Rotary bed high volatile coal pyrolysis device

Abstract

The utility model relates to coal pyrolysis equipment technical field discloses a kind of rotary bed high volatile coal pyrolysis device, including pyrolysis furnace main unit, the upper end of pyrolysis furnace main unit is connected with feeding unit, the lower end of pyrolysis furnace main unit is provided with discharge port, and discharge port is installed with discharge auger, the upper end of pyrolysis furnace main unit is connected with heat source import, the inside upper side of pyrolysis furnace main unit is provided with gas collection unit;Pyrolysis furnace main unit includes furnace shell and the rotary bed assembly of being installed in the inside of furnace shell, the upper side of rotary bed assembly is provided with thickness adjusting assembly;Feeding unit includes feed bin and the distributor connected in the lower side of feed bin, feeding bin is provided with feeding auger;Gas collection unit includes gas collection cover shell and the steam exhaust passage of being opened in gas collection cover shell;Solved the problem of volatile fraction escape control difficult, pyrolysis uniformity is insufficient and device continuous operation ability is poor in prior art.

Description

Technical Field

[0001] This utility model relates to the technical field of coal pyrolysis equipment, specifically to a rotary bed high volatile coal pyrolysis device. Background Technology

[0002] Coal pyrolysis technology is one of the important ways to utilize coal cleanly and efficiently. Through medium- and low-temperature pyrolysis, high-volatile coal can be converted into high-value-added products such as semi-coke, coal tar, and pyrolysis gas, realizing the graded conversion and comprehensive utilization of coal. Currently, common coal pyrolysis equipment includes fixed-bed, fluidized-bed, and rotary kilns, but these devices still have several technical bottlenecks when processing high-volatile coal.

[0003] High-volatile coals release volatiles rapidly and produce large amounts of gas during pyrolysis. If these gases are not removed in time, they can cause pressure fluctuations, gas retention, and even secondary cracking within the furnace, reducing tar quality and potentially leading to coking and blockage. Furthermore, in traditional static beds, uneven heating of the material can easily result in localized overheating or incomplete pyrolysis, affecting the quality and yield of semi-coke. Fixed-bed equipment, in particular, suffers from long loading and unloading cycles, making large-scale continuous production difficult and impacting overall energy efficiency and economics.

[0004] Therefore, there is an urgent need for a coal pyrolysis device suitable for high-volatile coals, capable of achieving uniform pyrolysis, efficient gas collection, and continuous and stable operation. This invention addresses these problems by proposing a rotating bed pyrolysis device with a reasonable structure, flexible operation, and high pyrolysis efficiency. Utility Model Content

[0005] To address the problems in the prior art, this invention provides a rotary bed high volatile coal pyrolysis device, which is achieved through the following technical solution.

[0006] A rotating bed high volatile coal pyrolysis device includes a pyrolysis furnace main unit. The upper end of the pyrolysis furnace main unit is connected to a feeding unit, and a main drive shaft is installed on the feeding unit. The lower end of the pyrolysis furnace main unit is provided with a discharge port, and a discharge auger is installed in the discharge port. The pyrolysis furnace main unit is connected to a heat source inlet, and a gas collection unit is provided on the upper side of the interior of the pyrolysis furnace main unit. The main unit of the pyrolysis furnace includes a furnace shell and a rotating bed assembly installed inside the furnace shell. A thickness adjustment component is provided on the upper side of the rotating bed assembly, and a cooling zone is provided on the lower side of the rotating bed assembly. The feeding unit includes a feeding bin and a material distributor connected to the lower side of the feeding bin, and a feeding auger is provided in the feeding bin; The gas collection unit includes a gas collection hood housing and a gas exhaust channel opened in the gas collection hood housing, and a gas exhaust pipe is provided in the gas exhaust channel.

[0007] As a preferred embodiment of the present invention, the rotary bed assembly includes a rotary bed surface and a discharge port connected to the lower end of the rotary bed surface, and a discharge auger is provided inside the discharge port, and a hot air distribution chamber is provided on the lower side of the rotary bed surface.

[0008] As a preferred embodiment of this utility model, the rotating bed surface is provided with air vents evenly distributed, and the hot gas distribution chamber is connected to the heat source inlet.

[0009] As a preferred embodiment of the present invention, the thickness adjustment component includes a scraper and a porous exhaust plate connected to the lower end of the scraper, and a lifting adjustment plate is connected to the upper end of the scraper.

[0010] As a preferred embodiment of this utility model, the porous exhaust plate is provided with exhaust holes evenly distributed.

[0011] In a preferred embodiment of this utility model, the scraper and the lifting adjustment plate are fixedly connected, wherein the lifting adjustment plate is fixedly installed inside the gas collecting hood housing, so that the scraper can move up and down on the gas collecting hood housing.

[0012] In a preferred embodiment of this utility model, the main drive shaft is disposed through the pyrolysis furnace main body unit and the feeding unit, and the main drive shaft is fixedly connected to the feeding auger, the unloading auger and the discharge auger.

[0013] This utility model has the following beneficial effects: 1. By setting up a rotatable rotating bed assembly and an adjustable thickness adjustment assembly above it, dynamic leveling and thickness control of coal are achieved during the pyrolysis process, which effectively improves the uniformity of pyrolysis and avoids local overheating or incomplete pyrolysis. At the same time, the main drive shaft runs through and drives multiple key components to operate synchronously, realizing continuous operation of feeding, pyrolysis, cooling and discharging, which significantly improves the processing capacity and stability of the device and is suitable for large-scale pyrolysis production of high volatile coal.

[0014] 2. By utilizing the evenly spaced ventilation valves on the rotating bed and the exhaust holes on the porous exhaust plate, combined with the gas collection structure in the gas collection unit, the rapid export and centralized collection of pyrolysis gases are achieved, reducing gas retention and secondary reactions, and improving tar quality and gas recovery rate. Attached Figure Description

[0015] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 : A schematic diagram of the overall structure of this utility model; Figure 2 : A frontal sectional view of the present invention; Figure 3 : A schematic diagram of the overall cross-sectional structure of this utility model; Figure 4 : A cross-sectional structural diagram of the rotary bed assembly in this utility model; Figure 5 : A cross-sectional structural diagram of the thickness adjustment component in this utility model.

[0017] The attached figures are labeled as follows: 10. Main body unit of pyrolysis furnace; 11. Outer shell of furnace body; 12. Rotary bed assembly; 121. Rotary bed surface; 122. Feed port; 123. Feed auger; 124. Hot gas distribution chamber; 13. Thickness adjustment assembly; 131. Scraper; 132. Perforated exhaust plate; 133. Lifting adjustment plate; 14. Cooling zone; 20. Feeding unit; 21. Feeding hopper; 22. Distributor; 23. Feeding auger; 30. Main drive shaft; 40. Discharge port; 41. Discharge auger; 50. Heat source import; 60. Gas collection unit; 61. Gas collection hood housing; 62. Exhaust passage; 63. Exhaust pipe. Detailed Implementation

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

[0019] Example 1 Reference Figures 1-5 As shown, this is the first embodiment of the present invention, which provides a rotary bed high volatile coal pyrolysis device, including a pyrolysis furnace main body unit 10, a feeding unit 20 connected to the upper end of the pyrolysis furnace main body unit 10, and a main drive shaft 30 installed on the feeding unit 20, a discharge port 40 provided at the lower end of the pyrolysis furnace main body unit 10, and a discharge auger 41 installed in the discharge port 40, a heat source inlet 50 connected to the pyrolysis furnace main body unit 10, and a gas collection unit 60 provided on the upper side inside the pyrolysis furnace main body unit 10; In this process, coal enters the pyrolysis furnace main unit 10 through the feeding unit 20, and undergoes pyrolysis and cooling in the pyrolysis furnace main unit 10, and is finally discharged through the discharge port 40; the heat source inlet 50 serves as the heat source, and the gas collection unit 60 rapidly collects and discharges the gas generated during the pyrolysis process.

[0020] The pyrolysis furnace main unit 10 includes a furnace shell 11 and a rotating bed assembly 12 installed inside the furnace shell 11. A thickness adjustment component 13 is provided on the upper side of the rotating bed assembly 12, and a cooling zone 14 is provided on the lower side of the rotating bed assembly 12. The rotating bed assembly 12 and the thickness adjustment component 13 cooperate to ensure that the coal thickness on the rotating bed assembly 12 is uniform, which facilitates pyrolysis. After pyrolysis, the semi-coke and other products are cooled in the cooling zone 14 and discharged through the discharge port 40 after cooling.

[0021] The feeding unit 20 includes a feeding bin 21 and a distributor 22 connected to the lower side of the feeding bin 21. A feeding auger 23 is provided in the feeding bin 21. The feeding bin 21 is fixedly connected to the upper end of the furnace shell 11. The feeding auger 23 is located in the feeding bin 21 to feed coal. At the same time, the distributor 22 is located on the lower side of the feeding auger 23 to evenly distribute the coal, ensuring that the coal is evenly distributed when it enters the rotary bed assembly 12. During the feeding process, the coal is first dried before reaching the rotary bed assembly 12.

[0022] The gas collection unit 60 includes a gas collection hood housing 61 and a steam exhaust channel 62 opened in the gas collection hood housing 61, and a steam exhaust pipe 63 is provided in the steam exhaust channel 62; wherein, the gas collection hood housing 61 is fixedly connected to the upper inside of the furnace shell 11, the steam exhaust channel 62 is opened in the gas collection hood housing 61, and the steam exhaust pipe 63 is used to discharge the gas generated during the coal pyrolysis process in a timely manner, thereby improving the pyrolysis efficiency.

[0023] The rotating bed assembly 12 includes a rotating bed surface 121 and a feed port 122 connected to the lower end of the rotating bed surface 121. A feed auger 123 is provided inside the feed port 122. A hot gas distribution chamber 124 is provided on the lower side of the rotating bed surface 121. Ventilation valves are evenly distributed on the rotating bed surface 121. The hot gas distribution chamber 124 is connected to the heat source inlet 50. The heat source enters the hot gas distribution chamber 124 through the heat source inlet 50 and pyrolyzes the coal on the rotating bed surface 121 through the ventilation valves. Furthermore, the hot gas distribution chamber 124 is fixedly connected to the inside of the furnace shell 11. The rotating bed surface 121 is installed on the hot gas distribution chamber 124 with limited rotation, and the two are sealed together. Furthermore, the rotating bed surface 121 is fixedly connected to the main drive shaft 30, so that the main drive shaft 30 drives the rotating bed surface 121 to rotate synchronously when it rotates. At the same time, the rotating bed surface 121 is a conical shape with a high outer edge and a low inner edge, and its inner edge is connected to the discharge port 122 to facilitate material discharge.

[0024] The thickness adjustment assembly 13 includes a scraper 131 and a porous exhaust plate 132 connected to the lower end of the scraper 131, and a lifting adjustment plate 133 is connected to the upper end of the scraper 131; wherein, exhaust holes are evenly arranged on the porous exhaust plate 132; the scraper 131 and the lifting adjustment plate 133 are fixedly connected, wherein the lifting adjustment plate 133 is fixedly installed inside the gas collection hood housing 61, so that the scraper 131 can move up and down on the gas collection hood housing 61; Furthermore, the main drive shaft 30 is installed through the pyrolysis furnace main body unit 10 and the feeding unit 20, and the main drive shaft 30 is fixedly connected to the feeding auger 23, the unloading auger 123 and the discharge auger 41.

[0025] Specifically, the material is transported by the feeding auger 23 in the feeding hopper 21 and evenly conveyed to the rotating bed assembly 12 area within the pyrolysis furnace main unit 10 via the distributor 22. The main drive shaft 30, as the core drive component, passes through the pyrolysis furnace main unit 10 and the feeding unit 20 and is fixedly connected to the feeding auger 23, the discharge auger 123, and the discharge auger 41. Driven by an external power source, it can drive the rotating bed assembly 12 and the discharge auger 41 to operate synchronously. The rotating bed assembly 12 includes a rotating bed surface 121 and a discharge port 122 connected to its lower end. The discharge auger 123 inside the discharge port 122 is fixed to the main drive shaft 30, so that when the main drive shaft 30 rotates, it can drive the rotating bed surface 121 and the discharge port 122 to rotate as a whole, thereby achieving stirring and turning of the internal coal material and ensuring uniform heating of the material. The evenly spaced ventilation valves on the rotating bed surface 121 facilitate the flow of gases generated during pyrolysis and allow heat to penetrate the material more effectively. A thickness adjustment assembly 13 is located on the upper side of the rotating bed assembly 12, and a cooling zone 14 is located on the lower side. The thickness adjustment assembly 13 includes a scraper 131 and a porous exhaust plate 132 connected to its lower end. A lifting adjustment plate 133 connected to the upper end of the scraper 131 is fixedly installed inside the gas collection hood housing 61 of the gas collection unit 60, allowing the scraper 131 to move up and down on the gas collection hood housing 61. By adjusting the height of the scraper 131, the distance between the porous exhaust plate 132 and the rotating bed surface 121 can be changed, thus adapting to different material quantities or different pyrolysis stages. The evenly spaced exhaust holes on the porous exhaust plate 132 are used to promptly discharge the volatile gases generated during pyrolysis within the rotating bed assembly 12 area, which are then collected in the upper space of the pyrolysis furnace main unit 10.

[0026] Example 2 Reference Figures 1-5 As shown, this is the second embodiment of the present invention. Based on embodiment 1, its working principle and usage process are as follows: Coal enters the device through the feeding auger 23 in the feeding unit 20, and after being evenly distributed by the distributor 22, it falls into the rotating bed assembly 12 area inside the pyrolysis furnace main unit 10. The main drive shaft 30 drives the rotating bed assembly 12 to rotate under external power. At the same time, the thickness adjustment assembly 13 is adjusted up and down in the gas collecting hood housing 61 through the lifting adjustment plate 133, so that the porous exhaust plate 132 maintains a suitable distance from the rotating bed surface 121, ensuring that the coal bed thickness is uniform.

[0027] The heat source enters the hot gas distribution chamber 124 through the heat source inlet 50, and is evenly distributed to the coal by the vent valve on the rotating bed surface 121 to carry out the pyrolysis reaction. The generated pyrolysis gas enters the exhaust channel 62 through the exhaust holes on the porous exhaust plate 132, and is promptly discharged through the exhaust pipe 63. The pyrolyzed semi-coke is gradually moved to the cooling zone 14 for cooling under the rotation of the rotating bed assembly 12, and is finally discharged through the discharge auger 41 in the discharge port 40.

[0028] Throughout the process, the main drive shaft 30 synchronously drives the feeding auger 23, the discharging auger 123, and the discharging auger 41 to operate in a coordinated manner, realizing continuous automated operation of feeding, pyrolysis, cooling, and discharging, which significantly improves pyrolysis efficiency and product quality stability.

[0029] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rotating bed high volatile matter coal pyrolysis device, characterized in that: The pyrolysis furnace includes a main body unit (10), the upper end of which is connected to a feeding unit (20), and a main drive shaft (30) is installed on the feeding unit (20). The lower end of the pyrolysis furnace is provided with a discharge port (40), and a discharge auger (41) is installed in the discharge port (40). The pyrolysis furnace is connected to a heat source inlet (50), and a gas collection unit (60) is provided on the upper side of the interior of the pyrolysis furnace. The pyrolysis furnace main unit (10) includes a furnace shell (11) and a rotating bed assembly (12) installed inside the furnace shell (11). A thickness adjustment assembly (13) is provided on the upper side of the rotating bed assembly (12), and a cooling zone (14) is provided on the lower side of the rotating bed assembly (12). The feeding unit (20) includes a feeding bin (21) and a feeder (22) connected to the lower side of the feeding bin (21). A feeding auger (23) is provided in the feeding bin (21). The gas collection unit (60) includes a gas collection hood housing (61) and a gas exhaust passage (62) opened in the gas collection hood housing (61), and a gas exhaust pipe (63) is provided in the gas exhaust passage (62).

2. The rotating bed high volatile matter coal pyrolysis device according to claim 1, characterized in that: The rotary bed assembly (12) includes a rotary bed surface (121) and a discharge port (122) connected to the lower end of the rotary bed surface (121). A discharge auger (123) is provided inside the discharge port (122), and a hot air distribution chamber (124) is provided on the lower side of the rotary bed surface (121).

3. The rotating bed high volatile matter coal pyrolysis device according to claim 2, characterized in that: Ventilation valves are evenly distributed on the rotating bed surface (121), and the hot air distribution chamber (124) is connected to the heat source inlet (50).

4. The rotating bed high volatile matter coal pyrolysis device according to claim 1, characterized in that: The thickness adjustment component (13) includes a scraper (131) and a porous exhaust plate (132) connected to the lower end of the scraper (131), and a lifting adjustment plate (133) is connected to the upper end of the scraper (131).

5. The rotating bed high volatile matter coal pyrolysis device according to claim 4, characterized in that: The porous exhaust plate (132) is provided with exhaust holes evenly distributed.

6. The rotating bed high volatile matter coal pyrolysis device according to claim 4, characterized in that: The scraper (131) is fixedly connected to the lifting adjustment plate (133), wherein the lifting adjustment plate (133) is fixedly installed inside the gas collection hood housing (61) so that the scraper (131) can move up and down on the gas collection hood housing (61).

7. The rotating bed high volatile matter coal pyrolysis device according to claim 1, characterized in that: The main drive shaft (30) is installed through the pyrolysis furnace main body unit (10) and the feeding unit (20), and the main drive shaft (30) is fixedly connected to the feeding auger (23), the unloading auger (123) and the discharge auger (41).

Images