A circulating reformer and a high-temperature methanol water hydrogen reforming device

Abstract

The application provides a circulation reformer, which comprises methanol water guide members, gas inlet guide members, gas outlet guide members, hydrogen guide members and a guide device, the guide device comprises a plurality of flow channel plates arranged in parallel, two sides of the flow channel plates form methanol water flow channels and hot gas flow channels respectively, a side of the flow channel plates corresponding to the methanol water flow channels is provided with a first catalytic plate and a second catalytic plate, the first catalytic plate and the second catalytic plate are metal plates with different materials, the inlets of the methanol water flow channels are communicated with the methanol water guide members, the outlets of the methanol water flow channels are communicated with the hydrogen guide members, the inlets of the hot gas flow channels are communicated with the gas inlet guide members, and the outlets of the hot gas flow channels are communicated with the gas outlet guide members. The circulation reformer replaces the traditional granular catalyst with the catalytic plates made of two different metal materials, thereby solving the problem of difficulty in using two kinds of catalysts of the existing reformer and realizing the function of two-stage catalysis of the catalyst.

Description

Technical Field

[0001] This invention relates to the field of methanol-water hydrogen production technology, and more specifically, to a circulating reformer and a high-temperature methanol-water hydrogen production reforming device. Background Technology

[0002] Methanol-to-hydrogen (MHD) is a technological route for hydrogen production. my country is the world's largest methanol producer, accounting for 60% of global methanol production capacity. Due to the abundant and inexpensive availability of methanol, and its ease of storage and transportation as a liquid at ambient temperature and pressure, methanol-to-hydrogen has lower energy consumption and cost compared to other hydrogen production methods, such as industrial hydrogen production. Industrially, methanol-to-hydrogen utilizes three main pathways: methanol cracking, partial oxidation of methanol, and methanol vapor reforming. Among these three technologies, methanol-water reforming produces the highest hydrogen content, reaching up to 75%. It also boasts efficient energy utilization, simple process control, ease of industrial operation, and mature technology, making it the optimal choice for methanol-to-hydrogen production currently.

[0003] The basic operation of existing high-temperature methanol-water reforming units is as follows: First, methanol-water is passed into a vaporizer to vaporize it. Then, the vaporized methanol-water vapor is passed into the reformer to produce hydrogen. The produced hydrogen then passes through a condenser to remove condensate before being discharged for use. Most existing reformers are tubular, with the tubes filled with granular catalyst. The gaps between the tubes allow high-temperature exhaust gas from combustion to flow, providing heat for the reforming reaction. Furthermore, traditional granular catalysts can only be loaded with one type in the same section of tube. Loading two or more catalysts makes it difficult to control the loading position and leads to mixing and displacement during transportation and use, making it difficult to control operating conditions. Summary of the Invention

[0004] This invention provides a circulating reformer that replaces the traditional particulate catalyst with two catalyst plates made of two different metal materials, thereby solving the problem of difficulty in using two catalysts in existing reformers, realizing the function of two-stage catalysis, effectively simplifying the structure of the reformer and improving its catalytic efficiency.

[0005] To solve the above-mentioned technical problems, the present invention provides a circulating reformer, comprising: a methanol-water flow guide, an inlet flow guide, an outlet flow guide, a hydrogen flow guide, and a flow deflector. The flow deflector includes multiple parallel flow channel plates, with methanol-water flow channels and hot gas flow channels formed on both sides of the flow channel plates, respectively. A first catalytic plate and a second catalytic plate are provided on the side of the flow channel plate corresponding to the methanol-water flow channel. The first catalytic plate and the second catalytic plate are metal plates of different materials. The inlet of each methanol-water flow channel is connected to the methanol-water flow guide, the outlet of each methanol-water flow channel is connected to the hydrogen flow guide, the inlet of each hot gas flow channel is connected to the inlet flow guide, and the outlet of each hot gas flow channel is connected to the outlet flow guide.

[0006] In this case, methanol-water channels and hot gas channels are formed on both sides of the flow channel plate. The methanol-water channels allow methanol-water mixtures to pass through, and the methanol-water mixture enters each channel through methanol-water guide elements. Hydrogen generated after the reaction flows out from each methanol-water channel through hydrogen guide elements. The hot gas channels allow hot gas to pass through and also provide heat to the methanol-water channels. By setting a first catalytic plate and a second catalytic plate on the methanol-water channels, the dual-stage catalytic function of the catalyst is achieved, effectively improving the catalytic effect. Moreover, the catalytic plate configuration allows the reformer to be switched on and off at any time, eliminating the need for a protective device like that required for granular catalysts, making it convenient to use.

[0007] Furthermore, the flow guide includes a hot gas heating zone and a hydrogen heating zone arranged side by side. The inlet flow guide includes a hot gas inlet flow guide and a hydrogen inlet flow guide. The outlet flow guide includes a hot gas outlet flow guide and a hydrogen outlet flow guide. The inlet of each hot gas flow channel in the hot gas heating zone is connected to the hot gas inlet flow guide, and the outlet is connected to the hot gas outlet flow guide. The inlet of each hot gas flow channel in the hydrogen heating zone is connected to the hydrogen inlet flow guide, and the outlet is connected to the hydrogen outlet flow guide. The hydrogen flow guide is connected to the hydrogen inlet flow guide.

[0008] In this case, hot hydrogen generated in the methanol-water flow channel of the hot gas heating zone is input into the hot gas flow channel of the hydrogen heating zone, thereby realizing the utilization of hot hydrogen preheating and effectively improving the heat utilization efficiency of the reformer.

[0009] Furthermore, the first catalyst plate is a pure nickel thin plate, and the second catalyst plate is a pure copper thin plate, with a thickness of 0.1mm-0.2mm between the first and second catalyst plates.

[0010] In this case, the first catalytic plate catalyzes the part with a temperature above 400℃, and the second catalytic plate catalyzes the part with a temperature below 280℃. By controlling the thickness of the first and second catalytic plates to 0.1mm-0.2mm, the thickness of the catalytic plates can be minimized while ensuring catalytic efficiency.

[0011] Furthermore, a high-temperature reaction tank and a low-temperature reaction tank are provided on the flow channel plate on one side of the methanol-water flow channel, and both the high-temperature reaction tank and the low-temperature reaction tank are arranged along the length of the flow channel plate. The bottom of the high-temperature reaction tank is covered with a first catalyst plate, and the bottom of the low-temperature reaction tank is covered with a second catalyst plate.

[0012] In this case, laying the catalyst plate in the reaction tank can reduce the resistance of the flow channel, thereby reducing the energy lost due to resistance.

[0013] Furthermore, the flow guide includes two sealing plates, which are respectively disposed on both sides of the flow channel plate arrangement direction. The sealing plates seal the methanol-water flow channel and / or hot flow channel located on both sides of the flow guide.

[0014] The present invention also provides a high-temperature methanol-water hydrogen production reforming device, including the above-mentioned circulating reformer and a burner. The burner includes a methanol input guide, an air input guide, a combustion gas output guide, and a combustion chamber. The outlet of the methanol input guide, the outlet of the air input guide, and the inlet of the combustion gas output guide are all connected to the combustion chamber, and the inlet of the air input guide is connected to the outlet of the combustion gas output guide.

[0015] In this case, the circulating reformer is heated by a burner. The burner uses methanol as fuel and air as a combustion aid, which can reach a high temperature of over 900°C, fully meeting the heating requirements of the hydrogen production reaction.

[0016] Furthermore, the burner also includes a plate-type flow divider, in which multiple flow dividers are spaced apart, and the gap between each pair of flow dividers is connected to the combustion chamber, the methanol input guide, and the air input guide.

[0017] In this case, the combustion efficiency of the burner can be effectively improved by using a plate-type diversion chamber design.

[0018] Furthermore, an igniter and a temperature sensor are installed on the combustion chamber.

[0019] In this case, ignition is achieved through an igniter, and a thermometer detects the combustion temperature to facilitate combustion control.

[0020] Furthermore, it also includes: an air preheater, which includes: a preheated exhaust gas inlet guide, a preheated exhaust gas outlet guide, a preheated air inlet guide, and a preheating guide. The preheating guide includes multiple parallel preheating flow channel plates, with air flow channels and heating gas flow channels spaced apart between adjacent preheating flow channel plates. The outlet of the preheated exhaust gas inlet guide is connected to the inlet of all heating gas flow channels, the inlet of the preheated exhaust gas inlet guide is connected to the outlet guide, the inlet of the preheated exhaust gas outlet guide is connected to the outlet of all heating gas flow channels, and the outlet of the preheated air inlet guide is connected to the inlet of all air flow channels.

[0021] In this case, the air preheater preheats the air by reusing the combustion exhaust gas output from the circulating reformer, thus achieving efficient energy utilization and reducing the system's energy consumption.

[0022] Furthermore, a preheating air guide is provided between the air preheater and the burner. The inlet of the preheating air guide is connected to the outlet of all air channels, and the outlet of the preheating air guide is connected to the inlet of the air input guide.

[0023] In this case, the preheated air is delivered to the burner for combustion through the preheated air guide. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a cyclic reformer provided in an embodiment of the present invention;

[0025] Figure 2 A schematic diagram of the structure of a cyclic reformer from another perspective provided by an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the reforming device provided in an embodiment of the present invention;

[0027] Figure 4 A schematic diagram of the reforming device from another perspective provided in an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the burner provided in an embodiment of the present invention;

[0029] Figure 6 A schematic diagram of the burner from another perspective, provided for an embodiment of the present invention;

[0030] Figure 7 A schematic diagram of the structure of the air preheater provided in this embodiment of the invention;

[0031] Figure 8 A schematic diagram of the structure of an air preheater from another perspective, provided for an embodiment of the present invention;

[0032] Figure 9 This is a schematic diagram of the flow guide provided in an embodiment of the present invention;

[0033] Figure 10 This is a schematic diagram of the flow guide provided in an embodiment of the present invention from another perspective; Attached image description:

[0035] 100-Burner; 110-Combustion Chamber; 111-Igniter; 112-Thermometer; 120-Plate Diverter; 130-Air Inlet Guide; 140-Methanol Inlet Guide; 150-Combustion Gas Outlet Guide; 200-Circulating Reformer; 210-Guide; 211-Methanol-Water Flow Channel; 212-Hot Gas Flow Channel; 213-First Catalyst Plate; 214-Second Catalyst Plate; 215-Sealing Plate; 220-Hydrogen Collection Pipe; 230-Methanol-Water Guide; 240-Outlet Guide Flow components; 241-Hot gas outlet guide section; 242-Hydrogen gas outlet guide section; 250-Condensate pipe; 260-Hot gas conveying component; 270-Inlet guide component; 271-Hot gas inlet guide section; 272-Hydrogen inlet guide section; 280-Hydrogen guide component; 300-Air preheater; 310-Preheating guide; 311-Heating gas flow channel; 320-Preheating exhaust gas input guide component; 330-Preheating exhaust gas output guide component; 340-Preheating air input guide component; 350-Preheating air guide component. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0038] It should be noted that similar symbols and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0039] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0040] A specific embodiment of the present invention provides a circulating reformer, comprising: a methanol-water guide 230, an inlet guide 270, an outlet guide 240, a hydrogen guide 280, and a flow guide 210. The flow guide 210 includes multiple parallel flow channel plates, with methanol-water flow channels 211 and hot gas flow channels 212 formed on both sides of the flow channel plates, respectively. A first catalytic plate 213 and a second catalytic plate 214 are provided on the side of the flow channel plate corresponding to the methanol-water flow channel 211. The first catalytic plate 213 and the second catalytic plate 214 are metal plates of different materials. The inlet of each methanol-water flow channel 211 is connected to the methanol-water guide 230, and the outlet of each methanol-water flow channel 211 is connected to the hydrogen guide 280. The inlet of each hot gas flow channel 212 is connected to the inlet guide 270, and the outlet of each hot gas flow channel 212 is connected to the outlet guide 240. The first catalytic plate 213 is a pure nickel thin plate, and the second catalytic plate 214 is a pure copper thin plate. The thickness of the first catalytic plate 213 and the second catalytic plate 214 is 0.1mm-0.2mm. The flow guide 210 includes two sealing plates 215, which are respectively disposed on both sides of the flow channel plate arrangement direction. The sealing plates 215 seal the methanol-water flow channel 211 and / or hot gas flow channel 212 located on both sides of the flow guide 210.

[0041] The flow guide 210 includes a hot gas heating zone and a hydrogen heating zone arranged side by side. The inlet flow guide 270 includes a hot gas inlet flow guide 271 and a hydrogen inlet flow guide 272. The outlet flow guide 240 includes a hot gas outlet flow guide 241 and a hydrogen outlet flow guide 242. The inlet of each hot gas flow channel 212 in the hot gas heating zone is connected to the hot gas inlet flow guide 271, and the outlet is connected to the hot gas outlet flow guide 241. The inlet of each hot gas flow channel 212 in the hydrogen heating zone is connected to the hydrogen inlet flow guide 272, and the outlet is connected to the hydrogen outlet flow guide 242. The hydrogen flow guide 280 is connected to the hydrogen inlet flow guide 272. The gas outlet guide 240 is also equipped with a hydrogen collection pipe 220 and a condensate pipe 250. The inlet of the hydrogen collection pipe 220 is connected to the hydrogen outlet guide section 242, and the inlet of the condensate pipe 250 is also connected to the hydrogen outlet guide section 242. The gas outlet guide 240 is a hollow cuboid box, and the hot gas outlet guide section 241 and the hydrogen outlet guide section 242 are separated by a partition.

[0042] The flow channel plate is rectangular, with a sealing strip between adjacent flow channel plates. The sealing strip runs along the long side of the flow channel plate, and its opposite sides connect to the two adjacent flow channel plates. One side of one of the adjacent flow channel plates has an interconnected high-temperature reaction tank and a low-temperature reaction tank, both arranged along the length of the flow channel plate. The bottom of the high-temperature reaction tank is covered with a first catalyst plate 213, and the bottom of the low-temperature reaction tank is covered with a second catalyst plate 214. An opening, the inlet of the methanol-water flow channel 211, is provided on one sealing strip near the high-temperature reaction tank, and an opening, the outlet of the methanol-water flow channel 211, is also provided on the other sealing strip near the low-temperature reaction tank.

[0043] This invention also provides a high-temperature methanol-water hydrogen production reforming device, including the aforementioned circulating reformer 200 and a burner 100. The burner 100 includes a methanol input guide 140, an air input guide 130, a combustion gas output guide 150, and a combustion chamber 110. The outlet of the methanol input guide 140, the outlet of the air input guide 130, and the inlet of the combustion gas output guide 150 are all connected to the combustion chamber 110. The inlet of the air intake guide 270 is connected to the outlet of the combustion gas output guide 150. The burner 100 also includes a plate-type flow divider 120, in which multiple flow dividers are spaced apart. The interval between every two flow dividers is connected to the combustion chamber 110, the methanol input guide 140, and the air input guide 130. An igniter 111 and a thermometer 112 are provided on the combustion chamber 110.

[0044] The hot gas inlet guide section 271 is an annular enclosure with its opening facing upwards. The inlet of the hot gas inlet guide section 271 is connected to the outlet of the combustion gas output guide section 150 via the hot gas conveying section 260. The hydrogen inlet guide section 272 is rectangular in shape, with an opening at its bottom connecting to the hot gas flow channel 212, and an opening on its side connecting to the hydrogen guide section 280.

[0045] The reforming unit also includes an air preheater 300, which includes a preheated exhaust gas inlet guide 320, a preheated exhaust gas outlet guide 330, a preheated air inlet guide 340, and a preheating guide 310. The preheating guide 310 includes multiple parallel preheating flow channel plates, with air flow channels and heating gas flow channels 311 spaced apart between adjacent preheating flow channel plates. The outlet of the preheated exhaust gas inlet guide 320 is connected to the inlet of all heating gas flow channels 311, the inlet of the preheated exhaust gas inlet guide 320 is connected to the outlet guide 240, the inlet of the preheated exhaust gas outlet guide 330 is connected to the outlet of all heating gas flow channels 311, and the outlet of the preheated air inlet guide 340 is connected to the inlet of all air flow channels. A preheating air guide 350 is provided between the air preheater 300 and the burner 100. The inlet of the preheating air guide 350 is connected to the outlet of all air channels, and the outlet of the preheating air guide 350 is connected to the inlet of the air input guide 130.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cyclic reformer, characterized in that, include: The system includes a methanol-water flow guide (230), an inlet flow guide (270), an outlet flow guide (240), a hydrogen flow guide (280), and a flow deflector (210). The flow deflector (210) comprises multiple parallel flow channel plates. A methanol-water flow channel (211) and a hot gas flow channel (212) are formed on both sides of each flow channel plate. A first catalytic plate (213) and a second catalytic plate (214) are provided on the side of the flow channel plate corresponding to the methanol-water flow channel (211). The first catalyst plate (213) and the second catalyst plate (214) are metal plates made of different materials. The inlet of each methanol-water flow channel (211) is connected to the methanol-water guide (230), the outlet of each methanol-water flow channel (211) is connected to the hydrogen guide (280), the inlet of each hot gas flow channel (212) is connected to the air inlet guide (270), and the outlet of each hot gas flow channel (212) is connected to the air outlet guide (240). The flow guide (210) includes a hot gas heating zone and a hydrogen heating zone arranged side by side. The air inlet guide (270) includes a hot gas inlet guide section (271) and a hydrogen inlet guide section (272). The air outlet guide (240) includes a hot gas outlet guide section (241) and a hydrogen outlet guide section (242). The inlet of each hot gas flow channel (212) in the hot gas heating zone is connected to the hot gas inlet guide section (271), and the outlet is connected to the hot gas outlet guide section (241). The inlet of each hot gas flow channel (212) in the hydrogen heating zone is connected to the hydrogen inlet guide section (272), and the outlet is connected to the hydrogen outlet guide section (242). The hydrogen guide (280) is connected to the hydrogen inlet guide section (272). The first catalyst plate (213) is a pure nickel thin plate, and the second catalyst plate (214) is a pure copper thin plate. The thickness of the first catalyst plate (213) and the second catalyst plate (214) is 0.1mm-0.2mm. A high-temperature reaction tank and a low-temperature reaction tank are provided on the flow channel plate on one side of the methanol-water flow channel (211), and the high-temperature reaction tank and the low-temperature reaction tank are arranged along the length of the flow channel plate. The bottom of the high-temperature reaction tank is covered with the first catalyst plate (213), and the bottom of the low-temperature reaction tank is covered with the second catalyst plate (214). The first catalytic plate catalyzes the portion with a temperature above 400°C, and the second catalytic plate catalyzes the portion with a temperature below 280°C.

2. The cyclic reformer according to claim 1, characterized in that, The flow guide (210) includes two sealing plates (215), which are respectively disposed on both sides of the flow channel plate arrangement direction. The sealing plates (215) seal the methanol water flow channel (211) and / or the hot air flow channel (212) located on both sides of the flow guide (210).

3. A high-temperature methanol-water hydrogen production reforming unit, characterized in that, The invention includes a circulating reformer (200) as described in any one of claims 1-2 and a burner (100), wherein the burner (100) includes a methanol input guide (140), an air input guide (130), a combustion gas output guide (150), and a combustion chamber (110), wherein the outlet of the methanol input guide (140), the outlet of the air input guide (130), and the inlet of the combustion gas output guide (150) are all connected to the combustion chamber (110), and the inlet of the air intake guide (270) is connected to the outlet of the combustion gas output guide (150).

4. The high-temperature methanol-water hydrogen reforming apparatus according to claim 3, characterized in that, The burner (100) also includes a plate-type flow divider (120), in which multiple flow dividers are spaced apart, and the interval between each two flow dividers is connected to the combustion chamber (110), the methanol input guide (140), and the air input guide (130).

5. The high-temperature methanol-water hydrogen reforming apparatus according to claim 4, characterized in that, An igniter (111) and a thermometer (112) are provided on the combustion chamber (110).

6. The high-temperature methanol-water hydrogen reforming apparatus according to claim 3, characterized in that, Also includes: An air preheater (300) includes: a preheating exhaust gas inlet guide (320), a preheating exhaust gas outlet guide (330), a preheating air inlet guide (340), and a preheating guide (310). The preheating guide (310) includes multiple parallel preheating flow channel plates, with air flow channels and heating gas flow channels (311) spaced apart between adjacent preheating flow channel plates. The outlet of the preheating exhaust gas inlet guide (320) is connected to the inlet of all the heating gas flow channels (311), the inlet of the preheating exhaust gas inlet guide (320) is connected to the outlet guide (240), the inlet of the preheating exhaust gas outlet guide (330) is connected to the outlet of all the heating gas flow channels (311), and the outlet of the preheating air inlet guide (340) is connected to the inlet of all the air flow channels.

7. The high-temperature methanol-water hydrogen reforming apparatus according to claim 6, characterized in that, A preheating air guide (350) is provided between the air preheater (300) and the burner (100). The inlet of the preheating air guide (350) is connected to the outlet of all the air channels, and the outlet of the preheating air guide (350) is connected to the inlet of the air input guide (130).

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