Flue gas waste heat recycling device for coke oven

Abstract

The utility model belongs to the technical field of industrial energy conservation, and particularly relates to a coke oven flue gas waste heat recycling device which comprises a water tank. A water inlet is formed in the outer side of the water tank; a smoke exhaust pipe is fixedly connected to the interior of the water tank; a steam pipe is arranged on the top of the water tank close to the smoke exhaust pipe; one end of the steam pipe away from the water tank is fixedly connected with a smoke exhaust pipe; an intelligent alternate valve is mounted in the steam pipe; a threaded rotating column is rotationally connected to the interior of the smoke exhaust pipe; when waste heat is recovered through a boiler, a large amount of dust is carried in smoke of a coke oven, the dust is accumulated for a long time, so that a pipeline is possibly blocked, and the boiler cannot be normally used, so that the dust accumulated in the smoke exhaust pipe is cleaned through the back-and-forth movement of the cleaning scraper in the smoke exhaust pipe; the situation that the interior of the smoke exhaust pipe is blocked due to dust accumulation is greatly reduced, and the service life of the smoke exhaust pipe is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial energy conservation, in particular to a device for recovering and utilizing waste heat from flue gas of a coke oven. Background Art

[0002] Coking is a process in which coal is heated to a high temperature in an airtight environment and then thermally decomposed into various chemical products. It is also known as high-temperature distillation. Coking is an important part of modern steel production, but it also has problems such as severe pollution and high energy consumption.

[0003] The recovery and utilization of waste heat from coke oven flue gas is an energy-saving technology that recycles and reuses the heat carried by the flue gas emitted during the coking process. It mainly includes heat exchanger recovery, waste heat boiler recovery, etc. Among them, boiler recovery can provide heating and power generation.

[0004] In the prior art, when recovering waste heat through the boiler, a large amount of dust is carried inside the flue gas from the coke oven, and long-term accumulation may cause pipe blockage, resulting in the boiler being unable to operate normally. Therefore, a coke oven flue gas waste heat recovery and utilization device is proposed to address the above problem. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art and solve at least one technical problem raised in the background art, the present invention proposes a coke oven flue gas waste heat recovery and utilization device.

[0006] The technical solution adopted by the utility model to solve its technical problems is: the utility model describes a coking oven flue gas waste heat recovery device, comprising a water tank; a water inlet is provided on the outside of the water tank; a smoke exhaust pipe is fixedly connected to the inside of the water tank; a steam pipe is provided on the top of the water tank near the smoke exhaust pipe; the end of the steam pipe away from the water tank is fixedly connected to the smoke exhaust pipe; an intelligent alternating valve is installed inside the steam pipe; a threaded rotating column is rotatably connected to the inside of the smoke exhaust pipe; a rotating fan blade is fixed to the top of the threaded rotating column; a cleaning scraper is threadedly connected to the outside of the threaded rotating column; a slide groove is provided inside the smoke exhaust pipe; a cleaning scraper is slidably connected to the inside of the slide groove; and a first smoke inlet is provided at the bottom of the smoke exhaust pipe.

[0007] Preferably, a threaded line is fixedly connected to the outer side of the first smoke inlet; a smoke storage chamber is threadedly connected to the outer side of the threaded line; a second smoke inlet is opened on one side of the smoke storage chamber; a filter plate is fixedly connected to the inner side of the second smoke inlet; and a dust collection box is installed at the bottom of the smoke storage chamber.

[0008] Preferably, a reserved groove is provided at one end of the cleaning scraper close to the slide groove; a rotating shaft is fixedly connected inside the reserved groove; and a roller is rotatably connected to the outer side of the rotating shaft.

[0009] Preferably, the top of the smoke exhaust pipe is fixedly connected to a purification device shell; a smoke exhaust port is opened on the top of the purification device shell; and activated carbon is fixedly connected to the inside of the purification device shell.

[0010] Preferably, a circular groove is provided on the inner side of the water tank near one end of the threaded rotating cylinder; a round ball is rotatably connected inside the circular groove.

[0011] Preferably, cleaning brushes are fixedly connected to both ends of the cleaning scraper.

[0012] Preferably, a mounting bracket is fixedly connected to a side of the water tank away from the water inlet.

[0013] The utility model is beneficial in that:

[0014] 1. The utility model describes a coke oven flue gas waste heat recovery and utilization device. When recovering waste heat through the boiler, the coke oven flue gas carries a large amount of dust. Long-term accumulation may cause pipe blockage and make the boiler unable to use normally. Therefore, the cleaning scraper moves back and forth inside the exhaust pipe to clean the dust accumulated inside the exhaust pipe, which greatly reduces the blockage caused by dust accumulation inside the exhaust pipe and increases the service life of the exhaust pipe.

[0015] 2. In the coking oven flue gas waste heat recovery and utilization device described in the utility model, when cleaning the inside of the exhaust pipe, some dust and impurities on the inner wall of the exhaust pipe may fall into the flue gas duct, causing the flue gas duct to be blocked. Therefore, the cleaned impurities are stored in the dust collection box, reducing the impact of accumulated impurities on the flue gas duct. At the same time, larger smoke dust particles are roughly filtered through the filter plate, reducing the possibility of blockage of the exhaust pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the water tank in the utility model;

[0018] Figure 2 This is a schematic diagram of the three-dimensional cross-sectional structure of the threaded rotating column in the present utility model;

[0019] Figure 3 This is a schematic diagram of the smoke storage chamber structure in the present utility model;

[0020] Figure 4This is a schematic diagram of the cleaning scraper structure in the present utility model.

[0021] In the figure: 1. Water tank; 11. Water inlet; 12. Smoke exhaust pipe; 13. Steam pipe; 14. Intelligent alternating valve; 15. Rotating fan blades; 16. Slide; 17. Threaded column; 18. Cleaning scraper; 19. First smoke inlet; 2. Thread line; 21. Smoke storage chamber; 22. Second smoke inlet; 23. Filter plate; 24. Dust collection box; 3. Reserved slot; 31. Rotating shaft; 32. Roller; 4. Purification device housing; 41. Smoke exhaust port; 42. Activated carbon; 5. Round groove; 51. Round ball; 6. Cleaning brush; 7. Mounting bracket. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] like Figure 1-4The figure shows a device for recovering waste heat from flue gas in a coke oven, comprising a water tank 1; a water inlet 11 is provided on the outside of the water tank 1; a smoke exhaust pipe 12 is fixedly connected to the inside of the water tank 1; a steam pipe 13 is provided on the top of the water tank 1 near the smoke exhaust pipe 12; the end of the steam pipe 13 away from the water tank 1 is fixedly connected to the smoke exhaust pipe 12; an intelligent alternating valve 14 is installed inside the steam pipe 13; a threaded rotating column 17 is rotatably connected to the inside of the smoke exhaust pipe 12; a rotating fan blade 15 is fixed to the top of the threaded rotating column 17; a cleaning scraper 18 is threadedly connected to the outside of the threaded rotating column 17; a slide groove 16 is provided inside the smoke exhaust pipe 12; a cleaning scraper 18 is slidably connected to the inside of the slide groove 16; a first smoke inlet 19 is provided at the bottom of the smoke exhaust pipe 12; when working, water is injected into the water tank 1 through the water inlet 11, and then the smoke is injected into the smoke exhaust pipe 12 through the first smoke inlet 19, and the waste heat carried by the smoke heats the smoke exhaust pipe 12 When the water in the water tank 1 is heated to boiling, the water generates steam, which is discharged into the exhaust pipe 12 through the steam pipe 13. Because the rotating fan blades 15 are close to the steam pipe 13, the rotating fan blades 15 are driven by the steam to start rotating, driving the cleaning scraper 18 to move in the slide 16, and at the same time cleaning the inner wall of the exhaust pipe 12. At the same time, the use of the intelligent alternating valve 14 alternately opens and closes the steam pipe 13, and has a guiding effect on the steam, so that the threaded rotating column 17 moves up and down back and forth inside the water tank 1. When recovering waste heat through the boiler, this step, because the coke oven flue gas carries a lot of dust, long-term accumulation may cause pipe blockage, resulting in the boiler being unable to use normally, so the cleaning scraper 18 moves back and forth inside the exhaust pipe 12 to clean the dust accumulated inside the exhaust pipe 12, which greatly reduces the blockage caused by dust accumulation inside the exhaust pipe 12 and increases the service life of the exhaust pipe 12.

[0024] like Figure 1 、 Figure 3As shown, the outer side of the first smoke inlet 19 is fixedly connected with a threaded wire 2; the outer side of the threaded wire 2 is threadedly connected to a smoke storage chamber 21; a second smoke inlet 22 is opened on one side of the smoke storage chamber 21; a filter plate 23 is fixedly connected to the inner side of the second smoke inlet 22; a dust collection box 24 is installed at the bottom of the smoke storage chamber 21; when working, the threaded wire 2 is connected to the first smoke inlet 19 by rotation, and the dust collection box 24 is installed at the bottom of the smoke storage chamber 21. At the same time, the smoke is injected into the smoke storage chamber 21 through the second smoke inlet 22, and the filter plate 23 removes larger dust particles in the smoke. The filtration is blocked, but the dust and dirt cleaned from the inside of the smoke exhaust pipe 12 falls into the dust collecting box 24. When the dust collecting box 24 is full, it is removed to clean it. During this step, when the inside of the smoke exhaust pipe 12 is cleaned, some dust and impurities on the inner wall of the smoke exhaust pipe 12 may fall into the smoke duct, causing the smoke duct to be blocked. Therefore, the cleaned impurities are stored in the dust collecting box 24, reducing the impact of accumulated impurities on the smoke duct. At the same time, the larger smoke particles are roughly filtered through the filter plate 23, reducing the possibility of blockage of the smoke exhaust pipe 12.

[0025] like Figure 4 As shown, the cleaning scraper 18 is provided with a reserved groove 3 near one end of the slide groove 16; a rotating shaft 31 is fixed inside the reserved groove 3; a roller 32 is rotatably connected to the outer side of the rotating shaft 31; when the cleaning scraper 18 slides inside the slide groove 16 during operation, the rotating shaft 31 inside the reserved groove 3 is fixedly connected to the cleaning scraper 18, and at the same time the roller 32 contacts the slide groove 16, and the roller 32 rotates during sliding, greatly reducing the friction between the cleaning scraper 18 and the slide groove 16; in this step, when the cleaning scraper 18 slides inside the slide groove 16, the friction between the cleaning scraper 18 and the slide groove 16 is too large, so the service life of the cleaning scraper 18 is reduced. Through the rotation of the roller 32, the friction between the cleaning scraper 18 and the slide groove 16 is greatly reduced, thereby increasing the service life of the cleaning scraper 18.

[0026] like Figure 1-2 As shown, a purification device housing 4 is fixedly connected to the top of the exhaust pipe 12; a smoke outlet 41 is opened at the top of the purification device housing 4; activated carbon 42 is fixedly connected to the inside of the purification device housing 4; when the temperature of the flue gas decreases during operation, it is purified by the activated carbon 42 inside the purification device housing 4 and then discharged into the air through the smoke outlet 41. The flue gas generated during coking in this step contains many pollutants, which will pollute the atmosphere if directly discharged into the atmosphere. Therefore, the harmful substances therein are adsorbed and purified by the activated carbon 42, thereby reducing the pollution of the air caused by the flue gas directly discharged into the atmosphere.

[0027] like Figure 2As shown, a circular groove 5 is opened on the inner side of the water tank 1 near one end of the threaded rotating cylinder 17; a ball 51 is rotatably connected inside the circular groove 5; when the threaded rotating cylinder 17 rotates inside the smoke exhaust pipe 12 during operation, the middle part of the threaded rotating cylinder 17 is pressed on the ball 51 inside the circular groove 5, and the ball 51 rotates along with it inside the circular groove 5. This step may reduce the direct friction between the threaded rotating cylinder 17 and the smoke exhaust pipe 12 through the ball 51, so that the steam-driven rotating fan blades 15 can rotate more efficiently, thereby improving the working efficiency of the device.

[0028] like Figure 2 、 Figure 4 As shown, cleaning brushes 6 are fixedly connected to both ends of the cleaning scraper 18; when the cleaning scraper 18 slides up and down inside the smoke exhaust pipe 12 during operation, the cleaning brush 6 cleans the outside of the threaded cylinder 17. In this step, the threads on the outside of the threaded cylinder 17 are very prone to dust accumulation, thereby affecting work efficiency. Therefore, the cleaning brush 6 is used to clean the outside of the threaded cylinder 17, thereby reducing the accumulation of dust on the outside of the threaded cylinder 17 and improving the work efficiency of the threaded cylinder 17.

[0029] like Figure 1 As shown, a mounting bracket 7 is fixedly connected to the side of the water tank 1 away from the water inlet 11; when working, the device is installed at the required position through the mounting bracket 7. When the device needs to be installed, the use of the mounting bracket 7 will make the device installation more stable.

[0030] Working principle: water is injected into the water tank 1 through the water inlet 11, and then the smoke is injected into the exhaust pipe 12 through the first smoke inlet 19. The waste heat carried by the smoke heats the exhaust pipe 12. When the water in the water tank 1 is heated to boiling, the water generates steam, which is discharged into the exhaust pipe 12 through the steam pipe 13. Because the rotating fan blades 15 are close to the steam pipe 13, the rotating fan blades 15 are driven by the steam to start rotating, driving the cleaning scraper 18 to move in the chute 16, and at the same time cleaning the inner wall of the exhaust pipe 12. At the same time, the use of the intelligent alternating valve 14 is switched. The steam pipe 13 is opened and closed in turn, and it has a guiding effect on the steam, so that the threaded rotating column 17 moves back and forth inside the water tank 1. When the waste heat is recovered through the boiler, due to the large amount of dust carried inside the coke oven flue gas, long-term accumulation may cause pipe blockage, resulting in the boiler being unable to use normally. Therefore, the cleaning scraper 18 moves back and forth inside the exhaust pipe 12 to clean the dust accumulated inside the exhaust pipe 12, which greatly reduces the blockage caused by dust accumulation inside the exhaust pipe 12 and increases the efficiency of the exhaust pipe 12. The service life of the smoke exhaust pipe 12 is increased by 10%. The threaded wire 2 is connected to the first smoke inlet 19 by rotation. The dust collecting box 24 is installed at the bottom of the smoke storage chamber 21. At the same time, the smoke is injected into the smoke storage chamber 21 through the second smoke inlet 22. The filter plate 23 blocks and filters the larger dust particles in the smoke. However, the dust and dirt cleaned from the inside of the smoke exhaust pipe 12 fall into the dust collecting box 24. When the dust collecting box 24 is full, it is removed to clean it. In this step, when cleaning the inside of the smoke exhaust pipe 12, some dust and impurities on the inner wall of the smoke exhaust pipe 12 may fall into the smoke. The dust collecting box 24 is used to store the cleaned impurities, thereby reducing the impact of the accumulated impurities on the smoke pipe. At the same time, the filter plate 23 is used to roughly filter the larger smoke particles, thereby reducing the possibility of clogging the smoke exhaust pipe 12. When the cleaning scraper 18 slides inside the chute 16, the rotating shaft 31 inside the reserved groove 3 is fixedly connected to the cleaning scraper 18, and the roller 32 is in contact with the chute 16. When sliding, the roller 32 rotates, which greatly reduces the friction between the cleaning scraper 18 and the chute 16.In this step, when the cleaning scraper 18 slides inside the chute 16, the friction between the cleaning scraper 18 and the chute 16 is too large, so the service life of the cleaning scraper 18 is reduced. Through the rotation of the roller 32, the friction between the cleaning scraper 18 and the chute 16 is greatly reduced, which increases the service life of the cleaning scraper 18. When the temperature of the flue gas is reduced, it is purified by the activated carbon 42 inside the purification device shell 4 and then discharged into the air through the smoke outlet 41. The flue gas generated during coking in this step contains many pollutants, which will pollute the atmosphere if discharged directly into the atmosphere. Therefore, the harmful substances therein are adsorbed and purified by the activated carbon 42, which reduces the pollution to the air caused by the flue gas being directly discharged into the atmosphere. When the threaded rotating column 17 rotates inside the smoke exhaust pipe 12, the middle part of the threaded rotating column 17 presses on the circular groove 5, the ball 51 rotates along with it within the circular groove 5. This step reduces the direct friction between the threaded column 17 and the exhaust pipe 12 through the ball 51, making the steam-driven rotating fan blade 15 more efficient, thereby improving the operating efficiency of the device. As the cleaning scraper 18 slides up and down within the exhaust pipe 12, the cleaning brush 6 cleans the outside of the threaded column 17. In this step, the threads on the outside of the threaded column 17 are prone to dust accumulation, which affects operating efficiency. Therefore, the cleaning brush 6 cleans the outside of the threaded column 17, reducing dust accumulation on the outside of the threaded column 17 and improving the operating efficiency of the threaded column 17. The device is installed in the desired location using the mounting bracket 7. In this step, the use of the mounting bracket 7 makes the device more secure when it is required to be installed.

[0031] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. A coke oven flue gas waste heat recovery and utilization device, comprising a water tank (1); characterized in that: The water tank (1) is provided with a water inlet (11) on the outside; a smoke exhaust pipe (12) is fixedly connected to the inside of the water tank (1); a steam pipe (13) is provided on the top of the water tank (1) near the smoke exhaust pipe (12); the end of the steam pipe (13) away from the water tank (1) is fixedly connected to the smoke exhaust pipe (12); an intelligent alternating valve (14) is installed inside the steam pipe (13); a threaded rotating column (17) is rotatably connected to the inside of the smoke exhaust pipe (12); a rotating fan blade (15) is fixedly connected to the top of the threaded rotating column (17); a cleaning scraper (18) is threadedly connected to the outside of the threaded rotating column (17); a slide groove (16) is provided inside the smoke exhaust pipe (12); a cleaning scraper (18) is slidably connected inside the slide groove (16); and a first smoke inlet (19) is provided at the bottom of the smoke exhaust pipe (12).

2. The coke oven flue gas waste heat recovery device according to claim 1, characterized in that: The first smoke inlet (19) is fixedly connected to a threaded line (2) on the outside; the threaded line (2) is threadedly connected to a smoke storage chamber (21) on the outside; a second smoke inlet (22) is opened on one side of the smoke storage chamber (21); a filter plate (23) is fixedly connected to the inside of the second smoke inlet (22); and a dust collection box (24) is installed at the bottom of the smoke storage chamber (21).

3. The coke oven flue gas waste heat recovery device according to claim 1, characterized in that: The cleaning scraper (18) is provided with a reserved groove (3) at one end close to the slide groove (16); a rotating shaft (31) is fixedly connected inside the reserved groove (3); and a roller (32) is rotatably connected to the outside of the rotating shaft (31).

4. The coke oven flue gas waste heat recovery device according to claim 1, characterized in that: The top of the smoke exhaust pipe (12) is fixedly connected to a purification device housing (4); a smoke exhaust port (41) is provided at the top of the purification device housing (4); and activated carbon (42) is fixedly connected inside the purification device housing (4).

5. The coke oven flue gas waste heat recovery device according to claim 1, characterized in that: A circular groove (5) is provided on the inner side of the water tank (1) near one end of the threaded rotating column (17); a round ball (51) is rotatably connected inside the circular groove (5).

6. The coke oven flue gas waste heat recovery device according to claim 3, characterized in that: Cleaning brushes (6) are fixedly connected to both ends of the cleaning scraper (18).

7. The coke oven flue gas waste heat recovery device according to claim 5, characterized in that: A mounting frame (7) is fixedly connected to the side of the water tank (1) away from the water inlet (11).

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