SOFC power generation system based on coal gasification

Abstract

The invention provides an SOFC power generation system based on coal gasification, and belongs to the technical field of coal gasification, the SOFC power generation system comprises a coal gasification tank, the coal gasification tank is connected with a gas guide pipe, the gas guide pipe is connected with a filter cover, one side of the coal gasification tank is provided with a power generation box, a solid fuel cell is arranged in the power generation box, and the upper end of the power generation box is provided with a heating box; the oscillation assembly comprises a telescopic air bag, a telescopic rod and a piston cylinder; the heating assembly comprises a heat conduction pipe and a rotating rod; the device has the beneficial effects that a telescopic air bag is heated and expanded to drive a telescopic rod and a piston barrel to move upwards, so that the heating area is increased, the heat conduction effect is improved, in addition, a fan and turbine fan blades drive a rotating rod and a second magnetic block to rotate, the first magnetic block periodically extrudes the upper end of the piston barrel, and then an oscillation sheet promotes liquid to turn over; therefore, diffusion of heat in water is improved, the heat utilization effect is improved, and the heating speed of the water tank is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of coal gasification, and in particular to a SOFC power generation system based on coal gasification. Background Art

[0002] SOFC has a high current density and power density, and the polarization of the anode and cathode is negligible. The polarization loss is concentrated in the resistance drop within the electrolyte. It can directly use hydrogen, hydrocarbons, methanol, etc. as fuel without using precious metals as catalysts, avoiding the corrosion and sealing problems of acid-base electrolytes or molten salt electrolytes in medium and low-temperature fuel cells. It can provide high-quality waste heat, realize cogeneration of heat and power, have high fuel utilization rate, and energy utilization rate of about 80%. It is a clean and efficient energy system.

[0003] In the existing technology, the waste heat boiler is of paramount importance in the power generation system utilizing the waste energy of coal gasification. The waste energy after coal gasification power generation is mainly used to heat the water in the waste heat boiler. The bottom of the waste heat boiler is the flue gas passage area, and the upper part is a water tank. The water in the water tank is heated by the heat-conducting columns in the flue gas passage area. However, at present, when the waste heat boiler is started, most of the water in the water tank is cold water. Waiting for the water to be heated directly through the heat-conducting columns will greatly reduce the heating efficiency. Moreover, the heat-conducting columns can only perform simple heat conduction, so that the water to be heated in the water tank cannot be heated quickly. How to invent a SOFC power generation system based on coal gasification to solve these problems has become an urgent problem to be solved by technicians in this field. Summary of the Invention

[0004] In order to remedy the above shortcomings, the present invention provides a SOFC power generation system based on coal gasification, which aims to solve the problem that waiting for water to be heated directly through a heat-conducting column will greatly reduce the heating efficiency, and the heat-conducting column can only perform simple heat conduction, so that the water to be heated in the water tank cannot be heated quickly.

[0005] The present invention is achieved in that:

[0006] The present invention provides a coal gasification-based SOFC power generation system, comprising a coal gasification tank, the coal gasification tank being connected to an air duct, the air duct being connected to a filter cover, a power generation box being provided on one side of the coal gasification tank, a solid fuel cell being provided inside the power generation box, a heating box being provided at the upper end of the power generation box, and further comprising:

[0007] An oscillating assembly, located above the power generation box, comprising a telescopic airbag, a telescopic rod, and a piston cylinder;

[0008] A heating component is connected to the heating box, and the heating component includes a heat pipe and a rotating rod.

[0009] Preferably, the outer wall of the coal gasification tank is fixedly connected to one end of the gas duct, the other end of the gas duct is fixedly connected to the power generation box, the interior of the power generation box is fixedly connected to the solid fuel cell, the side wall of the solid fuel cell is fixedly connected to the power connection end, and the upper end of the power generation box is fixedly connected to the vertical cylinder.

[0010] Preferably, the oscillation component also includes a waste heat recovery box, the lower end of the waste heat recovery box is fixedly connected to the vertical cylinder, the upper end of the waste heat recovery box is fixedly connected to the heating box, the upper end of the heating box is provided with a water supply pipe, and the side wall of the heating box is fixedly connected with a drainage pipe.

[0011] Preferably, the lower end of the telescopic airbag is fixedly connected to the inner wall of the waste heat recovery box, the upper end of the telescopic airbag is fixedly connected to the telescopic rod, the telescopic rod is in an "I" shape, the upper end of the telescopic rod is slidably connected to the inner wall of the piston cylinder, and the upper end of the piston cylinder vertically penetrates the side walls of the waste heat recovery box and the heating box.

[0012] Preferably, the outer wall of the upper end of the piston cylinder is fixedly connected to a plurality of oscillation plates distributed in a circular array, the end of the oscillation plate away from the piston cylinder is fixedly connected to a fixing ring, and a telescopic spring is provided inside the piston cylinder, and the two ends of the telescopic spring are respectively fixedly connected to the inner wall of the piston cylinder and the upper end of the telescopic rod.

[0013] Preferably, the heat conduction pipe is arranged in an "L" shape, one end of the heat conduction pipe is fixedly connected to the side wall of the waste heat recovery box, the other end of the heat conduction pipe passes through the side wall of the heating box, a fan is provided inside one end of the heat conduction pipe, the other end of the heat conduction pipe is fixedly connected to a return pipe, and the other end of the return pipe is fixedly connected to the side wall of the waste heat recovery box.

[0014] Preferably, the heat pipe is fixedly connected to a limit seat on the outer wall inside the heating box, the limit seat is located directly above the piston cylinder, the limit seat is rotatably connected to a rotating ring, the outer wall of the rotating ring is fixedly connected to a magnetic block 1, and the magnetic block 1 is arranged in a triangular shape.

[0015] Preferably, the inner wall of the heat pipe is fixedly connected to a support plate, the support plate is rotatably connected to a rotating rod, one end of the rotating rod is fixedly connected to a turbine blade, and a second magnetic block is fixedly connected to the outer wall of the rotating rod.

[0016] The beneficial effects of the present invention are:

[0017] After electricity is generated through the solid fuel cell, the remaining gas heat enters the waste heat recovery box. As the heat inside the box increases, the telescopic airbag begins to expand and drives the telescopic rod and the piston cylinder to move upward synchronously, thereby increasing the contact area between the telescopic rod and the piston cylinder and the water inside the heating box, improving the heat conduction effect and the heat utilization effect; and in the process of coal gasification power generation, the fan is started, and the turbine blades drive the rotating rod and the magnetic block 2 to rotate synchronously, thereby causing the magnetic block 1 to rotate around the outer wall of the heat pipe, periodically squeezing the upper end of the piston cylinder, so that the oscillating plate promotes the liquid to flip, thereby increasing the diffusion of heat in the water, thereby improving the heat utilization effect and accelerating the heating speed of the water tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the overall structure of a SOFC power generation system based on coal gasification provided by an embodiment of the present invention;

[0020] Figure 2 Schematic diagram of the fuel cell structure of a SOFC power generation system based on coal gasification provided by an embodiment of the present invention;

[0021] Figure 3 This is a schematic structural diagram of a waste heat recovery box and a heating box of a SOFC power generation system based on coal gasification provided by an embodiment of the present invention;

[0022] Figure 4 This is a schematic structural diagram of a heating component of a SOFC power generation system based on coal gasification provided by an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of an oscillating component of a SOFC power generation system based on coal gasification provided by an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the internal structure of a piston cylinder of a SOFC power generation system based on coal gasification provided by an embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the internal structure of a heat pipe in a SOFC power generation system based on coal gasification provided by an embodiment of the present invention;

[0026] Figure 8The present invention provides a SOFC power generation system based on coal gasification. Figure 7 A magnified schematic diagram of the structure in the middle;

[0027] Figure 9 It is a schematic diagram of the rotating rod structure of a SOFC power generation system based on coal gasification provided by an embodiment of the present invention.

[0028] In the figure: 1. Coal gasification tank; 2. Air guide pipe; 3. Filter cover; 4. Generator box; 41. Vertical cylinder; 5. Oscillation assembly; 51. Waste heat recovery box; 52. Telescopic airbag; 53. Telescopic rod; 54. Piston cylinder; 55. Fixed ring; 56. Oscillation plate; 57. Telescopic spring; 6. Heating assembly; 61. Fan; 62. Heat pipe; 63. Limit seat; 64. Magnetic block 1; 65. Rotating ring; 66. Turbine blade; 67. Support plate; 68. Rotating rod; 69. Magnetic block 2; 7. Water supply pipe; 8. Heating box; 9. Drain pipe; 10. Return pipe; 11. Power terminal; 12. Solid fuel cell. DETAILED DESCRIPTION

[0029] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0030] Example, refer to Figures 1-9 A coal gasification-based SOFC power generation system includes a coal gasification tank 1, the coal gasification tank 1 is connected to an air duct 2, the air duct 2 is connected to a filter cover 3, a power generation box 4 is provided on one side of the coal gasification tank 1, a solid fuel cell 12 is provided inside the power generation box 4, and a heating box 8 is provided at the upper end of the power generation box 4. The system also includes:

[0031] An oscillating assembly 5 is located above the power generation box 4 and includes a telescopic airbag 52, a telescopic rod 53, and a piston cylinder 54;

[0032] The heating component 6 is connected to the heating box 8 , and the heating component 6 includes a heat pipe 62 and a rotating rod 68 .

[0033] Furthermore, the outer wall of the coal gasification tank 1 is fixedly connected to one end of the gas duct 2, the other end of the gas duct 2 is fixedly connected to the power generation box 4, the interior of the power generation box 4 is fixedly connected to the solid fuel cell 12, the side wall of the solid fuel cell 12 is fixedly connected to the power connection terminal 11, and the upper end of the power generation box 4 is fixedly connected to the vertical cylinder 41.

[0034] It should be noted that: the coal is subjected to chemical reactions such as high temperature and high pressure through the coal gasification tank 1, and then converted into combustible gas, which is then discharged to the inside of the power generation box 4 through the air duct 2. Before that, the gas is purified through the filter cover 3 to remove impurities and sulfur therein to ensure the smooth progress of the subsequent power generation process. The filtration and purification process can adopt a low-temperature methanol washing method. This method utilizes the absorption performance of methanol for acidic gases at low temperatures, which can effectively remove impurities such as sulfide and carbon dioxide in the coal gas, thereby improving the purity of the coal gas to ensure the subsequent power generation effect. After the coal gas enters the power generation box 4, the purified synthesis gas enters the solid fuel cell 12 as fuel. On the anode side of the SOFC, the fuel gas (such as hydrogen, carbon monoxide, etc.) undergoes an electrochemical reaction with the oxygen ions transferred through the cathode side to generate water and carbon dioxide, and release electrons. These electrons flow through the external circuit to form an electric current, and are finally discharged from the external wire of the power terminal 11, thereby realizing the output of electrical energy.

[0035] Reference Figure 3 、 Figure 5 and Figure 6 , further; the oscillation assembly 5 also includes a waste heat recovery box 51, the lower end of the waste heat recovery box 51 is fixedly connected to the vertical cylinder 41, the upper end of the waste heat recovery box 51 is fixedly connected to the heating box 8, the upper end of the heating box 8 is provided with a water supply pipe 7, and the side wall of the heating box 8 is fixedly connected to a drain pipe 9; the lower end of the telescopic airbag 52 is fixedly connected to the inner wall of the waste heat recovery box 51, the upper end of the telescopic airbag 52 is fixedly connected to the telescopic rod 53, the telescopic rod 53 is in an "I" shape, the upper end of the telescopic rod 53 is slidably connected to the inner wall of the piston cylinder 54, and the upper end of the piston cylinder 54 vertically penetrates the side walls of the waste heat recovery box 51 and the heating box 8; the outer wall of the upper end of the piston cylinder 54 is fixedly connected to a number of oscillation plates 56 distributed in a circumferential array, and the end of the oscillation plate 56 away from the piston cylinder 54 is fixedly connected to a fixing ring 55, and a telescopic spring 57 is provided inside the piston cylinder 54, and the two ends of the telescopic spring 57 are respectively fixedly connected to the inner wall of the piston cylinder 54 and the upper end of the telescopic rod 53.

[0036] It should be noted that cold water can be added to the interior of the heating box 8 through the water supply pipe 7, and hot water can be discharged by controlling the switch of the drain pipe 9. After electricity is generated through the solid fuel cell 12, the unused gas heat will enter the interior of the waste heat recovery box 51 through the vertical cylinder 41. Then, as the heat gradually increases, the temperature inside the waste heat recovery box 51 begins to rise. When the temperature gradually rises, the gas inside the telescopic airbag 52 begins to expand, causing the upper end of the telescopic airbag 52 to begin to move upward, and at the same time drive the telescopic rod 53 and the piston cylinder 54 to move upward synchronously. The telescopic rod 53 and the piston cylinder 54 are both made of metal and have a good thermal conductivity. Therefore, after the telescopic airbag 52 expands, the contact area between the telescopic rod 53 and the piston cylinder 54 and the water inside the heating box 8 increases, thereby improving the thermal conductivity and the heat utilization effect.

[0037] Reference Figure 4 、 Figure 7 、 Figure 8 and Figure 9 , further; the heat conducting pipe 62 is arranged in an "L" shape, one end of the heat conducting pipe 62 is fixedly connected to the side wall of the waste heat recovery box 51, and the other end of the heat conducting pipe 62 passes through the side wall of the heating box 8. A fan 61 is provided inside the heat conducting pipe 62 at one end, and the other end of the heat conducting pipe 62 is fixedly connected to the return pipe 10, and the other end of the return pipe 10 is fixedly connected to the side wall of the waste heat recovery box 51; the heat conducting pipe 62 is located on the outer wall inside the heating box 8 and is fixedly connected to a limiting seat 63, and the limiting seat 63 is located directly above the piston cylinder 54. The limiting seat 63 is rotatably connected to a rotating ring 65, and the outer wall of the rotating ring 65 is fixedly connected to a magnetic block 1 64, which is arranged in a triangular shape; the inner wall of the heat conducting pipe 62 is fixedly connected to a support plate 67, which is rotatably connected to a rotating rod 68. One end of the rotating rod 68 is fixedly connected to a turbine blade 66, and a magnetic block 2 69 is fixedly connected to the outer wall of the rotating rod 68.

[0038] It should be noted that: during the process of coal gasification power generation, the fan 61 can be started to quickly absorb the gas heat inside the waste heat recovery box 51 into the inside of the heat pipe 62, and then the wind drives the turbine blades 66 to rotate, and then drives the rotating rod 68 and the magnetic block 2 69 to rotate synchronously through the support plate 67. The heat pipe 62 can be made of metal copper material and has anti-magnetic properties. At the same time, because the magnetism of the end of the magnetic block 2 69 away from the rotating rod 68 is different from the magnetism of the end of the magnetic block 1 64 close to the rotating ring 65, the magnetic block 1 64 can be rotated around the outer wall of the heat pipe 62 through the interaction between the magnetic block 1 64 and the magnetic block 2 69. In order to ensure the stability of the magnetic block 1 64 during rotation, the magnetic block 1 64 is rotated around the outer wall of the heat pipe 62 through the interaction between the magnetic block 1 64 and the magnetic block 2 69. The limited rotation connection between the rotating ring 65 and the limiting seat 63 prevents the magnetic block 64 from being separated, and at the same time makes its movement process more stable. When the gas passes through the heat pipe 62, the water source inside the heating box 8 can be heated through the heat pipe 62, thereby reducing heat loss and improving the utilization effect. Finally, the exhaust gas is selectively treated according to the usage situation. If the waste heat utilization rate is high when the internal temperature of the heating box 8 is low, the used gas can be discharged from the end of the heat pipe 62 for treatment. When the internal temperature of the heating box 8 is high, the heat utilization effect is poor. At this time, the end of the heat pipe 62 can be blocked, so that the gas is re-delivered to the inside of the waste heat recovery box 51 through the return pipe 10 for utilization, thereby improving the utilization rate.

[0039] In addition, during the rotation of the magnetic block 64, the upper end of the piston cylinder 54 will be squeezed. At this time, since the rebound effect of the telescopic airbag 52 after expansion due to heat is smaller than the rebound effect of the telescopic spring 57, the piston cylinder 54 slides downward on the telescopic rod 53, causing the telescopic spring 57 to contract. At the same time, the piston cylinder 54 drives the fixed ring 55 and the oscillation plate 56 to move. The fixed ring 55 and the oscillation plate 56 are also made of metal materials with good thermal conductivity, which can improve the utilization effect of waste heat. After the end of the magnetic block 64 is separated from the upper end of the piston cylinder 54, the elastic recovery of the telescopic spring 57 drives the piston cylinder 54 to move upward. In this process, since the oscillation plate 56 is set at a certain inclination angle with the horizontal plane, the liquid will be promoted to be flipped during the reset and upward movement of the oscillation plate 56, thereby increasing the diffusion of heat in the water, thereby improving the utilization effect of heat. As the magnetic block 64 rotates, the oscillation plate 56 can be periodically driven to move back and forth up and down, thereby increasing the oscillation effect of the liquid, thereby improving the heating efficiency.

[0040] The working principle of the SOFC power generation system based on coal gasification is as follows: after power generation is performed by the solid fuel cell 12, the unused heat of the coal gas will enter the interior of the waste heat recovery box 51 through the vertical cylinder 41. Then, as the heat gradually increases, the temperature inside the waste heat recovery box 51 begins to rise. When the temperature gradually rises, the gas inside the telescopic airbag 52 begins to expand, causing the upper end of the telescopic airbag 52 to begin to move upward, and at the same time, driving the telescopic rod 53 and the piston cylinder 54 to move upward synchronously. The telescopic rod 53 and the piston cylinder 54 are both made of metal and have good heat conduction effect. Therefore, after the telescopic airbag 52 expands, the contact area between the telescopic rod 53 and the piston cylinder 54 and the water inside the heating box 8 increases, thereby improving the heat conduction effect and improving the heat utilization effect.

[0041] In addition, during the process of coal gasification power generation, the fan 61 can be started to quickly absorb the gas heat inside the waste heat recovery box 51 into the inside of the heat pipe 62, and then the wind drives the turbine blades 66 to rotate, and then drives the rotating rod 68 and the magnetic block 2 69 to rotate synchronously through the support plate 67. The heat pipe 62 can be made of metal copper material and has anti-magnetic properties. At the same time, because the magnetism of the end of the magnetic block 2 69 away from the rotating rod 68 is different from the magnetism of the end of the magnetic block 1 64 close to the rotating ring 65, the magnetic block 1 64 can be rotated around the outer wall of the heat pipe 62 through the interaction between the magnetic block 1 64 and the magnetic block 2 69. In order to ensure the stability of the magnetic block 1 64 during rotation, the rotating ring The limited rotation connection between 65 and the limit seat 63 prevents the magnetic block 64 from being separated, and at the same time makes its movement process more stable. When the gas passes through the heat pipe 62, the water source inside the heating box 8 can be heated by the heat pipe 62, thereby reducing heat loss and improving the utilization effect. Finally, the tail gas is selectively treated according to the usage situation. If the waste heat utilization rate is high when the internal temperature of the heating box 8 is low, the used gas can be discharged from the end of the heat pipe 62 for treatment. When the internal temperature of the heating box 8 is high, the heat utilization effect is poor. At this time, the end of the heat pipe 62 can be blocked, so that the gas is re-delivered to the inside of the waste heat recovery box 51 through the return pipe 10 for utilization, thereby improving the utilization rate.

[0042] In addition, during the rotation of the magnetic block 64, the upper end of the piston cylinder 54 will be squeezed. At this time, since the rebound effect of the telescopic airbag 52 after expansion due to heat is smaller than the rebound effect of the telescopic spring 57, the piston cylinder 54 slides downward on the telescopic rod 53, causing the telescopic spring 57 to contract. At the same time, the piston cylinder 54 drives the fixed ring 55 and the oscillation plate 56 to move. The fixed ring 55 and the oscillation plate 56 are also made of metal materials with good thermal conductivity, which can improve the utilization effect of waste heat. After the end of the magnetic block 64 is separated from the upper end of the piston cylinder 54, the elastic recovery of the telescopic spring 57 drives the piston cylinder 54 to move upward. In this process, since the oscillation plate 56 is set at a certain inclination angle with the horizontal plane, the liquid will be promoted to be flipped during the reset and upward movement of the oscillation plate 56, thereby increasing the diffusion of heat in the water, thereby improving the utilization effect of heat. As the magnetic block 64 rotates, the oscillation plate 56 can be periodically driven to move back and forth up and down, thereby increasing the oscillation effect of the liquid, thereby improving the heating efficiency.

[0043] It should be noted that the specific model and specifications of the motor need to be selected and determined based on the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0044] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A SOFC power generation system based on coal gasification, comprising a coal gasification tank (1), the coal gasification tank (1) being connected to an air duct (2), the air duct (2) being connected to a filter cover (3), a power generation box (4) being provided on one side of the coal gasification tank (1), a solid fuel cell (12) being provided inside the power generation box (4), a heating box (8) being provided at the upper end of the power generation box (4), characterized in that: Also includes: An oscillating assembly (5), the oscillating assembly (5) being located above the power generation box (4), the oscillating assembly (5) comprising a telescopic airbag (52), a telescopic rod (53) and a piston cylinder (54); A heating component (6), wherein the heating component (6) is connected to a heating box (8), and the heating component (6) comprises a heat conducting pipe (62) and a rotating rod (68).

2. A coal gasification based SOFC power generation system according to claim 1, characterized in that: The outer wall of the coal gasification tank (1) is fixedly connected to one end of the air guide pipe (2), the other end of the air guide pipe (2) is fixedly connected to the power generation box (4), the interior of the power generation box (4) is fixedly connected to the solid fuel cell (12), the side wall of the solid fuel cell (12) is fixedly connected to the power connection end (11), and the upper end of the power generation box (4) is fixedly connected to the vertical cylinder (41).

3. A coal gasification based SOFC power generation system according to claim 2, characterized in that: The oscillation assembly (5) further comprises a waste heat recovery box (51), the lower end of the waste heat recovery box (51) being fixedly connected to the vertical cylinder (41), the upper end of the waste heat recovery box (51) being fixedly connected to the heating box (8), the upper end of the heating box (8) being provided with a water supply pipe (7), and the side wall of the heating box (8) being fixedly connected with a drainage pipe (9).

4. A coal gasification based SOFC power generation system according to claim 3, characterized in that: The lower end of the telescopic airbag (52) is fixedly connected to the inner wall of the waste heat recovery box (51), the upper end of the telescopic airbag (52) is fixedly connected to the telescopic rod (53), the telescopic rod (53) is in an "I" shape, the upper end of the telescopic rod (53) is slidably connected to the inner wall of the piston cylinder (54), and the upper end of the piston cylinder (54) vertically penetrates the side walls of the waste heat recovery box (51) and the heating box (8).

5. A coal gasification based SOFC power generation system according to claim 4, characterized in that: The outer wall of the upper end of the piston cylinder (54) is fixedly connected to a plurality of oscillation plates (56) distributed in a circumferential array, and one end of the oscillation plate (56) away from the piston cylinder (54) is fixedly connected to a fixing ring (55). A telescopic spring (57) is provided inside the piston cylinder (54), and the two ends of the telescopic spring (57) are respectively fixedly connected to the inner wall of the piston cylinder (54) and the upper end of the telescopic rod (53).

6. The SOFC power generation system based on coal gasification according to claim 1, characterized in that: The heat conducting pipe (62) is arranged in an "L" shape, one end of the heat conducting pipe (62) is fixedly connected to the side wall of the waste heat recovery box (51), the other end of the heat conducting pipe (62) passes through the side wall of the heating box (8), a fan (61) is provided inside one end of the heat conducting pipe (62), the other end of the heat conducting pipe (62) is fixedly connected to a return pipe (10), and the other end of the return pipe (10) is fixedly connected to the side wall of the waste heat recovery box (51).

7. The SOFC power generation system based on coal gasification according to claim 1, characterized in that: The heat conducting pipe (62) is fixedly connected to a limiting seat (63) on the outer wall inside the heating box (8); the limiting seat (63) is located directly above the piston cylinder (54); the limiting seat (63) is rotatably connected to a rotating ring (65); the outer wall of the rotating ring (65) is fixedly connected to a magnetic block 1 (64); the magnetic block 1 (64) is arranged in a triangular shape.

8. The SOFC power generation system based on coal gasification according to claim 1, characterized in that: The inner wall of the heat conducting pipe (62) is fixedly connected with a support plate (67), the support plate (67) is rotatably connected with a rotating rod (68), one end of the rotating rod (68) is fixedly connected with a turbine blade (66), and the outer wall of the rotating rod (68) is fixedly connected with a second magnetic block (69).

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