Hazardous waste incineration flue gas recirculation and filtration device

Abstract

This utility model relates to the field of flue gas treatment technology and discloses a circulating filtration device for hazardous waste incineration flue gas, including a tower body with a rotating spray mechanism inside. The rotating spray mechanism includes a water tank, a pump, and two fixing rings. The left side wall of the water tank is fixedly connected to the right bottom of the tower body, and a support plate is fixedly connected inside the water tank. The bottom wall of the pump is fixedly connected to the top of the support plate, and an inlet pipe is fixedly connected to the input end of the pump. This utility model, through its rotating spray mechanism, solves the problems of increased energy consumption, maintenance costs, and safety risks. A second connecting pipe is installed inside the externally threaded pipe, through which liquid reaches the nozzle, thereby effectively improving the removal efficiency of particulate matter, reducing the dust content in the emitted flue gas, ensuring the normal operation of the equipment, and reducing equipment maintenance costs and downtime frequency.

Description

Technical Field

[0001] This utility model relates to the field of flue gas treatment technology, and in particular to a circulating filtration device for hazardous waste incineration flue gas. Background Technology

[0002] The hazardous waste incineration flue gas recirculation filtration device is a device used to treat the flue gas generated during the incineration of hazardous waste. It aims to reduce pollutant emissions and protect the environment and human health. By introducing the flue gas generated during incineration into the recirculation system, it undergoes a series of filtration, adsorption and purification treatments to remove harmful substances such as particulate matter, acidic gases, heavy metals and organic pollutants, so that the purified flue gas meets emission standards. A portion of the purified flue gas is recirculated back to the incinerator to improve combustion efficiency and reduce energy consumption.

[0003] When treating flue gas, most spray equipment has fixed nozzles. During operation, this reduces the contact area and reaction time between the absorbent liquid and acidic gases, and prevents complete coverage. Impurities can easily form scale on the equipment surface, gradually clogging pipes, nozzles, and filter media. This reduces the equipment's flow capacity and filtration efficiency, leading to increased energy consumption, increased system resistance, shortened equipment lifespan, increased maintenance costs, and increased safety risks. During flue gas filtration, as the flue gas passes through the filter plate, some particles and impurities are effectively intercepted due to the size of the filter plate's pores. However, some impurities and particles remain uninterrupted, causing some to be discharged with the flue gas, resulting in resource waste and potential environmental pollution. This can also lead to internal corrosion, shortening the equipment's lifespan, increasing maintenance costs and safety risks, affecting the normal operation of the hazardous waste incineration system, and increasing energy consumption and operating costs. Utility Model Content

[0004] The main purpose of this utility model is to provide a hazardous waste incineration flue gas circulation filtration device, which can effectively solve the problems of increased energy consumption, increased system resistance, shortened equipment lifespan, increased maintenance costs and safety risks, as well as potential internal corrosion, which can also affect the normal operation of the hazardous waste incineration system and increase energy consumption and operating costs.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a hazardous waste incineration flue gas circulation and filtration device, including a tower body, wherein a rotating spray mechanism is provided inside the tower body;

[0006] The rotating spray mechanism includes a water tank, a pump, and two fixed rings. The left side wall of the water tank is fixedly connected to the bottom right side of the tower body. A support plate is fixedly connected inside the water tank. The bottom wall of the pump is fixedly connected to the top of the support plate. An inlet pipe is fixedly connected to the input end of the pump. A first connecting pipe is fixedly connected to the output end of the pump. A conveying pipe is connected to the left side of the middle and the top of the first connecting pipe. The outer sides of the two fixed rings are fixedly connected to the top and middle of the tower body. The left ends of the two conveying pipes are connected through the inside of the two fixed rings. Transmission pipes are connected to the front and rear sides of the two fixed rings. Internally threaded pipes are connected to the bottom walls of the multiple transmission pipes.

[0007] Furthermore, each of the internally threaded tubes has an externally threaded tube threaded to its inner bottom end, and each of the externally threaded tubes has a second connecting tube inside. Each of the second connecting tubes has a nozzle fixedly connected to its bottom end, and each nozzle has a guide groove inside.

[0008] Furthermore, a feed pipe is connected through the bottom left side of the tower body, observation windows are fixedly connected to both the upper and lower sides of the front side wall of the tower body, an exhaust pipe is connected to the top of the tower body, a waste discharge pipe is connected through the bottom left side of the tower body, and a bottom box is fixedly connected to the bottom of the tower body, with a motor installed inside the bottom box.

[0009] Furthermore, a rotating rod is fixedly connected to the output end of the motor, and a retaining ring is fixedly connected to the top end of the rotating rod through the bottom wall of the tower body. A connecting ring is fixedly connected to the outer side of the top end of the rotating rod.

[0010] Furthermore, each of the connecting rings is fixedly connected to a first support plate on its outer side, and each of the four first support plates is fixedly connected to a scraper on its bottom wall. The four scrapers are correspondingly arranged to the inner bottom wall of the tower body.

[0011] Furthermore, the tower body has threaded connections to the upper and lower sides, and filter plates are installed inside the upper and lower sides of each packing box. A transfer box is provided on the rear side of the tower body, and the two packing boxes are located at the bottom of the two fixing rings.

[0012] Furthermore, a second support plate is fixedly connected inside the transfer box, and a fan is connected through the inside of the second support plate. A duct is fixedly connected to the top outer side of the fan.

[0013] Furthermore, an air inlet pipe is connected through the top of the transfer box, the top end of which is connected through the rear top of the tower body, and an air outlet pipe is fixedly connected to the bottom of the transfer box, the bottom end of which is connected through the rear bottom of the tower body.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This utility model, through its rotating spray mechanism, solves the problems of increased energy consumption, increased system resistance, shortened equipment lifespan, increased maintenance costs, and increased safety risks. A second connecting pipe is installed inside the external threaded pipe, through which the liquid reaches the nozzle. A guide channel inside the nozzle allows the liquid to be sprayed out in a specific manner. During spraying, the water is propelled through the guide channel by the pressure released by the pump. The arc-shaped groove design of the guide channel causes the nozzle and the second connecting pipe to rotate within the external threaded pipe, thus achieving the rotating spray effect. This ensures thorough contact between the hazardous waste incineration flue gas entering the tower, effectively improving particulate matter removal efficiency, reducing dust content in the emitted flue gas, ensuring normal equipment operation, and reducing equipment maintenance costs and downtime frequency.

[0016] 2. By incorporating a packing box, filter plates, fan, inlet pipe, and outlet pipe, the system effectively addresses issues that could lead to internal corrosion, shorten the lifespan of the equipment, increase maintenance costs and safety risks, affect the normal operation of the hazardous waste incineration system, and increase energy consumption and operating costs. The packing boxes are located on both the upper and lower sides. Filter plates are installed inside the upper and lower sides of the packing boxes to further filter fine particulate matter and some harmful substances in the flue gas, improving the purification level. Inside the transfer box at the rear of the tower, the fan draws a portion of the flue gas from the top rear of the tower into the transfer box through a duct, and then transports this flue gas back to the bottom rear of the tower through the outlet pipe, achieving flue gas circulation. This effectively reduces equipment corrosion, extends the lifespan of the equipment, lowers maintenance costs and downtime frequency, and ensures the continuous and stable operation of the hazardous waste incineration system.

[0017] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the hazardous waste incineration flue gas circulation and filtration device proposed in this utility model;

[0019] Figure 2 This is an internal cross-sectional view of the hazardous waste incineration flue gas circulation and filtration device proposed in this utility model.

[0020] Figure 3 This is a structural diagram of the tray of the hazardous waste incineration flue gas circulation and filtration device proposed in this utility model;

[0021] Figure 4 This is a structural diagram of the fixed ring of the hazardous waste incineration flue gas circulation filtration device proposed in this utility model;

[0022] Figure 5 This is a structural diagram of the internal threaded pipe of the hazardous waste incineration flue gas circulation filtration device proposed in this utility model;

[0023] Figure 6 This is a schematic diagram showing the connection between the internal and external threaded pipes of the hazardous waste incineration flue gas circulation and filtration device proposed in this utility model.

[0024] Figure 7 This is a schematic diagram of the nozzle of the hazardous waste incineration flue gas circulation and filtration device proposed in this utility model;

[0025] Figure 8 This is a structural diagram of the rotating rod of the hazardous waste incineration flue gas circulation and filtration device proposed in this utility model;

[0026] Figure 9 This is a structural diagram of the transfer box of the hazardous waste incineration flue gas circulation and filtration device proposed in this utility model;

[0027] Figure 10 This is a structural diagram of the packing box of the hazardous waste incineration flue gas circulation filtration device proposed in this utility model;

[0028] Figure 11 This is a structural diagram of the filter plate of the hazardous waste incineration flue gas circulation filtration device proposed in this utility model;

[0029] Figure 12 This is a duct structure diagram of the hazardous waste incineration flue gas circulation and filtration device proposed in this utility model;

[0030] Figure 13 This is a structural diagram of the second support plate of the hazardous waste incineration flue gas circulation filtration device proposed in this utility model.

[0031] Legend:

[0032] 1. Tower body; 2. Rotary spray mechanism; 201. Water tank; 202. Support plate; 203. Pump; 204. Water inlet pipe; 205. First connecting pipe; 206. Conveying pipe; 207. Fixing ring; 208. Transmission pipe; 209. Internal threaded pipe; 210. External threaded pipe; 211. Second connecting pipe; 212. Spray head; 213. Guide channel; 3. Feed pipe; 4. Observation window; 5. Exhaust pipe; 6. Waste discharge pipe; 7. Base box; 8. Motor; 9. Rotating rod; 10. Retaining ring; 11. Connecting ring; 12. First support plate; 13. Scraper; 14. Packing box; 15. Filter plate; 16. Transfer box; 17. Second support plate; 18. Fan; 19. Conduit; 20. Air inlet pipe; 21. Air outlet pipe. Detailed Implementation

[0033] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0034] like Figure 1 - Figure 7 As shown: Hazardous waste incineration flue gas circulation and filtration device, including tower body 1, with a rotating spray mechanism 2 installed inside the tower body 1;

[0035] The rotating spray mechanism 2 includes a water tank 201, a pump 203, and two fixing rings 207. The left side wall of the water tank 201 is fixedly connected to the bottom right side of the tower body 1. Liquids for purifying flue gas are transported into the water tank 201 through external pipes for collection and storage. A support plate 202 is fixedly connected inside the water tank 201. The bottom wall of the pump 203 is fixedly connected to the top of the support plate 202, providing bottom support for the pump 203 and securing it inside the water tank 201.

[0036] The pump 203 has an inlet pipe 204 fixedly connected to its input end and a first connecting pipe 205 fixedly connected to its output end. The middle left and top of the first connecting pipe 205 are connected to a conveying pipe 206. The outer sides of two fixing rings 207 are fixedly connected to the top and middle of the tower body 1. The left ends of the two conveying pipes 206 are connected through the inside of the two fixing rings 207. The front and rear sides of the two fixing rings 207 are connected to a transmission pipe 208. The pump 203 uses the inlet pipe 204 to draw liquid from the water tank 201. The drawn liquid is then transported through the first connecting pipe 205 to the inside of the two conveying pipes 206. The two fixing rings 207 fix the two conveying pipes 206 to the top and middle of the tower body 1. The liquid inside the two conveying pipes 206 is then evenly distributed into the inside of the multiple transmission pipes 208.

[0037] The bottom walls of multiple transmission pipes 208 are all connected to internally threaded pipes 209. The bottom end of each internally threaded pipe 209 is threadedly connected to an externally threaded pipe 210. Each externally threaded pipe 210 has a second connecting pipe 211 inside. The bottom end of each second connecting pipe 211 is fixedly connected to a nozzle 212. The transmission pipes 208 are used to transport liquid to the interior of the multiple internally threaded pipes 209 at the bottom. The internally threaded pipes 209 and externally threaded pipes 210 are threadedly connected to support the second connecting pipes 211 inside the externally threaded pipes 210. After being connected to the externally threaded pipes 210, the liquid is transported to the interior of the second connecting pipes 211 and sprayed out through the nozzles 212 at the bottom end of the second connecting pipes 211 to spray the packing box 14 and flue gas at the bottom of the device.

[0038] Each nozzle 212 has a guide groove 213 inside. When water flows through the guide groove 213 inside the nozzle 212, the shape and angle of the guide groove 213 will generate a tangential force on the water flow. This tangential force gives the water flow a tendency to rotate before it exits the nozzle 212. Since the second connecting pipe 211 is fixedly connected to the nozzle 212, the rotational force generated by the water flow is transmitted to the second connecting pipe 211 through the nozzle 212, causing them to rotate together inside the external threaded pipe 210.

[0039] like Figure 1 - Figure 8 As shown, a feed pipe 3 is connected through the bottom left side of the tower body 1, through which flue gas is transported into the interior of the tower body 1 for treatment. Observation windows 4 are fixedly connected to the upper and lower sides of the front side wall of the tower body 1. An exhaust pipe 5 is connected to the top of the tower body 1, and a waste discharge pipe 6 is connected through the bottom left side of the tower body 1. The observation windows 4 allow staff to easily observe the interior of the tower body 1. After the flue gas is treated, it will be discharged from the interior of the tower body 1 through the exhaust pipe 5 at the top of the tower body 1 and transported to the next device. After the flue gas is treated, the impurities and particulate matter generated in the flue gas will be filtered out by the rotary spray mechanism 2 and the packing box 14 and fall into the interior of the tower body 1 for collection. In addition, the waste discharge pipe 6 is used to discharge the impurities, particulate matter and liquid from the interior of the tower body 1.

[0040] A base box 7 is fixedly connected to the bottom of the tower body 1. A motor 8 is installed inside the base box 7. A rotating rod 9 is fixedly connected to the output end of the motor 8. A retaining ring 10 is fixedly connected to the top of the rotating rod 9, penetrating the bottom wall of the tower body 1. A connecting ring 11 is fixedly connected to the outer side of the top of the rotating rod 9. First support plates 12 are fixedly connected to the outer sides of each of the four first support plates 12. Scrapers 13 are fixedly connected to the bottom walls of the four first support plates 12. The four scrapers 13 are correspondingly positioned to the inner bottom wall of the tower body 1. When the motor 8 inside the base box 7 is started, its output end drives the rotating rod 9 to rotate. The connecting ring 11 at the top of the rotating rod 9 rotates accordingly, and the first support plates 12 on the outer side of the connecting ring 11 also rotate. This causes the scrapers 13 fixed to the bottom walls of the first support plates 12 to rotate and scrape the inner bottom wall of the tower body 1. The scrapers 13 scrape the impurities deposited at the bottom of the tower body 1 together, facilitating their discharge through the impurity discharge pipe 6, preventing impurity accumulation from affecting the normal operation of the device.

[0041] like Figure 1 - Figure 13As shown, the tower body 1 has threaded connections to both the upper and lower sides of its interior. Each packing box 14 has filter plates 15 installed inside its upper and lower sides. The packing boxes 14 provide external support for the packing material, and the filter plates 15 and the packing material inside the packing boxes 14 filter the flue gas, improving the flue gas treatment effect. A transfer box 16 is located at the rear of the tower body 1. Both packing boxes 14 are positioned at the bottom of two fixing rings 207. By positioning the two packing boxes 14 at the bottom of the two fixing rings 207 and spraying the flue gas, the sprayed liquid will spray the packing material and filter plates 15 inside the packing boxes 14, cleaning them and improving their cleanliness, thus treating the flue gas.

[0042] A second support plate 17 is fixedly connected inside the transfer box 16. A fan 18 is connected through the second support plate 17. A duct 19 is fixedly connected to the top outer side of the fan 18. An air inlet pipe 20 is connected through the top of the transfer box 16, and the top end of the air inlet pipe 20 is connected to the rear top of the tower body 1. An air outlet pipe 21 is fixedly connected to the bottom of the transfer box 16, and the bottom end of the air outlet pipe 21 is connected to the bottom rear side of the tower body 1. The fan 18 starts through the transfer box 16 at the rear of the tower body 1. The fan 18 draws part of the flue gas from the rear top of the tower body 1 into the transfer box 16 through the duct 19, and then transports this part of the flue gas back to the bottom rear side of the tower body 1 through the air outlet pipe 21, realizing the circulation of flue gas. This allows the flue gas to pass through the rotary spray and the stuffing box filter multiple times, further improving the purification effect. After multiple purification treatments, the flue gas is finally discharged from the device through the exhaust pipe 5 at the top of the tower body 1.

[0043] It should be noted that this utility model is a hazardous waste incineration flue gas circulation and filtration device. First, the pump 203, motor 8, and fan 18 are connected to an external power supply and control terminal to supply power to the device.

[0044] A water tank 201 is installed at the bottom right side of the tower body 1. Its interior is connected to an external pipe to transport the liquid used for purifying the flue gas into the water tank 201. A support plate 202 inside the water tank 201 provides support, and a pump 203 is fixed to the support plate 202. When the device is started, the pump 203 begins operation. Its input end draws liquid from the water tank 201 through the inlet pipe 204, and the liquid drawn by the pump 203 enters the first connecting pipe 205 from its output end. The first connecting pipe 205 serves as a transfer and diversion point; its left side and top are connected to the conveying pipes 206, and the liquid is transported through the first connecting pipe 205 to the two conveying pipes 206.

[0045] The left ends of the two delivery pipes 206 are respectively connected to two fixed rings 207 at the top and middle of the tower body 1. The fixed rings 207 play a role in stabilizing and distributing the liquid in the device. After the delivery pipes 206 deliver the liquid to the fixed rings 207, the fixed rings 207 can make the liquid evenly distributed. The front and rear sides of the two fixed rings 207 are connected to the transmission pipes 208. The liquid flows from the fixed rings 207 into the transmission pipes 208, and the transmission pipes 208 further deliver the liquid to each nozzle position.

[0046] Each transmission pipe 208 has an internally threaded pipe 209 connected to its bottom wall. The internally threaded pipe 209 is threadedly connected to the externally threaded pipe 210, facilitating the installation, disassembly, and replacement of the nozzles. A second connecting pipe 211 is installed inside the externally threaded pipe 210, through which the liquid reaches the nozzle 212. A guide groove 213 inside the nozzle 212 allows the liquid to be sprayed out in a specific manner. During spraying, the pressure released by 203 propels the water through the guide groove 213. The arc-shaped groove design of the guide groove 213 causes the nozzle 212 and the second connecting pipe 211 to rotate within the externally threaded pipe 210, achieving a rotating spray effect. The liquid fully contacts the hazardous waste incineration flue gas entering the tower body 1, adsorbing particulate matter, acidic gases, and other harmful substances in the flue gas, thus purifying and filtering the flue gas.

[0047] The motor 8 inside the bottom box 7 starts, and its output drives the rotating rod 9 to rotate. The connecting ring 11 at the top of the rotating rod 9 rotates accordingly, and the first support plate 12 on the outside of the connecting ring 11 also rotates, thereby causing the scraper 13 fixed to the bottom wall of the first support plate 12 to rotate and scrape the bottom wall inside the tower body 1. The scraper 13 scrapes the impurities deposited at the bottom of the tower body together, making it easier to discharge the impurities from the tower body through the impurity discharge pipe 6, preventing the accumulation of impurities from affecting the normal operation of the device.

[0048] The flue gas, initially purified by the rotary spray, continues to rise, passing through the upper and lower packing boxes 14. Filter plates 15 are installed inside the upper and lower sides of the packing boxes 14, further filtering fine particulate matter and some harmful substances from the flue gas, improving the purification level. Inside the transfer box 16 at the rear of the tower body 1, the fan 18 starts. The fan 18 draws a portion of the flue gas from the rear top of the tower body 1 into the transfer box 16 through the duct 19, and then transports this portion of flue gas back to the bottom rear of the tower body 1 through the exhaust pipe 21, achieving flue gas circulation. This allows the flue gas to pass through the rotary spray and packing box filtration multiple times, further improving the purification effect. After multiple purification processes, the flue gas is finally discharged into the atmosphere through the exhaust pipe 5 at the top of the tower body 1, meeting environmental emission standards.

[0049] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A hazardous waste incineration flue gas circulating filter device comprising a tower body (1), characterized in that: The tower body (1) is equipped with a rotating spray mechanism (2). The rotating spray mechanism (2) includes: a water tank (201), a pump (203), and two fixing rings (207). The left side wall of the water tank (201) is fixedly connected to the bottom right side of the tower body (1). A support plate (202) is fixedly connected inside the water tank (201). The bottom wall of the pump (203) is fixedly connected to the top of the support plate (202). An inlet pipe (204) is fixedly connected to the input end of the pump (203). A first connecting pipe is fixedly connected to the output end of the pump (203). (205), the middle left and top of the first connecting pipe (205) are connected to a conveying pipe (206), the outer sides of the two fixed rings (207) are fixedly connected to the top and middle of the tower body (1), the left ends of the two conveying pipes (206) are connected through the inside of the two fixed rings (207), the front and rear sides of the two fixed rings (207) are connected to a transmission pipe (208), and the bottom walls of the multiple transmission pipes (208) are connected to an internal threaded pipe (209).

2. The hazardous waste incineration flue gas circulating filter device according to claim 1, characterized in that: Each of the internally threaded tubes (209) has an externally threaded tube (210) threaded to its bottom end. Each of the externally threaded tubes (210) has a second connecting tube (211) inside. Each of the second connecting tubes (211) has a nozzle (212) fixedly connected to its bottom end. Each nozzle (212) has a guide groove (213) inside.

3. The hazardous waste incineration flue gas circulating filter apparatus according to claim 1, characterized by: A feed pipe (3) is connected through the bottom left side of the tower body (1). Observation windows (4) are fixedly connected to the upper and lower sides of the front side wall of the tower body (1). An exhaust pipe (5) is connected to the top of the tower body (1). A waste discharge pipe (6) is connected through the bottom left side of the tower body (1). A bottom box (7) is fixedly connected to the bottom of the tower body (1). A motor (8) is installed inside the bottom box (7).

4. The hazardous waste incineration flue gas circulating filter apparatus according to claim 3, characterized by: The output end of the motor (8) is fixedly connected to a rotating rod (9), and the top end of the rotating rod (9) is fixedly connected to a retaining ring (10) through the bottom wall of the tower body (1), and a connecting ring (11) is fixedly connected to the outer side of the top end of the rotating rod (9).

5. The hazardous waste incineration flue gas circulating filter apparatus according to claim 4, characterized by: The outer side of each connecting ring (11) is fixedly connected to a first support plate (12), and the bottom wall of each of the four first support plates (12) is fixedly connected to a scraper (13). The four scrapers (13) are correspondingly arranged with the inner bottom wall of the tower body (1).

6. The hazardous waste incineration flue gas circulating filter apparatus according to claim 1, characterized by: The tower body (1) has a stuffing box (14) threadedly connected to both the upper and lower sides inside. Each stuffing box (14) has a filter plate (15) installed inside both the upper and lower sides. A transfer box (16) is provided on the rear side of the tower body (1). Both stuffing boxes (14) are located at the bottom of two fixing rings (207).

7. The hazardous waste incineration flue gas circulating filter apparatus according to claim 6, characterized by: The transfer box (16) is fixedly connected to a second support plate (17), and a fan (18) is connected through the inside of the second support plate (17). A duct (19) is fixedly connected to the top outer side of the fan (18).

8. The hazardous waste incineration flue gas circulating filter apparatus according to claim 7, characterized by: An air inlet pipe (20) is connected to the top of the transfer box (16), and the top end of the air inlet pipe (20) is connected to the rear side of the top of the tower body (1). An air outlet pipe (21) is fixedly connected to the bottom of the transfer box (16), and the bottom end of the air outlet pipe (21) is connected to the bottom of the rear side of the tower body (1).

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