Gas heating device and method

Abstract

A gas heating device and method are used for improving the condition of poor temperature control precision. The gas heating device comprises a first-stage electric heating part, a low-temperature pipeline, a second-stage electric heating part, a medium-temperature pipeline, a low-temperature supplementing pipeline and a high-temperature pipeline. The first-stage electric heating part is used for heating low-temperature gas to obtain medium-temperature gas; the low-temperature pipeline is communicated with the first-stage electric heating part and conveys low-temperature gas to the first-stage electric heating part; the second-stage electric heating part is used for heating the low-temperature gas and / or the medium-temperature gas to obtain high-temperature gas; the medium-temperature pipeline is communicated with the first-stage electric heating part, a finished product output branch and a heating output branch are arranged, the finished product output branch conveys medium-temperature gas to a medium-temperature user, the heating output branch is communicated with the second-stage electric heating part, and the heating output branch conveys medium-temperature gas to the second-stage electric heating part; the low-temperature supplementing pipeline is communicated with the second-stage electric heating part and conveys low-temperature gas to the second-stage electric heating part; and the high-temperature pipeline is communicated with the second-stage electric heating part and conveys high-temperature gas to a high-temperature user.

Description

Technical Field

[0001] The invention relates to a gas heating device and a method. Background Art

[0002] In the field of aerospace, a large flow of medium-temperature and high-temperature gas is generated by natural gas combustion and blending, aviation kerosene combustion and blending, or engine exhaust blending. The gas temperature is low and the temperature control accuracy is poor. The method of using natural gas combustion and blending or aviation kerosene combustion and blending as the first-level heating and electric heater as the second-level heating solves the problem of low gas temperature, but the temperature control accuracy is still poor. Summary of the invention

[0003] The object of the present invention is to provide a gas heating device and method for improving the situation of poor temperature control accuracy.

[0004] In the first aspect, the present invention provides a gas heating device. According to an embodiment of the present invention, the gas heating device includes a first-level electric heating unit, a low-temperature pipeline, a second-level electric heating unit, a medium-temperature pipeline, a low-temperature supplementary pipeline, and a high-temperature pipeline. The first-level electric heating unit heats low-temperature gas to obtain medium-temperature gas; the low-temperature pipeline is connected to the first-level electric heating unit and delivers low-temperature gas to the first-level electric heating unit; the second-level electric heating unit heats low-temperature gas and / or medium-temperature gas to obtain high-temperature gas; the medium-temperature pipeline is connected to the first-level electric heating unit, and a finished product output branch and a heating output branch are set. The finished product output branch delivers medium-temperature gas to medium-temperature users, and the heating output branch is connected to the second-level electric heating unit, and the heating output branch delivers medium-temperature gas to the second-level electric heating unit; the low-temperature supplementary pipeline is connected to the second-level electric heating unit and delivers low-temperature gas to the second-level electric heating unit; the high-temperature pipeline is connected to the second-level electric heating unit and delivers high-temperature gas to high-temperature users.

[0005] In one or more embodiments, the cryogenic pipeline and the cryogenic supplementary pipeline are respectively provided with a flow meter and an exhaust branch, the exhaust branch is connected to the exhaust silencer tower, the exhaust branch is provided with an exhaust valve, and the flow meter interlock controls the exhaust valve to discharge excess cryogenic gas.

[0006] In one or more embodiments, the low-temperature pipeline and the low-temperature supplementary pipeline are respectively provided with a coalescing deliquent device to dry the low-temperature gas.

[0007] In one or more embodiments, the gas heating device is provided with a plurality of the first-level electric heating parts, and the gas heating device is provided with a plurality of the low-temperature pipes, each of the low-temperature pipes is connected to one of the first-level electric heating parts; the gas heating device is provided with a low-temperature intermediate pipe, the low-temperature intermediate pipe is connected to at least two of the low-temperature pipes, and the low-temperature intermediate pipe is provided with a switch valve and a regulating valve.

[0008] In one or more embodiments, the multiple first-level electric heating parts include a first first-level electric heating part and a second first-level electric heating part, and the medium-temperature pipeline includes a first medium-temperature pipeline and a second medium-temperature pipeline; the first first-level electric heating part is configured with the first medium-temperature pipeline, and the first medium-temperature pipeline is provided with the heating output branch and the finished product output branch, and the heating output branch and the finished product output branch are respectively provided with switch valves; the second first-level electric heating part is configured with the second medium-temperature pipeline, and the second medium-temperature pipeline is provided with the finished product output branch, and the finished product output branch is provided with a switch valve; the gas heating device is provided with a medium-temperature intermediate pipeline, and the medium-temperature intermediate pipeline connects the first medium-temperature pipeline and the second medium-temperature pipeline, and the medium-temperature intermediate pipeline is provided with a switch valve.

[0009] In one or more embodiments, the gas heating device is provided with a plurality of the secondary electric heating parts, the plurality of secondary electric heating parts include a first secondary electric heating part and a second secondary electric heating part, the first first electric heating part is configured with the first secondary electric heating part and the second secondary electric heating part; the high-temperature pipe includes a first high-temperature pipe and a second high-temperature pipe, the first secondary electric heating part is configured with the first high-temperature pipe, and the second secondary electric heating part is configured with the second high-temperature pipe.

[0010] In one or more embodiments, the multiple first-level electric heating parts include a first first-level electric heating part and a second first-level electric heating part, and the medium-temperature pipe includes a first medium-temperature pipe and a second medium-temperature pipe; the first first-level electric heating part is configured with the first medium-temperature pipe, and the first medium-temperature pipe is provided with the heating output branch and the finished product output branch, and the heating output branch and the finished product output branch are respectively provided with switch valves; the second first-level electric heating part is configured with the second medium-temperature pipe, and the second medium-temperature pipe is provided with the heating output branch and the finished product output branch, and the heating output branch and the finished product output branch are respectively provided with switch valves.

[0011] In one or more embodiments, the gas heating device is provided with a plurality of the secondary electric heating parts, and the plurality of secondary electric heating parts include a first secondary electric heating part and a second secondary electric heating part, the first first electric heating part is configured with the first secondary electric heating part, and the second first electric heating part is configured with the second secondary electric heating part; the high-temperature pipe includes a first high-temperature pipe and a second high-temperature pipe, the first second-level electric heating part is configured with the first high-temperature pipe, and the second second-level electric heating part is configured with the second high-temperature pipe.

[0012] In one or more embodiments, the gas heating device is provided with a high-temperature intermediate pipe, the high-temperature intermediate pipe connects the first high-temperature pipe and the second high-temperature pipe, the high-temperature intermediate pipe is provided with an 8-shaped blind plate, and the second high-temperature pipe is provided with an 8-shaped blind plate.

[0013] In one or more embodiments, rectifiers are respectively provided for the finished product output branch and the high-temperature pipeline.

[0014] In one or more embodiments, the rectifier includes a rectifying orifice plate, and the rectifying orifice plate is provided with honeycomb hexagonal channels, the height of each of the hexagonal channels is greater than 10 mm and less than 30 mm, the wall thickness of each of the hexagonal channels is greater than 2 mm and less than 10 mm, and the length of each of the hexagonal channels is greater than 10 mm and less than 300 mm; the rectifying orifice plate includes a first rectifying orifice plate, a second rectifying orifice plate and a third rectifying orifice plate, and the gas flows through the first rectifying orifice plate, the second rectifying orifice plate and the third rectifying orifice plate in sequence, the first rectifying orifice plate and the second rectifying orifice plate are used to uniform the airflow temperature, and the third rectifying orifice plate is used to uniform the airflow pressure.

[0015] In one or more embodiments, the first-level electric heating part includes a plurality of first-level electric heaters connected in parallel, and each of the first-level electric heaters is provided with the same air intake duct and exhaust duct; the second-level electric heating part includes a plurality of second-level electric heaters connected in parallel, and each of the second-level electric heaters is provided with the same air intake duct and exhaust duct.

[0016] In a second aspect, the present invention provides a gas heating method. According to an embodiment of the present invention, the gas heating method comprises: step A 0 . The low-temperature pipeline transports the low-temperature gas to the first-level electric heating part; step B 0 The first-stage electric heating unit heats the low-temperature gas to obtain the medium-temperature gas; Step C 0 . The medium-temperature pipeline transports the medium-temperature gas to the medium-temperature user through the finished product output branch; or, step C 1 The medium temperature pipeline transports the medium temperature gas through the heating output branch to the secondary electric heating part, step D 1 The secondary electric heating unit heats the medium temperature gas to obtain high temperature gas, step E 1 . The high temperature pipeline transports the high temperature gas to the high temperature user; and / or, step A 2 . The low temperature supplementary pipeline transports the low temperature gas to the secondary electric heating part, step B 2 The secondary electric heating unit heats the low-temperature gas to obtain high-temperature gas, step C 2 .High-temperature pipelines transport high-temperature gases to high-temperature users.

[0017] In one or more embodiments, step A 0 The flow meter of the cryogenic pipeline controls the exhaust valve of the exhaust branch of the cryogenic pipeline to open, and the exhaust branch conveys excess cryogenic gas to the exhaust silencer tower for discharge; the step A 2It also includes a flow meter of the low-temperature supplementary pipeline controlling the exhaust valve of the exhaust branch of the low-temperature supplementary pipeline to open, and the exhaust branch conveys excess low-temperature gas to the exhaust muffler tower for discharge;

[0018] In one or more embodiments, step A 0 The invention also includes a coalescing deliquator in a low-temperature pipeline to dry the low-temperature gas; the step A 2 It also includes a coalescing and deliquoring device in a low-temperature supplementary pipeline to dry the low-temperature gas.

[0019] In one or more embodiments, step A 0 It also includes opening the switch valve of the low-temperature intermediate pipeline, and multiple low-temperature pipelines transport low-temperature gas to a first-level electric heating part through the low-temperature intermediate pipeline; or, closing the switch valve of the low-temperature intermediate pipeline, and each low-temperature pipeline transports low-temperature gas to each first-level electric heating part.

[0020] In one or more embodiments, step C 0 It also includes closing the switch valve of the medium-temperature intermediate pipeline, closing the switch valve of the heating output branch of the first medium-temperature pipeline of the first-level electric heating unit, opening the switch valve of the finished product output branch of the first medium-temperature pipeline of the first-level electric heating unit, delivering medium-temperature gas to the first medium-temperature user, opening the switch valve of the finished product output branch of the second medium-temperature pipeline of the second-level electric heating unit, and delivering medium-temperature gas to the second medium-temperature user; or, opening the switch valve of the medium-temperature intermediate pipeline, closing the switch valve of the heating output branch of the first medium-temperature pipeline of the first-level electric heating unit, opening the switch valve of the finished product output branch of the first medium-temperature pipeline of the first-level electric heating unit, delivering medium-temperature gas to the first medium-temperature user, closing the switch valve of the finished product output branch of the second medium-temperature pipeline of the second-level electric heating unit, and delivering medium-temperature gas to the first medium-temperature user via the medium-temperature intermediate pipeline.

[0021] In one or more embodiments, step C 1 It also includes a switch valve for opening the heating output branch of the first medium-temperature pipeline of the first primary electric heating part to transport the medium-temperature gas to the first secondary electric heating part and the second secondary electric heating part.

[0022] In one or more embodiments, step C 0 It also includes closing the switch valve of the heating output branch of the first medium-temperature pipeline of the first-level electric heating unit, opening the switch valve of the finished product output branch of the first medium-temperature pipeline of the first-level electric heating unit, and delivering medium-temperature gas to the first medium-temperature user, closing the switch valve of the heating output branch of the second medium-temperature pipeline of the second-level electric heating unit, and opening the switch valve of the finished product output branch of the second medium-temperature pipeline of the second-level electric heating unit to deliver medium-temperature gas to the second medium-temperature user.

[0023] In one or more embodiments, step C 1It also includes opening the switch valve of the heating output branch of the first medium-temperature pipeline of the first primary electric heating part to transport the medium-temperature gas to the first secondary electric heating part, opening the switch valve of the heating output branch of the second medium-temperature pipeline of the second primary electric heating part to transport the medium-temperature gas to the second secondary electric heating part.

[0024] In one or more embodiments, the step E 1 and step C 2 It also includes the first high-temperature pipeline transporting the high-temperature gas obtained by the first and second electric heating parts to the first high-temperature user, the 8-shaped blind plate of the high-temperature intermediate pipeline cuts off the high-temperature intermediate pipeline, the 8-shaped blind plate of the second high-temperature pipeline opens the second high-temperature pipeline, and the second high-temperature pipeline transports the high-temperature gas obtained by the second and second electric heating parts to the second high-temperature user; or, the first high-temperature pipeline transports the high-temperature gas obtained by the first and second electric heating parts to the first high-temperature user, the 8-shaped blind plate of the second high-temperature pipeline cuts off the second high-temperature pipeline, the 8-shaped blind plate of the high-temperature intermediate pipeline opens the high-temperature intermediate pipeline, and the high-temperature gas obtained by the second and second electric heating parts is transported to the first high-temperature user via the high-temperature intermediate pipeline.

[0025] In one or more embodiments, step C 0 The step E also includes a rectifier in the finished product output branch of the medium temperature pipeline to rectify the medium temperature gas; 1 The high temperature pipeline also includes a rectifier to rectify the high temperature gas; the step C 2 The high temperature pipeline also includes a rectifier for rectifying the high temperature gas.

[0026] The embodiments of the present invention have at least the following beneficial effects:

[0027] The first-stage electric heating unit performs first-stage electric heating on the low-temperature gas to obtain medium-temperature gas, and the second-stage electric heating unit performs second-stage electric heating on the medium-temperature gas to obtain high-temperature gas, thereby improving the temperature control accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

[0029] Figure 1 A schematic diagram of a gas heating device according to an embodiment of the present application;

[0030] Figure 2 A schematic diagram of a gas heating device according to another embodiment of the present application;

[0031] Figure 3 A schematic diagram of a gas heating device according to another embodiment of the present application;

[0032] Figure 4 is the axial cross-section of the rectifier;

[0033] Figure 5 is an oblique view of the hexagonal channel of the rectifier;

[0034] Figure 6 It is the front view of the 8-shaped blind plate;

[0035] Figure 7 It is an oblique view of the air inlet duct and the exhaust duct of a plurality of electric heaters connected in parallel;

[0036] Figure 8 It is an oblique view of the air inlet duct and the exhaust duct of a plurality of electric heaters connected in parallel;

[0037] Fig. 9 It is an oblique view of the air inlet duct and the exhaust duct of a plurality of electric heaters connected in parallel;

[0038] Fig.10 A flow chart of a method for heating a gas;

[0039] Reference numerals:

[0040] 1-First-level electric heating unit;

[0041] 2-Cryogenic pipelines;

[0042] 3- Secondary electric heating unit;

[0043] 4-Medium temperature pipeline;

[0044] 5- Finished product output branch;

[0045] 6- Heating output branch;

[0046] 7- Low temperature supplementary pipeline;

[0047] 8-High temperature pipeline;

[0048] 9-Flow meter;

[0049] 10- Exhaust branch;

[0050] 11- Exhaust valve;

[0051] 12- Exhaust silencer tower;

[0052] 13- Coalescing and deliquification device;

[0053] 14- Low temperature intermediate pipeline;

[0054] 15- switch valve;

[0055] 16- regulating valve;

[0056] 17- first level electric heating unit;

[0057] 18- second level electric heating unit;

[0058] 19- first medium temperature pipeline;

[0059] 20- second medium temperature pipeline;

[0060] 21-Medium temperature intermediate pipeline;

[0061] 22- first and second level electric heating parts;

[0062] 23- second secondary electric heating part;

[0063] 24-first high temperature pipeline;

[0064] 25-second high temperature pipeline;

[0065] 26-8 word blind plate;

[0066] 27-High temperature intermediate pipeline;

[0067] 28-rectifier;

[0068] 29-First-level electric heating group;

[0069] 30-First-level electric heater;

[0070] 31- Secondary electric heater;

[0071] 32-first rectifying orifice plate;

[0072] 33- second rectifying orifice plate;

[0073] 34- the third rectifying orifice plate;

[0074] 35- hexagonal channel;

[0075] 36-blind end;

[0076] 37-ring end;

[0077] 38-intake pipe;

[0078] 39-Exhaust duct. DETAILED DESCRIPTION

[0079] Reference will now be made in detail to embodiments of the present invention, one or more examples of which are illustrated in the accompanying drawings. Each example is provided to explain the present invention, not to limit the present invention. In fact, it will be apparent to those skilled in the art that various modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature illustrated or described as part of one embodiment may be used together with another embodiment to produce yet another embodiment. Therefore, the present invention is intended to cover these modifications and variations within the scope of the appended claims and their equivalents.

[0080] It should be noted that these and other subsequent drawings are only examples and are not drawn to scale, and should not be used to limit the actual scope of protection required by the present invention.

[0081] The terms "first", "second", etc. may be used interchangeably to distinguish one feature from another, and are not intended to mean that each feature must be located as shown in the figures in each embodiment.

[0082] like Figures 1 to 3 As shown, the gas heating device includes a first-stage electric heating unit 1, which heats low-temperature gas to obtain medium-temperature gas. Fig.10 As shown, the gas heating method includes step B 0 . The first-stage electric heating unit 1 heats the low-temperature gas to obtain the medium-temperature gas

[0083] The gas heating device includes a low-temperature pipeline 2, which is connected to the first-stage electric heating part 1 and delivers low-temperature gas to the first-stage electric heating part 1. Fig.10 As shown, the gas heating method includes step A 0 .The low-temperature pipeline 2 transports the low-temperature gas to the first-level electric heating part 1.

[0084] The gas heating device includes a medium temperature pipeline 4, which is connected to the first-level electric heating unit 1 and is provided with a finished product output branch 5. The finished product output branch 5 delivers medium temperature gas to medium temperature users, and the medium temperature users may be user 1, user 2, and user 5 in the figure. Fig.10 As shown, the gas heating method includes step C 0 The medium-temperature pipeline 4 transports the medium-temperature gas to the medium-temperature users through the finished product output branch 5.

[0085] The gas heating device includes a secondary electric heating unit 3, which heats low-temperature gas and / or medium-temperature gas to obtain high-temperature gas. Fig.10 As shown, the gas heating method includes step D 1 The secondary electric heating unit 3 heats the medium-temperature gas to obtain high-temperature gas.

[0086] The medium temperature pipeline 4 is provided with a heating output branch 6. The heating output branch 6 is connected to the secondary electric heating part 3 to deliver the medium temperature gas to the secondary electric heating part 3. Fig.10 As shown, the gas heating method includes step C 1 The medium-temperature pipeline 4 transports the medium-temperature gas through the heating output branch 6 to the secondary electric heating part 3.

[0087] The gas heating device includes a high-temperature pipeline 8, which is connected to the secondary electric heating unit 3 to deliver high-temperature gas to high-temperature users, which may be users 3 and 4 in the figure. Fig.10 As shown, the gas heating method includes step E 1.The high temperature pipeline 8 transports the high temperature gas to the high temperature users.

[0088] The first-stage electric heating part 1 performs first-stage electric heating on the low-temperature gas to obtain medium-temperature gas, and the second-stage electric heating part 3 performs second-stage electric heating on the medium-temperature gas to obtain high-temperature gas, thereby improving the temperature control accuracy.

[0089] The medium-temperature gas obtained by the first-stage electric heating unit 1 can be transported to medium-temperature users through the finished product output branch 5. Alternatively, the medium-temperature gas obtained by the first-stage electric heating unit 1 can be transported to the second-stage electric heating unit 3 through the heating output branch 6, and the high-temperature gas is obtained by the second-stage electric heating unit 3 and transported to high-temperature users through the high-temperature pipeline 8.

[0090] The gas heating device includes a low-temperature supplementary pipeline 7, which is connected to the secondary electric heating part 3 and delivers low-temperature gas to the secondary electric heating part 3. Fig.10 As shown, the gas heating method includes step A 2 . The low-temperature supplementary pipeline 7 delivers low-temperature gas to the secondary electric heating part 3, step B 2 The secondary electric heating unit 3 heats the low-temperature gas to obtain high-temperature gas, step C 2 The high temperature pipeline 8 delivers the high temperature gas to the high temperature user. In step C 2 and step E 1 When all the medium-temperature gas obtained by the first-stage electric heating unit 1 is delivered to the medium-temperature user, the low-temperature supplementary pipeline 7 can deliver the low-temperature gas to the second-stage electric heating unit 3, and the high-temperature gas is obtained by the second-stage electric heating unit 3 and delivered to the high-temperature user through the high-temperature pipeline 8.

[0091] like Figures 1 to 3 As shown, the cryogenic pipeline 2 and the cryogenic supplementary pipeline 7 can be provided with a flow meter 9 and an exhaust branch 10 respectively. The exhaust branch 10 is connected to the exhaust silencer tower 12. The exhaust branch 10 is provided with an exhaust valve 11. The flow meter 9 interlocks and controls the exhaust valve 11. When the flow meter 9 detects that the cryogenic gas is excessive, the flow meter 9 controls to open the exhaust valve 11. The excess cryogenic gas flows to the exhaust silencer tower 12 through the exhaust branch 10 and is discharged to the atmosphere at the exhaust silencer tower 12. Step A 0 The flow meter 9 of the cryogenic pipeline 2 controls the exhaust valve 11 of the exhaust branch 10 of the cryogenic pipeline 2 to open, and the exhaust branch 10 conveys excess cryogenic gas to the exhaust muffler tower 12 for discharge. Step A 2 It also includes a flow meter 9 of the low-temperature supplementary pipeline 7 to control the opening of the exhaust valve 11 of the exhaust branch 10 of the low-temperature supplementary pipeline 7, and the exhaust branch 10 transports excess low-temperature gas to the exhaust silencer tower 12 for discharge.

[0092] like Figures 1 to 3As shown, the low temperature pipeline 2 and the low temperature supplementary pipeline 7 can be respectively provided with a coalescing deliquator 13, and the coalescing deliquator 13 dries the low temperature gas and removes trace liquid water particles in the low temperature gas. Step A 0 The low temperature pipeline 2 also includes a coalescing deliquator 13 to dry the low temperature gas. Step A 2 The low-temperature supplementary pipeline 7 also includes a coalescing and deliquoring device 13 for drying the low-temperature gas.

[0093] like Figures 1 to 3 As shown, the gas heating device can be provided with multiple first-level electric heating parts 1, and the gas heating device can be provided with multiple low-temperature pipelines 2, each low-temperature pipeline 2 is connected to a first-level electric heating part 1, and delivers low-temperature gas to a first-level electric heating part 1. Figure 1 and Figure 2 As shown, the gas heating device may be provided with a low-temperature intermediate pipeline 14, and the low-temperature intermediate pipeline 14 is connected to at least two low-temperature pipelines 2. The low-temperature intermediate pipeline 14 may be provided with a switch valve 15 and a regulating valve 16. When the switch valve 15 of the low-temperature intermediate pipeline 14 is closed, the multiple low-temperature pipelines 2 transport the low-temperature gas to the same number of multiple first-level electric heating parts 1, and each low-temperature pipeline 2 transports the low-temperature gas to a corresponding first-level electric heating part 1. When the switch valve 15 of the low-temperature intermediate pipeline 14 is opened, the multiple low-temperature pipelines 2 transport the low-temperature gas to the first-level electric heating parts 1 that are less than the number of low-temperature pipelines 2, and the low-temperature gas in the low-temperature pipelines 2 can flow to other first-level electric heating parts 1 through the low-temperature intermediate pipeline 14. Step A 0 It also includes: opening the switch valve 15 of the low-temperature intermediate pipeline 14, and multiple low-temperature pipelines 2 transport low-temperature gas to a first-level electric heating part 1 through the low-temperature intermediate pipeline 14, or closing the switch valve 15 of the low-temperature intermediate pipeline 14, and each low-temperature pipeline 2 transports low-temperature gas to each first-level electric heating part 1.

[0094] like Figures 1 to 3 As shown, the plurality of first-stage electric heating parts 1 may include a first first-stage electric heating part 17 and a second first-stage electric heating part 18. Figure 1 and Figure 2 As shown, the low-temperature intermediate pipeline 14 connects two low-temperature pipelines 2. When the switch valve 15 of the low-temperature intermediate pipeline 14 is closed, the two low-temperature pipelines 2 transport low-temperature gas to two first-level electric heating parts 1, and each low-temperature pipeline 2 transports low-temperature gas to a corresponding first-level electric heating part 1. When the switch valve 15 of the low-temperature intermediate pipeline 14 is opened, the two low-temperature pipelines 2 transport low-temperature gas to one first-level electric heating part 1, and the low-temperature gas of one low-temperature pipeline 2 flows to another first-level electric heating part 1 through the low-temperature intermediate pipeline 14. Step A 0It also includes: opening the switch valve 15 of the low-temperature intermediate pipeline 14, and the two low-temperature pipelines 2 transport the low-temperature gas to a first-level electric heating part 1 through the low-temperature intermediate pipeline 14, or closing the switch valve 15 of the low-temperature intermediate pipeline 14, and each low-temperature pipeline 2 transports the low-temperature gas to each first-level electric heating part 1.

[0095] like Figures 1 to 3 As shown, the medium temperature pipe 2 may include a first medium temperature pipe 19 and a second medium temperature pipe 20. Figure 1 and Figure 3 As shown, the first electric heating section 17 is provided with a first medium-temperature pipe 19, the first electric heating section 17 is connected to the first medium-temperature pipe 19, the first medium-temperature pipe 19 is provided with a heating output branch 6 and a finished product output branch 5, and the heating output branch 6 and the finished product output branch 5 are provided with a switch valve 15 respectively. The second electric heating section 18 is provided with a second medium-temperature pipe 20, the second electric heating section 18 is connected to the second medium-temperature pipe 20, the second medium-temperature pipe 20 is provided with a finished product output branch 5, and the finished product output branch is provided with a switch valve 15. The gas heating device can be provided with a medium-temperature intermediate pipe 21, the medium-temperature intermediate pipe 21 is connected to the first medium-temperature pipe 19 and the second medium-temperature pipe 20, and the medium-temperature intermediate pipe 21 is provided with a switch valve 15. Step C 0 It also includes: closing the switch valve 15 of the medium-temperature intermediate pipeline 21, closing the switch valve 15 of the heating output branch 6 of the first medium-temperature pipeline 19 of the first-level electric heating unit 17, opening the switch valve 15 of the finished product output branch 5 of the first medium-temperature pipeline 19 of the first-level electric heating unit 17, and the first-level electric heating unit 17 delivers medium-temperature gas to the first medium-temperature user (user 1 and user 2 in the figure) through the finished product output branch 5, opening the switch valve 15 of the finished product output branch 5 of the second medium-temperature pipeline 20 of the second-level electric heating unit 18, and the second-level electric heating unit 18 delivers medium-temperature gas to the second medium-temperature user (user 5 in the figure) through the finished product output branch 5; or , open the switch valve 15 of the medium-temperature intermediate pipeline 21, close the switch valve 15 of the heating output branch 6 of the first medium-temperature pipeline 19 of the first first-level electric heating unit 17, open the switch valve 15 of the finished product output branch 5 of the first medium-temperature pipeline 19 of the first first-level electric heating unit 17, and the first first-level electric heating unit 17 delivers medium-temperature gas to the first medium-temperature user (user 1 and user 2 in the figure) through the finished product output branch 5, close the switch valve 15 of the finished product output branch 5 of the second medium-temperature pipeline 20 of the second first-level electric heating unit 18, and the second first-level electric heating unit 18 delivers medium-temperature gas to the first medium-temperature user (user 1 and user 2 in the figure) through the medium-temperature intermediate pipeline 21. The switch valve 15 of the medium-temperature intermediate pipeline 21 is closed, and the first first-level electric heating unit 17 and the second first-level electric heating unit 1 supply medium-temperature gas to their respective medium-temperature users. The switch valve 15 of the medium-temperature intermediate pipeline 21 is opened, and the first first-level electric heating unit 17 and the second first-level electric heating unit 18 can supply medium-temperature gas to the same medium-temperature user.

[0096] like Figure 2 As shown, the gas heating device may not be provided with the medium-temperature intermediate pipeline 21, and the second medium-temperature pipeline 20 may also be provided with a heating output branch 6 and a finished product output branch 5, and the heating output branch 6 and the finished product output branch 5 are respectively provided with a switch valve 15. Step C 0 It also includes closing the switch valve 15 of the heating output branch 6 of the first medium-temperature pipe 19 of the first first-level electric heating unit 17, opening the switch valve 15 of the finished product output branch 5 of the first medium-temperature pipe 19 of the first first-level electric heating unit 17, and the first first-level electric heating unit 17 delivers medium-temperature gas to the first medium-temperature user (user 1 and user 2 in the figure) via the finished product output branch 5, closing the switch valve 15 of the heating output branch 6 of the second medium-temperature pipe 20 of the second first-level electric heating unit 18, and opening the switch valve 15 of the finished product output branch 5 of the second medium-temperature pipe 20 of the second first-level electric heating unit 18, and the second first-level electric heating unit 18 delivers medium-temperature gas to the second medium-temperature user (user 5 in the figure) via the finished product output branch 5.

[0097] like Figure 1 and Figure 3 As shown, the gas heating device may be provided with a plurality of secondary electric heating parts 3, the plurality of secondary electric heating parts 3 may include a first secondary electric heating part 22 and a second secondary electric heating part 23, the first primary electric heating part 17 is provided with a first secondary electric heating part 22 and a second secondary electric heating part 23, the first primary electric heating part 17 is connected with the first secondary electric heating part 22 and the second secondary electric heating part 23, and supplies medium temperature gas to the first secondary electric heating part 22 and the second secondary electric heating part 23. Step C 1 It also includes a switch valve 15 for opening the heating output branch 6 of the first medium-temperature pipe 19 of the first primary electric heating part 17. The first primary electric heating part 17 transports the medium-temperature gas to the first secondary electric heating part 22 and the second secondary electric heating part 23 through the heating output branch 6 of the first medium-temperature pipe 19.

[0098] like Figure 2 As shown, the gas heating device may be provided with a plurality of secondary electric heating parts 3, the plurality of secondary electric heating parts 3 may include a first secondary electric heating part 22 and a second secondary electric heating part 23, the first primary electric heating part 17 is provided with a first secondary electric heating part 22, the first primary electric heating part 17 is connected to the first secondary electric heating part 22, the first primary electric heating part 17 supplies medium-temperature gas to the first secondary electric heating part 22, the second primary electric heating part 18 is provided with a second secondary electric heating part 23, the second primary electric heating part 18 is connected to the second secondary electric heating part 23, and the second primary electric heating part 18 supplies medium-temperature gas to the second secondary electric heating part 23. Step C 1It also includes opening the switch valve 15 of the heating output branch 6 of the first medium-temperature pipe 19 of the first-level electric heating part 17, and the first-level electric heating part 17 transports the medium-temperature gas to the first-level electric heating part 22 via the heating output branch 6 of the first medium-temperature pipe 19, and opening the switch valve 15 of the heating output branch 6 of the second medium-temperature pipe 20 of the second-level electric heating part 18, and the second-level electric heating part 18 transports the medium-temperature gas to the second-level electric heating part 23 via the heating output branch 6 of the second medium-temperature pipe 20.

[0099] like Figures 1 to 3 As shown, the high-temperature pipeline 8 may include a first high-temperature pipeline 24 and a second high-temperature pipeline 25, the first and second electric heating parts 22 are configured with the first high-temperature pipeline 24, the first and second electric heating parts 22 are connected to the first high-temperature pipeline 24, and the first and second electric heating parts 22 transport high-temperature gas to the first high-temperature user (user 3 in the figure) via the first high-temperature pipeline 24, the second and second electric heating parts 23 are configured with the second high-temperature pipeline 25, the second and second electric heating parts 23 are connected to the second high-temperature pipeline 25, and the second and second electric heating parts 23 transport high-temperature gas to the second high-temperature user (user 4 in the figure) via the second high-temperature pipeline 25.

[0100] like Figures 1 to 3 As shown, the gas heating device may be provided with a high-temperature intermediate pipe 27, the high-temperature intermediate pipe 27 connects the first high-temperature pipe 24 and the second high-temperature pipe 25, the high-temperature intermediate pipe 27 is provided with an 8-shaped blind plate 26, and the second high-temperature pipe 25 is provided with an 8-shaped blind plate 26. Step E 1 and step C 2 It also includes a first high-temperature pipeline 24 that transports the high-temperature gas obtained by the first and second-level electric heating parts 22 to the first high-temperature user (user 3 in the figure), the 8-shaped blind plate 26 of the high-temperature intermediate pipeline 27 cuts off the high-temperature intermediate pipeline 27, the 8-shaped blind plate 26 of the second high-temperature pipeline 25 opens the second high-temperature pipeline 25, and the second high-temperature pipeline 25 transports the high-temperature gas obtained by the second and second-level electric heating parts 23 to the second high-temperature user (user 4 in the figure); or, the first high-temperature pipeline 24 transports the high-temperature gas obtained by the first and second-level electric heating parts 22 to the first high-temperature user (user 3 in the figure), the 8-shaped blind plate 26 of the second high-temperature pipeline 25 cuts off the second high-temperature pipeline 25, the 8-shaped blind plate 26 of the high-temperature intermediate pipeline 27 opens the high-temperature intermediate pipeline 27, and the high-temperature gas obtained by the second and second-level electric heating parts 25 is transported to the first high-temperature user (user 3 in the figure) via the high-temperature intermediate pipeline 27. Through the opening and cutting off effect of the 8-shaped blind plate 26 on the high-temperature intermediate pipeline 27 and the second high-temperature pipeline 25, the first and second electric heating parts 22 and the second high-temperature heating parts 25 can jointly supply high-temperature gas to the first high-temperature user (user 3 in the figure), and the first and second electric heating parts 22 and the second high-temperature user 25 can also supply high-temperature gas to the first high-temperature user (user 3 in the figure) and the second high-temperature user (user 4 in the figure) respectively.

[0101] like Figures 1 to 3 As shown, the finished product output branch 5 and the high-temperature pipeline 8 can be provided with rectifiers 28 respectively to rectify the medium-temperature gas and the high-temperature gas transported to the user. Step C 0 The rectifier 28 of the finished product output branch 5 of the medium temperature pipeline 4 is also included to rectify the medium temperature gas. Step E 1 The high temperature pipeline 8 also includes a rectifier 28 to rectify the high temperature gas. Step C 2 The high temperature pipeline 8 also includes a rectifier 28 for rectifying the high temperature gas.

[0102] like Figures 1 to 3 As shown, the low-temperature pipeline 2 and the low-temperature supplementary pipeline 7 can be connected to a high-pressure gas source, and the aforementioned low-temperature gas, medium-temperature gas, and high-temperature gas are all high-pressure gases. The first-stage electric heating unit 1 heats the low-temperature gas to obtain a medium-temperature gas of about 200°C to 600°C. The second-stage electric heating unit 3 heats the medium-temperature gas to obtain a high-temperature gas of about 600°C to 1000°C.

[0103] like Figures 1 to 3 As shown, each primary electric heating unit 1 may include multiple groups of primary electric heating groups 29 connected in parallel, and a switch valve 15 is set on the branch of each group of primary electric heating groups 29. By opening and closing the switch valve 15 on the branch of each group of primary electric heating groups 29, the low-temperature gas of the low-temperature pipeline 2 can be supplied to each group of primary electric heating groups 29 or all of them can be supplied to one group of primary electric heating groups 29. The operations of the multiple groups of primary electric heating groups 29 are independent of each other and can be operated separately. Each primary electric heating unit 1 may include two groups of primary electric heating groups 29.

[0104] like Figures 1 to 3 As shown, each first-level electric heating group 29 may include one or multiple first-level electric heaters 30 in parallel, and the operation of the first-level electric heaters 30 in each first-level electric heating group 29 is synchronous, and they are started and stopped at the same time, and do not operate separately. The first-level electric heating group 29 of the first first-level electric heating part 17 may include multiple first-level electric heaters 30, and the first first-level electric heating part 17 has a strong ability to heat low-temperature gas, and the low-pressure pipeline 2 connected to the first first-level electric heating part 17 is connected to a large-flow gas source. The first-level electric heating group 29 of the first first-level electric heating part 18 may include one first-level electric heater 30, and the first first-level electric heating part 18 has a weak ability to heat low-temperature gas, and the low-pressure pipeline 2 connected to the first first-level electric heating part 18 is connected to a small-flow gas source.

[0105] like Figure 1 and Figure 3As shown, each secondary electric heating section 3 may include one or more secondary electric heaters 31 connected in parallel, and the operation of the secondary electric heaters 31 in each secondary electric heating section 3 is synchronous, and they are started and stopped at the same time, and do not operate separately. The first secondary electric heating section 22 may include multiple secondary electric heaters 31. The second secondary electric heating section 23 may include one secondary electric heater 31. A switch valve 15 is set in the branch of each secondary electric heating section 3. By opening and closing the switch valve 15 on the branch of each secondary electric heating section 3, the medium-temperature gas of the heating output branch 6 can be supplied to each secondary electric heating section 3 or all of them can be supplied to one secondary electric heating section 3.

[0106] like Figure 4 As shown, the rectifier 28 includes rectifier orifice plates 32, 33, 34, and the rectifier orifice plates 32, 33, 34 are provided with honeycomb-shaped Figure 5 The hexagonal holes 35 shown in the figure have a height D of greater than 10 mm and less than 30 mm, a wall thickness m of greater than 2 mm and less than 10 mm, and a length L of greater than 10 mm and less than 300 mm. Figure 4 As shown, the rectifying orifice plates 32, 33, and 34 include a first rectifying orifice plate 32, a second rectifying orifice plate 33, and a third rectifying orifice plate 34. The gas flows through the first rectifying orifice plate 32, the second rectifying orifice plate 33, and the third rectifying orifice plate 34 in sequence. The first rectifying orifice plate 32 and the second rectifying orifice plate 33 make the airflow temperature uniform, and the third rectifying orifice plate 34 makes the airflow pressure uniform.

[0107] like Figure 6 As shown, the 8-shaped blind plate 26 can be made of high temperature resistant material, including a blind plate end 36 for cutting off the pipeline and a circular ring end 37 for opening the pipeline. The blind plate end 36 and the circular ring end 37 are connected at the edge to form an 8-shape.

[0108] like Figures 7 to 9 As shown, each of the multiple electric heaters connected in parallel is provided with the same intake duct 38 and exhaust duct 39. Exemplarily, the number of electric heaters is four. The electric heater can be a primary electric heater 30 or a secondary electric heater 31. The same multiple intake ducts 38 have the same flow length and are arranged symmetrically. The same multiple exhaust ducts 39 have the same flow length and are arranged symmetrically.

[0109] Although the present invention is disclosed as above by the embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention.

Claims

1. A gas heating device, characterized in that include: The first-stage electric heating unit heats the low-temperature gas to obtain the medium-temperature gas; A low-temperature pipeline is connected to the first-stage electric heating part and delivers low-temperature gas to the first-stage electric heating part; A secondary electric heating unit heats low-temperature gas and / or medium-temperature gas to obtain high-temperature gas; A medium-temperature pipeline is connected to the first-level electric heating unit, and is provided with a finished product output branch and a heating output branch. The finished product output branch delivers medium-temperature gas to medium-temperature users, and the heating output branch is connected to the second-level electric heating unit, and the heating output branch delivers medium-temperature gas to the second-level electric heating unit; a low-temperature supplementary pipeline, connected to the secondary electric heating part, and delivering low-temperature gas to the secondary electric heating part; and The high-temperature pipeline is connected to the secondary electric heating part to transport high-temperature gas to high-temperature users.

2. The gas heating device according to claim 1, characterized in that: The low-temperature pipeline and the low-temperature supplementary pipeline are respectively provided with a flow meter and an exhaust branch, the exhaust branch is connected to the exhaust silencer tower, the exhaust branch is provided with an exhaust valve, and the flow meter interlocks and controls the exhaust valve to discharge excess low-temperature gas.

3. The gas heating device according to claim 1, characterized in that: The low-temperature pipeline and the low-temperature supplementary pipeline are respectively provided with a coalescing deliquent device to dry the low-temperature gas.

4. The gas heating device according to claim 1, 2 or 3, characterized in that: The gas heating device is provided with a plurality of the first-level electric heating parts, and the gas heating device is provided with a plurality of the low-temperature pipes, each of the low-temperature pipes is connected to one of the first-level electric heating parts; The gas heating device is provided with a low-temperature intermediate pipeline, the low-temperature intermediate pipeline is connected with at least two low-temperature pipelines, and the low-temperature intermediate pipeline is provided with a switch valve and a regulating valve.

5. The gas heating device according to claim 4, characterized in that: The plurality of first-level electric heating parts include a first first-level electric heating part and a second first-level electric heating part, and the medium-temperature pipe includes a first medium-temperature pipe and a second medium-temperature pipe; The first primary electric heating unit is provided with the first medium-temperature pipe, the first medium-temperature pipe is provided with the heating output branch and the finished product output branch, and the heating output branch and the finished product output branch are provided with switch valves respectively; The second-stage electric heating unit is provided with the second medium-temperature pipe, the second medium-temperature pipe is provided with the finished product output branch, and the finished product output branch is provided with a switch valve; The gas heating device is provided with a medium-temperature intermediate pipeline, the medium-temperature intermediate pipeline is connected with the first medium-temperature pipeline and the second medium-temperature pipeline, and the medium-temperature intermediate pipeline is provided with a switch valve.

6. The gas heating device according to claim 5, characterized in that: The gas heating device is provided with a plurality of the secondary electric heating parts, the plurality of the secondary electric heating parts include a first secondary electric heating part and a second secondary electric heating part, and the first primary electric heating part is provided with the first secondary electric heating part and the second secondary electric heating part; The high-temperature pipeline includes a first high-temperature pipeline and a second high-temperature pipeline. The first-secondary electric heating part is configured with the first high-temperature pipeline, and the second-secondary electric heating part is configured with the second high-temperature pipeline.

7. The gas heating device according to claim 4, characterized in that: The plurality of first-level electric heating parts include a first first-level electric heating part and a second first-level electric heating part, and the medium-temperature pipe includes a first medium-temperature pipe and a second medium-temperature pipe; The first primary electric heating unit is provided with the first medium-temperature pipe, the first medium-temperature pipe is provided with the heating output branch and the finished product output branch, and the heating output branch and the finished product output branch are provided with switch valves respectively; The second first-level electric heating unit is configured with the second medium-temperature pipe, the second medium-temperature pipe is provided with the heating output branch and the finished product output branch, and the heating output branch and the finished product output branch are respectively provided with switch valves.

8. The gas heating device according to claim 7, characterized in that: The gas heating device is provided with a plurality of the secondary electric heating parts, the plurality of secondary electric heating parts include a first secondary electric heating part and a second secondary electric heating part, the first primary electric heating part is configured with the first secondary electric heating part, and the second primary electric heating part is configured with the second secondary electric heating part; The high-temperature pipeline includes a first high-temperature pipeline and a second high-temperature pipeline. The first-secondary electric heating part is configured with the first high-temperature pipeline, and the second-secondary electric heating part is configured with the second high-temperature pipeline.

9. The gas heating device according to claim 6 or 8, characterized in that: The gas heating device is provided with a high-temperature intermediate pipeline, the high-temperature intermediate pipeline is connected with the first high-temperature pipeline and the second high-temperature pipeline, the high-temperature intermediate pipeline is provided with an 8-shaped blind plate, and the second high-temperature pipeline is provided with an 8-shaped blind plate.

10. The gas heating device according to claim 1, characterized in that: The finished product output branch and the high-temperature pipeline are respectively provided with rectifiers.

11. The gas heating device according to claim 10, characterized in that: The rectifier comprises a rectifier orifice plate, wherein the rectifier orifice plate is provided with honeycomb hexagonal channels, wherein the height of each hexagonal channel is greater than 10 mm and less than 30 mm, the wall thickness of each hexagonal channel is greater than 2 mm and less than 10 mm, and the length of each hexagonal channel is greater than 10 mm and less than 300 mm; The rectifying orifice plate comprises a first rectifying orifice plate, a second rectifying orifice plate and a third rectifying orifice plate, and the gas flows through the first rectifying orifice plate, the second rectifying orifice plate and the third rectifying orifice plate in sequence, the first rectifying orifice plate and the second rectifying orifice plate are used to make the airflow temperature uniform, and the third rectifying orifice plate is used to make the airflow pressure uniform.

12. The gas heating device according to claim 1, characterized in that: The first-stage electric heating unit includes a plurality of first-stage electric heaters connected in parallel, and each of the first-stage electric heaters is provided with the same air intake duct and exhaust duct; The secondary electric heating unit includes a plurality of secondary electric heaters connected in parallel, and each of the secondary electric heaters is provided with the same air intake duct and exhaust duct.

13. A gas heating method, characterized in that include: Step A0. The cryogenic pipeline transports the cryogenic gas to the primary electric heating unit; Step B0. The first-level electric heating unit heats the low-temperature gas to obtain medium-temperature gas; Step C0. The medium-temperature pipeline transports the medium-temperature gas through the finished product output branch to the medium-temperature user; or, Step C1. The medium-temperature pipeline transports the medium-temperature gas through the heating output branch to the secondary electric heating unit, Step D1. The secondary electric heating unit heats the medium-temperature gas to obtain high-temperature gas, Step E1. The high-temperature pipeline transports the high-temperature gas to the high-temperature user; And / or, step A2. the low-temperature supplementary pipeline transports the low-temperature gas to the secondary electric heating unit, step B2. the secondary electric heating unit heats the low-temperature gas to obtain high-temperature gas, and step C2. the high-temperature pipeline transports the high-temperature gas to the high-temperature user.

14. The gas heating method according to claim 13, characterized in that: The step A0 also includes a flow meter of the cryogenic pipeline controlling an exhaust valve of an exhaust branch of the cryogenic pipeline to open, and the exhaust branch conveys excess cryogenic gas to an exhaust muffler tower for discharge; The step A2 also includes the flow meter of the low-temperature supplementary pipeline controlling the exhaust valve of the exhaust branch of the low-temperature supplementary pipeline to open, and the exhaust branch conveys excess low-temperature gas to the exhaust silencer tower for discharge.

15. The gas heating method according to claim 13, characterized in that: The step A0 also includes drying the low-temperature gas in a coalescing deliquifier of the low-temperature pipeline; The step A2 further comprises drying the low-temperature gas by a coalescing and deliquoring device in the low-temperature supplementary pipeline.

16. The gas heating method according to claim 13, 14 or 15, characterized in that: The step A0 further comprises: The switch valve of the low-temperature intermediate pipeline is opened, and the multiple low-temperature pipelines transport the low-temperature gas to a first-level electric heating part through the low-temperature intermediate pipeline; or, Close the switch valve of the low-temperature intermediate pipeline, and each low-temperature pipeline transports low-temperature gas to each first-level electric heating part.

17. The gas heating method according to claim 16, characterized in that: The step C0 also includes: Close the switch valve of the medium-temperature intermediate pipeline, close the switch valve of the heating output branch of the first medium-temperature pipeline of the first-level electric heating unit, open the switch valve of the finished product output branch of the first medium-temperature pipeline of the first-level electric heating unit, and deliver the medium-temperature gas to the first medium-temperature user; open the switch valve of the finished product output branch of the second medium-temperature pipeline of the second-level electric heating unit, and deliver the medium-temperature gas to the second medium-temperature user; or, Open the switch valve of the medium-temperature intermediate pipeline, close the switch valve of the heating output branch of the first medium-temperature pipeline of the first-level electric heating unit, open the switch valve of the finished product output branch of the first medium-temperature pipeline of the first-level electric heating unit, and transport the medium-temperature gas to the first medium-temperature user, close the switch valve of the finished product output branch of the second medium-temperature pipeline of the second-level electric heating unit, and transport the medium-temperature gas to the first medium-temperature user via the medium-temperature intermediate pipeline.

18. The gas heating method according to claim 17, characterized in that: The step C1 further comprises: Open the switch valve of the heating output branch of the first medium-temperature pipeline of the first primary electric heating part to transport the medium-temperature gas to the first secondary electric heating part and the second secondary electric heating part.

19. The gas heating method according to claim 16, characterized in that: The step C0 also includes: Close the switch valve of the heating output branch of the first medium-temperature pipeline of the first-level electric heating unit, open the switch valve of the finished product output branch of the first medium-temperature pipeline of the first-level electric heating unit, and deliver the medium-temperature gas to the first medium-temperature user; close the switch valve of the heating output branch of the second medium-temperature pipeline of the second-level electric heating unit, open the switch valve of the finished product output branch of the second medium-temperature pipeline of the second-level electric heating unit, and deliver the medium-temperature gas to the second medium-temperature user.

20. The gas heating method according to claim 19, characterized in that: The step C1 further comprises: Open the switch valve of the heating output branch of the first medium-temperature pipe of the first-level electric heating part to transport the medium-temperature gas to the first-level electric heating part, open the switch valve of the heating output branch of the second medium-temperature pipe of the second-level electric heating part to transport the medium-temperature gas to the second-level electric heating part.

21. The gas heating method according to claim 18 or 20, characterized in that: The step E1 and step C2 also include: The first high-temperature pipeline transports the high-temperature gas obtained by the first and second-level electric heating parts to the first high-temperature user, the 8-shaped blind plate of the high-temperature intermediate pipeline cuts off the high-temperature intermediate pipeline, the 8-shaped blind plate of the second high-temperature pipeline opens the second high-temperature pipeline, and the second high-temperature pipeline transports the high-temperature gas obtained by the second and second-level electric heating parts to the second high-temperature user; or, The first high-temperature pipeline transports the high-temperature gas obtained from the first and second-level electric heating parts to the first high-temperature user, the 8-shaped blind plate of the second high-temperature pipeline cuts off the second high-temperature pipeline, the 8-shaped blind plate of the high-temperature intermediate pipeline opens the high-temperature intermediate pipeline, and the high-temperature gas obtained from the second and second-level electric heating parts is transported to the first high-temperature user through the high-temperature intermediate pipeline.

22. The gas heating method according to claim 13, characterized in that: The step C0 further includes a rectifier of the finished product output branch of the medium temperature pipeline rectifying the medium temperature gas; The step E1 further includes a rectifier of the high temperature pipeline rectifying the high temperature gas; The step C2 further includes a rectifier of the high-temperature pipeline rectifying the high-temperature gas.

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