Novel methanol reforming device
By designing a new methanol reforming device, using combustion exhaust gas to provide heat and adjust the temperature through a temperature-controlled heat exchanger, the problem of reaction temperature changes in the prior art affecting catalytic performance, improving system efficiency and reducing heat loss.
Patent Information
- Application Number
- CN202421633907.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-11
AI Technical Summary
In the existing methanol water catalytic reforming reaction, the change in reaction temperature has a great impact on the catalytic performance of the catalyst, resulting in low conversion rate and reduced system efficiency.
A new methanol reforming device was designed, using combustion exhaust gas as a direct heat source to heat the battery air through the air heater, and the high-temperature air temperature entering the reforming reactor is adjusted through a temperature-controlled heat exchanger to reduce heat loss and improve system efficiency.
It is achieved without additional heat exchange media, and the use of fuel cell exhaust energy to provide stable heat for methanol water catalytic reforming reaction without the need for additional heat exchange media, improving system efficiency and reducing heat loss.
Smart Images
Figure CN222795171U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of fuel cells, and in particular relates to a novel methanol reforming device. Background Art
[0002] In a solid oxide fuel cell power generation system, carbon-containing organic fuels usually undergo catalytic reforming before entering the fuel cell power generation system for electrochemical reactions. The non-precious metal catalysts used in the existing methanol-water catalytic reforming reaction are generally copper-based or nickel-based catalysts, which are characterized by low reaction temperature, high catalytic activity, and high conversion rate. However, changes in reaction temperature have a great influence on the catalytic performance of the catalyst. Generally, the optimal reaction temperature is around 250°C. When the reaction temperature is lower than 200°C, the conversion rate is too low. When the reaction temperature exceeds 300°C, the catalyst is easily deactivated. Since this reaction is an endothermic reaction, an external heat source is required to provide heat. In order to maximize the efficiency of the battery, using an exhaust gas combustion furnace for heating is a more reasonable way to recycle heat.
[0003] The temperature of the exhaust gas after combustion in the combustion furnace is generally high, and depending on the control strategy, when the battery load changes, the hydrogen content in the battery exhaust gas will change, causing the temperature of the combustion furnace to fluctuate. If the heat of the combustion furnace is to be matched with the heat of the reforming reactor, a heat exchange medium such as thermal oil, molten salt, etc. can be used to achieve heat buffering, but an additional circulation pump is required, resulting in reduced system efficiency. Utility Model Content
[0004] In view of this, the utility model aims to propose a novel methanol reforming device to solve the above technical problems.
[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:
[0006] A novel methanol reforming device comprises an igniter, a combustion chamber, an air heater, a temperature-controlled heat exchanger and a reforming reactor, wherein an air inlet pipe is provided on the left side of the igniter, and the combustion chamber is installed on the right side of the igniter; the air heater is installed on the right side of the combustion chamber, the temperature-controlled heat exchanger is installed on the right side of the air heater, and the reforming reactor is installed on the right side of the temperature-controlled heat exchanger; the air heater, the temperature-controlled heat exchanger and the reforming reactor are sealed and connected via an air collecting hood; the air collecting hood located on the right side of the reforming reactor is provided with an air outlet pipe; the air collecting hood on the right side of the reforming reactor is communicated with the temperature-controlled heat exchanger.
[0007] Furthermore, a plurality of first tube bundles are installed in the air heater, and a first heat transfer fin is installed on the first tube bundle; a first air inlet pipe is arranged on the top of the air heater; a first air inlet guide cover is installed on the top of the first tube bundle, and the first air inlet guide cover is connected to the first air inlet pipe; a first air outlet pipe is arranged at the bottom of the air heater; a first air outlet guide cover is installed at the bottom of the first tube bundle, and the first air outlet guide cover is connected to the first air outlet pipe.
[0008] Furthermore, a plurality of second tube bundles are installed in the temperature-controlled heat exchanger, and second heat transfer fins are installed on the second tube bundles; a second air inlet pipe is arranged on the top of the temperature-controlled heat exchanger; a second air inlet guide cover is installed on the top of the second tube bundle, and the second air inlet guide cover is connected to the second air inlet pipe; and a second air outlet guide cover is installed at the bottom of the second tube bundle.
[0009] Furthermore, a variable frequency fan is installed in the second air inlet guide cover.
[0010] Furthermore, a plurality of third tube bundles are installed in the reforming reactor, the third tube bundles are arranged horizontally, and third heat transfer fins are installed on the third tube bundles; a third air inlet pipe and a third air outlet pipe are arranged on the top of the reforming reactor, the third air inlet pipe is located on the air inlet end side of the third tube bundle, and the third air outlet pipe is located on the air outlet end side of the third tube bundle.
[0011] Furthermore, it also includes a gas channel, one end of which is connected to the second gas outlet guide cover, and the other end of which is connected to the gas collecting cover on the right side of the reforming reactor.
[0012] Furthermore, an annular air guide plate is embedded inside the igniter.
[0013] Furthermore, the igniter is equipped with a methanol pipeline, and a methanol nozzle is installed at the port of the methanol pipeline, and the methanol nozzle is located inside the igniter; the methanol pipeline passes through the annular air guide plate, and its port is arranged toward the direction of the combustion chamber.
[0014] Furthermore, the igniter is equipped with a waste reforming gas pipeline, the port of the waste reforming gas pipeline is provided with a waste reforming gas nozzle, and the waste reforming gas nozzle is located inside the igniter; the waste reforming gas pipeline runs through the annular air guide plate.
[0015] Furthermore, a supplementary methanol pipeline is installed on the side wall of the igniter, and a supplementary methanol nozzle is installed on the port of the supplementary methanol pipeline; the supplementary methanol pipeline passes through the annular air guide plate; and its port is arranged toward the direction of the combustion chamber.
[0016] Compared with the prior art, the novel methanol reforming device described in the utility model has the following beneficial effects:
[0017] The new methanol reforming device described in the utility model uses combustion tail gas as a direct heat source, and uses an air heater to achieve high-quality heat for heating the battery air; a temperature-controlled heat exchanger is added to adjust the temperature of the high-temperature air entering the reforming reactor by adjusting the flow rate of the temperature-controlled air. The heated temperature-controlled air is mixed with the low-temperature tail gas and discharged through the outlet pipe for use by subsequent devices. No additional heat exchange medium is required, and the energy contained in the fuel cell tail gas can be used to provide stable heat for the methanol-water catalytic reforming reaction with low heat loss, thereby improving system efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:
[0019] Figure 1 It is a schematic diagram of the structure of the utility model;
[0020] Figure 2 It is a cross-sectional view of the utility model.
[0021] Description of reference numerals:
[0022] 1-intake pipe; 2-igniter; 3-combustion chamber; 4-air heater; 5-temperature control heat exchanger; 6-reforming reactor; 7-gas collecting hood; 8-exhaust pipe; 9-gas channel; 21-methanol pipe; 22-supplementary methanol pipe; 23-annular air guide plate; 24-waste reforming gas nozzle; 25-waste reforming gas pipe; 26-methanol nozzle; 27-supplementary methanol nozzle; 41-first intake pipe; 42-first heat transfer fin; 43-first outlet pipe; 44-first tube bundle; 45-first intake guide cover; 46-first outlet guide cover; 51-second intake pipe; 52-second tube bundle; 53-second heat transfer fin; 54-second outlet guide cover; 61-third intake pipe; 62-third outlet pipe; 63-third tube bundle; 64-third heat transfer fin. DETAILED DESCRIPTION
[0023] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0024] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.
[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.
[0026] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.
[0027] The utility model provides a new methanol reforming device, including an igniter, a combustion chamber, an air heater, a temperature control heat exchanger and a reforming reactor, wherein an air inlet pipe is provided on the left side of the igniter for providing oxygen to the igniter, and the combustion chamber is installed on the right side of the igniter; the air heater is installed on the right side of the combustion chamber, the temperature control heat exchanger is installed on the right side of the air heater, and the reforming reactor is installed on the right side of the temperature control heat exchanger; the air heater, the temperature control heat exchanger and the reforming reactor are sealed and connected through an air collecting hood; the air collecting hood located on the right side of the reforming reactor is provided with an air outlet pipe; the air collecting hood on the right side of the reforming reactor is connected to the temperature control heat exchanger. The combustion chamber is used to prolong the residence time of the combustible gas in the high temperature zone to ensure that the combustible gas is completely burned in the combustion chamber.
[0028] A number of first tube bundles are installed in the air heater, and the first tube bundle is installed with a first heat transfer fin; a first air inlet pipe is arranged on the top of the air heater; a first air inlet shroud is installed on the top of the first tube bundle, and the first air inlet shroud is connected to the first air inlet pipe; a first air outlet pipe is arranged at the bottom of the air heater; a first air outlet shroud is installed at the bottom of the first tube bundle, and the first air outlet shroud is connected to the first air outlet pipe. The air heater is used to provide high-temperature gas for the battery. External gas enters the first tube bundle through the first air inlet pipe and the first air inlet shroud, and is heated by the high-temperature gas provided by the combustion chamber. The heat of the high-temperature gas is transferred to the first tube bundle through the heat transfer fins. The gas in the first tube bundle is discharged from the first air outlet pipe after being heated for use by the battery. The high-temperature gas used for heating enters the temperature-controlled heat exchanger after absorbing heat and cooling.
[0029] A plurality of second tube bundles are installed in the temperature-controlled heat exchanger, and a second heat transfer fin is installed on the second tube bundle; a second air inlet pipe is arranged on the top of the temperature-controlled heat exchanger; a second air inlet shroud is installed on the top of the second tube bundle, and the second air inlet shroud is connected to the second air inlet pipe; a second air outlet shroud is installed at the bottom of the second tube bundle. A variable frequency fan is installed in the second air inlet shroud. The temperature-controlled heat exchanger adjusts the exhaust gas temperature through the control of the controller, thereby alleviating temperature fluctuations and facilitating the stability of the subsequent reforming reaction. The high-temperature gas from the air heater transfers heat to the air in the second tube bundle through the heat transfer fins, and the controller controls the variable frequency fan to adjust the air flow rate in the second tube bundle. When the frequency of the variable frequency fan increases, the air flow rate entering the second tube bundle increases, thereby increasing the heat exchange amount and reducing the exhaust gas temperature in the temperature-controlled heat exchanger; conversely, when the frequency of the variable frequency fan decreases, the air flow rate entering the second tube bundle decreases, thereby reducing the heat exchange amount and increasing the exhaust gas temperature in the temperature-controlled heat exchanger, thereby achieving temperature regulation.
[0030] A plurality of third tube bundles are installed in the reforming reactor, the third tube bundles are arranged horizontally, and the third heat transfer fins are installed on the third tube bundles; a third air inlet pipe and a third air outlet pipe are arranged on the top of the reforming reactor, the third air inlet pipe is located on the air inlet side of the third tube bundle, and the third air outlet pipe is located on the air outlet side of the third tube bundle. The raw gas enters the third tube bundle through the third air inlet pipe, and the third tube bundle has a built-in catalyst. The high-temperature gas enters the reforming reactor from the temperature-controlled heat exchanger, and the temperature is transferred to the third tube bundle through the heat transfer fins. When the catalyst in the third tube bundle reaches the reaction temperature, the raw gas undergoes a reforming reaction to become a reformed gas, which is discharged through the third air outlet pipe for use by the battery.
[0031] A gas channel is also provided at the bottom of the temperature-controlled heat exchanger, one end of which is connected to the second gas outlet guide cover, and the other end is connected to the gas collecting cover on the right side of the reforming reactor. The high-temperature gas in the reforming reactor enters the gas collecting cover, and at the same time, the air in the second tube bundle of the temperature-controlled heat exchanger enters the gas collecting cover through the gas channel and mixes with the high-temperature gas, and is discharged through the gas outlet pipe for use by subsequent devices.
[0032] An annular air guide plate is embedded inside the igniter. The igniter is equipped with a methanol pipeline, and a methanol nozzle is installed at the port of the methanol pipeline, and the methanol nozzle is located inside the igniter; the methanol pipeline passes through the annular air guide plate, and its port is arranged toward the direction of the combustion chamber. The igniter is equipped with a waste reforming gas pipeline, and a waste reforming gas nozzle is arranged at the port of the waste reforming gas pipeline, and the waste reforming gas nozzle is located inside the igniter; the waste reforming gas pipeline passes through the annular air guide plate. A supplementary methanol pipeline is installed on the side wall of the igniter, and a supplementary methanol nozzle is installed at the port of the supplementary methanol pipeline; the supplementary methanol pipeline passes through the annular air guide plate; and its port is arranged toward the direction of the combustion chamber. Methanol is input into the igniter through the methanol pipeline, atomized and ignited by the methanol nozzle, and at the same time, the fuel tail gas of the battery is sprayed into the igniter through the waste reforming gas pipeline and ignited by the burning atomized methanol. The airflow entering from the air intake duct blows the burning combustible gas into the combustion chamber. Since the combustion chamber prolongs the residence time of the combustible gas in the high temperature zone, the combustible material completes combustion in the combustion chamber and converts all the energy into sensible heat of the air to form high-temperature gas. The high-temperature gas enters the air heater under the action of the rear air pressure.
[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.
[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A new type of methanol reforming device, characterized in that: It includes an igniter, a combustion chamber, an air heater, a temperature-controlled heat exchanger and a reforming reactor. An air inlet pipe is provided on the left side of the igniter, and the combustion chamber is installed on the right side of the igniter; the air heater is installed on the right side of the combustion chamber, the temperature-controlled heat exchanger is installed on the right side of the air heater, and the reforming reactor is installed on the right side of the temperature-controlled heat exchanger; the air heater, the temperature-controlled heat exchanger and the reforming reactor are sealed and connected via an air collecting hood; the air collecting hood located on the right side of the reforming reactor is provided with an air outlet pipe; the air collecting hood on the right side of the reforming reactor is communicated with the temperature-controlled heat exchanger.
2. The novel methanol reforming device according to claim 1 is characterized in that: A plurality of first tube bundles are installed in the air heater, and a first heat transfer fin is installed on the first tube bundle; a first air inlet pipe is arranged on the top of the air heater; a first air inlet guide cover is installed on the top of the first tube bundle, and the first air inlet guide cover is connected to the first air inlet pipe; a first air outlet pipe is arranged at the bottom of the air heater; a first air outlet guide cover is installed at the bottom of the first tube bundle, and the first air outlet guide cover is connected to the first air outlet pipe.
3. The novel methanol reforming device according to claim 1 is characterized in that: A plurality of second tube bundles are installed in the temperature-controlled heat exchanger, and second heat transfer fins are installed on the second tube bundles; a second air inlet pipe is arranged on the top of the temperature-controlled heat exchanger; a second air inlet guide cover is installed on the top of the second tube bundle, and the second air inlet guide cover is connected to the second air inlet pipe; a second air outlet guide cover is installed at the bottom of the second tube bundle.
4. The novel methanol reforming device according to claim 3 is characterized in that: A variable frequency fan is installed in the second air inlet guide cover.
5. The novel methanol reforming device according to claim 1 is characterized in that: A plurality of third tube bundles are installed in the reforming reactor, the third tube bundles are arranged horizontally, and third heat transfer fins are installed on the third tube bundles; a third air inlet pipe and a third air outlet pipe are arranged on the top of the reforming reactor, the third air inlet pipe is located on the air inlet end side of the third tube bundle, and the third air outlet pipe is located on the air outlet end side of the third tube bundle.
6. The novel methanol reforming device according to claim 3 is characterized in that: It also includes a gas channel, one end of which is connected to the second gas outlet guide cover, and the other end of which is connected to the gas collecting cover on the right side of the reforming reactor.
7. The novel methanol reforming device according to claim 1 is characterized in that: An annular air guide plate is embedded inside the igniter.
8. The novel methanol reforming device according to claim 7 is characterized in that: The igniter is equipped with a methanol pipeline, and a methanol nozzle is installed at the end of the methanol pipeline, and the methanol nozzle is located inside the igniter; the methanol pipeline passes through the annular air guide plate, and its end is arranged toward the direction of the combustion chamber.
9. The novel methanol reforming device according to claim 7, characterized in that: The igniter is equipped with a waste reforming gas pipeline, a waste reforming gas nozzle is provided at the port of the waste reforming gas pipeline, and the waste reforming gas nozzle is located inside the igniter; the waste reforming gas pipeline runs through the annular air guide plate.
10. The novel methanol reforming device according to claim 7, characterized in that: A supplementary methanol pipeline is installed on the side wall of the igniter, and a supplementary methanol nozzle is installed on the port of the supplementary methanol pipeline; the supplementary methanol pipeline runs through the annular air guide plate; and its port is arranged toward the direction of the combustion chamber.