Carbonization furnace rapid cooling system based on nitrogen circulation

Abstract

The utility model belongs to the technical field of high-temperature carbide furnaces, and provides a carbide furnace rapid cooling system based on nitrogen circulation, which comprises a cooler assembly, a cooler shell, a fin coil pipe fitting arranged in the cooler shell, and a water flow cavity arranged between the fin coil pipe fitting and the cooler shell; the nitrogen circulating assembly comprises a nitrogen inlet communicated with the bottom of the carbonization furnace and a nitrogen outlet communicated with the top of the carbonization furnace, and the two ends of the fin coil pipe fitting are communicated between the nitrogen inlet and the nitrogen outlet; the water circulation assembly comprises a water inlet communicated with the bottom of the cooler shell and a water outlet communicated with the top of the cooler shell, and a water tank is communicated between the water inlet and the water outlet through a water circulation piece. According to the utility model, the cooling time is shortened by utilizing the circulation of low-temperature nitrogen in the carbonization furnace, and the nitrogen consumption is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of high-temperature carbonization furnace technology, and in particular relates to a rapid cooling system for carbonization furnaces based on nitrogen circulation. Background Technology

[0002] The carbonization furnace is a key piece of equipment in the carbon material processing process. After carbonization is complete, the furnace temperature must be reduced to below 60°C before subsequent material removal can proceed. However, current cooling methods often rely on natural cooling and nitrogen is blown into the furnace to prevent air from entering and causing oxidation. This method not only consumes a large amount of nitrogen but also introduces nitrogen directly into the atmosphere. Furthermore, the natural cooling process is inevitably time-consuming, hindering efficient use of equipment time and posing significant problems in terms of both cost and production time. Utility Model Content

[0003] The purpose of this invention is to provide a rapid cooling system for a carbonization furnace based on nitrogen circulation to solve the above-mentioned problems and achieve the goal of shortening the cooling time and reducing nitrogen consumption by utilizing low-temperature nitrogen to circulate in the carbonization furnace.

[0004] To achieve the above objectives, this utility model provides the following solution: a rapid cooling system for a carbonization furnace based on nitrogen circulation, comprising:

[0005] A cooler assembly includes a cooler housing, a finned coil tube is disposed inside the cooler housing, and a water flow cavity is disposed between the finned coil tube and the cooler housing;

[0006] A nitrogen circulation assembly includes a nitrogen inlet connected to the bottom of the carbonization furnace and a nitrogen outlet connected to the top of the carbonization furnace, wherein the two ends of the finned coil are connected between the nitrogen inlet and the nitrogen outlet.

[0007] The water circulation assembly includes an inlet connected to the bottom of the cooler housing and an outlet connected to the top of the cooler housing, and a water tank is connected between the inlet and the outlet via a water circulation component.

[0008] Preferably, the finned coil includes a nitrogen coil disposed within the cooler housing. The two ends of the nitrogen coil are respectively connected to an air inlet and an air outlet. The air inlet and the air outlet are respectively located at the bottom and top of the side wall of the cooler housing. A plurality of fins are fixedly connected to the side wall of the nitrogen coil, and the plurality of fins are correspondingly disposed with respect to the water flow cavity.

[0009] Preferably, the air outlet is connected to the nitrogen inlet via an air pump, and a second valve is connected between the air outlet of the air pump and the nitrogen inlet. The air inlet is connected to the nitrogen outlet via a third valve.

[0010] Preferably, the water circulation component includes a water pump, the outlet of which is connected to the inlet, and the inlet of which is connected to the water tank.

[0011] Preferably, it also includes a steam humidification component, which includes a steam generator and a steam inlet connected to the carbonization furnace. The liquid inlet of the steam generator is connected to the water outlet, and the steam outlet of the steam generator is connected to the steam inlet through a fourth valve.

[0012] A fifth valve, which connects the outlet and the water tank.

[0013] Preferably, the top of the carbonization furnace is connected to a pyrolysis gas discharge valve.

[0014] Preferably, it also includes a nitrogen storage tank, the inlet of which is connected to the outlet of the gas pump via a first valve.

[0015] Compared with existing technologies, this invention has the following advantages and technical effects: The main function of the finned coil is to facilitate heat exchange between the nitrogen flowing inside and the water flowing outside, thereby lowering the nitrogen temperature and ensuring that the nitrogen entering the carbonization furnace from the nitrogen inlet is at a low temperature; the main function of the water flow chamber is to allow cooling water to flow outside the finned coil; the main function of the water circulation component is to allow water to circulate between the water flow chamber and the water tank, carrying away the heat from the nitrogen. Overall, this invention rapidly removes heat from the carbonization furnace by circulating low-temperature nitrogen between the carbonization furnace and the cooler components, improving heat exchange efficiency. Simultaneously, because the nitrogen is recycled after cooling, the cooling time of the finished biomass carbon is significantly shortened, the production cycle is reduced, and production efficiency is improved, which is conducive to the industrialization, large-scale production, and continuous operation of biomass carbonization. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the 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.

[0017] Figure 1 This is a connection diagram of the cooling system of this utility model;

[0018] The components are as follows: 1. Carbonization furnace; 2. Water outlet valve; 3. Nitrogen inlet; 4. Nitrogen outlet; 5. Steam inlet; 6. Cooler shell; 7. Nitrogen coil; 8. Fins; 9. Steam generator; 10. Water outlet; 11. Air outlet; 12. Water inlet; 13. Air inlet; 14. First valve; 15. Air pump; 16. Second valve; 17. Nitrogen storage tank; 18. Water pump; 19. Water tank; 20. Third valve; 21. Fourth valve; 22. Pyrolysis gas discharge valve; 23. Fifth valve. Detailed Implementation

[0019] 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.

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Reference Figure 1 This utility model provides a rapid cooling system for a carbonization furnace based on nitrogen circulation, comprising:

[0022] The cooler assembly includes a cooler housing 6, a finned coil tube is provided inside the cooler housing 6, and a water flow cavity is provided between the finned coil tube and the cooler housing 6.

[0023] The nitrogen circulation assembly includes a nitrogen inlet 3 connected to the bottom of the carbonization furnace 1 and a nitrogen outlet 4 connected to the top of the carbonization furnace 1, with both ends of the finned coil connected between the nitrogen inlet 3 and the nitrogen outlet 4.

[0024] The water circulation assembly includes an inlet 12 connected to the bottom of the cooler housing 6 and an outlet 10 connected to the top of the cooler housing 6. A water tank 19 is connected between the inlet 12 and the outlet 10 through a water circulation component.

[0025] The main function of the finned coil fitting is to facilitate heat exchange between the nitrogen gas flowing inside and the water flowing outside, thereby lowering the nitrogen temperature and ensuring that the nitrogen gas entering the carbonization furnace 1 from the nitrogen inlet 3 is at a low temperature. The main function of the water flow chamber is to allow cooling water to flow outside the finned coil fitting. The main function of the water circulation component is to circulate water between the water flow chamber and the water tank 19, carrying away the heat from the nitrogen. Overall, this invention rapidly removes heat from the carbonization furnace by circulating low-temperature nitrogen gas between the carbonization furnace and the cooler components, improving heat exchange efficiency. Simultaneously, because the nitrogen gas is recycled after cooling, the cooling time of the biomass carbon product is significantly shortened, the production cycle is reduced, and production efficiency is improved, which is conducive to the industrialization, large-scale production, and continuous operation of biomass carbonization.

[0026] Further optimization of the scheme: the finned coil includes a nitrogen coil 7 installed in the cooler housing 6. The two ends of the nitrogen coil 7 are respectively connected to an air inlet 13 and an air outlet 11. The air inlet 13 and the air outlet 11 are located at the bottom and top of the side wall of the cooler housing 6, respectively. Several fins 8 are fixedly connected to the side wall of the nitrogen coil 7, and the several fins 8 are correspondingly arranged with the water flow cavity.

[0027] like Figure 1 As shown, nitrogen gas enters the nitrogen coil 7 from the nitrogen outlet 4 of the carbonization furnace 1 through the pipeline and the inlet 13. It then enters the interior of the carbonization furnace 1 from the outlet 11 at the other end of the nitrogen coil 7 through the pipeline and the nitrogen inlet 3, completing heat absorption and being discharged from the nitrogen outlet 4, forming a nitrogen circulation. As the nitrogen gas flows in the nitrogen coil 7, it transfers heat to the fins 8. The fins 8 exchange heat with the water in the water flow chamber, allowing the water to carry away the heat and cool the nitrogen gas.

[0028] In a further optimized design, the outlet 11 is connected to the nitrogen inlet 3 via the air pump 15. A second valve 16 is also connected between the outlet of the air pump 15 and the nitrogen inlet 3. The inlet 13 is connected to the nitrogen outlet 4 via the third valve 20.

[0029] like Figure 1 As shown, the main function of the air pump 15 is to provide power for the flow of nitrogen between the carbonization furnace 1 and the nitrogen coil 7.

[0030] The scheme is further optimized. The water circulation component includes a water pump 18, the outlet of the water pump 18 is connected to the inlet 12, and the inlet of the water pump 18 is connected to the water tank 19.

[0031] like Figure 1 As shown, the main function of the water pump 18 is to provide power for the flow of water between the cooler housing 6 and the water tank 19.

[0032] Further optimization of the scheme also includes a steam humidification component, which includes a steam generator 9 and a steam inlet 5 connected to the carbonization furnace 1. The liquid inlet of the steam generator 9 is connected to the water outlet 10, and the steam outlet of the steam generator 9 is connected to the steam inlet 5 through the fourth valve 21.

[0033] Fifth valve 23 is connected between outlet 10 and water tank 19.

[0034] like Figure 1 As shown, when the temperature inside the carbonization furnace 1 drops to 100℃~120℃, steam needs to be introduced into the carbonization furnace 1 to moisten the charcoal and prevent spontaneous combustion. Specifically, when moistening is required, the fifth valve 23 is closed and the fourth valve 21 is opened. The water pump 18 pumps the water in the cooler shell 6 directly to the steam generator 9 to form steam, which is then injected into the carbonization furnace 1 through the steam inlet 5. At this time, the water in the cooler shell 6 exchanges heat with the high-temperature nitrogen gas, which can preheat the water, fully recover heat energy, and reduce the energy consumption of the steam generator 9.

[0035] To further optimize the design, a pyrolysis gas discharge valve 22 is connected to the top of the carbonization furnace 1.

[0036] like Figure 1 As shown, before nitrogen cooling, the pyrolysis gas discharge valve 22 can be opened and the third valve 20 closed. Simultaneously, the gas pump 15 is started to charge nitrogen into the carbonization furnace 1, discharging the pyrolysis gas from the furnace 1 through the pyrolysis gas discharge valve 22 to subsequent processing equipment, thus completing the pyrolysis gas replacement in the carbonization furnace 1. After replacement, the pyrolysis gas discharge valve 22 is closed and the third valve 20 is opened to begin nitrogen circulation cooling.

[0037] Further optimization of the scheme also includes a nitrogen storage tank 17, the inlet and outlet of which are connected to the outlet of the air pump 15 via a first valve 14.

[0038] like Figure 1 As shown, in the initial stage of cooling, the first valve 14 is opened to release nitrogen from the nitrogen storage tank 17, which is then pumped into the carbonization furnace 1 by the air pump 15. When cooling is complete, the first valve 14 is opened again and the second valve 16 is closed, and the nitrogen is pumped back into the nitrogen storage tank 17 by the air pump 15. This effectively reduces nitrogen consumption compared to equipment that directly releases nitrogen into the atmosphere.

[0039] In a further optimized design, a water outlet valve 2 is connected to the bottom of the carbonization furnace 1, and the water outlet valve 2 is connected to the water tank 19 via a pipeline. Condensate during the humidification process can flow back into the water tank 19 through the water outlet valve 2.

[0040] The working process of this embodiment is as follows: When it is necessary to cool down the biomass char in the carbonization furnace 1, firstly, open the first valve 14, the second valve 16, and the pyrolysis gas discharge valve 22, and close the third valve 20. Start the air pump 15 to discharge the pyrolysis gas in the carbonization furnace 1. Then, close the pyrolysis gas discharge valve 22 and the first valve 14, and open the third valve 20 to allow nitrogen to circulate between the carbonization furnace 1 and the nitrogen coil 7. At the same time, start the water pump 18 to circulate the water in the water tank 19 between the cooler shell 6 and the water tank 19. When the water comes into contact with the fins 8, it exchanges heat with the high-temperature nitrogen, reducing the temperature of the nitrogen introduced into the carbonization furnace 1 and achieving rapid cooling.

[0041] When the temperature drops to 100℃~120℃, the fifth valve 23 is closed and the fourth valve 21 is opened. The water pump 18 pumps the water in the cooler shell 6 directly to the steam generator 9 to form steam, which is then injected into the carbonization furnace 1 through the steam inlet 5.

[0042] Nitrogen and water vapor are continuously introduced until the temperature inside the carbonization furnace 1 drops below 60°C, at which point the cooling process is stopped. At this point, the second valve 16 is closed, and most of the nitrogen is refilled into the nitrogen storage tank 17 via the air pump 15 to reduce nitrogen consumption.

[0043] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0044] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A rapid cooling system for a carbonization furnace based on nitrogen circulation, characterized in that, include: A cooler assembly includes a cooler housing (6), a finned coil tube is provided inside the cooler housing (6), and a water flow cavity is provided between the finned coil tube and the cooler housing (6); The nitrogen circulation assembly includes a nitrogen inlet (3) connected to the bottom of the carbonization furnace (1) and a nitrogen outlet (4) connected to the top of the carbonization furnace (1), with both ends of the finned coil connected between the nitrogen inlet (3) and the nitrogen outlet (4). The water circulation assembly includes an inlet (12) connected to the bottom of the cooler housing (6) and an outlet (10) connected to the top of the cooler housing (6), and a water tank (19) is connected between the inlet (12) and the outlet (10) through a water circulation component.

2. The rapid cooling system for a carbonization furnace based on nitrogen circulation according to claim 1, characterized in that: The finned coil assembly includes a nitrogen coil (7) disposed in the cooler housing (6). The two ends of the nitrogen coil (7) are respectively connected to an air inlet (13) and an air outlet (11). The air inlet (13) and the air outlet (11) are respectively located at the bottom and top of the side wall of the cooler housing (6). A number of fins (8) are fixedly connected to the side wall of the nitrogen coil (7). The number of fins (8) are correspondingly arranged with the water flow cavity.

3. The rapid cooling system for a carbonization furnace based on nitrogen circulation according to claim 2, characterized in that: The air outlet (11) is connected to the nitrogen inlet (3) via an air pump (15). A second valve (16) is also connected between the air outlet of the air pump (15) and the nitrogen inlet (3). The air inlet (13) is connected to the nitrogen outlet (4) via a third valve (20).

4. The rapid cooling system for a carbonization furnace based on nitrogen circulation according to claim 1, characterized in that: The water circulation component includes a water pump (18), the outlet of which is connected to the inlet (12), and the inlet of which is connected to the water tank (19).

5. A rapid cooling system for a carbonization furnace based on nitrogen circulation according to claim 1, characterized in that: It also includes a steam humidification component, which includes a steam generator (9) and a steam inlet (5) connected to the carbonization furnace (1). The liquid inlet of the steam generator (9) is connected to the water outlet (10), and the steam outlet of the steam generator (9) is connected to the steam inlet (5) through a fourth valve (21). The fifth valve (23) is connected between the outlet (10) and the water tank (19).

6. A rapid cooling system for a carbonization furnace based on nitrogen circulation according to claim 1, characterized in that: The top of the carbonization furnace (1) is connected to a pyrolysis gas discharge valve (22).

7. A rapid cooling system for a carbonization furnace based on nitrogen circulation according to claim 3, characterized in that: It also includes a nitrogen storage tank (17), the inlet of which is connected to the outlet of the air pump (15) through a first valve (14).

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