106090603B CN201610607397.XA CN201610607397A CN106090603B CN 106090603 B CN106090603 B CN 106090603B CN 201610607397 A CN201610607397 A CN 201610607397A CN 106090603 B CN106090603 B CN 106090603B
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- liquefied gas
- liquefied
- tank
- gas storage
- residual liquid
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- 239000007788 liquid Substances 0.000 title claims abstract description 73
- 239000003915 liquefied petroleum gas Substances 0.000 title claims abstract description 42
- 238000011084 recovery Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000007789 gas Substances 0.000 claims abstract description 280
- 238000003860 storage Methods 0.000 claims abstract description 119
- 239000000284 extract Substances 0.000 claims abstract description 7
- 238000004064 recycling Methods 0.000 claims description 11
- 238000002309 gasification Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 2
- 239000010865 sewage Substances 0.000 claims 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 8
- 239000012071 phase Substances 0.000 description 7
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000001294 propane Substances 0.000 description 4
- 239000007791 liquid phase Substances 0.000 description 3
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000001535 kindling effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005501 phase interface Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
- F17C7/02—Discharging liquefied gases
-
- 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
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
- F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
-
- 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
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/01—Shape
- F17C2201/0104—Shape cylindrical
- F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
-
- 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
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/03—Orientation
- F17C2201/032—Orientation with substantially vertical main axis
-
- 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
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/05—Size
- F17C2201/056—Small (<1 m3)
-
- 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
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/032—Hydrocarbons
- F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
-
- 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
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
-
- 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
- F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
- F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
- F17C2225/0146—Two-phase
- F17C2225/0153—Liquefied gas, e.g. LPG, GPL
-
- 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
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/01—Propulsion of the fluid
- F17C2227/0128—Propulsion of the fluid with pumps or compressors
- F17C2227/0157—Compressors
-
- 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
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/06—Controlling or regulating of parameters as output values
- F17C2250/0605—Parameters
- F17C2250/0626—Pressure
-
- 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
- F17C2270/00—Applications
- F17C2270/05—Applications for industrial use
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention provides a liquefied petroleum gas raffinate recovery system and a method. The liquefied petroleum gas raffinate recovery system includes: the device comprises a liquefied gas compressor, a liquefied gas storage tank, a liquefied gas residual tank and a tank car; the liquefied gas compressor is respectively connected with the liquefied gas storage tank, the liquefied gas residual tank and the tank wagon; the liquefied gas residual liquid tank is respectively connected with the liquefied gas storage tank and the tank wagon; the tank wagon is connected with the liquefied gas storage tank; the liquefied gas compressor extracts the liquefied gas in the liquefied gas residue tank, the liquefied gas compressor pressurizes the liquefied gas in the liquefied gas residue tank and then injects the pressurized liquefied gas into the liquefied gas storage tank, and residual liquid in the liquefied gas storage tank is discharged into the liquefied gas residue tank. The method for recovering the residual liquid of the liquefied petroleum gas adopts the residual liquid recovery system of the liquefied petroleum gas. The invention can use the inherent compressor of the storage and distribution station, and has low investment, simplicity and convenience.
Description
Technical field
The present invention relates to fields, and in particular to the remaining air-liquid recycling in liquefied petroleum gas storage tank, especially a kind of liquefaction stone
Oil gas raffinate recovery system and method.
Background technique
Liquefied petroleum gas main component is C3、C4Alkane and alkene, also containing a small amount of ethylene, second hydrocarbon, pentane etc..Normal
Temperature is lower can be allowed to liquefy using lower pressure, be stored in storage tank in liquid form.It is a kind of cleaning, easily green energy
Source is increasingly subject to the attention and concern of people.In liquefied petroleum gas using stage, tank bottom can have small part liquid not to the end
It can vaporize, this partially liq is known as raffinate, generally 5~20%.The main component of raffinate is C5And it a small amount of is not gasified totally
C4Component, there are also hydrogen sulfide, water, impurity etc..In air after release, raffinate is easier to volatilize, spread and burn than gasoline,
Certain economic loss is not only caused to user, but also can cause raffinate kindling, explosion and casualty accident, causes environmental pollution.
But the fuel value of raffinate is higher, is a kind of good raw material of industry, will be energy-saving if extraction utilization can be carried out raffinate,
Generate good economic benefit.
Currently, the raffinate draw-out device that large-scale liquefied gas station is equipped with, mainly utilizes nitrogen charging device, nitrogen is conveyed to pressure
Raffinate after compressor boost in reinfusate gas cylinder, is extruded by means of nitrogen pressure and is transported to raffinate storage by contracting machine
In storage, then the nitrogen in steel cylinder is evacuated with vacuum pump and reaches certain vacuum degree.This device extracts complex process, at
This height, it is difficult to be received by more liquefied gas stations.
In conclusion in the prior art the prior art has at least the following problems: existing liquefied petroleum gas recovery process is complicated, cost
It is high.
Summary of the invention
The present invention provides a kind of LPG residual liquid recovery system and method, to solve existing liquefied petroleum gas recycling
Complex process, problem at high cost.
For this purpose, the present invention proposes a kind of LPG residual liquid recovery system, the LPG residual liquid recovery system
Include:
Liquefied gases compressor, liquefied gas storage, liquefied gas residue tank and tank car；
Wherein；
Liquefied gases compressor is connect with liquefied gas storage, liquefied gas residue tank and tank car respectively；
The liquefied gas residue tank is connect with the liquefied gas storage and tank car respectively；
The tank car is connect with the liquefied gas storage；
The liquefied gases compressor extracts the liquefied gas of the liquefied gas residue tank, and the liquefied gases compressor is by the liquid
The liquefied gas storage is injected after changing the liquefied gas pressurization of gas residual liquid tank, the raffinate in the liquefied gas storage is drained into described
In liquefied gas residue tank.
Further, the liquefied gas storage includes: the first liquefied gas storage and the second liquefied gas storage in parallel.
Further, the liquefied gas storage is equipped with sewerage pipeline, and the sewerage pipeline is compressed with liquefied gas respectively
Machine, liquefied gas residue tank, liquefied gas storage gasification installation be connected.
Further, the liquefied gas storage includes: 1~8 tank body in parallel.
Further, the volume of the liquefied gas residue tank is 2~20m3。
Further, 2~8 row's valve groups are respectively set in the inlet and outlet of the liquefied gases compressor, to control liquefaction
The disengaging of gas flows to.
Further, liquid level emasuring device is equipped in the liquefied gas storage；The liquid level emasuring device by respectively with
Liquefied gases compressor and tank car are connected.
Further, the liquefied gases compressor is connected with the first liquefied gas storage, the second liquefied gas storage respectively, and
And described it is connected respectively with liquefied gas residue tank, tank car；First liquefied gas storage is connected with the second liquefied gas storage；
The liquefied gas residue tank is connected with the first liquefied gas storage, the second liquefied gas storage and tank car respectively, from tank car or
The finished product liquefied petroleum gas of pipe network is supplied respectively to the first liquefied gas storage or the second liquefied gas storage.
The present invention also proposes a kind of LPG residual liquid recovery method, is returned using mentioned-above LPG residual liquid
Receipts system, the LPG residual liquid recovery method include:
Step A: the liquefied gas of liquefied gas residual liquid tank is extracted with liquefied gases compressor；
Step B: it is pressurizeed with liquefied gas of the liquefied gases compressor to the liquefied gas residue tank；
Step C: the liquefied gas after pressurization is injected into the liquefied gas storage, the raffinate in liquefied gas storage is drained into institute
It states in liquefied gas residue tank.
Further, the LPG residual liquid recovery method further include: step D: after step c, by residual liquid tank
In raffinate be transported in tank car.
The present invention extracts the liquefied gas of liquefied gas residual liquid tank, the liquefaction to the liquefied gas residue tank with liquefied gases compressor
Gas pressurization, then injects the liquefied gas storage for the liquefied gas after pressurization, the raffinate in liquefied gas storage is drained into described
In liquefied gas residue tank, this process does not need the participation of the third gas (such as nitrogen), and the raffinate in liquefied gas storage is added
It presses the power recycled as raffinate to also eliminate the process vacuumized without additionally increasing inert gas, therefore, reduces
Cost, recovery efficiency are high.
The present invention make use of liquefied petroleum gas itself steam, and the system of pressurized recycling raffinate can reduce cost recovery, letter
It is single practical, the use of other equipment is not influenced, and recovering effect is good.
The present invention recycles raffinate, energy saving, realizes waste utilization, turns waste into wealth；With easy to operate, highly-safe
The features such as.
Detailed description of the invention
Fig. 1 is the LPG residual liquid recovery system of the embodiment of the present invention or the process flow chart of method；
Fig. 2 is the pipeline jointing construction schematic diagram of liquefied gases compressor；
Fig. 3 is the pipeline jointing construction schematic diagram of the first liquefied gas storage；
Fig. 4 is the pipeline jointing construction schematic diagram of the second liquefied gas storage；
Fig. 5 is the pipeline jointing construction schematic diagram of liquefied gas residue tank.
Drawing reference numeral explanation:
1- liquefied gases compressor；
The first liquefied gas storage of 2-；
The second liquefied gas storage of 3-；
4- liquefied gas residue tank；
5- tank car；
6- pipeline；
7- pipeline；
8- pipeline；
9- pipeline；
10- pipeline；
11- pipeline；
12- pipeline；
13- pipeline；
14- pipeline；
15- pipeline；
16- pipeline；
17- pipeline；
V1-V26- valve.
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, this hair of Detailed description of the invention is now compareed
It is bright.
As shown in Figure 1, the present invention provides a kind of LPG residual liquid recovery system, the LPG residual liquid recycling
System includes:
Liquefied gases compressor 1, liquefied gas storage, liquefied gas residue tank 4 and tank car 5；
Wherein；
Liquefied gases compressor 1 is connect with liquefied gas storage, liquefied gas residue tank 4 and tank car 5 respectively；
The liquefied gas residue tank 4 is connect with the liquefied gas storage and tank car 5 respectively；
The tank car 5 is connect with the liquefied gas storage；
Liquefied gases compressor pressurizes for compressed liquefied gas or to liquefied gas, using the original compressor of gas holder station, that is, adopts
With existing air compressor, reduce investment outlay.
Liquefied gas residue tank, top is gas phase zone, lower part is liquid phase region.Compressor extracts organic gas such as the propane in gas phase
On the one hand body reduces the pressure in residual liquid tank, flows into after in addition compressing as the raffinate in powered liquefied gas horizontal tank
Residual liquid tank.
Liquefied gases compressor 1 pushes as shown in Fig. 2, being connected respectively with liquefied gas residue tank 4 and tank car 5 by pipeline
Raffinate enters tank car.
Liquefied gases compressor is opened, the liquefied gas evaporation in liquefied gas residue tank, (liquefied gas residue tank middle and upper part is gas
State, lower part are liquid) liquefied gases compressor 1 extracts the liquefied gas of the liquefied gas residue tank 4, the then liquefied gas
Compressor 1 injects the liquefied gas storage after the liquefied gas of the liquefied gas residue tank 4 pressurizes, will be in the liquefied gas storage
Raffinate be drained into the liquefied gas residue tank 4.
Liquefied gas storage can be liquefied gas horizontal tank.Further, as shown in Figure 1, the liquefied gas storage includes:
First liquefied gas storage 2 and the second liquefied gas storage 3 in parallel.Liquefied gases compressor, by pipeline and the first liquefied gas storage,
Second liquefied gas storage is connected, and supplies organic gas for it, provides power for drain.In this way, two storages can be separately recovered
Tank does not influence between each other.
Further, the liquefied gas storage is equipped with sewerage pipeline, and the sewerage pipeline is compressed with liquefied gas respectively
Machine, liquefied gas residue tank, liquefied gas storage gasification installation be connected, being capable of timely blowdown.For example, as shown in figure 3, the first liquid
Change gas storage tank 2 and be equipped with valve V13, as shown in figure 4, the second liquefied gas storage 3 is equipped with valve V18, is used for blowdown.
Further, the liquefied gas storage includes: eight tank bodies in parallel.1~8 liquefied gas can be stored up respectively in this way
Tank carries out normal work of the drain without influencing other storage tanks.
Further, the volume of the liquefied gas residue tank is 2~20m3.In such manner, it is possible to which it is residual to accommodate suitable liquefied gas
Liquid can guarantee that top is gas phase zone, lower part is liquid phase region, guarantee to provide enough power.
Further, 2~8 row's valve groups are respectively set in the inlet and outlet of the liquefied gases compressor, to control liquefaction
The disengaging of gas flows to.
Further, liquid level emasuring device is equipped in the liquefied gas storage；The liquid level emasuring device by respectively with
Liquefied gases compressor and tank car are connected.
Further, liquefied gases compressor 1 is connected by pipeline 6 with the first liquefied gas storage 2, passes through pipeline 7 and the
Two liquefied gas storages 3 are connected, and are connected by pipeline 15 with liquefied gas residue tank 4, are connected by pipeline 17 with tank car 5；
First liquefied gas storage 1 passes through pipeline 8, pipeline 11, pipeline 9, pipeline 12, pipeline 10,13 phase of pipeline with the second liquefied gas storage 2
Connection；
As shown in figure 5, liquefied gas residue tank 4 by pipeline 14, pipeline 9, pipeline 12 respectively with the first liquefied gas storage 2,
Second liquefied gas storage 3 is connected, and is connected by pipeline 16 with tank car.
Finished product liquefied petroleum gas from tank car or pipe network enters the first liquefied gas storage by pipeline 10 and valve V12,
The second liquefied gas storage 3 is injected by pipeline 13, valve V17.In use, valve V10, V15 transportation of liquefied gas can be opened individually
For users to use to gasification installation.
When discharging raffinate in the first liquefied gas storage, valve V12, valve V10 are closed, valve V25, valve V21, valve
V11 is opened, and valve V20, valve V3 are opened, and valve V8, valve V9 are opened.Liquefied gases compressor is opened, in liquefied gas residue tank
Liquefied gas evaporation, by pipeline 15, into liquefied gases compressor 1, after pressurization through valve V8 by pipeline 6 injection first liquefaction
Gas storage tank 2, with the increase of pressure in tank, the raffinate of tank bottom enters liquefied gas residue tank 4 along pipeline 9, pipeline 14, completes to 1
The drain operation of number storage tank (the first liquefied gas storage 2).No. 2 storage tanks (the second liquefied gas storage 3) can normal work in the process
Make.By similar operation, the raffinate in No. 2 storage tanks (the second liquefied gas storage 3) can be discharged, without influencing No. 1 storage tank
It operates normally.
When the liquid level in liquefied gas residue tank 4 reaches high liquid level, raffinate can be transported in tank car 5.Close drain pipe
The related valve on related valve, pipeline 6 (be used for air inlet), pipeline 7 (being used for air inlet) on road 14, the valve in opening conduits 15
Door V20, valve V4, open valve V22, valve V1.Liquefied gases compressor is opened, the liquefied gas pressurization of gas-phase space in tank car 5
It is inputted in liquefied gas residue tank by valve V4, pipeline 15, with pressure rise, raffinate is pushed to flow to tank car liquid phase interface.This
Outside, liquefied gases compressor 1 is equipped with valve V2, valve V5 and V7, and the first liquefied gas storage 2 is equipped with valve V13, the second liquefaction
Gas storage tank 3 is equipped with valve V18, and liquefied gas residue tank 4 is equipped with valve V24.After raffinate recycles, residual liquid tank disengaging is closed
All valves of mouth.
The present invention also proposes a kind of LPG residual liquid recovery method, is returned using mentioned-above LPG residual liquid
Receipts system, the LPG residual liquid recovery method include:
Step A: the liquefied gas of liquefied gas residual liquid tank is extracted with liquefied gases compressor；
Step B: it is pressurizeed with liquefied gas of the liquefied gases compressor to the liquefied gas residue tank；
Step C: the liquefied gas after pressurization is injected into the liquefied gas storage, the raffinate in liquefied gas storage is drained into institute
It states in liquefied gas residue tank.
Further, the LPG residual liquid recovery method further include: step D: after step c, by residual liquid tank
In raffinate be transported in tank car.In such manner, it is possible to which efficiently the raffinate in residual liquid tank is transported in tank car, recycling is thorough, grasps
Make easy, safety.
LPG residual liquid recovery method embodiment 1 of the invention:
According to shown in Fig. 1, the raffinate in the first liquefied gas storage is discharged, and No. 2 storage tanks (the second liquefied gas storage 3) are normal
When work, it can perform the following operation.Close valve V16, valve V14, valve V10, valve V12；Open valve V11, valve
V25, valve V21；Open valve V20, valve V3, valve V8, valve V9；Liquefied gases compressor 1 is opened, compressor is from liquefied gas
The organic gas such as propane are extracted in residual liquid tank 4, and through valve V8 after pressurization, the first liquefied gas storage 2 is entered by pipeline 6, with
Pressure inside the tank constantly increases, and raffinate is pushed to enter in liquefied gas residue tank 4 from pipeline 9 (being used for drain), pipeline 14.Drain finishes
Afterwards, valve V11, pipeline V10, pipeline V9 are closed, liquefied gases compressor is closed.Open valve V12 can be carried out filling liquefaction
The work of oil gas.
To No. 2 interior raffinates of liquefied gas storage (the second liquefied gas storage 3), and No. 1 (the first liquid of liquefied gas storage 2 is discharged
Change gas storage tank 2) work normally when, can proceed as follows.Close valve V11, valve V17, valve V15；Opening valve V16,
Valve V26, valve V25, valve V21, valve V20, valve V3, valve V6, valve V14.Liquefied gases compressor 1 is opened, from liquid
Change the organic gas such as extraction propane in gas residual liquid tank 4 and the second liquefied gas storage is transported to by pipeline 7 through valve V6 after pressurization
3.As pressure inside the tank gradually rises, raffinate in tank is pushed to be discharged into liquefied gas residue tank 4 from pipeline 12.Drain finishes,
Close compressor, closing valve V14, valve V16, Open valve V17 is that the second liquefied gas storage is filled.
LPG residual liquid recovery method embodiment 2 of the invention:
According to shown in Fig. 1, the liquid tankage vehicle operation in liquefied gas residue tank 4 is as follows.Close valve V21, Open valve
V22, valve V1, valve V4, valve V19, valve V20, valve V23.Liquefied gases compressor 1 is opened, gas phase portion in tank car 5
The organic gas such as propane are after compressor pressurizes, and through valve V4, enter liquefied gas residue tank 4 by pipeline 15, with tank internal pressure
The raising of power pushes pot liquid to flow into tank car by pipeline 16, and tank car entrucking finishes, close compressor, valve V20, valve
V22, valve V19, valve V23, to carry out next operation.
The present invention can carry out pressurization to gas phase condensation gas using the compressor in gas holder station and provide recycling power, have operation
The advantages that easy, at low cost, drain is thorough.The intrinsic compressor of gas holder station can be used in the present invention, and investment is low, succinct convenient.
The foregoing is merely the schematical specific embodiment of the present invention, the range being not intended to limit the invention.For this
Each component part of invention can be combined with each other under conditions of not conflicting, any those skilled in the art, not depart from this
Made equivalent changes and modifications, should belong to the scope of protection of the invention under the premise of the conceptions and principles of invention.
Claims (7)
1. a kind of LPG residual liquid recovery system, which is characterized in that the LPG residual liquid recovery system includes:
Liquefied gases compressor, liquefied gas storage, liquefied gas residue tank and the tank car for recycling raffinate；
Wherein；
Liquefied gases compressor is connect with liquefied gas storage, liquefied gas residue tank and tank car for recycling raffinate respectively；
Tank car of the liquefied gas residue tank respectively with the liquefied gas storage and for recycling raffinate is connect；
The tank car for recycling raffinate is connect with the liquefied gas storage；
The liquefied gases compressor extracts the liquefied gas of the liquefied gas residue tank, and the liquefied gases compressor is by the liquefied gas
The liquefied gas storage is injected after the liquefied gas pressurization of residual liquid tank, the raffinate in the liquefied gas storage is drained into the liquefaction
In gas residual liquid tank；
The liquefied gas storage includes: the first liquefied gas storage and the second liquefied gas storage in parallel；
The liquefied gases compressor is connected with the first liquefied gas storage, the second liquefied gas storage respectively, and the liquefied gas
Compressor is connected with liquefied gas residue tank, for recycling the tank car of raffinate respectively；First liquefied gas storage and the second liquid
Change gas storage tank to be connected；The liquefied gas residue tank respectively with the first liquefied gas storage, the second liquefied gas storage and be used for back
The tank car for receiving raffinate is connected, and the finished product liquefied petroleum gas from tank car or pipe network is supplied respectively to the first liquefied gas storage or second
Liquefied gas storage；
When discharging raffinate in the first liquefied gas storage, the liquefied gases compressor is first made to be connected with first liquefied gas storage
Logical, the liquefied gases compressor is connected with the residual liquid tank, and the residual liquid tank is connected with first liquefied gas storage, then
Open liquefied gases compressor；The raffinate of first liquefied gas storage is discharged, and the second liquefied gas storage works normally.
2. LPG residual liquid recovery system as described in claim 1, which is characterized in that the liquefied gas storage is equipped with row
Sewage pipeline, the sewerage pipeline gasification installation phase with liquefied gases compressor, liquefied gas residue tank, liquefied gas storage respectively
Connection.
3. LPG residual liquid recovery system as described in claim 1, which is characterized in that the appearance of the liquefied gas residue tank
Product is 2 ~ 20m3。
4. LPG residual liquid recovery system as described in claim 1, which is characterized in that the liquefied gases compressor into
2 ~ 8 row's valve groups are respectively set in mouth and outlet, to control the disengaging flow direction of liquefied gas.
5. LPG residual liquid recovery system as described in claim 1, which is characterized in that be equipped in the liquefied gas storage
Liquid level emasuring device；The liquid level emasuring device is connected with liquefied gases compressor and tank car respectively.
6. a kind of LPG residual liquid recovery method, which is characterized in that residual using liquefied petroleum gas as described in claim 1
Liquid recovery system, the LPG residual liquid recovery method include:
Step A: the liquefied gas of liquefied gas residual liquid tank is extracted with liquefied gases compressor；
Step B: it is pressurizeed with liquefied gas of the liquefied gases compressor to the liquefied gas residue tank；
Step C: the liquefied gas after pressurization is injected into the liquefied gas storage, the raffinate in liquefied gas storage is drained into the liquid
Change in gas residual liquid tank.
7. LPG residual liquid recovery method as claimed in claim 6, which is characterized in that the LPG residual liquid returns
Receiving method further include: step D: after step c, the raffinate in residual liquid tank is transported in the tank car for being used to recycle raffinate.
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| CN107289322B (en) * | 2017-08-17 | 2020-01-17 | 四川东晨燃气有限公司 | Dimethyl ether storage and filling system for town gas |
| CN108057256B (en) * | 2017-12-25 | 2020-04-28 | 广州赛诺石化股份有限公司 | Oil gas recovery device |
| CN109084172A (en) * | 2018-08-29 | 2018-12-25 | 江苏省特种设备安全监督检验研究院 | Liquefied gas tanker residual air remnant liquid recovering device |
| CN110110986A (en) * | 2019-04-29 | 2019-08-09 | 东莞市盛源石油化工有限公司 | A kind of comprehensive energy supply system and its business model |
| CN112984373A (en) * | 2019-12-17 | 2021-06-18 | 大庆金星燃气股份有限公司 | Liquefied petroleum gas residual liquid recovery system and method |
| CN114659024B (en) * | 2022-04-25 | 2024-06-25 | 湖北浠水蓝天联合气体有限公司 | Residual liquid recovery and energy optimization system |
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| CN203671240U (en) * | 2014-01-23 | 2014-06-25 | 山东省特种设备检验研究院聊城分院 | Liquefied petroleum gas tank emptying device |
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| CN2134581Y (en) * | 1992-08-10 | 1993-05-26 | 盖县锅炉压力容器检验所 | Recovery device for residual liquid of liquefied petroleum gas steel bottle |
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