Hydrogen production reformer

Abstract

The utility model discloses a hydrogen production reforming furnace which comprises a furnace body, a combustor and a plurality of reforming pipes, the burner is arranged in the furnace body, and the burner is used for burning in the furnace body so as to heat the conversion pipe; the multiple conversion pipes are arranged at intervals in the first direction, the conversion pipes penetrate through the furnace body in the vertical direction, the lower ends of the conversion pipes are fixedly connected with the furnace body, and each conversion pipe is filled with a catalyst; wherein a lifting appliance is arranged between every two adjacent conversion pipes, each lifting appliance comprises a lifting frame and a connecting piece, each lifting frame is used for being connected with a furnace top steel structure, the middle of each connecting piece is rotationally installed at the lower end of the corresponding lifting frame in the second direction, and the two ends of each connecting piece are connected with the upper ends of the corresponding two adjacent conversion pipes respectively. According to the device, upward pulling force can be increased for the two conversion pipes at the same time, the number of the hanging brackets is reduced, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen production from natural gas, and particularly relates to a hydrogen production reforming furnace. Background Art

[0002] The main component of natural gas is methane (CH4), which is the compound with the largest mass ratio of hydrogen atoms among various compounds, and the hydrogen storage capacity is 25%. At the same time, natural gas is one of the three major fossil energy sources on the earth and has huge reserves. Therefore, it has long developed into the most mainstream hydrogen production technology in industry. Due to the stable chemical structure of methane, steam, which is cheap and easily available, is often used in industry to react with methane to first generate syngas rich in hydrogen, and then hydrogen is prepared through chemical conversion and separation. Among them, the reforming furnace is the key equipment for hydrogen production from natural gas and also the equipment with the largest investment.

[0003] CN218561116U discloses a modular reforming furnace for a hydrogen production device, which includes a radiant section module and a convection section module. The radiant section module includes a plurality of vertical modules arranged along the height direction of the radiant section. Each of the vertical modules is fixedly connected and installed on a first steel structure; the convection section module includes a plurality of horizontal modules arranged along the length direction of the convection section. Each of the horizontal modules is fixedly connected and installed on a second steel structure.

[0004] However, in the above-mentioned prior art, each reforming tube is equipped with a spring hanger, resulting in a large number of spring hangers and high costs. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the above-mentioned technical deficiencies, and propose a hydrogen production reforming furnace to solve the technical problem that in the prior art, each reforming tube is equipped with a spring hanger, resulting in a large number of spring hangers and high costs.

[0006] To achieve the above technical purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides a hydrogen production reforming furnace, including:

[0008] A furnace body;

[0009] A burner, arranged on the furnace body; and

[0010] A plurality of reforming tubes, arranged at intervals along a first direction, the reforming tubes penetrate through the furnace body in the vertical direction and their lower ends are fixedly connected to the furnace body;

[0011] Wherein, a spreader is provided between two adjacent conversion tubes. The spreader includes a suspension bracket and a connecting member. The suspension bracket is used for connecting with the steel structure of the furnace top. The middle part of the connecting member is rotatably installed at the lower end of the suspension bracket along a second direction. The two ends of the connecting member are respectively connected with the upper ends of two adjacent conversion tubes. The first direction is perpendicular to the second direction.

[0012] In some embodiments, connecting columns are respectively provided on the opposite sides of the upper end of the conversion tube along the second direction.

[0013] Two connecting members are provided. The two connecting members are arranged at intervals along the second direction. Each connecting member is connected with the connecting columns on the same side of the two conversion tubes.

[0014] In some embodiments, grooves are provided on the upper sides of the opposite ends of the connecting member. The grooves are adapted to the connecting columns. The connecting member is located below the connecting columns so that the connecting columns are in contact with the grooves.

[0015] In some embodiments, the suspension bracket includes a spring hanger, a first suspension rod, a mounting member and two second suspension rods. The spring hanger is used for being installed on the steel structure of the furnace top. The movable end of the spring hanger, the first suspension rod, the mounting member and the second suspension rods are rotatably connected in sequence along the axis in the first direction from top to bottom. The two second suspension rods are arranged at intervals along the second direction. The middle part of the connecting member is rotatably installed at the lower end of the second suspension rod along the axis in the second direction.

[0016] In some embodiments, the two ends of the second suspension rod are respectively connected with the mounting member and the connecting member through two first U-shaped connecting members.

[0017] In some embodiments, the first U-shaped connecting member is movably installed on the second suspension rod along the vertical direction so that the distance between the connecting member and the mounting member is adjustable.

[0018] In some embodiments, the first U-shaped connecting member is provided with a through hole. The outer periphery of the second suspension rod is provided with a thread. The second suspension rod passes through the through hole.

[0019] The suspension bracket includes a first nut. The first nut is threadedly connected with the second suspension rod and is located inside the first U-shaped connecting member.

[0020] In some embodiments, the furnace body is square.

[0021] In some embodiments, the burner is arranged at the top of the furnace body.

[0022] In some embodiments, a plurality of burners are provided, and the plurality of burners are arranged at intervals along the first direction. The plurality of burners form a combustion group, and a plurality of such combustion groups are arranged at intervals along the second direction;

[0023] A plurality of the conversion tubes form a conversion group, and a plurality of such conversion groups are arranged at intervals along the second direction. The plurality of combustion groups and the plurality of conversion groups are arranged alternately.

[0024] Compared with the prior art, for the hydrogen production reformer provided by the present utility model, the burner is arranged in the furnace body; the plurality of conversion tubes are arranged at intervals along the first direction, the conversion tubes penetrate the furnace body in the vertical direction and their lower ends are fixedly connected to the furnace body; a sling is provided between two adjacent conversion tubes, and the sling includes a hanging bracket and a connecting member. The hanging bracket is used for connecting with the steel structure beam on the furnace top. The middle part of the connecting member is rotatably installed at the lower end of the hanging bracket along the second direction, and the two ends of the connecting member are respectively connected to the upper ends of two adjacent conversion tubes. The hanging bracket is installed on the steel structure cross beam on the furnace top. The hanging bracket can provide an upward elastic force. The connecting member is installed at the lower end of the hanging bracket, and the two ends of the installation member are connected to the upper ends of the two conversion tubes. When the conversion tubes expand due to heat, the hanging bracket can pull the conversion tubes upward, thereby ensuring that the conversion tubes are straight and do not bend. Moreover, one hanging bracket is simultaneously connected to two conversion tubes, and can simultaneously provide an upward pulling force for the two conversion tubes, reducing the number of the hanging brackets and lowering the cost. And the middle part of the installation member is rotatably connected to the lower end of the hanging bracket, enabling the installation member to be rotatably arranged, so as to balance the two conversion tubes and ensure that both conversion tubes can be subjected to the pulling force and remain straight.

[0025] The above description is only an overview of the technical solution of the present utility model. In order to be able to understand the technical means of the present utility model more clearly and implement it according to the content of the description, the preferred embodiments of the present utility model are described in detail below in conjunction with the accompanying drawings. The specific implementation manners of the present utility model are given in detail by the following embodiments and their accompanying drawings. Description of the Drawings

[0026] Figure 1 is a schematic structural view of an embodiment of the hydrogen production reformer provided by the present utility model;

[0027] Figure 2 is Figure 1 the top view of the hydrogen production reformer in

[0028] Figure 3 is Figure 1 the three-dimensional schematic view of the sling and the conversion tubes in

[0029] Figure 4 isFigure 1 Partial schematic view of the middle sling and the conversion tube;

[0030] Figure 5 is Figure 1 Stereoscopic schematic view of the middle sling.

[0031] Explanation of the reference numerals in the drawings:

[0032] 1 - furnace body, 2 - burner, 3 - conversion tube, 31 - connecting column, 4 - sling, 41 - first suspension rod, 42 - mounting member, 43 - second suspension rod, 44 - connecting member, 441 - groove, 45 - first U-shaped connecting member, 46 - first nut, 47 - second U-shaped connecting member. Specific implementation manners

[0033] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0034] In order to solve the technical problem in the prior art that each conversion tube is equipped with a spring hanger, resulting in a large number of spring hangers and high costs, the present utility model provides a hydrogen production reforming furnace, which can simultaneously provide an upward pulling force for two of the conversion tubes, reducing the number of the hangers and lowering the cost. The middle part of the mounting member is rotatably connected to the lower end of the hanger, so that the mounting member can be rotatably arranged, thereby being able to balance the two conversion tubes and ensuring that both of the two conversion tubes can be subjected to a pulling force and remain straight.

[0035] Please refer to Figure 1 , Figure 1 which is a schematic structural view of the hydrogen production reforming furnace in an embodiment of the present utility model.

[0036] The present utility model provides a hydrogen production reforming furnace, including a furnace body 1, a burner 2 and a plurality of conversion tubes 3; the burner 2 is arranged in the furnace body 1, and the burner 2 is used for burning in the furnace body 1 so as to heat the conversion tubes 3; the plurality of conversion tubes 3 are arranged at intervals along a first direction, the conversion tubes 3 penetrate through the furnace body 1 in the vertical direction and their lower ends are fixedly connected to the furnace body 1, and each conversion tube 3 is filled with a catalyst; wherein, a sling 4 is arranged between two adjacent conversion tubes 3, the sling 4 includes a hanger and a connecting member 44, the hanger is used for connecting with the steel structure of the furnace top, the middle part of the connecting member 44 is rotatably installed at the lower end of the hanger along a second direction, and the two ends of the connecting member 44 are respectively connected to the upper ends of two adjacent conversion tubes 3, and the first direction is perpendicular to the second direction.

[0037] In this embodiment, please refer toFigures 1 to 3 , the burner 2 is arranged on the furnace body 1; a plurality of the conversion tubes 3 are arranged at intervals along a first direction, the conversion tubes 3 penetrate through the furnace body 1 in the vertical direction and their lower ends are fixedly connected to the furnace body 1; a sling 4 is arranged between two adjacent conversion tubes 3, the sling 4 includes a hanging frame and a connecting piece 44, the hanging frame is used for connecting with the steel structure of the furnace top, the middle part of the connecting piece 44 is rotatably installed at the lower end of the hanging frame along a second direction, and the two ends of the connecting piece 44 are respectively connected to the upper ends of two adjacent conversion tubes 3. The hanging frame is installed on the steel structure cross beam of the furnace top, the hanging frame can provide an upward elastic force, the connecting piece 44 is installed at the lower end of the hanging frame, and the two ends of the installation piece 42 are connected to the upper ends of the two conversion tubes 3. When the conversion tubes 3 expand due to heat, the hanging frame can pull the conversion tubes 3 upward, so as to ensure that the conversion tubes 3 are straight and do not bend. Moreover, one hanging frame is simultaneously connected to two conversion tubes 3, and can simultaneously provide an upward pulling force for the two conversion tubes 3, reducing the number of the hanging frames and lowering the cost. The middle part of the installation piece 42 is rotatably connected to the lower end of the hanging frame, so that the installation piece 42 can be rotatably arranged, thereby being able to balance the two conversion tubes 3 and ensure that both of the two conversion tubes 3 can be subjected to a pulling force and remain straight.

[0038] In this embodiment, the upper end of the conversion tube 3 is an air inlet, the lower end of the conversion tube 3 is an exhaust port, and the air inlet is communicated with natural gas.

[0039] In one of the embodiments, please refer to Figures 3 to 4 , connection columns 31 are respectively arranged on the opposite sides of the upper end of the conversion tube 3 along the second direction; there are two connecting pieces 44, the two connecting pieces 44 are arranged at intervals along the second direction, and each connecting piece 44 is connected to the connection columns 31 on the same side of the two conversion tubes 3.

[0040] In this embodiment, since the conversion tube 3 is integrally tubular, in order to facilitate the connection between the connecting piece 44 and the conversion tube 3, two connection columns 31 are arranged at the upper end of the conversion tube 3, the connection columns 31 extend along the second direction, the two connection columns 31 are respectively a first connection column and a second connection column, the first connection columns of two adjacent conversion tubes 3 are located on the same side, one of the connecting pieces 44 is located between the two first connection columns and is connected to the two first connection columns, the other connection is located between the two second connection columns and is connected to the two second connection columns, and the two connecting pieces 44 are both rotatably connected to the hanging frame. With such an arrangement, an upward pulling force can be simultaneously applied to the two conversion tubes 3.

[0041] In one of the embodiments, please refer to Figures 3 to 4, grooves 441 are provided on the upper sides of opposite ends of the connecting member 44, the grooves 441 are adapted to the connecting columns 31, and the connecting member 44 is located below the connecting columns 31 so that the connecting columns 31 are in contact with the grooves 441.

[0042] The connection method between the connecting member 44 and the connecting column 31 is not limited. In this embodiment, since the connecting member 44 only needs to provide an upward pulling force, the connecting member 44 can be placed below the connecting column 31 so that the connecting member 44 is in contact with the connecting column 31. Since the connecting column 31 is rotatably installed on the hanger, in order to prevent relative displacement when the connecting column 31 is in contact with the connecting member 44, grooves 441 are provided at both ends of the connecting member 44, and the diameter of the grooves 441 is the same as the diameter of the connecting column 31. The connecting column 31 is clamped in the grooves 441. By limiting the connecting column 31 through the grooves 441, relative displacement between the connecting member 44 and the connecting column 31 can be avoided.

[0043] In one embodiment, please refer to Figures 3 to 5 , the hanger includes a spring hanger, a first suspension rod 41, a mounting member 42 and two second suspension rods 43. The spring hanger is used to be installed on the furnace top steel structure. The movable end of the spring hanger, the first suspension rod 41, the mounting member 42 and the second suspension rods 43 are rotatably connected in sequence along the axis in the first direction from top to bottom. The two second suspension rods 43 are arranged at intervals along the second direction. The middle part of the connecting member 44 is rotatably installed at the lower end of the second suspension rod 43 along the axis in the second direction.

[0044] In this embodiment, the spring hanger is used to be installed on the cross beam of the furnace top steel structure. The spring hanger has a movable end that elastically moves in the vertical direction. The upper end of the first suspension rod 41 is rotatably installed on the movable section along the axis in the first direction. The upper end of the mounting member 42 is rotatably installed on the lower end of the first suspension rod 41 along the axis in the first direction. The mounting member 42 is integrally arranged in a triangular plate shape. The upper ends of the two second suspension rods 43 are rotatably installed on the lower end of the mounting member 42 along the axis in the first direction. The two second suspension rods 43 are arranged at intervals along the second direction. The two second suspension rods 43 correspond to the two connecting members 44 one by one. The middle part of each connecting member 44 is rotatably installed at the lower end of the second suspension rod 43 along the axis in the second direction. By providing the first suspension rod 41, the mounting member 42 and the two second suspension rods 43, the two connecting members 44 are installed on the same spring hanger, and adjacent components are rotatably connected, so that the two conversion tubes 3 can be balanced and the two conversion tubes 3 can be straightened simultaneously.

[0045] It should be noted that the spring hanger is a prior art and will not be elaborated here. During use, the spring inside the spring hanger is compressed, thereby providing an upward pulling force to achieve the purpose of straightening the conversion pipe 3.

[0046] In one embodiment, please refer to Figures 3 to 5 , both ends of the second suspension rod 43 are respectively connected to the mounting member 42 and the connecting member 44 through two first U-shaped connectors 45.

[0047] In this embodiment, the second suspension rod 43 is rod-shaped, and both the connecting member 44 and the mounting member 42 are plate-shaped. To facilitate the rotational connection between the second suspension rod 43 and the connecting member 44 and the mounting member 42, first U-shaped connectors 45 are provided between the second suspension rod 43 and the connecting member 44 and between the second suspension rod 43 and the mounting member 42. The second suspension rod 43 is connected to the middle of the first U-shaped connector 45, and mounting shafts are connected to both ends of the first U-shaped connector 45. Through holes are provided through the middle of the connecting member 44 and the mounting member 42, and the mounting member 42 and the connecting member 44 are rotatably mounted on the mounting shafts.

[0048] In one embodiment, please refer to Figures 3 to 5 , the first U-shaped connector 45 is movably mounted on the second suspension rod 43 in the vertical direction so that the distance between the connecting member 44 and the mounting member 42 is adjustable.

[0049] In this embodiment, for the convenience of installation and debugging, the first U-shaped connector 45 is movably mounted on the second suspension rod 43, enabling the first U-shaped connector 45 to move in the vertical direction, adjusting the position of the first U-shaped connector 45, and thus achieving the adjustment of the distance between the connecting member 44 and the mounting member 42.

[0050] In one embodiment, please refer to Figures 3 to 5 , the first U-shaped connector 45 is provided with a through hole, and the outer periphery of the second suspension rod 43 is provided with a thread. The second suspension rod 43 passes through the through hole; the hanger includes a first nut 46, and the first nut 46 is threadedly connected to the second suspension rod 43 and is located inside the first U-shaped connector 45.

[0051] In this embodiment, the second suspension rod 43 is a screw rod, the middle of the first U-shaped connector 45 is provided with a through hole, the second suspension rod 43 is inserted into the through hole, and the first nut 46 is threadedly connected to the second suspension rod 43 so that the position of the first U-shaped connector 45 in the vertical direction is adjustable.

[0052] In this embodiment, in order to facilitate the connection between the first suspension rod 41 and the mounting member 42, a second U-shaped connecting member 47 is provided between the first electric pole and the mounting member 42. The lower end of the first suspension rod 41 is connected to the middle of the second U-shaped connecting member 47. Mounting shafts are connected to both ends of the second U-shaped connecting member 47. The mounting member 42 is provided with through holes, and the mounting member 42 is inserted through the mounting shafts.

[0053] The second U-shaped connecting member 47 is provided with a through hole in its longitudinal direction. The outer periphery of the first suspension rod 41 is provided with threads, and the first suspension rod 41 is inserted through the through hole; the hanger includes a second nut, and the second nut is threadedly connected to the first suspension rod 41 and is located inside the second U-shaped connecting member 47.

[0054] In one of the embodiments, please refer to Figures 1 to 2 , the furnace body 1 is arranged in a square shape.

[0055] In one of the embodiments, please refer to Figures 1 to 2 , the burner 2 is arranged on the top of the furnace body 1.

[0056] In one of the embodiments, please refer to Figures 1 to 2 , a plurality of burners 2 are provided. The plurality of burners 2 are arranged at intervals along the first direction. The plurality of burners 2 form a combustion group. A plurality of combustion groups are provided. The plurality of combustion groups are arranged at intervals along the second direction; a plurality of conversion tubes 3 form a conversion group. A plurality of conversion groups are provided. The plurality of conversion groups are arranged at intervals along the second direction. The plurality of combustion groups and the plurality of conversion groups are arranged alternately.

[0057] In this embodiment, four burners 2 are provided, and three combustion groups are provided. That is, a total of twelve burners 2 are arranged in an array on the top of the square furnace body 1. Ten conversion tubes 3 are provided, and two conversion groups are provided. That is, twenty conversion tubes 3 are arranged in an array and are arranged alternately with the burners 2, so that the conversion tubes 3 can receive double-sided radiation.

[0058] This application is beneficial to extending the service life of the conversion tube 3. Under the same use pressure, the life of high-temperature metal materials has a direct relationship with the metal wall temperature they bear: the higher the use temperature, the more its service life decreases exponentially. In this application, the conversion tube 3 is double-sided radiation, and due to the uniform distribution of the thermal field in the square furnace body 1, the radial temperature difference of the conversion tube 3 is small, it is not easy to deform, and its service life is long.

[0059] This application is beneficial to the long-term continuous and stable operation of the device. In this application, there are multiple burners 2 on the top of the square furnace body 1, which can effectively maintain the furnace temperature above 800 degrees, and the probability of flameout is very small. Even if a certain burner 2 goes out, since there are still other open flames in the furnace continuously igniting, there is no need to stop the furnace. Just close the extinguished burner 2 for a few minutes and then re-ignite it. This process will not cause the hydrogen supply to stop.

[0060] In case of a fault in this application, it is beneficial for the device to quickly resume production. If a certain conversion tube 3 is deformed, or a hot spot or even rupture occurs due to accidental reasons, for the square furnace body 1, only steam cooling and replacement are required, and the upper and lower pigtail tubes of the conversion tube 3 are cut off and welded under the protection of nitrogen, and then the temperature can be raised again to resume production (appropriately reduce the fuel gas of the corresponding burner 2). The damaged conversion tube 3 will be replaced during major repairs. The whole process can be completed within 4 to 8 hours. Since the square furnace body 1 is arranged in a matrix, the internal heat field of the furnace is very easy to adjust.

[0061] In this application, the square furnace body 1 is beneficial to reducing the NOx emission. The burner 2 in this application is a sleeve-type burner 2, which reduces the maximum flame temperature.

[0062] In this application, the square furnace body 1 is beneficial to reducing the specific hydrogen production consumption. Modern hydrocarbon steam reforming tends to a higher reaction temperature because high temperature is beneficial to the reforming reaction of natural gas, thus reducing the specific hydrogen production consumption. However, the design temperature of the current conversion tube 3 material HP-Nb is 950 degrees (one hundred thousand hours). For safe operation, the actual use temperature cannot be higher than 930 degrees. The square furnace body 1 can obtain a higher reforming reaction temperature, with more complete methane reforming and fewer impurities in the reaction gas, resulting in a lower specific hydrogen production consumption.

[0063] In summary, the square furnace body 1 is suitable for occasions with high production intensity and continuous, stable and long-term production requirements, and the production scale can range from several hundred cubic meters to tens of thousands of cubic meters per hour.

[0064] In addition, the top-fired box furnace has the following characteristics:

[0065] 1. Most suitable for the requirements of reforming reaction

[0066] The reforming reaction is an endothermic reaction, and the heat required to maintain the reaction is transferred from the flue gas to the reactants through radiation. At the inlet of the conversion tube 3, the reactants have a relatively low equilibrium temperature, and the partial pressure of the hydrocarbon raw material is relatively high. The reforming reaction is only limited by the heat transfer rate and the catalyst activity. At the outlet of the conversion tube 3, since the reforming is basically completed, the partial pressure of the raw material is relatively low and the heat absorption is small. Due to the high flame temperature in the upper part of the top-fired box furnace, the heat transfer rate in the upper part of the conversion tube 3 is fast, so it can meet the requirements of the fast reaction speed and large heat absorption in the upper part of the reforming reaction.

[0067] 2. It is beneficial to extend the service life of the reforming tube 3

[0068] According to the requirements of the reforming reaction, the maximum heat transfer amount is located at the inlet of the reforming tube 3 where the process temperature is relatively low. Its average heat flux is twice that of the average heat flux of the reforming tube 3. In the top-fired box furnace, since the flame is downward, the high heat flux at the inlet will not cause a high metal temperature (the process gas temperature is relatively low here). Therefore, the surface temperature of the reforming tube 3 is evenly distributed along the axis, enabling the high-temperature resistance performance of the reforming tube 3 to be fully exerted.

[0069] 3. High radiation efficiency and less fuel consumption

[0070] Another advantage of the co-current flow of the flame and the process fluid is that the radiation section efficiency of the top-fired box furnace is higher than that of the side-fired furnace or the bottom-fired furnace. In the top-fired box furnace, the combustion products come from the mixing zone at the top of the radiation chamber. As the combustion products cool and become heavier, they naturally tend to flow downward. While in the reforming furnace with bottom combustion, the combustion products are at the top of the radiation chamber. As the combustion products pass upward through the combustion chamber, the combustion products cool down, causing reverse mixing. This reverse mixing will cause a decrease in the overall radiation temperature. For a given conversion amount, the bottom-fired and side-fired reforming furnaces require more fuel than the top-fired reforming furnace.

[0071] In this embodiment, the material of the reforming tube 3 is selected as the HP-Nb (ZG40Ni35Cr25Nb) high-temperature alloy. This alloy is a high-temperature alloy pipe developed and developed on the basis of HK-40 and its modified types. Since the centrifugally cast HP-Nb high-temperature alloy contains relatively high alloying elements such as C, Cr, and Ni, the microstructure is in a cast structure. It can work continuously under harsh working conditions of high temperature (1200 °C) and high pressure (4 MPa). And the reforming tube 3 is usually centrifugally cast. After the inner diameter is machined smoothly, casting defects such as carburization can be effectively removed. Austenitic stainless steel containing more than 16.5% Cr will generate Fe-Cr compounds when working in the temperature range of 590-930 °C for a long time. This compound is hard and brittle and non-magnetic, which is called the α phase. The phenomenon of material embrittlement due to the existence of the α phase is called "α brittleness". However, alloy steel with a Ni content higher than 33% will not generate the α phase. Therefore, the lower header pipe is made of INCOLOY800H alloy steel with a Ni content higher than 35%, which can effectively avoid the occurrence of "α brittleness". At the same time, this material has excellent toughness, which can meet its own thermal stress and the stress caused by the thermal expansion of the pigtail pipe.

[0072] In this embodiment, ceramic fiber has the advantages of light texture, can reduce the load of steel structure, low thermal conductivity, can make the furnace lining thin and have good insulation effect, simple structure, and convenient construction. However, ceramic fiber also has disadvantages such as being not resistant to flue gas erosion and being prone to low-temperature corrosion of the furnace shell steel plate. Therefore, in this application, ceramic fiber is laid on the vertical wall and furnace roof of the furnace body 1. The refractory castable has the characteristics of strong plasticity, being suitable for various occasions with complex shapes, simple construction, and having higher erosion resistance than refractory ceramic fiber. Therefore, refractory castable is used in the furnace bottom, convection section inlet, convection section and other parts.

[0073] The specific process is as follows:

[0074] The pipeline network is connected to two natural gas lines, one as raw natural gas and the other as combustion natural gas;

[0075] Raw natural gas: Natural gas at room temperature and pressure of about 1.0~1.6MPa(G) from the pipeline network is pressurized to 2.3~2.5MPa(G) by a natural gas compressor, mixed with recycled hydrogen, and then enters the raw gas buffer tank;

[0076] The desulfurized raw gas is mixed with water vapor in a certain ratio (molar ratio of about 1:3.2) and preheated to 580°C. It then enters the conversion tube 3. Under the action of the catalyst in the conversion tube 3, methane and water vapor react to produce a mixed gas such as H2, CO, and CO2. The main reaction process is as follows:

[0077] CH4+H20(steam) = CO +3H2 (conversion reaction)

[0078] CO+H20(steam) = CO2 +H2 (shift reaction)

[0079] The water vapor is generated by passing desalted water through a steam generator.

[0080] The natural gas is burned in communication with the burner 2 and used as fuel.

[0081] The mixed gas is cooled to below 40°C in a cooler, and then separated by a gas-liquid separator before entering the PSA process.

[0082] The specific embodiments of the present invention described above do not limit the scope of protection of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A hydrogen production reformer, characterized in that, It includes: A furnace body; A burner, arranged on the furnace body; And Multiple conversion tubes, arranged at intervals along a first direction, the conversion tubes are vertically arranged through the furnace body and their lower ends are fixedly connected to the furnace body; Wherein, a lifting device is arranged between two adjacent conversion tubes, the lifting device includes a hanging bracket and a connecting piece, the hanging bracket is used for connecting with the steel structure of the furnace top, the middle part of the connecting piece is rotatably installed at the lower end of the hanging bracket along a second direction, and two ends of the connecting piece are respectively connected to the upper ends of two adjacent conversion tubes, and the first direction is perpendicular to the second direction.

2. The hydrogen production reformer according to claim 1, wherein Connecting columns are respectively arranged on opposite sides of the upper end of the conversion tube along the second direction; There are two connecting pieces, the two connecting pieces are arranged at intervals along the second direction, and each connecting piece is connected to the connecting columns on the same side of the two conversion tubes.

3. The hydrogen production reforming furnace according to claim 2, characterized in that, Grooves are arranged on the upper sides of opposite ends of the connecting piece, the grooves are adapted to the connecting columns, and the connecting piece is located below the connecting columns so that the connecting columns are in contact with the grooves.

4. The hydrogen production reforming furnace according to claim 2, wherein The hanging bracket includes a spring hanger, a first suspension rod, a mounting piece and two second suspension rods, the spring hanger is used for being installed on the steel structure of the furnace top, the movable end of the spring hanger, the first suspension rod, the mounting piece and the second suspension rods are rotatably connected in sequence along the axis in the first direction from top to bottom, the two second suspension rods are arranged at intervals along the second direction, and the middle part of the connecting piece is rotatably installed at the lower end of the second suspension rod along the axis in the second direction.

5. The hydrogen production reforming furnace according to claim 4, wherein, Two ends of the second suspension rod are respectively connected to the mounting piece and the connecting piece through two first U-shaped connecting pieces.

6. The hydrogen production reforming furnace according to claim 5, wherein, The first U-shaped connecting piece is movably installed on the second suspension rod along the vertical direction so that the distance between the connecting piece and the mounting piece is adjustable.

7. The hydrogen production reforming furnace according to claim 6, wherein, The first U-shaped connecting piece is provided with a through hole, the outer periphery of the second suspension rod is provided with threads, and the second suspension rod passes through the through hole; The hanging bracket includes a first nut, and the first nut is threadedly connected to the second suspension rod and is located inside the first U-shaped connecting piece.

8. The hydrogen production reformer according to claim 1, wherein, The furnace body is arranged in a square shape.

9. The hydrogen production reforming furnace according to claim 1, characterized in that, The burner is arranged on the top of the furnace body.

10. The hydrogen production reforming furnace according to claim 9, characterized in that, There are multiple burners, the multiple burners are arranged at intervals along the first direction, the multiple burners form a combustion group, there are multiple combustion groups, and the multiple combustion groups are arranged at intervals along the second direction; The multiple conversion tubes form a conversion group, there are multiple conversion groups, the multiple conversion groups are arranged at intervals along the second direction, and the multiple combustion groups and the multiple conversion groups are arranged alternately.

Images