Water, heat and power trigeneration system based on solid oxide fuel cell

Abstract

The present invention discloses a water-heat-electricity trigeneration system based on a solid oxide fuel cell, comprising: a solid oxide fuel cell; a first air preheating device; a second air preheating device; a burner; a reformer; a fuel preheating device; a fuel supply device; a heating device; a hot water tank; a water purification device; and a water purification tank. The water-heat-electricity trigeneration system based on a solid oxide fuel cell according to an embodiment of the present invention can simultaneously provide water, heat, and electricity, and has the advantages of wide applicability and high efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cells, and in particular to a water, heat and power trigeneration system based on solid oxide fuel cells. Background Art

[0002] Electricity and domestic water are essential basic commodities in modern society, and heat is also a common energy requirement in daily life. In modern society, with well-developed infrastructure, these three basic resources are rarely in short supply. However, in some special areas, such as rural and mountainous areas with incomplete infrastructure; islands and border areas with poor transportation; high-altitude and high-latitude areas with harsh climates; and areas particularly affected by disasters, these basic resources are often in short supply.

[0003] The combined power generation system in related technologies is difficult to meet all the supply needs of water, heat and electricity at the same time, and is greatly affected by the environment and has low efficiency. Summary of the Invention

[0004] The present invention aims to address at least one of the technical problems existing in the prior art. To this end, the present invention proposes a water-heat-power trigeneration system based on a solid oxide fuel cell. This solid oxide fuel cell-based water-heat-power trigeneration system can simultaneously provide water, heat, and power, and has the advantages of strong applicability and high efficiency.

[0005] To achieve the above-mentioned objectives, according to an embodiment of the present invention, a water, heat and power trigeneration system based on a solid oxide fuel cell is proposed, and the water, heat and power trigeneration system based on a solid oxide fuel cell includes: a solid oxide fuel cell, wherein the solid oxide fuel cell has a battery air inlet, a battery hydrogen inlet, a battery anode outlet and a battery cathode outlet; a first air preheating device, wherein the first air preheating device has a first preheating air inlet, a first preheating air outlet, a first preheating flue gas inlet and a first preheating flue gas outlet, and the first preheating air inlet is connected to an air source; a second air preheating device, wherein the second air preheating device has a second preheating air inlet, a second preheating air outlet, a second preheating cathode inlet and a second preheating cathode outlet , the second preheated air inlet is connected to the first preheated air outlet, and the second preheated cathode inlet is connected to the battery cathode outlet; a burner, the burner having a burner anode inlet, a burner cathode inlet and a burner flue gas outlet, the burner anode inlet is connected to the battery anode outlet, and the burner cathode inlet is connected to the second preheated cathode outlet; a reformer, the reformer having a reformer flue gas inlet, a reformer flue gas outlet, a reforming inlet and a reforming outlet, the reformer flue gas inlet is connected to the burner flue gas outlet, and the battery anode outlet is connected to the reforming inlet; a fuel preheating device, the fuel preheating device having a fuel inlet, a fuel outlet, a fuel preheating flue gas inlet and a fuel preheating flue gas outlet, The fuel preheating flue gas inlet is connected to the reformer flue gas outlet, and the fuel outlet is connected to the reforming inlet; a fuel supply device, the fuel supply device is connected to the fuel inlet to supply fuel to the fuel inlet; a first waste heat recovery device, the first waste heat recovery device has a heating inlet, a heating outlet, a first recovered flue gas inlet and a first recovered flue gas outlet, the first recovered flue gas inlet is connected to the reformer flue gas outlet; a heating device, the heating device is connected to the heating inlet and the heating outlet respectively; a second waste heat recovery device, the second waste heat recovery device has a clean water inlet, a hot water outlet, a second recovered flue gas inlet and a second recovered flue gas outlet, the second recovered flue gas inlet is connected to the first recovered flue gas outlet; a heat Water tank, the hot water tank is connected to the hot water outlet; a third waste heat recovery device, the third waste heat recovery device has a rain and snow inlet, a snow melting outlet, a third recovered flue gas inlet and a third recovered flue gas outlet, the third recovered flue gas inlet is connected to the second recovered flue gas outlet; a water purification device, the snow melting outlet is connected to the clean water inlet through the water purification device; a water-gas separator, the water-gas separator has a separator inlet, a separator exhaust port and a separator drain port, the separator inlet is connected to the third recovered flue gas outlet, and the separator exhaust port is connected to the atmosphere; a clean water tank, the clean water tank has a clean water tank inlet and a clean water tank outlet, the clean water tank inlet is connected to the separator drain port, and the clean water tank outlet is connected to the fuel inlet.

[0006] The water, heat and power trigeneration system based on a solid oxide fuel cell according to an embodiment of the present invention can simultaneously realize water, heat and power trigeneration, and has the advantages of strong applicability and high efficiency.

[0007] In addition, the water, heat and power trigeneration system based on solid oxide fuel cells according to the above embodiment of the present invention may also have the following additional technical features:

[0008] According to one embodiment of the present invention, the water, heat and power trigeneration system based on solid oxide fuel cells further includes a three-way diverter valve, which is connected to the reforming inlet, the battery anode outlet and the burner anode inlet respectively.

[0009] According to one embodiment of the present invention, the water, heat and power trigeneration system based on solid oxide fuel cells further includes a mixer, which is respectively connected to the fuel outlet, the reforming inlet and the battery anode outlet.

[0010] According to one embodiment of the present invention, the first preheated air inlet is connected to a blower.

[0011] According to one embodiment of the present invention, the fuel supply device is a fuel pump.

[0012] According to one embodiment of the present invention, a first water pump is connected between the clean water tank outlet and the fuel inlet.

[0013] According to one embodiment of the present invention, a second water pump is connected between the snow melting outlet and the water purification device.

[0014] According to one embodiment of the present invention, the burner is provided in the reformer.

[0015] According to one embodiment of the present invention, the heating device is a radiator.

[0016] According to one embodiment of the present invention, the fuel is methanol fuel.

[0017] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0019] Figure 1 3 is a schematic structural diagram of a water, heat and power trigeneration system based on a solid oxide fuel cell according to an embodiment of the present invention.

[0020] Figure numerals: water, heat and power trigeneration system based on solid oxide fuel cell 1, solid oxide fuel cell 10, first air preheating device 20, second air preheating device 30, burner 40, reformer 50, fuel preheating device 60, fuel supply device 70, first waste heat recovery device 80, heating device 90, second waste heat recovery device 100, hot water tank 110, third waste heat recovery device 120, water purification device 130, water-gas separator 140, clean water tank 150, three-way diverter valve 160, mixer 170, blower 180, first water pump 190, second water pump 200, rain and snow 2. DETAILED DESCRIPTION

[0021] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 limiting the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0023] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0024] The following describes a water, heat and power trigeneration system 1 based on a solid oxide fuel cell according to an embodiment of the present invention with reference to the accompanying drawings.

[0025] like Figure 1As shown, the water, heat and power trigeneration system 1 based on solid oxide fuel cells according to an embodiment of the present invention includes a solid oxide fuel cell 10, a first air preheating device 20, a second air preheating device 30, a burner 40, a reformer 50, a fuel preheating device 60, a fuel supply device 70, a first waste heat recovery device 80, a heating device 90, a second waste heat recovery device 100, a hot water tank 110, a third waste heat recovery device 120, a water purification device 130, a water-gas separator 140 and a clean water tank 150.

[0026] The solid oxide fuel cell 10 has a cell air inlet, a cell hydrogen inlet, a cell anode outlet, and a cell cathode outlet. Hydrogen entering from the cell hydrogen inlet and oxygen entering from the cell air inlet react chemically within the solid oxide fuel cell 10 to generate electricity and water.

[0027] The first air preheating device 20 has a first preheated air inlet, a first preheated air outlet, a first preheated flue gas inlet, and a first preheated flue gas outlet. The first preheated air inlet is connected to an air source. Air passing through the first preheated air inlet and the first preheated air outlet is suitable for heat exchange with flue gas passing through the first preheated flue gas inlet and the first preheated flue gas outlet.

[0028] The second air preheating device 30 has a second preheated air inlet, a second preheated air outlet, a second preheated cathode inlet, and a second preheated cathode outlet. The second preheated air inlet is connected to the first preheated air outlet, and the second preheated cathode inlet is connected to the battery cathode outlet. The air passing through the second preheated air inlet and the second preheated air outlet is suitable for heat exchange with the fluid passing through the second preheated cathode inlet and the second preheated cathode outlet.

[0029] The burner 40 has a burner anode inlet, a burner cathode inlet, and a burner flue gas outlet. The burner anode inlet is connected to the battery anode outlet, and the burner cathode inlet is connected to the second preheating cathode outlet. Hydrogen and oxygen entering the burner 40 through the burner anode inlet and the burner cathode inlet are suitable for combustion within the burner 40 to produce high-temperature flue gas.

[0030] The reformer 50 has a reformer flue gas inlet, a reformer flue gas outlet, a reforming inlet, and a reforming outlet. The reformer flue gas inlet is connected to the burner flue gas outlet, and the battery anode outlet is connected to the reforming inlet. Fuel and water entering through the reforming inlet undergo a chemical reaction within the reformer 50 to produce hydrogen and carbon dioxide. Flue gas passing through the reformer flue gas inlet and the reformer flue gas outlet provides a suitable temperature for the reactions in the reformer 50.

[0031] The fuel preheating device 60 has a fuel inlet, a fuel outlet, a fuel preheating flue gas inlet, and a fuel preheating flue gas outlet. The fuel preheating flue gas inlet is connected to the reformer flue gas outlet, and the fuel outlet is connected to the reformer inlet. The fuel passing through the fuel inlet and fuel outlet is suitable for heat exchange with the flue gas passing through the fuel preheating flue gas inlet and the fuel preheating flue gas outlet.

[0032] The fuel supply device 70 is in communication with the fuel inlet to supply fuel to the fuel inlet.

[0033] The first waste heat recovery device 80 has a heating inlet, a heating outlet, a first recovered flue gas inlet, and a first recovered flue gas outlet. The first recovered flue gas inlet is connected to the reformer flue gas outlet. Heating water passing through the heating inlet and the heating outlet is suitable for heat exchange with the flue gas passing through the first recovered flue gas inlet and the first recovered flue gas outlet.

[0034] The heating device 90 is communicated with the heating inlet and the heating outlet respectively.

[0035] The second waste heat recovery device 100 has a clean water inlet, a hot water outlet, a second recovered flue gas inlet, and a second recovered flue gas outlet, wherein the second recovered flue gas inlet is connected to the first recovered flue gas outlet. Water passing through the clean water inlet and the hot water outlet is suitable for heat exchange with flue gas passing through the second recovered flue gas inlet and the second recovered flue gas outlet.

[0036] The hot water tank 110 is communicated with the hot water outlet.

[0037] The third waste heat recovery device 120 has a rain and snow inlet, a snow melting outlet, a third recovered flue gas inlet, and a third recovered flue gas outlet. The third recovered flue gas inlet is connected to the second recovered flue gas outlet. Rain and snow 2 collected from the environment is added to the third waste heat recovery device 120 through the rain and snow inlet. Flue gas passing through the third recovered flue gas inlet and the third recovered flue gas outlet is suitable for heat exchange with the rain and snow in the third waste heat recovery device 120, thereby melting the snow and heating the lower-temperature rainwater and snowwater.

[0038] The snow melting outlet is connected to the clean water inlet through a water purification device 130. The water purification device 130 is suitable for filtering and purifying the water discharged from the snow melting outlet.

[0039] The moisture separator 140 has a separator inlet, a separator exhaust port, and a separator drain port. The separator inlet is connected to the third recovered flue gas outlet, and the separator exhaust port is connected to the atmosphere. The moisture separator 140 is adapted to separate moisture from fluid entering through the separator inlet, allowing the separated gas to be discharged into the atmosphere through the separator exhaust port, and the separated liquid to be discharged through the separator drain port.

[0040] The clean water tank 150 has a clean water tank inlet and a clean water tank outlet. The clean water tank inlet is communicated with the separator drain port, and the clean water tank outlet is communicated with the fuel inlet.

[0041] Reference below Figure 1 The working process of the water, heat and power trigeneration system 1 based on solid oxide fuel cells according to an embodiment of the present invention is described.

[0042] like Figure 1 As shown by the middle arrow a, the air from the air source passes through the first air preheating device 20 and the second air preheating device 30 in sequence to complete primary preheating and secondary preheating, and is heated to the set temperature. Then, the air enters the cathode of the solid oxide fuel cell 10 through the battery air inlet to participate in the reaction. The cathode exhaust gas after the reaction is discharged through the battery cathode outlet, first enters the second air preheating device 30 to provide heat for the secondary preheating of the air, performs heat exchange with the air, preheats the air and recovers heat from the cathode exhaust gas, and then enters the burner 40 to participate in combustion.

[0043] like Figure 1 As shown by arrow b in the figure, the fuel is supplied by the fuel supply device 70, mixed with the water discharged from the clean water tank 150, and then enters the fuel preheating device 60 for preheating to a set temperature; thereafter, it is mixed again with the anode tail gas discharged from the cell anode outlet of the solid oxide fuel cell 10, and enters the reformer 50 for catalytic reforming, where methanol and water are chemically reacted to generate a reformed gas containing hydrogen and carbon dioxide; the reformed gas enters the anode of the solid oxide fuel cell 10 through the cell hydrogen inlet to participate in the reaction.

[0044] The chemical reaction between hydrogen and oxygen in the solid oxide fuel cell 10 generates water and discharges electricity, thereby realizing the power supply function of the water-heat-power trigeneration system 1 based on the solid oxide fuel cell.

[0045] like Figure 1 As shown by the arrow c in FIG, the cell anode outlet of the solid oxide fuel cell 10 is connected to the burner 40 and the reformer 50 respectively. The anode product discharged from the cell anode outlet is split into two parts. One part flows to the reformer 50 and participates in the reforming reaction again to improve the fuel utilization rate of the system; the other part enters the burner 40 for combustion. The high-temperature flue gas generated by the combustion in the burner 40 is passed into other devices of the water-heat-power trigeneration system 1 to provide a heat source and maintain the operating temperature of other components of the water-heat-power trigeneration system 1.

[0046] Specifically, if Figure 1As shown by arrow d in FIG, the high-temperature flue gas generated by the burner 40 first provides heat to the reformer 50 to maintain the energy and operating temperature required for the reforming reaction. The high-temperature flue gas then passes through the fuel preheating device 60 to provide heat for preheating the fuel, heating the fuel to maintain the temperature required for the reaction of the solid oxide fuel cell 10. The flue gas passing through the fuel supply device 70 passes through the first air preheating device 20 to provide heat for preheating the air, heating the air to maintain the temperature required for the reaction of the solid oxide fuel cell 10. The flue gas then enters the first waste heat recovery device 80 to recover a large amount of waste heat, as shown in FIG. Figure 1 As shown by arrow e in FIG, heating water circulates between the heating device 90 and the first waste heat recovery device 80. The heating water in the first waste heat recovery device 80 exchanges heat with the flue gas, heating the heating water so that the heating device 90 can supply heat to the outside, thus achieving external heating of the system. The flue gas passing through the first waste heat recovery device 80 enters the second waste heat recovery device 100 to heat the purified water discharged from the water purification device 130. The flue gas then enters the third waste heat recovery device 120, heating the rain and snow in the third waste heat recovery device 120, melting the accumulated snow and heating the low-temperature snow and rain water. Finally, the flue gas passes through the water-gas separator 140 to separate the water from the gas. The gas is discharged into the atmosphere, while the separated water flows into the clean water tank 150 for storage. The clean water stored in the clean water tank 150 can be mixed with fuel and fed into the reformer 50, or it can be used as domestic water.

[0047] like Figure 1 As shown by the arrow f in the figure, the rain and snow 2 exchanges heat with the flue gas in the third waste heat recovery device 120 to melt and heat the accumulated snow, and then becomes clean water after being filtered and purified by the water purification device 130. Subsequently, the clean water continues to heat up under the heating of the second waste heat recovery device 100 to realize hot water for daily use and flows into the hot water tank 110 for storage, thereby realizing the supply of domestic hot water to the outside world.

[0048] According to an embodiment of the present invention, the water-heat-power trigeneration system 1 based on a solid oxide fuel cell utilizes hydrogen generated by fuel reforming to participate in the discharge reaction of the solid oxide fuel cell 10 to realize power supply, utilizes the combustion of unconsumed hydrogen in the solid oxide fuel cell 10 to generate heat to heat various components of the water-heat-power trigeneration system 1 and to supply heat to the outside, and utilizes the processing of rain and snow and the separation and utilization of moisture in flue gas to realize the supply of domestic water, heat and power, thereby realizing the function of water-heat-power trigeneration, so that the water-heat-power trigeneration system 1 based on a solid oxide fuel cell can simultaneously meet the supply needs of water, heat and electricity.

[0049] Furthermore, by providing the solid oxide fuel cell 10, since the solid oxide fuel cell 10 has very low requirements for the working environment, the water, heat and power trigeneration system 1 based on the solid oxide fuel cell can be operated under various complex and harsh climatic conditions, and has greater applicability.

[0050] In addition, the water, heat and power trigeneration system 1 based on solid oxide fuel cells can adjust the operating conditions of the water supply, heat supply and power supply modules according to changes in the user's electrical load, heat load and water consumption, and can meet different water, heat and power needs in different scenarios.

[0051] Furthermore, by recycling the cathode and anode tail gases of the fuel cell stack, recovering the heat of the combustion flue gas at multiple levels, and self-circulating water, the utilization rates of fuel, heat and water can be fully improved, and the efficiency of the water-heat-power trigeneration system 1 based on solid oxide fuel cells can be improved, thereby realizing a flexible and efficient supply of water, heat and electricity to the outside world.

[0052] Therefore, the water, heat and power trigeneration system 1 based on solid oxide fuel cells according to the embodiment of the present invention can simultaneously realize water, heat and power trigeneration, and has the advantages of strong applicability and high efficiency.

[0053] The following describes a water, heat and power trigeneration system 1 based on a solid oxide fuel cell according to a specific embodiment of the present invention with reference to the accompanying drawings.

[0054] In some specific embodiments of the present invention, Figure 1 As shown, the water, heat and power trigeneration system 1 based on solid oxide fuel cells according to an embodiment of the present invention includes a solid oxide fuel cell 10, a first air preheating device 20, a second air preheating device 30, a burner 40, a reformer 50, a fuel preheating device 60, a fuel supply device 70, a first waste heat recovery device 80, a heating device 90, a second waste heat recovery device 100, a hot water tank 110, a third waste heat recovery device 120, a water purification device 130, a water-gas separator 140 and a clean water tank 150.

[0055] Specifically, if Figure 1 As shown, the water, heat and power trigeneration system 1 based on a solid oxide fuel cell further includes a three-way diverter valve 160, which is connected to the reforming inlet, the battery anode outlet, and the burner anode inlet, respectively. This facilitates the communication between the reforming inlet, the battery anode outlet, and the burner anode inlet.

[0056] More specifically, if Figure 1 As shown, the water, heat and power trigeneration system 1 based on a solid oxide fuel cell further includes a mixer 170, which is connected to the fuel outlet, the reforming inlet, and the cell anode outlet. This facilitates the thorough mixing of the fuel and water in the mixer 170, facilitating the subsequent reforming process.

[0057] Alternatively, as Figure 1As shown, the first preheated air inlet is connected to a blower 180. In this way, the blower 180 can be used to directly pressurize the air in the environment and send it to the first air preheating device 20, which facilitates the supply of air.

[0058] Furthermore, the fuel supply device 70 is a fuel pump, which can be used to pump the fuel to the fuel preheating device 60.

[0059] Figure 1 The following shows a water, heat and power trigeneration system 1 based on a solid oxide fuel cell according to some examples of the present invention. Figure 1 As shown, a first water pump 190 is connected between the clean water tank outlet and the fuel inlet. In this way, the first water pump 190 can be used to pump the water in the clean water tank 150 to the reformer 50.

[0060] Specifically, if Figure 1 As shown, a second water pump 200 is connected between the snow melting outlet and the water purification device. In this way, the second water pump 200 can be used to pump the snow water or rain water in the third waste heat recovery device 120 to the water purification device 130, so that the water purification device 130 can purify the snow water or rain water.

[0061] Advantageously, the burner 40 is disposed inside the reformer 50 . This allows the heat generated by the burner 40 to heat the reformer 50 , so as to maintain the heat required by the reformer 50 .

[0062] Optionally, the heating device 90 is a radiator. This can facilitate the heating device 90 to provide heat outside.

[0063] In some embodiments, the fuel is methanol fuel, which can be reformed with water to generate hydrogen and carbon dioxide to provide hydrogen required for the power generation reaction of the solid oxide fuel cell 10 .

[0064] Of course, the fuel may also be other types that can provide raw materials for the power generation reaction of the solid oxide fuel cell 10 through a reforming process.

[0065] Other structures and operations of the water, heat and power trigeneration system 1 based on a solid oxide fuel cell according to an embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0066] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0067] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A water, heat and power trigeneration system based on solid oxide fuel cells, characterized in that: include: A solid oxide fuel cell having a cell air inlet, a cell hydrogen inlet, a cell anode outlet, and a cell cathode outlet; a first air preheating device, the first air preheating device having a first preheated air inlet, a first preheated air outlet, a first preheated flue gas inlet and a first preheated flue gas outlet, the first preheated air inlet being in communication with an air source; a second air preheating device, the second air preheating device having a second preheating air inlet, a second preheating air outlet, a second preheating cathode inlet and a second preheating cathode outlet, the second preheating air inlet being connected to the first preheating air outlet, and the second preheating cathode inlet being connected to the battery cathode outlet; a burner, the burner having a burner anode inlet, a burner cathode inlet and a burner flue gas outlet, the burner anode inlet being in communication with the battery anode outlet, the burner cathode inlet being in communication with the second preheating cathode outlet; a reformer, the reformer having a reformer flue gas inlet, a reformer flue gas outlet, a reforming inlet, and a reforming outlet, the reformer flue gas inlet being in communication with the burner flue gas outlet, and the battery anode outlet being in communication with the reforming inlet; a fuel preheating device, the fuel preheating device having a fuel inlet, a fuel outlet, a fuel preheating flue gas inlet and a fuel preheating flue gas outlet, the fuel preheating flue gas inlet being connected to the reformer flue gas outlet, and the fuel outlet being connected to the reformer inlet; a fuel supply device in communication with the fuel inlet to supply fuel to the fuel inlet; a first waste heat recovery device, the first waste heat recovery device having a heating inlet, a heating outlet, a first recovered flue gas inlet and a first recovered flue gas outlet, the first recovered flue gas inlet being in communication with the reformer flue gas outlet; a heating device, the heating device being in communication with the heating inlet and the heating outlet respectively; a second waste heat recovery device, the second waste heat recovery device having a clean water inlet, a hot water outlet, a second recovered flue gas inlet and a second recovered flue gas outlet, the second recovered flue gas inlet being connected to the first recovered flue gas outlet; a hot water tank, the hot water tank being in communication with the hot water outlet; a third waste heat recovery device, the third waste heat recovery device having a rain and snow inlet, a snow melting outlet, a third recovered flue gas inlet and a third recovered flue gas outlet, the third recovered flue gas inlet being connected to the second recovered flue gas outlet; a water purification device, wherein the snow melting outlet is connected to the water purification inlet through the water purification device; a water-gas separator, the water-gas separator comprising a separator inlet, a separator exhaust port, and a separator drain port, the separator inlet being in communication with the third recovered flue gas outlet, and the separator exhaust port being in communication with the atmosphere; A clean water tank is provided with a clean water tank inlet and a clean water tank outlet, wherein the clean water tank inlet is communicated with the separator drain port, and the clean water tank outlet is communicated with the fuel inlet.

2. The water, heat and power trigeneration system based on solid oxide fuel cells according to claim 1, characterized in that: It also includes a three-way diverter valve, which is connected to the reforming inlet, the battery anode outlet and the burner anode inlet respectively.

3. The water, heat and power trigeneration system based on solid oxide fuel cells according to claim 1, characterized in that: A mixer is also included, the mixer being in communication with the fuel outlet, the reforming inlet, and the cell anode outlet, respectively.

4. The water, heat and power trigeneration system based on solid oxide fuel cells according to claim 1, characterized in that: The first preheated air inlet is connected to a blower.

5. The water, heat and power trigeneration system based on solid oxide fuel cells according to claim 1, characterized in that: The fuel supply device is a fuel pump.

6. The water, heat and power trigeneration system based on solid oxide fuel cells according to claim 1, characterized in that: A first water pump is connected between the clean water tank outlet and the fuel inlet.

7. The water, heat and power trigeneration system based on solid oxide fuel cells according to claim 1, characterized in that: A second water pump is connected between the snow melting outlet and the water purification device.

8. The water, heat and power trigeneration system based on solid oxide fuel cells according to claim 1, characterized in that: The burner is disposed in the reformer.

9. The water, heat and power trigeneration system based on solid oxide fuel cells according to claim 1, characterized in that: The heating device is a radiator.

10. The water, heat and power trigeneration system based on solid oxide fuel cells according to claim 1, characterized in that: The fuel is methanol fuel.

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