A continuous hydrothermal carbonization device

Abstract

The present invention discloses a continuous hydrothermal carbonization device, which relates to the technical field of biochar, and includes an annular furnace tube, a medium-temperature carbonization furnace with adjustable temperature, a low-temperature drying furnace, a sewage collection and lifting device, and a power transmission device. The bottom track of the annular furnace tube is connected to the rotating shaft on the power transmission device through gears, and the rotation of the power transmission device drives the annular furnace tube to rotate. The annular furnace tube passes through the medium-temperature carbonization furnace with adjustable temperature and the low-temperature drying furnace in a suspended manner, and the sewage collection and lifting device is arranged at the lower part of the low-temperature drying furnace. The present invention has a high degree of mechanization and can continuously produce hydrothermal carbon, greatly improving the working efficiency of the hydrothermal carbonization furnace. Its daily working efficiency is 3 times higher than that of the prior art, being suitable for industrial mass production of hydrothermal carbon. At the same time, the recycling of high-COD and ammonia-nitrogen sewage reduces the output of sewage, and the finally generated high-COD and ammonia-nitrogen sewage can be made into liquid fertilizer through pretreatment.

Description

Technical Field

[0001] The present invention relates to the technical field of biochar, and specifically to a continuous hydrothermal carbonization device. Background Art

[0002] In recent years, news reports on global climate anomalies have been everywhere, such as rising sea levels, melting glaciers, continuous high temperatures, etc. The culprit of global climate anomalies is nothing but simple carbon. The key to winning this climate war lies in how to sequester carbon and reduce carbon emissions. This means that the direction of China's energy demand is gradually turning into low-carbon environmental protection, energy conservation and emission reduction. Developing and finding clean energy to replace fossil energy has become the most concerned topic among scientific research scholars. In recent years, hydrothermal carbonization has been considered a promising thermochemical treatment method, which can transform organic solid waste and convert biomass energy such as straw, food waste, and sludge into more valuable products. It has a wide range of uses and can be used as fuel, carbon-based fertilizer, and soil conditioner, etc.

[0003] At present, there are not a few domestic devices and apparatuses for hydrothermal carbonization. The hydrothermal carbonization process mainly includes material crushing, high-temperature and high-pressure carbonization, cooling, and dehydration and drying. There are only optimizations in the process, but the problem of low operating efficiency of the hydrothermal carbonization furnace has not been solved. The present invention provides a continuous hydrothermal carbonization device to solve the above problems. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a continuous hydrothermal carbonization device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: A continuous hydrothermal carbonization device includes an annular furnace tube, a medium-temperature carbonization furnace with adjustable temperature, a low-temperature drying furnace, a sewage collection and lifting device, and a power transmission device. The bottom track of the annular furnace tube is connected to the rotating shaft on the power transmission device through a gear, and the rotation of the power transmission device drives the annular furnace tube to rotate. The annular furnace tube passes through the medium-temperature carbonization furnace with adjustable temperature and the low-temperature drying furnace in a suspended manner, and the sewage collection and lifting device is arranged below the low-temperature drying furnace.

[0006] For the continuous hydrothermal carbonization device as described above, preferably, the annular furnace tube is spliced by six single furnace tubes, and each single furnace tube is independent of each other, and the connection part is filled with sand and gravel.

[0007] For the continuous hydrothermal carbonization device as described above, preferably, each single furnace tube is provided with a feed inlet and a pressure relief valve at the upper end, and the bottom end is of a symmetric slope type, and is successively provided with a retention screen and a material outlet. A temperature alarm device and a pressure detection device are arranged inside the furnace tube, and a gear track is arranged outside the furnace body.

[0008] For the continuous hydrothermal carbonization device as described above, preferably, the two transmission rods on the power transmission device rotate in opposite directions with the same rotation frequency. Each time the gear on the transmission rod rotates, the distance traveled is 1 / 6 of the circumference of the annular furnace tube, and the central angle is 60°.

[0009] For the continuous hydrothermal carbonization device as described above, preferably, the furnace chambers of the medium-temperature carbonization furnace and the low-temperature drying furnace are arc-shaped, and the arc is the same as that of the single furnace tube.

[0010] For the continuous hydrothermal carbonization device as described above, preferably, the temperature adjustment range of the medium-temperature carbonization furnace is 180 - 400 °C, and the temperature adjustment range of the low-temperature drying furnace is 60 - 130 °C.

[0011] For the continuous hydrothermal carbonization device as described above, preferably, the medium-temperature carbonization furnace completely wraps the single furnace tube, and the two sides of the low-temperature drying furnace wrap the furnace tube, and the upper and lower ends are exposed.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The present invention has a high degree of mechanization and can continuously produce hydrothermal carbon, greatly improving the working efficiency of the hydrothermal carbonization furnace. Its daily working efficiency is 3 times higher than that of the prior art, and it is suitable for industrial mass production of hydrothermal carbon. At the same time, the high-COD and ammonia-nitrogen sewage is recycled, reducing the sewage production. The finally produced high-COD and ammonia-nitrogen sewage can be made into liquid fertilizer through pretreatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of the continuous hydrothermal carbonization device of the present invention;

[0014] Figure 2 It is a main schematic diagram of the single furnace tube of the present invention;

[0015] Figure 3 It is a sectional schematic diagram of the medium-temperature carbonization furnace of the present invention;

[0016] Figure 4 It is a sectional schematic diagram of the low-temperature drying furnace of the present invention.

[0017] In the figure: 1. Annular furnace tube; 11. Single furnace tube; 12. Sand and gravel; 13. Feed inlet; 14. Pressure relief valve; 15. Outlet baffle; 16. Screen; 17. Gear track; 2. Medium-temperature carbonization furnace; 21. Thermal insulation material 1; 3. Low-temperature drying furnace; 31. Thermal insulation material 2; 4. Sewage collection and lifting device; 5. Power transmission device; 51. Transmission rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] Please refer to Figures 1-4 , the present invention provides a technical solution: a continuous hydrothermal carbonization device, including an annular furnace tube 1, a medium-temperature carbonization furnace 2 with adjustable temperature, a low-temperature drying furnace 3, a sewage collection and lifting device 4, and a power transmission device 5. The annular furnace tube 1 is connected by six single furnace tubes 11. Sand and gravel 12 are filled between each single furnace tube 11. The upper end of the single furnace tube 11 is provided with a feed inlet 13 and a pressure relief valve 14, and the bottom is provided with a screen 16 and an outlet baffle 15. There is a gear track 17 on the outer side of the furnace body.

[0020] The gear track 17 at the bottom of the annular furnace tube 1 is lapped with the gear at the end of the transmission rod 51 on the power transmission device 5. The rotation of the power transmission device 5 drives the rotation of the annular tubular furnace body 1. The annular furnace tube 1 passes through the medium-temperature carbonization furnace 2 with adjustable temperature and the low-temperature drying furnace 3 in a suspended manner. The sewage collection and lifting device 4 is arranged at the lower part of the low-temperature drying furnace 3.

[0021] The furnace chamber of the medium-temperature carbonization furnace 2 is arc-shaped, and the arc is consistent with that of the single furnace tube 11. The medium-temperature carbonization furnace 2 completely wraps the single furnace tube 11, and heat-insulating material 21 is filled in the middle to reduce the gap.

[0022] The furnace chamber of the low-temperature drying furnace 3 is arc-shaped, and the arc is consistent with that of the single furnace tube 11. The two sides of the low-temperature drying furnace 3 wrap the single furnace tube 11, and heat-insulating material 31 is filled in the middle to reduce the gap. The upper and lower sides are exposed, and the sewage collection and lifting device 4 is suspended at the bottom. The sewage collection and lifting device 4 is equipped with a water pump.

[0023] The carbonization process successively experiences the initial feeding area, the medium-temperature carbonization furnace 2 and the low-temperature drying furnace 3. The single furnace tube 11 containing materials rotates into the medium-temperature carbonization furnace 2 for carbonization reaction. At this time, the single furnace tube 11 in the feeding area performs the steps of discharging the hydrothermal carbon finished product dried in the previous step and the feeding step. While the single furnace tube 11 containing carbonized materials rotates into the low-temperature drying furnace 3 for pressure relief, exhaust, dehydration and drying, the single furnace tube 11 containing materials in the feeding area rotates into the medium-temperature carbonization furnace 2. The hydrothermal carbon finished product after drying is rotated into the initial feeding area in the single furnace tube 11, and the hydrothermal carbon finished product is discharged, and feeding starts for the next cycle. At the same time, the single furnace tube 11 in the medium-temperature carbonization furnace 2 is rotated into the low-temperature drying furnace 3, and the above steps are repeated in sequence.

[0024] High-COD and ammonia-nitrogen sewage can be processed into liquid fertilizer.

[0025] The working principle is as follows:

[0026] Step 1: Close the lower outlet baffle 15 of the single furnace tube 11. Add materials through the upper feed port 13 of the single furnace tube 11. Pump the sewage in the sewage collection and lifting device 4 to the annular furnace tube 1. Close the upper feed port 13 and turn on the temperature alarm device and the air pressure detection device;

[0027] Step 2: The distance that the gear of the power transmission device 5 rotates is 1 / 6 of the circumference of the annular furnace tube 1, and the rotation angle is 60°. The single furnace tube 11 containing materials enters the heating zone of the medium-temperature carbonization furnace 2 and stays for 4 hours. After carbonization, the power transmission device 5 continues to repeat the above rotation;

[0028] Step 3: The single furnace tube 11 containing carbonized materials enters the drying zone of the low-temperature drying furnace 3. Slowly open the pressure relief valve 14 at the top of the single furnace tube 11. Wait until the air pressure inside the single furnace tube 11 drops to the standard atmospheric pressure. Open the top feed port 13 and the bottom material outlet baffle 15. The screen 16 intercepts the hydrothermal carbon. Rinse the hydrothermal carbon repeatedly with tap water, collect the sewage, turn on the heating switch of the low-temperature drying furnace 3, and slowly dry the hydrothermal carbon. When the time is up, the power transmission device 5 continues to repeat the above rotation;

[0029] Step 4: The single furnace tube 11 containing carbonized materials enters the initial feeding area. Open the bottom screen 16 to collect the dried hydrothermal carbon finished products;

[0030] Step 5: Close the screen 16 and the bottom outlet baffle 15. Pump the sewage collected in Step 3 into the single furnace tube 11, add materials, and repeat the above steps in sequence.

[0031] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A continuous hydrothermal carbonization device, characterized in that: The utility model comprises an annular furnace tube, a medium-temperature carbonization furnace with adjustable temperature, a low-temperature drying furnace, a sewage collecting and lifting device, and a power transmission device. The bottom track of the annular furnace tube is connected with the rotating shaft on the power transmission device through gears, and the rotation of the power transmission device drives the annular furnace tube to rotate. The annular furnace tube is suspended in the air and passes through the medium-temperature carbonization furnace with adjustable temperature and the low-temperature drying furnace, and the sewage collecting and lifting device is arranged at the lower part of the low-temperature drying furnace.

2. The continuous hydrothermal carbonization device according to claim 1, characterized in that: The annular furnace tube is formed by splicing six sections of single furnace tubes, and each single furnace tube is independent of each other, and the connection parts are filled with sand and gravel.

3. The continuous hydrothermal carbonization device according to claim 2, characterized in that: The upper end of the single furnace tube is provided with a feed port and a pressure relief valve, the bottom end is a symmetrical slope type, and is provided with an interception screen and a material outlet in sequence. A temperature alarm device and an air pressure detection device are provided in the furnace tube, and a gear track is provided on the outside of the furnace body.

4. A continuous hydrothermal carbonization device according to claim 3, characterized in that: The two transmission rods on the power transmission device rotate in opposite directions and at the same frequency. The gears on the transmission rods rotate each time for 1 / 6 of the circumference of the annular furnace tube, and the central angles are all 60°.

5. A continuous hydrothermal carbonization device according to claim 4, characterized in that: The furnaces of the medium-temperature carbonization furnace and the low-temperature drying furnace are arc-shaped, and the arc is consistent with that of the single furnace tube.

6. The continuous hydrothermal carbonization device according to claim 5, characterized in that: The temperature adjustment range of the medium-temperature carbonization furnace is 180-400°C, and the temperature adjustment range of the low-temperature drying furnace is 60-130°C.

7. A continuous hydrothermal carbonization device according to claim 5, characterized in that: The medium-temperature carbonization furnace fully wraps the single furnace tube, and the low-temperature drying furnace wraps the furnace tubes on both sides, and the upper end and the lower end are exposed.

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