Sintering cooler low-temperature tail gas waste heat power generation flue gas device

Abstract

The utility model relates to the technical field of sintering tail gas waste heat power generation, in particular to a sintering cooler low-temperature tail gas waste heat power generation flue gas device which comprises a waste heat boiler, the input end of the waste heat boiler is connected with a pretreatment assembly, and the input end of the pretreatment assembly is communicated with a sintering cooler low-temperature tail gas exhaust pipeline. The pretreatment assembly comprises a pretreatment box, an air inlet cover, an air inlet channel, two flow guide plates, two mounting frames, two adsorbents and an input pipe, the output end of the waste heat boiler is connected with a pressurization assembly, the pressurization assembly comprises an output pipe, an air storage tank, a pressure gauge, a steam channel and a pressure valve, and the output end of the pressurization assembly is connected with a driving assembly. Impurities in tail gas can be filtered and treated, the influence on follow-up equipment is avoided, and the heat utilization rate is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat power generation from sintering tail gas, in particular to a flue gas device for waste heat power generation from low-temperature tail gas of a sintering cooler. Background Technique

[0002] In China, the sintering process accounts for about 10%-15% of the total energy consumption of iron and steel enterprises. Among them, about 50% of the heat energy is discharged in the form of sensible heat with sintering flue gas and cooler waste gas. The temperature of the sintered ore entering the cooler is between 700°C and 800°C, and the available waste gas temperature is between 250°C and 500°C. The waste gas of the sintering cooler belongs to medium and low-temperature heat sources, and its waste heat utilization usually generates steam or conducts waste heat power generation. A waste heat utilization device for sintering cooler waste gas with intermediate reheating proposed in the prior art with the publication number CN217504388U includes a cooler waste heat boiler, a steam turbine, and a generator. The cooler waste heat boiler includes a high-parameter boiler and a low-parameter boiler. A reheater is provided in the high-parameter boiler. The steam turbine includes a high-parameter section and a low-parameter section of the steam turbine. The high-parameter superheated steam outlet of the high-parameter boiler is connected to the steam inlet of the high-parameter section of the steam turbine. The pipeline led out from the steam outlet of the high-parameter section of the steam turbine and the pipeline led out from the low-parameter superheated steam outlet of the low-parameter boiler are connected to the steam inlet of the reheater after being combined. The steam outlet of the reheater is connected to the steam inlet of the low-parameter section of the steam turbine. The rotating shaft of the steam turbine is connected to the rotating shaft of the generator. However, the low-temperature tail gas is not treated, increasing heat energy loss and resistance loss, and the heat energy utilization rate of the waste gas is relatively low. Content of the Utility Model

[0003] To solve the above technical problems, the utility model provides a flue gas device for waste heat power generation from low-temperature tail gas of a sintering cooler, which can filter and treat impurities in the tail gas, avoid affecting subsequent equipment, and improve the heat utilization rate.

[0004] To achieve the above object, a flue gas device for waste heat power generation from low-temperature tail gas of a sintering cooler of the utility model includes a waste heat boiler. The input end of the waste heat boiler is connected with a pretreatment component, and the input end of the pretreatment component is communicated with the low-temperature tail gas discharge pipeline of the sintering cooler. The output end of the waste heat boiler is connected with a pressurization component, and the output end of the pressurization component is connected with a driving component. The low-temperature tail gas is input into the pretreatment component to treat the tail gas, and then input into the waste heat boiler. The waste heat boiler absorbs the heat in the waste gas to prepare hot water and steam, which not only saves energy but also reduces the impact of flue gas emissions on the environment. During the external supply process, the heat loss is less and the heating efficiency is higher. The steam is stored and collected through the pressurization component, and the driving component is pushed to drive the generator to generate electricity.

[0005] Preferably, the pretreatment component includes a pretreatment tank, an air inlet hood, an air inlet channel, two flow guiding plates, two mounting frames, two adsorbents, and an input pipe. The output end of the pretreatment tank is connected to the input end of the waste heat boiler through the input pipe. The upper part of the left side wall of the pretreatment tank is connected with the air inlet hood, and the input end of the air inlet hood is connected with the air inlet channel. The flow guiding plates are alternately installed on the left and right inside of the pretreatment tank. The mounting frames are inserted at both ends of the pretreatment tank and are hermetically connected to the flow guiding plates. The inside of the mounting frames is filled with adsorbents. The low-temperature tail gas of the sintering cooler is input into the pretreatment tank through the air inlet channel and the air inlet hood. The tail gas flows between the flow guiding plates, and the impurities in the tail gas are filtered and processed by the adsorbents to avoid affecting the subsequent equipment. Then it is input into the waste heat boiler through the input pipe, and the waste heat boiler absorbs the heat in the waste gas to prepare hot water and steam.

[0006] Preferably, a sealing plate is fixedly connected to the outer wall of the mounting frame. The sealing plate is installed on the outer wall of the pretreatment tank through fixing screws, and the heat insulation layer is fixedly installed on the outer wall of the pretreatment tank. The mounting frame is hermetically fixed by the sealing plate, which is convenient for disassembly and replacement, improving convenience. The inside of the pretreatment tank is insulated by the heat insulation layer to avoid temperature loss and ensure the quality of heat recovery.

[0007] Preferably, the pressurization component includes an output pipe, a gas storage tank, a pressure gauge, a steam channel, and a pressure valve. The input end of the gas storage tank is connected to the output end of the waste heat boiler through the output pipe. A pressure gauge is installed on the gas storage tank. The output end of the gas storage tank is connected to the steam channel, and a pressure valve is installed on the steam channel. The waste heat boiler absorbs the heat in the waste gas to prepare hot water and steam. The steam is input into the gas storage tank through the output pipe. The steam is stored and collected by the gas storage tank. The pressure inside the gas storage tank is detected by the pressure gauge. Opening the pressure valve allows the steam to be discharged through the steam channel.

[0008] Preferably, an air delivery cylinder is fixedly installed on the output pipe. A rotating rod is rotatably installed inside the air delivery cylinder. An impeller is fixedly installed on the outer wall of the rotating rod. The input end of the rotating rod is connected to the output end of the transmission, and the input end of the transmission is connected to the output end of the motor. Starting the motor drives the rotating rod to rotate through the transmission, and the rotating rod drives the impeller to rotate, improving the collection efficiency of the steam.

[0009] Preferably, the driving component includes a driving cylinder, a turbine, and a driving output head. The output end of the steam channel is communicated with the inside of the driving cylinder. A turbine is rotatably installed in the middle of the driving cylinder. The middle output end of the turbine passes through the right side wall of the driving cylinder and is fixedly installed with the driving output head. The steam is input into the driving cylinder through the steam channel to drive the turbine to rotate. The driving output head is connected to the generator set to generate electricity using waste heat.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows: The low-temperature tail gas is input into the pretreatment component for treatment, and then input into the waste heat boiler. The waste heat boiler absorbs the heat in the waste gas to prepare hot water and steam, which not only saves energy but also reduces the impact of flue gas emissions on the environment. During the external supply process, the heat loss is less and the heating efficiency is higher. The steam is stored and collected by the pressurization component, which drives the driving component to drive the generator to generate electricity. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of the present utility model;

[0012] Figure 2 is an axonometric structural diagram of the present utility model;

[0013] Figure 3 is a left-view structural diagram of the present utility model;

[0014] Figure 4 is a front-view sectional structural diagram of the present utility model;

[0015] Figure 5 is a right-view sectional structural diagram of the present utility model;

[0016] Reference numerals in the drawings: 1. Waste heat boiler; 2. Pretreatment box; 3. Air inlet hood; 4. Air inlet channel; 5. Deflector; 6. Mounting frame; 7. Adsorbent; 8. Sealing plate; 9. Fixing screw; 10. Input pipe; 11. Heat insulation layer; 12. Output pipe; 13. Gas storage tank; 14. Pressure gauge; 15. Gas delivery cylinder; 16. Rotating rod; 17. Impeller; 18. Transmission; 19. Motor; 20. Steam channel; 21. Pressure valve; 22. Driving cylinder; 23. Turbine; 24. Driving output head. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. The present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present utility model more thorough and comprehensive.

[0018] Embodiment:

[0019] As Figures 1 to 5As shown in the figure, the output end of the pretreatment tank 2 is connected to the input end of the waste heat boiler 1 through the input pipe 10. The upper part of the left side wall of the pretreatment tank 2 is connected with an air inlet hood 3. The input end of the air inlet hood 3 is connected with an air inlet channel 4. Guide plates 5 are alternately installed inside the pretreatment tank 2 from left to right. The mounting frames 6 are inserted at both ends of the pretreatment tank 2, and the mounting frames 6 are hermetically connected to the guide plates 5. Adsorbents 7 are filled inside the mounting frames 6. Sealing plates 8 are fixedly connected to the outer walls of the mounting frames 6. The sealing plates 8 are installed on the outer wall of the pretreatment tank 2 through fixing screws 9. The heat insulation layer 11 is fixedly installed on the outer wall of the pretreatment tank 2. The input end of the gas storage tank 13 is connected to the output end of the waste heat boiler 1 through the output pipe 12. A pressure gauge 14 is installed on the gas storage tank 13. The output end of the gas storage tank 13 is connected with a steam channel 20. A pressure valve 21 is installed on the steam channel 20. An air delivery cylinder 15 is fixedly installed on the output pipe 12. A rotating rod 16 is rotatably installed inside the air delivery cylinder 15. An impeller 17 is fixedly installed on the outer wall of the rotating rod 16. The input end of the rotating rod 16 is connected to the output end of the transmission 18. The input end of the transmission 18 is connected to the output end of the motor 19. The output end of the steam channel 20 is communicated with the inside of the driving cylinder 22. A turbine 23 is rotatably installed in the middle of the driving cylinder 22. The middle output end of the turbine 23 passes through the right side wall of the driving cylinder 22 and is fixedly installed with a driving output head 24;

[0020] The low-temperature tail gas of the sintering cooler is input into the pretreatment tank 2 through the air inlet channel 4 and the air inlet hood 3. The tail gas flows between the guide plates 5. The impurities in the tail gas are filtered and processed by the adsorbent 7 to avoid affecting the subsequent equipment. Then it is input into the waste heat boiler 1 through the input pipe 10. The waste heat boiler 1 absorbs the heat in the waste gas to prepare hot water and steam. The mounting frame 6 is hermetically fixed through the sealing plate 8, which is convenient for disassembly and replacement, improving convenience. The inside of the pretreatment tank 2 is thermally insulated by the heat insulation layer 11 to avoid temperature loss and ensure the quality of heat recovery. The waste heat boiler 1 absorbs the heat in the waste gas to prepare hot water and steam. The steam is input into the gas storage tank 13 through the output pipe 12. The steam is stored and received by the gas storage tank 13. The pressure inside the gas storage tank 13 is detected by the pressure gauge 14. Opening the pressure valve 21 allows the steam to be discharged through the steam channel 20. Starting the motor 19 drives the rotating rod 16 to rotate through the transmission 18. The rotating rod 16 drives the impeller 17 to rotate, improving the collection efficiency of the steam. The steam is input into the driving cylinder 22 through the steam channel 20 to drive the turbine 23 to rotate. The driving output head 24 is connected to the generator set to generate electricity using waste heat.

[0021] When the sintering cooler low-temperature tail gas waste heat power generation flue gas device described in this embodiment is working, the low-temperature tail gas of the sintering cooler is input into the pretreatment box 2 through the air inlet channel 4 and the air inlet hood 3. The tail gas flows between the guide plates 5, and the impurities in the tail gas are filtered and treated by the adsorbent 7 to avoid affecting the subsequent equipment. Then it is input into the waste heat boiler 1 through the input pipe 10. The waste heat boiler 1 absorbs the heat in the waste gas to prepare hot water and steam. The mounting frame 6 is sealed and fixed by the sealing plate 8, which is convenient for disassembly and replacement, improving convenience. The inside of the pretreatment box 2 is insulated by the heat insulation layer 11 to avoid temperature loss. The mounting frame 6 is sealed and fixed by the sealing plate 8, which is convenient for disassembly and replacement, improving convenience. The inside of the pretreatment box 2 is insulated by the heat insulation layer 11 to avoid temperature loss. The waste heat boiler 1 absorbs the heat in the waste gas to prepare hot water and steam. The steam is input into the gas storage tank 13 through the output pipe 12. The motor 19 is started to drive the rotating rod 16 to rotate through the transmission 18, and the rotating rod 16 drives the impeller 17 to rotate, improving the collection efficiency of the steam. The steam is stored and received by the gas storage tank 13. The pressure inside the gas storage tank 13 is detected by the pressure gauge 14. The pressure valve 21 is opened, and the steam can be discharged through the steam channel 20. The steam is input into the driving cylinder 22 through the steam channel 20 to push the turbine 23 to rotate. The driving output head 24 is connected to the generator set to generate electricity using waste heat.

[0022] The adsorbent 7, pressure gauge 14, transmission 18 and motor 19 of the present utility model are purchased on the market. Those skilled in the industry only need to install and operate according to the attached operation manuals, without the need for creative labor from those skilled in the art.

[0023] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A flue gas device for generating electricity from waste heat of low-temperature tail gas from a sintering cooler, characterized in that: The invention comprises a waste heat boiler (1), wherein the input end of the waste heat boiler (1) is connected to a pretreatment component, the input end of the pretreatment component is in communication with a low-temperature tail gas discharge pipeline of a sintering cooler, the output end of the waste heat boiler (1) is connected to a booster component, and the output end of the booster component is connected to a drive component.

2. A sintering cooler low-temperature tail gas waste heat power generation flue gas device as claimed in claim 1, characterized in that: The pretreatment component comprises a pretreatment box (2), an air intake hood (3), an air intake passage (4), two guide plates (5), two mounting frames (6), two adsorbents (7) and an input pipe (10). The output end of the pretreatment box (2) is connected to the input end of the waste heat boiler (1) via the input pipe (10). The upper part of the left wall of the pretreatment box (2) is connected to the air intake hood (3). The input end of the air intake hood (3) is connected to the air intake passage (4). The interior of the pretreatment box (2) is alternately provided with guide plates (5) on the left and right sides. The mounting frame (6) is inserted at the left and right ends of the pretreatment box (2). The mounting frame (6) is sealedly connected to the guide plates (5). The interior of the mounting frame (6) is filled with adsorbents (7).

3. A sintering cooler low-temperature tail gas waste heat power generation flue gas device as claimed in claim 2, characterized in that: A sealing plate (8) is fixedly connected to the outer wall of the mounting frame (6); the sealing plate (8) is mounted on the outer wall of the pretreatment box (2) via fixing screws (9); and the thermal insulation layer (11) is fixedly mounted on the outer wall of the pretreatment box (2).

4. A sintering cooler low-temperature tail gas waste heat power generation flue gas device as claimed in claim 1, characterized in that: The booster assembly comprises an output pipe (12), an air storage tank (13), a pressure gauge (14), a steam channel (20) and a pressure valve (21); the input end of the air storage tank (13) is connected to the output end of the waste heat boiler (1) via the output pipe (12); the pressure gauge (14) is installed on the air storage tank (13); the output end of the air storage tank (13) is connected to the steam channel (20); and the pressure valve (21) is installed on the steam channel (20).

5. A sintering cooler low-temperature tail gas waste heat power generation flue gas device as claimed in claim 4, characterized in that: An air delivery cylinder (15) is fixedly mounted on the output pipe (12), a rotating rod (16) is rotatably mounted inside the air delivery cylinder (15), an impeller (17) is fixedly mounted on the outer wall of the rotating rod (16), an input end of the rotating rod (16) is connected to an output end of a transmission (18), and the input end of the transmission (18) is connected to an output end of a motor (19).

6. A sintering cooler low-temperature tail gas waste heat power generation flue gas device as claimed in claim 4, characterized in that: The driving assembly comprises a driving cylinder (22), a turbine (23) and a driving output head (24); the output end of the steam channel (20) is in communication with the interior of the driving cylinder (22); the turbine (23) is rotatably mounted in the middle of the driving cylinder (22); and the driving output head (24) is fixedly mounted on the middle output end of the turbine (23) through the right side wall of the driving cylinder (22).

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