Automatic switchable CNG filling device

Abstract

The utility model discloses an automatic switchable CNG (compressed natural gas) filling device which comprises a liquid feeding pump, a pressure injection pump, a carbon dioxide storage tank and a generator, and the generator supplies power to the liquid feeding pump, the pressure injection pump and an electric heater. And the liquid feeding pump, the pressure injection pump and the generator are vehicle-mounted pries. Due to the fact that the liquid feeding pump, the pressure injection pump and the generator are vehicle-mounted pries, only one pressure injection vehicle-mounted device is needed to meet the requirement of carbon dioxide huff and puff operation hardware, additional transportation and hoisting operation is not needed, convenience, high efficiency, safety and reliability are achieved, and the operation cost of carbon dioxide huff and puff is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a carbon dioxide injection device, more exactly, it is an automatic switchable CNG filling device. BACKGROUND

[0002] Liquid carbon dioxide injection device and electric heating are two sets of equipment, liquid carbon dioxide needs to be equipped with additional electric heating device to carry out temperature rise because of too low temperature (-20 DEG), resulting in additional transportation, hoisting and installation of electric box cable, it is more troublesome and increases carbon dioxide throughput operation cost. CONTENT OF THE UTILITY MODEL

[0003] Therefore, it is necessary to provide an automatic switchable CNG filling device aiming at the above technical problems.

[0004] In order to solve the above technical problems, the utility model adopts the technical scheme as follows:

[0005] An automatic switchable CNG filling device, characterized in that the automatic switchable CNG filling device comprises a liquid feeding pump, a pressure injection pump and a carbon dioxide storage tank,

[0006] The liquid feeding pump comprises a first liquid feeding pump interface and a second liquid feeding pump interface, and the pressure injection pump comprises a first pressure injection pump interface, a second pressure injection pump interface and a third pressure injection pump interface,

[0007] The first liquid feeding pump interface is connected with the carbon dioxide storage tank through a liquid feeding pump inlet pipe, the second liquid feeding pump interface is connected with the carbon dioxide storage tank through a gas phase balance pipe, the second liquid feeding pump interface is connected with the first pressure injection pump interface through a liquid feeding pump outlet pipe, and a liquid feeding bypass pipe is arranged between the first liquid feeding pump interface and the second liquid feeding pump interface,

[0008] The second pressure injection pump interface is connected with a flow meter through a pressure injection pump outlet pipe, the outlet of the flow meter is provided with a de-pressurized injection well output pipe, the outside of the pressure injection pump outlet pipe is provided with an electric heater, and the third pressure injection pump interface is connected with the carbon dioxide storage tank through a liquid feeding pump backflow pipe

[0009] As a preferable embodiment of the utility model, the automatic switchable CNG filling device further comprises a generator, and the generator supplies power to the liquid feeding pump, the pressure injection pump and the electric heater.

[0010] As a preferable embodiment of the utility model, the liquid feeding pump, the pressure injection pump and the generator are arranged as a vehicle-mounted pry.

[0011] As a preferred embodiment of the present application, the carbon dioxide storage tank is provided with a vehicle charging gas phase pipe, a vehicle charging liquid phase pipe, a pressure gauge, a differential pressure transmitter and a safety valve.

[0012] Compared with the prior art, the present application has the following beneficial effects:

[0013] The present application provides an automatic switchable CNG filling device, since the liquid feeding pump and the generator are vehicle-mounted pry, only one pressure injection vehicle-mounted device can meet the hardware requirements of carbon dioxide throughput operation, without additional transportation and hoisting operation, which is convenient, efficient, safe and reliable, and effectively reduces the operation cost of carbon dioxide throughput. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the scheme in the present application, the following will briefly introduce the drawings needed in the embodiment description, and obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0015] Figure 1 The present application provides an automatic switchable CNG filling device, since the liquid feeding pump and the generator are vehicle-mounted pry, only one pressure injection vehicle-mounted device can meet the hardware requirements of carbon dioxide throughput operation, without additional transportation and hoisting operation, which is convenient, efficient, safe and reliable, and effectively reduces the operation cost of carbon dioxide throughput.

[0016] The mark in the figure is as follows: 1, vehicle charging gas phase pipe; 10, pressure injection well output pipe; 11, pressure gauge; 12, safety valve; 2, vehicle charging liquid phase pipe; 3, liquid feeding pump liquid inlet pipe; 4, liquid feeding pump liquid outlet pipe; 5, liquid feeding bypass pipe; 6, gas phase balance pipe; 7, pressure injection pump liquid outlet pipe; 8, liquid feeding pump backflow pipe; 9, differential pressure transmitter; S1, liquid feeding pump; S11, first liquid feeding pump interface; S12, second liquid feeding pump interface; S2, pressure injection pump; S21, first pressure injection pump interface; S22, second pressure injection pump interface; S23, third pressure injection pump interface; S3, carbon dioxide storage tank; S4, flow meter; S5, electric heater. DETAILED DESCRIPTION

[0017] In order to make those skilled in the art better understand the present application, the following will combine the drawings in the embodiment of the present application to clearly and completely describe the technical scheme in the embodiment of the present application.

[0018] As Figure 1 shown, the automatic switchable CNG filling device comprises a liquid feeding pump S1, a pressure injection pump S2 and a carbon dioxide storage tank S3.

[0019] The liquid feeding pump S1 comprises a first liquid feeding pump interface S11 and a second liquid feeding pump interface S12, the pressure injection pump S2 comprises a first pressure injection pump interface S21, a second pressure injection pump interface S22 and a third pressure injection pump interface S23,

[0020] The first liquid feeding pump interface S11 is connected with the carbon dioxide storage tank S3 through the liquid feeding pump inlet pipe 3, the second liquid feeding pump interface S12 is connected with the carbon dioxide storage tank S3 through the gas phase balance pipe 6, the second liquid feeding pump interface S12 is connected with the first pressure injection pump interface S21 through the liquid feeding pump outlet pipe 4, and the liquid feeding bypass pipe 5 is arranged between the first liquid feeding pump interface S11 and the second liquid feeding pump interface S12,

[0021] The second pressure injection pump interface S22 is connected with the flow meter S4 through the pressure injection pump outlet pipe 7, the outlet of the flow meter S4 is provided with the pressure injection well output pipe 10, the outside of the pressure injection pump outlet pipe 7 is provided with the electric heater S5, and the third pressure injection pump interface S23 is connected with the carbon dioxide storage tank S3 through the liquid feeding pump return pipe 8

[0022] The automatic switchable CNG filling device further comprises a generator (not shown in the figure), which supplies power to the liquid feeding pump S1, the pressure injection pump S2 and the electric heater S5.

[0023] The liquid feeding pump S1, the pressure injection pump S2 and the generator are arranged as a vehicle-mounted pry.

[0024] The carbon dioxide storage tank S3 is provided with a vehicle filling gas phase pipe 1, a vehicle filling liquid phase pipe 2, a pressure gauge 11, a differential pressure transmitter 9 and a safety valve 12.

[0025] The working mode of the automatic switchable CNG filling device will be described below.

[0026] The carbon dioxide in the carbon dioxide storage tank S3 enters the liquid feeding pump S1 through the liquid feeding pump inlet pipe 3, is pressurized to about 2.4 MPa, then enters the pressure injection pump S2 through the liquid feeding pump outlet pipe 4, is heated by the electric heater S5, and finally is injected into the wellbore through the pressure injection well output pipe 10

[0027] Since the liquid feeding pump S1, the pressure injection pump S2 and the generator are arranged as a vehicle-mounted pry, only one pressure injection vehicle-mounted device is needed to meet the hardware requirements of carbon dioxide huff and puff operation, without additional transportation and hoisting operation, which is convenient, efficient, safe and reliable, and effectively reduces the operation cost of carbon dioxide huff and puff.

[0028] Obviously, the above-described embodiments are only part of the embodiments of the present application, not all the embodiments, and the preferred embodiments of the present application are given in the drawings, but do not limit the patent scope of the present application.

Claims

1. An automated switchable CNG filling installation, characterized in that, The automatic switchable CNG filling device comprises a liquid feeding pump (S1), a pressure injection pump (S2) and a carbon dioxide storage tank (S3), The liquid feeding pump (S1) comprises a first liquid feeding pump interface (S11) and a second liquid feeding pump interface (S12), and the pressure injection pump (S2) comprises a first pressure injection pump interface (S21), a second pressure injection pump interface (S22) and a third pressure injection pump interface (S23), The first liquid feeding pump interface (S11) is connected with the carbon dioxide storage tank (S3) through a liquid feeding pump liquid inlet pipe (3), the second liquid feeding pump interface (S12) is connected with the carbon dioxide storage tank (S3) through a gas phase balance pipe (6), the second liquid feeding pump interface (S12) is connected with the first pressure injection pump interface (S21) through a liquid feeding pump liquid outlet pipe (4), and a liquid feeding bypass pipe (5) is arranged between the first liquid feeding pump interface (S11) and the second liquid feeding pump interface (S12), The second pressure injection pump interface (S22) is connected with a flow meter (S4) through a pressure injection pump liquid outlet pipe (7), an outlet of the flow meter (S4) is provided with a pressure injection well output pipe (10), an external portion of the pressure injection pump liquid outlet pipe (7) is provided with an electric heater (S5), and the third pressure injection pump interface (S23) is connected with the carbon dioxide storage tank (S3) through a liquid feeding pump backflow pipe (8).

2. An automated switchable CNG filling apparatus according to claim 1, characterised in that, The automatic switchable CNG filling device further comprises a generator, and the generator supplies power to the liquid feeding pump (S1), the pressure injection pump (S2) and the electric heater (S5).

3. An automated switchable CNG filling apparatus according to claim 2, characterised in that, The liquid feeding pump (S1), the pressure injection pump (S2) and the generator are arranged as a vehicle-mounted pry.

4. The automated switchable CNG filling apparatus of claim 1, wherein, The carbon dioxide storage tank (S3) is provided with a vehicle charging gas phase pipe (1), a vehicle charging liquid phase pipe (2), a pressure gauge (11), a differential pressure transmitter (9) and a safety valve (12).

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