Natural gas preparation equipment

Abstract

The present invention provides natural gas preparation equipment, and relates to the technical field of natural gas preparation, the natural gas preparation equipment comprises: a feeding device, the feeding device is used for pneumatic feeding of hydrocarbon generation reaction materials, and the conveying gas of the pneumatic feeding is natural gas; the reactor comprises a shell, a closed reaction chamber is arranged in the shell, the shell is provided with a material steam inlet, a hydrocarbon generation reaction material inlet and a product outlet which are communicated with the reaction chamber, the material steam inlet is used for inputting material steam, and the product outlet is used for outputting hydrocarbon generation reaction materials. The hydrocarbon generation reaction material inlet is connected with the feeding device through a pneumatic conveying pipe, and the material steam inlet is connected with a material steam supply device; the heating part is used for heating the reaction chamber; a traditional coal-to-natural gas technical means is overturned, the natural gas preparation process is environmentally friendly, the process is simple, operation is easy, and the gas preparation efficiency and effect are good.

Description

Technical Field

[0001] The present invention belongs to the technical field of natural gas preparation, and more specifically, relates to a natural gas preparation device. Background Art

[0002] Innovative energy conversion technologies tailored to local conditions to achieve clean and efficient use of coal from the root are technical issues that need to be addressed. Summary of the invention

[0003] The purpose of the present invention is to provide a natural gas preparation device, which subverts the traditional coal-to-natural gas technical means, and the process of preparing natural gas is environmentally friendly, simple in process, easy to operate, and has good gas production efficiency and effect.

[0004] In order to achieve the above object, the present invention provides a natural gas preparation device, comprising:

[0005] A feeding device, the feeding device is used for pneumatic feeding of hydrocarbon generation reaction materials, and the conveying gas of the pneumatic feeding is natural gas;

[0006] A reactor, wherein the reactor comprises a shell, a sealed reaction chamber is arranged in the shell, the shell is provided with a material steam inlet, a hydrocarbon generation reaction material inlet and an output outlet which are communicated with the reaction chamber, the material steam inlet is used to input material steam, the hydrocarbon generation reaction material inlet is connected to the feeding device through a pneumatic conveying pipe, and the material steam inlet is connected to a material steam supply device;

[0007] A heating component is used to heat the reaction chamber.

[0008] Optionally, the hydrocarbon generation reaction material includes coal of a set mesh size, and the feeding device includes a storage barrel, the upper and lower ends of the storage barrel are respectively provided with a feeding port and a discharge port, a rotating discharge mechanism is provided below the discharge port, and the lower end of the rotating discharge mechanism is provided with the pneumatic conveying pipe, and the pneumatic conveying pipe is connected to the rotating discharge mechanism through an opening.

[0009] Optionally, the rotary unloading mechanism comprises a rotating disk, a plurality of material storage troughs are arranged on the outer circumference of the rotating disk, and an electrostatic adsorption belt is arranged at the bottom of the material storage trough.

[0010] Optionally, the material steam is water vapor at a first set temperature.

[0011] Optionally, the reaction chamber is filled with a natural gas atmosphere with an oxygen content of no more than 1%, the pressure in the reaction chamber is 0.1-2 MPa, and the temperature in the reaction chamber is 500° C.-1500° C.

[0012] Optionally, the reactor comprises a plurality of reaction tubes, a plurality of transverse connecting tubes and a plurality of vertical connecting tubes, the axes of the plurality of reaction tubes are parallel to each other and are arranged in two rows at intervals, the reaction tubes in the two rows are arranged in pairs, and the first end of each pair of the reaction tubes is connected by a transverse connecting tube, the plurality of vertical connecting tubes are arranged in two rows at the second ends of the reaction tubes, and each vertical connecting tube connects two reaction tubes, and the plurality of reaction tubes are connected by the plurality of transverse connecting tubes and the plurality of vertical connecting tubes to form a serpentine reaction chamber, the topmost reaction tube in the first row of reaction tubes is provided with a confluence component, the material steam inlet and the hydrocarbon generation reaction material inlet are provided in the confluence component, and the bottommost reaction tube is provided with the output outlet.

[0013] Optionally, it also includes a material steam distribution component, which includes an inner tube and an outer tube arranged vertically, the inner tube is connected to the material steam supply device through a conveying pipe, the inner tube is provided with a distribution hole, the outer tube is sleeved on the outside of the inner tube and is connected to the inner tube through the distribution hole, the outer tube is connected to a plurality of branch pipes, one of the branch pipes is connected to the material steam inlet on the confluence component, and the remaining branch pipes are respectively connected to each of the vertical connecting pipes connected to the first row of reaction tubes.

[0014] Optionally, an annular distribution component is provided on the outer side of each of the vertical connecting tubes connected to the first row of reaction tubes, and an annular distribution chamber is formed between the distribution component and the vertical connecting tubes. The vertical connecting tubes serving as the cavity wall of the distribution chamber are provided with a slit-shaped steam inlet along their circumference, so that the distribution chamber is connected to the vertical connecting tubes through the steam inlet, and the branch pipe is connected to the distribution component.

[0015] Optionally, it also includes a first heat exchanger, a dust collector, a gas-solid-liquid separator, a desulfurizer and a second heat exchanger, wherein the first heat exchanger is connected to the output outlet, and the dust collector, the gas-solid-liquid separator, the desulfurizer and the second heat exchanger are sequentially connected downstream of the first heat exchanger.

[0016] Optionally, the output end of the second heat exchanger is connected to a natural gas output pipe, and the natural gas output pipe is connected to the pneumatic transmission pipe.

[0017] Optionally, a methane catalytic device is further included, and the methane catalytic device is connected downstream of the second heat exchanger.

[0018] The present invention provides a natural gas preparation device, which has the following beneficial effects: the natural gas preparation device feeds hydrocarbon generation reaction materials to the hydrocarbon generation reaction material inlet of the reactor through a feeding device, uses natural gas as a conveying gas for pneumatic feeding during the feeding process, and simultaneously inputs material steam into the reactor from the material steam inlet, and under the heating action of a heating component, causes a ripening pyrolysis hydrocarbon generation reaction to occur in the reactor, utilizing the hydrocarbon generation reaction of the material coal, and natural gas is a reaction product, thereby realizing the preparation of natural gas; the natural gas preparation device is completely different from the currently existing coal gasification and methanation catalytic natural gas production technology in the world. The technology is used, and the natural gas prepared by the natural gas preparation equipment has the characteristics of not adding oxygen to participate in coal gasification and not adding hydrogen to participate in carbon reaction. The preparation of natural gas by the natural gas preparation equipment is a derivative technology based on the research on the formation mechanism of coalbed methane, which subverts the traditional coal-to-natural gas technology concept. Its gas production mechanism is the coalbed methane derivative process in which surface organic matter is buried by crustal changes and undergoes a long period of time, gradually decomposes to generate hydrocarbons, mudifies to generate hydrocarbons, and coalifies to generate hydrocarbons. When the natural gas preparation equipment is used to prepare natural gas, another clean coal in the reaction product, that is, the hydrocarbon generation reaction material after use, is still a clean fuel with great economic value.

[0019] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0021] Figure 1 The figure shows an overall structural diagram of a natural gas preparation device according to an embodiment of the present invention.

[0022] Figure 2 A schematic structural diagram of a feeding device of a natural gas preparation equipment according to an embodiment of the present invention is shown.

[0023] Figure 3 The figure shows the overall structure of a reactor of a natural gas preparation device according to an embodiment of the present invention.

[0024] Figure 4 A first cross-sectional structural schematic diagram of a reactor of a natural gas preparation device according to an embodiment of the present invention is shown.

[0025] Figure 5 A second cross-sectional structural schematic diagram of a reactor of a natural gas preparation device according to an embodiment of the present invention is shown.

[0026] Figure 6 A schematic structural diagram of a post-reaction processing component of a natural gas preparation device according to an embodiment of the present invention is shown.

[0027] Figure 7 A schematic structural diagram of a dust collector for natural gas preparation equipment according to an embodiment of the present invention is shown.

[0028] Figure 8 A schematic structural diagram of a gas-solid-liquid separator of a natural gas preparation device according to an embodiment of the present invention is shown.

[0029] Description of reference numerals:

[0030] 1. Feeding device; 2. Reactor; 3. Material steam inlet; 4. Hydrocarbon generation reaction material inlet; 5. Output outlet; 6. Pneumatic conveying pipe; 7. Material steam supply device; 8. Heating component; 9. Storage barrel; 10. Rotary unloading mechanism; 11. Brush; 12. Baffle plate; 13. Reaction tube; 14. Horizontal connecting tube; 15. Vertical connecting tube; 16. Converging component; 17. Temperature measuring tube; 18. Inner tube; 19. Outer tube; 20. Distribution hole; 21. Branch pipe ; 22. Distribution component; 23. Steam inlet; 24. Dust collector; 25. Desulfurizer; 26. Natural gas output pipe; 27. Methane catalytic device; 28. Gas-to-gas heat exchanger; 29. ​​First gas-to-water heat exchanger; 30. Second gas-to-water heat exchanger; 31. Third gas-to-water heat exchanger; 32. Cooling water inlet; 33. Cooling water outlet; 34. First output pipe; 35. Dehydration tank; 36. Dust collector; 37. Second output pipe; 38. Third output pipe; 39. Output inlet. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0032] like Figure 1 As shown, the present invention provides a natural gas preparation device, comprising:

[0033] Feeding device 1, feeding device 1 is used for pneumatic feeding of hydrocarbon generation reaction materials, and the conveying gas of pneumatic feeding is natural gas;

[0034] Reactor 2, the reactor 2 comprises a shell, a sealed reaction chamber is arranged in the shell, a material steam inlet 3, a hydrocarbon generation reaction material inlet 4 and an output outlet 5 are arranged in the shell and are communicated with the reaction chamber, the material steam inlet 3 is used to input material steam, the hydrocarbon generation reaction material inlet 4 is connected to the feeding device 1 through a pneumatic conveying pipe 6, and the material steam inlet 3 is connected to the material steam supply device 7;

[0035] The heating component 8 is used to heat the reaction chamber.

[0036] Specifically, the natural gas preparation equipment feeds hydrocarbon generation reaction materials to the hydrocarbon generation reaction material inlet 4 of the reactor 2 through the feeding device 1. During the feeding process, natural gas is used as the conveying gas for pneumatic feeding. At the same time, material steam is input into the reactor 2 from the material steam inlet 3. Under the heating action of the heating component 8, a ripening pyrolysis hydrocarbon generation reaction occurs in the reactor 2. The hydrocarbon generation reaction of the material coal is utilized, and natural gas is a reaction product, thereby realizing the preparation of natural gas. The natural gas preparation equipment is completely different from the existing international coal gasification and methanation catalytic natural gas production technology, and through The natural gas preparation equipment prepares natural gas, which has the characteristics of not adding oxygen to participate in coal gasification and not adding hydrogen to participate in carbon reaction. The natural gas preparation equipment is a derivative technology based on the research on the formation mechanism of coalbed methane, which subverts the traditional coal-to-natural gas technology concept. Its gas production mechanism is a coalbed methane derivative process in which surface organic matter is buried by crustal changes and undergoes a long period of time, gradually decomposes to generate hydrocarbons, mudifies to generate hydrocarbons, and coalifies to generate hydrocarbons. While the natural gas preparation equipment prepares natural gas, another clean coal in the reaction product, that is, the used hydrocarbon generation reaction material, is still a clean fuel with great economic value.

[0037] Furthermore, the hydrocarbon generation reaction materials and the material steam enter the reactor 2 simultaneously, and a ripening pyrolysis hydrocarbon generation reaction is performed in the reaction chamber.

[0038] In this embodiment, a portion of the produced natural gas is used as transport gas.

[0039] In this embodiment, the material steam supply device 7 is a high-temperature steam generating device.

[0040] Optionally, the hydrocarbon generation reaction material includes coal of a set mesh size, and the feeding device 1 includes a storage barrel 9, the upper and lower ends of the storage barrel 9 are respectively provided with a feeding port and a discharge port, a rotating discharge mechanism 10 is provided below the discharge port, and a pneumatic conveying pipe 6 is provided at the lower end of the rotating discharge mechanism 10, and the pneumatic conveying pipe 6 is connected to the rotating discharge mechanism 10 through an opening.

[0041] Specifically, the coal particles should not be too large to facilitate the blowing of the conveying gas and mixing with the catalyst; the hydrocarbon generation reaction materials are added into the storage barrel 9 through the feeding port for storage, and the feeding is accurately achieved by rotating the feeding mechanism 10 to control the feeding amount of the hydrocarbon generation reaction materials. At the same time, the discharged hydrocarbon generation reaction materials enter the pneumatic conveying pipe 6 through the opening, and the conveying gas flowing in the pneumatic conveying pipe 6 conveys the hydrocarbon generation reaction materials to the reactor 2.

[0042] In this embodiment, the mesh size is set to 50-200 meshes.

[0043] In this embodiment, if Figure 2 As shown, a conical section is provided at the lower end of the storage barrel 9, and a pair of rotatable brushes 11 are provided below the conical section. The setting of the brushes 11 can reduce the material stacking density and thus reduce the pressure of the rotary feeding device. A pair of baffle plates 12 are provided below the pair of brushes 11, and a feeding port is formed between the pair of baffle plates 12. A rotary feeding mechanism 10 is provided below the feeding port. The rotary feeding mechanism 10 includes a rotating disk, and a plurality of storage troughs are provided on the outer periphery of the rotating disk. The hydrocarbon generation reaction materials passing through the feeding port can enter the storage trough, and as the rotating disk rotates, the materials in each storage trough successively enter the pneumatic conveying pipe 6.

[0044] Optionally, the rotary unloading mechanism 10 includes a rotating disk, a plurality of material storage troughs are arranged on the periphery of the rotating disk, and an electrostatic adsorption belt is arranged at the bottom of the material storage trough.

[0045] In another embodiment, an electrostatic adsorption belt may be installed in the storage tank to electrostatically adsorb the hydrocarbon generation reaction materials in the storage tank. When the storage tank is turned to the open position, the static electricity is eliminated, allowing the hydrocarbon generation reaction materials to fall into the pneumatic conveying pipe 6, thereby achieving more accurate material discharge.

[0046] Optionally, the material steam is water vapor at a first set temperature.

[0047] Specifically, the first set temperature is 300°C-1200°C.

[0048] Preferably, the first set temperature is 700-1200°C.

[0049] Further, the first set temperature may be any value of 700° C., 800° C., 900° C., 1000° C., 1100° C., 1200° C., or a range between any two values.

[0050] Optionally, the reaction chamber is filled with natural gas atmosphere with an oxygen content of no more than 1%, the pressure in the reaction chamber is 0.1-2 MPa, and the temperature in the reaction chamber is 500° C.-1500° C.

[0051] Specifically, an oxygen-poor, high-temperature, and pressurized reaction chamber state is formed in the reactor 2 .

[0052] In this embodiment, the reactor 2 is a fluidized bed reactor 2 .

[0053] Preferably, the pressure in the reaction chamber is 0.1-1.5 MPa.

[0054] Furthermore, the pressure in the reaction chamber may be any value among 0.1, 0.3, 0.5, 0.7, 0.9, 1.0, 1.2, 1.5 MPa or a range between any two values.

[0055] Preferably, the temperature in the reaction chamber is 700°C to 1200°C.

[0056] Further, the temperature in the reaction chamber may be any value of 700° C., 800° C., 900° C., 1000° C., 1100° C., 1200° C., or a range between any two values.

[0057] Optionally, the mass ratio of hydrocarbon generation reaction material to material steam is 1:0.5-1:10.

[0058] Preferably, the mass ratio of hydrocarbon generation reaction material to material steam is 1:0.5-1:5.

[0059] Furthermore, the mass ratio of the hydrocarbon generation reaction material to the material steam may be any value among 1:0.5, 1:1.5, 1:2, 1:2.5, 1:3, 1:5 or a range value between any two values.

[0060] Specifically, the high-temperature water vapor serves as a ripening agent, a pyrolysis agent, and a catalytic aid for hydrocarbon generation reactions.

[0061] Optionally, the reaction time of the ripening pyrolysis hydrocarbon generation reaction is 5s-100s.

[0062] Preferably, the reaction time of the ripening pyrolysis hydrocarbon generation reaction is 5 to 90 seconds.

[0063] Optionally, the reactor 2 includes a plurality of reaction tubes 13, a plurality of transverse connecting tubes 14 and a plurality of vertical connecting tubes 15, the reaction tubes 13 serving as the shell of the reactor 2, the axes of the plurality of reaction tubes 13 being parallel to each other and arranged in two rows at intervals, the two rows of reaction tubes 13 being arranged in pairs, and the first end of each pair of reaction tubes 13 being connected by a transverse connecting tube 14, the plurality of vertical connecting tubes 15 being arranged in two rows at the second ends of the reaction tubes 13, and each vertical connecting tube 15 connecting two reaction tubes 13, the plurality of reaction tubes 13 being connected by the plurality of transverse connecting tubes 14 and the plurality of vertical connecting tubes 15 to form a serpentine reaction chamber, the topmost reaction tube 13 in the first row of reaction tubes 13 being provided with a confluence component 16, the confluence component 16 being provided with a material steam inlet 3 and a hydrocarbon generation reaction material inlet 4, and the bottommost reaction tube 13 being provided with an output outlet 5.

[0064] Specifically, Figures 3 to 5 As shown, each row of reaction tubes 13 includes a plurality of reaction tubes 13 arranged vertically at intervals, two rows of reaction tubes 13 are connected by a transverse connecting tube 14, and two adjacent reaction tubes 13 in the same row of reaction tubes 13 are connected by a vertical connecting tube 15, except for the reaction tube 13 connected to the confluence component 16 and the output outlet 5; the reaction chamber formed by connecting the plurality of reaction tubes 13, the plurality of transverse tubes and the plurality of vertical tubes is serpentine, and the hydrocarbon generation reaction material forms a serpentine flow path in the reaction chamber to ensure the length of the reaction path and the reaction time; the setting of the confluence component 16 enables the material steam and the hydrocarbon generation reaction material to enter the reaction chamber at the same time in a confluence manner, and flow along the reaction chamber until the reaction is completed and flows out from the output outlet 5.

[0065] In this embodiment, a heating component 8 is provided on the outside of the reactor 2, and the reactor 2 can be embedded in the heating component 8 and heated by the heating component 8 to ensure the reaction temperature; a plurality of temperature measuring tubes 17 are vertically spaced on the reactor 2 for measuring the temperature in the reaction chamber to facilitate temperature control.

[0066] Optionally, it also includes a material steam distribution component 22, which includes an inner tube 18 and an outer tube 19 arranged vertically, the inner tube 18 is connected to the material steam supply device 7 through a conveying pipe, the inner tube 18 is provided with a distribution hole 20, the outer tube 19 is sleeved on the outside of the inner tube 18 and is connected to the inner tube 18 through the distribution hole 20, the outer tube 19 is connected to a plurality of branch pipes 21, one of the branch pipes 21 is connected to the material steam inlet 3 on the confluence component 16, and the remaining branch pipes 21 are respectively connected to each vertical connecting pipe 15 connected to the first row of reaction tubes 13.

[0067] Specifically, in addition to entering the reaction chamber through the confluence component 16, the material vapor also enters the reaction chamber in sequence through multiple branch pipes 21 and the vertical connecting pipe 15 along the reaction path. Figure 5 As shown, the material vapor first enters the inner tube 18, and then enters the outer tube 19 through multiple distribution holes 20 to achieve the first distribution. Thereafter, the material vapor evenly enters multiple branch pipes 21. The material vapor in one branch pipe 21 enters the confluence component 16, and the material vapor in the remaining branch pipes 21 respectively enters each vertical connecting pipe 15 connected to the first row of reaction tubes 13, and enters the reaction chamber in sequence multiple times along the reaction path to improve the reaction effect.

[0068] Optionally, an annular distribution component 22 is provided on the outer side of each vertical connecting tube 15 connected to the first row of reaction tubes 13, and an annular distribution chamber is formed between the distribution component 22 and the vertical connecting tube 15. The vertical connecting tube 15 serving as the cavity wall of the distribution chamber is provided with a slit-shaped steam inlet 23 along its circumference, so that the distribution chamber is connected to the vertical connecting tube 15 through the steam inlet 23, and the branch pipe 21 is connected to the distribution component 22.

[0069] Specifically, Figure 5 As shown, the distribution component 22 forms an annular distribution chamber on the outer periphery of the vertical connecting pipe 15, and the distribution chamber can be used to evenly distribute the material vapor transported by the branch pipe 21, and at the same time enter the vertical connecting pipe 15 in a curtain-like manner through the annular and slit-shaped steam inlet 23. Then, the hydrocarbon generation reaction material flowing along the axial direction in the vertical connecting pipe 15 can flow in a state of a steam curtain formed basically vertically with the material vapor, and can be fully mixed and contacted with the material vapor, thereby further improving the reaction effect.

[0070] Optionally, it also includes a first heat exchanger, a dust collector 24, a gas-solid-liquid separator, a desulfurizer 25 and a second heat exchanger, the first heat exchanger is connected to the output outlet 5, and the dust collector 24, the gas-solid-liquid separator, the desulfurizer 25 and the second heat exchanger are sequentially connected downstream of the first heat exchanger.

[0071] Specifically, the ripening pyrolysis hydrocarbon generation reaction produces clean coal while producing natural gas. The output of the ripening pyrolysis hydrocarbon generation reaction passes through the first heat exchanger, the dust collector 24, the gas-solid-liquid separator, the desulfurizer 25 and the second heat exchanger in sequence through the output inlet 39. The dust is removed in the dust collector 24 and the clean coal is output. After passing through the gas-solid-liquid separator and desulfurization and heat exchange, natural gas is output.

[0072] Optionally, the output end of the second heat exchanger is connected to a natural gas output pipe 26 , and the natural gas output pipe 26 is connected to a pneumatic transmission pipe 6 .

[0073] Specifically, a portion of the natural gas is input into the pneumatic transmission pipe 6 as transmission gas.

[0074] Optionally, a methane catalytic device 27 is further included, and the methane catalytic device 27 is connected downstream of the second heat exchanger.

[0075] Specifically, due to the different types of coal used to produce hydrocarbon generation reaction materials, the methane content in the natural gas produced by the reaction in the reactor 2 is different. The natural gas preparation equipment can also be equipped with a methane catalytic device 27 according to the purpose of use (LNG production) to further increase the methane content and reduce the LNG production cost.

[0076] Further, such as Figure 6 As shown, the first heat exchanger, the dust collector 24, the gas-solid-liquid separator, the desulfurizer 25, the second heat exchanger and the methane catalytic device 27 form a post-reaction processing component, which cools the output of the reactor 2 for heat exchange, dust removal, gas-solid-liquid separation, desulfurization, cooling and heat exchange, and secondary catalysis to obtain pure natural gas and clean coal.

[0077] In this embodiment, if Figure 6 As shown, the first heat exchanger includes an air-to-air heat exchanger 28 and a first air-to-water heat exchanger 29, which are arranged in a two-stage heat exchange layout. The second heat exchanger includes a second air-to-water heat exchanger 30 and a third air-to-water heat exchanger 31, which are arranged in a two-stage heat exchange layout. In order to facilitate the spatial arrangement of the heat exchangers, the second heat exchanger is arranged between the air-to-air heat exchanger 28 and the first air-to-water heat exchanger 29; the three air-to-water heat exchangers are respectively provided with a cooling water inlet pipe and a cooling water outlet pipe, and the cooling water inlet pipe and the cooling water outlet pipe are respectively merged to form a cooling water inlet 32 ​​and a cooling water outlet 33; the output end of the first air-to-water heat exchanger 29 is connected to a first output pipe 34, and the first output pipe 34 is connected to the cooling water outlet 33 as shown in FIG. Figure 7 The dust collector 24 is connected to the output end of the dust collector 24. Figure 8 The gas-solid-liquid separator shown is connected, and the gas-solid-liquid separator includes a dehydration tank 35 and a dust removal tank 36. The output end of the gas-solid-liquid separator is connected to the desulfurizer 25. The output end of the desulfurizer 25 is connected to the second gas-water heat exchanger 30 through a second output pipe 37. The output end of the third gas-water heat exchanger 31 is connected to the methane catalytic device 27 through a third output pipe 38. The output end of the methane catalytic device 27 is connected to the natural gas output pipe 26.

[0078] In summary, when the natural gas preparation equipment provided by the present invention is used, taking the preparation of natural gas once as an example: the hydrocarbon generation reaction material and the material steam are respectively fed into the reactor 2 at the same time by the feeding device 1 and the material steam supply device 7, and under the heating action of the heating component 8, a ripening pyrolysis and hydrocarbon generation reaction occurs in the reactor 2; the reaction chamber is oxygen-deficient, the temperature is 700-1200°C, and the pressure is 0.1-1.5Mpa; after the reaction, the reaction gas output outlet 5 outputs the output, and then after cooling and heat exchange, dust removal, gas-solid-liquid separation, desulfurization, cooling and heat exchange and other processes, a pure natural gas product and clean coal with more economic value are obtained, and part of the natural gas is used as a conveying gas to convey the hydrocarbon generation reaction material. The natural gas preparation equipment is environmentally friendly, simple in process, easy to operate, and has high processing efficiency, and can obtain high-purity natural gas; during the preparation process, it has high energy efficiency, low energy consumption, high methane output rate, significant energy-saving effect, small equipment footprint, low one-time investment cost, wide applicability, and easy promotion and use; in addition, the operating steps are simple, the process is short, and the pollution is small. It is an advanced energy conversion technology for realizing efficient and clean cascade utilization of coal.

[0079] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A natural gas preparation device, characterized in that: include: A feeding device, the feeding device is used for pneumatic feeding of hydrocarbon generation reaction materials, and the conveying gas of the pneumatic feeding is natural gas; A reactor, wherein the reactor comprises a shell, a sealed reaction chamber is arranged in the shell, the shell is provided with a material steam inlet, a hydrocarbon generation reaction material inlet and an output outlet which are communicated with the reaction chamber, the material steam inlet is used to input material steam, the hydrocarbon generation reaction material inlet is connected to the feeding device through a pneumatic conveying pipe, and the material steam inlet is connected to a material steam supply device; A heating component is used to heat the reaction chamber.

2. The natural gas preparation equipment according to claim 1, characterized in that: The hydrocarbon generation reaction material includes coal of a set mesh size, and the feeding device includes a storage barrel. The upper and lower ends of the storage barrel are respectively provided with a feeding port and a discharge port, and a rotating discharge mechanism is provided below the discharge port. The lower end of the rotating discharge mechanism is provided with the pneumatic conveying pipe, and the pneumatic conveying pipe is connected to the rotating discharge mechanism through an opening.

3. The natural gas preparation equipment according to claim 2, characterized in that: The rotary unloading mechanism comprises a rotating disk, a plurality of material storage slots are arranged on the outer circumference of the rotating disk, and an electrostatic adsorption belt is arranged at the bottom of the material storage slots.

4. The natural gas preparation equipment according to claim 1, characterized in that: The reaction chamber is filled with natural gas atmosphere, and the oxygen content is not greater than 1%. The pressure in the reaction chamber is 0.1-2Mpa, and the temperature in the reaction chamber is 500°C-1500°C.

5. The natural gas preparation equipment according to claim 1, characterized in that: The reactor comprises a plurality of reaction tubes, a plurality of transverse connecting tubes and a plurality of vertical connecting tubes, the axes of the plurality of reaction tubes are parallel to each other and are arranged in two rows at intervals, the reaction tubes in the two rows are arranged in pairs, and the first ends of each pair of the reaction tubes are connected by a transverse connecting tube, the plurality of vertical connecting tubes are arranged in two rows at the second ends of the reaction tubes, and each vertical connecting tube connects two reaction tubes, and the plurality of reaction tubes are connected by the plurality of transverse connecting tubes and the plurality of vertical connecting tubes to form a serpentine reaction chamber, the topmost reaction tube in the first row of reaction tubes is provided with a confluence component, the confluence component is provided with the material steam inlet and the hydrocarbon generation reaction material inlet, and the bottommost reaction tube is provided with the output outlet.

6. The natural gas preparation equipment according to claim 5, characterized in that: It also includes a material steam distribution component, which includes an inner tube and an outer tube arranged vertically, the inner tube is connected to the material steam supply device through a conveying pipe, the inner tube is provided with a distribution hole, the outer tube is sleeved on the outside of the inner tube and communicated with the inner tube through the distribution hole, the outer tube is connected to a plurality of branch pipes, one of the branch pipes is connected to the material steam inlet on the confluence component, and the remaining branch pipes are respectively connected to each of the vertical connecting pipes connected to the first row of reaction tubes.

7. The natural gas preparation equipment according to claim 6, characterized in that: An annular distribution component is arranged on the outer side of each of the vertical connecting tubes connected to the first row of reaction tubes, and an annular distribution chamber is formed between the distribution component and the vertical connecting tube. The vertical connecting tube serving as the cavity wall of the distribution chamber is provided with a slit-shaped steam inlet along its circumference, so that the distribution chamber is connected with the vertical connecting tube through the steam inlet, and the branch pipe is connected to the distribution component.

8. The natural gas preparation equipment according to claim 1, characterized in that: It also includes a first heat exchanger, a dust collector, a gas-solid-liquid separator, a desulfurizer and a second heat exchanger, wherein the first heat exchanger is connected to the output outlet, and the dust collector, the gas-solid-liquid separator, the desulfurizer and the second heat exchanger are sequentially connected downstream of the first heat exchanger.

9. The natural gas preparation equipment according to claim 8, characterized in that: The output end of the second heat exchanger is connected to a natural gas output pipe, and the natural gas output pipe is connected to the pneumatic transmission pipe.

10. The natural gas preparation equipment according to claim 8, characterized in that: The invention also includes a methane catalytic device, which is connected downstream of the second heat exchanger.

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