Flue gas heat exchange treatment device for preventing flue blockage and molten furnace system

Abstract

The utility model relates to the field of ash dangerous waste environmental protection treatment technology, concretely relates to a kind of flue gas heat exchange treatment device and melting furnace system for preventing flue blockage, comprising: including heat exchange component and dust cleaner. Among them, heat exchange component has: heat exchange feed inlet, for inputing to be melted low-temperature material into heat exchange component;Heat exchange discharge port, for being connected with the furnace body feed inlet on melting furnace, to be melted high-temperature material is inputted to melting furnace;Heat exchange air inlet, for being connected with the furnace body air outlet on melting furnace, to absorb high-temperature flue gas in melting furnace;Heat exchange air outlet, upwardly extending heat exchange air outlet pipe is connected on it, for discharging low-temperature flue gas to flue. Dust cleaner is installed in heat exchange air outlet pipe, for removing the flue gas ash and slag condensed in heat exchange air outlet pipe, and make ash and slag fall back to heat exchange component.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection treatment technology for ash and hazardous waste, specifically to a flue gas heat exchange treatment device and melting furnace system for preventing flue blockage. Background Technology

[0002] The melting method for treating ash-type hazardous waste allows for the resource utilization of the molten glassy material, making it an effective measure to turn waste into treasure. The melting method for treating ash-type hazardous waste has the following advantages: 1. Small footprint; 2. Minimal amount of secondary hazardous waste generated; 3. The resulting glassy material is no longer hazardous waste, possesses long-term stability, and can be used as abrasives, filter materials, roadbed materials, etc.; 4. Valuable metals in the hazardous waste are recycled; 5. Low-carbon and environmentally friendly.

[0003] In actual operation, the high energy consumption of the melting method often limits its widespread adoption. Furthermore, because the temperature inside the melting furnace is generally above 1500°C, the discharged high-temperature exhaust gas contains vaporized elements such as Na, K, Cl, S, P, and Zn, as well as entrained components such as CaO, SiO2, Al2O3, and Fe2O3. These substances form high-viscosity droplets at high temperatures, with a condensation temperature of approximately 700°C-1000°C. As they are discharged through the flue, they condense inside the flue and gradually accumulate, eventually clogging it and affecting operation. Utility Model Content

[0004] 1. The problem to be solved In view of the problems of high energy consumption and easy clogging of flue in the existing technology of using melting to treat ash and slag hazardous waste, this utility model provides a flue gas heat exchange treatment device and melting furnace system to prevent flue blockage, which can reduce energy consumption and prevent flue blockage.

[0005] 2. Technical Solution To solve the above problems, the technical solution adopted by this utility model is as follows: The first aspect of this utility model provides a flue gas heat exchange treatment device for preventing flue blockage, including a heat exchange component and a soot remover; The heat exchange components include: The heat exchange feed inlet is used to input the low-temperature material to be melted into the heat exchange assembly; The heat exchange outlet is used to connect to the furnace body inlet on the melting furnace to feed the high-temperature material to be melted into the melting furnace; The heat exchange inlet is used to connect to the furnace outlet on the melting furnace to draw in the high-temperature flue gas inside the melting furnace. The heat exchange outlet is connected to an upward-extending heat exchange outlet pipe for discharging low-temperature flue gas into the flue. The soot remover is installed in the heat exchange outlet pipe to remove the condensed flue gas ash and slag inside the heat exchange outlet pipe and allow the ash and slag to fall back into the heat exchange components.

[0006] As a preferred embodiment of this utility model, the soot remover includes a rotating part and a soot removal part, with the soot removal part fixedly arranged circumferentially on the rotating part; wherein, the rotating part is used to drive the soot removal part to rotate synchronously, so as to remove the flue gas ash condensed on the inner wall of the heat exchange outlet.

[0007] As a preferred embodiment of this utility model, it also includes a cooling component for reducing the temperature of the flue gas flowing through the heat exchange outlet pipe.

[0008] As a preferred embodiment of this utility model, the cooling assembly includes an internal cooling structure and / or an external cooling structure, wherein the internal cooling structure is disposed inside the ash cleaner and the external cooling structure is disposed outside the heat exchange outlet pipe.

[0009] As a preferred embodiment of this utility model, the internal cooling structure includes a cooling cavity disposed within the ash cleaner, and a cooling medium inlet and a cooling medium outlet communicating with the cooling cavity are provided on the rotating part.

[0010] As a preferred embodiment of this utility model, both the rotating part and the dust removal part are equipped with cooling chambers, and the cooling chambers are interconnected.

[0011] As a preferred embodiment of this utility model, the external cooling structure includes a cooling pipe surrounding the heat exchange outlet pipe.

[0012] As a preferred embodiment of this utility model, the heat exchange outlet pipe is configured as a vertical pipe.

[0013] As a preferred embodiment of this utility model, the heat exchange assembly includes a cyclone preheater and a gas-material conveying pipeline with three ports. The discharge port at the lower end of the cyclone preheater is the heat exchange discharge port, and the air outlet at the upper end of the cyclone preheater is the heat exchange air outlet. One end of the gas-material conveying pipeline is connected to the tangential inlet of the cyclone preheater, and the other two ports are the heat exchange air inlet and the heat exchange feed inlet, respectively.

[0014] As a preferred embodiment of this utility model, the heat exchange assembly includes multiple cyclone preheaters and multiple gas-material conveying pipes, each gas-material conveying pipe having three ports; The tangential inlet of each stage of the cyclone preheater is connected to the outlet of the previous stage of the cyclone preheater and the outlet of the next stage of the cyclone preheater through the same stage's gas and material conveying pipeline. in: The discharge port at the bottom of the last stage cyclone preheater is the heat exchange discharge port, and the air outlet at the top of the first stage cyclone preheater is the heat exchange air outlet. One end of the last stage gas-material conveying pipeline is the heat exchange air inlet, and the other two ends are connected to the tangential inlet of the last stage cyclone preheater and the outlet of the previous stage cyclone preheater, respectively. One end of the first-stage gas-material conveying pipeline is the heat exchange feed inlet, and the other two ends are connected to the tangential inlet of the first-stage cyclone preheater and the air outlet of the next-stage cyclone preheater, respectively.

[0015] The second aspect of this utility model provides a melting furnace system, including a melting furnace, a flue, and the aforementioned flue gas heat exchange treatment device; wherein, the flue is connected to a heat exchange outlet pipe, and the furnace body of the melting furnace is provided with a furnace body inlet connected to a heat exchange outlet and a furnace body outlet connected to a heat exchange outlet.

[0016] As a preferred embodiment of this utility model, a graphite electrode is provided inside the furnace body. The distance between the furnace body feed port and the graphite electrode is smaller than the distance between the furnace body exhaust port and the graphite electrode, so that the material can be rapidly melted by the plasma generated by the graphite electrode and the amount of dust drawn into the furnace body exhaust port is reduced.

[0017] As a preferred embodiment of this utility model, the graphite electrode is disposed in the middle of the furnace body, and multiple furnace body feed ports are provided. The multiple furnace body feed ports are evenly arranged around the graphite electrode, and the distance between each furnace body feed port and the graphite electrode is equal. The furnace body has multiple air outlets, which are evenly arranged around the graphite electrode, and the distance between each air outlet and the graphite electrode is equal.

[0018] 3. Beneficial effects Compared with the prior art, the beneficial effects of this utility model are as follows: (1) This utility model enables the material to be melted to exchange heat fully with the high-temperature flue gas discharged from the melting furnace through the heat exchange component. On the one hand, it increases the temperature of the material to be melted and reduces the energy consumption of the melting furnace; on the other hand, it reduces the temperature of the flue gas. The liquid flue gas ash reaches the condensation temperature at the heat exchange outlet pipe and condenses in advance in the heat exchange outlet pipe, avoiding condensation in the flue and blockage of the flue.

[0019] (2) This utility model can remove the condensed flue gas ash in the heat exchange outlet pipe by installing a ash remover in the heat exchange outlet pipe. The fallen flue gas ash will enter the melting furnace again through the heat exchange components, which avoids blockage of the heat exchange outlet pipe on the one hand, and makes full use of resources on the other hand.

[0020] (3) By setting a cooling component at the position of the heat exchange outlet pipe, this utility model can quickly reduce the temperature of the flue gas flowing through the heat exchange outlet pipe, so that the temperature of the flue gas drops rapidly to below the condensation temperature range, so that the liquid flue gas ash can be fully condensed in the heat exchange outlet pipe, and the flow of flue gas ash into the flue can be minimized. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the melting furnace system in this utility model. In the figure, the blue arrows indicate the direction of flue gas flow, and the red arrows indicate the direction of material flow. Figure 2 This is a schematic diagram showing the distribution of multiple furnace body feed inlets and furnace body exhaust outlets on the furnace body in this utility model; Figure 3 This is a schematic diagram of the structure of the soot remover and cooling components in this utility model; Figure 4 This is a schematic diagram of the external cooling structure in this utility model; Figure 5 This is a schematic diagram of the internal cooling structure in this utility model.

[0022] Explanation of the labels in the diagram: 100. Melting furnace; 110. Furnace body; 120. Graphite electrode; 130. Furnace body feed inlet; 140. Furnace body exhaust outlet; 150. Molten glass; 160. Molten alloy; 170. Plasma; 200, Heat exchanger assembly; 210, Heat exchanger feed inlet; 220, Heat exchanger discharge outlet; 230, Heat exchanger air inlet; 240, Heat exchanger air outlet; 250, Cyclone preheater; 260, Air-material conveying pipeline; 270, Rotary star feed valve; 280, Tangential inlet; 290, Heat exchanger air outlet pipe; 300. Ash remover; 310. Rotating part; 320. Ash removal part; 400. Cooling assembly; 410. Internal cooling structure; 411. Cooling medium inlet; 412. Cooling medium outlet; 413. Input pipe; 414. Output pipe; 420. External cooling structure; 500. Flue. Detailed Implementation

[0023] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.

[0024] The structures, proportions, and sizes illustrated in the accompanying drawings are solely for illustrative purposes and to aid those skilled in the art in understanding and reading the invention. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of implementation. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0025] Example 1 This embodiment provides a flue gas heat exchange treatment device to prevent flue blockage, such as... Figure 1 As shown, the flue gas heat exchange treatment device includes a heat exchange component 200 and a soot remover 300.

[0026] The heat exchange assembly 200 is installed on the melting furnace 100. The heat exchange assembly 200 has a heat exchange feed port 210, a heat exchange discharge port 220, a heat exchange air inlet 230, a heat exchange air outlet 240, and a heat exchange air outlet pipe 290.

[0027] The heat exchange feed inlet 210 is used to input the low-temperature material to be melted into the heat exchange component 200; the heat exchange discharge outlet 220 is connected to the furnace body feed inlet 130 on the melting furnace 100 and is used to feed the high-temperature material to be melted into the melting furnace 100; the heat exchange air inlet 230 is connected to the furnace body air outlet 140 on the melting furnace 100 and is used to draw in the high-temperature flue gas in the melting furnace 100; the heat exchange air outlet 240 is connected to an upwardly extending heat exchange air outlet pipe 290 and is used to discharge low-temperature flue gas into the flue 500.

[0028] After the low-temperature material to be melted enters the heat exchange component 200 through the heat exchange feed port 210, it can exchange heat with the high-temperature flue gas that enters the heat exchange component 200 through the heat exchange air inlet 230.

[0029] After heat exchange, the temperature of the low-temperature material to be melted rises, becoming a high-temperature material to be melted, and enters the melting furnace 100 from the heat exchange outlet 220. The material to be melted is heated by the waste heat of the high-temperature flue gas, which can save the heat required for the melting furnace 100 to process the material and reduce energy consumption.

[0030] After heat exchange, the temperature of the high-temperature flue gas decreases and enters the flue 500 through the heat exchange outlet 240 and the heat exchange outlet pipe 290. Through heat exchange between the material to be melted and the high-temperature flue gas, the temperature of the high-temperature flue gas decreases rapidly, reaching the condensation temperature of liquid flue gas ash at the heat exchange outlet pipe 290. At this time, the liquid flue gas ash carried in the flue gas cools down and condenses in the heat exchange outlet pipe 290, which can prevent the liquid flue gas ash from condensing in the flue 500 and avoid blockage of the flue 500.

[0031] The soot remover 300 is installed in the heat exchange outlet pipe 290 to remove the condensed flue gas ash in the heat exchange outlet pipe 290. Since the heat exchange outlet pipe 290 extends upward and the removed condensed ash has a certain weight, the ash will fall back into the heat exchange component 200 along the heat exchange outlet pipe 290. The ash that falls into the heat exchange component 200 will enter the melting furnace 100 together with the ash and hazardous waste coming in through the heat exchange feed inlet 210. This avoids clogging of the heat exchange outlet pipe 290 and makes full use of resources.

[0032] In summary, this embodiment uses the heat exchange component 200 to fully exchange heat between the material to be melted and the high-temperature flue gas discharged from the melting furnace 100. On the one hand, this increases the temperature of the material to be melted and reduces the energy consumption of the melting furnace 100; on the other hand, it lowers the flue gas temperature, so that the liquid flue gas ash reaches the condensation temperature in the heat exchange outlet pipe 290 and condenses in the heat exchange outlet pipe 290 in advance, avoiding blockage of the flue 500 after condensation in the flue 500.

[0033] In this embodiment, a soot remover 300 is also installed in the heat exchange outlet pipe 290, which can remove the condensed flue gas ash in the heat exchange outlet pipe 290. The fallen flue gas ash will enter the melting furnace 100 through the heat exchange component 200, which avoids blockage of the heat exchange outlet pipe 290 and makes full use of resources.

[0034] In this embodiment, the heat exchange outlet pipe 290 has a small diameter, which facilitates the installation of the soot remover 300. Simultaneously, the length of the heat exchange outlet pipe 290 is suitable, resulting in a high concentration of flue gas ash condensation, making it easy for the soot remover 300 to clean it. However, the flue duct 500 has a large diameter, and the flue gas cools down slowly within it. The path of the flue duct 500 with condensed flue gas ash is long, making it difficult to clean. Furthermore, the cleaned flue gas ash is not easily removed.

[0035] In one embodiment, the heat exchange outlet pipe 290 is configured as a vertical pipe coaxial with the heat exchange outlet 240, which not only facilitates the installation of the dust remover 300, but also makes it easier for the scraped-off ash to fall downwards into the heat exchange chamber of the heat exchange assembly 200.

[0036] In one embodiment, although a star-shaped feed valve 270 is installed on the heat exchange feed port 210 to prevent flue gas from escaping from the heat exchange feed port 210 into the feed system connected to the heat exchange feed port 210.

[0037] Example 2 Based on Embodiment 1, Embodiment 2 provides a specific implementation of the soot remover 300, such as... Figure 1 and Figure 3 As shown.

[0038] The soot remover 300 includes a rotating part 310 and a soot removal part 320. The soot removal part 320 is circumferentially fixed on the rotating part 310. The rotating part 310 can be configured as a rotating shaft, and the soot removal part 320 can be configured as a soot removal plate. The motor that drives the rotating part 310 to rotate is located outside the heat exchange outlet pipe 290. Optionally, a gear is fitted around the rotating part 310, and a gear is also connected to the rotating shaft of the motor. The two gears mesh so that the motor can drive the rotating part 310 to rotate inside the heat exchange outlet pipe 290.

[0039] The cleaning section 320 can rotate synchronously with the rotating section 310. When the cleaning section 320 rotates, it can scrape off the flue gas ash condensed on the inner wall of the heat exchange outlet pipe 290. The scraped flue gas ash condensed will fall back into the heat exchange assembly 200 and enter the melting furnace 100 together with the ash condensate entering through the heat exchange feed inlet 210.

[0040] Example 3 Based on the above embodiments, such as Figure 3 and Figure 4 As shown, this embodiment provides a cooling component 400 to reduce the temperature of the flue gas flowing through the heat exchange outlet pipe 290, causing the flue gas temperature to drop rapidly below the condensation temperature range. This allows the liquid flue gas ash to fully condense within the heat exchange outlet pipe 290, minimizing the amount of flue gas ash flowing into the flue duct 500. For example, if the condensation temperature of the liquid flue gas ash is 700℃-1000℃, the cooling component 400 can ensure that the flue gas temperature drops below 700℃ when flowing through the heat exchange outlet pipe 290.

[0041] In one embodiment, the cooling assembly 400 includes an inner cooling structure 410 and / or an outer cooling structure 420, wherein the inner cooling structure 410 is disposed inside the soot remover 300 and the outer cooling structure 420 is disposed outside the heat exchange outlet pipe 290.

[0042] In practice, you can choose to configure only the internal cooling structure 410 or the external cooling structure 420, or configure both the internal cooling structure 410 and the external cooling structure 420 at the same time for dual cooling, which will result in higher flue gas cooling efficiency.

[0043] In one embodiment, the internal cooling structure 410 includes a cooling cavity disposed within the soot remover 300. The rotating part 310 is provided with a cooling medium inlet 411 and a cooling medium outlet 412 communicating with the cooling cavity. The cooling medium can be liquid or gas.

[0044] In one embodiment, the cooling medium inlet 411 and the cooling medium outlet 412 are located in the portion of the rotating part 310 outside the heat exchange outlet pipe 290.

[0045] Optionally, such as Figure 3 As shown, the cooling medium inlet 411 is located on the axis of the rotating part 310, and the cooling medium input pipe is rotatably connected to the cooling medium inlet 411 to prevent the input pipe from twisting due to the rotation of the rotating part 310; the cooling medium outlet 412 can be located at any position of the rotating part 310 outside the heat exchange outlet pipe 290.

[0046] Optionally, such as Figure 5 As shown, the cooling medium inlet 411 and the cooling medium outlet 412 are set as the same inlet and outlet. The cooling medium input pipe 413 and the output pipe 414 are coaxially arranged sleeves. The output pipe 414 is sleeved outside the input pipe 413, and the end of the output pipe 414 is rotatably connected to the cooling medium outlet 412. There is a gap between the input pipe 413 and the cooling medium outlet 412 for the cooling medium to flow back to the output pipe. The end of the input pipe 413 extends into the bottom of the rotating part 310. The cooling medium flows from the bottom of the rotating part 310 to the top and flows back to the cooling system through the gap and the output pipe 414.

[0047] In one embodiment, both the rotating part 310 and the dust removal part 320 are equipped with cooling chambers, and the cooling chambers are interconnected to expand the cooling area and improve the cooling effect.

[0048] In one embodiment, the external cooling structure 420 includes a cooling pipe surrounding the heat exchange outlet pipe 290. Preferably, the cooling pipe is spirally wrapped around the outer wall of the heat exchange outlet pipe 290, and a liquid or gaseous cooling medium is introduced into the cooling pipe.

[0049] Example 4 Based on the above embodiments, Embodiment 4 provides two implementation methods for the heat exchange component 200.

[0050] First implementation method: The heat exchange assembly 200 includes a cyclone preheater 250 and a gas-material conveying pipe 260, which has three ports. The lower outlet of the cyclone preheater 250 is the heat exchange outlet 220, which is connected to the furnace body inlet 130 on the furnace body 110. The upper outlet of the cyclone preheater 250 is the heat exchange outlet 240, which is connected to the flue 500. One end of the gas-material conveying pipe 260 is connected to the tangential inlet 280 of the cyclone preheater 250, and the other two ports are the heat exchange inlet 230 and the heat exchange feed inlet 210, respectively. The heat exchange inlet 230 is connected to the furnace body outlet 140.

[0051] Second implementation method: The tangential inlet 280 of each stage of the cyclone preheater 250 is connected to the outlet of the previous stage of the cyclone preheater 250 and the outlet of the next stage of the cyclone preheater 250 through the same stage's gas and material conveying pipeline 260. in: The discharge port at the lower end of the last-stage cyclone preheater 250 is the heat exchange discharge port 220, and the air outlet at the upper end of the first-stage cyclone preheater 250 is the heat exchange air outlet 240. One end of the last stage gas-material conveying pipeline 260 is a heat exchange air inlet 230, and the other two ends are connected to the tangential inlet 280 of the last stage cyclone preheater 250 and the outlet of the previous stage cyclone preheater 250, respectively. One end of the first-stage gas-material conveying pipeline 260 is a heat exchange inlet 210, and the other two ends are connected to the tangential inlet 280 of the first-stage cyclone preheater 250 and the outlet of the next-stage cyclone preheater 250, respectively.

[0052] The second implementation method will be specifically illustrated below through two examples.

[0053] Example 1, as shown in Figure 1, takes a two-stage cyclone preheater 250 and a two-stage gas-material conveying pipeline 260 as an example: The discharge port at the lower end of the second-stage cyclone preheater 250 is the heat exchange discharge port 220, and the air outlet at the upper end of the first-stage cyclone preheater 250 is the heat exchange air outlet 240. One end of the second-stage gas-material conveying pipeline 260 is a heat exchange inlet 230, and the other two ends are connected to the tangential inlet 280 of the second-stage cyclone preheater 250 and the outlet of the first-stage cyclone preheater 250, respectively. One end of the first-stage gas-material conveying pipeline 260 is a heat exchange inlet 210, and the other two ends are connected to the tangential inlet 280 of the first-stage cyclone preheater 250 and the outlet of the second-stage cyclone preheater 250, respectively.

[0054] Example 2, taking a three-stage cyclone preheater 250 and a two-stage gas-material conveying pipeline 260 as an example: The discharge port at the lower end of the third-stage cyclone preheater 250 is the heat exchange discharge port 220, and the air outlet at the upper end of the first-stage cyclone preheater 250 is the heat exchange air outlet 240. One end of the third-stage gas-material conveying pipeline 260 is a heat exchange inlet 230, and the other two ends are connected to the tangential inlet 280 of the third-stage cyclone preheater 250 and the outlet of the second-stage cyclone preheater 250, respectively. One end of the first-stage gas-material conveying pipeline 260 is a heat exchange inlet 210, and the other two ends are connected to the tangential inlet 280 of the first-stage cyclone preheater 250 and the outlet of the second-stage cyclone preheater 250, respectively.

[0055] The tangential inlet 280 of the second-stage cyclone preheater 250 is connected to the outlet of the first-stage cyclone preheater 250 and the outlet of the third-stage cyclone preheater 250 through the second-stage gas-material conveying pipe 260.

[0056] It should be noted that the material entering through the heat exchanger inlet 210 will not flow along the gas-material conveying pipe 260 to the heat exchanger air inlet 230. The reason is as follows: Taking a cyclone preheater 250 and a gas-material conveying pipe 260 as an example, due to the strong suction from the flue 500, it can remove 1000 Nm³ per hour. 3 The gas flow rate at the tangential inlet 280 and the heat exchange outlet 240 is typically 10 m / s. This flow rate ensures that the cyclone preheater 250 is in good working condition. Material from the heat exchange feed inlet 210 will be promptly drawn into the tangential inlet 280 and will not flow along the gas-material conveying pipe 260 to the heat exchange feed inlet 230.

[0057] It should also be noted that the sorting method of the first and last levels is based on the melting furnace 100. The level closest to the melting furnace 100 is the last level, and the level farthest from the melting furnace 100 is the first level.

[0058] Example 5 Example 5 provides a melting furnace system, which, based on the above examples, further includes a melting furnace 100 and a flue 500, such as... Figure 1 and Figure 2 As shown.

[0059] in: The melting furnace 100 includes a furnace body 110 and a graphite electrode 120. When the graphite electrode 120 is energized, it can generate plasma 170. After the ash and hazardous waste is melted, it will separate into layers: the upper layer is molten glass 150, and the lower layer is molten alloy 160. The furnace body 110 is provided with a furnace inlet 130 for connection to the heat exchange outlet 220, and a furnace outlet 140 for connection to the heat exchange outlet 240.

[0060] One end of the flue 500 is connected to the heat exchange outlet pipe 290, and the other end is connected to the combustion chamber. A large induced draft fan is connected downstream of the combustion chamber, which can ensure that the pressure of the heat exchange outlet 240 is lower than -400Pa. The air pressure of the heat exchange outlet 240 is much lower than -5 to -50Pa in the melting furnace 100, ensuring that the high-temperature flue gas in the melting furnace 100 can flow stably from the heat exchange inlet 230 to the heat exchange outlet 240.

[0061] In one embodiment, the distance between the furnace body feed port 130 and the graphite electrode 120 is smaller than the distance between the furnace body exhaust port 140 and the graphite electrode 120 (this distance refers to the horizontal distance), so that the material is rapidly melted by the plasma 170 after falling onto the surface of the molten liquid, thereby increasing the melting efficiency and reducing the amount of dust drawn into the furnace body exhaust port 140.

[0062] In one embodiment, the graphite electrode 120 is disposed in the middle of the furnace body 110, and multiple furnace body feed ports 130 are provided. Each of the multiple furnace body feed ports 130 is connected to the heat exchange discharge port 220. The multiple furnace body feed ports 130 are evenly arranged around the graphite electrode 120, and the distance between each furnace body feed port 130 and the graphite electrode 120 is equal, so that the ash and slag fed into the melting furnace 100 by each furnace body feed port 130 are melted with equal efficiency.

[0063] Under the above conditions, the ash and slag fed into the melting furnace 100 through each furnace inlet 130 are melted with equal efficiency, and the flue gas and ash and slag are evenly distributed around the graphite electrode 120; multiple furnace outlets 140 are provided, and each furnace outlet 140 is connected to the heat exchange inlet 230. The multiple furnace outlets 140 are evenly arranged around the graphite electrode 120, and the distance between each furnace outlet 140 and the graphite electrode 120 is equal, so that the amount of flue gas drawn into each furnace outlet 140 is equal.

[0064] It should be noted that although both the furnace body outlet 140 and the furnace body feed inlet 130 are connected to the melting furnace 100, the furnace body feed inlet 130 is under positive pressure and is continuously supplied with nitrogen. Furthermore, about 80% of the space of the feed spiral of the furnace body feed inlet 130 is occupied by material, and the pressure in the combustion chamber is a negative pressure that is lower than the pressure in the furnace body 110. In addition, the flue 500 leading to the combustion chamber has a large diameter. Therefore, the flue gas will not enter the heat exchange component 200 from the furnace body feed inlet 130.

[0065] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A flue gas heat exchange treatment device for preventing flue blockage, characterized in that: Includes heat exchange components (200) and a soot remover (300); The heat exchange assembly (200) has the following features: The heat exchange inlet (210) is used to input the low-temperature material to be melted into the heat exchange assembly (200); The heat exchange outlet (220) is used to connect to the furnace body inlet (130) on the melting furnace (100) to feed the high-temperature material to be melted into the melting furnace (100); The heat exchange inlet (230) is used to connect to the furnace body outlet (140) on the melting furnace (100) to draw in the high-temperature flue gas inside the melting furnace (100); A heat exchange outlet (240) is connected to an upwardly extending heat exchange outlet pipe (290) for discharging low-temperature flue gas into the flue (500); The soot remover (300) is installed in the heat exchange outlet pipe (290) and is used to remove the condensed flue gas ash inside the heat exchange outlet pipe (290).

2. The flue gas heat exchange treatment device for preventing flue blockage according to claim 1, characterized in that: The dust cleaner (300) includes a rotating part (310) and a dust cleaning part (320), with the dust cleaning part (320) fixedly disposed in the circumferential direction of the rotating part (310); The rotating part (310) is used to drive the cleaning part (320) to rotate synchronously to remove the flue gas ash condensed on the inner wall of the heat exchange outlet pipe (290).

3. The flue gas heat exchange treatment device for preventing flue blockage according to claim 2, characterized in that: It also includes a cooling assembly (400) for reducing the temperature of the flue gas flowing through the heat exchange outlet pipe (290).

4. The flue gas heat exchange treatment device for preventing flue blockage according to claim 3, characterized in that: The cooling assembly (400) includes an internal cooling structure (410) and / or an external cooling structure (420), wherein the internal cooling structure (410) is disposed inside the soot remover (300) and the external cooling structure (420) is disposed outside the heat exchange outlet pipe (290).

5. The flue gas heat exchange treatment device for preventing flue blockage according to claim 4, characterized in that: The internal cooling structure (410) includes a cooling cavity disposed in the soot remover (300), and the rotating part (310) is provided with a cooling medium inlet (411) and a cooling medium outlet (412) communicating with the cooling cavity.

6. The flue gas heat exchange treatment device for preventing flue blockage according to claim 5, characterized in that: Both the rotating part (310) and the dust removal part (320) are equipped with cooling chambers, and the cooling chambers are interconnected.

7. The flue gas heat exchange treatment device for preventing flue blockage according to claim 5, characterized in that: The external cooling structure (420) includes cooling pipes surrounding the heat exchange outlet pipe (290).

8. A melting furnace system, characterized in that: The device includes a melting furnace (100), a flue (500), and a flue gas heat exchange treatment device according to any one of claims 1-7, wherein the flue (500) is connected to the heat exchange outlet pipe (290), and the furnace body (110) of the melting furnace (100) is provided with a furnace body inlet (130) connected to the heat exchange outlet (220) and a furnace body outlet (140) connected to the heat exchange outlet (240).

9. The melting furnace system according to claim 8, characterized in that: A graphite electrode (120) is provided inside the furnace body (110), and the distance between the furnace body feed port (130) and the graphite electrode (120) is smaller than the distance between the furnace body exhaust port (140) and the graphite electrode (120), so that the material can be rapidly melted by the plasma (170) generated by the graphite electrode (120) and the amount of dust drawn into the furnace body exhaust port (140) is reduced.

10. The melting furnace system according to claim 9, characterized in that: The graphite electrode (120) is located in the middle of the furnace body (110). There are multiple furnace body feed ports (130), which are evenly arranged around the graphite electrode (120). The distance between each furnace body feed port (130) and the graphite electrode (120) is equal. The furnace body has multiple air outlets (140), which are evenly arranged around the graphite electrode (120), and the distance between each air outlet (140) and the graphite electrode (120) is equal.

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