A device for cooling biomass pyrolysis gas and simultaneously removing high boiling point products

Abstract

The present invention relates to the technical field of pyrolysis and carbonization of biomass raw materials, and discloses a device for cooling biomass pyrolysis gas and removing high-boiling-point products simultaneously, wherein the device for cooling biomass pyrolysis gas and removing high-boiling-point products simultaneously comprises a first evaporator, a second evaporator, a third evaporator, a condenser, a temperature monitor, a wood vinegar collection tank, and a high-boiling-point product collection pool. The present invention performs contact heat exchange between the high-temperature flue gas discharged from the pyrolysis and carbonization of biomass and the condensed wood vinegar, thereby achieving the effect of secondary evaporation of the wood vinegar. At the same time, the difference in volatility of each component in the liquid mixture is utilized to separate the high-boiling-point and low-boiling-point products. Secondly, the series design of the three evaporators allows the wood vinegar to be evaporated and concentrated multiple times, and finally obtains a high-concentration high-boiling-point product and a relatively pure wood vinegar, respectively.

Description

Technical Field

[0001] The invention relates to the technical field of pyrolysis and carbonization of biomass raw materials, and more specifically, to a device for cooling biomass pyrolysis gas and simultaneously removing high boiling point products. Background Art

[0002] Pyrolysis gas is one of the main products of biomass pyrolysis carbonization. It is rich in combustible gas components such as CO, H2 and CH4 and can be directly used as fuel or chemical raw materials. Pyrolysis gas also contains by-products such as organic acids, phenols, alcohols, ketones, etc., which also have application value.

[0003] At present, traditional heat exchange methods such as washing or cooling are mainly used to remove or recover by-products in pyrolysis gas. The collected liquid is generally called wood vinegar, which has multiple functions such as sterilization, antibacterial, deodorization, insect repellent and plant growth promotion. However, the wood vinegar obtained by the existing technology has complex ingredients and contains a large amount of high-boiling phenolic substances with certain toxicity. Among them, secondary refining technologies such as membrane, evaporation and extraction have been proven to be able to remove these high-boiling products well. However, these methods require large investments in initial equipment investment, operation and maintenance, and energy consumption, making popularization and application more difficult.

[0004] Therefore, the existing pyrolysis gas cooling method leads to complex wood vinegar composition, high water content and difficulty in secondary refining, which seriously limits the development and utilization of pyrolysis gas by-products. It is urgent to develop a device for cooling biomass pyrolysis gas and removing high boiling point products simultaneously. Summary of the invention

[0005] The present invention provides a device for cooling biomass pyrolysis gas and simultaneously removing high-boiling-point products, which solves the technical problem in the related art that the existing pyrolysis gas cooling method leads to complex wood vinegar composition, high water content and great difficulty in secondary refining, which seriously limits the development and utilization of pyrolysis gas by-products.

[0006] The present invention provides a device for cooling biomass pyrolysis gas and removing high-boiling-point products simultaneously, comprising a first evaporator, a second evaporator, a third evaporator, a condenser, a temperature monitor, a wood vinegar collection tank and a high-boiling-point product collection pool, wherein a high-temperature pyrolysis gas inlet is installed on the first evaporator, and the high-temperature pyrolysis gas inlet is connected to a high-temperature pyrolysis gas source pipeline, an aeration disk is installed inside the first evaporator, the second evaporator, the third evaporator and the condenser, and a purified pyrolysis gas outlet is installed on the condenser;

[0007] The condenser is provided with a cooling coil inside, and the condenser is provided with a second cooling water inlet and a second cooling water outlet, the second cooling water inlet is connected to one end of the cooling coil, and the second cooling water outlet is connected to the other end of the cooling coil;

[0008] A low-boiling-point product discharge pipe is installed at the bottom of the condenser, and the low-boiling-point product discharge pipe is connected to the inside of the wood vinegar collection tank. The first evaporator, the second evaporator, the third evaporator, the wood vinegar collection tank and the high-boiling-point product collection tank are all connected through a wood vinegar reflux pipeline. A circulating pump is installed on the wood vinegar reflux pipeline between the third evaporator and the wood vinegar collection tank. A high-boiling-point product discharge valve is also installed between the bottom of the first evaporator and the high-boiling-point product collection tank.

[0009] As a further optimization solution of the present invention, the temperature monitor is installed above the interior of the third evaporator, and the installation position of the temperature monitor is in the center of the gas phase above the interior of the third evaporator.

[0010] As a further optimization scheme of the present invention, the aeration plate in the first evaporator is connected to the high-temperature pyrolysis gas inlet, the first evaporator is connected to the aeration plate in the second evaporator through the pyrolysis gas pipeline, the second evaporator is connected to the aeration plate in the third evaporator through the pyrolysis gas pipeline, and the third evaporator is connected to the aeration plate in the condenser through the pyrolysis gas pipeline.

[0011] As a further optimization scheme of the present invention, the outsides of the first evaporator, the second evaporator and the third evaporator are all installed with interlayer water jackets, and the interlayer water jackets are connected by cooling water pipelines. The interlayer water jacket on the first evaporator is installed with a first cooling water inlet, and the interlayer water jacket on the third evaporator is installed with a first cooling water outlet.

[0012] As a further optimization solution of the present invention, the surrounding height of the interlayer water jacket is lower than the height of the liquid level line in the evaporator.

[0013] As a further optimization scheme of the present invention, interference components are provided inside the first evaporator, the second evaporator and the third evaporator, and the interference components are arranged directly above the aeration disk, which can fully interfere with the high-temperature pyrolysis gas released in the aeration disk, thereby improving the evaporation efficiency of the wood vinegar.

[0014] As a further optimization scheme of the present invention, the interference component includes a connecting frame arranged inside the first evaporator, the second evaporator and the third evaporator, and partitions are installed on both sides of the outer wall of the connecting frame, and dispersion plates are provided on both sides of the partition, and a plurality of dispersion holes are opened in the dispersion plate.

[0015] As a further optimization scheme of the present invention, a screw sleeve is installed inside the connecting frame, and a reciprocating screw is arranged inside the screw sleeve, both ends of the reciprocating screw are rotatably connected to the supporting frames through bearings, and a limiting rod is installed between the two groups of supporting frames, and limiting grooves are provided on both sides of the connecting frame, and the limiting grooves are located outside the limiting rods.

[0016] As a further optimization scheme of the present invention, the first evaporator, the second evaporator and the third evaporator are all rotatably connected with connecting shafts through bearings, and the connecting shafts are fixedly connected to one group of the supporting frames. The first evaporator, the second evaporator and the third evaporator are all equipped with motors, and a first gear is installed at the output shaft of the motor. The first gear is meshed with a second gear, and the second gear is installed on the connecting shaft. A third gear is also installed at the output shaft of the motor, and a fourth gear is meshed with the third gear, and the fourth gear is installed on the reciprocating screw.

[0017] As a further optimization scheme of the present invention, the bearings on both sides of the limit groove are connected with a rotating shaft, and the rotating shaft is fixedly connected to the dispersion plate. A fifth gear is also installed on the rotating shaft, and the fifth gears are meshingly connected. A group of rack plates are installed on the limit rod at intervals, and the rack plates are meshingly connected to the fifth gear.

[0018] The beneficial effects of the present invention are:

[0019] 1. The present invention conducts contact heat exchange between the high-temperature flue gas discharged from the pyrolysis and carbonization of biomass and the condensed wood vinegar, thereby achieving the effect of secondary evaporation of the wood vinegar. At the same time, the difference in volatility of each component in the liquid mixture is utilized to separate the high-boiling point and low-boiling point products. Secondly, the series design of the three evaporators allows the wood vinegar to be evaporated and concentrated multiple times, and finally obtains a high-concentration high-boiling point product and a relatively pure wood vinegar, respectively.

[0020] 2. The present invention designs the two condensation systems of the interlayer water jacket and the condenser separately, which can independently control the cooling temperature of the high and low boiling point condensates, which is beneficial to better separation of the two.

[0021] 3. The present invention utilizes the high-grade heat energy carried by the pyrolysis gas itself to evaporate the wood vinegar, which can make rational use of waste heat resources and has a significant energy-saving and emission-reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the positional relationship between the interference component and the evaporator of the present invention;

[0024] Figure 3 It is a schematic diagram of the three-dimensional structure of the interference component of the present invention;

[0025] Figure 4 The present invention Figure 3 A magnified view of the structure at center;

[0026] Figure 5The present invention Figure 2 Partial structural section view;

[0027] Figure 6 It is a schematic diagram of the local three-dimensional structure of the interference component of the present invention;

[0028] Figure 7 is a partial three-dimensional structural cross-sectional view of the connecting frame and the partition of the present invention;

[0029] Figure 8 It is a schematic diagram of the structural change of the working state of the present invention.

[0030] In the figure: 1, first evaporator; 2, second evaporator; 3, third evaporator; 4, condenser; 5, high temperature pyrolysis gas inlet; 6, aeration plate; 7, pyrolysis gas pipeline; 8, purified pyrolysis gas outlet; 9, first cooling water inlet; 10, interlayer water jacket; 11, cooling water pipeline; 12, first cooling water outlet; 13, second cooling water inlet; 14, cooling coil; 15, second cooling water outlet; 16, low boiling point product discharge pipe; 17, circulation pump; 18, wood vinegar reflux pipeline; 19, high boiling point product discharge valve; 20, liquid level view Observation window; 21. Temperature monitor; 22. Wood vinegar collection tank; 23. High boiling point product collection pool; 24. Connecting frame; 25. Partition; 26. Dispersion plate; 27. Dispersion hole; 28. Screw sleeve; 29. ​​Reciprocating screw; 30. Carrying frame; 31. Connecting shaft; 32. Limit rod; 33. Motor; 34. First gear; 35. Second gear; 36. Third gear; 37. Fourth gear; 38. Limit groove; 39. Rotating shaft; 40. Fifth gear; 41. Rack plate; 42. Knife holder; 43. Scraper; 44. Electric push rod. DETAILED DESCRIPTION

[0031] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0032] Example 1: Please refer to the attached Figure 1 A device for cooling biomass pyrolysis gas and removing high-boiling-point products simultaneously comprises a first evaporator 1, a second evaporator 2, a third evaporator 3, a condenser 4, a temperature monitor 21, a wood vinegar collection tank 22 and a high-boiling-point product collection pool 23. The first evaporator 1 is provided with a high-temperature pyrolysis gas inlet 5, and is connected to a high-temperature pyrolysis gas source pipeline through the high-temperature pyrolysis gas inlet 5. The condenser 4 is provided with a purified pyrolysis gas outlet 8.

[0033] Specifically, the temperature monitor 21 is installed above the inside of the third evaporator 3, and the installation position of the temperature monitor 21 is in the gas phase above the inside of the third evaporator 3. A low boiling point product discharge pipe 16 is installed at the bottom of the condenser 4, and the low boiling point product discharge pipe 16 is connected to the inside of the wood vinegar collection tank 22.

[0034] The first evaporator 1, the second evaporator 2, the third evaporator 3 and the condenser 4 are provided with an aeration plate 6. The aeration plate 6 in the first evaporator 1 is connected to the high-temperature pyrolysis gas inlet 5; the first evaporator 1 is connected to the aeration plate 6 in the second evaporator 2 through the pyrolysis gas pipeline 7; the second evaporator 2 is connected to the aeration plate 6 in the third evaporator 3 through the pyrolysis gas pipeline 7; the third evaporator 3 is connected to the aeration plate 6 in the condenser 4 through the pyrolysis gas pipeline 7.

[0035] It should be noted that the first evaporator 1, the second evaporator 2, the third evaporator 3, the wood vinegar collection tank 22 and the high boiling point product collection tank 23 are all connected through the wood vinegar reflux pipeline 18, and a circulating pump 17 is installed on the wood vinegar reflux pipeline 18 between the third evaporator 3 and the wood vinegar collection tank 22, which is used to replenish liquid in the first evaporator 1, the second evaporator 2 and the third evaporator 3. A high boiling point product discharge valve 19 is also installed between the bottom of the first evaporator 1 and the high boiling point product collection tank 23. Among them, the reflux direction of the wood vinegar is opposite to the flow direction of the pyrolysis gas.

[0036] Specifically, the first evaporator 1, the second evaporator 2 and the third evaporator 3 are connected in sequence according to the flow direction of the pyrolysis gas. The first evaporator 1, the second evaporator 2 and the third evaporator 3 adopt a pointed bottom cylindrical structure, and the height-to-diameter ratio of the cylindrical part is preferably greater than 2.

[0037] It should be understood that when the pyrolysis gas enters from the high-temperature pyrolysis gas inlet 5, the pyrolysis gas first enters from the bottom of the first evaporator 1, then is discharged from the top thereof, enters the bottom of the second evaporator 2 through the pyrolysis gas pipeline 7, and then passes through the third evaporator 3 in the same manner, and enters the bottom of the condenser 4 through the pyrolysis gas pipeline 7. In this embodiment, by utilizing the aeration disk 6 located in the first evaporator 1, the second evaporator 2, and the third evaporator 3, the pyrolysis gas is released into the solution inside the first evaporator 1, the second evaporator 2, and the third evaporator 3 through the aeration disk 6. In this embodiment, the liquid level height inside the first evaporator 1, the second evaporator 2, and the third evaporator 3 is preferably between 2 / 3 and 3 / 4.

[0038] Furthermore, the first evaporator 1, the second evaporator 2 and the third evaporator 3 are all equipped with an interlayer water jacket 10 on the outside, and the interlayer water jackets 10 are connected through a cooling water pipeline 11. The interlayer water jacket 10 on the first evaporator 1 is equipped with a first cooling water inlet 9, and the interlayer water jacket 10 on the third evaporator 3 is equipped with a first cooling water outlet 12. The surrounding height of the interlayer water jacket 10 is lower than the height of the liquid level line in the evaporator. When the cooling water enters from the first cooling water inlet 9, it is discharged into the interlayer water jackets 10 on the first evaporator 1, the second evaporator 2 and the third evaporator 3 in turn, and finally, it is discharged to the water storage tank through the first cooling water outlet 12.

[0039] Furthermore, the condenser 4 is located after the third evaporator 3, that is, in the next process, and the condenser 4 is preferably a partition heat exchanger. A cooling coil 14 is provided inside the condenser 4, and a second cooling water inlet 13 and a second cooling water outlet 15 are installed on the condenser 4. The second cooling water inlet 13 is connected to one end of the cooling coil 14, and the second cooling water outlet 15 is connected to the other end of the cooling coil 14.

[0040] It should be noted that the first evaporator 1, the second evaporator 2 and the third evaporator 3 are all equipped with liquid level observation windows 20, which are located at the internal liquid level lines of the first evaporator 1, the second evaporator 2 and the third evaporator 3, so as to observe the liquid level conditions.

[0041] Working principle: The first evaporator 1, the second evaporator 2 and the third evaporator 3 have the effect of evaporating and concentrating the refluxed wood vinegar liquid for multiple times, and finally achieve the goal of separating the high boiling point product from the low boiling point product.

[0042] Preparation before system startup: First, close the high boiling point product discharge valve 19, and then inject the collected wood vinegar (which can be replaced by tap water) into the third evaporator 3 through the wood vinegar circulation pump 17 until the liquid levels in the first evaporator 1, the second evaporator 2 and the third evaporator 3 reach the liquid level observation window 20.

[0043] System startup: High-temperature pyrolysis gas enters from the air inlet, passes through the aeration plate 6 into the interior of the first evaporator 1, and uses the high-temperature pyrolysis gas itself to heat the liquid in the first evaporator 1. When the liquid in the first evaporator 1 is heated to the boiling point, rapid evaporation will occur, and the generated steam will enter the second evaporator 2 along with the pyrolysis gas through the pyrolysis gas pipeline 7, and then heat the liquid in the second evaporator 2. Similarly, when the liquid in the third evaporator 3 is heated to boiling, a large amount of generated steam will enter the condenser 4 along with the pyrolysis gas for cooling and recovery of wood vinegar.

[0044] System operation control: When the temperature reading of the temperature monitor 21 reaches 60°C, open the valves of the second cooling water inlet 13 and the second cooling water outlet 15. When the temperature reading of the temperature monitor 21 reaches 99°C, open the valves of the first cooling water inlet 9 and the first cooling water outlet 12, and control the temperature reading of the temperature monitor 21 between 99-110°C by adjusting the cooling water flow rate. Subsequently, turn on the wood vinegar reflux pump and adjust the wood vinegar reflux rate to stabilize the liquid level inside the evaporator. Finally, regularly open and close the high boiling point product discharge valve 19 to discharge the high boiling point product concentrate in the first evaporator 1 into the high boiling point product collection pool 23.

[0045] Example 2: Please refer to the attached Figure 2 , Attachment Figure 3 and attached Figure 6 The first evaporator 1, the second evaporator 2 and the third evaporator 3 are all provided with interference components for interfering with the high-temperature pyrolysis gas released from the aeration disk 6, so that the high-temperature pyrolysis gas can be fully contacted with the wood vinegar liquid to evaporate the wood vinegar liquid. In addition, the interference component is arranged directly above the aeration disk 6, and can fully interfere with the high-temperature pyrolysis gas released from the aeration disk 6, thereby improving the evaporation efficiency of the wood vinegar liquid.

[0046] Specifically, the interference component includes a connecting frame 24 arranged inside the first evaporator 1, the second evaporator 2 and the third evaporator 3, and partitions 25 are installed on both sides of the outer wall of the connecting frame 24, and dispersion plates 26 are provided on both sides of the partition 25, and a plurality of dispersion holes 27 are opened in the dispersion plate 26.

[0047] It should be understood that when the high-temperature pyrolysis gas is released from the aeration plate 6, the aerated high-temperature pyrolysis gas contacts the wood vinegar liquid, passes through the dispersion holes 27 in the liquid, and interferes with the travel of the high-temperature pyrolysis gas, thereby increasing the contact area between the wood vinegar liquid and the high-temperature pyrolysis gas, and improving the heat exchange efficiency between the wood vinegar liquid and the high-temperature pyrolysis gas, thereby accelerating the evaporation process. In addition, by interfering with the high-temperature pyrolysis gas, the heat distribution can be made more uniform, thereby reducing the situation of local overheating.

[0048] Please see attached Figure 2 , Attachment Figure 3 , Attachment Figure 4 and attached Figure 5, a lead screw sleeve 28 is installed inside the connecting frame 24, and a reciprocating lead screw 29 is arranged inside the lead screw sleeve 28, both ends of the reciprocating lead screw 29 are rotatably connected to a carrier frame 30 through bearings, and a limit rod 32 is installed between the two sets of carrier frames 30, and both sides of the connecting frame 24 are provided with a limit groove 38, and the limit groove 38 is located outside the limit rod 32. When the reciprocating lead screw 29 rotates, the lead screw sleeve is driven to slide back and forth outside the reciprocating lead screw 29, and the connecting frame 24 is limited by the limit groove 38 and the limit rod 32, so that the lead screw sleeve 28 maintains vertical up and down reciprocating motion.

[0049] Among them, the first evaporator 1, the second evaporator 2 and the third evaporator 3 are all rotatably connected with a connecting shaft 31 through a bearing, and the connecting shaft 31 is fixedly connected to one group of carrier frames 30, and the first evaporator 1, the second evaporator 2 and the third evaporator 3 are all installed with a motor 33, and a first gear 34 is installed at the output shaft of the motor 33, the first gear 34 is meshed with a second gear 35, and the second gear 35 is installed on the connecting shaft 31, and a third gear 36 is also installed at the output shaft of the motor 33, and the third gear 36 is meshed with a fourth gear 37, and the fourth gear 37 is installed on the reciprocating screw 29.

[0050] It should be noted that when the driving motor 33 rotates, the motor 33 drives the first gear 34 and the third gear 36 to rotate, and the first gear 34 is meshed with the second gear 35, and the third gear 36 is meshed with the fourth gear 37, thereby driving the support frame 30 and the reciprocating screw 29 to rotate respectively, that is, the connecting frame 24 can rotate circumferentially while moving up and down, so that the dispersion plate 26 moves up and down and rotates, thereby disturbing the liquid inside the first evaporator 1, the second evaporator 2 and the third evaporator 3.

[0051] For further information, please see the attached Figure 4 , Attachment Figure 5 , Attachment Figure 6 and attached Figure 7 , the bearings on both sides of the limiting groove 38 are connected with a rotating shaft 39, and the rotating shaft 39 is fixedly connected to the dispersion plate 26, and the rotating shaft 39 is also installed with a fifth gear 40, and the fifth gears 40 are meshed, and a set of rack plates 41 are installed on the limiting rod 32 at intervals, and the rack plates 41 are meshed with the fifth gears 40, so that the rotating shaft 39 can be controlled to rotate. Among them, a torsion spring can also be installed outside the rotating shaft 39, and one end of the torsion spring is fixedly connected to the limiting groove 38, and the other end is fixedly connected to the fifth gear 40. When the meshing connection between the fifth gear 40 and the rack plate 41 is released, the dispersion plate 26 is reset, so that the fifth gear 40 is meshed with the rack plate 41 again, driving the dispersion plate 26 to rotate.

[0052] It should be noted that when the connecting frame 24 moves up and down, the rack plate 41 is meshed and connected with the fifth gear 40, thereby controlling the dispersion plate 26 to rotate up and down. The fifth gear 40 is continuously meshed and connected with the rack plate 41, so that the dispersion plate 26 rotates, so that the dispersion plate 26 can not only disturb the high-temperature pyrolysis gas, but also stir the liquid inside the first evaporator 1, the second evaporator 2 and the third evaporator 3, thereby accelerating the evaporation rate.

[0053] For further information, please see the attached Figure 5 , Attachment Figure 6 and attached Figure 7 , a knife holder 42 is slidably connected to one end of the partition 25 away from the connecting frame 24, and a scraper 43 is installed in the knife holder 42. An electric push rod 44 is installed on the partition 25, and the telescopic end of the electric push rod 44 is fixedly connected to the knife holder 42. When the connecting frame 24 performs circumferential motion, the partition 25 is driven to rotate synchronously, so that the scraper 43 can spirally rotate around the inner walls of the first evaporator 1, the second evaporator 2, and the third evaporator 3, so that when the electric push rod 44 pushes the scraper 43 to fit the inner walls of the first evaporator 1, the second evaporator 2, and the third evaporator 3, the inner walls of the first evaporator 1, the second evaporator 2, and the third evaporator 3 are spirally scraped to remove scale.

[0054] An example of the present specific implementation mode is described above, but the present embodiment is not limited to the above-mentioned specific implementation mode, which is merely illustrative and not restrictive. A person skilled in the art may make many forms inspired by the present embodiment, all of which are protected by the present embodiment.

Claims

1. A device for cooling biomass pyrolysis gas and removing high boiling point products simultaneously, characterized in that: The invention comprises a first evaporator (1), a second evaporator (2), a third evaporator (3), a condenser (4), a temperature monitor (21), a wood vinegar collection tank (22) and a high boiling point product collection pool (23); the first evaporator (1) is provided with a high temperature pyrolysis gas inlet (5) and is connected to a high temperature pyrolysis gas source pipeline through the high temperature pyrolysis gas inlet (5); an aeration disk (6) is installed inside the first evaporator (1), the second evaporator (2), the third evaporator (3) and the condenser (4); and the condenser (4) is provided with a purified pyrolysis gas outlet (8); The condenser (4) is provided with a cooling coil (14) inside, and the condenser (4) is provided with a second cooling water inlet (13) and a second cooling water outlet (15), the second cooling water inlet (13) is connected to one end of the cooling coil (14), and the second cooling water outlet (15) is connected to the other end of the cooling coil (14); A low boiling point product discharge pipe (16) is installed at the bottom of the condenser (4), and the low boiling point product discharge pipe (16) is connected to the inside of the wood vinegar collection tank (22); the first evaporator (1), the second evaporator (2), the third evaporator (3), the wood vinegar collection tank (22) and the high boiling point product collection tank (23) are all connected through a wood vinegar reflux pipeline (18); a circulation pump (17) is installed on the wood vinegar reflux pipeline (18) between the third evaporator (3) and the wood vinegar collection tank (22); and a high boiling point product discharge valve (19) is also installed between the bottom of the first evaporator (1) and the high boiling point product collection tank (23).

2. The device for cooling biomass pyrolysis gas and removing high boiling point products according to claim 1, characterized in that: The temperature monitor (21) is installed above the interior of the third evaporator (3), and the installation position of the temperature monitor (21) is located in the center of the gas phase above the interior of the third evaporator (3).

3. The device for cooling biomass pyrolysis gas and removing high boiling point products according to claim 1, characterized in that: The aeration disk (6) in the first evaporator (1) is connected to the high-temperature pyrolysis gas inlet (5); the first evaporator (1) is connected to the aeration disk (6) in the second evaporator (2) via the pyrolysis gas pipeline (7); the second evaporator (2) is connected to the aeration disk (6) in the third evaporator (3) via the pyrolysis gas pipeline (7); and the third evaporator (3) is connected to the aeration disk (6) in the condenser (4) via the pyrolysis gas pipeline (7).

4. The device for cooling biomass pyrolysis gas and removing high boiling point products simultaneously according to claim 1 is characterized in that: The first evaporator (1), the second evaporator (2) and the third evaporator (3) are all provided with interlayer water jackets (10) on the outside; the interlayer water jackets (10) are connected to each other via cooling water pipelines (11); the interlayer water jacket (10) on the first evaporator (1) is provided with a first cooling water inlet (9); and the interlayer water jacket (10) on the third evaporator (3) is provided with a first cooling water outlet (12).

5. The device for cooling biomass pyrolysis gas and removing high boiling point products simultaneously according to claim 4, characterized in that: The surrounding height of the interlayer water jacket (10) is lower than the height of the liquid level line in the evaporator.

6. The device for cooling biomass pyrolysis gas and removing high boiling point products simultaneously according to claim 1, characterized in that: The first evaporator (1), the second evaporator (2) and the third evaporator (3) are all provided with interference components inside, and the interference components are arranged directly above the aeration plate (6), so as to fully interfere with the high-temperature pyrolysis gas released from the aeration plate (6), thereby improving the evaporation efficiency of the wood vinegar.

7. The device for cooling biomass pyrolysis gas and removing high boiling point products simultaneously according to claim 6, characterized in that: The interference component comprises a connecting frame (24) arranged inside the first evaporator (1), the second evaporator (2) and the third evaporator (3), and partitions (25) are installed on both sides of the outer wall of the connecting frame (24), and dispersion plates (26) are arranged on both sides of the partition (25), and a plurality of dispersion holes (27) are opened in the dispersion plate (26).

8. The device for cooling biomass pyrolysis gas and removing high boiling point products simultaneously according to claim 7, characterized in that: A screw sleeve (28) is installed inside the connecting frame (24), and a reciprocating screw (29) is arranged inside the screw sleeve (28). Both ends of the reciprocating screw (29) are rotatably connected to a supporting frame (30) through bearings, and a limiting rod (32) is installed between the two groups of supporting frames (30). Both sides of the connecting frame (24) are provided with limiting grooves (38), and the limiting grooves (38) are located outside the limiting rods (32).

9. The device for cooling biomass pyrolysis gas and removing high boiling point products simultaneously according to claim 8, characterized in that: The first evaporator (1), the second evaporator (2) and the third evaporator (3) are all rotatably connected to a connecting shaft (31) via a bearing, and the connecting shaft (31) is fixedly connected to one of the groups of the supporting frames (30). The first evaporator (1), the second evaporator (2) and the third evaporator (3) are all installed with a motor (33), and a first gear (34) is installed at the output shaft of the motor (33), a second gear (35) is meshedly connected to the first gear (34), and the second gear (35) is installed on the connecting shaft (31), and a third gear (36) is also installed at the output shaft of the motor (33), and a fourth gear (37) is meshedly connected to the third gear (36), and the fourth gear (37) is installed on the reciprocating screw (29).

10. The device for cooling biomass pyrolysis gas and removing high boiling point products simultaneously according to claim 8, characterized in that: The bearings on both sides of the limiting groove (38) are connected with a rotating shaft (39), and the rotating shaft (39) is fixedly connected to the dispersion plate (26). A fifth gear (40) is also installed on the rotating shaft (39), and the fifth gears (40) are meshingly connected. A group of rack plates (41) are installed on the limiting rod (32) at intervals, and the rack plates (41) are meshingly connected to the fifth gear (40).

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