A pressurized fluidized bed combustion system and method

Abstract

The present invention discloses a pressurized fluidized bed combustion system and method, which belongs to the technical field of fluidized bed combustion equipment, including a combustion box body, wherein a first partition plate and a second partition plate are provided in the combustion box body, and three placement grooves are opened on the left side of the inner wall of the combustion box body, and a movable turbulent air outlet device is provided in the placement groove; in the present invention, a movable extension plate, a cross bar, a contact rod, a piston cylinder, a first air outlet nozzle, a movable extrusion plate, a drive assembly and a reciprocating screw are adopted, and multiple movable extension plates are rotated slightly, which improves the flexibility of airflow guidance and avoids the airflow rising straight up and hitting the upper side of the inner wall of the combustion box body. The gas in the air storage box is sprayed along multiple angles through the first exhaust pipe, the first pressure relief valve and the first air outlet nozzle, providing secondary supplement for the gas and fuel in the combustion box body, and the airflow with a changed angle promotes the mixing of gas and fuel, making the combustion more complete and efficient.

Description

Technical Field

[0001] The present invention belongs to the technical field of fluidized bed combustion equipment, and in particular relates to a pressurized fluidized bed combustion system and method. Background Art

[0002] Pressurized fluidized bed reactor is a fluidized bed reactor operated under pressurized conditions. It is widely used in chemical industry, energy and environmental protection.

[0003] For example, a Chinese patent with publication number CN106196023B discloses a clean combustion coal-fired circulating fluidized bed boiler, which is characterized by including a circulating fluidized bed furnace body component, a high-temperature flue gas settling purification chamber, a heat exchange system, and a calcium injection system component. The resultant calcium sulfate salt particles and other smoke dust violently collide under the action of gravity and deflection walls, lose kinetic energy, and fall into the purification chamber. Under high temperature conditions, they melt into molten Newtonian fluid-like ash covering the surface of the purification chamber. Smaller particles violently collide under the action of gravity and deflection walls, lose kinetic energy, and fall into the purification chamber. The surface tension of the molten Newtonian fluid of the molten ash is used to adhere to particles with smaller diameters, thereby solving the common problem in the field of industrial boiler technology that the heating surface metal is worn by the erosion of high-speed flue gas carrying particles.

[0004] Disadvantages of existing technologies: In current pressurized fluidized bed combustion systems, fuel particles are carried by rising gas during the combustion process and flow in the bed to achieve relatively complete combustion. However, there are some technical challenges and limitations. Specifically, when the fuel particles move at high speed with the gas, they will inevitably collide with the side walls of the combustion chamber. This repeated collision along a fixed flow path can easily lead to serious wear problems on the inner wall of the combustion chamber at specific positions. In addition, since the distribution of fuel particles in the gas is often not uniform, this not only affects the overall improvement of combustion efficiency, but may also cause some fuel particles to fail to burn completely, thereby reducing the energy conversion efficiency of the entire system.

[0005] Based on this, the present invention designs a pressurized fluidized bed combustion system and method to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to propose a pressurized fluidized bed combustion system and method to solve the problem that it affects the overall improvement of combustion efficiency and may also cause some fuel particles to fail to burn completely, thereby reducing the energy conversion efficiency of the entire system.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] The cam is connected to the second exhaust pipe and the second exhaust pipe is connected to the exhaust pipe of the gas outlet, and the exhaust pipe is connected to the second exhaust pipe on the inner wall of the combustion chamber.

[0009] As a further description of the above technical solution:

[0010] A control door is provided on the front of the combustion box body, a loading bed plate is provided in the combustion box body, a feed port is provided on the left side of the combustion box body at the upper side of the loading bed plate, and an air outlet pipe is provided on the right side of the combustion box body.

[0011] As a further description of the above technical solution:

[0012] A return pipe is provided under the combustion box body, and the position of the return pipe corresponds to the position of the second partition. The first partition and the second partition divide the space in the combustion box body into a serpentine shape. A second pressure relief valve is provided outside the second exhaust pipe, and a first pressure relief valve is provided outside the first exhaust pipe.

[0013] As a further description of the above technical solution:

[0014] The movable spoiler and air outlet device includes a movable extension plate located in the placement groove, a pin shaft hinged in the placement groove is passed through the side of the movable extension plate, a rubber connecting pad is fixedly connected to the left side of the movable extension plate, and the rubber connecting pad is connected in the placement groove, a first elastic component is fixedly connected to the left side of the movable extension plate, and the first elastic component is connected in the placement groove, a first air outlet nozzle is provided on the right side of the movable extension plate, the movable extension plate is set to be hollow, the first exhaust pipe is connected to the first air outlet nozzle through the movable extension plate, and the movable extension plate is arranged on the side of the movable extrusion device and the extrusion inflation device.

[0015] As a further description of the above technical solution:

[0016] The movable extrusion device includes a linear bearing passing through the side of the combustion box body, a cross bar is slidably connected in the linear bearing, the cross bar is slidably connected to the side of the movable extension plate, and the side of the cross bar located outside the combustion box body is provided with an extension ring, and the outer sleeve of the cross bar is provided with a second elastic component, and the two ends of the second elastic component are respectively fixedly connected to the linear bearing and the extension ring.

[0017] As a further description of the above technical solution:

[0018] The movable extrusion device includes a movable extrusion plate, and the front and rear sides of the movable extrusion plate are respectively fixedly connected to a first side plate and a second side plate, a connecting sleeve is connected through the first side plate, a guide rod is slidably connected in the connecting sleeve, both ends of the guide rod are fixedly connected to a fixed plate, the fixed plate is fixedly connected to the side of the combustion box body, and a threaded cap is connected through the second side plate.

[0019] As a further description of the above technical solution:

[0020] A reciprocating screw is provided in the threaded cap, the top of the reciprocating screw is provided with an axle seat connected to the side of the combustion box body, the bottom end of the reciprocating screw is fixedly connected to a drive assembly, and the drive assembly is fixedly connected to the side of the combustion box body. A protrusion is provided on the side of the movable extrusion plate close to the combustion box body.

[0021] As a further description of the above technical solution:

[0022] The extrusion inflation device includes a piston cylinder, two fixed rods are fixedly connected to the side of the piston cylinder, the fixed rods are fixedly connected to the side of the combustion box body, a piston plate is slidably connected in the piston cylinder, a contact rod is fixedly connected to the side of the piston plate, the contact rod is slidably connected to the side of the movable extension plate, the contact rod passes through and is slidably connected to the side of the piston cylinder, a guide sleeve is provided on the outer sleeve of the contact rod, and the guide sleeve passes through and is connected to the side of the combustion box body.

[0023] As a further description of the above technical solution:

[0024] The contact rod outer sleeve is provided with a third elastic component, and the two ends of the third elastic component are fixedly connected to the piston plate and the inner wall of the piston cylinder respectively. The left side of the piston cylinder is connected to a one-way air outlet valve and a one-way air inlet valve, and the one-way air outlet valve is connected to the air inlet pipe.

[0025] A method for using a pressurized fluidized bed combustion system, comprising the following steps:

[0026] Fuel is placed on the loading bed of the combustion box. Then, ignition is started under the loading bed and air is blown upward. The airflow causes the fuel particles to float upward in the combustion box. The drive assembly is started, and the reciprocating screw controls the upward movement of the threaded cap, the second side plate, and the movable extrusion plate. During the upward movement of the movable extrusion plate, the raised portion on its side squeezes the crossbar, causing the crossbar to move to the right. The rightward movement of the crossbar causes the movable extension plate to rotate to the right. This rotation stretches the rubber connecting pad.

[0027] The rotation of the movable extension plate blocks and guides the gas and fuel flowing upward on the leftmost side of the combustion box, causing the airflow direction to shift to the right. The multiple movable extension plates rotate slightly, which improves the flexibility of airflow guidance and prevents the airflow from rising straight up and hitting the upper side of the inner wall of the combustion box. During the rightward rotation of the movable extension plate, the degree of squeezing of the contact rod is reduced. The third elastic component controls the piston plate to reset to the right. The piston plate draws external gas into the piston cylinder through the one-way air inlet valve. The contact rod is squeezed and moved by the reset movable extension plate, squeezing the gas in the piston cylinder through the piston plate. The gas then enters the air storage box through the one-way air outlet valve.

[0028] The gas in the gas storage box is sprayed at multiple angles through the first exhaust pipe, the first pressure relief valve and the first air outlet nozzle, providing secondary replenishment for the gas and fuel in the combustion box. The airflow with changed angles promotes the mixing of gas and fuel, making the combustion more complete and efficient. The gas in the gas storage box is sprayed out through the second exhaust pipe, the second pressure relief valve and the second air outlet nozzle, exerting a recoil force on the upward-flowing gas and fuel. The recoil effect effectively reduces the impact wear rate of fuel particles on the upper side wall of the combustion box. The combustion process is optimized, ensuring the complete combustion of the fuel and reducing the wear of the combustion box.

[0029] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0030] 1. The present invention comprises a movable extension plate, a cross bar, a contact rod, a piston cylinder, a first air outlet nozzle, a movable extrusion plate, a drive assembly and a reciprocating screw. The drive assembly controls the threaded cap, the second side plate and the movable extrusion plate to move upward through the reciprocating screw. During the upward movement of the movable extrusion plate, the raised portion on the side squeezes the cross bar, causing the cross bar to move to the right. The rightward movement of the cross bar prompts the movable extension plate to rotate to the right. The rotation of the movable extension plate blocks and guides the gas and fuel flowing upward on the leftmost side of the combustion box, causing the airflow direction to shift to the right. The slight rotation of the multiple movable extension plates improves the flexibility of the airflow guidance and prevents the airflow from rising straight up and hitting the upper side of the inner wall of the combustion box.

[0031] 2. In the present invention, a piston cylinder is used, and the gas in the gas storage box is ejected at multiple angles through the first exhaust pipe, the first pressure relief valve and the first gas outlet nozzle. The high-pressure gas is ejected at multiple angles into between the gas and the fuel. The gas and fuel particles are impacted and mixed by the injected gas. The gas blown into the combustion box provides secondary supplement for the gas and fuel in the combustion box. The airflow with changing angles promotes the mixing of the gas and fuel, making the combustion more complete and efficient.

[0032] 3. In the present invention, the movement of the movable extrusion plate is used to control the slight rotation of the movable extension plate. At the same time, the rotation of the movable extension plate controls the reciprocating movement of the contact rod and the piston plate, thereby continuously squeezing and transferring the gas into the gas storage tank. The gas in the gas storage tank is maintained at a certain pressure by the first pressure relief valve and the second pressure relief valve, so that the airflow ejected through the first air outlet nozzle and the second air outlet nozzle is maintained at a certain pressure, which is more energy-saving and efficient, and the high-speed airflow has a better blowing treatment effect on gas and fuel.

[0033] 4. In the present invention, a piston cylinder, a piston plate, a contact rod, a third elastic component, and a second air outlet nozzle are used. Since the gas in the piston cylinder is continuously squeezed into the air storage box, the gas in the air storage box continuously increases, and the gas in the air storage box is ejected through the second exhaust pipe, the second pressure relief valve, and the second air outlet nozzle, exerting a recoil force on the upward flowing gas and fuel. The recoil effect effectively reduces the impact wear rate of fuel particles on the upper side wall of the combustion box body. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the three-dimensional structure of a pressurized fluidized bed combustion system and method proposed by the present invention;

[0035] Figure 2 A schematic diagram of a three-dimensional cross-sectional structure of a pressurized fluidized bed combustion system and method proposed in the present invention;

[0036] Figure 3 This is a schematic diagram of the three-dimensional cross-sectional structure of a combustion box of a pressurized fluidized bed combustion system and method proposed in the present invention;

[0037] Figure 4 A schematic diagram of a three-dimensional cross-sectional structure of a combustion box of a pressurized fluidized bed combustion system and method proposed in the present invention;

[0038] Figure 5 A schematic side perspective structural diagram of a pressurized fluidized bed combustion system and method proposed in the present invention;

[0039] Figure 6 This is a schematic diagram of the three-dimensional structure of the air storage box of a pressurized fluidized bed combustion system and method proposed in the present invention;

[0040] Figure 7 This is a schematic diagram of the three-dimensional structure of the first exhaust pipe of a pressurized fluidized bed combustion system and method proposed in the present invention;

[0041] Figure 8 A pressurized fluidized bed combustion system and method proposed by the present invention Figure 7 A schematic diagram of the enlarged structure of part A;

[0042] Figure 9 A schematic side view of the three-dimensional structure of a movable extension plate of a pressurized fluidized bed combustion system and method proposed in the present invention;

[0043] Figure 10 A schematic diagram of the three-dimensional structure of a movable extrusion device of a pressurized fluidized bed combustion system and method proposed in the present invention;

[0044] Figure 11 This is a schematic diagram of the three-dimensional structure of an extrusion and inflation device of a pressurized fluidized bed combustion system and method proposed in the present invention;

[0045] Figure 12 This is a schematic diagram of the three-dimensional cross-sectional structure of an extrusion and inflation device of a pressurized fluidized bed combustion system and method proposed in the present invention;

[0046] Figure 13 This is a schematic diagram of the three-dimensional structure of the second exhaust pipe of a pressurized fluidized bed combustion system and method proposed by the present invention.

[0047] Legend:

[0048] 1. Combustion box; 2. Control door; 3. Loading bed; 4. First partition; 5. Second partition; 6. Return pipe; 7. Exhaust pipe; 8. Placement slot; 9. Movable spoiler and exhaust device; 91. Movable extension plate; 92. Pin; 93. Rubber connection pad; 94. First elastic component; 95. First exhaust nozzle; 10. Movable extrusion device; 101. Linear bearing; 102. Crossbar; 103. Extension ring; 104. Second elastic component; 11. Movable extrusion device; 111. Movable extrusion plate; 112. First side plate; 113. Connecting sleeve; 114. Guide 115. Reciprocating screw rod; 116. Second side plate; 117. Threaded cap; 118. Reciprocating screw rod; 119. Driving assembly; 12. Extrusion inflation device; 121. Piston cylinder; 122. Piston plate; 123. Contact rod; 124. Guide sleeve; 125. Third elastic assembly; 126. Fixed rod; 127. One-way air inlet valve; 128. One-way air outlet valve; 13. First exhaust pipe; 14. Air storage box; 15. Air inlet pipe; 16. First pressure relief valve; 17. Second exhaust pipe; 18. Second pressure relief valve; 19. Second air outlet nozzle; 20. Feed port. DETAILED DESCRIPTION

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 any creative efforts shall fall within the scope of protection of the present invention.

[0050] Please see the attached Figure 1 -Attached Figure 13 The present invention provides a technical solution: a pressurized fluidized bed combustion system, comprising a combustion box 1, a first partition plate 4 and a second partition plate 5 are provided in the combustion box 1, three placement grooves 8 are provided on the left side of the inner wall of the combustion box 1, and a movable turbulent gas outlet device 9 is provided in the placement groove 8. The side of the movable turbulent gas outlet device 9 is slidably connected to a movable extrusion device 10 that penetrates the side of the combustion box 1, and the side of the movable turbulent gas outlet device 9 is slidably provided with two extrusion and inflation devices 12 that penetrate the side of the combustion box 1, and the extrusion and inflation device 12 is fixedly connected to the side of the combustion box 1. It is connected to the side of the combustion box body 1, and the side of the combustion box body 1 is fixedly connected to the position of the movable extrusion device 10. The side of the movable spoiler outlet device 9 is connected to the first exhaust pipe 13, and the other end of the first exhaust pipe 13 is connected to the air storage box 14 fixedly connected to the side of the combustion box body 1. The air storage box 14 is connected to the second exhaust pipe 17, and the other end of the second exhaust pipe 17 is connected to the second air outlet nozzle 19 provided on the inner wall of the combustion box body 1. The side of the extrusion and inflation device 12 is connected to the air inlet pipe 15 provided on the side of the air storage box 14.

[0051] The first baffle 4 and the second baffle 5 increase the flow path of the fuel and air flow in the combustion box 1, so that the fuel can be burned more fully and completely in the combustion box 1;

[0052] When the air pressure in the air storage tank 14 exceeds the second pressure relief valve 18, the gas in the air storage tank 14 is ejected through the second exhaust pipe 17, the second pressure relief valve 18 and the second air outlet nozzle 19, exerting a recoil force on the upward-flowing gas and fuel. The recoil effect effectively reduces the impact wear rate of the fuel particles on the upper side wall of the combustion box body 1.

[0053] Specifically, such as Figure 1-2 and Figure 5 As shown, a control door 2 is provided on the front of the combustion box body 1, a loading bed plate 3 is provided inside the combustion box body 1, a feed port 20 is provided on the left side of the combustion box body 1 at the upper side of the loading bed plate 3, and an air outlet pipe 7 is provided on the right side of the combustion box body 1.

[0054] The feed port 20 is used to inject fuel into the combustion box 1, and the loading bed 3 is used to support and place the fuel and facilitate the contact between the airflow blowing upward from the bottom and the fuel;

[0055] Specifically, such as Figure 2-4 and Figure 13 As shown, a return pipe 6 is provided under the combustion box body 1, and the position of the return pipe 6 corresponds to the position of the second partition 5. The first partition 4 and the second partition 5 divide the space inside the combustion box body 1 into a serpentine shape. A second pressure relief valve 18 is provided outside the second exhaust pipe 17, and a first pressure relief valve 16 is provided outside the first exhaust pipe 13.

[0056] The first pressure relief valve 16 is used to control the air flow in the air storage tank 14 to be discharged after reaching a certain pressure;

[0057] Specifically, such as Figure 9-10 As shown, the movable spoiler air outlet device 9 includes a movable extension plate 91 located in the placement groove 8, and a pin shaft 92 hinged in the placement groove 8 is provided through the side of the movable extension plate 91. The left side of the movable extension plate 91 is fixedly connected with a rubber connecting pad 93, and the rubber connecting pad 93 is connected in the placement groove 8. The left side of the movable extension plate 91 is fixedly connected with a first elastic component 94, and the first elastic component 94 is connected in the placement groove 8. The right side of the movable extension plate 91 is provided with a first air outlet nozzle 95. The movable extension plate 91 is set to be hollow, and the first exhaust pipe 13 is connected to the first air outlet nozzle 95 through the movable extension plate 91. The movable extension plate 91 is provided on the side of the movable extrusion device 10 and the extrusion inflation device 12.

[0058] The movable extension plate 91 is restricted and guided by the pin 92, so that the movable extension plate 91 can rotate. The movable extension plate 91 rotates slightly, which improves the flexibility of airflow guidance and prevents the airflow from rising straight up and hitting the upper side of the inner wall of the combustion box 1. The first elastic component 94 prevents the movable extension plate 91 from shaking randomly. The rubber connecting pad 93 provides a certain shield between the movable extension plate 91 and the placement groove 8. The first air outlet nozzle 95 sprays at multiple angles to provide secondary replenishment for the gas and fuel in the combustion box 1. The airflow with changing angles promotes the mixing of gas and fuel, making combustion more complete and efficient.

[0059] Specifically, such as Figure 6-7 and Figure 10 As shown, the movable extrusion device 10 includes a linear bearing 101 that passes through the side of the combustion box body 1, and a cross bar 102 is slidably connected inside the linear bearing 101. The cross bar 102 is slidably connected to the side of the movable extension plate 91. The part of the side of the cross bar 102 located outside the combustion box body 1 is provided with an extension ring 103, and the outer sleeve of the cross bar 102 is provided with a second elastic component 104. The two ends of the second elastic component 104 are fixedly connected to the linear bearing 101 and the extension ring 103 respectively.

[0060] The linear bearing 101 enables the crossbar 102 to move stably in a straight line. The crossbar 102 is used to squeeze and expand the movable extension plate 91. The elastic force applied by the second elastic component 104 to the crossbar 102 prevents the crossbar 102 from shaking randomly and controls the resetting process of the crossbar 102.

[0061] Specifically, such as Figure 6-8 As shown, the mobile extrusion device 11 includes a mobile extrusion plate 111, and the front and rear sides of the mobile extrusion plate 111 are respectively fixedly connected with a first side plate 112 and a second side plate 116, a connecting sleeve 113 is connected through the first side plate 112, and a guide rod 114 is slidably connected in the connecting sleeve 113, and both ends of the guide rod 114 are fixedly connected with a fixing plate 115, and the fixing plate 115 is fixedly connected to the side of the combustion box body 1, and a threaded cap 117 is connected through the second side plate 116.

[0062] A reciprocating screw rod 118 is provided in the threaded cap 117, and the top end of the reciprocating screw rod 118 is provided with an axle seat connected to the side of the combustion box body 1, and the bottom end of the reciprocating screw rod 118 is fixedly connected to a drive assembly 119, and the drive assembly 119 is fixedly connected to the side of the combustion box body 1. A protrusion is provided on the side of the movable extrusion plate 111 close to the combustion box body 1.

[0063] The connecting sleeve 113 and the guide rod 114 guide the vertical movement of the movable extrusion plate 111 to prevent the movable extrusion plate 111 from shaking and rotating. The driving assembly 119 controls the threaded cap 117, the second side plate 116 and the movable extrusion plate 111 to move upward through the reciprocating screw 118. During the upward movement of the movable extrusion plate 111, the raised portion on its side squeezes the cross bar 102.

[0064] Specifically, such as Figure 2 、 Figure 6 and Figure 9-10 As shown, the extrusion inflation device 12 includes a piston cylinder 121, and two fixing rods 126 are fixedly connected to the side of the piston cylinder 121. The fixing rod 126 is fixedly connected to the side of the combustion box body 1. A piston plate 122 is slidably connected in the piston cylinder 121, and a contact rod 123 is fixedly connected to the side of the piston plate 122. The contact rod 123 is slidably connected to the side of the movable extension plate 91. The contact rod 123 passes through and is slidably connected to the side of the piston cylinder 121. A guide sleeve 124 is provided on the outer sleeve of the contact rod 123, and the guide sleeve 124 passes through and is connected to the side of the combustion box body 1.

[0065] The contact rod 123 is outer-circuited with a third elastic component 125, and the two ends of the third elastic component 125 are respectively fixedly connected to the piston plate 122 and the inner wall of the piston cylinder 121. The left side of the piston cylinder 121 is connected to a one-way air outlet valve 128 and a one-way air inlet valve 127, and the one-way air outlet valve 128 is connected to the air inlet pipe 15.

[0066] The one-way air inlet valve 127 cooperates with the one-way air outlet valve 128 to continuously suck in and squeeze the external air into the air storage box 14 during the reciprocating movement of the piston plate 122, thereby achieving continuous gas supply to the air storage box 14. The elastic force applied by the third elastic component 125 to the piston plate 122 will control the piston plate 122 from moving arbitrarily, and cooperate with the movable extension plate 91 to control the piston plate 122 and the contact rod 123 to move reciprocatingly in the horizontal direction.

[0067] A method for using a pressurized fluidized bed combustion system, comprising the following steps:

[0068] Fuel is placed on the loading bed 3 of the combustion box 1. Subsequently, ignition is carried out below the loading bed 3 and air is blown upward. The airflow causes the fuel particles to float upward in the combustion box 1. The drive assembly 119 is activated, and the reciprocating screw 118 controls the threaded cap 117, the second side plate 116, and the movable extrusion plate 111 to move upward. During the upward movement of the movable extrusion plate 111, the raised portion of the side surface squeezes the cross bar 102, causing the cross bar 102 to move rightward. The rightward movement of the cross bar 102 causes the movable extension plate 91 to rotate rightward. This rotation stretches the rubber connection pad 93.

[0069] The rotation of the movable extension plate 91 blocks and guides the gas and fuel flowing upward on the leftmost side of the combustion box 1, causing the airflow direction to shift to the right. The multiple movable extension plates 91 rotate slightly, which improves the flexibility of the airflow guidance and prevents the airflow from rising straight up and hitting the upper side of the inner wall of the combustion box 1. During the rightward rotation of the movable extension plate 91, the degree of squeezing of the contact rod 123 is reduced, and the third elastic component 125 controls the piston plate 122 to reset to the right. The piston plate 122 sucks the external air into the piston cylinder 121 through the one-way air inlet valve 127. The contact rod 123 is squeezed and moved by the reset movable extension plate 91, and the gas in the piston cylinder 121 is squeezed by the piston plate 122. The gas then enters the air storage box 14 through the one-way air outlet valve 128.

[0070] The gas in the gas storage tank 14 is sprayed along multiple angles through the first exhaust pipe 13, the first pressure relief valve 16 and the first gas outlet nozzle 95, providing secondary replenishment for the gas and fuel in the combustion box body 1. The airflow with changed angles promotes the mixing of gas and fuel, making the combustion more complete and efficient. The gas in the gas storage tank 14 is sprayed out through the second exhaust pipe 17, the second pressure relief valve 18 and the second gas outlet nozzle 19, exerting a recoil force on the upward-flowing gas and fuel. The recoil effect effectively reduces the impact wear rate of fuel particles on the upper side wall of the combustion box body 1, and the combustion process is optimized to ensure the complete combustion of the fuel while reducing the wear of the combustion box body 1.

[0071] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A pressurized fluidized bed combustion system, comprising a combustion box (1), characterized in that: The combustion box (1) is provided with a first partition (4) and a second partition (5), and three placement grooves (8) are opened on the left side of the inner wall of the combustion box (1). A movable spoiler outlet device (9) is provided in the placement groove (8). The side of the movable spoiler outlet device (9) is slidably connected to a movable extrusion device (10) penetrating the side of the combustion box (1). The side of the movable spoiler outlet device (9) is slidably provided with two extrusion and inflation devices (12) penetrating the side of the combustion box (1). The extrusion and inflation devices (12) are fixedly connected to the side of the combustion box (1). The combustion box (1 ) is fixedly connected to a movable extrusion device (11) at a position corresponding to the movable extrusion device (10) on the side thereof, the side of the movable spoiler outlet device (9) is connected to a first exhaust pipe (13), the other end of the first exhaust pipe (13) is connected to an air storage box (14) fixedly connected to the side of the combustion box (1), the air storage box (14) is connected to a second exhaust pipe (17), the other end of the second exhaust pipe (17) is connected to a second air outlet nozzle (19) provided on the inner wall of the combustion box (1), and the side of the extrusion and inflation device (12) is connected to an air inlet pipe (15) provided on the side of the air storage box (14); The movable spoiler air outlet device (9) includes a movable extension plate (91) located in the placement groove (8), a pin shaft (92) hinged in the placement groove (8) is provided through the side of the movable extension plate (91), a rubber connection pad (93) is fixedly connected to the left side of the movable extension plate (91), and the rubber connection pad (93) is connected in the placement groove (8), and a first elastic component (94) is fixedly connected to the left side of the movable extension plate (91), and the first elastic component (94) is connected in the placement groove (8), and a first air outlet nozzle (95) is provided on the right side of the movable extension plate (91), and the movable extension plate (91) is set to be hollow, and the first exhaust pipe (13) is connected to the first air outlet nozzle (95) through the movable extension plate (91), and the movable extension plate (91) is provided on the side of the movable extrusion device (10) and the extrusion inflation device (12); The movable extrusion device (10) includes a linear bearing (101) extending through a side surface of the combustion box (1), a cross bar (102) being slidably connected in the linear bearing (101), the cross bar (102) being slidably connected to a side surface of a movable extension plate (91), an extension ring (103) being provided on a portion of the side surface of the cross bar (102) located outside the combustion box (1), a second elastic component (104) being provided on an outer sleeve of the cross bar (102), and two ends of the second elastic component (104) being fixedly connected to the linear bearing (101) and the extension ring (103) respectively; The extrusion inflation device (12) includes a piston cylinder (121), two fixing rods (126) are fixedly connected to the side of the piston cylinder (121), and the fixing rods (126) are fixedly connected to the side of the combustion box (1). A piston plate (122) is slidably connected in the piston cylinder (121), and a contact rod (123) is fixedly connected to the side of the piston plate (122), and the contact rod (123) is slidably connected to the side of the movable extension plate (91). The contact rod (123) passes through and is slidably connected to the side of the piston cylinder (121), and a guide sleeve (124) is provided on the outer shell of the contact rod (123), and the guide sleeve (124) passes through and is connected to the side of the combustion box (1).

2. A pressurized fluidized bed combustion system according to claim 1, characterized in that: A control door (2) is provided on the front of the combustion box (1), a loading bed (3) is provided inside the combustion box (1), a feed port (20) is provided on the left side of the combustion box (1) at a position above the loading bed (3), and an air outlet pipe (7) is provided on the right side of the combustion box (1).

3. The pressurized fluidized bed combustion system according to claim 2, characterized in that: A return pipe (6) is provided under the combustion box (1), and the position of the return pipe (6) corresponds to the position of the second partition (5). The first partition (4) and the second partition (5) divide the space in the combustion box (1) into a serpentine shape. A second pressure relief valve (18) is provided outside the second exhaust pipe (17), and a first pressure relief valve (16) is provided outside the first exhaust pipe (13).

4. The pressurized fluidized bed combustion system according to claim 3, characterized in that: The movable extrusion device (11) comprises a movable extrusion plate (111), wherein the front and rear sides of the movable extrusion plate (111) are respectively fixedly connected to a first side plate (112) and a second side plate (116), a connecting sleeve (113) is connected through the first side plate (112), a guide rod (114) is slidably connected in the connecting sleeve (113), both ends of the guide rod (114) are fixedly connected to a fixing plate (115), the fixing plate (115) is fixedly connected to the side of the combustion box (1), and a threaded cap (117) is connected through the second side plate (116).

5. The pressurized fluidized bed combustion system according to claim 4, characterized in that: A reciprocating screw rod (118) is provided in the threaded cap (117), a shaft seat connected to the side of the combustion box (1) is provided at the top end of the reciprocating screw rod (118), a driving assembly (119) is fixedly connected to the side of the combustion box (1), and a protrusion is provided on the side of the movable extrusion plate (111) close to the combustion box (1).

6. The pressurized fluidized bed combustion system according to claim 5, characterized in that: The contact rod (123) is provided with a third elastic component (125) on its outer sleeve. The two ends of the third elastic component (125) are fixedly connected to the piston plate (122) and the inner wall of the piston cylinder (121), respectively. The left side of the piston cylinder (121) is connected to a one-way air outlet valve (128) and a one-way air inlet valve (127). The one-way air outlet valve (128) is connected to the air inlet pipe (15).

7. A method for using a pressurized fluidized bed combustion system, using the pressurized fluidized bed combustion system according to claim 6, characterized in that: The method of use comprises the following steps: Fuel is placed on the loading bed plate (3) of the combustion box (1). Subsequently, ignition is carried out below the loading bed plate (3) and air is blown upward. The air flow causes the fuel particles to float upward in the combustion box (1). The driving assembly (119) is started, and the threaded cap (117), the second side plate (116) and the movable extrusion plate (111) are controlled to move upward by the reciprocating screw (118). During the upward movement of the movable extrusion plate (111), the side protrusions thereof squeeze the crossbar (102), causing the crossbar (102) to move rightward. The rightward movement of the crossbar (102) causes the movable extension plate (91) to rotate rightward. This rotation stretches the rubber connection pad (93). The rotation of the movable extension plate (91) blocks and guides the gas and fuel flowing upward on the leftmost side of the combustion box (1), causing the airflow direction to shift to the right. The multiple movable extension plates (91) rotate slightly, thereby improving the flexibility of airflow guidance and preventing the airflow from rising straight up and hitting the upper side of the inner wall of the combustion box (1). During the rightward rotation of the movable extension plate (91), the degree of squeezing of the contact rod (123) is reduced. The third elastic component (125) controls the piston plate (122) to reset to the right. The piston plate (122) sucks the external gas into the piston cylinder (121) through the one-way air inlet valve (127). The contact rod (123) is squeezed and moved by the reset movable extension plate (91), squeezing the gas in the piston cylinder (121) through the piston plate (122). The gas then enters the air storage box (14) through the one-way air outlet valve (128); The gas in the gas storage box (14) is ejected at multiple angles through the first exhaust pipe (13), the first pressure relief valve (16) and the first air outlet nozzle (95), providing secondary replenishment for the gas and fuel in the combustion box (1). The airflow with a changed angle promotes the mixing of the gas and fuel, making the combustion more complete and efficient. The gas in the gas storage box (14) is ejected through the second exhaust pipe (17), the second pressure relief valve (18) and the second air outlet nozzle (19), exerting a recoil force on the gas and fuel flowing upward. The recoil effect effectively reduces the impact wear rate of the fuel particles on the upper side wall of the combustion box (1), and the combustion process is optimized, ensuring the complete combustion of the fuel while reducing the wear of the combustion box (1).

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