Carbonization flue gas purification waste heat recovery device

Abstract

The utility model discloses a kind of carbon-making flue gas purification waste heat recovery devices, it is related to flue gas waste heat recovery technical field, including heat preservation tank, the heat preservation tank bottom is fixedly connected with base;The heat preservation tank top is fixedly connected with exhaust pipe, the exhaust pipe is connected with spray tower, the heat preservation tank inside is fixedly connected with heat exchange pipe, the heat exchange pipe both ends are all through the one side of heat preservation tank and extend to its outside, the heat exchange pipe is spirally distributed in heat preservation tank interior.The carbon-making flue gas purification waste heat recovery device, the heat exchange pipe of heat preservation tank inside fixedly connected with spirally distributed and for multilayer structure, immerse in the treatment liquid that has absorbed flue gas heat, heat exchange pipe both ends are through the one side of heat preservation tank and extend to outside, can be inhaled to be heated medium, the heat of treatment liquid is transferred to the medium in heat exchange pipe and makes it temperature rise, multilayer spiral structure increases heat exchange area, greatly improves waste heat recovery efficiency, realizes the efficient use to carbon-making flue gas waste heat.

Description

Technical Field

[0001] This utility model relates to the field of flue gas waste heat recovery technology, specifically a waste heat recovery device for charcoal production flue gas purification. Background Technology

[0002] The carbon flue gas purification and waste heat recovery device is a comprehensive device that purifies carbon flue containing ash, particles and harmful gases and recovers the waste heat at the same time.

[0003] For example, Chinese patent CN215766534U discloses a waste heat recovery and utilization device for tail gas of activated carbon carbonization furnace. The tail gas (combustible flue gas) generated during the operation of the carbonization furnace can enter the coke removal pool through the first flue gas pipeline for dust reduction treatment. After dust reduction treatment, part of the combustible flue gas can be led to the ignition device through the second and third flue gas pipelines by a high-temperature and high-pressure fan. After the combustible flue gas and air are mixed and ignited by the ignition device, it is transported to the pre-combustion chamber for combustion. The flue gas after combustion forms high-temperature heat energy and enters the heat storage chamber to further burn the incompletely combusted flue gas. The high-temperature heat energy in the heat storage chamber can be returned to the carbonization furnace to participate in carbonization, which can realize the recovery and utilization of part of the flue gas, improve the heat utilization rate of flue gas, and achieve environmentally friendly production and low energy consumption in activated carbon production. The other part of the flue gas after dust reduction treatment can enter the post-combustion chamber for heat exchange treatment before being discharged.

[0004] In existing technologies, some waste heat recovery devices have simple structures and small heat exchange areas, which cannot fully absorb the heat in the charcoal-making flue gas, resulting in low waste heat recovery efficiency and insufficient contact between the flue gas purification device and the reagent and flue gas. Utility Model Content

[0005] The purpose of this utility model is to provide a waste heat recovery device for charcoal production flue gas purification, so as to solve the problem in the prior art mentioned above, that some waste heat recovery devices have simple structures and small heat exchange areas, which cannot fully absorb the heat in charcoal production flue gas, resulting in low waste heat recovery efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a waste heat recovery device for charcoal production flue gas purification, comprising an insulated tank, wherein a base is fixedly connected to the bottom of the insulated tank; An exhaust pipe is fixedly connected to the top of the heat preservation tank and is connected to the spray tower. A heat exchange tube is fixedly connected inside the heat preservation tank. Both ends of the heat exchange tube penetrate one side of the heat preservation tank and extend outward. The heat exchange tube is spirally distributed inside the heat preservation tank and is designed as a multi-layer structure filled inside the heat preservation tank.

[0007] Preferably, the insulated tank has a dosing port on one side of the top, and a sealing cap is threaded to the outer side of the top of the dosing port. The lower part of the insulated tank is designed as a funnel shape, and a drain outlet is provided in the middle of the bottom of the insulated tank.

[0008] Preferably, an air inlet pipe is fixedly connected to one side of the heat preservation tank via a bracket. One end of the air inlet pipe extends to the middle of the bottom of the heat preservation tank, and the end of the air inlet pipe located in the middle of the bottom of the heat preservation tank extends vertically upward and is aligned with the center of the heat preservation tank.

[0009] Preferably, a pressurizing pipe is fixedly connected to the end of the air inlet pipe away from the heat preservation tank. The connection between the pressurizing pipe and the air inlet pipe is higher than the water level inside the heat preservation tank. A gas pressurization component is provided inside the pressurizing pipe, and the pressurizing pipe is connected to a gas filtration device.

[0010] Preferably, the top of one end of the air inlet pipe inside the heat preservation tank is rotatably connected to a rotating box, and the connection between the air inlet pipe and the rotating box forms a rotary sealing structure.

[0011] Preferably, a radially distributed diversion pipe is fixedly connected to the outside of the rotating box, and an equally spaced branch pipe is fixedly connected to the diversion pipe. The top of the branch pipe is provided with uniformly distributed exhaust holes, and each exhaust hole is provided with a filter screen.

[0012] Preferably, a planetary gear reduction assembly is installed at the top inner side of the rotating box, and a pneumatic turbine is fixedly connected to the input end of the planetary gear reduction assembly. The pneumatic turbine is located inside the air intake pipe to form a gas-driven transmission structure.

[0013] Compared with the prior art, the beneficial effects of this utility model are: This is a waste heat recovery device for charcoal production flue gas purification. Inside the insulated tank, there are multi-layered heat exchange tubes arranged in a spiral pattern. These tubes are immersed in a treatment liquid that has absorbed the heat from the flue gas. Both ends of the heat exchange tubes pass through one side of the insulated tank and extend outwards, allowing the medium to be heated to be introduced. The heat from the treatment liquid is transferred to the medium inside the heat exchange tubes, raising its temperature. The multi-layered spiral structure increases the heat exchange area, greatly improving the waste heat recovery efficiency and achieving efficient utilization of the waste heat from charcoal production flue gas.

[0014] The pneumatic turbine inside the intake pipe rotates under the impact of flue gas, and the planetary gear reduction assembly drives the rotating box to rotate around the axis of the intake pipe. The diversion pipe and branch pipe outside the rotating box rotate synchronously, so that the flue gas discharged from the exhaust port of the branch pipe is more evenly diffused in the treatment liquid, increasing the contact area between the flue gas and the treatment liquid, and improving the purification efficiency and effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic cross-sectional view of the present invention. Figure 3 This is a schematic diagram of the heat exchange tube structure of this utility model; Figure 4This is a schematic diagram of the cross-sectional structure of the insulated tank of this utility model; Figure 5 This is a schematic diagram of the rotating box structure of this utility model; Figure 6 This is a schematic cross-sectional view of the rotating box structure of this utility model.

[0016] In the diagram: 1. Insulated tank; 2. Base; 3. Exhaust pipe; 4. Heat exchange pipe; 5. Dosing port; 6. Drain port; 7. Air inlet pipe; 8. Pressurization pipe; 9. Rotating box; 10. Diverter pipe; 11. Branch pipe; 12. Exhaust port; 13. Pneumatic turbine; 14. Planetary gear reduction assembly. Detailed Implementation

[0017] 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.

[0018] Example 1: Please refer to Figures 1 to 6 The present invention provides the following technical solution: A waste heat recovery device for charcoal production flue gas purification includes an insulated tank 1, with a base 2 fixedly connected to the bottom of the insulated tank 1; an exhaust pipe 3 is fixedly connected to the top of the insulated tank 1, and the exhaust pipe 3 is connected to a spray tower; a heat exchange tube 4 is fixedly connected inside the insulated tank 1, with both ends of the heat exchange tube 4 penetrating one side of the insulated tank 1 and extending outward therefrom; the heat exchange tube 4 is spirally distributed inside the insulated tank 1, and the heat exchange tube 4 is designed as a multi-layer structure filling the inside of the insulated tank 1.

[0019] The top of the heat-insulating tank 1 has a dosing port 5 on one side, and a sealing cap is threaded to the outer side of the top of the dosing port 5. The bottom of the heat-insulating tank 1 is designed as a funnel shape, and a drain port 6 is provided in the middle of the bottom of the heat-insulating tank 1. An air inlet pipe 7 is fixedly connected to one side of the heat-insulating tank 1 by a bracket. One end of the air inlet pipe 7 extends to the middle of the bottom inside the heat-insulating tank 1, and the end of the air inlet pipe 7 located in the middle of the bottom inside the heat-insulating tank 1 extends vertically upward and is aligned with the center of the heat-insulating tank 1. A pressurizing pipe 8 is fixedly connected to the end of the air inlet pipe 7 away from the heat-insulating tank 1. The connection between the pressurizing pipe 8 and the air inlet pipe 7 is higher than the water level inside the heat-insulating tank 1. A gas pressurization component is provided inside the pressurizing pipe 8, and the pressurizing pipe 8 is connected to a gas filtration device.

[0020] The top of one end of the air inlet pipe 7, located inside the heat preservation tank 1, is rotatably connected to a rotating box 9, and the connection between the air inlet pipe 7 and the rotating box 9 forms a rotary sealing structure; a radially distributed branch pipe 10 is fixedly connected to the outside of the rotating box 9, and an equally spaced branch pipe 11 is fixedly connected to the branch pipe 10. The top of the branch pipe 11 is provided with evenly distributed exhaust holes 12, and each exhaust hole 12 is provided with a filter screen; a planetary gear reduction assembly 14 is installed at the top of the inner side of the rotating box 9, and a pneumatic turbine 13 is fixedly connected to the input end of the planetary gear reduction assembly 14, and the pneumatic turbine 13 is located inside the air inlet pipe 7 to form a gas-driven transmission structure.

[0021] The flue gas generated during the charcoal making process first enters the gas filtration equipment connected to the pressurization pipe 8. After the equipment initially filters out larger dust impurities and tar from the flue gas, it enters the interior of the pressurization pipe 8. The gas pressurization component inside the pressurization pipe 8 is activated to pressurize the initially filtered flue gas, giving it sufficient transport pressure to overcome the resistance of subsequent pipelines and equipment. Subsequently, the pressurized flue gas is transported along the inlet pipe 7 towards the insulation tank 1. Because the connection between the pressurization pipe 8 and the inlet pipe 7 is higher than the water level inside the insulation tank 1, the backflow of the treatment liquid in the insulation tank 1 into the pressurization pipe 8 or the gas filtration equipment is prevented.

[0022] When the pressurized flue gas enters the inlet pipe 7 and flows to the bottom of the insulation tank 1, the flue gas impacts the pneumatic turbine 13 located inside the inlet pipe 7. Under the pressure of the flue gas, the pneumatic turbine 13 rotates. Since the pneumatic turbine 13 is fixedly connected to the input end of the planetary gear reduction assembly 14 installed at the top of the inner side of the rotating box 9, the rotational power of the pneumatic turbine 13 is transmitted to the planetary gear reduction assembly 14. After the speed is adjusted by the planetary gear reduction assembly 14, the power is further transmitted to the rotating box 9, causing the rotating box 9 to rotate around the axis of the inlet pipe 7. During this process, the rotational sealing structure at the connection between the inlet pipe 7 and the rotating box 9 can effectively prevent the flue gas from leaking from the connection gap between the two, and at the same time prevent the treatment liquid in the insulation tank 1 from entering the inlet pipe 7, ensuring that the rotating box 9 maintains the system's sealing while rotating stably.

[0023] When the rotating box 9 rotates, the radially distributed diversion pipes 10 fixedly connected to its outer side will rotate synchronously with the rotating box 9, thereby driving the equidistantly distributed branch pipes 11 fixedly connected to the diversion pipes 10 to rotate together. The flue gas entering the rotating box 9 will first be diverted to each diversion pipe 10, and then distributed by the diversion pipes 10 to each branch pipe 11, and finally discharged from the evenly distributed exhaust holes 12 provided at the top of the branch pipes 11. The rotation of the branch pipes 11 can make the flue gas discharged from the exhaust holes 12 diffuse more evenly in the treatment liquid in the heat preservation tank 1, increase the contact area between the flue gas and the treatment liquid, and create more favorable conditions for the subsequent purification reaction.

[0024] Before the flue gas enters the insulation tank 1, a suitable flue gas treatment agent can be added into the insulation tank 1 through the dosing port 5 on one side of the top of the insulation tank 1. After the dosing is completed, the sealing cap on the outer side of the top of the dosing port 5 is tightened to ensure the airtightness of the insulation tank 1. After the treatment agent is mixed with the treatment liquid in the insulation tank 1, when the rotating and diffused flue gas comes into contact with the treatment liquid, the treatment agent will react with the tar, acidic substances and other harmful components in the flue gas to achieve the purification treatment of the flue gas. The precipitates, unreacted fine impurities and trapped dust generated during the purification process will gradually settle into the funnel-shaped structure area at the bottom of the insulation tank 1 under the action of gravity. This funnel-shaped structure helps to concentrate and collect impurities. Subsequently, these impurities can be discharged through the drain port 6 in the middle of the bottom of the insulation tank 1 to avoid excessive accumulation of impurities in the insulation tank 1, which will affect the purification effect and heat exchange efficiency.

[0025] The heat carried by the flue gas during charcoal production is transferred to the treatment liquid during contact with it and as it flows within the insulation tank 1. The heat exchange tubes 4, which are spirally distributed and have a multi-layered structure, are fixedly connected inside the insulation tank 1 and are immersed in the treatment liquid. Both ends of the heat exchange tubes 4 penetrate one side of the insulation tank 1 and extend outwards. The medium to be heated can be introduced into the heat exchange tubes 4 through one end. The heat absorbed by the treatment liquid from the flue gas is further transferred to the medium to be heated within the heat exchange tubes 4, raising the medium's temperature and achieving the recovery of waste heat from the flue gas. After heat exchange, the medium can flow out from the other end of the heat exchange tubes 4 for subsequent production processes or domestic needs. The multi-layered spiral structure of the heat exchange tubes 4 increases the heat exchange area, which helps improve the efficiency of waste heat recovery.

[0026] After purification and waste heat recovery, the flue gas will be discharged from the exhaust pipe 3 fixedly connected to the top of the insulated tank 1 under its own pressure and driven by the subsequent flue gas. Then it will enter the spray tower connected to the exhaust pipe 3 for further deep treatment to meet the relevant emission requirements, and finally complete the purification and waste heat recovery process of the charcoal making flue gas.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A waste heat recovery device for charcoal production flue gas purification, comprising an insulated tank (1), wherein a base (2) is fixedly connected to the bottom of the insulated tank (1); Its features are: The top of the heat preservation tank (1) is fixedly connected to an exhaust pipe (3), which is connected to a spray tower. The heat preservation tank (1) is fixedly connected to a heat exchange pipe (4). Both ends of the heat exchange pipe (4) penetrate one side of the heat preservation tank (1) and extend outward. The heat exchange pipe (4) is spirally distributed inside the heat preservation tank (1), and the heat exchange pipe (4) is a multi-layer structure filled inside the heat preservation tank (1).

2. The waste heat recovery device for charcoal production flue gas purification according to claim 1, characterized in that: The insulated tank (1) has a dosing port (5) on one side of the top. A sealing cap is threaded to the outside of the dosing port (5). The bottom of the insulated tank (1) is a funnel-shaped structure. A drain port (6) is provided in the middle of the bottom of the insulated tank (1).

3. The waste heat recovery device for charcoal production flue gas purification according to claim 2, characterized in that: An air inlet pipe (7) is fixedly connected to one side of the heat preservation tank (1) by a bracket. One end of the air inlet pipe (7) extends to the middle of the bottom of the heat preservation tank (1). The end of the air inlet pipe (7) located in the middle of the bottom of the heat preservation tank (1) extends vertically upward and is aligned with the center of the heat preservation tank (1).

4. The waste heat recovery device for charcoal production flue gas purification according to claim 3, characterized in that: The end of the air inlet pipe (7) away from the heat preservation tank (1) is fixedly connected to a pressurizing pipe (8). The connection between the pressurizing pipe (8) and the air inlet pipe (7) is higher than the water level inside the heat preservation tank (1). The pressurizing pipe (8) is equipped with a gas pressurization component and is connected to a gas filtration device.

5. The waste heat recovery device for charcoal production flue gas purification according to claim 4, characterized in that: The air inlet pipe (7) is rotatably connected to a rotating box (9) at one end inside the heat preservation tank (1), and a rotating sealing structure is formed at the connection between the air inlet pipe (7) and the rotating box (9).

6. The waste heat recovery device for charcoal production flue gas purification according to claim 5, characterized in that: The rotating box (9) is fixedly connected to a radially distributed diversion pipe (10), and the diversion pipe (10) is fixedly connected to an equally spaced branch pipe (11). The top of the branch pipe (11) is provided with uniformly distributed exhaust holes (12), and each exhaust hole (12) is provided with a filter screen inside.

7. The waste heat recovery device for charcoal production flue gas purification according to claim 6, characterized in that: The planetary gear reduction assembly (14) is installed on the top inner side of the rotating box (9). The input end of the planetary gear reduction assembly (14) is fixedly connected to the pneumatic turbine (13), and the pneumatic turbine (13) is located inside the air intake pipe (7) to form a gas-driven transmission structure.

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