A waste heat recovery device for biomass power generation

Abstract

The present invention relates to the technical field of biomass power generation, and specifically discloses a waste heat recovery device for biomass power generation, including a chimney pipe that is symmetrical up and down, the chimney pipe is used for exhausting smoke from a biomass power generation incineration chamber, a recovery pipe mechanism is arranged between two chimney pipes, and a conveying mechanism is arranged on the periphery of the recovery pipe mechanism. The waste heat recovery device of the present invention significantly increases the flow path and contact time of flue gas during the recovery process by designing a spiral recovery pipe mechanism and an inner pipe assembly including inner smoke pipe one, inner smoke pipe two and inner smoke pipe three. The liquid in the flue gas can be more fully condensed and collected when flowing through the inner pipe assembly, thereby improving the efficiency of waste heat recovery. At the same time, the design of the vibration mechanism accelerates the flow of the condensed liquid, further ensuring the thoroughness of the recovery.

Description

Technical Field

[0001] The invention belongs to the technical field of biomass power generation, and in particular relates to a waste heat recovery device for biomass power generation. Background Art

[0002] Biomass power generation is the use of biomass energy to generate electricity. It is a type of renewable energy power generation, including direct combustion of agricultural and forestry waste power generation, agricultural and forestry waste gasification power generation, garbage incineration power generation, landfill gas power generation, and biogas power generation. A large amount of high-temperature flue gas will be generated in the process of biomass power generation, which requires the use of waste heat recovery equipment.

[0003] In a Chinese patent with publication number CN116498987B, a waste heat recovery device and method for biomass power generation is mentioned, which relates to the field of biomass power generation technology. This waste heat recovery device for biomass power generation includes a combustion chamber and a chimney arranged on the combustion chamber. The chimney is provided with a recovery mechanism for recovering the heat of high-temperature flue gas. The recovery mechanism includes a water storage box arranged on the side wall of the chimney. The water storage box is provided with a connecting pipe on the side close to the combustion chamber, and the connecting pipe is made of copper. In this waste heat recovery device for biomass power generation, through the setting of the recovery mechanism, under the production action of the production mechanism, water droplets will continuously flow into the water storage box and flow in the connecting pipe spirally wound on the outer wall of the chimney. Then, under the high temperature of the outer wall of the chimney, the water in the connecting pipe will be heated, and the heated water will flow into the water collecting tank for use;

[0004] Although the above-mentioned equipment can reciprocally insert the extraction tube into the chimney so that the smoke can pass near the copper sheet and collect the liquid in the smoke and return the excess smoke, and the collected liquid is heated after passing through the spiral connecting tube so that it can be used, the chimney continuously releases liquid to the outside for a long time, so only part of the liquid in the smoke can be used, and the recovery efficiency will be limited. Summary of the invention

[0005] The purpose of the present invention is to provide a waste heat recovery device for biomass power generation to solve the problems existing in the prior art.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A waste heat recovery device for biomass power generation, comprising a chimney pipe that is symmetrical in upper and lower directions, the chimney pipe is used for exhausting smoke from a biomass power generation incineration chamber, a recovery pipe mechanism is arranged between two of the chimney pipes, and a conveying mechanism is arranged on the periphery of the recovery pipe mechanism; the recovery pipe mechanism comprises a heat-absorbing outer pipe, a liquid-collecting outer pipe and an inner pipe assembly, the inner pipe assembly comprises inner smoke pipe one, inner smoke pipe two and inner smoke pipe three, the inner pipe assembly is located inside the heat-absorbing outer pipe, the inner pipe assembly is used for smoke to pass through, the inner pipe assembly is also used for condensing liquid in the smoke, the heat-absorbing outer pipe cooperates with the conveying mechanism to concentrate the condensed liquid and absorb heat for recycling; the conveying mechanism comprises a supporting frame and a conveying pipe, the conveying pipe is used for continuously conveying the condensed liquid into the heat-absorbing outer pipe, and the conveying pipe cooperates with the supporting frame to vibrate the recovery pipe mechanism to accelerate the flow of condensed liquid.

[0008] Preferably: the recovery pipe mechanism is spiral, both ends of the inner pipe assembly are connected with connecting pipes, the other ends of the connecting pipes are connected to the chimney pipe, one end of the heat absorption outer pipe is provided with an exhaust end, the other end of the heat absorption outer pipe is provided with a liquid inlet end, the end of the heat absorption outer pipe located at the liquid inlet end is provided with a downward discharge end, the delivery pipe is provided with connecting port one and connecting port two, and the liquid inlet end is connected to connecting port one.

[0009] Preferably: the liquid collecting outer tube is fixedly connected to one end of the heat absorbing outer tube and is close to the liquid inlet end. A connecting end is provided at one end of the liquid collecting outer tube, and the connecting end is connected to the second connection port. One end of the inner tube assembly passes through the interior of the liquid collecting outer tube.

[0010] Preferably: the end of the inner smoke tube 1 located inside the liquid collecting outer tube is provided with a liquid outlet terminal 1, the end of the inner smoke tube 2 located inside the liquid collecting outer tube is provided with a liquid outlet terminal 2, and the end of the inner smoke tube 3 located inside the liquid collecting outer tube is provided with a liquid outlet terminal 3.

[0011] Preferably: connecting tube one and connecting tube two are respectively provided at both ends of the inner tube assembly, and connecting tube one and connecting tube two are both located inside the connecting tube, connecting tube one connects the same end of inner smoke tube one and inner smoke tube two, and connecting tube two connects the same end of inner smoke tube two and inner smoke tube three.

[0012] Preferably, the outer peripheries of the inner smoke tube 1, the inner smoke tube 2 and the inner smoke tube 3 are all connected with heat conducting plates which are distributed at equal intervals, and parts of the heat conducting plates are located inside the heat absorbing outer tube.

[0013] Preferably: the support frame is evenly distributed around the periphery of the heat-absorbing outer tube and is connected to the heat-absorbing outer tube through a connecting plate, the support frame is used to support the recovery pipe mechanism, the upper and lower ends of the support frame are fixedly connected with mounting rings, the mounting rings are fixedly connected to the periphery of the chimney pipe, and the delivery pipe is fixedly connected to the support frame.

[0014] Preferably: a driving motor is installed at one end of the conveying pipe, a vibration chamber is opened inside the conveying pipe, a liquid-conducting rotary fan is arranged inside the conveying pipe, an eccentric disk is arranged inside the vibration chamber, and the liquid-conducting rotary fan and the eccentric disk are fixedly connected to the output shaft of the driving motor.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention significantly increases the flow path and contact time of the flue gas during the recovery process by setting up a spiral recovery pipe mechanism and an inner pipe assembly including inner smoke pipe one, inner smoke pipe two and inner smoke pipe three. The liquid in the flue gas can be more fully condensed and collected when flowing through the inner pipe assembly, thereby improving the efficiency of waste heat recovery.

[0017] 2. The present invention sets a spiral recovery pipe mechanism and a conveying mechanism. The heat-absorbing outer tube is not only used to collect condensed liquid, but also effectively absorbs heat energy in the flue gas through its structural design and the configuration of the heat-conducting plates. The heat-conducting plates are evenly and equidistantly inserted into the periphery of the inner tube assembly, ensuring that heat energy can be efficiently transferred to the liquid in the heat-absorbing outer tube. This not only improves the heat recovery rate, but also makes the recovered heat more uniform, which is convenient for subsequent utilization and treatment.

[0018] 3. The conveying mechanism provided in the present invention can not only continuously convey the liquid in the inner tube assembly to the heat-absorbing outer tube, but also give the recovery tube mechanism a certain vibration, thereby accelerating the flow of the condensed liquid and further ensuring the thoroughness of the recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional diagram of the present invention as a whole;

[0020] Figure 2 It is a schematic diagram of the structure of the outside of the recovery pipe mechanism of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the recovery pipe mechanism of the present invention;

[0022] Figure 4 It is a schematic diagram of the structure of the two ends of the recovery pipe mechanism of the present invention;

[0023] Figure 5 It is a schematic diagram of the cross-sectional structure of one end of the recovery pipe mechanism of the present invention;

[0024] Figure 6 It is a structural schematic diagram of a cross section of the other end of the recovery pipe mechanism of the present invention;

[0025] Figure 7 It is a structural schematic diagram of the conveying mechanism of the present invention;

[0026] Figure 8 For the present invention Figure 7 Schematic diagram of the structure of the middle part.

[0027] In the figure:

[0028] 1. Chimney pipe; 2. Connecting pipe;

[0029] 3. Recovery pipe mechanism; 31. Heat absorbing outer pipe; 311. Liquid discharge terminal; 32. Exhaust terminal; 33. Liquid inlet terminal; 34. Liquid collecting outer pipe; 35. Connecting terminal;

[0030] 36, inner tube assembly; 361, inner smoke tube 1; 362, inner smoke tube 2; 363, inner smoke tube 3; 364, heat conducting sheet; 365, connecting tube 1; 366, connecting tube 2;

[0031] 37, liquid outlet terminal one; 38, liquid outlet terminal two; 39, liquid outlet terminal three;

[0032] 4. Conveying mechanism; 41. Support frame; 42. Mounting ring; 43. Conveying pipe; 44. Connection port 1; 45. Connection port 2; 46. Vibration chamber; 47. Driving motor; 48. Liquid-guiding rotary fan; 49. Eccentric disk. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Reference Figure 1-Figure 8 As shown, the present invention provides a waste heat recovery device for biomass power generation, comprising a chimney pipe 1 symmetrical in upper and lower directions, the chimney pipe 1 is used for exhausting smoke from a biomass power generation incineration chamber, a recovery pipe mechanism 3 is arranged between the two chimney pipes 1, and a conveying mechanism 4 is arranged on the periphery of the recovery pipe mechanism 3;

[0035] The recovery pipe mechanism 3 includes a heat absorbing outer pipe 31, a liquid collecting outer pipe 34 and an inner pipe assembly 36. The inner pipe assembly 36 includes an inner smoke pipe 1 361, an inner smoke pipe 2 362 and an inner smoke pipe 3 363. The inner pipe assembly 36 is located inside the heat absorbing outer pipe 31. The inner pipe assembly 36 is used for flue gas to pass through. The inner pipe assembly 36 is also used to condense liquid in the flue gas. The heat absorbing outer pipe 31 cooperates with the conveying mechanism 4 to concentrate the condensed liquid and absorb heat for recycling.

[0036] The conveying mechanism 4 includes a support frame 41 and a conveying pipe 43. The conveying pipe 43 is used to continuously convey the condensed liquid to the heat-absorbing outer tube 31. The conveying pipe 43 cooperates with the support frame 41 to vibrate the recovery pipe mechanism 3 to accelerate the flow of the condensed liquid.

[0037] In a further embodiment, the recovery pipe mechanism 3 is spiral, both ends of the inner pipe assembly 36 are connected to the connecting pipe 2, the other ends of the connecting pipe 2 are connected to the chimney pipe 1, one end of the heat absorbing outer pipe 31 is provided with an exhaust terminal 32, the other end of the heat absorbing outer pipe 31 is provided with a liquid inlet terminal 33, the end of the heat absorbing outer pipe 31 located at the liquid inlet terminal 33 is provided with a downward discharge terminal 311, the delivery pipe 43 is provided with a connecting port 1 44 and a connecting port 2 45, and the liquid inlet terminal 33 is connected to the connecting port 1 44.

[0038] In this embodiment, the liquid inlet end 33 is used for the liquid in the liquid collecting outer tube 34 to enter.

[0039] In a further embodiment, the liquid collecting outer tube 34 is fixedly connected to one end of the heat absorbing outer tube 31 and is close to the liquid inlet end 33. A connecting end 35 is provided at one end of the liquid collecting outer tube 34. The connecting end 35 is connected to the connecting port 2 45. One end of the inner tube assembly 36 passes through the interior of the liquid collecting outer tube 34.

[0040] In this embodiment, the connecting end 35 and the second connecting port 45 are connected through a connecting pipe, and the liquid inlet end 33 and the first connecting port 44 are also connected through a connecting pipe.

[0041] In a further embodiment, the inner smoke tube 1 361 is provided with a liquid outlet terminal 1 37 at one end located inside the liquid collecting outer tube 34, the inner smoke tube 2 362 is provided with a liquid outlet terminal 2 38 at one end located inside the liquid collecting outer tube 34, and the inner smoke tube 3 363 is provided with a liquid outlet terminal 3 39 at one end located inside the liquid collecting outer tube 34.

[0042] In this embodiment, the cross-sections of the inner smoke tube 1 361, the inner smoke tube 2 362 and the inner smoke tube 3 363 are one-third of a circle, and the liquid outlet terminal 1 37, the liquid outlet terminal 2 38 and the liquid outlet terminal 3 39 are the lowest points of the inner smoke tube 1 361, the inner smoke tube 2 362 and the inner smoke tube 3 363 respectively.

[0043] In a further embodiment, connecting tube one 365 and connecting tube two 366 are respectively provided at both ends of the inner tube assembly 36, and connecting tube one 365 and connecting tube two 366 are both located inside the connecting tube 2, connecting tube one 365 connects the same end of inner smoke tube one 361 and inner smoke tube two 362, and connecting tube two 366 connects the same end of inner smoke tube two 362 and inner smoke tube three 363.

[0044] In this embodiment, connecting pipe 1 365 and connecting pipe 2 366 are used to connect inner smoke tube 1 361, inner smoke tube 2 362 and inner smoke tube 3 363 in sequence, thereby increasing the distance of the flue gas when it flows through, thereby increasing the contact time between the flue gas and the multiple heat conducting plates 364, and further increasing the condensation of liquid in the flue gas.

[0045] In a further embodiment, the peripheries of the inner smoke tube 1 361 , the inner smoke tube 2 362 and the inner smoke tube 3 363 are all connected with equidistantly distributed heat conducting plates 364 , and part of the heat conducting plates 364 is located inside the heat absorbing outer tube 31 .

[0046] In this embodiment, a sealing ring is provided at the insertion point of the heat conducting sheet 364, and the heat conducting sheet 364 is evenly distributed along the direction of the inner tube assembly 36 and the heat absorbing outer tube 31, so it will not affect the flow of smoke and liquid.

[0047] In a further embodiment, the support frame 41 is evenly distributed around the periphery of the heat-absorbing outer tube 31 and is connected to the heat-absorbing outer tube 31 through a connecting plate. The support frame 41 is used to support the recovery pipe mechanism 3. The upper and lower ends of the support frame 41 are fixedly connected with mounting rings 42. The mounting ring 42 is fixedly connected to the periphery of the chimney pipe 1, and the delivery pipe 43 is fixedly connected to the support frame 41.

[0048] In this embodiment, the delivery pipe 43 and the support frame 41 are fixedly connected via a connecting plate, so when the delivery pipe 43 vibrates, the support frame 41 will also vibrate.

[0049] In a further embodiment, a driving motor 47 is installed at one end of the delivery pipe 43, a vibration chamber 46 is opened inside the delivery pipe 43, a liquid guiding fan 48 is arranged inside the delivery pipe 43, an eccentric disk 49 is arranged inside the vibration chamber 46, and the liquid guiding fan 48 and the eccentric disk 49 are fixedly connected to the output shaft of the driving motor 47.

[0050] In this embodiment, a delivery chamber is provided inside the delivery tube 43 , and the chamber is connected to the first connection port 44 and the second connection port 45 .

[0051] The working principle of the present invention is as follows:

[0052] When the smoke generated by the burning objects in the external incineration chamber flows in the following order: it enters the interior of the inner smoke pipe 1 361 through the lower chimney pipe 1 and the connecting pipe 2, then enters the interior of the inner smoke pipe 2 362 through the connecting pipe 1 365 from the other end of the inner smoke pipe 1 361, then enters the interior of the inner smoke pipe 3 363 through the connecting pipe 2 366 at the other end of the inner smoke pipe 2 362, and finally is connected to the upper connecting pipe 2 and the chimney pipe 1 through the other end of the inner smoke pipe 3 363, and is discharged to the outside;

[0053] In this process, the flue gas passes through the inner smoke tube 1 361, the inner smoke tube 2 362 and the inner smoke tube 3 363 in sequence, and in the process, it will contact the heat conducting plates 364 evenly and equidistantly distributed on the outer peripheries of the inner smoke tube 1 361, the inner smoke tube 2 362 and the inner smoke tube 3 363, so that the liquid contained in the flue gas will be condensed and flow downward along the entire spiral of the inner tube assembly 36, and the liquid in the inner smoke tube 1 361 will flow to the inside of the liquid collecting outer tube 34 through the liquid outlet terminal 1 37, the liquid in the inner smoke tube 2 362 will flow to the inside of the liquid collecting outer tube 34 through the liquid outlet terminal 2 38, and the liquid in the inner smoke tube 3 363 will flow to the inside of the liquid collecting outer tube 34 through the liquid outlet terminal 3 39, so as to be collected;

[0054] When enough liquid is collected inside the liquid collecting outer tube 34, the liquid will enter the inside of the delivery tube 43 through the unidirectional connecting end 35. At this time, the driving motor 47 is operated through the external controller so that the liquid will enter the inside of the heat absorbing outer tube 31 through the delivery tube 43 and the liquid inlet end 33 in turn and be located on the periphery of the inner smoke tube 1 361, the inner smoke tube 2 362 and the inner smoke tube 3 363, and continue to accumulate. During the accumulation process, the liquid will contact the heat conducting sheet 364. Since one end of the heat conducting sheet 364 is plugged into the inner smoke tube 1 361, the inner smoke tube 2 362 and the inner smoke tube 3 363, it will conduct heat and heat the liquid in the heat absorbing outer tube 31. When the liquid in the heat absorbing outer tube 31 is accumulated, it can be released by opening the liquid discharge end 311 at the bottom of the heat absorbing outer tube 31 for use.

[0055] When the driving motor 47 is in operation, it will also drive the eccentric disk 49 to rotate inside the vibration chamber 46, thereby causing the conveying pipe 43 to vibrate, thereby causing the entire recovery pipe mechanism 3 to vibrate, thereby accelerating the condensed liquid in the inner smoke tube 1 361, the inner smoke tube 2 362 and the inner smoke tube 3 363 to flow to the inside of the liquid collecting outer tube 34.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery device for biomass power generation, comprising a chimney pipe (1) symmetrical in vertical direction, characterized in that: The chimney pipe (1) is used for exhausting smoke from a biomass power generation incineration chamber, a recovery pipe mechanism (3) is arranged between two chimney pipes (1), and a conveying mechanism (4) is arranged on the periphery of the recovery pipe mechanism (3); The recovery pipe mechanism (3) comprises a heat absorbing outer pipe (31), a liquid collecting outer pipe (34) and an inner pipe assembly (36); the inner pipe assembly (36) comprises an inner smoke pipe 1 (361), an inner smoke pipe 2 (362) and an inner smoke pipe 3 (363); the inner pipe assembly (36) is located inside the heat absorbing outer pipe (31); the inner pipe assembly (36) is used for flue gas to pass through; the inner pipe assembly (36) is also used for condensing liquid in the flue gas; the heat absorbing outer pipe (31) cooperates with the conveying mechanism (4) to collect the condensed liquid and absorb heat for recycling; The conveying mechanism (4) comprises a support frame (41) and a conveying pipe (43). The conveying pipe (43) is used to continuously convey the condensed liquid into the heat-absorbing outer pipe (31). The conveying pipe (43) cooperates with the support frame (41) to vibrate the recovery pipe mechanism (3) to accelerate the flow of the condensed liquid.

2. A waste heat recovery device for biomass power generation according to claim 1, characterized in that: The recovery pipe mechanism (3) is spiral-shaped, both ends of the inner pipe assembly (36) are connected to connecting pipes (2), the other ends of the connecting pipes (2) are connected to the chimney pipe (1), one end of the heat absorbing outer pipe (31) is provided with an exhaust terminal (32), the other end of the heat absorbing outer pipe (31) is provided with a liquid inlet terminal (33), and the end of the heat absorbing outer pipe (31) located at the liquid inlet terminal (33) is provided with a downwardly directed liquid discharge terminal (311), the delivery pipe (43) is provided with a connecting port 1 (44) and a connecting port 2 (45), and the liquid inlet terminal (33) is connected to the connecting port 1 (44).

3. The waste heat recovery device for biomass power generation according to claim 1, characterized in that: The liquid collecting outer tube (34) is fixedly connected to one end of the heat absorbing outer tube (31) and is close to the liquid inlet terminal (33). A connecting terminal (35) is provided at one end of the liquid collecting outer tube (34). The connecting terminal (35) is connected to the second connecting port (45). One end of the inner tube assembly (36) passes through the interior of the liquid collecting outer tube (34).

4. The waste heat recovery device for biomass power generation according to claim 1, characterized in that: The inner smoke tube one (361) is provided with a liquid outlet terminal one (37) at one end located inside the liquid collecting outer tube (34), the inner smoke tube two (362) is provided with a liquid outlet terminal two (38) at one end located inside the liquid collecting outer tube (34), and the inner smoke tube three (363) is provided with a liquid outlet terminal three (39) at one end located inside the liquid collecting outer tube (34).

5. The waste heat recovery device for biomass power generation according to claim 1, characterized in that: The two ends of the inner tube assembly (36) are respectively provided with a connecting tube 1 (365) and a connecting tube 2 (366); the connecting tube 1 (365) and the connecting tube 2 (366) are both located inside the connecting tube (2); the connecting tube 1 (365) connects the same end of the inner smoke tube 1 (361) and the inner smoke tube 2 (362); the connecting tube 2 (366) connects the same end of the inner smoke tube 2 (362) and the inner smoke tube 3 (363).

6. The waste heat recovery device for biomass power generation according to claim 1, characterized in that: The outer peripheries of the inner smoke tube one (361), the inner smoke tube two (362) and the inner smoke tube three (363) are all plugged with heat conducting plates (364) distributed at equal intervals, and a portion of the heat conducting plates (364) is located inside the heat absorbing outer tube (31).

7. The waste heat recovery device for biomass power generation according to claim 1, characterized in that: The support frame (41) is evenly distributed around the periphery of the heat absorbing outer tube (31) and is connected to the heat absorbing outer tube (31) via a connecting plate. The support frame (41) is used to support the recovery pipe mechanism (3). The upper and lower ends of the support frame (41) are fixedly connected with mounting rings (42). The mounting ring (42) is fixedly connected to the periphery of the chimney pipe (1). The delivery pipe (43) is fixedly connected to the support frame (41).

8. The waste heat recovery device for biomass power generation according to claim 1, characterized in that: A driving motor (47) is installed at one end of the delivery pipe (43); a vibration chamber (46) is provided inside the delivery pipe (43); a liquid-conducting rotary fan (48) is provided inside the delivery pipe (43); an eccentric disk (49) is provided inside the vibration chamber (46); and the liquid-conducting rotary fan (48) and the eccentric disk (49) are both fixedly connected to the output shaft of the driving motor (47).

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