Gasification coupling combustion device suitable for whole bundle of straw

Abstract

The utility model discloses a gasification coupling combustion device suitable for a whole bundle of straw, which belongs to a combustion boiler device and comprises a combustion furnace body, a furnace front feeding device and a fire grate, the combustion furnace body is divided into a gasification chamber and a combustion chamber by a combustion chamber front wall along the straw conveying direction, and the gasification chamber and the combustion chamber are communicated front and back. A plurality of bundle breaking devices are arranged in the gasification chamber in the conveying direction. A plurality of combustible gas outlets are formed in the front wall of the combustion chamber and located at the top of the gasification chamber, and the combustible gas outlets are located in the combustion chamber and correspondingly provided with fuel gas drainage plates; the stokehole feeding device is correspondingly arranged at the front end of the gasification chamber; the fire grate is correspondingly arranged at the bottom of the combustion furnace body in the conveying direction, a plurality of air chambers are distributed in the fire grate in the conveying direction, and the air chambers communicate with external air. According to the utility model, the direct combustion and utilization of the whole bundle of straws can be realized, and the emission of original NOx is reduced.

Description

Technical Field

[0001] The utility model relates to a combustion boiler device, in particular to a gasification coupled combustion device suitable for whole bundles of straw. Background Art

[0002] my country has abundant biomass energy resources and diverse ways to utilize them. After years of development, mechanized harvesting technology for various crop straws (such as corn straw and wheat straw) has matured. Mechanically harvested straw is typically compressed into round or square bales for easier transportation. Currently, bundled straw must be crushed and re-transported before being used for energy (power generation, heating, etc.), increasing utilization costs and creating significant dust accumulation at the crushing site, posing a significant safety hazard. Utility Model Content

[0003] Technical problems to be solved: In view of the technical problems existing in the background technology, the utility model provides a gasification coupled combustion device suitable for whole bundles of straw, which can realize the direct combustion utilization of the whole bundle of straw and reduce the original NO x emissions.

[0004] Technical solution: The utility model discloses a gasification-coupled combustion device suitable for whole straw bales, which includes:

[0005] The combustion furnace body is divided into a gasification chamber and a combustion chamber connected front and back along the straw conveying direction by the front wall of the combustion chamber; a plurality of bale breaking devices are arranged in the gasification chamber along the conveying direction; a plurality of combustible gas outlets are arranged on the front wall of the combustion chamber at the top of the gasification chamber, and a gas guide plate is arranged corresponding to the combustible gas outlet in the combustion chamber;

[0006] A furnace front feeding device, the furnace front feeding device is correspondingly arranged at the front end of the gasification chamber;

[0007] The grate is arranged at the bottom of the combustion furnace body along the conveying direction, and a plurality of air chambers are distributed in the grate along the conveying direction, and the air chambers are respectively connected to the external air.

[0008] Preferably, the combustion chamber includes a first combustion chamber connected to the gasification chamber through a channel at the lower end of the front wall of the combustion chamber and a second combustion chamber connected to the gasification chamber through a combustible gas outlet, and the second combustion chamber is located at the top of the first combustion chamber; the center line of the second combustion chamber is arranged to coincide with the center line of the combustible gas outlet at the top of the gasification chamber.

[0009] Preferably, the furnace feeding device includes a silo, a cooling jacket, a directional material plate, and a material plate support assembly;

[0010] The silo is correspondingly arranged at the top of the front end of the combustion furnace body. The silo is a tapered structure with a wide top and a narrow bottom, and a discharge throat is provided at its lower end;

[0011] The cooling jacket is correspondingly sleeved on the circumference of the feeding throat;

[0012] The oriented material plate is tiltedly arranged in the discharge throat, the top of the oriented material plate is hinged on the side wall of the discharge throat, and the bottom of the oriented material plate is supported on the side wall of the silo through the material plate support assembly at its rear end, and the oriented material plate is flipped along the front end of the material plate support assembly. When the oriented material plate is flipped upward, the discharge throat can be completely closed.

[0013] Preferably, the sheet material support assembly is an elastic structure, and the sheet material support assembly can support the oriented sheet material at an angle of 30 to 60 degrees in the discharge throat.

[0014] Preferably, the furnace wall of the combustion furnace body is an insulating furnace wall; and the bundle breaking device is a bundle breaking tooth roller structure.

[0015] Preferably, a flue gas channel is provided on the top of the second combustion chamber, and a secondary air nozzle is provided on the side wall of the flue gas channel.

[0016] Preferably, two water pipe supports are provided on the top of the front wall of the combustion chamber at both sides of the top of the gasification chamber, and a plurality of water cooling pipes are provided in parallel along the conveying direction between the water pipe supports.

[0017] Preferably, the gas guide plates are arranged in sequence towards the rear wall and the front wall of the combustion chamber, the width of each gas guide plate is 3 to 10 water cooling pipe diameters and pipe spacings, and the distance between two gas guide plates is 2 to 5 water cooling pipe diameters and pipe spacings.

[0018] Preferably, the air chamber is divided into a front air chamber, a middle air chamber and a rear air chamber along the conveying direction, and the combustion excess oxygen coefficients of the control areas of the front air chamber, the middle air chamber and the rear air chamber increase in sequence.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The gasification coupled combustion device of this utility model can realize the direct combustion utilization of the whole bundle of straw and reduce the original NO x emissions;

[0021] 2. The reducing gas (CO, H2, CH4, etc.) in the combustible gas produced in the gasification chamber of the gasification coupling combustion device enters from the center line of the combustion chamber, promoting the reduction gas to react with the large amount of NO produced in the first combustion chamber. x Get full contact to increase NO x The reduction rate of the original NO x Emission concentration;

[0022] 3. The gas guide plate can guide the large amount of combustible gas generated in the gasification chamber to have a sufficient residence time in the combustion chamber and generate a certain degree of turbulence, thereby promoting the full mixing of the combustible gas and the flue gas and achieving the combustion of the combustible gas;

[0023] 4. After a whole bundle of straw is put into the silo, the feeding device in front of the furnace drives the directional material plate to flip over and drop into the gasification chamber under the action of its own weight to realize feeding, and guides the bundled straw to fall horizontally into the gasification chamber, reducing the difficulty of subsequent bale breaking; after the feeding is completed, the directional material plate is reset under the action of the material plate support assembly, isolating the gasification chamber and the silo to prevent a large amount of air from entering the gasification chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a front view of the internal structure of the gasification coupled combustion device of the present utility model;

[0025] Figure 2 for Figure 1 Top view of the layout structure of the gas guide plate at the top outlet of the middle gasification chamber.

[0026] Figure numerals: 1. Combustion furnace body; 2. Front wall of combustion chamber; 3. Gasification chamber; 4. Combustion chamber; 5. First combustion chamber; 6. Second combustion chamber; 7. Gas guide plate; 8. Flue gas duct; 9. Secondary air nozzle; 10. Combustible gas outlet; 11. Front feeding device of furnace; 12. Material bin; 13. Cooling jacket; 14. Directed material plate; 15. Material plate support assembly; 16. Bundle breaking device; 17. Grate; 18. Front air chamber; 19. Middle air chamber; 20. Rear air chamber; 21. Water pipe bracket; 22. Water cooling pipe; 23. Rear wall of combustion chamber. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following Figures 1 and 2 The technical solutions of the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0028] like Figure 1As shown, the utility model is a gasification coupled combustion device suitable for whole bales of straw, which includes a combustion furnace body 1, a front feeding device 11 and a grate 17. The combustion furnace body 1 is divided into a front-to-back connected gasification chamber 3 and a combustion chamber 4 by a combustion chamber front wall 2 along the straw conveying direction. A passage connecting the gasification chamber 3 and the combustion chamber 4 is provided at the lower end of the combustion chamber front wall 2. The combustion chamber 4 includes a first combustion chamber 5 connected to the gasification chamber 3 through a passage at the lower end of the combustion chamber front wall 2 and a second combustion chamber 6 connected to the gasification chamber 3 through a combustible gas outlet 10, and the second combustion chamber 6 is located at the top of the first combustion chamber 5; the center line of the second combustion chamber 6 coincides with the center line of the combustible gas outlet 10 at the top of the gasification chamber 3, the combustion chamber front wall 2 is provided with multiple combustible gas outlets 10 at the top of the gasification chamber 3, and the combustible gas outlets 10 are located in the combustion chamber 4 and are correspondingly provided with a gas guide plate 7. During operation, the reducing gas (CO, H2, CH4, etc.) in the combustible gas produced by the gasification chamber 3 enters from the center line of the combustion chamber 4, and the reducing gas is promoted to react with the large amount of NO produced in the first combustion chamber 5 as much as possible. x Get full contact to increase NO x The reduction rate of the original NO x The gas guide plate 7 can guide the large amount of combustible gas generated in the gasification chamber 3 to have a sufficient residence time in the combustion chamber 4 and generate a certain degree of turbulence, thereby promoting the full mixing of the combustible gas and the flue gas and achieving the combustion of the combustible gas.

[0029] The front-of-furnace feeding device 11 is correspondingly arranged at the front end of the gasification chamber 3 and includes a silo 12, a cooling jacket 13, an oriented feed plate 14, and a feed plate support assembly 15. The silo 12 is correspondingly arranged at the top of the front end of the combustion furnace body 1. The silo 12 is a tapered structure that is wide at the top and narrow at the bottom. A feed throat is provided at its lower end. The cooling jacket 13 is correspondingly sleeved around the feed throat to cool the feed throat to prevent premature combustion of the straw. The oriented feed plate 14 is tilted and arranged in the feed throat. The top of the oriented feed plate 14 is hinged to the side wall of the feed throat, and the bottom of the oriented feed plate 14 is supported on the side wall of the silo 12 by the feed plate support assembly 15 at its rear end. The oriented feed plate 14 flips along the front end of the feed plate support assembly 15. When the oriented feed plate 14 flips upward, it can completely seal the feed throat. During operation, after a whole bundle of straw is put into the hopper 12, its own weight drives the directional material plate 14 to flip and fall into the gasification chamber 3 to realize feeding, guiding the bundled straw to fall horizontally into the gasification chamber 3, reducing the difficulty of subsequent bale breaking; after the feeding is completed, the directional material plate 14 is reset under the action of the material plate support assembly 15, isolating the gasification chamber 3 and the hopper 12, and preventing a large amount of air from entering the gasification chamber 3.

[0030] In a preferred embodiment, the plate support assembly 15 is an elastic structure comprising a connecting rod and a support spring mounted on the connecting rod. The front end of the connecting rod is supported on the back side of the oriented plate 14, and the support spring is correspondingly compressed between the connecting rod and the side wall of the silo 12. When a full bale of straw is fed, the oriented plate 14 is rotated along its hinge, thereby driving the connecting rod backward to compress the support spring, thereby allowing the entire bale to pass through the discharge throat and enter the gasification chamber 3. After the entire bale of straw passes through the discharge throat, the connecting rod advances under the action of the support spring, pushing the oriented plate 14 forward and returning it to its original position, completing a discharge cycle. The plate support assembly 15 can support the oriented plate 14 at a 30-60° angle within the discharge throat, thereby facilitating the discharge of the entire bale of straw and applying force to the oriented plate 14.

[0031] Multiple groups of bale breaking devices 16 are arranged in the gasification chamber 3 along the conveying direction. The bale breaking devices 16 are bale breaking tooth roller structures. As the whole bundle of straw moves along several directions, each bale breaking device 16 can break the straw and improve the gasification effect of the straw.

[0032] The furnace walls of the combustion furnace body 1 are insulated, meaning that the side walls forming the vaporization chamber 3 and combustion chamber 4 are all insulated, thereby improving the combustion efficiency of the combustion furnace body 1. Two water pipe brackets 21 are installed on the top of the combustion chamber front wall 2, located on either side of the top of the vaporization chamber 3. The water pipes are connected by a steel structure. Multiple water cooling pipes 22 are installed parallel to the water pipe brackets 21 along the conveying direction. These water cooling pipes 22 cool the combustion chamber front wall 2.

[0033] In a preferred embodiment, if Figure 2 As shown, the gas guide plates 7 are arranged in sequence toward the rear wall 23 and the front wall 2 of the combustion chamber. The width of each gas guide plate 7 is 3 to 10 water-cooling pipes 22 diameters and pipe spacing, and the distance between two gas guide plates 7 is 2 to 5 water-cooling pipes 22 diameters and pipe spacing.

[0034] Grate 17 is arranged at the bottom of burner body 1 along the conveying direction, and multiple air chambers are distributed within grate 17 along the conveying direction, each of which is connected to the external air. In a preferred embodiment, the air chambers are divided into a front air chamber 18, a middle air chamber 19, and a rear air chamber 20 along the conveying direction. The control areas of front air chamber 18, middle air chamber 19, and rear air chamber 20 have increasing oxygen excess coefficients, thereby improving the combustion efficiency of straw in burner body 1.

[0035] A flue gas channel 8 is provided on the top of the second combustion chamber 6, and a secondary air nozzle 9 is provided on the side wall of the flue gas channel 8 to reduce the content of combustible gas in the tail gas.

[0036] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A gasification coupled combustion device suitable for whole bales of straw, characterized in that: The gasification coupled combustion device includes: A combustion furnace body (1), wherein the combustion furnace body (1) is divided into a front-to-back connected gasification chamber (3) and a combustion chamber (4) by a combustion chamber front wall (2) along the straw conveying direction; a plurality of bundle breaking devices (16) are provided in the gasification chamber (3) along the conveying direction; a plurality of combustible gas outlets (10) are provided on the combustion chamber front wall (2) at the top of the gasification chamber (3), and a gas guide plate (7) is provided corresponding to the combustible gas outlets (10) located in the combustion chamber (4); A furnace front feeding device (11), the furnace front feeding device (11) being correspondingly arranged at the front end of the gasification chamber (3); The grate (17) is arranged at the bottom of the combustion furnace body (1) along the conveying direction, and a plurality of air chambers are distributed in the grate (17) along the conveying direction, and the air chambers are respectively connected to the external air.

2. The gasification coupled combustion device suitable for whole bales of straw according to claim 1, characterized in that: The combustion chamber (4) comprises a first combustion chamber (5) connected to the gasification chamber (3) through a lower end channel of the combustion chamber front wall (2) and a second combustion chamber (6) connected to the gasification chamber (3) through a combustible gas outlet (10), and the second combustion chamber (6) is located at the top of the first combustion chamber (5); the center line of the second combustion chamber (6) is arranged to coincide with the center line of the combustible gas outlet (10) at the top of the gasification chamber (3).

3. The gasification coupled combustion device applicable to whole bales of straw according to claim 2, characterized in that: The furnace front feeding device (11) includes a hopper (12), a cooling jacket (13), a directional material plate (14), and a material plate support assembly (15); The silo (12) is correspondingly arranged at the top of the front end of the combustion furnace body (1). The silo (12) is a conical structure that is wide at the top and narrow at the bottom, and a discharge throat is provided at the lower end thereof. The cooling jacket (13) is correspondingly sleeved on the circumference of the discharge throat; The oriented material plate (14) is tiltedly arranged in the discharge throat, the top of the oriented material plate (14) is hinged on the side wall of the discharge throat, and the bottom of the oriented material plate (14) is supported on the side wall of the silo (12) through the material plate support component (15) at its rear end, and the oriented material plate (14) is flipped along the front end of the material plate support component (15), and the discharge throat can be completely closed when the oriented material plate (14) is flipped upward.

4. The gasification coupled combustion device applicable to whole bales of straw according to claim 3, characterized in that: The material plate support assembly (15) is an elastic structure, and the material plate support assembly (15) can support the oriented material plate (14) in a 30-60° tilted position in the discharge throat.

5. The gasification coupled combustion device applicable to whole bales of straw according to claim 1, characterized in that: The furnace wall of the combustion furnace body (1) is a heat-insulating furnace wall; and the bundle breaking device (16) is a bundle breaking tooth roller structure.

6. The gasification coupled combustion device applicable to whole bales of straw according to claim 2, characterized in that: A flue gas channel (8) is provided at the top of the second combustion chamber (6), and a secondary air nozzle (9) is provided on the side wall of the flue gas channel (8).

7. The gasification coupled combustion device applicable to whole bales of straw according to claim 1, characterized in that: Two water pipe supports (21) are correspondingly provided on both sides of the top of the combustion chamber front wall (2) and the top of the gasification chamber (3), and a plurality of water cooling pipes (22) are provided in parallel along the conveying direction between the water pipe supports (21).

8. The gasification coupled combustion device applicable to whole bales of straw according to claim 7, characterized in that: The gas guide plates (7) are arranged in sequence with intervals toward the rear wall (23) and the front wall (2) of the combustion chamber, respectively. The width of each gas guide plate (7) is 3 to 10 diameters and pipe spacings of the water-cooling pipes (22), and the distance between two gas guide plates (7) is 2 to 5 diameters and pipe spacings of the water-cooling pipes (22).

9. The gasification coupled combustion device applicable to whole bales of straw according to claim 1, characterized in that: The air chamber is divided into a front air chamber (18), a middle air chamber (19), and a rear air chamber (20) along the conveying direction, and the combustion excess oxygen coefficients of the control areas of the front air chamber (18), the middle air chamber (19), and the rear air chamber (20) increase in sequence.

Images