A waste heat recovery system for carbonization equipment pyrolysis power generation

Abstract

This invention discloses a waste heat recovery system for pyrolysis power generation in carbonization equipment, including a pyrolysis carbonization system. The biomass feed end of the pyrolysis carbonization system is equipped with an automatic feeding system for biomass pyrolysis. The feed inlet of the automatic feeding system is fitted with a storage system for biomass storage. This waste heat recovery system facilitates heat exchange between the flue gas carrying waste heat and domestic water by setting up an inlet water pipe, connecting water pipe, heating water pipe, heat exchange channel, heat exchange teeth, and heat exchange box, thereby heating the domestic water to meet people's living needs. The system also features high heat exchange efficiency. Furthermore, the system includes a drive motor, conveyor housing, rotating conveyor blades, fixing holes, a first limiting ring, a dust filter bag, a cooling conveyor cylinder, a connecting collar, a rotating sleeve, and a rotating conveyor cylinder, which facilitates the screening of the discharged biomass char, separating and discharging powder and smaller particles from the biomass char.

Description

Technical Field

[0001] This invention relates to the field of carbonization equipment technology, specifically to a waste heat recovery system for carbonization equipment pyrolysis power generation. Background Technology

[0002] Biochar is a type of charcoal used as a soil conditioner. It helps plant growth and can be used in agriculture as well as for carbon collection and storage. Unlike traditional charcoal used for fuel, it can stimulate crop growth, improve acidic soil, increase fertilizer utilization, and protect soil microorganisms. It can also be used as a feed additive, filler material, and building material additive. Biochar is produced by converting biomass such as sawdust, nutshells, and branches into high-value-added biochar through low-temperature pyrolysis. However, existing biomass carbonization equipment cannot screen or cool the biochar while producing it, nor can it utilize the waste heat generated by biomass pyrolysis, which is quite wasteful of energy. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide a waste heat recovery system for pyrolysis power generation of carbonization equipment. It can screen and cool biomass char at the same time as carbon production, and can also utilize the waste heat generated by biomass pyrolysis, which saves energy and can effectively solve the problems in the background technology.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A waste heat recovery system for carbonization equipment pyrolysis power generation includes a pyrolysis carbonization system. An automatic feeding system for biomass pyrolysis is installed at the biomass feed inlet of the pyrolysis carbonization system. A storage system for biomass storage is installed in conjunction with the feed inlet of the automatic feeding system. A carbon discharge system is installed at the carbon discharge channel at the bottom of the pyrolysis carbonization system. A gas purification system is connected to the side of the pyrolysis carbonization system via a gas extraction system. The gas purification system is connected to a gas power generation system via a gas pipeline. An engine waste heat utilization system is installed on the upper surface of the gas power generation system.

[0006] As a preferred embodiment of the present invention, the carbon output system includes a conveyor housing installed at the bottom carbon output channel of the pyrolysis carbonization system. A rotating conveyor cylinder is rotatably connected inside the conveyor housing. Rotating conveyor blades are arranged on the circumference of the rotating conveyor cylinder. A drive motor located at the end of the conveyor housing is connected to the end of the rotating conveyor cylinder. A biomass char cooling and screening unit is installed on the rotating conveyor cylinder.

[0007] As a preferred embodiment of the present invention, the upper part of the circumference of the conveyor housing is provided with a biochar inlet that communicates with the bottom carbon outlet channel of the pyrolysis carbonization system, and the lower part of the circumference of the conveyor housing is provided with a biochar outlet.

[0008] As a preferred embodiment of the present invention, the biochar cooling and screening unit includes multiple fixing holes on the circumference of the rotating conveyor cylinder and a first limiting ring connected to the end of the rotating conveyor cylinder. The end of the rotating conveyor cylinder is rotatably connected to a rotating sleeve through the first limiting ring. The end of the rotating sleeve is connected to a cooling conveyor cylinder. An exhaust fan is installed on the upper part of the cooling conveyor cylinder, and a detachable dust filter bag is installed on the lower part of the cooling conveyor cylinder. A cooling component is provided on the circumference of the cooling conveyor cylinder.

[0009] As a preferred embodiment of the present invention, the bottom of the cooling conveying cylinder is provided with a second limiting ring, and the upper part of the dust filter bag is provided with a rubber band for cooperating with the second limiting ring.

[0010] As a preferred embodiment of the present invention, the cooling component includes a plurality of cooling slots formed inside the circumferential surface of the cooling conveying cylinder. At each end of the circumferential surface of the cooling conveying cylinder, a set of ventilation holes communicating with the plurality of cooling slots are provided. A connecting collar communicating with one of the sets of ventilation holes is connected to the circumferential surface of the cooling conveying cylinder. A blower is connected to the circumferential surface of the connecting collar through a duct.

[0011] As a preferred embodiment of the present invention, the gas purification system includes two gas purification cylinders, a purified gas delivery pipe is connected between the two gas purification cylinders, a gas ignition pipe is connected to the upper part of the purified gas delivery pipe, a first shielding cover is provided above the ignition port of the gas ignition pipe, and a gas valve is installed on the lower part of the circumference of the gas ignition pipe.

[0012] As a preferred embodiment of the present invention, the engine waste heat utilization system includes a heat exchange cylinder connected to the waste heat gas channel on the upper surface of the gas-fired power generation system. The inner cavity of the heat exchange cylinder is equipped with multiple heat exchange boxes. Multiple heating water pipes are connected between two heat exchange boxes in each layer. The heat exchange boxes in each layer are connected in series by connecting water pipes. One end of the top heat exchange box is connected to a drain pipe, and the other end of the bottom heat exchange box is connected to a water inlet pipe.

[0013] As a preferred embodiment of the present invention, the heating water pipe is provided with a plurality of heat exchange teeth on its circumference, and a heat exchange channel is formed between every two heat exchange teeth.

[0014] As a preferred embodiment of the present invention, the bottom of one end of the heat exchange cylinder is connected to an air inlet pipe that communicates with the waste heat gas channel on the upper surface of the gas power generation system, the upper part of the other end of the heat exchange cylinder is connected to an exhaust pipe, the top of the exhaust pipe is connected to a flue gas purification cylinder, the flue gas purification cylinder has a built-in filter core, and a second shielding cover is provided on the top of the flue gas purification cylinder.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] By incorporating an inlet pipe, connecting water pipe, heating water pipe, heat exchange channel, heat exchange plates, and heat exchange box, the system facilitates heat exchange between the flue gas carrying residual heat and domestic water, thereby heating the domestic water to meet people's living needs. The system also boasts high heat exchange efficiency. Furthermore, the inclusion of a drive motor, conveyor housing, rotating conveyor blades, fixing holes, a first limit ring, dust filter bag, cooling conveyor cylinder, connecting collar, rotating sleeve, and rotating conveyor cylinder facilitates the screening of the discharged biomass char, removing powder and smaller particles. Simultaneously, wind power is used to cool the biomass. A blower, connecting collar, cooling slots, and ventilation holes facilitate the cooling of the cooling conveyor cylinder, further accelerating heat exchange between the powder and smaller particles in the biomass char and the air, thus speeding up cooling. In summary, this system can screen and cool biomass char simultaneously during char production and can also utilize the residual heat generated from biomass pyrolysis, resulting in significant energy savings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the structure from another direction of the present invention.

[0019] Figure 3 This is a schematic diagram of the engine waste heat utilization system of the present invention.

[0020] Figure 4 This is a schematic diagram showing the internal structure of the engine waste heat utilization system of the present invention.

[0021] Figure 5 This is a schematic diagram of the carbon extraction system structure of the present invention.

[0022] Figure 6 This is a partial cross-sectional structural diagram of the cooling component of the present invention.

[0023] In the diagram: 1. Material storage system; 2. Automatic feeding system; 3. Purified gas transmission pipeline; 4. Gas ignition pipeline; 5. First shielding cover; 6. Flue gas purification cylinder; 7. Engine waste heat utilization system; 8. Gas power generation system; 9. Gas extraction system; 10. Gas purification system; 11. Gas valve; 12. Pyrolysis carbonization system; 13. Carbon discharge system; 14. Drive motor; 15. Conveyor housing; 16. Rotary conveyor blades; 17. Fixing hole; 18. First limit ring; 19. Blower; 10. Dust filter bag. 20. Cooling conveyor cylinder; 21. Connecting collar; 22. Rotating sleeve; 23. Rotating conveyor cylinder body; 24. Cooling slot hole; 25. Ventilation hole; 26. Second limiting ring; 27. Second shielding cover; 28. Exhaust fan; 29. ​​Smoke exhaust pipe; 30. Drainage pipe; 31. Air inlet pipe; 32. Water inlet pipe; 33. Connecting water pipe; 34. Heating water pipe; 35. Heat exchange channel; 36. Heat exchange toothed plate; 37. Heat exchange box body; 38. Biochar inlet; 39. Biochar outlet; 40. Heat exchange cylinder body; 41. Detailed Implementation

[0024] 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 embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Please see Figure 1-6 The present invention provides a technical solution:

[0026] A waste heat recovery system for pyrolysis power generation of carbonization equipment includes a pyrolysis carbonization system 12. An automatic feeding system 2 for biomass pyrolysis feeding is installed at the biomass raw material inlet of the pyrolysis carbonization system 12. A storage system 1 for biomass storage is installed in conjunction with the feeding port of the automatic feeding system 2. A carbon outlet system 13 is installed in conjunction with the carbon outlet channel at the bottom of the pyrolysis carbonization system 12. A gas purification system 10 is connected to the side of the pyrolysis carbonization system 12 through a gas extraction system 9. The gas purification system 10 is connected to a gas power generation system 8 through a gas pipeline. An engine waste heat utilization system 7 is installed on the upper surface of the gas power generation system 8.

[0027] The carbon output system 13 includes a conveyor housing 15 installed at the bottom carbon output channel of the pyrolysis carbonization system 12. A rotating conveyor cylinder 24 is rotatably connected inside the conveyor housing 15. Rotating conveyor blades 16 are arranged on the circumference of the rotating conveyor cylinder 24. A drive motor 14 located at the end of the conveyor housing 15 is connected to the end of the rotating conveyor cylinder 24. A biomass char cooling and screening unit is installed on the rotating conveyor cylinder 24.

[0028] A biochar inlet 39, which is connected to the bottom carbon outlet channel of the pyrolysis carbonization system 12, is provided on the upper part of the circumference of the conveyor housing 15, and a biochar outlet 40 is provided on the lower part of the circumference of the conveyor housing 15.

[0029] The biochar cooling and screening unit includes multiple fixing holes 17 on the circumference of the rotating conveying cylinder 24 and a first limiting ring 18 connected to the end of the rotating conveying cylinder 24. The end of the rotating conveying cylinder 24 is rotatably connected to a rotating sleeve 23 through the first limiting ring 18. The end of the rotating sleeve 23 is connected to a cooling conveying cylinder 21. An exhaust fan 29 is installed on the upper part of the cooling conveying cylinder 21, and a detachable dust filter bag 20 is installed on the lower part of the cooling conveying cylinder 21. Cooling components are provided on the circumference of the cooling conveying cylinder 21.

[0030] The first limiting ring 18 and the rotating sleeve 23 are used to rotatably connect the cooling conveying cylinder 21 to the bottom of the rotating conveying cylinder 24. The exhaust fan 29 provides air power and uses multiple fixing holes 17 on the circumference of the rotating conveying cylinder 24 to screen out the powder and small particles in the biochar. At the same time, the accelerated air flow is used to reduce the temperature of the biochar. The powder and fine particles enter the dust filter bag 20 along the cooling conveying cylinder 21 for centralized processing.

[0031] The bottom of the cooling conveyor cylinder 21 is provided with a second limiting ring 27, and the upper part of the dust filter bag 20 is provided with a rubber band for cooperating with the second limiting ring 27. The dust filter bag 20 can be easily disassembled and assembled by cooperating with the second limiting ring 27 and the rubber band.

[0032] The cooling component includes multiple cooling slots 25 formed inside the circumference of the cooling conveyor cylinder 21. At each end of the circumference of the cooling conveyor cylinder 21, there is a set of ventilation holes 26 that connect the multiple cooling slots 25. The circumference of the cooling conveyor cylinder 21 is connected to a connecting collar 22 that communicates with one of the ventilation holes 26. The circumference of the connecting collar 22 is connected to a blower 19 through a duct. The blower 19, in conjunction with the connecting collar 22, facilitates the airflow within the multiple cooling slots 25, rapidly reducing the temperature of the cooling conveyor cylinder 21, thereby promoting heat exchange of the powder and fine particles and facilitating rapid cooling of the powder and fine particles.

[0033] The gas purification system 10 includes two gas purification cylinders, and a purified gas delivery pipe 3 is connected between the two gas purification cylinders. A gas ignition pipe 4 is connected to the upper part of the purified gas delivery pipe 3. A first shielding cover 5 is provided above the ignition port of the gas ignition pipe 4. A gas valve 11 is installed on the lower part of the circumference of the gas ignition pipe 4. The gas valve 11 controls the flow of gas in the gas ignition pipe 4. The gas can be ignited through the ignition port at the top of the gas ignition pipe 4.

[0034] The engine waste heat utilization system 7 includes a heat exchange cylinder 41 connected to the waste heat gas channel on the upper surface of the gas power generation system 8. The inner cavity of the heat exchange cylinder 41 is equipped with multiple heat exchange boxes 38. Multiple heating water pipes 35 are connected between two heat exchange boxes 38 in each layer. Each layer of heat exchange boxes 38 is connected in series by connecting water pipes 34. One end of the top heat exchange box 38 is connected to a drain pipe 31, and the other end of the bottom heat exchange box 38 is connected to a water inlet pipe 33. The multi-layer structure of heating water pipes 35 and heat exchange boxes 38 facilitates sufficient heat exchange between domestic water and waste heat gas, accelerating the heating of domestic water to meet people's production and living needs.

[0035] The heating water pipe 35 is provided with multiple heat exchange plates 37 on its circumference. A heat exchange channel 36 is formed between every two heat exchange plates 37. The heat exchange area of ​​the drainage pipe 31 can be expanded by using multiple heat exchange plates 37 and heat exchange channels 36.

[0036] The bottom of one end of the heat exchange cylinder 41 is connected to an air inlet pipe 32 that communicates with the waste heat gas channel on the upper surface of the gas power generation system 8. The upper part of the other end of the heat exchange cylinder 41 is connected to an exhaust pipe 30. The top of the exhaust pipe 30 is connected to a flue gas purification cylinder 6. The flue gas purification cylinder 6 has a filter core inside. A second shielding cover 28 is provided above the flue gas purification cylinder 6.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A carbonization plant pyrolysis electricity generation waste heat recovery system comprising a pyrolysis carbonization system (12) characterized by: The biomass feed end of the pyrolysis carbonization system (12) is equipped with an automatic feeding system (2) for biomass pyrolysis feeding. The feed port of the automatic feeding system (2) is equipped with a storage system (1) for biomass storage. The carbon outlet channel at the bottom of the pyrolysis carbonization system (12) is equipped with a carbon outlet system (13). The side of the pyrolysis carbonization system (12) is connected to a gas purification system (10) through a gas extraction system (9). The gas purification system (10) is connected to a gas power generation system (8) through a gas pipeline. The upper surface of the gas power generation system (8) is equipped with an engine waste heat utilization system (7). The carbon output system (13) includes a conveyor housing (15) installed at the bottom carbon output channel of the pyrolysis carbonization system (12). A rotating conveyor cylinder (24) is rotatably connected inside the conveyor housing (15). Rotating conveyor blades (16) are arranged on the circumference of the rotating conveyor cylinder (24). A drive motor (14) located at the end of the conveyor housing (15) is connected to the end of the rotating conveyor cylinder (24). A biomass char cooling and screening unit is installed on the rotating conveyor cylinder (24). The upper part of the conveyor housing (15) is provided with a biochar inlet (39) that communicates with the bottom carbon outlet channel of the pyrolysis carbonization system (12), and the lower part of the conveyor housing (15) is provided with a biochar outlet (40). The biochar cooling and screening unit includes multiple fixing holes (17) on the circumference of the rotating conveying cylinder (24) and a first limiting ring (18) connected to the end of the rotating conveying cylinder (24). The end of the rotating conveying cylinder (24) is rotatably connected to a rotating sleeve (23) through the first limiting ring (18). The end of the rotating sleeve (23) is connected to a cooling conveying cylinder (21). A fan (29) is installed on the upper part of the cooling conveying cylinder (21). A detachable dust filter bag (20) is installed on the lower part of the cooling conveying cylinder (21). A cooling component is provided on the circumference of the cooling conveying cylinder (21). The bottom of the cooling conveyor cylinder (21) is provided with a second limiting ring (27), and the upper part of the dust filter bag (20) is provided with a rubber band for cooperating with the second limiting ring (27); The cooling assembly includes multiple cooling slots (25) formed inside the periphery of the cooling conveying cylinder (21). At each end of the periphery of the cooling conveying cylinder (21), a set of ventilation holes (26) communicating with the multiple cooling slots (25) are provided. A connecting collar (22) communicating with one of the ventilation holes (26) is connected to the periphery of the cooling conveying cylinder (21). A blower (19) is connected to the periphery of the connecting collar (22) through a duct.

2. The waste heat recovery system for carbonization equipment pyrolysis power generation according to claim 1, characterized in that: The gas purification system (10) includes two gas purification cylinders, and a purified gas delivery pipe (3) is connected between the two gas purification cylinders. A gas test pipe (4) is connected to the upper part of the purified gas delivery pipe (3). A first shielding cover (5) is provided above the test port of the gas test pipe (4). A gas valve (11) is installed on the lower part of the periphery of the gas test pipe (4).

3. The waste heat recovery system for carbonization equipment pyrolysis power generation according to claim 1, characterized in that: The engine waste heat utilization system (7) includes a heat exchange cylinder (41) connected to the waste heat gas channel on the upper surface of the gas power generation system (8). The inner cavity of the heat exchange cylinder (41) is equipped with multiple heat exchange boxes (38). Multiple heating water pipes (35) are connected between the two heat exchange boxes (38) in each layer. The heat exchange boxes (38) in each layer are connected in series by connecting water pipes (34). One end of the heat exchange box (38) at the top layer is connected to a drain pipe (31), and the other end of the heat exchange box (38) at the bottom layer is connected to a water inlet pipe (33).

4. The waste heat recovery system for carbonization equipment pyrolysis power generation according to claim 3, characterized in that: The heating water pipe (35) is provided with a plurality of heat exchange teeth (37) on its circumference, and a heat exchange channel (36) is formed between every two heat exchange teeth (37).

5. The waste heat recovery system for carbonization equipment pyrolysis power generation according to claim 3, characterized in that: The bottom of one end of the heat exchange cylinder (41) is connected to an air inlet pipe (32) that communicates with the waste heat gas channel on the upper surface of the gas power generation system (8). The upper part of the other end of the heat exchange cylinder (41) is connected to a flue gas pipe (30). The top of the flue gas pipe (30) is connected to a flue gas purification cylinder (6). The flue gas purification cylinder (6) has a filter core inside. A second shielding cover (28) is provided above the flue gas purification cylinder (6).

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