Deoxidizing device for recovering flue gas heat

Abstract

The utility model discloses a deoxidizing device for recovering flue gas heat, and relates to the technical field of flue gas heat recovery. The device comprises a bottom plate, the bottom plate is provided with a stirring mechanism, the stirring mechanism comprises a deoxidizing tank fixedly connected to the top of the bottom plate, the top of the deoxidizing tank is rotatably connected with a rotating shaft, a threaded sleeve is in threaded connection with an internal threaded block, the outer side of the internal threaded block is fixedly connected with a rotating plate, and the rotating plate is fixedly connected with a rotating shaft. A plurality of stirring blades are fixedly connected to the outer wall of the rotating plate, a fixing plate is fixedly connected to the rotating shaft, two limiting rods are fixedly connected to the bottom of the fixing plate, and the two limiting rods are both in sliding connection with the rotating plate. Water is in a dynamic state, so that the contact opportunity of the water and steam or other deoxidizing media is increased, dissolved oxygen in the water is more easily diffused to the surface of the water and then is brought to the water surface along with water flow movement generated by stirring, escape of the oxygen from the water is accelerated, and the deoxidizing efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of flue gas heat recovery, and particularly relates to a deaerator for recovering the heat of flue gas. Background Technique

[0002] The deaerator for recovering the heat of flue gas mainly uses the waste heat in the flue gas to heat and deaerate water. When the flue gas passes through a specific heat exchange structure, it transfers heat to the water to be deaerated. After the water is heated, the dissolved oxygen in it will gradually escape as the temperature rises, so as to achieve the purpose of deaeration.

[0003] In some existing deaerators, the water to be deaerated is static, which results in an unsatisfactory deaeration effect. Oxygen can only rely on natural diffusion, which is a very slow process, leading to low deaeration efficiency. At the same time, when using the heat of flue gas for deaeration, the static water will show a temperature stratification phenomenon, which further makes the deaeration effect unstable. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a deaerator for recovering the heat of flue gas, which solves the problem that the water to be deaerated in some existing deaerators is static, resulting in an unsatisfactory deaeration effect, by setting a stirring mechanism.

[0005] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0006] The utility model is a deaerator for recovering the heat of flue gas, including a bottom plate, and a stirring mechanism and a heat exchange mechanism are arranged on the bottom plate.

[0007] The stirring mechanism includes a deaeration tank fixedly connected to the top of the bottom plate. A protective barrel is fixedly connected to the inner wall of the deaeration tank. A rotating shaft is rotatably connected to the top of the deaeration tank. A threaded sleeve is fixedly connected to the inner bottom wall of the protective barrel. An internally threaded block is threadedly connected to the threaded sleeve. A rotating plate is fixedly connected to the outside of the internally threaded block. A plurality of stirring blades are fixedly connected to the outer wall of the rotating plate. A fixing plate is fixedly connected to the rotating shaft. Two limiting rods are fixedly connected to the bottom of the fixing plate. The bottom ends of the two limiting rods both penetrate through the rotating plate and are slidably connected to the rotating plate.

[0008] Further, a motor is fixedly connected to the top of the deaeration tank, and the top end of the rotating shaft is fixedly connected to the output shaft of the motor through a coupling.

[0009] Further, a number of second stirring rods are fixedly connected to the rotating shaft, and a number of the second stirring rods are all slidably connected to the inner wall of the deaeration tank. A number of the second stirring rods are fixedly connected to the deaeration tank, and a number of the second stirring rods are all slidably connected to the inner wall of the protective barrel. A water injection port one is communicated and arranged at the top of the deaeration tank, a drain port is communicated and arranged at the bottom of the deaeration tank, and a valve is fixedly connected to the outer wall of the drain port.

[0010] Further, the heat exchange mechanism includes a heat exchange component and a steam collecting component. The heat exchange component includes a filter box fixedly connected to the top of the bottom plate. A smoke inlet pipe is communicated and arranged on the left side of the filter box. A sealing door is hinged to the rear side of the filter box, and a filter plate is fixedly connected to the inner wall of the filter box.

[0011] Further, a water tank is fixedly connected to the top of the bottom plate. A heat exchange pipe is communicated and arranged on the right side of the filter box, and the right end of the heat exchange pipe penetrates through the water tank and is fixedly connected to the water tank.

[0012] Further, a spiral pipe is wound around the outer wall of the protective barrel. One end of the spiral pipe close to the water tank extends to the outside of the deaeration tank and is fixedly connected to the deaeration tank. One end of the spiral pipe close to the water tank is fixedly connected to the heat exchange pipe. A smoke outlet is communicated and arranged on the outer wall of the deaeration tank. One end of the smoke outlet close to the deaeration tank extends to the inside of the deaeration tank and is fixedly connected to the spiral pipe.

[0013] Further, the steam collecting component includes a first connecting pipe fixedly connected to the top of the water tank. A one-way valve is fixedly connected to the outer wall of the first connecting pipe, and a steam collecting tank is fixedly connected to the top end of the first connecting pipe.

[0014] Further, a second connecting pipe is communicated and arranged at the top end of the one-way valve. One end of the second connecting pipe away from the steam collecting tank extends to the inside of the deaeration tank and is fixedly connected to the deaeration tank. A second water injection port is communicated and arranged at the rear side of the water tank.

[0015] The utility model has the following beneficial effects:

[0016] 1. By arranging the stirring mechanism, starting the motor, the motor drives the rotating shaft to rotate. When the rotating shaft rotates, it drives the first stirring rod and the second stirring rod to rotate. When the rotating shaft rotates, it drives the fixing plate to rotate. When the fixing plate rotates, it drives the internal thread block to move and rotate on the threaded sleeve through the limiting rod. When the internal thread block rotates, it drives the stirring blade to rotate through the rotating plate. By the stirring mechanism, the water is in a dynamic state, increasing the contact opportunity between the water and steam or other deaeration media, making the dissolved oxygen in the water easier to diffuse to the surface of the water, and then being brought to the water surface with the water flow movement generated by the stirring, accelerating the escape of oxygen from the water, thereby improving the deaeration efficiency.

[0017] 2. By setting up a heat exchange mechanism, the flue gas enters the filter box through the smoke inlet pipe, and then is filtered through the filter plate. The filtered flue gas enters the spiral pipe through the heat exchange pipe and is finally safely discharged from the smoke outlet. When the flue gas passes through the heat exchange pipe and passes through the water tank, steam is generated by the heat exchange between the flue gas passing through the heat exchange pipe and the water in the water tank. The steam rises and enters the steam collecting tank through the first connecting pipe, and finally is discharged into the deaerator through the second connecting pipe. By using the heat of the flue gas through the heat exchange mechanism to generate water vapor, injecting the steam into the deaerator increases the total pressure in the deaerator, while the partial pressure of oxygen decreases relatively, thereby enabling the dissolved oxygen in the water to escape more quickly, thus improving the deaeration efficiency. At the same time, when the steam is discharged into the water, bubbles will be generated. These bubbles will drive the surrounding water to flow during the rising process, playing a role in stirring and further enhancing the deaeration effect.

[0018] Of course, it is not necessary for any product implementing the present utility model to simultaneously achieve all the above-mentioned advantages. Brief Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0021] Figure 2 It is a schematic diagram of the rear view structure of the present utility model;

[0022] Figure 3 It is a schematic diagram of the front view sectional structure of the present utility model;

[0023] Figure 4 It is a schematic diagram of the structure of the deaerator of the present utility model;

[0024] Figure 5 It is a schematic diagram of the structure of the threaded sleeve of the present utility model.

[0025] In the drawings, the list of components represented by each reference numeral is as follows:

[0026] 1. Bottom plate; 2. Stirring mechanism; 3. Heat exchange mechanism; 21. Deaeration tank; 22. Protective barrel; 23. Rotating shaft; 24. Threaded sleeve; 25. Internal thread block; 26. Rotating plate; 27. Stirring blade; 28. Fixed plate; 29. Limiting rod; 210. Motor; 211. First stirring rod; 212. Second stirring rod; 213. First water injection port; 214. Drain port; 215. Valve; 31. Filter box; 32. Smoke inlet pipe; 33. Sealing door; 34. Filter plate; 35. Water tank; 36. Heat exchange pipe; 37. Spiraling pipe; 38. Smoke outlet; 39. First connecting pipe; 310. Check valve; 311. Steam collecting tank; 312. Second connecting pipe; 313. Second water injection port. Detailed implementation manner

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0028] Please refer to Figures 1-5As shown in the figure, the utility model relates to a deaerator for recovering the heat of flue gas, which comprises a bottom plate 1. A stirring mechanism 2 and a heat exchange mechanism 3 are arranged on the bottom plate 1. The stirring mechanism 2 includes a deaeration tank 21 fixedly connected to the top of the bottom plate 1. A protective barrel 22 is fixedly connected to the inner wall of the deaeration tank 21. A rotating shaft 23 is rotatably connected to the top of the deaeration tank 21. A threaded sleeve 24 is fixedly connected to the inner bottom wall of the protective barrel 22. An internally threaded block 25 is threadedly connected to the threaded sleeve 24. A rotating plate 26 is fixedly connected to the outside of the internally threaded block 25. A plurality of stirring blades 27 are fixedly connected to the outer wall of the rotating plate 26. A fixing plate 28 is fixedly connected to the rotating shaft 23. Two limiting rods 29 are fixedly connected to the bottom of the fixing plate 28. The bottom ends of the two limiting rods 29 both penetrate through the rotating plate 26 and are slidably connected to the rotating plate 26. A motor 210 is fixedly connected to the top of the deaeration tank 21. The top end of the rotating shaft 23 is fixedly connected to the output shaft of the motor 210 through a coupling. A plurality of second stirring rods 212 are fixedly connected to the rotating shaft 23. The plurality of second stirring rods 212 are all slidably connected to the inner wall of the deaeration tank 21. A plurality of second stirring rods 212 are fixedly connected to the deaeration tank 21. The plurality of second stirring rods 212 are all slidably connected to the inner wall of the protective barrel 22. A first water injection port 213 is communicated with the top of the deaeration tank 21. A drain port 214 is communicated with the bottom of the deaeration tank 21. A valve 215 is fixedly connected to the outer wall of the drain port 214. By means of the stirring mechanism 2, the water is in a dynamic state, increasing the contact opportunity between the water and steam or other deaeration media, making the dissolved oxygen in the water more likely to diffuse to the surface of the water, and then being brought to the water surface with the water flow movement generated by the stirring, accelerating the escape of oxygen from the water, thereby improving the deaeration efficiency.

[0029] The heat exchange mechanism 3 includes a heat exchange component and a steam collecting component. The heat exchange component includes a filter box 31 fixedly connected to the top of the bottom plate 1. A smoke inlet pipe 32 is communicatively arranged on the left side of the filter box 31. A sealing door 33 is hinged to the rear side of the filter box 31. A filter plate 34 is fixedly connected to the inner wall of the filter box 31. A water tank 35 is fixedly connected to the top of the bottom plate 1. A heat exchange pipe 36 is communicatively arranged on the right side of the filter box 31. The right end of the heat exchange pipe 36 penetrates through the water tank 35 and is fixedly connected to the water tank 35. A spiral pipe 37 is wound around the outer wall of the protection barrel 22. One end of the spiral pipe 37 close to the water tank 35 extends to the outside of the deaerator 21 and is fixedly connected to the deaerator 21. One end of the spiral pipe 37 close to the water tank 35 is fixedly connected to the heat exchange pipe 36. A smoke outlet 38 is communicatively arranged on the outer wall of the deaerator 21. One end of the smoke outlet 38 close to the deaerator 21 extends to the inside of the deaerator 21 and is fixedly connected to the spiral pipe 37. The steam collecting component includes a connecting pipe one 39 fixedly connected to the top of the water tank 35. A one-way valve 310 is fixedly connected to the outer wall of the connecting pipe one 39. A steam collecting tank 311 is fixedly connected to the top end of the connecting pipe one 39. A connecting pipe two 312 is communicatively arranged at the top end of the one-way valve 310. One end of the connecting pipe two 312 away from the steam collecting tank 311 extends to the inside of the deaerator 21 and is fixedly connected to the deaerator 21. A water injection port two 313 is communicatively arranged at the rear side of the water tank 35. By using the heat of the flue gas through the heat exchange mechanism 3 to generate water vapor, injecting the steam into the deaerator increases the total pressure in the deaerator, and the partial pressure of oxygen therein relatively decreases, thereby enabling the dissolved oxygen in the water to escape more quickly, thus improving the deaeration efficiency.

[0030] A specific application of this embodiment is as follows: When the flue gas passes through the spiral pipe 37, the flue gas exchanges heat with the water in the deaerator 21 through the spiral pipe 37. After the water is heated, the dissolved oxygen therein will gradually escape as the temperature rises, thereby achieving the purpose of deaeration. At the same time, start the motor 210. The motor 210 drives the rotating shaft 23 to rotate. When the rotating shaft 23 rotates, it drives the fixing plate 28 to rotate. When the fixing plate 28 rotates, it drives the limiting rod 29 to rotate around the rotating shaft 23 as the axis. When the limiting rod 29 rotates, it drives the rotating plate 26 to rotate. When the rotating plate 26 rotates, it drives the internal thread block 25 to rotate and move on the threaded sleeve 24, and then feeds back to the rotating plate 26, so that the rotating plate 26 drives the stirring blade 27 to rotate and move. When the rotating shaft 23 rotates, it drives the stirring rod one 211 and the stirring rod two 212 to rotate. Through the rotation of the stirring blade 27, the stirring rod one 211 and the stirring rod two 212, the water in the deaerator 21 flows, making the dissolved substances in the water easier to diffuse to the water surface, improving the deaeration efficiency. The heated water can be discharged for use through the drain port 214. At the same time, water is injected into the deaerator 21 through the water injection port one 213 for the next deaeration use.

[0031] Connect the smoke inlet pipe 32 to the main flue gas pipe so that the flue gas enters the filter box 31 through the smoke inlet pipe 32. After the flue gas enters the filter box 31, it is filtered by the filter plate 34 to prevent the return particles in the flue gas from entering the pipe and causing blockage. The filtered dust particles can be cleaned through the sealing door 33 later. The filtered flue gas enters the spiral pipe 37 through the heat exchange pipe 36 and finally discharges from the smoke outlet 38. When the flue gas enters the heat exchange pipe 36 and passes through the water tank 35, the flue gas exchanges heat with the water in the water tank 35 through the heat exchange pipe 36. When the water in the water tank 35 is heated to generate steam, the steam rises and enters the steam collector 311 through the connecting pipe 1 39. The one-way valve 310 allows the steam in the water tank 35 to enter the steam collector 311, and the steam in the steam collector 311 cannot enter the water tank 35. Finally, the steam in the steam collector 311 enters the deaerator 21 through the connecting pipe 2 312. By discharging steam into the water in the deaerator 21, the components in the steam react chemically with the dissolved oxygen in the water, thereby directly removing oxygen. When the water in the water tank 35 is exhausted, it is refilled through the water injection port 2 313.

[0032] In the description of this specification, the description with reference to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0033] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. An oxygen deaerator for recovering the heat of flue gas, comprising a bottom plate (1), wherein a stirring mechanism (2) and a heat exchange mechanism (3) are arranged on the bottom plate (1), and it is characterized in that: The stirring mechanism (2) includes an oxygen deaeration tank (21) fixedly connected to the top of the bottom plate (1). A protective barrel (22) is fixedly connected to the inner wall of the oxygen deaeration tank (21). A rotating shaft (23) is rotatably connected to the top of the oxygen deaeration tank (21). A threaded sleeve (24) is fixedly connected to the inner bottom wall of the protective barrel (22). An internally threaded block (25) is threadedly connected to the threaded sleeve (24). A rotating plate (26) is fixedly connected to the outer side of the internally threaded block (25). A plurality of stirring blades (27) are fixedly connected to the outer wall of the rotating plate (26). A fixing plate (28) is fixedly connected to the rotating shaft (23). Two limiting rods (29) are fixedly connected to the bottom of the fixing plate (28). The bottom ends of the two limiting rods (29) both penetrate through the rotating plate (26) and are slidably connected to the rotating plate (26).

2. The deaerator for recovering the heat of flue gas according to claim 1, characterized in that, A motor (210) is fixedly connected to the top of the oxygen deaeration tank (21). The top end of the rotating shaft (23) is fixedly connected to the output shaft of the motor (210) through a coupling.

3. The deaerator for recovering the heat of flue gas according to claim 2, characterized in that, A plurality of second stirring rods (212) are fixedly connected to the rotating shaft (23). All the plurality of second stirring rods (212) are slidably connected to the inner wall of the oxygen deaeration tank (21). A plurality of second stirring rods (212) are fixedly connected to the oxygen deaeration tank (21). All the plurality of second stirring rods (212) are slidably connected to the inner wall of the protective barrel (22). A first water injection port (213) is communicated and arranged at the top of the oxygen deaeration tank (21). A drain port (214) is communicated and arranged at the bottom of the oxygen deaeration tank (21). A valve (215) is fixedly connected to the outer wall of the drain port (214).

4. The deaerator for recovering the heat of flue gas according to claim 3, characterized in that, The heat exchange mechanism (3) includes a heat exchange component and a steam collection component. The heat exchange component includes a filter box (31) fixedly connected to the top of the bottom plate (1). A smoke inlet pipe (32) is communicated and arranged on the left side of the filter box (31). A sealing door (33) is hinged to the rear side of the filter box (31). A filter plate (34) is fixedly connected to the inner wall of the filter box (31).

5. The deaerator for recovering the heat of flue gas according to claim 4, wherein, A water tank (35) is fixedly connected to the top of the bottom plate (1). A heat exchange pipe (36) is communicated and arranged on the right side of the filter box (31). The right end of the heat exchange pipe (36) penetrates through the water tank (35) and is fixedly connected to the water tank (35).

6. The deaerator for recovering the heat of flue gas according to claim 5, wherein, A coiled pipe (37) is wound around the outer wall of the protective barrel (22). One end of the coiled pipe (37) close to the water tank (35) extends to the outside of the oxygen deaeration tank (21) and is fixedly connected to the oxygen deaeration tank (21). One end of the coiled pipe (37) close to the water tank (35) is fixedly connected to the heat exchange pipe (36). A smoke outlet (38) is communicated and arranged on the outer wall of the oxygen deaeration tank (21). One end of the smoke outlet (38) close to the oxygen deaeration tank (21) extends to the inside of the oxygen deaeration tank (21) and is fixedly connected to the coiled pipe (37).

7. The deaerator for recovering the heat of flue gas according to claim 6, characterized in that, The steam collecting assembly includes a first connecting pipe (39) fixedly connected to the top of the water tank (35). A check valve (310) is fixedly connected to the outer wall of the first connecting pipe (39), and a steam collecting tank (311) is fixedly connected to the top end of the first connecting pipe (39).

8. The deaerator for recovering the heat of flue gas according to claim 7, characterized in that, The top end of the check valve (310) is communicated with a second connecting pipe (312). One end of the second connecting pipe (312) far away from the steam collecting tank (311) extends into the inside of the deaeration tank (21) and is fixedly connected to the deaeration tank (21). A second water injection port (313) is communicated with the rear side of the water tank (35).

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