Supercharged fluidized bed combustion system and method

Abstract

The invention discloses a supercharged fluidized bed combustion system and method, and belongs to the technical field of fluidized bed combustion equipment.The supercharged fluidized bed combustion system comprises a combustion box body, a first partition plate and a second partition plate are arranged in the combustion box body, three containing grooves are formed in the left side face of the inner wall of the combustion box body, and movable turbulent flow gas discharging devices are arranged in the containing grooves; according to the device, movable extension plates, a cross rod, a contact rod, a piston air cylinder, a first air outlet spray head, a movable extrusion plate, a driving assembly and a reciprocating screw rod are adopted, the multiple movable extension plates slightly rotate, the airflow guiding flexibility is improved, and it is avoided that airflow linearly ascends to impact the upper side face of the inner wall of the combustion box; gas in the gas storage tank is injected at multiple angles through the first exhaust pipe, the first pressure release valve and the first gas outlet spray head, secondary supplement is provided for the gas and fuel in the combustion tank body, mixing of the gas and the fuel is promoted through gas flow with the variable angles, and combustion is more sufficient 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] The pressurized fluidized bed is a fluidized bed reactor operated under pressurized conditions. It is widely used in the fields of chemical industry, energy and environmental protection; 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 baffle walls and lose kinetic energy and fall into the purification chamber, and melt under high temperature conditions to become a Newtonian fluid-like molten ash covering the surface of the purification chamber. Smaller particles violently collide under the action of gravity and baffle walls and 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 of wear of the heating surface metal due to the scouring of high-speed flue gas carrying particles in the field of industrial boiler technology.

[0003] Disadvantages of the existing technology: In the current pressurized fluidized bed combustion system, the fuel particles are carried by the 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 locations. 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.

[0004] Based on this, the present invention designs a pressurized fluidized bed combustion system and method to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to propose a pressurized fluidized bed combustion system and method in order to solve the problem that the overall improvement of combustion efficiency is affected and some fuel particles may not be completely burned, thereby reducing the energy conversion efficiency of the entire system.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: The flammable gas discharge nozzle is connected with a through hole in the combustion chamber, and the through hole is connected with a through hole in the combustion chamber to form a combustion chamber, and the combustion chamber has two openings, one end of which is connected with a through hole in the combustion chamber, and the other end is connected with a through hole in the combustion chamber to form a combustion chamber.

[0007] As a further description of the above technical solution: 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.

[0008] As a further description of the above technical solution: 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.

[0009] As a further description of the above technical solution: The movable spoiler air outlet device includes a movable extension plate located in a placement groove, a pin shaft hinged in the placement groove is penetrated 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.

[0010] As a further description of the above technical solution: 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, an extension ring is provided on the side of the cross bar outside the combustion box body, and a second elastic component is provided on the outer sleeve of the cross bar, and both ends of the second elastic component are fixedly connected to the linear bearing and the extension ring respectively.

[0011] As a further description of the above technical solution: The mobile extrusion device includes a mobile extrusion plate, and the front and rear sides of the mobile extrusion plate are respectively fixedly connected with a first side plate and a second side plate, the first side plate is penetrated by a connecting sleeve, a guide rod is slidably connected in the connecting sleeve, both ends of the guide rod are fixedly connected with a fixing plate, the fixing plate is fixedly connected to the side of the combustion box body, and the second side plate is penetrated by a threaded cap.

[0012] As a further description of the above technical solution: A reciprocating screw is provided in the threaded nut, the top of which is provided with an axle seat connected to the side of the combustion box body, the bottom of which is fixedly connected with a driving assembly, the driving assembly is fixedly connected to the side of the combustion box body, and a protrusion is provided on the side of the movable extrusion plate close to the combustion box body.

[0013] As a further description of the above technical solution: The extrusion inflation device includes a piston cylinder, two fixing rods are fixedly connected to the side of the piston cylinder, the fixing rods are fixedly connected to the side of the combustion box body, a piston plate is slidably connected inside 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.

[0014] As a further description of the above technical solution: The contact rod outer sleeve is provided with a third elastic component, and the two ends of the third elastic component are respectively fixedly connected to the piston plate and the inner wall of the piston cylinder. 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.

[0015] A method for using a pressurized fluidized bed combustion system, the method comprising the following steps: Fuel is placed on the loading bed plate of the combustion box body, and then ignition is carried out under the loading bed plate and air is blown upward. The airflow causes the fuel particles to float upward in the combustion box body, and the driving assembly is started. The threaded cap, the second side plate and the movable extrusion plate are controlled to move upward by the reciprocating screw. During the upward process of the movable extrusion plate, the convex part of the side of the movable extrusion plate squeezes the cross bar, causing the cross bar to move to the right. The rightward movement of the cross bar causes the movable extension plate to rotate to the right, and this rotation stretches the rubber connection pad; 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, and 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, and the gas in the piston cylinder is squeezed by the piston plate. The gas then enters the air storage box through the one-way air outlet valve. 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 supplement for the gas and fuel in the combustion box. The airflow with changed angles promotes the mixing of the 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 and wear speed of fuel particles on the upper side wall of the combustion box, and the combustion process is optimized to ensure the complete combustion of the fuel and reduce the wear of the combustion box.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. 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 driving assembly and a reciprocating screw are used. The driving 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 side protrusion 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. Multiple movable extension plates rotate 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.

[0017] 2. In the present invention, a piston cylinder is used, and the gas in the air storage box is ejected at multiple angles through the first exhaust pipe, the first pressure relief valve and the first air outlet nozzle. The high-pressure gas is ejected at multiple angles into between the gas and the fuel, and 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 the fuel, making the combustion more complete and efficient.

[0018] 3. In the present invention, the movement of the movable extrusion plate is used to control the small 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, so as to continuously squeeze and transfer the gas into the air storage box. The gas in the air storage box is kept 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 kept 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.

[0019] 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 upwardly 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

[0020] Figure 1 A schematic diagram of the three-dimensional structure of a pressurized fluidized bed combustion system and method proposed by the present invention; Figure 2 A schematic diagram of a three-dimensional cross-sectional structure of a pressurized fluidized bed combustion system and method proposed by the present invention; Figure 3 A schematic diagram of a three-dimensional cross-sectional structure of a combustion box of a pressurized fluidized bed combustion system and method proposed by the present invention; Figure 4 A schematic diagram of a three-dimensional cross-sectional structure of a combustion box body of a pressurized fluidized bed combustion system and method proposed by the present invention; Figure 5 A schematic side view of a three-dimensional structure of a pressurized fluidized bed combustion system and method proposed by the present invention; Figure 6 A schematic diagram of the three-dimensional structure of an air storage box of a pressurized fluidized bed combustion system and method proposed by the present invention; Figure 7 A schematic diagram of the three-dimensional structure of a first exhaust pipe of a pressurized fluidized bed combustion system and method proposed by the present invention; Figure 8A pressurized fluidized bed combustion system and method proposed by the present invention Figure 7 The enlarged structural diagram of part A in the middle; Fig. 9 A schematic diagram of a three-dimensional structure of a movable extension plate of a pressurized fluidized bed combustion system and method proposed by the present invention; Fig.10 A schematic diagram of the three-dimensional structure of a movable extrusion device of a pressurized fluidized bed combustion system and method proposed by the present invention; Fig.11 A schematic diagram of the three-dimensional structure of an extrusion and inflation device of a pressurized fluidized bed combustion system and method proposed by the present invention; Fig.12 A schematic diagram of a three-dimensional cross-sectional structure of an extrusion and inflation device of a pressurized fluidized bed combustion system and method proposed by the present invention; Fig.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.

[0021] Legend: 1. Combustion box; 2. Control door; 3. Loading bed; 4. First partition; 5. Second partition; 6. Feed return pipe; 7. Exhaust pipe; 8. Placement slot; 9. Active spoiler outlet device; 91. Active extension plate; 92. Pin; 93. Rubber connection pad; 94. First elastic component; 95. First outlet nozzle; 10. Active extrusion device; 101. Linear bearing; 102. Cross bar; 103. Extension ring; 104. Second elastic component; 11. Mobile extrusion device; 111. Mobile extrusion plate; 112. First side plate; 113. Connecting sleeve; 114. Guide rod; 115, fixed plate; 116, second side plate; 117, threaded cap; 118, reciprocating screw rod; 119, drive 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

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 creative work are within the scope of protection of the present invention.

[0023] Please see attached Figure 1 -Attached Fig.13 The present invention provides a technical solution: a pressurized fluidized bed combustion system, comprising a combustion box 1, a first baffle 4 and a second baffle 5 are arranged in the combustion box 1, three placement grooves 8 are opened on the left side of the inner wall of the combustion box 1, and a movable spoiler outlet device 9 is arranged in the placement groove 8. The side of the movable spoiler 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 spoiler 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 devices 12 are 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 with a mobile extrusion device 11 at the position corresponding to the movable extrusion device 10. The side of the movable spoiler air outlet device 9 is connected with a first exhaust pipe 13, and the other end of the first exhaust pipe 13 is connected with an air storage box 14 fixedly connected to the side of the combustion box body 1. The air storage box 14 is connected with a second exhaust pipe 17, and the other end of the second exhaust pipe 17 is connected with a second air outlet nozzle 19 arranged on the inner wall of the combustion box body 1, and the side of the extrusion and inflation device 12 is connected with an air intake pipe 15 arranged on the side of the air storage box 14.

[0024] The first baffle 4 and the second baffle 5 increase the flow path of the fuel and the airflow in the combustion box 1, so that the fuel can be burned more fully and thoroughly in the combustion box 1; When the air pressure in the air storage box 14 exceeds the second pressure relief valve 18, the gas in the air 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 upward flowing gas and fuel. The recoil effect effectively reduces the impact and wear speed of the fuel particles on the upper side wall of the combustion box body 1.

[0025] Specifically, 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.

[0026] The feed port 20 is used to inject fuel into the combustion box 1, and the loading bed plate 3 is used to support and place the fuel and facilitate the contact between the airflow blowing upward from the bottom and the fuel; Specifically, Figure 2-4 and Fig.13 As shown, 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 inside 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.

[0027] The first pressure relief valve 16 is used to control the air flow in the air storage box 14 to be discharged after reaching a certain pressure; Specifically, 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 penetrated through the side of the movable extension plate 91, and a rubber connecting pad 93 is fixedly connected to the left side of the movable extension plate 91, 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 to the first elastic component 94, and the first elastic component 94 is connected in the placement groove 8. A first air outlet nozzle 95 is provided on the right side of the movable extension plate 91. 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 arranged on the side of the movable extrusion device 10 and the extrusion inflation device 12.

[0028] The movable extension plate 91 is limited and guided by the pin shaft 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 at will. The rubber connection pad 93 provides a certain shielding between the movable extension plate 91 and the placement groove 8. The first air outlet nozzle 95 sprays at multiple angles to provide secondary supplement for the gas and fuel in the combustion box 1. The airflow with a changed angle promotes the mixing of gas and fuel, making the combustion more complete and efficient. Specifically, Figure 6-7 and Fig.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 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 respectively fixedly connected to the linear bearing 101 and the extension ring 103.

[0029] The linear bearing 101 enables the crossbar 102 to move linearly stably. 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 can control the resetting process of the crossbar 102. Specifically, Figure 6-8As 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 penetrated and connected to 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 with a fixing plate 115, the fixing plate 115 is fixedly connected to the side of the combustion box body 1, and a threaded cap 117 is penetrated and connected to the second side plate 116.

[0030] A reciprocating screw rod 118 is provided in the threaded cap 117, and a shaft seat connected to the side of the combustion box body 1 is provided at the top end of the reciprocating screw rod 118, and a driving assembly 119 is fixedly connected to the side of the combustion box body 1 at the bottom end of the reciprocating screw rod 118, and the driving assembly 119 is fixedly connected to the side of the combustion box body 1, and a protrusion is provided on the side of the movable extrusion plate 111 close to the combustion box body 1.

[0031] The connecting sleeve 113 and the guide rod 114 guide the vertical movement of the mobile extrusion plate 111 to prevent the mobile extrusion plate 111 from shaking and rotating. The driving assembly 119 controls the threaded cap 117, the second side plate 116 and the mobile extrusion plate 111 to move upward through the reciprocating screw rod 118. When the mobile extrusion plate 111 is rising, its side protrusion squeezes the cross bar 102. Specifically, 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, and the fixing rod 126 is fixedly connected to the side of the combustion box body 1, and 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, and 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 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.

[0032] The contact rod 123 is outer-coated 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.

[0033] 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 realizing continuous gas flow into 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 reciprocate in the horizontal direction.

[0034] A method for using a pressurized fluidized bed combustion system, the method comprising the following steps: Fuel is placed on the loading bed plate 3 of the combustion box 1. Then, ignition is started under the loading bed plate 3 and air is blown upward. The airflow causes the fuel particles to float upward in the combustion box 1. The driving assembly 119 is started. The threaded cap 117, the second side plate 116 and the movable extrusion plate 111 are controlled to move upward by the reciprocating screw rod 118. During the upward movement of the movable extrusion plate 111, the convex part 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. 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, so that the airflow direction is offset to the right. The multiple movable extension plates 91 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 1. During the rotation of the movable extension plate 91 to the right, the degree of squeezing 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 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, 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. The gas in the air storage box 14 is sprayed at multiple angles through the first exhaust pipe 13, the first pressure relief valve 16 and the first air outlet nozzle 95, providing secondary supplement for the gas and fuel in the combustion box 1. The airflow with changed angles promotes the mixing of the gas and fuel, making the combustion more complete and efficient. The gas in the air storage box 14 is sprayed 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 and wear speed of the fuel particles on the upper side wall of the combustion box 1, and the combustion process is optimized to ensure the complete combustion of the fuel while reducing the wear of the combustion box 1.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope 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 the left side of the inner wall of the combustion box (1) is provided with three placement grooves (8), and the placement grooves (8) are provided with a movable spoiler and air outlet device (9), and the side of the movable spoiler and air outlet device (9) is slidably connected to a movable extrusion device (10) penetrating the side of the combustion box (1), and the side of the movable spoiler and air outlet device (9) is slidably provided with two extrusion and inflation devices (12) penetrating the side of the combustion box (1), and the extrusion and inflation devices (12) are fixedly connected to the side of the combustion box (1), and the combustion box (1) ) is fixedly connected to a movable extrusion device (11) at a position corresponding to the movable extrusion device (10), 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) arranged on the inner wall of the combustion box (1), and the side of the extrusion and inflation device (12) is connected to an air intake pipe (15) arranged on the side of the air storage box (14).

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 plate (3) is provided inside the combustion box (1), a feed inlet (20) is provided on the left side of the combustion box (1) at a position above the loading bed plate (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 1, 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 1, characterized in that: The movable spoiler air outlet device (9) comprises 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 surface of the movable extension plate (91); a rubber connection pad (93) is fixedly connected to the left side surface of the movable extension plate (91); the rubber connection pad (93) is connected in the placement groove (8); a first elastic component (94) is fixedly connected to the left side surface of the movable extension plate (91); the first elastic component (94) is connected in the placement groove (8); a first air outlet nozzle (95) is provided on the right side surface of the movable extension plate (91); the movable extension plate (91) is set to be hollow; 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 surfaces of the movable extrusion device (10) and the extrusion inflation device (12).

5. A pressurized fluidized bed combustion system according to claim 4, characterized in that: The movable extrusion device (10) comprises a linear bearing (101) penetrating through the side of the combustion box (1), a cross bar (102) being slidably connected inside the linear bearing (101), the cross bar (102) being slidably connected to the side of the movable extension plate (91), an extension ring (103) being provided on the side of the cross bar (102) located outside the combustion box (1), a second elastic component (104) being provided on the 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.

6. The pressurized fluidized bed combustion system according to claim 1, characterized in that: The mobile extrusion device (11) comprises a mobile extrusion plate (111), the front and rear sides of the mobile extrusion plate (111) are respectively fixedly connected to a first side plate (112) and a second side plate (116), the first side plate (112) is penetrated by a connecting sleeve (113), 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 a side surface of the combustion box (1), and the second side plate (116) is penetrated by a threaded cap (117).

7. A pressurized fluidized bed combustion system according to claim 6, characterized in that: A reciprocating screw rod (118) is arranged inside the threaded cap (117); a shaft seat connected to the side of the combustion box (1) is arranged 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) at the bottom end of the reciprocating screw rod (118); the driving assembly (119) is fixedly connected to the side of the combustion box (1); and a protrusion is arranged on the side of the movable extrusion plate (111) close to the combustion box (1).

8. The pressurized fluidized bed combustion system according to claim 4, characterized in that: The extrusion inflation device (12) comprises a piston cylinder (121), the side of the piston cylinder (121) is fixedly connected to two fixing rods (126), the fixing rods (126) are fixedly connected to the side of the combustion box (1), a piston plate (122) is slidably connected inside the piston cylinder (121), the side of the piston plate (122) is fixedly connected to a contact rod (123), the contact rod (123) is slidably connected to the side of the movable extension plate (91), the contact rod (123) penetrates and is slidably connected to the side of the piston cylinder (121), the contact rod (123) is outer-cased with a guide sleeve (124), and the guide sleeve (124) penetrates and is connected to the side of the combustion box (1).

9. The pressurized fluidized bed combustion system according to claim 8, characterized in that: The contact rod (123) is provided with a third elastic component (125) on its outer sleeve, 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), and 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).

10. A method for using a pressurized fluidized bed combustion system, according to any one of claims 1 to 9, 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), and then ignited and blown upwards under the loading bed plate (3), so that the airflow causes the fuel particles to float upwards in the combustion box (1), and the driving assembly (119) is started to control the threaded cap (117), the second side plate (116) and the movable extrusion plate (111) to move upwards through the reciprocating screw (118). During the upward movement of the movable extrusion plate (111), the raised portion on the side of the movable extrusion plate (111) 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, and 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 plurality of 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 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) draws 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), and the gas in the piston cylinder (121) is squeezed 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 gas outlet nozzle (95), providing secondary supplement for the gas and fuel in the combustion box (1). The airflow with changing angles promotes the mixing of the gas and the 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 gas outlet nozzle (19), exerting a recoil force on the gas and fuel flowing upward. The recoil effect effectively reduces the impact wear speed of the fuel particles on the upper side wall of the combustion box (1), thereby optimizing the combustion process, ensuring the complete combustion of the fuel, and reducing the wear of the combustion box (1).

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