Natural gas self-heating depressurization device capable of realizing refined monitoring

Abstract

The utility model relates to the technical field of self-heating depressurization of gas pipelines, in particular to a natural gas self-heating depressurization device capable of achieving refined monitoring. The natural gas self-heating pressure reduction device capable of achieving fine monitoring comprises a tube shell, an electric heating device, a generator and an airflow rotation driving device, the electric heating device, the generator and the airflow rotation driving device are respectively installed in the tube shell, the airflow rotation driving device is connected with a rotor shaft of the generator, and the generator is connected with the electric heating device through a wire. The natural gas conveying device has the advantages of being simple and reasonable in structural design, and achieving the purposes of natural gas conveying pressure reduction and natural gas temperature rise by fully utilizing natural gas conveying energy conversion.

Description

Technical Field

[0001] The utility model relates to the technical field of self-heating and pressure reduction of gas transmission pipelines, and in particular to a natural gas self-heating and pressure reduction device capable of realizing refined monitoring. Background Art

[0002] Natural gas is a high-density, high-energy, flammable and explosive gas that needs to be transported to various places through pipelines for use. Natural gas needs to be transported over long distances from gas wells to users. Due to geographical restrictions, gas pressure loss will occur during pipeline transportation, reducing the transportation distance and efficiency. Therefore, it is necessary to set up a booster station on the gas pipeline to pressurize the natural gas for transportation, increase pipeline pressure and transportation distance.

[0003] When transporting to important hub stations or distribution stations, the gas pressure matching in the station and the demand pressure at the gas user end must be considered, and the natural gas must be depressurized in the station. At the same time, according to the relationship between the pressure drop and temperature drop of natural gas, the temperature of the natural gas after pressure regulation will also decrease, and the natural gas must be heated in the station. The common process in the station is that the natural gas enters the station, is filtered, metered, pressure regulated, and heated, and then transported to downstream users. This process has the following shortcomings: 1. The process of natural gas pressure regulation wastes pressure energy; 2. The heating process requires additional heat energy consumption; 3. Pressure control and temperature control are respectively set on the pressure regulating and heating equipment, which is not convenient for on-site operators to observe and control.

[0004] In view of this, we proposed a natural gas self-heating and pressure reduction device that can achieve refined monitoring to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a natural gas self-heating pressure reduction device which can realize refined monitoring, and effectively overcome the defects of the prior art.

[0006] The technical solution of the utility model to solve the above technical problems is as follows:

[0007] A natural gas self-heating and pressure-reducing device capable of realizing refined monitoring comprises a tube shell and an electric heating device, a generator and an airflow rotation driving device respectively installed in the tube shell, wherein the airflow rotation driving device is connected to the rotor shaft of the generator, and the generator is connected to the electric heating device via a wire.

[0008] On the basis of the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, connecting flanges are respectively provided at both ends of the tube shell.

[0010] Furthermore, the airflow rotation driving device comprises an impeller, and a rotation center line of the impeller is perpendicular to a center line of the tube shell.

[0011] Furthermore, the above-mentioned airflow rotation driving devices and generators are provided in multiple groups corresponding to each other.

[0012] Furthermore, the electric heating device comprises an insulated heat pipe and a heating resistor. The heating resistor is spirally arranged in the heat pipe and connected to the generator via a wire. The heat pipe is filled with insulating powder filler.

[0013] Furthermore, the insulating powder filler is magnesium oxide powder filler.

[0014] Furthermore, the heat conducting tube is a ceramic tube.

[0015] Furthermore, one end of the tube shell is an air inlet end, and the other end is an air outlet end, and the airflow rotation driving device is arranged at a position close to the air inlet end.

[0016] Furthermore, a first pressure sensor and a temperature sensor are provided at the air inlet end of the tube shell, a second pressure sensor and a second temperature sensor are provided at the air outlet end of the tube shell, and the first pressure sensor, the first temperature sensor, the second pressure sensor and the second temperature sensor are connected to the controller respectively.

[0017] Furthermore, the heating resistor is provided in plurality, and an electric control switch is provided on the line connecting the heating resistor and the generator, and the electric control switch is connected to the controller respectively.

[0018] The utility model has the following beneficial effects: the structure design is simple and reasonable, and the energy conversion of natural gas transportation is fully utilized to achieve the purpose of reducing the pressure of natural gas transportation and increasing the temperature of natural gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the natural gas self-heating pressure reduction device capable of realizing refined monitoring according to the utility model;

[0020] Figure 2 This is a structural side view of the natural gas self-heating and pressure-reducing device capable of realizing refined monitoring according to the utility model;

[0021] Figure 3 It is a structural schematic diagram of the electric heating device in the natural gas self-heating pressure reduction device capable of realizing refined monitoring according to the utility model.

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0023] 1. Tube shell; 2. Electric heating device; 3. Generator; 4. Air flow rotation drive device; 5. Controller; 11. Connecting flange; 21. Heat pipe; 22. Heating resistor. DETAILED DESCRIPTION

[0024] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0025] Example: Figure 1 , 2 As shown, the natural gas self-heating and pressure reduction device capable of realizing refined monitoring in this embodiment includes a tube shell 1 and an electric heating device 2, a generator 3 and an airflow rotation driving device 4 respectively installed in the above-mentioned tube shell 1, the above-mentioned airflow rotation driving device 4 is connected to the rotor shaft of the above-mentioned generator 3, and the above-mentioned generator 3 is connected to the above-mentioned electric heating device 2 through a wire (an insulating casing A is coated on the outside of the wire).

[0026] The usage process is as follows:

[0027] One end of the tube shell 1 is connected to the natural gas pipeline, and the pressurized natural gas is transported from one end of the tube shell 1 to the other end. During the transportation process, the natural gas flow acts on the airflow rotation driving device 4 to rotate it, thereby driving the rotor shaft of the generator 3 to rotate to achieve power generation. The generated current is transmitted to the electric heating device 2 to heat the natural gas flowing through, so that the natural gas at one end of the tube shell 1 and the other end has a set temperature difference. At the same time, when the natural gas acts on the airflow rotation driving device 4, the purpose of reducing the transportation pressure of the natural gas is achieved. The overall structural design is simple and reasonable, and full use is made of the energy conversion of natural gas transportation to achieve the purpose of reducing the pressure of natural gas transportation and increasing the temperature of natural gas.

[0028] In this embodiment, connection flanges 11 are provided at both ends of the tube shell 1. The connection flanges 11 are connected and fixed to the ports of the natural gas pipeline, which is convenient for assembly and disassembly. More specifically, the tube shell 1 is cylindrical, and the tube shell 1 can be made of the same material as the natural gas pipeline, with a pipe diameter and a wall thickness not less than the wall thickness of the connected natural gas pipeline. The two ends of the tube shell 1 are generally sealed and connected to the natural gas pipeline using the connection flanges 11.

[0029] As a preferred embodiment, the airflow rotation driving device 4 comprises an impeller, and the rotation center line of the impeller is perpendicular to the center line of the tube shell 1 .

[0030] In the above embodiment, when the natural gas flows from one end of the pipe shell 1 to the other end, it acts on the impeller, driving the impeller to rotate, thereby driving the rotor shaft of the generator 3 to rotate and generate electricity. Its angle and orientation are reasonably designed to conform to the flow trajectory of the natural gas, so that the impeller can be effectively driven to rotate.

[0031] In this embodiment, the generator 3 can be any product of suitable model on the market, and its specific structure will not be described in detail here.

[0032] As a preferred embodiment, the above-mentioned airflow rotation driving device 4 and the generator 3 are provided in multiple groups corresponding to each other.

[0033] In the above embodiment, multiple groups of airflow rotation driving devices 4 are arranged at appropriate intervals, which can effectively reduce the delivery pressure of natural gas. At the same time, the generators 3 are configured one-to-one, which can effectively convert into electrical energy.

[0034] As a preferred embodiment, Figure 3 As shown, the electric heating device 2 includes an insulated heat pipe 21 and a heating resistor 22. The heating resistor 22 is spirally arranged in the heat pipe 21 and connected to the generator 3 through a wire. The heat pipe 21 is filled with insulating powder filler.

[0035] In the above embodiment, the current generated by the generator 3 is transmitted to the heating resistor 22 via the conductor. The heating resistor 22 generates heat energy when the current passes through the heating resistor 22, which is transferred through the heat pipe 21 to exchange with the natural gas to heat the natural gas.

[0036] In this embodiment, the heating resistor 22 is made of any one of the iron-chromium-aluminum alloy series, the nickel-chromium electric heating alloy series, or tungsten and molybdenum electric heating alloy wires, preferably the nickel-chromium electric heating alloy Ni20Cr80.

[0037] In this embodiment, the heating resistor 22 is spirally embedded in the insulated heat pipe 21, the distance between the heating resistor 22 and the heat pipe 21 is more than 2 mm (for example, 2-5 mm), the gap in the pipe is filled with powdered insulating filler (such as powdered magnesium oxide insulating filler), the heat pipe 21 is generally made of insulating ceramic (that is, ceramic tube), the heat pipe 21 is fixed on the inner wall of the tube shell 1, and the heat pipe 21 is welded to the inner wall of the tube shell 1.

[0038] In this embodiment, one end of the tube shell 1 is the air inlet end, and the other end is the air outlet end. The airflow rotation driving device 4 is arranged near the air inlet end. The arrangement of the airflow rotation driving device 4 in the tube shell 1 is relatively reasonable.

[0039] As a preferred embodiment, the air inlet end of the tube shell 1 is provided with a first pressure sensor and a temperature sensor, the air outlet end of the tube shell 1 is provided with a second pressure sensor and a second temperature sensor, and the first pressure sensor, the first temperature sensor, the second pressure sensor and the second temperature sensor are respectively connected to the controller 5.

[0040] In the above implementation scheme, the first pressure sensor and the second pressure sensor respectively monitor the gas pressure at the air inlet and the air outlet of the tube shell 1, and the first temperature sensor and the second temperature sensor respectively monitor the temperature information of the natural gas at the air inlet and the air outlet, and the two sets of data are fed back to the controller 5 respectively, and the controller 5 can summarize the information to facilitate the operating personnel to understand the pressure reduction and temperature increase data of the natural gas.

[0041] As a preferred embodiment, a plurality of the heating resistors 22 are provided, and an electric control switch is provided on the line connecting the heating resistor 22 and the generator 3 , and the electric control switches are respectively connected to the controller 5 .

[0042] In the above implementation scheme, the controller 5 can control the opening and closing of the electric control switch, thereby controlling the current input to the corresponding heating resistor 22, and adjusting the heating temperature of the natural gas by controlling the amount of heat generated by the heating resistor 22. More specifically, the heating resistor 22 is adjusted to work according to the temperature difference between the air inlet and air outlet ends of the shell 1, thereby accurately adjusting the data of the temperature increase of the natural gas at the air outlet, thereby heating the natural gas to the required temperature. Taking actual data as an example, the flow rate of the natural gas at the air inlet end of the shell 1 is 300×104m3 / h, the temperature is 5°C, and the pressure is 4.4MPa. The resistance of the airflow rotation driving device 4 to the natural gas is used to reduce the pressure of the natural gas, and then the natural gas is heated by the heating resistor 22, so that the natural gas at the air outlet is reduced in pressure to 4MPa and the temperature is increased to 7°C.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0045] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0048] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A natural gas self-heating and pressure reduction device capable of realizing refined monitoring, characterized in that: The invention comprises a tube shell (1) and an electric heating device (2), a generator (3) and an airflow rotation driving device (4) respectively installed in the tube shell (1); the airflow rotation driving device (4) is connected to the rotor shaft of the generator (3); the generator (3) is connected to the electric heating device (2) via a wire; the electric heating device (2) comprises an insulating heat pipe (21) and a heating resistor (22); the heating resistor (22) is spirally arranged in the heat pipe (21) and connected to the generator (3) via a wire; the heat pipe (21) is filled with insulating powder filler.

2. A natural gas self-heating and pressure-reducing device capable of realizing refined monitoring according to claim 1, characterized in that: The two ends of the tube shell (1) are respectively provided with connecting flanges (11).

3. The natural gas self-heating and pressure-reducing device capable of realizing refined monitoring according to claim 1 is characterized in that: The airflow rotation driving device (4) comprises an impeller, and the rotation center line of the impeller is perpendicular to the center line of the tube shell (1).

4. The natural gas self-heating and pressure-reducing device capable of realizing refined monitoring according to claim 1 is characterized in that: The airflow rotation driving device (4) and the generator (3) are provided in multiple groups in a one-to-one correspondence.

5. The natural gas self-heating and pressure reduction device capable of realizing refined monitoring according to claim 1 is characterized in that: The insulating powder filler is a magnesium oxide powder filler.

6. The natural gas self-heating and pressure reduction device capable of realizing refined monitoring according to claim 1 is characterized in that: The heat conducting tube (21) is a ceramic tube.

7. The natural gas self-heating and pressure reduction device capable of realizing refined monitoring according to claim 1 is characterized in that: One end of the tube shell (1) is an air inlet end, and the other end is an air outlet end, and the airflow rotation driving device (4) is arranged at a position close to the air inlet end.

8. A natural gas self-heating and pressure-reducing device capable of realizing refined monitoring according to claim 7, characterized in that: The air inlet end of the tube shell (1) is provided with a first pressure sensor and a temperature sensor, the air outlet end of the tube shell (1) is provided with a second pressure sensor and a second temperature sensor, and the first pressure sensor, the first temperature sensor, the second pressure sensor and the second temperature sensor are respectively connected to a controller (5).

9. A natural gas self-heating and pressure-reducing device capable of realizing refined monitoring according to claim 8, characterized in that: A plurality of heating resistors (22) are provided, and an electric control switch is provided on the line connecting the heating resistor (22) and the generator (3), and the electric control switches are respectively connected to the controllers (5).

Images