Combustion control system of baled straw direct-fired boiler

Abstract

The utility model discloses a straw bale direct combustion boiler combustion control system which comprises a fire grate, a boiler falling on the fire grate, a stock bin at the front end of the fire grate, a stock bin negative pressure meter detection port at the upper position of the stock bin, a feeding device connected with a stock bin port, a combustion cavity at the lower end of the stock bin, namely a main combustion area, and a bale breaking device at the upper position in the combustion cavity. A hearth temperature sensor is arranged at the position, close to the connecting arch, of the boiler, and a controller, a fire grate speed reducer, a burnout fan, a fire grate air blower, a heat exchange cylinder, a dust remover, an induced draft fan and a chimney are further arranged. The frequency of the feeding device, the frequency of the bag breaking device, the frequency of the air blowing and inducing fan and the frequency of the fire grate speed reducer can be controlled in a linkage mode according to the temperature condition of the hearth, and dynamic combustion is achieved; micro-negative pressure in the stock bin is realized by detecting the pressure in the stock bin, so that smoke return and fire return of a stock bin opening are avoided; through daily and powerful modes of the bag breaking device, the problems of non-uniform material falling and bag breaking efficiency of straws with different qualities are solved, and the practicability is higher.

Description

Technical Field

[0001] This utility model relates to the field of agricultural equipment technology, specifically to a combustion control system for a direct-fired boiler for bundled straw. Background Technology

[0002] With the development of direct combustion technology for bale straw, the requirements for automated control are becoming increasingly stringent, and the linkage between bale straw direct combustion boilers and various auxiliary machines is becoming increasingly important. Currently, most existing control systems are based on coal-fired boiler control systems with added auxiliary functions. However, the combustion characteristics of coal and bale straw fuels are drastically different. Coal combustion is relatively stable, while bale straw combustion is highly complex and unstable due to the influence of moisture content and impurities. Therefore, there is an urgent need for a combustion control system specifically designed for the combustion characteristics of bale straw direct combustion boilers. Summary of the Invention

[0003] To overcome the shortcomings of the existing technology, the present invention aims to propose a combustion control system for a direct-fired boiler for bale straw, which achieves dynamic and stable combustion of bale straw through linkage control, and addresses how to maintain a slight negative pressure in the hopper and solve the problems of uneven material dropping and the efficiency of bale breaking of straw of different qualities.

[0004] To achieve the above objectives, this utility model proposes a combustion control system for a direct-fired boiler using bundled straw, the specific technical solution of which is as follows:

[0005] A combustion control system for a direct-fired boiler using bundled straw includes a grate and a boiler resting on the grate;

[0006] The silo has a full membrane wall structure and is placed at the front end of the grate. A negative pressure gauge detection port is provided at the upper part of the silo.

[0007] The feeding device is connected to the hopper opening on one side of the hopper. A dust cover is provided at the connection point. A high-temperature resistant stainless steel sealing door is provided inside the dust cover. A quick-lift sealing door is provided at the inlet of the dust cover.

[0008] The combustion chamber is the main combustion zone and is located at the lower end of the hopper. The combustion chamber has a fire outlet on the side wall near the boiler. The fire outlet is connected to the boiler through a connecting arch. A furnace temperature sensor is installed in the boiler near the connecting arch.

[0009] A pack-breaking device is located in the upper part of the combustion chamber, at a certain height from the grate surface;

[0010] A high-pressure pack-breaking blower, wherein the high-pressure pack-breaking blower is located below the pack-breaking device and connected to the air box;

[0011] A grate reducer, wherein the grate reducer is located on one side of the front end of the grate;

[0012] A burnout blower is located at the front end of the boiler, near the combustion chamber, and below the furnace temperature sensor.

[0013] A grate blower, wherein the grate blower is located below the heat exchange cylinder and is connected to the grate;

[0014] The combustion control system of the direct-fired boiler for bale straw also includes a heat exchanger, a dust collector, an induced draft fan, and a chimney. The inlet smoke box of the heat exchanger is connected to the boiler, the outlet smoke box of the heat exchanger is connected to the inlet of the dust collector, the outlet of the dust collector is connected to the inlet of the induced draft fan, and the outlet of the induced draft fan is connected to the chimney.

[0015] Preferably, during the feeding process, one of the quick-lift sealing doors and the high-temperature resistant stainless steel sealing door is always kept closed to control the air intake to the greatest extent possible and maintain the boiler's slight negative pressure operation.

[0016] The combustion control system of the bale straw direct-fired boiler is also equipped with a controller. The controller reads the negative pressure gauge in the hopper during feeding and adjusts the frequency of the blower and induced draft fan to maintain the boiler operating under slight negative pressure.

[0017] Preferably, the controller uses the feedback signal from the furnace temperature sensor to control the feeding frequency, the frequency of the pack breaking device, the frequency of the grate reducer, and the frequencies of the blower and induced draft fan, so as to achieve efficient and stable load output.

[0018] Preferably, the package breaking device consists of several sets of package breaking units, each set of package breaking units has a package breaking roller and a reducer, and the rotation direction of the package breaking roller is controlled by controlling the reducer. The control mode is divided into normal mode and high-power mode.

[0019] When the program is set to daily mode, all the bale-breaking rollers rotate to the left together, and after a certain interval, they rotate to the right together, so that the bale straw moves left and right on the bale-breaking rollers, breaking it as it moves, so that the broken straw fuel falls more evenly onto the grate.

[0020] When the program is set to the powerful mode, the two adjacent baling rollers rotate in opposite directions and then rotate in the opposite direction after a certain interval, which is used to increase the disturbance to the bundled straw and reduce the difficulty of breaking the bales.

[0021] Preferably, the packing breaking unit further includes a first sealing component, a second sealing component, and a heat collection and air distribution duct. The packing breaking roller is a hollow structure, and its outer surface is provided with a plurality of protruding hollow spikes communicating with it. The other end of the hollow spikes forms a second air outlet. The outer surface of the heat collection and air distribution duct is provided with a plurality of protruding hollow short pipes communicating with it. The other end of the hollow short pipes forms a first air outlet. One end of the packing breaking roller is connected to the reducer through the first sealing component, and the other end is connected to the heat collection and air distribution duct through the second sealing component in the maintenance space outside the combustion chamber.

[0022] Preferably, the air box is located outside the side wall of the silo away from the boiler and below the reducer; one side of the air box is connected to the high-pressure pack-breaking blower, and the opposite side is connected to one end of the heat collection and air distribution pipe.

[0023] Preferably, the sidewall of the combustion chamber is a concrete-wrapped membrane wall structure, where concrete has heat storage properties to create a high-temperature environment.

[0024] Preferably, the combustion control system of the bale straw direct-fired boiler further includes a feeding device winch, a pusher cart, and an observation hole. The feeding device winch is located below the feeding device and the pusher cart is driven by a wire rope.

[0025] Compared to existing technologies, this utility model provides a combustion control system for a bale-fired straw direct-fired boiler. This system tightly integrates the feeding device, bale-breaking device, high-pressure bale-breaking blower, grate blower, grate reducer, and induced draft fan of the bale-fired straw direct-fired boiler. The frequency of the feeding, bale-breaking device, blower, and grate reducer is controlled according to the boiler furnace temperature to achieve dynamic combustion. The bale-breaking device has a normal mode and a high-power mode to solve the problems of uneven material feeding and the impact of different straw quality on bale-breaking efficiency. The high-pressure bale-breaking blower, chain grate blower, and induced draft fan are controlled by detecting the pressure inside the hopper to achieve a slight negative pressure inside the hopper, preventing backflow of smoke and fire. Furthermore, this bale-fired straw direct-fired boiler combustion control system is PLC-controlled, providing intuitive process and data display, and is simple and convenient to operate. Attached Figure Description

[0026] Figure 1 This is a side view of the combustion control system of this utility model;

[0027] Figure 2 This is a schematic diagram of the pack-breaking unit structure in the pack-breaking device of the combustion control system of the present invention.

[0028] Description of the numbers in the figure:

[0029] 1. Feeding device; 2. Hopper; 3. Combustion chamber; 4. Bagged breaking device; 41. Reducer; 42. Bagged breaking roller; 43. Second air outlet; 44. Heat collection and air distribution pipe; 45. First air outlet; 5. Grate; 6. Boiler; 7. Quick-lift sealing door; 8. Dust cover; 9. High-temperature resistant stainless steel sealing door; 10. Hopper opening; 11. Hopper negative pressure gauge; 12. Maintenance space; 13. High-pressure bagged breaking blower; 14. Air box; 15. Grate reducer; 16. Fire outlet; 17. Connecting arch; 18. Furnace temperature sensor; 19. Combustion blower; 20. Heat exchanger; 21. Grate blower; 22. Dust collector; 23. Exhaust fan; 24. Chimney; 25. Feeding device winch; 26. Pusher trolley; 27. Observation hole. Detailed Implementation

[0030] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings, provides a more detailed account of a direct-fired boiler combustion control system for bundled straw.

[0031] Figure 1 This invention illustrates the structure of one embodiment of a combustion control system for a direct-fired boiler using bundled straw, as shown in the figure. Figure 1As shown, a combustion control system for a direct-fired boiler using bale straw mainly includes a feeding device 1, a hopper 2, a bale-breaking device 4, a combustion chamber 3, a high-pressure bale-breaking blower 13, a grate 5, a grate reducer 15, a grate blower 20, a burnout blower 18, a boiler 6, a heat exchanger 19, a dust collector 21, an induced draft fan 22, and a chimney 23. The hopper 2 has a full membrane wall structure, with the combustion chamber 3 at its lower end. The combustion chamber 3 is the main combustion zone. The side walls of the combustion chamber 3 are made of concrete-wrapped membrane walls, and the concrete has heat storage properties to create a high-temperature environment. The hopper 2 rests on the grate 5 and is located at the front end of the grate 5. The side wall of the combustion chamber 3 at the lower end of the hopper 2, near the boiler 6, has a fire outlet 16. The fire outlet 16 is connected to the boiler 6 via a connecting arch 17, and the boiler 6 rests on the grate 5. The feeding device 1 is connected to the hopper opening 10 on one side of the hopper 2. A dust cover 8 is provided at the connection point. The dust cover 8 has a high-temperature resistant stainless steel sealing door 9 inside, and a quick-lift sealing door 7 is provided at the inlet of the dust cover 8. The pack breaking device 4 is located in the upper part of the combustion chamber 3, at a certain height from the grate 5. The high-pressure pack breaking blower 13 is located below the pack breaking device 4 and is connected to the air box 14. The negative pressure gauge 11 of the hopper has its detection port located in the upper part of the hopper 2. The furnace temperature sensor 18 is located at the front end of the boiler 6 near the connecting arch 17. The grate reducer 15 is located on one side of the front end of the grate 5 and below the high-pressure pack breaking blower 13. The burnout blower 19 is located at the front end of the boiler 6 near the combustion chamber 3 and below the furnace temperature sensor 18. The grate blower 21 is located below the heat exchange cylinder 20 and is connected to the grate 5. The inlet smoke box of heat exchanger 20 is connected to boiler 6, the outlet smoke box of heat exchanger 20 is connected to the inlet of dust collector 22, the outlet of dust collector 22 is connected to the inlet of induced draft fan 23, and the outlet of induced draft fan 23 is connected to chimney 24. Combustion chamber 3 is the main combustion zone, and its sidewall is a concrete-wrapped membrane wall structure. A fire outlet 16 is located on the sidewall near boiler 6, and the fire outlet 16 is connected to boiler 6 via a connecting arch 17. Concrete has heat storage capacity, providing favorable conditions for creating a high-temperature environment in combustion chamber 3.

[0032] like Figure 1 and Figure 2 As shown, the packing breaking device 4 consists of several packing breaking units, each including a reducer 41, a packing breaking roller 42, a first sealing assembly, a second sealing assembly, and a heat collection and air distribution duct 44. The packing breaking roller 42 has a hollow structure, with several protruding hollow spikes communicating with it on its outer surface. The other end of each hollow spike forms a second air outlet 43. The heat collection and air distribution duct 44 has several protruding hollow short pipes communicating with it on its outer surface, with the other end of each hollow short pipe forming a first air outlet 45. One end of the packing breaking roller 42 is connected to the reducer 41 via the first sealing assembly, and the other end of the packing breaking roller 42 is connected to the heat collection and air distribution duct 44 via the second sealing assembly in the maintenance space 12 outside the combustion chamber 3.

[0033] like Figure 1As shown, the air box 14 is located outside the side wall of the silo 2 away from the boiler 6, below the reducer 41. One side of the air box 14 is connected to the high-pressure pack breaking blower 13, and the opposite side is connected to one end of the heat collection and air distribution pipe 44.

[0034] The baleful straw fuel entering the hopper 2 falls onto the bale-breaking roller 42 of the bale-breaking device 4. High-pressure air is input into the air box 14 by the high-pressure bale-breaking blower 13 and distributed by the air box 14 to several heat-collecting air distribution pipes 44. The high-pressure air exchanges heat with the heat-collecting air distribution pipes 44 to form high-temperature and high-pressure air, which is then ejected sequentially from the first air outlet 45 and the second air outlet 43. At the same time, the reducer 41 drives the bale-breaking roller 42 to rotate, and the hollow spikes tear the baleful straw fuel. At this time, the second air outlet 43 ejects high-temperature and high-pressure air, creating a high-temperature environment in a localized area, making it easier for the baleful straw fuel to be broken up, dried, and burned. The broken and burning fuel falls naturally and is then ignited again by the high-temperature and high-pressure air ejected from the first air outlet 45 of the heat-collecting air distribution pipe 44, resulting in intense combustion. The bale of straw fuel, from being broken up, dried, burned, and falling through the second air outlet 43 and the first air outlet 45 with high-temperature and high-pressure air to falling onto the grate 5, all occurs within the combustion chamber 3. The concrete of the combustion chamber 3 stores heat, creating a high-temperature environment that helps the fuel burn more completely. The burning fuel enters the boiler 6 through the fire outlet 16 and the connecting arch 17, and moves towards the rear of the boiler 6 with the grate 5. The main combustion zone is located at the front of the grate 5, allowing the fuel ample time and space to burn completely.

[0035] The bale-breaking device 4 consists of several bale-breaking units, each equipped with a reducer 41. The rotation direction of the bale-breaking rollers 42 is controlled by controlling the reducer 41. The control modes are divided into normal mode and high-power mode. Since the baleed straw falls naturally onto the bale-breaking rollers after entering the hopper, it may deviate to the left or right, resulting in an uneven fuel layer after crushing. To solve this problem, the program is set to normal mode, where all bale-breaking rollers 42 rotate to the left together, then rotate to the right together after a certain interval, causing the baleed straw to move left and right on the bale-breaking rollers, crushing it as it moves. This allows the crushed straw fuel to fall more evenly onto the grate 5. Due to the different types and qualities of baleed straw, the difficulty of breaking them varies. To solve this problem, the program is set to high-power mode, where adjacent bale-breaking rollers 42 rotate in opposite directions, then rotate in opposite directions after a certain interval, increasing the disturbance to the baleed straw and reducing the difficulty of breaking them.

[0036] The combustion control system of this bale straw direct-fired boiler is also equipped with a controller. The fast-lift sealing door 7 and the high-temperature resistant stainless steel sealing door 9 always keep one door closed during the feeding process to control the air intake to the greatest extent to maintain the boiler's slight negative pressure operation. At the same time, the controller will detect the reading of the negative pressure gauge 11 located at the top of the hopper during feeding to adjust the frequency of the high-pressure bale-breaking blower 13, grate blower 21, burnout blower 19, and induced draft fan 23 to maintain the boiler's slight negative pressure operation.

[0037] The controller controls the feeding frequency, the frequency of the pack breaking device 4 reducer 41, the frequency of the grate reducer 15, and the frequencies of the high-pressure pack breaking blower 13, the grate blower 21, the burnout blower 19, and the induced draft fan 23 based on the feedback signal from the furnace temperature sensor 18, so as to achieve an efficient and stable load output.

[0038] The combustion control system of this bale straw direct-fired boiler also includes a feeding device winch 25, a pusher 26, and an observation hole 27. The feeding device winch 25 is located below the feeding device 1 and drives the pusher 26 by a steel rope. The observation hole 27 is located on the top of the hopper. The pusher 26 is placed on the feeding device 1 and is used to push the bale straw fuel.

[0039] The working principle of this invention is as follows: The pusher trolley 26 of the feeding device 1 waits at the starting position for the bale grabber to feed the straw. After the bale grabber has placed the bale of straw in the combustion position, the feeding switch is activated. The winch 25 of the feeding device drags the pusher trolley 26 forward via a wire rope, pushing the bale of straw fuel. At the same time, the rapid lifting sealing door 7 opens, and the pusher trolley 26 falls down after passing the bale of straw fuel. The pusher trolley 26 continues to push the bale of straw fuel until the bale of straw fuel pushes open the high-temperature resistant stainless steel sealing door 9, and the bale of straw falls into the hopper 2. The winch 25 of the feeding device reverses, dragging the pusher trolley 26 back. Similarly, the rapid lifting sealing door 7 opens and falls down after the pusher trolley 26 has completely passed through. The pusher trolley 26 is dragged back to the starting position and stops, thus completing the feeding process. The bales of straw fuel entering the hopper 2 fall onto the bale-breaking roller 42 of the bale-breaking device 4. The bale-breaking device 4 consists of several bale-breaking units, wherein the bale-breaking roller 42 is a hollow structure, one end of which is connected to the reducer 41 through a first sealing component, and the other end of which is connected to the heat collection and air distribution pipe 44 through a second sealing component. The bale-breaking roller 42 is provided with several protruding hollow spikes communicating with it, and the other end of the hollow spikes forms a second air outlet 43. One end of the heat collection and air distribution pipe 44 is connected to the bale-breaking roller 42 through the second sealing component, and the other end of the hollow spikes is connected to the air box 14. The heat collection and air distribution pipe 44 is provided with several protruding hollow short pipes communicating with it, and the other end of the hollow short pipes forms a first air outlet 45. High-pressure air enters the air box 14 from the outlet of the high-pressure bale-breaking blower 13 and is distributed to several sets of heat-collecting air distribution pipes 44. The high-pressure air exchanges heat with the heat-collecting air distribution pipes 44 to form high-temperature, high-pressure air, which is then ejected sequentially from the first air outlet 45 and the second air outlet 43. The reducer 41 drives the bale-breaking roller 42 to rotate, and the hollow spikes tear the bale of straw fuel. At the same time, high-temperature, high-pressure air is ejected from the second air outlet 43, creating a high-temperature environment in a localized area, making it easier for the bale of straw fuel to be broken up, dried, and burned. The broken and burned fuel falls naturally and is then ejected by high-temperature, high-pressure air from the first air outlet 45 of the heat-collecting air distribution pipe 44 to aid combustion again before falling onto the grate 5. From being broken up, dried, burned, to falling onto the grate 5, the entire process of the bale of straw fuel occurs within the combustion chamber 3. The concrete of the combustion chamber 3 stores heat to create a high-temperature environment, which helps the fuel burn more completely. The burning fuel enters the boiler 6 through the grate 5 from the outlet 16 and connecting arch 17. Simultaneously, the burnout blower 19 and grate blower 21 continuously supply combustion air to ensure complete combustion. The high-temperature flue gas generated by combustion exchanges heat with the water cooling system of the boiler 6, then enters the heat exchanger 20 for further heat exchange before entering the dust collector 22 for dust removal. The qualified flue gas is then discharged outdoors through the induced draft fan 23 and chimney 24, completing the heat exchange process. The controller, based on the boiler furnace temperature, controls the frequencies of the feeding device 1, the pack breaking device 4, the high-pressure pack breaking blower 13, the grate blower 21, the burnout blower 19, the induced draft fan 23, and the grate reducer 15 to achieve dynamic and stable combustion.

[0040] The controller of this bale straw direct-fired boiler combustion control system is installed on the electrical control cabinet. All sensors and motors are connected to the controller port via cables. The controller outputs signals according to the program based on feedback data and detection signals, thereby completing the entire control process. This bale straw direct-fired boiler combustion control system is controlled by a PLC, and the process and various data displays are intuitive and easy to operate.

[0041] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A combustion control system for a direct-fired boiler using bundled straw, characterized in that... , including grate (5) and boiler (6) resting on grate (5); The silo (2) is a full membrane wall structure and is placed at the front end of the grate (5). The upper part of the silo (2) is provided with a negative pressure gauge (11) detection port. The feeding device (1) is connected to the hopper opening (10) on one side of the hopper (2). A dust cover (8) is provided at the connection. A high-temperature resistant stainless steel sealing door (9) is provided inside the dust cover (8). A fast lifting sealing door (7) is provided at the inlet of the dust cover (8). Combustion chamber (3), the combustion chamber (3) is the main combustion zone and is located at the lower end of the hopper (2). The combustion chamber (3) has a fire outlet (16) on the side wall near the boiler. The fire outlet (16) is connected to the boiler (6) through a connecting arch (17). The boiler (6) is provided with a furnace temperature sensor (18) near the connecting arch (17). The pack breaking device (4) is located in the upper part of the combustion chamber (3), at a certain height from the grate (5). A high-pressure pack-breaking blower (13) is located below the pack-breaking device (4) and connected to the air box (14); A grate reducer (15) is provided on one side of the front end of the grate (5); The burnout blower (19) is located at the front end of the boiler (6) near the combustion chamber (3) and below the furnace temperature sensor (18); A grate blower (21) is located at the end of the grate (5) and connected to the grate (5); It also includes a heat exchanger (20), a dust collector (22), an induced draft fan (23), and a chimney (24). The inlet smoke box of the heat exchanger (20) is connected to the boiler (6), the outlet smoke box of the heat exchanger (20) is connected to the inlet of the dust collector (22), the outlet of the dust collector (22) is connected to the inlet of the induced draft fan (23), and the outlet of the induced draft fan (23) is connected to the chimney (24).

2. The combustion control system for a direct-fired boiler using bale-bagged straw according to claim 1, characterized in that, The fast lifting sealing door (7) and the high temperature resistant stainless steel sealing door (9) always keep one door closed during the feeding process to control the air intake and maintain the boiler's slight negative pressure operation. The combustion control system of the bundled straw direct-fired boiler is also equipped with a controller. The controller detects the reading of the negative pressure gauge (11) in the hopper when feeding materials, and adjusts the frequency of the blower and induced draft fan to maintain the boiler operating under slight negative pressure.

3. The combustion control system for a direct-fired boiler using bale-bagged straw according to claim 2, characterized in that, The controller uses the feedback signal from the furnace temperature sensor (18) to control the feeding frequency, the breaking device frequency, the grate reducer frequency, and the frequency of the blower and induced draft fan in a coordinated manner, so as to achieve efficient and stable load output.

4. The combustion control system for a direct-fired boiler using bale-bagged straw according to claim 1, characterized in that, The package breaking device (4) consists of several packages breaking units. Each package breaking unit has a package breaking roller (42) and a reducer (41). The rotation direction of the package breaking roller (42) is controlled by controlling the reducer (41). The control mode is divided into normal mode and strong mode. When the program is set to daily mode, all the breaking rollers (42) rotate to the left together, and after a certain interval, they rotate to the right together, so that the bundled straw moves left and right on the breaking rollers (42) and is broken while moving, so that the broken straw fuel falls more evenly onto the grate (5). When the program is set to the strong mode, the two adjacent baling rollers (42) rotate in opposite directions and then rotate in the opposite direction after a certain interval, which is used to increase the disturbance to the bundled straw and reduce the difficulty of breaking the baling.

5. The combustion control system for a direct-fired boiler using bundled straw according to claim 4, characterized in that, The packing breaking unit further includes a first sealing component, a second sealing component, and a heat collection and air distribution pipe (44). The packing breaking roller (42) is a hollow structure. The outer surface of the packing breaking roller (42) is provided with a plurality of protruding hollow spikes communicating with it. The other end of the hollow spikes forms a second air outlet (43). The outer surface of the heat collection and air distribution pipe (44) is provided with a plurality of protruding hollow short pipes communicating with it. The other end of the hollow short pipes forms a first air outlet (45). One end of the packing breaking roller (42) is connected to the reducer (41) through the first sealing component, and the other end is connected to the heat collection and air distribution pipe (44) through the maintenance space (12) outside the combustion chamber (3) through the second sealing component.

6. The combustion control system for a direct-fired boiler using bundled straw according to claim 5, characterized in that, The air box (14) is located outside the side wall of the silo (2) away from the boiler (6) and below the reducer (41); one side of the air box (14) is connected to the high-pressure blower (13), and the opposite side is connected to one end of the heat collection and air distribution pipe (44).

7. The combustion control system for a direct-fired boiler using bale-bagged straw according to claim 1, characterized in that, The sidewall of the combustion chamber (3) is a concrete-wrapped membrane wall structure. Concrete has heat storage properties and is used to create a high-temperature environment.

8. The combustion control system for a direct-fired boiler using bundled straw according to claim 1, characterized in that, It also includes a feeding device winch (25), a pusher cart (26) and an observation hole (27). The feeding device winch (25) is located below the feeding device (1) and the pusher cart (26) is driven by a wire rope.

Images