CN111536413A - Device for directly utilizing LNG cold energy to drive LNG high-pressure pump to gasify - Google Patents
Device for directly utilizing LNG cold energy to drive LNG high-pressure pump to gasify Download PDFInfo
- Publication number
- CN111536413A CN111536413A CN202010358180.6A CN202010358180A CN111536413A CN 111536413 A CN111536413 A CN 111536413A CN 202010358180 A CN202010358180 A CN 202010358180A CN 111536413 A CN111536413 A CN 111536413A
- Authority
- CN
- China
- Prior art keywords
- cylinder
- cng
- storage tank
- pressure
- plunger pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000006200 vaporizer Substances 0.000 claims abstract description 30
- 238000001514 detection method Methods 0.000 claims description 7
- 238000002309 gasification Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 52
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 238000007599 discharging Methods 0.000 description 6
- 239000003345 natural gas Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Images
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
- F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
- F17C9/02—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure with change of state, e.g. vaporisation
-
- 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
-
- 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
- F17C13/04—Arrangement or mounting of valves
-
- 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
- F17C3/00—Vessels not under 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
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0323—Valves
-
- 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
- F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, 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
- F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
- F17C2223/036—Very high pressure (>80 bar)
-
- 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
- F17C2225/0107—Single phase
- F17C2225/0123—Single phase gaseous, e.g. CNG, GNC
-
- 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
- F17C2227/0135—Pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention relates to a device for driving an LNG high-pressure pump to gasify by directly utilizing LNG cold energy, and belongs to the technical field of cold energy application. An apparatus for driving a LNG high-pressure pump to gasify by directly utilizing LNG cold energy, the apparatus comprising the following equipment units: the plunger pump and the cylinder are linked through a plunger pump connecting rod and a cylinder connecting rod which are fixedly connected; a vaporizer that receives LNG from the plunger pump; a high pressure storage tank receiving high pressure CNG from the gasifier after gasification; a CNG storage tank receiving CNG from the first cylinder chamber and the second cylinder chamber, and one of the CNG storage tanks simultaneously receiving high pressure CNG from a high pressure storage tank. The invention provides a device which takes LNG cold energy as all power and continuously pressurizes LNG to a vaporizer to vaporize the LNG without any external input power.
Description
Technical Field
The invention relates to a device for driving an LNG high-pressure pump to gasify by directly utilizing LNG cold energy, in particular to a device for pressurizing LNG to a high-pressure gasifier to gasify under the condition that the LNG cold energy is used as all power and no external input power is needed, and belongs to the technical field of cold energy application.
Background
At present, an LNG receiving station pressurizes and gasifies LNG and inputs the LNG into a natural gas pipeline, and an LNG-CNG filling station pressurizes and gasifies the LNG and fills the LNG into an industrial steel cylinder or a CNG automobile, wherein a power motor is used for driving an LNG pump to pressurize the LNG and inputting the LNG into a gasifier to gasify the LNG. In a large-link medium-petroleum LNG receiving station, LNG is pressurized to 1MPa from a tank by a low-pressure pump and is conveyed to a high-pressure pump. The high-pressure pump pressurizes LNG to 10MPa, and then the LNG is conveyed to a gasifier for gasification and export. Wherein: the low-pressure pump power is 310Kw and 460 cubic meters per hour, the high-pressure pump power is 2069Kw and 435 cubic meters per hour, and the annual electric charge reaches more than 700 ten thousand yuan. In a common LNG-CNG filling station, LNG is pressurized to 20MPa, the power of a motor is 30-60KW, and the annual electric charge is about 12 ten thousand. Meanwhile, the high-power motor is in an inflammable and explosive area, and has great safety risk.
The LNG cold energy is taken as a green and environment-friendly energy technology, but the LNG cold energy is taken as all power, and a device for pressurizing the LNG to a high-pressure gasifier for gasification under the condition of not needing any external input power does not exist, and no relevant research results exist at home and abroad.
The LNG cold energy is used as all power, the LNG is pressurized to the vaporizer to be vaporized under the condition that no external input power is needed, the LNG is pressurized to the high-pressure vaporizer to absorb the energy of a large amount of air or seawater and is vaporized into high-pressure gas, a large amount of kinetic energy is stored, the kinetic energy is effectively utilized and directly drives the LNG pump, a large amount of electric energy can be saved, the investment of electric power facilities and power utilization safety protection facilities is reduced, and the safety risk of an operation place is greatly reduced.
Disclosure of Invention
In view of the above problems, the present invention provides an apparatus for vaporizing LNG by pressurizing LNG to a vaporizer without any external power input, using LNG cold energy as the entire power.
An apparatus for driving a LNG high-pressure pump to gasify by directly utilizing LNG cold energy, the apparatus comprising the following equipment units:
the plunger pump is horizontally arranged and comprises a plunger pump cylinder body, a plunger pump piston and a plunger rod; the plunger pump piston divides the plunger pump cylinder body into a first chamber far away from the cylinder and a second chamber close to the cylinder; the first chamber is communicated with an LNG source through an inlet pipeline and communicated with a gasifier through an LNG outlet pipeline;
a horizontally disposed cylinder including a cylinder liner, a cylinder piston, and a cylinder connecting rod; the cylinder piston divides the cylinder sleeve into a first cylinder chamber close to the plunger pump and a second cylinder chamber far away from the plunger pump; the first cylinder chamber is communicated with at least one gas outlet pipeline and one gas inlet pipeline; the second cylinder chamber communicates with at least one gas outlet conduit and one gas inlet conduit; the first cylinder chamber receives high pressure CNG from a high pressure storage tank through a gas inlet conduit, and the second cylinder chamber receives high pressure CNG from a high pressure storage tank through a gas inlet conduit;
the plunger pump piston and the cylinder piston move left and right, and the plunger pump piston and the cylinder piston are linked through a plunger pump connecting rod and a cylinder connecting rod which are fixedly connected;
a vaporizer, said vaporizer receiving LNG from the plunger pump;
a high pressure storage tank receiving vaporized high pressure CNG from the vaporizer;
at least one CNG storage tank receiving CNG from a first cylinder chamber and a second cylinder chamber, and wherein one CNG storage tank simultaneously receives high pressure CNG from a high pressure storage tank;
a plurality of pipelines communicated with each equipment unit and valves for controlling the circulation of the pipelines.
The "plunger pump" of the present invention is a plunger pump disclosed in the prior art, which is commercially available or assembled according to the methods disclosed in the prior art. The plunger pump mainly comprises a plunger pump cylinder body, a plunger pump piston and a plunger rod component, except other components. In the device, the plunger pump is horizontally arranged, the piston of the plunger pump reciprocates along the horizontal direction, the plunger pump piston forms two chambers positioned at two sides of the piston in the reciprocating motion, the two chambers are respectively named as a first chamber and a second chamber, and the volumes of the two chambers are continuously changed along with the motion of the piston. E.g., when the piston is at the leftmost side, the first chamber volume is zero; conversely, when the piston is at the rightmost side, the second chamber volume is zero.
The cylinder mainly comprises a cylinder sleeve, a cylinder piston and a cylinder connecting rod, except other components. In the device, the cylinder is horizontally arranged, and the cylinder connecting rod and the plunger pump connecting rod are fixedly connected at the same horizontal height, so that the plunger pump piston and the cylinder piston can be linked. Similar to the plunger pump, the cylinder piston divides the cylinder jacket into two cylinder chambers, namely a first cylinder chamber and a second cylinder chamber, and the volumes of the two cylinder chambers are constantly changed along with the movement of the piston.
The "vaporizer" of the present invention is a vaporizer for LNG disclosed in the prior art and is commercially available.
The invention relates to a high-pressure storage tank and a CNG storage tank, which are storage tanks available in the prior art for CNG storage. Preferably, the storage tank is provided with an internal pressure detection and control device to control the internal pressure of the storage tank not to exceed a set value and ensure the safe operation of the storage tank.
The device comprises a pressure detection device, wherein the pressure detection device is used for detecting the pressure of each equipment unit, and the pressure detection device is in control connection with at least one valve on the equipment unit and is used for ensuring that the pressure in the equipment unit does not exceed a set threshold value.
The valves, conduits and their connections of the present invention are commercially available and can be assembled as desired by those skilled in the art.
Further, the high-pressure storage tank and the CNG storage tank both have set pressure thresholds, and the pressure threshold set by the high-pressure storage tank is larger than the pressure threshold set by the CNG storage tank. Further, when the apparatus comprises more than two CNG tanks, the set pressure thresholds for the respective tanks are different.
The target constant output pressure P0 of the present invention refers to the pressure of CNG in the CNG tank, such as the target cylinder charge pressure.
Preferably, when the apparatus comprises a CNG tank, the CNG tank is set to a target constant output pressure P0, and the high pressure tank is set to a pressure threshold of 2P0 ± 40%; when the apparatus comprises more than two CNG tanks, the set pressure thresholds of the respective tanks are different, and the set pressure threshold of the first CNG tank is the target constant output pressure P0 ± 40%, and the set pressure threshold of the high pressure tank is 2P0 ± 40%; the other CNG tanks are sequentially reduced from the set pressure threshold of the first CNG tank.
Further preferably, when the apparatus comprises two CNG tanks, the set pressure threshold for the first CNG tank is the target constant output pressure P0 ± 40%, and the set pressure threshold for the second CNG tank is 0.5P0 ± 40%; the set pressure threshold of the high-pressure storage tank is 2P0 +/-40%; when the apparatus comprises three CNG tanks, the set pressure threshold for the first CNG tank is the target constant output pressure P0 ± 40%, and the set pressure threshold for the second CNG tank is 2/3P0 ± 40%; the set pressure threshold for the third CNG tank is 1/3P0 ± 40%; the set pressure threshold for the high pressure tank is 2/3P0 + -40%.
A preferred technical scheme of the invention is as follows: an apparatus for driving a LNG high-pressure pump to gasify by directly utilizing LNG cold energy, the apparatus comprising the following equipment units:
the plunger pump is horizontally arranged and comprises a plunger pump cylinder body, a plunger pump piston and a plunger rod; the plunger pump piston divides the plunger pump cylinder body into a first chamber far away from the cylinder and a second chamber close to the cylinder; the first chamber is communicated with an LNG source through an inlet pipeline and communicated with a gasifier through an LNG outlet pipeline;
a horizontally disposed cylinder including a cylinder liner, a cylinder piston, and a cylinder connecting rod; the cylinder piston divides the cylinder sleeve into a first cylinder chamber close to the plunger pump and a second cylinder chamber far away from the plunger pump; the first cylinder chamber is communicated with at least one gas outlet pipeline and one gas inlet pipeline; the second cylinder chamber communicates with at least one gas outlet conduit and one gas inlet conduit; the first cylinder chamber receives high pressure CNG from a high pressure storage tank through a gas inlet conduit, and the second cylinder chamber receives high pressure CNG from a high pressure storage tank through a gas inlet conduit;
the plunger pump piston and the cylinder piston move left and right, and the plunger pump piston and the cylinder piston are linked through a plunger pump connecting rod and a cylinder connecting rod which are fixedly connected;
a vaporizer, said vaporizer receiving LNG from the plunger pump;
a high pressure storage tank receiving vaporized high pressure CNG from the vaporizer;
a CNG storage tank receiving CNG from the first cylinder chamber and the second cylinder chamber, and simultaneously receiving high pressure CNG from the high pressure storage tank;
a plurality of pipelines communicated with each equipment unit and valves for controlling the circulation of the pipelines.
Further, the pressure threshold set by the high-pressure storage tank is 25 MPa; and the set pressure threshold of the CNG storage tank is 10 MPa.
Another preferred technical scheme of the invention is as follows: an apparatus for driving a LNG high-pressure pump to gasify by directly utilizing LNG cold energy, the apparatus comprising the following equipment units:
the plunger pump is horizontally arranged and comprises a plunger pump cylinder body, a plunger pump piston and a plunger rod; the plunger pump piston divides the plunger pump cylinder body into a first chamber far away from the cylinder and a second chamber close to the cylinder; the first chamber is communicated with an LNG source through an inlet pipeline and communicated with a gasifier through an LNG outlet pipeline;
a horizontally disposed cylinder including a cylinder liner, a cylinder piston, and a cylinder connecting rod; the cylinder piston divides the cylinder sleeve into a first cylinder chamber close to the plunger pump and a second cylinder chamber far away from the plunger pump; the first cylinder chamber is communicated with at least one gas outlet pipeline and one gas inlet pipeline; the second cylinder chamber communicates with at least one gas outlet conduit and one gas inlet conduit; the first cylinder chamber receives high pressure CNG from a high pressure storage tank through a gas inlet conduit, and the second cylinder chamber receives high pressure CNG from a high pressure storage tank through a gas inlet conduit;
the plunger pump piston and the cylinder piston move left and right, and the plunger pump piston and the cylinder piston are linked through a plunger pump connecting rod and a cylinder connecting rod which are fixedly connected;
a vaporizer, said vaporizer receiving LNG from the plunger pump;
a high pressure storage tank receiving vaporized high pressure CNG from the vaporizer;
three CNG storage tanks, a first CNG storage tank, a second CNG storage tank and a third CNG storage tank, wherein the three CNG storage tanks receive CNG from a first cylinder chamber and a second cylinder chamber respectively, and the third CNG storage tank simultaneously receives high-pressure CNG from a high-pressure storage tank;
a plurality of pipelines communicated with each equipment unit and valves for controlling the circulation of the pipelines.
Further, the pressure threshold set by the high-pressure storage tank is 40 MPa; the pressure threshold value set by the first CNG storage tank is 25MPa, the pressure threshold value set by the second CNG storage tank is 15MPa, and the pressure threshold value set by the third CNG storage tank is 6 MPa.
Or the pressure threshold value set by the high-pressure storage tank is 40 MPa; the pressure threshold value set by the first CNG storage tank is 20MPa, the pressure threshold value set by the second CNG storage tank is 12MPa, and the pressure threshold value set by the third CNG storage tank is 6 MPa.
The invention has the beneficial effects that: the invention provides a device which takes LNG cold energy as all power and continuously pressurizes LNG to a vaporizer to vaporize the LNG without any external input power.
Drawings
Fig. 1 is a device for driving an LNG high-pressure pump to gasify by directly using LNG cold energy as described in example 1.
Fig. 2 is the device for driving the LNG high-pressure pump to gasify by directly utilizing the LNG cold energy described in embodiment 2.
Detailed Description
The following non-limiting examples are presented to enable those of ordinary skill in the art to more fully understand the present invention and are not intended to limit the invention in any way.
The test methods described in the following examples are all conventional methods unless otherwise specified; the reagents and materials are commercially available, unless otherwise specified.
Example 120 MPa Industrial Steel Cylinder filling
The device for directly driving the LNG high-pressure pump to gasify by utilizing the LNG cold energy is described by combining the attached figure 1 and comprises a cylinder, a piston, a connecting rod, a valve, a control valve, a plunger pump, a gasifier, a safety valve, a pressure reducer, a pipeline and a storage tank.
The cylinder comprises a cylinder sleeve 1, a cylinder piston 2 and a cylinder connecting rod 3; the plunger pump 4 is provided with a plunger pump connecting rod 5, and the cylinder connecting rod 3 is fixedly connected with the plunger pump connecting rod 5 through a fixed connecting device 6;
the plunger pump 4 is connected with an LNG inlet pipeline 24 and an LNG outlet pipeline 25; the outlet pipeline 25 is connected with a gasifier 26, the outlet of the gasifier is connected with a CNG pipeline 27, and the CNG pipeline 27 is connected with a storage tank 28; the high-pressure storage tank 28 is connected with an outlet pipeline 29, the outlet pipeline 29 is connected with control valves 30 and 31, the valve 30 is connected with the valve 7 through a pipeline, and the valve 31 is connected with the valve 14 through a pipeline 32;
the high storage tank 28 is connected with an outlet pipeline 34, the outlet pipeline 34 is connected with a safety valve 35, the safety valve 35 is connected with a pressure reducing valve 36, and the pressure reducing valve 36 is connected with the storage tank 23 through a pipeline 37;
the storage tanks 28, 23, 22 and 21 are respectively connected with pipelines 38, 39, 40 and 41, the pipelines 38, 39, 40 and 41 are respectively connected with control valves 42, 43, 44 and 45, the control valves 42, 43, 44 and 45 are connected with output pipelines 46, 47, 48 and 49, and high-pressure gas with different pressures is output.
The low-pressure LNG enters the plunger pump 4 through the LNG pipeline 24, is pressurized by the plunger pump 4 and enters the vaporizer 26 through the high-pressure LNG pipeline 25, and the LNG is vaporized into high-pressure CNG through the vaporizer 26 and enters the high-pressure storage tank 28 through the pipeline 27;
when in use, the cylinder valves 7, 8, 9, 11, 12 and 13 are closed, the valves 10 and 14 are opened, the high-pressure gas in the storage tank 28 enters the cylinder sleeve 1 through the pipeline 29, the control valve 31 and the valve 14 to push the cylinder piston 2 to move, the gas on the other side of the cylinder piston 2 is discharged through the valve 10 and enters the storage tank 21 through the pipeline 17, the cylinder piston 2 pushes the plunger pump 4 to suck LNG through the cylinder connecting rod 3, the plunger pump connecting rod 5 and the fixed connecting device 6, and after the piston 2 reaches the top point, valve 14 is closed, valve 13 is opened, and gas is vented, via line 18, to reservoir 23, when the pressure difference between the pressure in the storage tank 23 and the pressure in the cylinder is less than 5 percent, the valve 13 is closed, the valve 12 is opened, the gas enters the storage tank 22 through the pipeline 19, when the pressure difference between the pressure in the storage tank 22 and the air cylinder is less than 5%, closing the valve 12, opening the valve 11 and discharging the gas into the storage tank 21; opening a valve 7, enabling high-pressure gas to enter a cylinder 1 from a storage tank 28 through a pipeline 29, controlling the valve 30 and the valve 7 to push a cylinder piston 2 to move, discharging gas on the other side of the cylinder piston 2 through a valve 11, enabling the gas to enter a storage tank 21 through a pipeline 20, and enabling high-pressure LNG discharged by a plunger pump to enter a gasifier through a pipeline 25 to be gasified into high-pressure CNG; after the piston 2 reaches the top, the valves 7 and 11 are closed, the valve 8 is opened, and high-pressure gas is discharged into the storage tank 23 through the pipeline 15; closing the valve 8, opening the valve 9, and discharging the gas into the storage tank 22 through the pipeline 16; closing the valve 9, opening the valve 10, and discharging the gas into the storage tank 21 through the pipeline 17; valve 14 is opened and the next cycle is entered.
When the storage tank 28 is overpressurized, the overpressure gas is discharged into the storage tank 23 through the pipe 34, the safety valve 35, the pressure reducer 36 and the pipe 37.
The storage tanks 21, 22, 23, 28 respectively store gas from low to high, the storage tank 21 has the lowest pressure, the storage tank 28 has the highest pressure, the storage tank 28 is a high-pressure storage tank, the storage tank 23 is a first CNG storage tank, the storage tank 22 is a second CNG storage tank, and the storage tank 21 is a third CNG storage tank. The pressure of the storage tank 28 is set to be 40MPa, the pressure of the storage tank 23 is set to be 25MPa, the pressure of the storage tank 22 is set to be 15MPa, the pressure of the storage tank 21 is set to be 6MPa, and when the pressure of the storage tank 23 and the pressure of the storage tank 21 are over-pressurized, the control valves 30 and 31 are closed, and the storage tank 28 is stopped outputting high-pressure gas.
The storage tanks 21, 22, 23 and 28 are filled with low-pressure gas in the storage tank 21 through a pipeline 49 by opening the control valve 45 when the steel cylinders are filled; then the control valve 45 is closed, the control valve 44 is opened, and the gas in the storage tank 22 is filled through the pipeline 48; then control valve 44 is closed, control valve 43 is opened, and the gas in tank 23 is filled via pipe 47; then the control valve 43 is closed, the control valve 42 is opened, and the gas in the storage tank 28 is filled through the pipeline 46; high-pressure CNG filling of more than 20MPa can be realized.
The outlet speed of the high-pressure gas can be adjusted by adjusting the sizes of the control valves 30 and 31, so that the reciprocating motion speed of the piston is realized.
When the process is carried out, the opening and closing of the valve can be mechanically controlled, and the control system can also be used for carrying out electrical control.
Referring to fig. 2, a device for directly using LNG cold energy to drive an LNG high-pressure pump to gasify differs from embodiment 1 in that the device includes a CNG storage tank, which is as follows:
setting the pressure of the storage tank 28 to be 25MPa, the pressure of the storage tank 21 to be 10MPa, discharging overpressure gas into the storage tank 23 when the storage tank 28 is in overpressure, and closing the control valves 30 and 31 to stop the storage tank 28 from outputting high-pressure gas when the storage tank 21 is in overpressure.
Install valve 7, 8, 13, 14 on having 4 business turn over gas ports on the cylinder jacket 1, wherein: the valve 8 is connected with the pipeline 15 and then connected with the storage tank 23; the valve 13 is connected with the pipeline 18 and then connected with the storage tank 23;
the plunger pump 4 is connected with an LNG inlet pipeline 24 and an LNG outlet pipeline 25; the outlet pipeline 25 is connected with a gasifier 26, the outlet of the gasifier is connected with a CNG pipeline 27, the CNG pipeline 27 is connected with a storage tank 28, the storage tank 28 is connected with an outlet pipeline 29, the outlet pipeline 29 is connected with control valves 30 and 31, the valve 30 is connected with the valve 7 through a pipeline, and the valve 31 is connected with the valve 14 through a pipeline 32;
the storage tank 28 is connected with an outlet pipeline 34, the outlet pipeline 34 is connected with a safety valve 35, the safety valve 35 is connected with a pressure reducing valve 36, and the pressure reducing valve 36 is connected with the storage tank 23 through a pipeline 37;
the tanks 28 and 23 are connected to pipes 38, 39, 40 and 41, respectively, the pipes 38 and 39 are connected to control valves 42 and 43, respectively, and the control valves 42 and 43 are connected to output pipes 46 and 47, respectively, to output high-pressure gas having different pressures.
The low-pressure LNG enters the plunger pump 4 through the LNG pipeline 24, is pressurized by the plunger pump 4 and enters the vaporizer 26 through the high-pressure LNG pipeline 25, and the LNG is vaporized into high-pressure CNG through the vaporizer 26 and enters the storage tank 28 through the pipeline 27;
the cylinder valves 7 and 13 are closed, the valves 8 and 14 are opened, high-pressure gas in the storage tank 28 enters the cylinder sleeve 1 through the pipeline 29, the control valve 31 and the valve 14 and pushes the cylinder piston 2 to move, gas on the other side of the cylinder piston 2 is discharged through the valve 8 and enters the storage tank 21 through the pipeline 17, the cylinder piston 2 pushes the plunger pump 4 to suck LNG through the cylinder connecting rod 3, the plunger pump connecting rod 5 and the fixed connecting device 6, after the piston 2 reaches the top point, the valve 14 is closed, the valve 13 is opened, the gas is discharged and enters the storage tank 23 through the pipeline 18; opening a valve 7, enabling high-pressure gas to enter a cylinder 1 from a storage tank 28 through a pipeline 29, controlling the valve 30 and the valve 7 to push a piston 2 to move, discharging gas on the other side of the piston 2 through a valve 13, enabling the gas to enter a storage tank 23 through a pipeline 18, enabling high-pressure LNG discharged by a plunger pump to enter a gasifier through a pipeline 25 and be gasified into high-pressure CNG; after the piston 2 reaches the top, the valves 7, 13 are closed, the valves 8, 14 are opened, and the high-pressure gas is discharged into the storage tank 23 through the pipeline 15, and enters the next cycle.
When the storage tank 28 is overpressurized, the overpressure gas is discharged into the storage tank 23 through the pipe 34, the safety valve 35, the pressure reducer 36 and the pipe 37.
The 10MPa natural gas in the storage tank 23 enters a high-pressure natural gas pipeline after being processed.
The 25MPa high pressure CNG in the storage tank 28 can be loaded and sold to CNG filling stations.
The outlet speed of the high-pressure gas can be adjusted by adjusting the sizes of the control valves 30 and 31, so that the reciprocating motion speed of the piston is realized.
When the process is carried out, the opening and closing of the valve can be mechanically controlled, and the control system can also be used for carrying out electrical control.
Claims (8)
1. The utility model provides a device that directly utilizes LNG cold energy drive LNG high-pressure pump to gasify which characterized in that: the device comprises the following equipment units:
the plunger pump is horizontally arranged and comprises a plunger pump cylinder body, a plunger pump piston and a plunger rod; the plunger pump piston divides the plunger pump cylinder body into a first chamber far away from the cylinder and a second chamber close to the cylinder; the first chamber is communicated with an LNG source through an inlet pipeline and communicated with a gasifier through an LNG outlet pipeline;
a horizontally disposed cylinder including a cylinder liner, a cylinder piston, and a cylinder connecting rod; the cylinder piston divides the cylinder sleeve into a first cylinder chamber close to the plunger pump and a second cylinder chamber far away from the plunger pump; the first cylinder chamber is communicated with at least one gas outlet pipeline and one gas inlet pipeline; the second cylinder chamber communicates with at least one gas outlet conduit and one gas inlet conduit; the first cylinder chamber receives high pressure CNG from a high pressure storage tank through a gas inlet conduit, and the second cylinder chamber receives high pressure CNG from a high pressure storage tank through a gas inlet conduit;
the plunger pump piston and the cylinder piston move left and right, and the plunger pump piston and the cylinder piston are linked through a plunger pump connecting rod and a cylinder connecting rod which are fixedly connected;
a vaporizer, said vaporizer receiving LNG from the plunger pump;
a high pressure storage tank receiving vaporized high pressure CNG from the vaporizer;
at least one CNG storage tank receiving CNG from a first cylinder chamber and a second cylinder chamber, and wherein one CNG storage tank simultaneously receives high pressure CNG from a high pressure storage tank;
a plurality of pipelines communicated with each equipment unit and valves for controlling the circulation of the pipelines.
2. The apparatus of claim 1, wherein: the high-pressure storage tank and the CNG storage tank are both provided with set pressure thresholds;
when the apparatus comprises a CNG tank, the CNG tank is set to a target constant output pressure P0, and the high pressure tank is set to a pressure threshold of 2P0 ± 40%;
when the apparatus comprises more than two CNG tanks, the set pressure thresholds of the respective tanks are different, and the set pressure threshold of the first CNG tank is the target constant output pressure P0 ± 40%, and the set pressure threshold of the high pressure tank is 2P0 ± 40%; the other CNG tanks are sequentially reduced from the set pressure threshold of the first CNG tank.
3. The apparatus of claim 2, wherein:
when the apparatus comprises two CNG tanks, the set pressure threshold for the first CNG tank is the target constant output pressure P0 ± 40%, and the set pressure threshold for the second CNG tank is 0.5P0 ± 40%; the set pressure threshold of the high-pressure storage tank is 2P0 +/-40%;
when the apparatus comprises three CNG tanks, the set pressure threshold for the first CNG tank is the target constant output pressure P0 ± 40%, and the set pressure threshold for the second CNG tank is 2/3P0 ± 40%; the set pressure threshold for the third CNG tank is 1/3P0 ± 40%; the set pressure threshold for the high pressure tank is 2P0 ± 40%.
4. The apparatus of claim 1, wherein: the device comprises the following equipment units:
the plunger pump is horizontally arranged and comprises a plunger pump cylinder body, a plunger pump piston and a plunger rod; the plunger pump piston divides the plunger pump cylinder body into a first chamber far away from the cylinder and a second chamber close to the cylinder; the first chamber is communicated with an LNG source through an inlet pipeline and communicated with a gasifier through an LNG outlet pipeline;
a horizontally disposed cylinder including a cylinder liner, a cylinder piston, and a cylinder connecting rod; the cylinder piston divides the cylinder sleeve into a first cylinder chamber close to the plunger pump and a second cylinder chamber far away from the plunger pump; the first cylinder chamber is communicated with at least one gas outlet pipeline and one gas inlet pipeline; the second cylinder chamber communicates with at least one gas outlet conduit and one gas inlet conduit; the first cylinder chamber receives high pressure CNG from a high pressure storage tank through a gas inlet conduit, and the second cylinder chamber receives high pressure CNG from a high pressure storage tank through a gas inlet conduit;
the plunger pump piston and the cylinder piston move left and right, and the plunger pump piston and the cylinder piston are linked through a plunger pump connecting rod and a cylinder connecting rod which are fixedly connected;
a vaporizer, said vaporizer receiving LNG from the plunger pump;
a high pressure storage tank receiving vaporized high pressure CNG from the vaporizer;
a CNG storage tank receiving CNG from the first cylinder chamber and the second cylinder chamber, and simultaneously receiving high pressure CNG from the high pressure storage tank;
a plurality of pipelines communicated with each equipment unit and valves for controlling the circulation of the pipelines.
5. The apparatus of claim 4, wherein: the pressure threshold value set by the high-pressure storage tank is 25 MPa; and the set pressure threshold of the CNG storage tank is 10 MPa.
6. The apparatus of claim 1, wherein: the device comprises the following equipment units:
the plunger pump is horizontally arranged and comprises a plunger pump cylinder body, a plunger pump piston and a plunger rod; the plunger pump piston divides the plunger pump cylinder body into a first chamber far away from the cylinder and a second chamber close to the cylinder; the first chamber is communicated with an LNG source through an inlet pipeline and communicated with a gasifier through an LNG outlet pipeline;
a horizontally disposed cylinder including a cylinder liner, a cylinder piston, and a cylinder connecting rod; the cylinder piston divides the cylinder sleeve into a first cylinder chamber close to the plunger pump and a second cylinder chamber far away from the plunger pump; the first cylinder chamber is communicated with at least one gas outlet pipeline and one gas inlet pipeline; the second cylinder chamber communicates with at least one gas outlet conduit and one gas inlet conduit; the first cylinder chamber receives high pressure CNG from a high pressure storage tank through a gas inlet conduit, and the second cylinder chamber receives high pressure CNG from a high pressure storage tank through a gas inlet conduit;
the plunger pump piston and the cylinder piston move left and right, and the plunger pump piston and the cylinder piston are linked through a plunger pump connecting rod and a cylinder connecting rod which are fixedly connected;
a vaporizer, said vaporizer receiving LNG from the plunger pump;
a high pressure storage tank receiving vaporized high pressure CNG from the vaporizer;
three CNG storage tanks, a first CNG storage tank, a second CNG storage tank and a third CNG storage tank, wherein the three CNG storage tanks receive CNG from a first cylinder chamber and a second cylinder chamber respectively, and the third CNG storage tank simultaneously receives high-pressure CNG from a high-pressure storage tank;
a plurality of pipelines communicated with each equipment unit and valves for controlling the circulation of the pipelines.
7. The apparatus of claim 6, wherein: the pressure threshold value set by the high-pressure storage tank is 40 MPa; the pressure threshold set by the first CNG storage tank is 25MPa, the pressure threshold set by the second CNG storage tank is 15MPa, and the pressure threshold set by the third CNG storage tank is 6 MPa;
or the pressure threshold value set by the high-pressure storage tank is 40 MPa; the pressure threshold value set by the first CNG storage tank is 20MPa, the pressure threshold value set by the second CNG storage tank is 12MPa, and the pressure threshold value set by the third CNG storage tank is 6 MPa.
8. The apparatus of claim 1, wherein: the device comprises a pressure detection device, wherein the pressure detection device is used for detecting the pressure of each equipment unit, and the pressure detection device is in control connection with at least one valve on the equipment unit and is used for ensuring that the pressure in the equipment unit does not exceed a set threshold value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010358180.6A CN111536413B (en) | 2020-04-29 | 2020-04-29 | Device for directly utilizing LNG cold energy to drive LNG high-pressure pump to gasify |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010358180.6A CN111536413B (en) | 2020-04-29 | 2020-04-29 | Device for directly utilizing LNG cold energy to drive LNG high-pressure pump to gasify |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111536413A true CN111536413A (en) | 2020-08-14 |
| CN111536413B CN111536413B (en) | 2022-04-08 |
Family
ID=71973207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010358180.6A Active CN111536413B (en) | 2020-04-29 | 2020-04-29 | Device for directly utilizing LNG cold energy to drive LNG high-pressure pump to gasify |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111536413B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116357540A (en) * | 2023-03-20 | 2023-06-30 | 江南造船(集团)有限责任公司 | Supercharging device for utilizing cold energy of liquefied gas |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1138152A (en) * | 1995-04-26 | 1996-12-18 | 株式会社荏原制作所 | Liquefied gas supply system |
| EP1306604A2 (en) * | 2001-10-29 | 2003-05-02 | Chart Inc. | Cryogenic fluid delivery system |
| CN2797677Y (en) * | 2005-06-01 | 2006-07-19 | 曾灿民 | Heat engine by using low temp liquid/gas conversion energy |
| CN104948909A (en) * | 2015-05-20 | 2015-09-30 | 岳阳长岭炼化通达建筑安装工程有限公司 | Liquefied gas self-pressurization vaporization conveying system and liquefied gas self-pressurization vaporization conveying method |
| CN105757449A (en) * | 2016-04-26 | 2016-07-13 | 杭州西港低温技术有限公司 | Vehicle LNG active pressurization system and gas supply method thereof |
| CN206830400U (en) * | 2017-06-15 | 2018-01-02 | 天津佰焰科技股份有限公司 | A kind of low temperature L CNG duplex plunger pumps sled uses liquid storage discharge chamber |
-
2020
- 2020-04-29 CN CN202010358180.6A patent/CN111536413B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1138152A (en) * | 1995-04-26 | 1996-12-18 | 株式会社荏原制作所 | Liquefied gas supply system |
| EP1306604A2 (en) * | 2001-10-29 | 2003-05-02 | Chart Inc. | Cryogenic fluid delivery system |
| CN2797677Y (en) * | 2005-06-01 | 2006-07-19 | 曾灿民 | Heat engine by using low temp liquid/gas conversion energy |
| CN104948909A (en) * | 2015-05-20 | 2015-09-30 | 岳阳长岭炼化通达建筑安装工程有限公司 | Liquefied gas self-pressurization vaporization conveying system and liquefied gas self-pressurization vaporization conveying method |
| CN105757449A (en) * | 2016-04-26 | 2016-07-13 | 杭州西港低温技术有限公司 | Vehicle LNG active pressurization system and gas supply method thereof |
| CN206830400U (en) * | 2017-06-15 | 2018-01-02 | 天津佰焰科技股份有限公司 | A kind of low temperature L CNG duplex plunger pumps sled uses liquid storage discharge chamber |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116357540A (en) * | 2023-03-20 | 2023-06-30 | 江南造船(集团)有限责任公司 | Supercharging device for utilizing cold energy of liquefied gas |
| CN116357540B (en) * | 2023-03-20 | 2025-07-15 | 江南造船(集团)有限责任公司 | A liquefied gas cooling energy utilization boosting device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111536413B (en) | 2022-04-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2022135109A1 (en) | Liquid hydrogen storage type hydrogenation apparatus capable of pre-cooling by liquid hydrogen | |
| US8978715B2 (en) | Method for filling a tank with pressurized gas | |
| CN103452612A (en) | Compressed air energy storage system using carbon dioxide as working medium | |
| CN217540363U (en) | Hydrogenation system | |
| CN102213361B (en) | Liquid ethylene storage tank, liquid ethylene storage and gasification system and liquid ethylene gasification method | |
| CN103343881A (en) | Technology of BOG recovery and device thereof | |
| CN201206726Y (en) | LCNG mobile charging stations system | |
| CN112483887A (en) | Buried liquid hydrogen storage type hydrogenation device | |
| CN214249133U (en) | Liquid hydrogen storage type hydrogenation device adopting liquid hydrogen precooling | |
| US20250027610A1 (en) | Method of compressing hydrogen gas, hydrogen gas compressor system and hydrogen gas storage unit | |
| CN211374355U (en) | Ultrahigh pressure hydrogen pressure test system | |
| CN104165266B (en) | A kind of pressure reduction formula liquefied natural gas filling station adds injection system and method thereof | |
| CN111536413B (en) | Device for directly utilizing LNG cold energy to drive LNG high-pressure pump to gasify | |
| CN114526443A (en) | Control system for hydrogen switching | |
| CN102650373B (en) | L-CNG (Liquid-Compressed Natural Gas) skid-mounted device without energy consumption | |
| CN116428509A (en) | A liquid hydrogen booster filling system driven by thermal booster and hydrogen compressor | |
| CN201034242Y (en) | Energy-saving liquefied natural gas automatically gasifying and aerating means | |
| CN215294565U (en) | Hydrogen supply system | |
| CN214249132U (en) | Buried liquid hydrogen storage type hydrogenation device | |
| CN203176717U (en) | Carbon dioxide pressurizing and deeply-burying device | |
| CN112414002A (en) | Two-phase flow jet refrigeration system for BOG recovery and BOG recovery method | |
| CN116105074A (en) | High-pressure nitrogen gas supply device and control method thereof | |
| CN113324163B (en) | An optimized L-CNG filling station tank pressurization system and pressurization method | |
| RU2400645C1 (en) | System to store and feed gas into transport facility "vniigaz" | |
| CN116182064A (en) | Liquid hydrogen pressurizing and filling system driven by cooperation of heat and power |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |