Biomass boiler capable of recycling flue gas waste heat

Abstract

The utility model relates to the technical field of boilers, and discloses a biomass boiler capable of recycling flue gas waste heat, which comprises a base, the top of the base is fixedly connected with a combustion chamber, the middle of the combustion chamber is fixedly connected with a water tank, the top of the combustion chamber is fixedly connected with a feeding box, and the bottom of the feeding box is fixedly connected with a blanking box. A first motor is fixedly connected to the outer side of the feeding box, a discharging plate is fixedly connected to the output end of the first motor, a chain conveying assembly is arranged in the combustion chamber, and an auger discharging assembly is arranged in the middle of the combustion chamber. According to the biomass combustion device, fuel can be fed into the combustion chamber in batches to be combusted through the first driving motor, then the combustion efficiency can be guaranteed, meanwhile, impurities in smoke can be filtered out, filtered gas is blown to biomass fuel, the combustion efficiency of the fuel can be improved, and meanwhile heat loss can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to a biomass boiler for recovering waste heat from flue gas. Background Art

[0002] Hot water boilers include electric hot water boilers, oil-fired hot water boilers, gas-fired hot water boilers and coal-fired hot water boilers. Hot water boilers are boilers that produce hot water. They are thermal energy equipment that uses the heat energy released by fuel combustion to heat water to a rated temperature. As the fourth largest energy source, efficient and clean use of biomass energy has strategic significance. Compared with fossil fuels, biomass has the advantages of lower pollution.

[0003] After searching, Chinese patent announcement number: CN213873184U discloses an energy-saving and environmentally friendly biomass hot water boiler, including a cleaning box, a bracket and a furnace body, a first motor is fixedly connected to the right side of the top of the bracket through a fixed block, a screw feeder is fixedly connected to the end of the main shaft of the first motor, a silo is fixedly connected to the top of the bracket, the screw feeder passes through the silo, a hopper is slidably connected to the left side of the silo, an infrared sensor is fixedly connected to the inside of the hopper, and a feed pipe is connected to the bottom of the hopper. In the utility model, the first motor, screw feeder, infrared sensor and hopper are set. This setting cooperates with the fixed connection of the first motor and the screw feeder and the fixed connection of the infrared sensor and the hopper, which can effectively carry out quantitative feeding, avoiding the problems of excessive heat caused by excessive feeding, resulting in waste, and too little feeding causing too low heat and failure to meet demand.

[0004] Although quantitative feeding can be performed in the above technology, it still has some shortcomings. The existing biomass fuel burns in the furnace to generate high-temperature smoke that rises from the furnace mouth to heat the water tank. However, since the burned biomass fuel still has a certain amount of heat, the burned biomass fuel is far away from the furnace mouth and the remaining heat cannot be used, resulting in heat loss. Therefore, a biomass boiler that recovers flue gas waste heat is proposed to solve the above problem. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a biomass boiler for recovering waste heat from flue gas, aiming to improve the problem in the prior art that the remaining heat in the biomass fuel after combustion cannot be utilized, resulting in heat loss.

[0006] In order to achieve the above-mentioned objectives, the utility model adopts the following technical scheme: a biomass boiler for recovering waste heat from flue gas, comprising a base, the top of the base is fixedly connected to a combustion chamber, the middle of the combustion chamber is fixedly connected to a water tank, the top of the combustion chamber is fixedly connected to a feed box, the bottom of the feed box is fixedly connected to a discharge box, the outer side of the feed box is fixedly connected to a motor 1, the output end of the motor 1 is fixedly connected to a discharge plate, a chain transport assembly is arranged inside the combustion chamber, an auger discharge assembly is arranged in the middle of the combustion chamber, a connecting assembly is arranged between the discharge plate and the chain transport assembly, an exhaust pipe is fixedly connected to the right side of the combustion chamber, the other end of the exhaust pipe is fixedly connected to a shell, the middle part of the shell is slidably connected to a filter box, the rear side of the filter box is fixedly connected to a connecting pipe, the other end of the connecting pipe is fixedly connected to a diverter box, the diverter box is fixedly connected to the middle part of the discharge box, and the middle part of the filter box is rotatably connected to a cleaning assembly.

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

[0008] The connecting assembly includes two pulleys, one of which is fixedly connected to an end of the unloading plate away from the motor, and the other is fixedly connected to the outside of the chain transport assembly. The outer peripheries of the two pulleys are sleeved with synchronous belts.

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

[0010] The cleaning assembly includes a rotating rod, the outer side of the rotating rod is fixedly connected to a shell, the inside of the shell is fixedly connected to a second compression spring, the other end of the second compression spring is fixedly connected to a scraper, the scraper is in contact with the filter box, and the bottom of the shell is fixedly connected to a driving assembly.

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

[0012] The driving assembly includes motor 2, which is fixedly connected to the bottom of the shell, and the output end of motor 2 is fixedly connected to a sleeve, the interior of the sleeve is fixedly connected to a compression spring 1, the other end of the compression spring 1 is fixedly connected to a T-bar, the outer side of the T-bar is fixedly connected to a limit block, the limit block and the rotating rod are plugged into each other, and the front side of the shell is rotatably connected to a sealing flap.

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

[0014] A sleeve is fixedly connected to the middle of the combustion chamber, and the two pulleys are both arranged inside the sleeve.

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

[0016] The bottom of the shell is fixedly connected with a cover body, and the second motor is specifically fixedly connected to the inside of the cover body.

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

[0018] A handle is fixedly connected to the right side of the filter box.

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

[0020] A limiting groove is provided at the bottom of the rotating rod, and the limiting block is specifically plugged and matched with the limiting groove.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the utility model, through the cooperation of the exhaust pipe, the shell, the filter box, the connecting pipe, the diverter box, the motor 1, the feed plate and the connecting assembly, the biomass fuel can be dropped to the top of the chain transport assembly and transported to the combustion chamber for combustion by driving the motor 1, thereby ensuring the combustion efficiency. At the same time, under the action of the filter box, the impurities in the smoke can be filtered and the filtered gas can be passed through the diverter box to enter the feed box, thereby drying the biomass fuel and preheating it in advance, thereby improving the efficiency of fuel combustion and preventing heat loss.

[0023] 2. In the utility model, through the cooperation of the driving assembly, sleeve, T-bar, compression spring 1, limit block, rotating rod and cleaning assembly, the scraper can sweep the impurities filtered on the top of the filter box by driving motor 2 and under the action of compression spring 2, which can increase the continuous use time of the filter box. At the same time, when the filter box is blocked, the filter box can be taken out by pulling down the T-bar and under the action of compression spring 1, and then the filter box can be cleaned. At the same time, the filter box can be installed by pulling down the T-bar and inserting the filter box into the housing, and the rotating rod and the T-bar can be connected to enable the scraper to clean the filter box. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A three-dimensional schematic diagram of a biomass boiler for recovering waste heat from flue gas proposed in the utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the connection components of a biomass boiler for recovering waste heat from flue gas proposed in the utility model;

[0026] Figure 3 This is a structural schematic diagram of a motor 1 of a biomass boiler for recovering waste heat from flue gas proposed in the utility model;

[0027] Figure 4 This is a structural schematic diagram of a filter box of a biomass boiler for recovering waste heat from flue gas proposed in the utility model;

[0028] Figure 5 This is a schematic structural diagram of a limit block of a biomass boiler for recovering waste heat from flue gas proposed in the utility model;

[0029] Figure 6 This is a structural schematic diagram of a scraper of a biomass boiler for recovering waste heat from flue gas proposed in the utility model.

[0030] Legend:

[0031] 1. Base; 2. Combustion chamber; 3. Water tank; 4. Feed box; 5. Discharge box; 6. Chain transport assembly; 7. Auger discharge assembly; 8. Exhaust pipe; 9. Shell; 10. Filter box; 11. Connecting pipe; 12. Diverter box; 13. Discharge plate; 14. Pulley; 15. Synchronous belt; 16. Motor 1; 17. Sleeve; 18. T-bar; 19. Compression spring 1; 20. Limit block; 21. Rotating rod; 22. Shell; 23. Compression spring 2; 24. Scraper; 25. Motor 2; 26. Limit groove; 27. Sleeve; 28. Sealing flap. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] Reference Figure 1-Figure 3 The utility model provides an embodiment of a biomass boiler for recovering waste heat from flue gas, comprising a base 1, a combustion chamber 2 is fixedly connected to the top of the base 1, a water tank 3 is fixedly connected to the middle of the combustion chamber 2, a feed box 4 is fixedly connected to the top of the combustion chamber 2, a discharge box 5 is fixedly connected to the bottom of the feed box 4, a motor 16 is fixedly connected to the outer side of the feed box 4, a discharge plate 13 is fixedly connected to the output end of the motor 16, a chain transport assembly 6 is arranged inside the combustion chamber 2, the discharge plate 13 can be driven by the motor 16 to work, and the fuel in the feed box 4 can be transported to the discharge box 5 at intervals, and the incoming fuel can fall into the top of the chain transport assembly 6, the chain transport assembly 6 consists of two sprockets, a chain and a plurality of baffles, when one of the sprockets rotates, the two sprockets can rotate at the same time, and the chain can drive the baffle to move, so that the fallen fuel can be transported, and the chain transport assembly 6 is a prior art, which will not be described in detail in the text.

[0034] Reference Figure 2A auger feeding assembly 7 is provided in the middle of the combustion chamber 2. The auger feeding assembly 7 is composed of a cylinder, an auger and a motor, wherein the auger is fixed at the output end of the motor. By driving the motor, the auger can discharge the burned fuel from the interior of the combustion chamber 2. The auger feeding assembly 7 is a prior art and will not be described in detail in this article. A connecting assembly is provided between the feeding plate 13 and the chain transport assembly 6. The feeding plate 13 and the chain transport assembly 6 can be connected through the connecting assembly, and then the chain transport assembly 6 can work when the feeding plate 13 is working, and the fuel can be delivered into the combustion chamber 2 in batches for combustion, thereby ensuring the combustion efficiency.

[0035] Reference Figure 2 and Figure 3 An exhaust pipe 8 is fixedly connected to the right side of the combustion chamber 2, and the other end of the exhaust pipe 8 is fixedly connected to a shell body 9. A filter box 10 is slidably connected to the middle part of the shell body 9. A connecting pipe 11 is fixedly connected to the rear side of the filter box 10, and a diverter box 12 is fixedly connected to the other end of the connecting pipe 11. The diverter box 12 is fixedly connected to the middle part of the discharge box 5. The smoke generated by the combustion can enter the shell body 9 through the exhaust pipe 8, and impurities in the smoke can be filtered under the action of the filter box 10. At this time, the filtered gas can enter the diverter box 12 under the action of the connecting pipe 11, and the gas can be diverted and blown to the falling fuel under the action of the diverter box 12, so that the fuel can be dried and preheated, thereby improving the efficiency of fuel combustion. At the same time, the remaining heat in the smoke can be utilized, thereby preventing heat loss. A cleaning component is rotatably connected to the middle part of the filter box 10.

[0036] Reference Figure 2 and Figure 3 The connecting component includes two pulleys 14, one of which is fixedly connected to the end of the unloading plate 13 away from the motor 16, and the other pulley 14 is fixedly connected to the outside of the chain transport component 6. The outer periphery of the two pulleys 14 is sleeved with a synchronous belt 15. When the motor 16 is working, the unloading plate 13 can drive one of the pulleys 14 to rotate. At this time, under the action of the synchronous belt 15, the two pulleys 14 can rotate at the same time, and then the fallen fuel can be transported to the combustion chamber 2 for combustion. A sleeve 27 is fixedly connected to the middle part of the combustion chamber 2, and the two pulleys 14 are both arranged inside the sleeve 27. The sleeve 27 can prevent heat loss, and then the heat can be stored inside the combustion chamber 2.

[0037] Reference Figure 4 and Figure 6The cleaning component includes a rotating rod 21, the outer side of the rotating rod 21 is fixedly connected to a shell 22, the interior of the shell 22 is fixedly connected to a compression spring 23, the other end of the compression spring 23 is fixedly connected to a scraper 24, the scraper 24 is in contact with the filter box 10, and when the rotating rod 21 rotates, the shell 22 can be driven to rotate. At this time, under the action of the compression spring 23, the scraper 24 can be attached to the filter box 10 and rotate around the rotating rod 21, so that the impurities filtered by the filter box 10 can be swept to both sides of the interior of the filter box 10, which can reduce the speed at which the filter box 10 is blocked by impurities, thereby increasing the sustainable use time of the filter box 10. The bottom of the shell 9 is fixedly connected to a driving component.

[0038] Reference Figure 4 and Figure 5 The driving assembly includes a motor 25, which is fixedly connected to the bottom of the housing 9. The output end of the motor 25 is fixedly connected to a sleeve 17, and a compression spring 19 is fixedly connected to the inside of the sleeve 17. The other end of the compression spring 19 is fixedly connected to a T-bar 18. The outer side of the T-bar 18 is fixedly connected to a limit block 20, and the limit block 20 and the rotating rod 21 are plugged together. The front side of the housing 9 is rotatably connected with a sealing flap 28. The sleeve 17 can be driven to rotate by driving the motor 25. When the sleeve 17 rotates, the T-bar 18 and the limit block 20 can drive the rotating rod 21 to rotate, thereby cleaning the impurities inside the filter box 10 to both sides. At the same time, when the filter box 10 is blocked, the limit block 20 can be separated from the rotating rod 21 by opening the sealing flap 28 and pulling the T-bar 18. At the same time, when the T-bar 18 moves downward, the compression spring 19 will be compressed. At this time, the filter box 10 can be pulled out by pulling the filter box 10, thereby quickly cleaning the filter box 10.

[0039] Reference Figure 2 and Figure 3 , by pulling the T-bar 18 and inserting the filter box 10 into the housing 9, after the filter box 10 is fully inserted, the T-bar 18 is loosened and the limit block 20 can be inserted into the rotating rod 21 under the action of the compression spring 19. When the limit block 20 enters the rotating rod 21, the sleeve 17 is driven to rotate by the driving motor 25. When the rotating rod 21 and the limit block 20 are parallel, the T-bar 18 can be pushed out under the action of the compression spring 19, and then the limit block 20 can enter the rotating rod 21, so that the sleeve 17 and the rotating rod 21 can be connected, and at the same time, the filter box 10 can be limited to prevent the filter box 10 from being displaced during use.

[0040] Reference Figure 6 A limiting groove 26 is provided at the bottom of the rotating rod 21, and the limiting block 20 is specifically plugged into the limiting groove 26. The limiting block 20 can be limited by the limiting groove 26. At the same time, when the limiting block 20 enters, the T-shaped rod 18 can drive the rotating rod 21 to rotate, thereby cleaning the filter surface of the filter box 10.

[0041] Reference Figure 1and Figure 2 The bottom of the shell 9 is fixedly connected with a cover body, and the motor 25 is specifically fixedly connected inside the cover body. The cover body can protect the motor 25 to prevent the motor 25 from being damaged by water on the ground, and can provide support for the motor 25.

[0042] Reference Figure 4 A handle is fixedly connected to the right side of the filter box 10, and the filter box 10 can be pulled out and cleaned more conveniently and comfortably through the handle.

[0043] Working principle: When in use, the unloading plate 13 can deliver the fuel in the feed box 4 into the unloading box 5 and drop it onto the top of the chain transport assembly 6 by driving the motor 16. At the same time, when the unloading plate 13 is working, the chain transport assembly 6 can transport the fuel to the inside of the base 1 for combustion under the action of the synchronous belt 15 and the pulley 14. At this time, the burning flue gas enters the shell 9 through the exhaust pipe 8 and the impurities in the flue gas can be filtered under the action of the filter box 10. The filtered flue gas can pass through the diverter box 12 through the connecting pipe 11 to dry the fallen fuel.

[0044] Among them, the sleeve 17 can drive the filter box 10 to rotate by driving the second motor 25, and then the scraper 24 can clean the impurities filtered in the filter box 10. At the same time, when the filter box 10 is blocked, the sealing flap 28 can be opened and the T-bar 18 can be pulled downward, so that the T-bar 18 can compress the compression spring 19, and at the same time, the limit block 20 and the rotating rod 21 can be separated. At this time, the filter box 10 can be taken out and cleaned.

[0045] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A biomass boiler for recovering waste heat from flue gas, comprising a base (1), characterized in that: The top of the base (1) is fixedly connected to a combustion chamber (2), the middle of the combustion chamber (2) is fixedly connected to a water tank (3), the top of the combustion chamber (2) is fixedly connected to a feed box (4), the bottom of the feed box (4) is fixedly connected to a discharge box (5), the outer side of the feed box (4) is fixedly connected to a motor 1 (16), the output end of the motor 1 (16) is fixedly connected to a discharge plate (13), a chain transport assembly (6) is arranged inside the combustion chamber (2), a screw conveyor assembly (7) is arranged in the middle of the combustion chamber (2), and the lower A connecting assembly is provided between the material plate (13) and the chain transport assembly (6); an exhaust pipe (8) is fixedly connected to the right side of the combustion chamber (2); the other end of the exhaust pipe (8) is fixedly connected to a shell (9); a filter box (10) is slidably connected to the middle of the shell (9); a connecting pipe (11) is fixedly connected to the rear side of the filter box (10); the other end of the connecting pipe (11) is fixedly connected to a diverter box (12); the diverter box (12) is fixedly connected to the middle of the lower material box (5); and a cleaning assembly is rotatably connected to the middle of the filter box (10).

2. The biomass boiler for recovering waste heat from flue gas according to claim 1 is characterized in that: The connecting assembly comprises two pulleys (14), one of which is fixedly connected to an end of the unloading plate (13) away from the motor (16), and the other pulley (14) is fixedly connected to the outside of the chain transport assembly (6), and a synchronous belt (15) is sleeved on the outer periphery of the two pulleys (14).

3. The biomass boiler for recovering waste heat from flue gas according to claim 1 is characterized in that: The cleaning assembly comprises a rotating rod (21), the outer side of the rotating rod (21) is fixedly connected to a housing (22), the interior of the housing (22) is fixedly connected to a second compression spring (23), the other end of the second compression spring (23) is fixedly connected to a scraper (24), the scraper (24) is in contact with the filter box (10), and the bottom of the housing (9) is fixedly connected to a driving assembly.

4. The biomass boiler for recovering waste heat from flue gas according to claim 3 is characterized in that: The driving assembly comprises a second motor (25), the second motor (25) being fixedly connected to the bottom of the housing (9), the output end of the second motor (25) being fixedly connected to a sleeve (17), the interior of the sleeve (17) being fixedly connected to a first compression spring (19), the other end of the first compression spring (19) being fixedly connected to a T-shaped rod (18), the outer side of the T-shaped rod (18) being fixedly connected to a limit block (20), the limit block (20) and the rotating rod (21) being plug-fitted, and the front side of the housing (9) being rotatably connected to a sealing flap (28).

5. The biomass boiler for recovering waste heat from flue gas according to claim 2 is characterized in that: A casing (27) is fixedly connected to the middle of the combustion chamber (2), and the two pulleys (14) are both arranged inside the casing (27).

6. The biomass boiler for recovering waste heat from flue gas according to claim 4 is characterized in that: The bottom of the shell (9) is fixedly connected with a cover body, and the second motor (25) is specifically fixedly connected inside the cover body.

7. The biomass boiler for recovering waste heat from flue gas according to claim 1 is characterized in that: A handle is fixedly connected to the right side of the filter box (10).

8. The biomass boiler for recovering waste heat from flue gas according to claim 4, characterized in that: A limiting groove (26) is provided at the bottom of the rotating rod (21), and the limiting block (20) is specifically plugged into and matched with the limiting groove (26).

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