CN110296322B - Liquid CO 2 Loading and unloading vehicle integrated device and application method thereof - Google Patents

Liquid CO 2 Loading and unloading vehicle integrated device and application method thereof Download PDF

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Publication number
CN110296322B
CN110296322B CN201910696137.8A CN201910696137A CN110296322B CN 110296322 B CN110296322 B CN 110296322B CN 201910696137 A CN201910696137 A CN 201910696137A CN 110296322 B CN110296322 B CN 110296322B
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China
Prior art keywords
pipeline
liquid
ball valve
loading
unloading
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CN201910696137.8A
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CN110296322A (en
Inventor
赵大庆
王潜忠
郭志强
商永滨
高飞
李刚
张凤喜
李熊林
罗政权
董巍
李言
王瑞英
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China National Petroleum Corp
Xian Changqing Technology Engineering Co Ltd
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China National Petroleum Corp
Xian Changqing Technology Engineering Co Ltd
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Priority to CN201910696137.8A priority Critical patent/CN110296322B/en
Publication of CN110296322A publication Critical patent/CN110296322A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17DPIPE-LINE SYSTEMS; PIPE-LINES
    • F17D1/00Pipe-line systems
    • F17D1/02Pipe-line systems for gases or vapours
    • F17D1/04Pipe-line systems for gases or vapours for distribution of gas
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17DPIPE-LINE SYSTEMS; PIPE-LINES
    • F17D1/00Pipe-line systems
    • F17D1/08Pipe-line systems for liquids or viscous products
    • F17D1/082Pipe-line systems for liquids or viscous products for cold fluids, e.g. liquefied gas
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17DPIPE-LINE SYSTEMS; PIPE-LINES
    • F17D1/00Pipe-line systems
    • F17D1/08Pipe-line systems for liquids or viscous products
    • F17D1/14Conveying liquids or viscous products by pumping
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17DPIPE-LINE SYSTEMS; PIPE-LINES
    • F17D3/00Arrangements for supervising or controlling working operations
    • F17D3/01Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17DPIPE-LINE SYSTEMS; PIPE-LINES
    • F17D5/00Protection or supervision of installations
    • F17D5/02Preventing, monitoring, or locating loss

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)

Abstract

The invention protects a liquid CO 2 The integrated device for the loading and unloading truck and the application method thereof are characterized in that a liquid phase pipeline, a gas phase pipeline, a vent pipeline and a loading and unloading truck pump are integrated and skid-mounted on a skid base, so that the integrated device for the loading and unloading truck is integrally moved, recycled and quickly mounted, the construction period is shortened, the occupied area is reduced, and the engineering investment is reduced. In particular, the invention can be mutually switched with another device under the accident state of the storage tank and the loading and unloading vehicle pump, and the exchange of the tank reversing and loading and unloading vehicle pump between the storage tanks can achieve the safe operation of equipment and facilities.

Description

Liquid CO 2 Loading and unloading vehicle integrated device and application method thereof
Technical Field
The invention belongs to the field of oilfield ground engineering, and particularly relates to liquid CO 2 A loading and unloading vehicle integrated device and an application method thereof.
Background
At present, most water-flooding reservoirs enter the middle and later stages of development, the water content of the oil field is high, the water-flooding control degree is low, and the crude oil recovery rate is further improved by developing a tertiary oil recovery technology. CO 2 The oil displacement technology is used as an effective recovery ratio improving technology, small-scale experimental development is carried out on part of oil fields, and a good development effect is obtained.
CO 2 The oil displacement technology and the recovery ratio improvement technology are to inject CO into the stratum 2 The oil is fully reacted under the oil reservoir condition to release gas, and the gas is dissolved in the crude oil, so that the viscosity of the crude oil is reduced, the volume of the crude oil is expanded, and the purpose of improving the recovery ratio of the crude oil is achieved.
Currently, CO 2 The oil displacement technology adopts liquid CO in field test of oil field 2 Tank wagon is pulled to transport, liquid CO 2 And (3) a high-pressure injection process after the storage tank storage and injection equipment is boosted. When in liquid state CO 2 When the tank car is pulled to a station, the liquid CO in the tank car is pumped by a car unloading pump 2 Discharging into a storage tank when CO 2 When the oil displacement technology is applied to oil fields on a large scale, a large amount of liquid CO is needed 2 Unloading, while liquid CO between tanks is required for ease of management and reduced safety risks 2 Requiring mutual pouring or liquid CO in the tanks 2 Discharged to liquid CO 2 The tank car is transferred.
However, large amounts of liquid CO 2 Liquid CO between unloading and storage tanks 2 Pouring the liquid CO in the storage tank 2 Discharged to liquid CO 2 Tank car transfer, need construction and recoveryThe miscellaneous pipeline equipment has long construction period and large occupied area, and a large amount of disassembly personnel and workload are needed during relocation, thereby being time-consuming and labor-consuming and inconvenient to overhaul and maintain.
Disclosure of Invention
The embodiment of the invention provides a liquid CO 2 Loading and unloading vehicle integrated device and application method thereof, and aims to solve the problem of the existing CO 2 Tank wagon and CO 2 Between the storage tanks, CO 2 Storage tank and CO 2 Transfer of CO between tanks 2 In the process, the construction period of the transfer pipeline is long and the transfer pipeline cannot be reused; the second purpose is to solve the problems that the transfer pipeline cannot be moved integrally, the disassembly workload is large, and the investment of engineering funds is large.
In order to solve the technical problems, the invention provides a liquid CO 2 The loading and unloading truck integrated device comprises a first liquid phase pipeline, wherein one end of the first liquid phase pipeline is used for being connected with CO 2 The liquid phase end of the tank car is connected with the first ball valve through a pipeline, the first ball valve is connected with the second ball valve through a liquid inlet pipeline of the loading and unloading pump, the second ball valve is connected with the inlet of the loading and unloading pump through a liquid inlet pipeline of the loading and unloading pump, the outlet of the loading and unloading pump is connected with the third ball valve through a liquid outlet pipeline of the loading and unloading pump, the third ball valve is connected with one end of the second liquid phase pipeline, and the other end of the second liquid phase pipeline is connected with CO 2 A storage tank A;
the second liquid phase pipeline is communicated with a liquid inlet pipeline of the loading and unloading truck pump through a branch pipeline I, and a fourth ball valve is connected to the branch pipeline I in series; the pipeline between the first ball valve and the second ball valve is communicated with the pump outlet pipeline of the loading and unloading truck through a branch pipeline II, and a fifth ball valve is connected to the branch pipeline II in series;
the pump outlet pipeline of the loading and unloading vehicle is connected with a second pressure transmitter through a second stop valve; the pipeline between the first ball valve and the second ball valve is connected with a first pressure transmitter through a first stop valve;
the first liquid phase pipeline, the first ball valve, the second ball valve, the liquid inlet pipeline of the loading and unloading vehicle pump, the liquid outlet pipeline of the loading and unloading vehicle pump, the third ball valve, the second liquid phase pipeline, the branch pipeline I and the branch pipeline II are all integrated and skid-mounted on the skid base.
The skid seat is also provided with a third liquid phase pipeline, one end of the third liquid phase pipeline is connected with the branch pipeline II, and the other end is connected with CO outside the skid seat 2 And a storage tank B, wherein a sixth ball valve and a seventh ball valve are connected in series on the third liquid phase pipeline, and the sixth ball valve is close to the fifth ball valve.
Liquid CO 2 The integrated device of loading and unloading truck integration further comprises a blow-down pipeline which is skid-mounted on the skid base, one end of the blow-down pipeline extends out of the skid base to blow down, the other end of the blow-down pipeline is connected with two pipelines which are a branch pipeline III and a branch pipeline IV respectively, the branch pipeline III is connected with a pipeline between a first ball valve and a second ball valve through an eleventh ball valve, the tenth ball valve is connected on the branch pipeline IV in series, the end part of the branch pipeline IV, which is far away from the blow-down pipeline, is connected with two gas pipelines which are a first gas pipeline and a second gas pipeline respectively, and the first gas pipeline is connected with CO through an eighth ball valve 2 The gas phase end of the tank car, one end of the second gas phase pipeline far away from the branch line IV is connected with CO 2 Emptying interface and CO of storage tank A 2 An emptying interface of the storage tank B;
the emptying interface of the unloading pump is connected with a second gas phase pipeline through a pipeline, and a pipeline between the unloading pump and the second gas phase pipeline is connected with a ninth ball valve in series;
and a first gas phase pipeline between the eighth ball valve and the tenth ball valve is connected with a third pressure transmitter through a third stop valve.
Liquid CO 2 Application method of loading and unloading vehicle integrated device, and liquid CO 2 Loading and unloading vehicle integrated device for loading and unloading liquid CO 2 Tank wagon is unloaded to liquid CO 2 Storage tank, or liquid CO 2 Unloading the storage tank to liquid CO 2 Tank wagon, or at least two liquid CO 2 And pouring the tank between the storage tanks.
Said liquid CO 2 Loading and unloading vehicle integrated device for loading and unloading liquid CO 2 Tank wagon is unloaded to liquid CO 2 The storage tank specifically includes:
all valves on the first liquid phase pipeline, the liquid inlet pipeline of the loading and unloading truck pump, the liquid outlet pipeline of the loading and unloading truck pump and the second liquid phase pipeline are opened, and the fourth ball valve, the fifth ball valve, the sixth ball valve and the seventh ball valve are closed;
liquid CO 2 Liquid CO in tank car 2 By CO 2 The liquid phase end of the tank wagon sequentially flows through a first liquid phase pipeline, a first ball valve, a second ball valve, a liquid inlet pipeline of a loading and unloading vehicle pump, the loading and unloading vehicle pump outlet pipeline, a third ball valve and a second liquid phase pipeline, and finally enters CO 2 And a storage tank A.
Said liquid CO 2 Loading and unloading vehicle integrated device for loading and unloading liquid CO 2 Unloading the storage tank to liquid CO 2 The tank wagon specifically includes:
opening all valves on the second liquid phase pipeline, the first branch pipeline, the liquid inlet pipeline of the loading and unloading truck pump, the liquid outlet pipeline of the loading and unloading truck pump, the second branch pipeline and the first liquid phase pipeline, and closing the second ball valve, the third ball valve, the sixth ball valve and the seventh ball valve;
CO 2 liquid CO in tank A 2 Flows through the second liquid phase pipeline, the first branch pipeline, the fourth ball valve, the liquid inlet pipeline of the loading and unloading pump, the liquid outlet pipeline of the loading and unloading pump, the second branch pipeline, the fifth ball valve, the first ball valve and the first liquid phase pipeline in sequence, and finally passes through CO 2 Liquid phase end of tank car enters liquid CO 2 And (5) a tank car.
Said bringing at least two liquid COs into contact 2 The tank is inverted between the storage tanks, if two liquid state COs are adopted 2 The pressure difference between the storage tanks is less than 1.0Mpa, and the step of pouring specifically comprises the following steps:
all valves on the second liquid phase pipeline, the branch pipeline I, the liquid inlet pipeline of the loading and unloading truck pump, the liquid outlet pipeline of the loading and unloading truck pump, the branch pipeline II and the third liquid phase pipeline are opened, and the first ball valve, the second ball valve and the third ball valve are closed;
CO 2 liquid CO in tank A 2 Sequentially flowing through a second liquid phase pipeline, a first branch pipeline, a fourth ball valve, a liquid inlet pipeline of a loading and unloading pump, a liquid outlet pipeline of the loading and unloading pump, a second branch pipeline, a sixth ball valve, a seventh ball valve and a third liquid phase pipeline, and finally entering CO 2 And a storage tank B.
Said bringing at least two liquid COs into contact 2 The tank is inverted between the storage tanks, if two liquid state COs are adopted 2 The pressure difference between the storage tanks is between 1.0Mpa and 2.5Mpa, and the step of pouring specifically comprises the following steps:
all valves on the second liquid phase pipeline, the branch pipeline II and the third liquid phase pipeline are opened, and the fourth ball valve, the loading and unloading vehicle pump, the second ball valve and the first ball valve are closed;
CO 2 high pressure liquid CO in tank A 2 Sequentially flowing through a second liquid phase pipeline, a third ball valve, a branch pipeline II, a fifth ball valve, a sixth ball valve, a seventh ball valve and a third liquid phase pipeline, and finally entering CO with small pressure 2 Storage tank B, CO 2 Storage tanks A and CO 2 The tank B is pressure balanced.
Liquid CO 2 The application method of the loading and unloading vehicle integrated device further comprises pipeline emptying, and specifically comprises the following steps:
when liquid CO is carried out 2 Tank wagon is unloaded to liquid CO 2 Storage tank, or liquid CO 2 Unloading the storage tank to liquid CO 2 Tank wagon, or at least two liquid CO 2 CO when the tank is inverted between the storage tanks 2 The gas phase at the gas phase end of the tank wagon sequentially enters a vent pipeline through a first gas phase pipeline, an eighth ball valve, a tenth ball valve and a branch pipeline for venting; simultaneously, the gas phase in the first liquid phase pipeline sequentially enters the emptying pipeline through a branch pipeline III and an eleventh ball valve for emptying; simultaneously, the gas phase in the loading and unloading vehicle pump enters a vent pipeline through a ninth ball valve to be vented; at the same time, CO 2 Gas phase and CO in storage tank A 2 The gas phase in the storage tank B jointly enters the second gas phase pipeline to be converged and then enters the emptying pipeline to be emptied.
The beneficial effects of the invention are as follows:
(1) The invention is used for liquid CO 2 Tank truck loading and unloading vehicle and liquid CO 2 The tank is inverted between the storage tanks, the liquid phase pipeline, the gas phase pipeline, the emptying pipeline, the loading and unloading truck pump and the like are designed, and the liquid phase pipeline, the gas phase pipeline, the emptying pipeline, the loading and unloading truck pump, the pressure transmitter and the like are integrated and skid-mounted, so that the whole unloading truck can be movedThe method has the advantages of repeated utilization, rapid installation, shortened construction period and better superiority.
(2) Liquid CO protected in the present invention 2 The loading and unloading truck integrated device can be mutually switched with another device under the accident state of the storage tanks and the loading and unloading truck pumps, and the exchange of the tank reversing and loading and unloading truck pumps between the storage tanks can achieve the safe operation of equipment and facilities.
(3) Liquid CO of the invention 2 The loading and unloading integrated device realizes the double-flow process technology of unloading the tank wagon to the storage tank, and pouring the tank between the storage tank and the tank wagon.
(4) In the invention, the pressure transmitters are arranged on the liquid-phase pipeline and the gas-phase pipeline, the pressure transmitters are timely emptied according to abnormal pressure, and the emptying pipeline is connected to the outside of the integrated device, thereby facilitating equipment overhaul and maintenance and simultaneously carrying out CO (carbon monoxide) treatment 2 Leakage is monitored, and personal safety is ensured.
(5) The invention can realize the same device to any liquid CO 2 Loading and unloading vehicle for storage tanks, or same CO 2 The storage tank is used for loading and unloading vehicles of different devices, so that reliable operation under abnormal conditions is realized.
In order to make the above-mentioned objects of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
FIG. 1 is a liquid CO 2 Tank wagon is unloaded to liquid CO 2 Schematic process flow diagram of the storage tank.
FIG. 2 is a liquid CO 2 Unloading the storage tank to liquid CO 2 Schematic process flow diagram of the tank car.
FIG. 3 is two liquid COs 2 And a process flow schematic diagram of tank inversion (the pressure difference is less than 1.0 Mpa) is carried out between the storage tanks.
FIG. 4 is two liquid COs 2 And a process flow diagram of tank inversion (the pressure difference is between 1.0Mpa and 2.5 Mpa) is carried out between the storage tanks.
FIG. 5 is liquid CO 2 And (3) a schematic diagram of a process flow of emptying the loading and unloading vehicle integrated device.
Reference numerals illustrate:
1. a first liquid phase line; 2. a first ball valve; 3. a first stop valve; 4. a first pressure transmitter; 5. a second ball valve; 6. a loading and unloading truck pump liquid inlet pipeline; 7. a truck pump; 8. the pump outlet pipeline of the loading and unloading truck; 9. a second shut-off valve; 10. a second pressure transmitter; 11. a third ball valve; 12. a second liquid phase line; 13. a fourth ball valve; 14. a fifth ball valve; 15. a sixth ball valve; 16. a seventh ball valve; 17. a third liquid phase line; 18. a first gas phase line; 19. an eighth ball valve; 20. a third stop valve; 21. a third pressure transmitter; 22. a ninth ball valve; 23. a second gas phase line; 24. a tenth ball valve; 25. an eleventh ball valve; 26. a vent line; 27. a sledge seat; CO 2. CO 2 A storage tank A; CO 2 A storage tank B; CO 2. CO 2 A tank car gas phase end; CO 2 The liquid phase end of the tank wagon; 32. a branch line I; 33. a branch line II; 32. a branch line I; 33. a branch line II; 34. a branch line III; 35. and a branch line IV.
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present invention with specific examples.
In the present invention, the upper, lower, left and right directions in the drawings are regarded as liquid CO as described in the present specification 2 The loading and unloading car is integrated with the upper, lower, left and right of the device.
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the examples described herein, which are provided to fully and completely disclose the present invention and fully convey the scope of the invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, like elements/components are referred to by like reference numerals.
Unless otherwise indicated, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. In addition, it will be understood that terms defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
In the following embodiments, liquid CO is described for clarity and conciseness 2 The structure and medium flow direction of the loading and unloading vehicle integrated device are shown in a split map and step by step, namely the pipeline design structure of a tank wagon to a storage tank (see fig. 1), the storage tank to the tank wagon (see fig. 2), the tank pouring between the storage tanks (see fig. 3 and 4) and the emptying process (fig. 5), wherein arrows in the drawing indicate the medium flow direction.
First embodiment
Referring to FIG. 1, the present embodiment discloses a liquid CO 2 The loading and unloading truck integrated device comprises a first liquid phase pipeline 1, wherein one end of the first liquid phase pipeline 1 is used for being connected with CO 2 Tank wagon liquid phase end 31, first ball valve 2 is connected to other end, first ball valve 2 passes through pipeline connection second ball valve 5, second ball valve 5 passes through lift truck pump feed liquor pipeline 6 to be connected in lift truck pump 7's import, lift truck pump 7's export passes through lift truck pump drain pipeline 8 to be connected third ball valve 11, third ball valve 11 is connected in the one end of second liquid phase pipeline 12, the other end of second liquid phase pipeline 12 is connected in CO 2 A tank a28;
the second liquid phase pipeline 12 is communicated with the liquid inlet pipeline 6 of the loading and unloading truck pump through a branch pipeline I32, and a fourth ball valve 13 is connected to the branch pipeline I32 in series; the pipeline between the first ball valve 2 and the second ball valve 5 is communicated with the discharge pipeline 8 of the pump of the loading and unloading vehicle through a branch pipeline II 33, and a fifth ball valve 14 is connected on the branch pipeline II 33 in series;
the liquid outlet pipeline 8 of the pump of the loading and unloading vehicle is connected with a second pressure transmitter 10 through a second stop valve 9; the pipeline between the first ball valve 2 and the second ball valve 5 is connected with a first pressure transmitter 4 through a first stop valve 3;
the first liquid phase pipeline 1, the first ball valve 2, the second ball valve 5, the loading and unloading pump liquid inlet pipeline 6, the unloading pump 7, the loading and unloading pump liquid outlet pipeline 8, the third ball valve 11, the second liquid phase pipeline 12, the branch pipeline I32 and the branch pipeline II 33 are all integrated and skid-mounted on the skid base 27.
The liquid CO provided by the embodiment 2 Loading and unloading car integrated device can realize two functions, namely (1) liquid CO 2 Tank wagon is unloaded to liquid CO 2 A storage tank; (2) CO in liquid state 2 Unloading the storage tank to liquid CO 2 And (5) a tank car. The method comprises the following steps:
(1) CO in liquid state 2 Tank wagon is unloaded to liquid CO 2 A storage tank, as shown in fig. 1, comprising the steps of:
all valves on the first liquid phase pipeline 1, the loading and unloading truck pump liquid inlet pipeline 6, the loading and unloading truck pump liquid outlet pipeline 8 and the second liquid phase pipeline 12 are opened, and the fourth ball valve 13, the fifth ball valve 14, the sixth ball valve 15 and the seventh ball valve 16 are closed;
liquid CO 2 Liquid CO in tank car 2 By CO 2 The liquid phase end 31 of the tank car sequentially flows through the first liquid phase pipeline 1, the first ball valve 2, the second ball valve 5, the liquid inlet pipeline 6 of the loading and unloading pump, the loading and unloading pump 7, the liquid outlet pipeline 8 of the loading and unloading pump, the third ball valve 11 and the second liquid phase pipeline 12, and finally enters the CO 2 Tank a28.
The first stop valve 3 and the second stop valve 9 function in the same manner, and are used to connect the first pressure transmitter 4 or the second pressure transmitter 10 to the medium (liquid CO) 2 ) Isolation and convenient maintenance; the first pressure transmitter 4 or the second pressure transmitter 10 is used for monitoring the pressure of the pipeline, and can also monitor CO 2 Leakage, so as to make overhaul and maintenance actions in time.
(2) CO in liquid state 2 Unloading the storage tank to liquid CO 2 A tank car, as shown in fig. 2, comprising the steps of:
all valves on the second liquid phase pipeline 12, the branch pipeline I32, the liquid inlet pipeline 6 of the truck pump, the liquid outlet pipeline 8 of the truck pump, the branch pipeline II 33 and the first liquid phase pipeline 1 are opened, and the second ball valve 5, the third ball valve 11, the sixth ball valve 15 and the seventh ball valve 16 are closed;
CO 2 liquid CO in tank A28 2 Sequentially flows through a second liquid phase pipeline 12, a branch pipeline I32, a fourth ball valve 13, a liquid inlet pipeline 6 of a loading and unloading pump, a loading and unloading pump 7, a liquid outlet pipeline 8 of the loading and unloading pump, a branch pipeline II 33, a fifth ball valve 14,A first ball valve 2 and a first liquid phase pipeline 1, finally pass through CO 2 Tank car liquid phase end 31 enters liquid CO 2 And (5) a tank car.
The liquid CO is realized by the integrated device 2 Tank wagon is unloaded to liquid CO 2 Storage tank, liquid CO 2 Unloading the storage tank to liquid CO 2 The tank wagon realizes the functions of tank wagon to storage tank, storage tank to tank wagon, monitoring unloading pump pressure and liquid phase pipeline pressure.
In this embodiment, all the pipelines are skid-mounted on the skid base 27, so that the whole transportation can be realized, and the recycling can be realized.
Second embodiment
In addition to the first embodiment, the third liquid phase pipeline 17 is further installed on the skid base 27 of the present embodiment, one end of the third liquid phase pipeline 17 is connected to the branch pipeline two 33, and the other end is connected to the CO outside the skid base 27 2 The storage tank B29 is connected with a sixth ball valve 15 and a seventh ball valve 16 in series on the third liquid phase pipeline 17, and the sixth ball valve 15 is close to the fifth ball valve 14.
Unlike the first embodiment, this embodiment can realize not only liquid CO 2 Tank wagon is unloaded to liquid CO 2 Storage tank, liquid CO 2 Unloading the storage tank to liquid CO 2 Tank car, two liquid state COs can be realized at the same time 2 Tank inversion between tanks, see FIG. 3, if two liquid COs 2 The pressure difference between the storage tanks is less than 1.0Mpa, and the step of pouring specifically comprises the following steps:
all valves on the second liquid phase pipeline 12, the branch pipeline I32, the liquid inlet pipeline 6 of the truck pump, the liquid outlet pipeline 8 of the truck pump, the branch pipeline II 33 and the third liquid phase pipeline 17 are opened, and the first ball valve 2, the second ball valve 5 and the third ball valve 11 are closed;
CO 2 liquid CO in tank A28 2 Flows through the second liquid phase pipeline 12, the branch pipeline I32, the fourth ball valve 13, the liquid inlet pipeline 6 of the loading and unloading pump, the loading and unloading pump 7, the liquid outlet pipeline 8 of the loading and unloading pump, the branch pipeline II 33, the sixth ball valve 15 and the seventh ball valve in sequence16. A third liquid phase line 17, finally into the CO 2 And a tank B29.
Referring to FIG. 4, if two liquid COs 2 The pressure difference between the storage tanks is between 1.0Mpa and 2.5Mpa, and the step of pouring specifically comprises the following steps:
all valves on the second liquid phase pipeline 12, the branch pipeline II 33 and the third liquid phase pipeline 17 are opened, and the fourth ball valve 13, the loading and unloading vehicle pump 7, the second ball valve 5 and the first ball valve 2 are closed;
CO 2 high pressure liquid CO in tank A28 2 Flows through the second liquid phase pipeline 12, the third ball valve 11, the branch pipeline two 33, the fifth ball valve 14, the sixth ball valve 15, the seventh ball valve 16 and the third liquid phase pipeline 17 in sequence, and finally enters CO with small pressure 2 Storage tank B29, CO 2 Storage tanks A28 and CO 2 Tank B29 is pressure balanced.
Liquid CO protected by the embodiment 2 The loading and unloading integrated device realizes a double-flow process of unloading the tank wagon to the storage tank, unloading the tank wagon to the tank wagon and unloading the tank wagon, and can be mutually switched with another device under the accident state of the tank wagon pump, and the tank wagon pump and the loading and unloading wagon pump between the storage tanks can be exchanged, so that the safe operation of equipment and facilities is realized.
Third embodiment
On the basis of the second embodiment, liquid CO 2 The loading and unloading vehicle integrated device further comprises a blow-down pipeline 26 which is skid-mounted on the skid base 27, one end of the blow-down pipeline 26 extends out of the skid base 27 to blow down, the other end of the blow-down pipeline 26 is connected with two pipelines, namely a branch pipeline III 34 and a branch pipeline IV 35, the branch pipeline III 34 is connected with a pipeline between the first ball valve 2 and the second ball valve 5 through an eleventh ball valve 25, the branch pipeline IV 35 is connected with a tenth ball valve 24 in series, the end part of the branch pipeline IV 35, which is far away from the blow-down pipeline 26, is connected with two gas-phase pipelines, namely a first gas-phase pipeline 18 and a second gas-phase pipeline 23, the first gas-phase pipeline 18 is connected with CO through an eighth ball valve 19 2 The gas phase end 30 of the tank car, the end of the second gas phase pipeline 23 far away from the branch pipeline IV 35 is connected with CO 2 Venting interface and CO of storage tank A28 2 A vent interface of the storage tank B29;
the emptying interface of the unloading pump 7 is connected with a second gas phase pipeline 23 through a pipeline, and a pipeline between the unloading pump 7 and the second gas phase pipeline 23 is connected with a ninth ball valve 22 in series;
a third pressure transmitter 21 is connected to the first gas phase line 18 between the eighth ball valve 19 and the tenth ball valve 24 via a third shut-off valve 20.
Specifically, as shown in fig. 5, the process of emptying is as follows: when liquid CO is carried out 2 Tank wagon is unloaded to liquid CO 2 Storage tank, or liquid CO 2 Unloading the storage tank to liquid CO 2 Tank wagon, or at least two liquid CO 2 CO when the tank is inverted between the storage tanks 2 The gas phase of the gas phase end 30 of the tank wagon sequentially enters the emptying pipeline 26 through the first gas phase pipeline 18, the eighth ball valve 19, the tenth ball valve 24 and the branch pipeline IV 35 for emptying; simultaneously, the gas phase in the first liquid phase pipeline 1 sequentially enters the emptying pipeline 26 through a branch pipeline III 34 and an eleventh ball valve 25 for emptying; simultaneously, the gas phase in the loading and unloading vehicle pump 7 enters the emptying pipeline 26 through the ninth ball valve 22 for emptying; at the same time, CO 2 Gas phase and CO in tank A28 2 The gas phase in the storage tank B29 jointly enters the second gas phase pipeline 23 to be converged and then enters the emptying pipeline 26 for emptying.
The third pressure transmitter 21 is used for monitoring gas phase pressure, and can be timely emptied according to abnormal pressure, and the emptying pipeline 26 is connected to the outside of the integrated device, so that equipment overhaul and maintenance are convenient, and meanwhile, CO is also subjected to operation safety 2 Leakage is monitored, and personal safety is ensured.
Fourth embodiment
The embodiment protects a liquid CO 2 Application method of loading and unloading vehicle integrated device and liquid CO 2 Loading and unloading vehicle integrated device for loading and unloading liquid CO 2 Tank wagon is unloaded to liquid CO 2 Storage tank, or liquid CO 2 Unloading the storage tank to liquid CO 2 Tank wagon, or at least two liquid CO 2 And pouring the tank between the storage tanks.
Specifically, referring to FIG. 1, liquid CO 2 Loading and unloading vehicle integrated device for loading and unloading liquid CO 2 Unloading the tank car toLiquid CO 2 The storage tank specifically includes:
all valves on the first liquid phase pipeline 1, the loading and unloading truck pump liquid inlet pipeline 6, the loading and unloading truck pump liquid outlet pipeline 8 and the second liquid phase pipeline 12 are opened, and the fourth ball valve 13, the fifth ball valve 14, the sixth ball valve 15 and the seventh ball valve 16 are closed;
liquid CO 2 Liquid CO in tank car 2 By CO 2 The liquid phase end 31 of the tank car sequentially flows through the first liquid phase pipeline 1, the first ball valve 2, the second ball valve 5, the liquid inlet pipeline 6 of the loading and unloading pump, the loading and unloading pump 7, the liquid outlet pipeline 8 of the loading and unloading pump, the third ball valve 11 and the second liquid phase pipeline 12, and finally enters the CO 2 Tank a28.
As shown in fig. 2, liquid CO 2 Loading and unloading vehicle integrated device for loading and unloading liquid CO 2 Unloading the storage tank to liquid CO 2 The tank wagon specifically includes:
all valves on the second liquid phase pipeline 12, the branch pipeline I32, the liquid inlet pipeline 6 of the truck pump, the liquid outlet pipeline 8 of the truck pump, the branch pipeline II 33 and the first liquid phase pipeline 1 are opened, and the second ball valve 5, the third ball valve 11, the sixth ball valve 15 and the seventh ball valve 16 are closed;
CO 2 liquid CO in tank A28 2 Flows through the second liquid phase pipeline 12, the branch pipeline I32, the fourth ball valve 13, the liquid inlet pipeline 6 of the loading and unloading pump, the loading and unloading pump 7, the liquid outlet pipeline 8 of the loading and unloading pump, the branch pipeline II 33, the fifth ball valve 14, the first ball valve 2 and the first liquid phase pipeline 1 in sequence, and finally passes through CO 2 Tank car liquid phase end 31 enters liquid CO 2 And (5) a tank car.
As shown in fig. 3, at least two liquid CO's are added 2 The tank is inverted between the storage tanks, if two liquid state COs are adopted 2 The pressure difference between the storage tanks is less than 1.0Mpa, and the step of pouring specifically comprises the following steps:
all valves on the second liquid phase pipeline 12, the branch pipeline I32, the liquid inlet pipeline 6 of the truck pump, the liquid outlet pipeline 8 of the truck pump, the branch pipeline II 33 and the third liquid phase pipeline 17 are opened, and the first ball valve 2, the second ball valve 5 and the third ball valve 11 are closed;
CO 2 liquid CO in tank A28 2 Flows through the second liquid phase pipeline 1 in turn2. Branch line one 32, fourth ball valve 13, truck pump liquid inlet pipeline 6, truck pump 7, truck pump liquid outlet pipeline 8, branch line two 33, sixth ball valve 15, seventh ball valve 16, third liquid phase pipeline 17, and finally enter CO 2 And a tank B29.
Referring to fig. 4, at least two liquid CO's are added 2 The tank is inverted between the storage tanks, if two liquid state COs are adopted 2 The pressure difference between the storage tanks is between 1.0Mpa and 2.5Mpa, and the step of pouring specifically comprises the following steps:
all valves on the second liquid phase pipeline 12, the branch pipeline II 33 and the third liquid phase pipeline 17 are opened, and the fourth ball valve 13, the loading and unloading vehicle pump 7, the second ball valve 5 and the first ball valve 2 are closed;
CO 2 high pressure liquid CO in tank A28 2 Flows through the second liquid phase pipeline 12, the third ball valve 11, the branch pipeline two 33, the fifth ball valve 14, the sixth ball valve 15, the seventh ball valve 16 and the third liquid phase pipeline 17 in sequence, and finally enters CO with small pressure 2 Storage tank B29, CO 2 Storage tanks A28 and CO 2 Tank B29 is pressure balanced.
Referring to FIG. 5, liquid CO 2 The application method of the loading and unloading vehicle integrated device further comprises pipeline emptying, and specifically comprises the following steps:
when liquid CO is carried out 2 Tank wagon is unloaded to liquid CO 2 Storage tank, or liquid CO 2 Unloading the storage tank to liquid CO 2 Tank wagon, or at least two liquid CO 2 CO when the tank is inverted between the storage tanks 2 The gas phase of the gas phase end 30 of the tank wagon sequentially enters the emptying pipeline 26 through the first gas phase pipeline 18, the eighth ball valve 19, the tenth ball valve 24 and the branch pipeline IV 35 for emptying; simultaneously, the gas phase in the first liquid phase pipeline 1 sequentially enters the emptying pipeline 26 through a branch pipeline III 34 and an eleventh ball valve 25 for emptying; simultaneously, the gas phase in the loading and unloading vehicle pump 7 enters the emptying pipeline 26 through the ninth ball valve 22 for emptying; at the same time, CO 2 Gas phase and CO in tank A28 2 The gas phase in the storage tank B29 jointly enters the second gas phase pipeline 23 to be converged and then enters the emptying pipeline 26 for emptying.
The liquid CO protected by the invention 2 Loading and unloading vehicle integrated assemblyThe device can simultaneously realize tank wagon to storage tank (see figure 1), storage tank to tank wagon (see figure 2), tank pouring between storage tank and storage tank (see figures 3 and 4) and emptying process, that is to say, the integrated device can be used as a loading and unloading device between tank wagon and storage tank and between storage tank and as a loading and unloading tool, not only can be integrally moved, but also can be recycled, and the problems that transfer pipelines cannot be integrally moved, the workload of disassembly is large and the investment of engineering is large at present are solved.
In summary, the liquid CO protected by the invention 2 The loading and unloading vehicle integrated device and the application method thereof can realize integral moving, repeated utilization and quick installation, shorten the construction period, reduce the occupied area and reduce the engineering investment. In particular, the invention can be mutually switched with another device under the accident state of the storage tank and the loading and unloading vehicle pump, and the exchange of the tank reversing and loading and unloading vehicle pump between the storage tanks can achieve the safe operation of equipment and facilities.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples of carrying out the invention and that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims (6)

1. Liquid CO 2 Application method of loading and unloading vehicle integrated device is characterized in that the application method of the loading and unloading vehicle integrated device is characterized in that liquid CO 2 Loading and unloading vehicle integrated device for loading and unloading liquid CO 2 Tank wagon is unloaded to liquid CO 2 Storage tank, or liquid CO 2 Unloading the storage tank to liquid CO 2 Tank cars, or two liquid COs 2 Tank inversion is carried out between the storage tanks, and two liquid state COs 2 The storage tanks are respectively CO 2 Storage tank A (28) and CO 2 A tank B (29);
liquid CO 2 The loading and unloading vehicle integrated device comprises a first liquid phase pipeline (1), wherein one end of the first liquid phase pipeline (1) is used for being connected with CO 2 Tank wagon liquid phase end (31), first ball valve (2) are connected to other end, first ball valve (2) are through pipe connection second ball valve (5), second ball valve (5) are connected in the advance of loading and unloading car pump (7) through loading and unloading car pump feed liquor pipeline (6)The outlet of the loading and unloading vehicle pump (7) is connected with a third ball valve (11) through a loading and unloading vehicle pump outlet pipeline (8), the third ball valve (11) is connected with one end of a second liquid phase pipeline (12), and the other end of the second liquid phase pipeline (12) is connected with CO 2 A tank A (28);
the second liquid phase pipeline (12) is communicated with the liquid inlet pipeline (6) of the loading and unloading truck pump through a branch pipeline I (32), and a fourth ball valve (13) is connected to the branch pipeline I (32) in series; the pipeline between the first ball valve (2) and the second ball valve (5) is communicated with the pump outlet pipeline (8) of the loading and unloading vehicle through a branch pipeline II (33), and a fifth ball valve (14) is connected to the branch pipeline II (33) in series;
the pump outlet pipeline (8) of the loading and unloading vehicle is connected with a second pressure transmitter (10) through a second stop valve (9); the pipeline between the first ball valve (2) and the second ball valve (5) is connected with a first pressure transmitter (4) through a first stop valve (3);
the first liquid phase pipeline (1), the first ball valve (2), the second ball valve (5), the loading and unloading pump liquid inlet pipeline (6), the unloading pump (7), the loading and unloading pump liquid outlet pipeline (8), the third ball valve (11), the second liquid phase pipeline (12), the branch pipeline I (32) and the branch pipeline II (33) are all integrated and skid-mounted on the skid base (27);
the skid base (27) is also skid-mounted with a third liquid phase pipeline (17), one end of the third liquid phase pipeline (17) is connected with a branch pipeline II (33), and the other end is connected with CO outside the skid base (27) 2 A storage tank B (29), wherein a sixth ball valve (15) and a seventh ball valve (16) are connected in series on the third liquid phase pipeline (17), and the sixth ball valve (15) is close to the fifth ball valve (14);
liquid CO 2 The loading and unloading vehicle integrated device further comprises a blow-down pipeline (26) which is skid-mounted on the skid base (27), one end of the blow-down pipeline (26) extends out of the skid base (27) to blow down, the other end of the blow-down pipeline is connected with two pipelines, namely a branch pipeline III (34) and a branch pipeline IV (35), the branch pipeline III (34) is communicated with a pipeline between the first ball valve (2) and the second ball valve (5) through an eleventh ball valve (25), the tenth ball valve (24) is connected on the branch pipeline IV (35) in series, and the end part of the branch pipeline IV (35) away from the blow-down pipeline (26) is connected with two gas-phase pipelines, namely a first gas-phase pipeline (18) and a second gas-phase pipeline respectivelyA two-gas-phase line (23), the first gas-phase line (18) being connected to the CO by an eighth ball valve (19) 2 The gas phase end (30) of the tank car, one end of the second gas phase pipeline (23) far away from the branch pipeline IV (35) is connected with CO 2 Venting interface and CO for tank A (28) 2 A vent interface of the storage tank B (29);
the emptying interface of the unloading pump (7) is communicated with a second gas-phase pipeline (23) through a pipeline, and a ninth ball valve (22) is connected in series on the pipeline between the unloading pump (7) and the second gas-phase pipeline (23);
the first gas phase pipeline (18) between the eighth ball valve (19) and the tenth ball valve (24) is connected with a third pressure transmitter (21) through a third stop valve (20).
2. Liquid CO according to claim 1 2 Application method of loading and unloading vehicle integrated device is characterized in that the liquid CO 2 Loading and unloading vehicle integrated device for loading and unloading liquid CO 2 Tank wagon is unloaded to liquid CO 2 The storage tank specifically includes:
all valves on the first liquid phase pipeline (1), the loading and unloading truck pump liquid inlet pipeline (6), the loading and unloading truck pump liquid outlet pipeline (8) and the second liquid phase pipeline (12) are opened, and the fourth ball valve (13), the fifth ball valve (14), the sixth ball valve (15) and the seventh ball valve (16) are closed;
liquid CO 2 Liquid CO in tank car 2 By CO 2 The liquid phase end (31) of the tank car sequentially flows through a first liquid phase pipeline (1), a first ball valve (2), a second ball valve (5), a liquid inlet pipeline (6) of a loading and unloading pump, a loading and unloading pump (7), a liquid outlet pipeline (8) of the loading and unloading pump, a third ball valve (11) and a second liquid phase pipeline (12), and finally enters CO 2 A storage tank A (28).
3. Liquid CO according to claim 1 2 Application method of loading and unloading vehicle integrated device is characterized in that the liquid CO 2 Loading and unloading vehicle integrated device for loading and unloading liquid CO 2 Unloading the storage tank to liquid CO 2 The tank wagon specifically includes:
all valves on the second liquid phase pipeline (12), the branch pipeline I (32), the truck pump liquid inlet pipeline (6), the truck pump liquid outlet pipeline (8), the branch pipeline II (33) and the first liquid phase pipeline (1) are opened, and the second ball valve (5), the third ball valve (11), the sixth ball valve (15) and the seventh ball valve (16) are closed;
CO 2 liquid CO in tank A (28) 2 Flows through the second liquid phase pipeline (12), the branch pipeline I (32), the fourth ball valve (13), the loading and unloading pump liquid inlet pipeline (6), the loading and unloading pump (7), the loading and unloading pump liquid outlet pipeline (8), the branch pipeline II (33), the fifth ball valve (14), the first ball valve (2) and the first liquid phase pipeline (1) in sequence, and finally passes through CO 2 The liquid phase end (31) of the tank car enters liquid CO 2 And (5) a tank car.
4. Liquid CO according to claim 1 2 Application method of loading and unloading vehicle integrated device, characterized in that at least two liquid state COs are used 2 The tank is inverted between the storage tanks, if two liquid state COs are adopted 2 The pressure difference between the storage tanks is less than 1.0Mpa, and the step of pouring specifically comprises the following steps:
all valves on the second liquid phase pipeline (12), the branch pipeline I (32), the loading and unloading truck pump liquid inlet pipeline (6), the loading and unloading truck pump liquid outlet pipeline (8), the branch pipeline II (33) and the third liquid phase pipeline (17) are opened, and the first ball valve (2), the second ball valve (5) and the third ball valve (11) are closed;
CO 2 liquid CO in tank A (28) 2 Flows through the second liquid phase pipeline (12), the branch pipeline I (32), the fourth ball valve (13), the loading and unloading pump liquid inlet pipeline (6), the loading and unloading pump (7), the loading and unloading pump liquid outlet pipeline (8), the branch pipeline II (33), the sixth ball valve (15), the seventh ball valve (16) and the third liquid phase pipeline (17) in sequence, and finally enters CO 2 And a tank B (29).
5. Liquid CO according to claim 1 2 Application method of loading and unloading vehicle integrated device, characterized in that at least two liquid state COs are used 2 The tank is inverted between the storage tanks, if two liquid state COs are adopted 2 The pressure difference between the storage tanks is between 1.0Mpa and 2.5Mpa, and the step of pouring specifically comprises the following steps:
all valves on the second liquid phase pipeline (12), the branch pipeline II (33) and the third liquid phase pipeline (17) are opened, and the fourth ball valve (13), the truck pump (7), the second ball valve (5) and the first ball valve (2) are closed;
CO 2 high pressure liquid CO in tank A (28) 2 Flows through the second liquid phase pipeline (12), the third ball valve (11), the branch pipeline II (33), the fifth ball valve (14), the sixth ball valve (15), the seventh ball valve (16) and the third liquid phase pipeline (17) in sequence, and finally enters CO with small pressure 2 Storage tank B (29), CO 2 Storage tank A (28) and CO 2 Tank B (29) pressure balances.
6. Liquid CO according to any one of claims 2 to 5 2 The application method of the loading and unloading vehicle integrated device is characterized by further comprising pipeline emptying, and specifically comprises the following steps:
when liquid CO is carried out 2 Tank wagon is unloaded to liquid CO 2 Storage tank, or liquid CO 2 Unloading the storage tank to liquid CO 2 Tank wagon, or at least two liquid CO 2 CO when the tank is inverted between the storage tanks 2 The gas phase of the gas phase end (30) of the tank wagon sequentially passes through a first gas phase pipeline (18), an eighth ball valve (19), a tenth ball valve (24) and a branch pipeline four (35) to enter a vent pipeline (26) for venting; simultaneously, the gas phase in the first liquid phase pipeline (1) sequentially enters the emptying pipeline (26) through a branch pipeline III (34) and an eleventh ball valve (25) for emptying; simultaneously, the gas phase in the loading and unloading vehicle pump (7) enters an emptying pipeline (26) through a ninth ball valve (22) for emptying; at the same time, CO 2 Gas phase and CO in tank A (28) 2 The gas phase in the storage tank B (29) jointly enters the second gas phase pipeline (23) to be converged and then enters the emptying pipeline (26) to be emptied.
CN201910696137.8A 2019-07-30 2019-07-30 Liquid CO 2 Loading and unloading vehicle integrated device and application method thereof Active CN110296322B (en)

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CN114427660B (en) * 2022-01-05 2024-06-04 国家石油天然气管网集团有限公司 Integrated automatic leveling and automatic emptying system and method for station yard

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