Device for producing steam by utilizing biomass carbonization tail gas

Abstract

The invention relates to the technical field of biomass carbonization, in particular to a device for producing steam by utilizing biomass carbonization tail gas, which comprises a carbonization box and a steam assembly, the steam assembly comprises an evaporation box arranged on one side of the carbonization box, and an air suction piece is arranged between a combustion box and the carbonization box; the mixing assembly comprises a first rotating ring rotationally mounted in the evaporation box, a mixing plate is rotationally mounted on the first rotating ring, and the rotating directions of the first rotating ring and the mixing plate are opposite; the carbonization box is connected with a discharging machine, a connecting pipe is connected between the discharging machine and the evaporation box, and an auxiliary heat exchange assembly is arranged between the connecting pipe and the discharging machine. Water flow is introduced into the discharging machine and exchanges heat with materials in the discharging machine, waste heat recovery is completed, then steam is produced through combustion of gas generated through carbonization, the energy utilization rate is increased, a mixing assembly is arranged in the evaporation box, rapid mixing of internal liquid is completed through the water flow, and the energy utilization rate is increased. And the heat exchange efficiency and quality are further improved.

Description

Technical Field

[0001] This invention relates to the field of biomass carbonization technology, specifically to a device for generating steam from biomass carbonization tail gas. Background Technology

[0002] Biomass carbonization refers to the process by which biomass is pyrolyzed at high temperatures of 250℃-750℃ under conditions of limited oxygen supply or complete oxygen deficiency to produce solid coke, wood vinegar and biomass combustible gas. The technical classification includes low-temperature slow pyrolysis (700℃).

[0003] Existing biomass carbonization equipment generates a lot of combustible gases during operation. These gases are generally burned on-site, and the flue gas contains a lot of heat. Some manufacturers recover the flue gas and preheat the air before combustion, but this is not efficient and results in some waste. Secondly, the carbonized material also contains a lot of heat when it is discharged, and the current practice is to discharge it directly, which leads to the waste of thermal energy. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a device for generating steam from biomass carbonization tail gas, which can effectively solve the problem of insufficient utilization of waste heat after material carbonization and gas waste heat in the existing technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides an apparatus for generating steam from biomass carbonization tail gas, comprising a carbonization box and a feeder for conveying materials, and further comprising: The steam assembly includes an evaporation box located on one side of the carbonization box, and a combustion box located outside the evaporation box. An air suction device is provided between the combustion box and the carbonization box. When the feeder is started, the air suction device draws gas from the carbonization box and delivers it to the combustion box. The mixing assembly includes a first rotating ring rotatably mounted in an evaporator, a plurality of water distribution pipes connected to the first rotating ring, and a mixing plate rotatably mounted on the first rotating ring. When water enters the evaporator, both the first rotating ring and the mixing plate will rotate, and the first rotating ring and the mixing plate will rotate in opposite directions. The carbonization box is connected to a discharge machine, and a connecting pipe connects the discharge machine and the evaporation box. An auxiliary heat exchange assembly is provided between the connecting pipe and the discharge machine. Furthermore, a first motor for driving its rotation is provided on one side of the feeding machine, and a feeding rack is provided on the top of the feeding machine.

[0006] Furthermore, the carbonization box is equipped with a heating box, and the air intake component includes a fixed pipe disposed below the heating box. The inner wall of the fixed pipe is provided with a first reciprocating threaded groove, and a turntable is slidably adapted in the first reciprocating threaded groove. A piston tube is fixedly installed in the fixed pipe, and a piston rod is movably inserted in the piston tube. The piston rod and the turntable are rotatably connected. A telescopic rod is fixedly installed at the end of the turntable away from the piston rod, and a transmission component is provided between the telescopic rod and the first motor.

[0007] Furthermore, the transmission component includes a transmission box mounted on one side of the first motor, the output shaft of the first motor rotatably passes through the outer wall of the transmission box, a rotating rod is fixedly connected to the end of the telescopic rod, the rotating rod rotatably passes through the inner wall of the transmission box, a first transmission disc is provided on the output shaft of the first motor, a second transmission disc is provided on the rotating rod, and a transmission belt is provided between the first transmission disc and the second transmission disc.

[0008] Furthermore, an intake pipe is connected between the piston tube and the carbonization box, a flow divider is provided at the bottom of the combustion box, and an exhaust pipe is connected between the flow divider and the piston tube.

[0009] Furthermore, a filter box is provided on the exhaust pipe, and multiple filter plates are provided in the filter box. Multiple exhaust pipes are provided on the top wall of the evaporator.

[0010] Furthermore, the auxiliary heat exchange assembly includes a screw rod rotatably disposed in the discharge machine, and a heat exchange hole is provided in the shaft of the screw rod. The two ends of the screw rod are respectively rotatably connected to a first buffer box and a second buffer box, and the second buffer box and the connecting pipe are fixedly connected.

[0011] Furthermore, the first buffer box is fixedly connected to the water inlet pipe, and a water pump is connected to the outside of the water inlet pipe. The discharge machine is equipped with a third motor for driving the screw rod to rotate.

[0012] Furthermore, a third buffer tank is provided on one side of the evaporator, and the connecting pipe is connected to the third buffer tank. The mixing assembly also includes multiple water distribution pipes fixed on the first rotating ring. The water distribution pipes are provided with multiple water outlets and are connected to the third buffer tank. A second rotating ring is rotatably installed on the inner ring of the first rotating ring, and a water wheel is rotatably installed in the second rotating ring. The water wheel and the mixing plate are fixedly connected.

[0013] Furthermore, each of the water distribution pipes is slidably mounted with a sliding frame, a one-way plate is rotatably mounted on the sliding frame, and a baffle is provided on the sliding frame.

[0014] Furthermore, the inner wall of the evaporator is provided with a second reciprocating threaded groove, and multiple sliding frames are slidably installed in the second reciprocating threaded groove.

[0015] Furthermore, the feeding frame is equipped with a crushing blade holder, and a second motor for driving the crushing blade holder to rotate is provided on one side of the feeding frame.

[0016] The technical solution provided by this invention has the following advantages compared with the known prior art: By introducing water into the discharge machine to exchange heat with the material in the discharge machine, waste heat is recovered. Then, the combustion of the gas generated by carbonization is used to produce steam, which improves the energy utilization rate. Secondly, a mixing component is set in the evaporator to use water flow to quickly mix the internal liquids, further improving the efficiency and quality of heat exchange. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0018] Figure 1 This is an overall schematic diagram of the present invention; Figure 2 This is a schematic diagram of the piston tube section; Figure 3 This is a structural diagram of the discharge machine section; Figure 4 for Figure 3 Sectional view; Figure 5 This is a schematic diagram of the internal structure of the evaporator. Figure 6 for Figure 5 The front view; Figure 7 This is a structural diagram of the water distribution pipe section; Figure 8 This is a structural schematic diagram of the one-way panel section; Figure 9 This is a schematic diagram showing the rotation direction of the water distribution pipe and the water wheel.

[0019] The labels in the diagram represent: 1. Carbonization box; 2. Heating box; 3. Feeder; 4. First motor; 5. Feeding rack; 6. Second motor; 7. Discharge machine; 8. Evaporation box; 9. Combustion box; 10. Exhaust pipe; 11. Intake pipe; 12. Filter box; 13. Diverter pipe; 14. Rotating rod; 15. Telescopic rod; 16. Turntable; 17. Piston tube; 18. Piston rod; 19. Exhaust pipe; 20. Transmission box; 21. Water inlet pipe; 22. Connecting pipe; 23. First buffer box; 24. Second buffer box; 25. Heat exchange hole; 26. Third buffer box; 27. First rotating ring; 28. Water distribution pipe; 29. ​​Sliding frame; 30. One-way plate; 31. Second rotating ring; 32. Water wheel; 33. Mixing plate; 34. Baffle. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] The present invention will be further described below with reference to embodiments.

[0022] Example 1: refer to Figure 1 A device for generating steam from biomass carbonization tail gas includes a carbonization box 1 and a feeder 3 for conveying materials. A first motor 4 for driving the feeder 3 to rotate is provided on one side of the feeder 3. A feeder frame 5 is provided on the top of the feeder 3. A crushing blade holder is provided in the feeder frame 5. A second motor 6 for driving the crushing blade holder to rotate is provided on one side of the feeder frame 5.

[0023] To make fuller use of the combustible gas generated during carbonization, a steam assembly is installed on one side of the carbonization box 1, including an evaporator 8 located on one side of the carbonization box 1, and a combustion box 9 located outside the evaporator 8. A suction component is installed between the combustion box 9 and the carbonization box 1. When the feeder 3 is started, the suction component draws gas from the carbonization box 1 and delivers it to the combustion box 9. A heating box 2 is installed on the carbonization box 1. The suction component includes a fixed pipe located below the heating box 2. The inner wall of the fixed pipe has a first reciprocating threaded groove, in which a turntable 16 is slidably fitted. A piston pipe 17 is fixedly installed in the fixed pipe. A suction pipe 11 connects the piston pipe 17 and the carbonization box 1. A diversion pipe 13 is located at the bottom of the combustion box 9, and an outlet pipe 19 connects the diversion pipe 13 and the piston pipe 17. A filter box 12 is provided on the exhaust pipe 19, and multiple filter plates are provided in the filter box 12. Multiple exhaust pipes 10 are provided on the top wall of the evaporator 8. A piston rod 18 is movably inserted into the piston tube 17. The piston rod 18 and the turntable 16 are rotatably connected. A telescopic rod 15 is fixedly installed at the end of the turntable 16 away from the piston rod 18. A transmission component is provided between the telescopic rod 15 and the first motor 4. The transmission component includes a transmission box 20 installed on one side of the first motor 4. The output shaft of the first motor 4 rotatably passes through the outer wall of the transmission box 20. A rotating rod 14 is fixedly connected to the end of the telescopic rod 15. The rotating rod 14 rotatably passes through the inner wall of the transmission box 20. A first transmission disc is provided on the output shaft of the first motor 4. A second transmission disc is provided on the rotating rod 14. A transmission belt is provided between the first transmission disc and the second transmission disc.

[0024] like Figure 1 As shown, the first motor 4 is used to transport external materials to the carbonization box 1. In order to improve the carbonization efficiency, a crushing blade is set at the bottom of the feeding rack 5 to crush the materials to a certain extent, which can improve the carbonization efficiency.

[0025] Subsequently, the rotating rod 14 is rotated by the transmission disc in the transmission box 20. The rotation speed of the rotating rod 14 can be controlled by the transmission ratio between the first transmission disc and the second transmission disc. The rotating rod 14 drives the telescopic rod 15 and the turntable 16 to rotate. When the turntable 16 rotates, it slides along the first reciprocating thread groove (not shown in the figure) inside the fixed tube, so that the turntable 16 makes reciprocating linear motion in the fixed tube (its principle is the same as that of the nut and the reciprocating screw), thereby driving the piston rod 18 to move reciprocally in the piston tube 17.

[0026] As the piston rod 18 moves into the piston tube 17, the combustible gas extracted from inside is transported to the combustion chamber 9. During this process, the combustible gas passes through a filter box 12. Because the combustible gas produced by carbonization is mixed with some carbon ash and other impurities, filtration can prevent the generation of pollutants such as black smoke during combustion.

[0027] As the piston rod 18 moves outward from the piston tube 17, the combustible gas in the carbonization box 1 is drawn out using the suction pipe 11. Both the suction pipe 11 and the outlet pipe 19 are equipped with one-way valves.

[0028] Example 2: refer to Figure 7 The mixing assembly includes a first rotating ring 27 rotatably mounted in the evaporator 8, with multiple water distribution pipes 28 connected to the first rotating ring 27. A mixing plate 33 is rotatably mounted on the first rotating ring 27. When water enters the evaporator 8, both the first rotating ring 27 and the mixing plate 33 rotate in opposite directions. The mixing assembly also includes multiple water distribution pipes 28 fixed to the first rotating ring 27, each with multiple water outlets. Its inlet is located in the third buffer tank 26. In the middle, the water distribution pipe 28 and the third buffer box 26 are connected. The second rotating ring 31 is rotatably installed on the inner ring of the first rotating ring 27. The water wheel 32 is rotatably installed in the second rotating ring 31. The water wheel 32 and the mixing plate 33 are fixedly connected. A sliding frame 29 is slidably installed on each water distribution pipe 28. A one-way plate 30 is rotatably installed on the sliding frame 29. A baffle 34 is provided on the sliding frame 29. The inner wall of the evaporator 8 is provided with a second reciprocating thread groove. Multiple sliding frames 29 are slidably installed in the second reciprocating thread groove.

[0029] like Figure 5 and Figure 6 As shown, water first enters the third buffer tank 26. It is worth noting that the diameter of the connecting pipe 22 is relatively large. The water flow into the third buffer tank 26 is divided into two parts and flows into the evaporator 8. One part enters the water distribution pipe 28 and then is discharged from the outlet of the water distribution pipe 28. As shown in the figure, the outlet is located on the side of the water distribution pipe 28. Under the reaction force of the water jet, the water distribution pipe 28 will drive the first rotating ring 27 to rotate, which not only makes the water outlet unfixed, but also completes the mixing of the internal water.

[0030] During the rotation of the water distribution pipe 28, the sliding frame 29 and the one-way plate 30 will rotate together. The sliding frame 29 slides along the second reciprocating thread groove and slides back and forth. The state of the one-way plate 30 is different depending on the sliding direction. When the one-way plate 30 is away from the first rotating ring 27, it will be blocked by the baffle 34 and will not rotate. Therefore, the water can be pushed away from the first rotating ring 27. When the one-way plate 30 is close to the first rotating ring 27, it will not be blocked by the baffle 34 and will be rotated by the resistance of the water. That is, it will not push the water flow. In this way, the water at both ends of the evaporator 8 can be switched, which further improves the efficiency of heat exchange and evaporation and improves the energy utilization rate.

[0031] Another portion of the water enters the evaporator 8 through the second rotating ring 31. As it passes through, it drives the water wheel 32 to rotate, which in turn drives the mixing plate 33 at the center to rotate. The direction of rotation of the mixing plate 33 is opposite to that of the water distribution pipe 28, which further improves the degree of mixing and increases the efficiency of heat exchange and evaporation.

[0032] refer to Figure 3 and Figure 4 A carbonization box 1 is connected to a discharge machine 7. A connecting pipe 22 connects the discharge machine 7 and the evaporation box 8. An auxiliary heat exchange assembly is provided between the connecting pipe 22 and the discharge machine 7. The auxiliary heat exchange assembly includes a screw rod rotatably installed in the discharge machine 7. A heat exchange hole 25 is opened in the shaft of the screw rod. The two ends of the screw rod are respectively rotatably connected to a first buffer box 23 and a second buffer box 24. The second buffer box 24 is fixedly connected to the connecting pipe 22. The first buffer box 23 is fixedly connected to a water inlet pipe 21. A water pump is connected to the outside of the water inlet pipe 21. A third motor for driving the screw rod to rotate is provided outside the discharge machine 7. A third buffer box 26 is provided on one side of the evaporation box 8. The connecting pipe 22 and the third buffer box 26 are connected.

[0033] The first buffer tank 23 and the second buffer tank 24 are both rotatably connected to the screw rod. Specifically, the rotatable connection can be made using sealed bearings to prevent water leakage. This ensures that while the screw rod is rotating to transport materials, water will also flow through it. Since the screw rod is made of heat-conducting material, the heat of the material can be transferred to the water flow. This waste heat absorption preheats the water flow before evaporation, which not only improves the utilization rate of waste heat but also improves the efficiency and quality of subsequent evaporation.

[0034] It is worth noting that, regarding the specific driving method of the screw rod inside the discharge machine 7, a gear or transmission disc can be fitted onto the outer end of the screw rod, and the third motor is also equipped with a gear or transmission disc, which can be driven by gear transmission or belt transmission.

[0035] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for generating steam from biomass carbonization tail gas, comprising a carbonization box and a feeder for conveying materials, characterized in that, Also includes: The steam assembly includes an evaporation box located on one side of the carbonization box, and a combustion box located outside the evaporation box. An air suction device is provided between the combustion box and the carbonization box. When the feeder is started, the air suction device draws gas from the carbonization box and delivers it to the combustion box. The mixing assembly includes a first rotating ring rotatably mounted in an evaporator, a plurality of water distribution pipes connected to the first rotating ring, and a mixing plate rotatably mounted on the first rotating ring. When water enters the evaporator, both the first rotating ring and the mixing plate will rotate, and the first rotating ring and the mixing plate will rotate in opposite directions. The carbonization box is connected to a discharge machine, and a connecting pipe connects the discharge machine and the evaporation box. An auxiliary heat exchange assembly is provided between the connecting pipe and the discharge machine.

2. The apparatus for generating steam from biomass carbonization tail gas according to claim 1, characterized in that, The feeding machine is equipped with a first motor on one side for driving its rotation, and a feeding rack is provided on the top of the feeding machine.

3. The apparatus for generating steam from biomass carbonization tail gas according to claim 1, characterized in that, The carbonization box is equipped with a heating box. The air intake component includes a fixed pipe located below the heating box. The inner wall of the fixed pipe is provided with a first reciprocating threaded groove. A turntable is slidably adapted in the first reciprocating threaded groove. A piston tube is fixedly installed in the fixed pipe. A piston rod is movably inserted in the piston tube. The piston rod and the turntable are rotatably connected. A telescopic rod is fixedly installed at the end of the turntable away from the piston rod. A transmission component is provided between the telescopic rod and the first motor.

4. The apparatus for generating steam from biomass carbonization tail gas according to claim 3, characterized in that, The transmission component includes a transmission box mounted on one side of the first motor. The output shaft of the first motor rotatably passes through the outer wall of the transmission box. A rotating rod is fixedly connected to the end of the telescopic rod. The rotating rod rotatably passes through the inner wall of the transmission box. A first transmission disc is provided on the output shaft of the first motor. A second transmission disc is provided on the rotating rod. A transmission belt is provided between the first transmission disc and the second transmission disc.

5. The apparatus for generating steam from biomass carbonization tail gas according to claim 3, characterized in that, An intake pipe is connected between the piston tube and the carbonization box, and a flow divider is provided at the bottom of the combustion box. An exhaust pipe is connected between the flow divider and the piston tube.

6. The apparatus for generating steam from biomass carbonization tail gas according to claim 5, characterized in that, The exhaust pipe is equipped with a filter box, which contains multiple filter plates, and the top wall of the evaporator is equipped with multiple exhaust pipes.

7. The apparatus for generating steam from biomass carbonization tail gas according to claim 1, characterized in that, The auxiliary heat exchange assembly includes a screw rod rotatably disposed in the discharge machine, and a heat exchange hole is provided in the shaft of the screw rod. The two ends of the screw rod are respectively rotatably connected to a first buffer box and a second buffer box, and the second buffer box and the connecting pipe are fixedly connected.

8. The apparatus for generating steam from biomass carbonization tail gas according to claim 1, characterized in that, The first buffer box is fixedly connected to the water inlet pipe, and a water pump is connected to the outside of the water inlet pipe. The discharge machine is equipped with a third motor for driving the screw rod to rotate.

9. The apparatus for generating steam from biomass carbonization tail gas according to claim 1, characterized in that, A third buffer tank is provided on one side of the evaporator, and the connecting pipe is connected to the third buffer tank. The mixing assembly also includes multiple water distribution pipes fixed on the first rotating ring. The water distribution pipes are provided with multiple water outlets and are connected to the third buffer tank. A second rotating ring is rotatably installed on the inner ring of the first rotating ring, and a water wheel is rotatably installed in the second rotating ring. The water wheel and the mixing plate are fixedly connected.

10. The apparatus for generating steam from biomass carbonization tail gas according to claim 9, characterized in that, Each of the water distribution pipes is slidably mounted with a sliding frame, a one-way plate is rotatably mounted on the sliding frame, and a baffle is provided on the sliding frame.

11. The apparatus for generating steam from biomass carbonization tail gas according to claim 10, characterized in that, The inner wall of the evaporator is provided with a second reciprocating threaded groove, and multiple sliding frames are slidably installed in the second reciprocating threaded groove.

12. The apparatus for generating steam from biomass carbonization tail gas according to claim 2, characterized in that, The feeding rack is equipped with a crushing blade holder, and a second motor for driving the crushing blade holder to rotate is provided on one side of the feeding rack.

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