Fire coal and biomass coupling combustion device

Abstract

The utility model discloses a fire coal and biomass coupling combustion device which comprises a conveying device, a storage bin, a primary air pipeline, a boiler and an air inlet system, the conveying device comprises a feeding bin, a spiral feeding rod is arranged in the feeding bin, an inlet of the feeding bin comprises a pulverized coal feeding port and a biomass feeding port, an outlet of the feeding bin is connected with the storage bin, and the primary air pipeline is connected with the boiler. An outlet of the storage bin is connected with the primary air pipeline, an outlet of the primary air pipeline is communicated with the interior of the boiler, and the air inlet system is communicated with the storage bin and used for leading pulverized coal and biomass mixtures in the storage bin into the primary air pipeline. Pulverized coal and biomass are coupled through the conveying device and then conveyed into the storage bin, the pulverized coal and the biomass in the storage bin are conveyed into the boiler through the air inlet system to be combusted, and the combustion effect of the boiler is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a boiler power generation technical field more specifically, relate to a coal and biomass coupling combustion device. BACKGROUND

[0002] Biomass is the fourth largest energy in the world, its main feature is renewable, low sulfur content, can effectively reduce the SO2 concentration in flue gas, and realizes CO2 zero emission, is a kind of clean low-carbon fuel.Biomass power generation has economic, ecological and social comprehensive benefits, can alleviate the increasingly prominent energy shortage and environmental degradation problem.

[0003] The coal and biomass coupling combustion system and boiler with the authorization announcement number CN214425975U disclose a kind of coal and biomass coupling combustion system and boiler, it although can realize the coupling combustion of biomass and coal, but coal powder and biomass are coupled and transported into boiler and are burned by air inlet system in terminal, the coupling effect of coal powder and biomass is poor in this way, to affect the combustion effect of boiler, therefore, it is urgently needed to improve. UTILITY MODEL CONTENT

[0004] The utility model aims at overcoming the deficiency of prior art, provide a kind of coal and biomass coupling combustion device, coal powder and biomass are coupled and transported into storage bin by being set up conveying device, then coal powder and biomass in storage bin are transported into boiler and are burned by air inlet system, effectively improve the combustion effect of boiler.

[0005] In order to achieve the above object, the utility model adopts the following technical scheme: a kind of coal and biomass coupling combustion device, including conveying device, storage bin, primary air duct, boiler and air inlet system, the conveying device includes feeding bin, the spiral feeding rod is equipped in the feeding bin, the inlet of the feeding bin includes coal powder feed inlet and biomass feed inlet, the outlet of the feeding bin is connected with storage bin, the outlet of the storage bin is connected with primary air duct, the outlet of primary air duct is communicated with the inside of boiler, the air inlet system is communicated with the storage bin, for the coal powder and biomass mixture in the storage bin is passed into primary air duct.

[0006] Further, the air inlet system includes air blower and air inlet duct, the air inlet duct is communicated with storage bin, the air blower can pass through air inlet duct and pass the coal powder and biomass mixture in storage bin into primary air duct.

[0007] Further, the outer wall of the conveying device is provided with interlayer, the boiler includes flue and flue gas duct, the flue and flue gas duct are communicated, the flue gas duct includes first smoke inlet pipe, the first smoke inlet pipe is communicated with interlayer inlet.

[0008] Further, the secondary air pipe is sleeved outside the primary air pipe, the secondary air pipe is communicated with the inside of the boiler, and the secondary air pipe is communicated with the interlayer outlet through the first flue gas return pipe.

[0009] Further, the air inlet pipe is sleeved with a sleeve pipe, the flue gas pipe comprises a second flue gas inlet pipe, and the second flue gas inlet pipe is communicated with the inlet of the sleeve pipe.

[0010] Further, the outlet of the sleeve pipe is communicated with the secondary air pipe through the second flue gas return pipe.

[0011] Further, the first flue gas inlet pipe is provided with a first induced draft fan, and the second flue gas inlet pipe is provided with a second induced draft fan.

[0012] Further, the outlet of the feeding bin is installed with an on-off valve between the storage bin.

[0013] Further, the coal powder conveying device is connected to the storage bin and used for conveying the coal powder into the storage bin, the coal powder conveying device comprises an adjusting valve, and the adjusting valve is used for adjusting the amount of the coal powder entering the storage bin.

[0014] According to the coal powder and biomass mixed fuel feeding device, the following beneficial effects are achieved:

[0015] When the device is operated, the coal powder and the biomass are added into the feeding bin from the coal powder feeding port and the biomass feeding port respectively, the motor drives the spiral feeding rod to rotate, the coal powder and the biomass are spirally conveyed to the outlet of the feeding bin and then stored in the storage bin, in the conveying process, the coal powder and the biomass are mixed by the spiral feeding rod, so that the material in the storage bin is the mixture of the coal powder and the biomass, the mixture in the storage bin is burned in the boiler through the primary air pipe of the air inlet system, and the mixture can be further mixed in the primary air pipe, so that the mixture entering the boiler can be mixed more uniformly, and the combustion effect of the coal powder and biomass mixture is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic view of the embodiment.

[0017] Reference numerals: 1. Conveying device; 11. Feeding bin; 12. Pulverized coal inlet; 13. Biomass inlet; 14. Screw feeder; 15. Jacket; 16. Motor; 2. Storage bin; 3. Primary air duct; 4. Boiler; 41. Flue; 42. Flue gas duct; 43. First flue gas inlet duct; 44. Second flue gas inlet duct; 45. First induced draft fan; 46. Second induced draft fan; 47. First return flue gas duct; 48. Second return flue gas duct; 5. Air intake system; 51. Blower; 52. Air intake duct; 53. Casing; 6. Secondary air duct; 7. On / off valve; 8. Pulverized coal conveying device; 9. Regulating valve. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] like Figure 1 As shown, this embodiment discloses a coal-biomass coupled combustion device, including a conveying device 1, a storage bin 2, a primary air duct 3, a boiler 4, and an air intake system 5. The conveying device 1 includes a feeding bin 11 and a motor 16. The feeding bin 11 is equipped with a screw feeder 14, and the motor 16 can drive the screw feeder 14 to rotate. The inlet of the feeding bin 11 includes a pulverized coal inlet 12 and a biomass inlet 13. The outlet of the feeding bin 11 is connected to the storage bin 2, and the outlet of the storage bin 2 is connected to the primary air duct 3. The outlet of the primary air duct 3 is connected to the interior of the boiler 4. The air intake system 5 is connected to the storage bin 2 and is used to introduce the pulverized coal and biomass mixture in the storage bin 2 into the primary air duct 3. The air intake system 5 includes a blower 51 and an air intake duct 52. The air intake duct 52 is connected to the storage bin 2, and the blower 51 can introduce the pulverized coal and biomass mixture in the storage bin 2 into the primary air duct 3 through the air intake duct 52.

[0020] In operation, the pulverized coal and the biomass are added into the feeding bin 11 from the pulverized coal feeding port 12 and the biomass feeding port 13 respectively, the motor 16 drives the spiral feeding rod 14 to rotate, and the pulverized coal and the biomass are spirally conveyed to the outlet of the feeding bin 11 and then into the storage bin 2. In the conveying process, the pulverized coal and the biomass are mixed by the spiral feeding rod 14, so that the mixture entering the storage bin 2 is a mixture of the pulverized coal and the biomass. The mixture in the storage bin 2 is introduced into the boiler 4 from the primary air pipe 3 by the air inlet system 5 for combustion, and the mixture can be further mixed in the primary air pipe 3, so that the mixture entering the boiler 4 can be mixed more uniformly, which is beneficial to improve the combustion effect of the pulverized coal and biomass mixture.

[0021] The outer wall of the conveying device 1 is provided with a sandwich layer 15. The boiler 4 comprises a flue 41 and a flue gas pipe 42. The flue 41 and the flue gas pipe 42 are communicated. The flue gas pipe 42 comprises a first flue gas inlet pipe 43 which is communicated with the inlet of the sandwich layer 15. The boiler 4 further comprises a secondary air pipe 6 which is sleeved outside the primary air pipe 3 and is communicated with the inside of the boiler 4. The secondary air pipe 6 is communicated with the outlet of the sandwich layer 15 through a first flue gas return pipe 47. A sleeve pipe 53 is sleeved outside the air inlet pipe 52. The flue gas pipe 42 comprises a second flue gas inlet pipe 44 which is communicated with the inlet of the sleeve pipe 53. The outlet of the sleeve pipe 53 is communicated with the secondary air pipe 6 through a second flue gas return pipe 48. The first flue gas inlet pipe 43 is provided with a first induced draft fan 45. The second flue gas inlet pipe 44 is provided with a second induced draft fan 46.

[0022] The combustion of the biomass and the pulverized coal produces a large amount of flue gas with high temperature. A small part of the flue gas enters the flue gas pipe 42, passes through the first induced draft fan 45, enters the sandwich layer 15 from the first flue gas inlet pipe 43, and heats the feeding bin 11. The pulverized coal and the biomass are preheated through the feeding bin 11. The cooled flue gas enters the secondary air pipe 6 from the first flue gas return pipe 47. The flue gas enters the sleeve pipe 53 from the second flue gas inlet pipe 44 through the second induced draft fan 46, heats the air inlet pipe 52, and makes the air entering the storage bin 2 hot air. The cooled flue gas enters the secondary air pipe 6 from the second flue gas return pipe 48. Through the above design, the mixture of the air, the pulverized coal and the biomass in the primary air pipe 3 can be preheated, which greatly improves the combustion efficiency of the pulverized coal and the biomass. Moreover, the cooled flue gas enters the boiler 4 from the secondary air pipe 6 again, realizing the recycling of the flue gas.

[0023] A switch valve 7 is installed between the outlet of the feeding bin 11 and the storage bin 2. When the storage bin 2 is feeding, the switch valve 7 is in a closed state. When the storage bin 2 stops feeding, the switch valve 7 is opened, and the material in the feeding bin 11 can be fed into the storage bin 2.

[0024] Further comprising a pulverized coal conveying device 8 connected to the storage bin 2 for conveying pulverized coal into the storage bin 2, the pulverized coal conveying device 8 comprising a regulating valve 9 for regulating the amount of pulverized coal entering the storage bin 2, as the types of biomass are various, some sludge type biomass has a much poorer effect of individual combustion than pulverized coal, therefore, when the operator observes that the combustion effect in the boiler 4 is poor, the pulverized coal can be quickly conveyed into the boiler 4 through the pulverized coal conveying device 8 to increase the proportion of pulverized coal in the boiler 4, thereby ensuring the combustion effect in the boiler 4 and enabling the biomass to be more fully combusted.

[0025] The preferred embodiments of the present application have been described above, the protection scope of the present application is not limited to the above-mentioned embodiments, any technical scheme falling within the concept of the present application belongs to the protection scope of the present application. It should be noted that, for ordinary skilled in the art, some improvements and refinements without departing from the principles of the present application, these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A coal-biomass coupled combustion device, characterized in that, The system includes a conveying device (1), a storage bin (2), a primary air duct (3), a boiler (4), and an air intake system (5). The conveying device (1) includes a feeding bin (11), which is equipped with a screw feeder (14). The inlet of the feeding bin (11) includes a pulverized coal inlet (12) and a biomass inlet (13). The outlet of the feeding bin (11) is connected to the storage bin (2). The outlet of the storage bin (2) is connected to the primary air duct (3). The outlet of the primary air duct (3) is connected to the interior of the boiler (4). The air intake system (5) is connected to the storage bin (2) and is used to introduce the pulverized coal and biomass mixture in the storage bin (2) into the primary air duct (3).

2. The coal-biomass coupled combustion device according to claim 1, characterized in that, The air intake system (5) includes a blower (51) and an air intake duct (52). The air intake duct (52) is connected to the storage silo (2). The blower (51) can pass the coal powder and biomass mixture in the storage silo (2) into the primary air duct (3) through the air intake duct (52).

3. The coal-biomass coupled combustion device according to claim 2, characterized in that, The outer wall of the conveying device (1) is provided with a jacket (15). The boiler (4) includes a flue (41) and a flue gas pipe (42). The flue (41) and the flue gas pipe (42) are connected. The flue gas pipe (42) includes a first flue gas inlet pipe (43). The first flue gas inlet pipe (43) is connected to the inlet of the jacket (15).

4. The coal-biomass coupled combustion device according to claim 3, characterized in that, It also includes a secondary air duct (6), which is fitted outside the primary air duct (3). The secondary air duct (6) is connected to the inside of the boiler (4), and the secondary air duct (6) is connected to the outlet of the interlayer (15) through the first return smoke duct (47).

5. The coal-biomass coupled combustion device according to claim 4, characterized in that, The air inlet duct (52) is fitted with a sleeve (53) on the outside, and the flue gas duct (42) includes a second smoke inlet duct (44), which is connected to the inlet of the sleeve (53).

6. The coal-biomass coupled combustion device according to claim 5, characterized in that, The outlet of the sleeve (53) is connected to the secondary air duct (6) through the second return smoke duct (48).

7. The coal-biomass coupled combustion device according to claim 6, characterized in that, The first smoke inlet duct (43) is equipped with a first induced draft fan (45), and the second smoke inlet duct (44) is equipped with a second induced draft fan (46).

8. The coal-biomass coupled combustion device according to claim 1, characterized in that, An on / off valve (7) is installed between the outlet of the feeding bin (11) and the storage bin (2).

9. The coal-biomass coupled combustion device according to claim 1, characterized in that, It also includes a pulverized coal conveying device (8), which is connected to the storage silo (2) and is used to convey pulverized coal into the storage silo (2). The pulverized coal conveying device (8) includes a regulating valve (9), which is used to regulate the amount of pulverized coal entering the storage silo (2).

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