Flue gas cooling tower and cooling process thereof

Abstract

The invention relates to a flue gas cooling tower and a cooling process thereof, and relates to the technical field of waste gas treatment. The flue gas purification tower comprises a tower body and a spray head arranged at the top of the tower body, and a gas supply pipe for conveying flue gas is arranged on the tower body in a communicating manner; a mounting opening is formed in the top of the tower body in a penetrating manner, a sealing block for sealing the mounting opening is arranged at the mounting opening of the tower body, and the spraying head is arranged on the sealing block; a fastening assembly is arranged between the sealing block and the tower body and is used for connecting the sealing block and the tower body; the device has the effects that the spray head is convenient to maintain and replace, and the flue gas cooling treatment efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of waste gas treatment, and in particular to a flue gas cooling tower and a cooling process thereof. Background Art

[0002] With the rapid development of my country's industry, the demand for electricity is increasing. However, my country's current power generation methods mostly rely on boilers that use raw coal as fuel. However, the flue gas pollutants emitted by the combustion of raw coal in the boiler will cause great harm to the atmospheric environment, posing great challenges to my country's environmental governance. Therefore, flue gas pollutant treatment technology is becoming increasingly important.

[0003] In the related art, a flue gas cooling tower includes a cooling tower and a smoke delivery channel connected to the cooling tower to guide the high-temperature flue gas into the cooling tower. A plurality of groups of spray heads connected to an external water source are fixedly inserted on the top of the cooling tower to spray water mist to cool the high-temperature flue gas and reduce dust.

[0004] With respect to the above-mentioned related technologies, the inventors found that a large amount of heat will be released when high-temperature flue gas encounters the water mist sprayed from the sprinkler head. The high-temperature acidic environment can easily cause damage to the sprinkler head. Usually, the sprinkler head is fixedly installed on the cooling tower, which is very inconvenient to dismantle and repair the sprinkler head, so there is room for improvement. Summary of the invention

[0005] In order to improve the problem that the sprinkler head is inconvenient to maintain, the present application provides a flue gas cooling tower and a cooling process thereof.

[0006] In the first aspect, the present application provides a flue gas cooling tower, which adopts the following technical solution: A flue gas cooling tower comprises a tower body and a spray head arranged on the top of the tower body, wherein the tower body is connected with an air supply pipe for conveying flue gas; an installation opening is opened through the top of the tower body, a closing block for closing the installation opening is arranged at the tower body, and the spray head is arranged on the closing block; a fastening assembly is arranged between the closing block and the tower body for connecting the closing block and the tower body.

[0007] By adopting the above technical solution, the fastening assembly is used to realize the quick and convenient connection between the closing block and the tower body, and the convenient removal and replacement of the spray head is realized, which reduces the time wasted due to the inconvenient disassembly and assembly of the spray head and the tower body as an integral structure, thereby ensuring the working efficiency of the flue gas cooling.

[0008] Preferably, the fastening assembly includes a mounting plate, a fixing ring plate and a fastener; the mounting plate is arranged on the closing block, the fixing ring plate is arranged on the outer peripheral wall, and the fastener is passed through the mounting plate and the fixing ring plate to fix the mounting plate and the fixing ring plate in connection.

[0009] By adopting the above technical solution, the mounting plate is aligned with the fixing ring plate, and the fasteners fix the mounting plate and the fixing ring plate to achieve a fixed connection between the closing block and the tower body; when the sprinkler head inside the closing block needs to be replaced or cleaned and repaired, the fasteners can be disassembled to achieve quick removal and replacement of the sprinkler head.

[0010] Preferably, the outside of the tower body and the air supply pipe are covered with a cooling jacket, and a water flow space for water flow to pass through is reserved between the outer circumferential walls of the tower body and the air supply pipe and the inner circumferential wall of the cooling jacket; one end of the cooling jacket is connected to a water inlet pipe for inputting cooling water, and the other end of the cooling jacket is connected to a water outlet pipe for conveying cooling water.

[0011] By adopting the above technical scheme, the cooling jacket covers the tower body and the air supply pipe, and the water inlet pipe transports cooling water to the inside of the cooling jacket. The cooling water contacts the tower body and the air supply pipe to absorb the heat inside the tower body and the air supply pipe, thereby reducing the phenomenon of heat damage to the sprinkler head, ensuring the service life of the sprinkler head, and further accelerating the efficiency of the flue gas cooling treatment.

[0012] Preferably, the inner side wall of the cooling jacket is provided with a guide plate for limiting the direction of water flow, and the guide plate is extended in a spiral shape along the length direction of the cooling jacket.

[0013] By adopting the above technical solution, the guide plate limits the direction of cooling water inside the cooling jacket, ensuring that the cooling water flows to various parts inside the cooling jacket and cools them down, ensuring the uniformity of cooling of various parts inside the cooling jacket, reducing the temperature difference between various places, and improving the cooling treatment effect of the cooling water.

[0014] Preferably, an air inlet pipe for connecting to the air supply pipe is provided on the side wall of the tower body facing the air supply pipe, a docking sleeve is provided on the air supply pipe and the air inlet pipe, and a space is reserved between the air inlet pipe, the air supply pipe and the docking sleeve to allow for thermal expansion and deformation at the connection between the air inlet pipe and the air supply pipe; a sealing assembly for sealing the docking sleeve is provided between the air supply pipe and the air inlet pipe, and a cooling assembly is provided on the docking sleeve for cooling the docking sleeve.

[0015] By adopting the above technical scheme, the docking sleeve realizes a convenient connection between the air supply pipe and the air inlet pipe, and the space provided provides deformation space for the thermal expansion deformation of the docking sleeve, the air inlet pipe and the air supply pipe when they come into contact with high-temperature flue gas, so as to facilitate the axial and radial thermal expansion deformation of the air inlet pipe, the air supply pipe and the docking sleeve, thereby reducing the occurrence of thermal expansion and fracture at the connection between the air inlet pipe and the air supply pipe; the sealing component realizes the sealed connection between the air supply pipe and the air inlet pipe and the docking sleeve respectively; the cooling component pre-cools the docking sleeve, further reducing the temperature of the flue gas entering the tower body, and reducing the possibility of high-temperature damage to the sprinkler head.

[0016] Preferably, the sealing assembly includes a positioning ring plate and a sealing ring; the positioning ring plate is arranged at the ends of the air inlet pipe and the air supply pipe facing each other, the docking sleeve is located between the two groups of positioning ring plates, and the sealing ring is tightly arranged between the docking sleeve and each group of positioning ring plates.

[0017] By adopting the above technical solution, the sealing ring seals the connection between the air supply pipe and the air intake pipe and the docking sleeve, thereby ensuring the air tightness of the connection between the air supply pipe, the air intake pipe and the docking sleeve; In addition, the space provided makes it easy for the butt joint sleeve to be adjusted between the two sets of positioning ring plates along the radial direction and the axial direction of the positioning ring plates, thereby facilitating faster installation and use of the butt joint sleeve.

[0018] Preferably, the cooling component includes a spray plate, a water supply pipe, a water collecting tank and a drain pipe; the spray plate is arranged at the top of the docking sleeve, the water supply pipe is connected to the spray plate, the water collecting tank is arranged at the bottom of the docking sleeve for collecting cooling water, the drain pipe is arranged on the water collecting tank, and a drain outlet for connecting to the drain pipe is opened through the bottom of the water collecting tank.

[0019] By adopting the above technical solution, the water supply pipe supplies water to the spray plate, the spray plate sprays cooling water to cool the docking sleeve, the water collection tank collects the cooling water passing through the docking sleeve, and the cooling water inside the water collection tank is discharged through the drain pipe.

[0020] Preferably, the ends of the outlet pipe and the drain pipe are connected to an exchange box, a power pump is connected to the exchange box, the output end of the power pump is connected to the water supply pipe and the water inlet pipe, and a heat pipe for conveying heat transfer oil is passed through the inside of the exchange box.

[0021] By adopting the above technical scheme, the cooling water that has absorbed the heat of the exhaust gas inside the outlet pipe and the drain pipe flows into the exchange box, and the heat transfer pipe transports the heat transfer oil inside the exchange box. The flowing heat transfer oil recovers the heat of the high-temperature cooling water inside the exchange box that has absorbed the heat of the flue gas, thereby facilitating the reuse of the flue gas heat through the heat transfer oil; the cooling water after the heat transfer oil absorbs the heat is re-transported to the water supply pipe and the water inlet pipe through the power pump, thereby realizing the recycling of cooling water.

[0022] Preferably, a water tank covering the heating sleeve is provided on the water collecting trough, a guide sleeve is provided inside the water tank, a connecting rod is slidably penetrated inside the guide sleeve, a sealing ball for sealing the drain pipe is provided at the end of the connecting rod, and a buoyancy block is provided at the other end of the connecting rod; and when the cooling water inside the water tank submerges at least half of the docking sleeve, the buoyancy block pulls the sealing ball out of the drain pipe by its own buoyancy.

[0023] By adopting the above technical scheme, the water tank and the water collecting trough cover the docking sleeve, and the sealing ball seals the drain outlet, so that the water tank and the water collecting trough collect and temporarily store cooling water; the cooling water gradually submerges the lower half of the docking sleeve, and continuously cools the docking sleeve, reducing the risk of bursting caused by uneven cooling of the upper and lower parts of the docking sleeve, and ensuring the service life of the docking sleeve; when the cooling water inside the water tank submerges at least half of the docking sleeve, the buoyancy block drives the sealing ball to detach from the drain pipe to discharge the cooling water inside the water tank, thereby discharging the cooling water that absorbs superheat inside the water tank, ensuring the fluidity of the cooling water inside the water tank, so as to better cool the docking sleeve. In addition, the above arrangement ensures that the cooling water inside the water tank remains in a state of submerging at least half of the docking sleeve, so as to more stably cool the docking sleeve.

[0024] Second, The present application provides a cooling process of a flue gas cooling tower, comprising the following steps: Installation: The closing block is placed at the installation opening, and the fastening assembly fastens the closing block and the tower body; Spraying; the installation block fixes the spray head at the installation port, and the spray head sprays and cools the flue gas transported to the inside of the tower body by the air supply pipe; Disassembly: Disassemble the fastening assembly to quickly remove the closing block and the sprinkler head from the installation port.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The fastening assembly is provided to realize the quick and convenient connection between the closing block and the tower body, and the convenient disassembly and replacement of the sprinkler head is realized, which reduces the time wasted due to the inconvenient disassembly and assembly of the sprinkler head and the tower body as an integral structure, thereby ensuring the working efficiency of the flue gas cooling; 2. By setting up a cooling jacket to cover the tower body and the air supply pipe, and using cooling water to absorb the heat inside the tower body and on the air supply pipe, the phenomenon of heat damage to the sprinkler head is reduced, the service life of the sprinkler head is guaranteed, and the efficiency of flue gas cooling treatment is further accelerated; 3. The air supply pipe and the air intake pipe are conveniently connected by setting the docking sleeve, and the sealing component realizes the sealed connection between the air supply pipe and the air intake pipe and the docking sleeve respectively; the cooling component pre-cools the docking sleeve, further reducing the temperature of the flue gas entering the tower body and reducing the possibility of high-temperature damage to the sprinkler head. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a flue gas cooling tower and its cooling process in Example 1 of the present application.

[0027] Figure 2 It is a cross-sectional schematic diagram used to illustrate the connection relationship between the air supply pipe and the air intake pipe in Example 1.

[0028] Figure 3 It is a cross-sectional schematic diagram used to illustrate the connection relationship between the water storage tank and the docking sleeve in Example 2.

[0029] Figure 4 It is a cross-sectional schematic diagram used to illustrate the connection relationship between the exchange box and the heat pipe in Example 2.

[0030] Description of reference numerals: 1. Tower body; 11. Sprinkler head; 12. Air supply pipe; 13. Mounting port; 14. Closing block; 15. Air inlet pipe; 2. Fastening assembly; 21. Mounting plate; 22. Fixed ring plate; 23. Fasteners; 3. Cooling jacket; 31. Water flow space; 32. Water inlet pipe; 33. Water outlet pipe; 34. Guide plate; 4. Docking sleeve; 41. Make way space; 5. Sealing assembly; 51. Positioning ring plate; 52. Sealing ring; 6. Cooling assembly; 61. Spray plate; 62. Water supply pipe; 63. Water collecting trough; 631. Drain port; 64. Drain pipe; 7. Exchange box; 71. Power pump; 72. Heat transfer pipe; 8. Water storage tank; 81. Guide sleeve; 82. Connecting rod; 83. Blocking ball; 84. Buoyancy block. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-4 This application is described in further detail.

[0032] The embodiment of the present application discloses a flue gas cooling tower and a cooling process thereof, which are used for convenient maintenance and replacement of spray heads and improving the processing efficiency of flue gas cooling.

[0033] Embodiment 1: Reference Figure 1 and Figure 2A flue gas cooling tower includes a tower body 1 made of graphite and a spray head 11 installed on the top of the tower body 1. In this embodiment, the spray head 11 is connected to an external water source to spray the inside of the tower body 1. An air supply pipe 12 is installed on the side wall of the tower body 1 to transport flue gas to the inside of the tower body 1.

[0034] Reference Figure 1 and Figure 2 The top of the tower body 1 is provided with an installation opening 13 for the end of the spray head 11 to pass through. The tower body 1 is provided with a closing block 14 at the installation opening 13. In this embodiment, the closing block 14 can be made of graphite, and all the spray heads 11 are located on the closing block 14. A fastening assembly 2 is installed between the closing block 14 and the tower body 1 to fix the closing block 14 on the tower body 1.

[0035] Reference Figure 1 and Figure 2 The fastening assembly 2 includes a mounting plate 21, a fixing ring plate 22 and a fastener 23; the mounting plate 21 is fixedly connected to the side wall of the closing block 14 away from the tower body 1, and each group of sprinkler heads 11 passes through the mounting plate 21. The fixing ring plate 22 is fixedly connected to the outer peripheral wall of the tower body 1. In this embodiment, the fastening assembly 2 includes a bolt with a nut; the fastener 23 is inserted into the fixing ring plate 22 and the mounting plate 21 to fix the fixing ring plate 22 and the mounting plate 21.

[0036] Reference Figure 1 and Figure 2 The tower body 1 and the air supply pipe 12 are both sleeved with cooling jackets 3, and a water flow space 31 is reserved between the outer peripheral walls of the tower body 1 and the air supply pipe 12 and the inner peripheral wall of the cooling jacket 3 for water to flow through. In this embodiment, the fastener 23 penetrates the flange of the top peripheral wall of the cooling jacket 3 outside the tower body 1, and fixes the flange, the fixed ring plate 22 and the mounting plate 21. The cooling jacket 3 is welded and fixed with guide plates 34 to limit the direction of the water flow, and each set of guide plates 34 is spirally extended along the length direction of the cooling jacket 3.

[0037] Reference Figure 1 and Figure 2 One end of the cooling jacket 3 is welded to a water inlet pipe 32 to input cooling water into the cooling jacket 3. The other end of the cooling jacket 3 is welded to a water outlet pipe 33 to drain the cooling water inside the cooling jacket 3.

[0038] Reference Figure 1 and Figure 2The side wall of the tower body 1 facing the air supply pipe 12 is integrally formed with an air intake pipe 15 for connecting the air supply pipe 12. The air supply pipe 12 and the air intake pipe 15 are sleeved with a docking sleeve 4, so that the air intake pipe 15, the air supply pipe 12 and the docking sleeve 4 are interconnected, and a clearance space 41 is reserved between the air intake pipe 15, the air supply pipe 12 and the docking sleeve 4 for thermal expansion and deformation of the connection between the air intake pipe 15 and the air supply pipe 12.

[0039] Reference Figure 1 and Figure 2 A sealing assembly 5 is installed between the air supply pipe 12 and the air intake pipe 15 to seal the butt joint sleeve 4. The sealing assembly 5 includes a positioning ring plate 51 and a sealing ring 52; the positioning ring plate 51 is welded and fixed to the ends of the air intake pipe 15 and the air supply pipe 12 facing each other, and the butt joint sleeve 4 is located between the two sets of positioning ring plates 51. Each set of sealing rings 52 is tightly fitted between the butt joint sleeve 4 and the air intake pipe 15 and the air supply pipe 12, so that the butt joint sleeve 4 is tightly connected with the air intake pipe 15 and the air supply pipe 12.

[0040] Reference Figure 1 and Figure 2 A cooling assembly 6 is installed on the docking sleeve 4 for cooling the docking sleeve 4. The cooling assembly 6 includes a spray plate 61, a water supply pipe 62, a water collection tank 63 and a drain pipe 64; the spray plate 61 is installed on the top of the docking sleeve 4, and the water supply pipe 62 is connected and installed on the spray plate 61 to provide cooling water to the spray plate 61, so that the spray plate 61 sprays cooling water toward the docking sleeve 4 to cool it down.

[0041] Reference Figure 1 and Figure 2 The water collecting tank 63 is placed at the bottom of the docking sleeve 4 to collect the cooling water heated by the docking sleeve 4. A drain port 631 is provided through the bottom of the water collecting tank 63, and a drain pipe 64 is fixedly connected to the drain port 631 of the water collecting tank 63 to discharge the cooling water inside the water collecting tank 63.

[0042] The implementation principle of a flue gas cooling tower in Example 1 of the present application is: When the shower head 11 needs to be replaced, the fastener 23 can be loosened to facilitate the installation plate 21 to drive the closing block 14 and the shower head 11 to gradually move away from the installation opening 13, so as to clean and repair the shower head 11.

[0043] Install the new sprinkler head 11 on the closing block 14, place the closing block 14 at the mounting opening 13, and then install the fastener 23 on the mounting plate 21 and the fixing ring plate 22, so that the mounting plate 21 and the fixing ring plate 22 are fixedly connected, thereby realizing the rapid removal and replacement of the sprinkler head 11, thereby ensuring the processing efficiency of the flue gas cooling.

[0044] Example 1 of the present application also discloses a cooling process of a flue gas cooling tower, comprising the following steps: Installation: The closing block 14 is placed at the installation opening 13, and the fastening assembly 2 fastens the closing block 14 and the tower body 1; Spraying; the installation block fixes the spray head 11 at the installation port 13, and the spray head 11 sprays and cools the flue gas transported to the inside of the tower body 1 by the air supply pipe 12; Disassembly: The fastening assembly 2 is disassembled to enable the closing block 14 to drive the sprinkler head 11 to quickly detach from the installation opening 13 .

[0045] Embodiment 2: The difference between Example 2 and Example 1 is that: Figure 3 and Figure 4 A water storage tank 8 covering the heating jacket is fixedly connected to the water collection tank 63, and the spray plate 61 is located inside the water storage tank 8. A guide sleeve 81 is arranged inside the water storage tank 8, and the guide sleeve 81 is coaxially arranged with the drain port 631. A connecting rod 82 is slidably inserted inside the guide sleeve 81, and a blocking ball 83 is glued to one end of the connecting rod 82. In this embodiment, the blocking ball 83 can be made of easily deformable rubber to block the drain pipe 64.

[0046] Reference Figure 3 and Figure 4 In this embodiment, the inner diameter of the drain pipe 64 is larger than the inner diameter of the drain port 631, and the inner diameter of the drain pipe 64 is larger than the diameter of the blocking ball 83. When the air pressure and water pressure inside the water storage tank 8 are too high, the blocking ball 83 can be squeezed into the drain pipe 64, thereby ensuring that the water inside the water storage tank 8 is discharged normally.

[0047] Reference Figure 3 and Figure 4 The end of the connecting rod 82 away from the drain pipe 64 is glued and connected with a buoyancy block 84. In this embodiment, the buoyancy block 84 can be made of foam with a density less than that of water. When the cooling water inside the water storage tank 8 submerges at least half of the docking sleeve 4, the buoyancy block 84 in the cooling water exerts buoyancy on the connecting rod 82 and the blocking ball 83, so that the blocking ball 83 is separated from the blocking of the drain port 631, so that the cooling water inside the water storage tank 8 can be discharged through the drain port 631.

[0048] Reference Figure 3 and Figure 4The ends of the water outlet pipe 33 and the drain pipe 64 are connected together to install an exchange box 7 for collecting cooling water after absorbing heat. A heat pipe 72 for conveying heat-conducting oil is inserted inside the exchange box 7. In this embodiment, the heat pipe 72 can be made of copper with good thermal conductivity to collect and reuse the heat in the cooling water inside the exchange box 7. A power pump 71 is installed on the exchange box 7 through a pipeline. The output end of the power pump 71 is connected to the water supply pipe 62 and the water inlet pipe 32 through a pipeline to supply water to the water supply pipe 62 and the water inlet pipe 32.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A flue gas cooling tower, comprising a tower body (1) and a spray head (11) arranged on the top of the tower body (1), wherein the tower body (1) is connected to an air supply pipe (12) for conveying flue gas; characterized in that: The tower body (1) has a mounting opening (13) formed through the top thereof, a closing block (14) for closing the mounting opening (13) being arranged at the mounting opening (13) of the tower body (1), and the spray head (11) is arranged on the closing block (14); a fastening assembly (2) is arranged between the closing block (14) and the tower body (1) for connecting the closing block (14) and the tower body (1).

2. A flue gas cooling tower according to claim 1, characterized in that: The fastening assembly (2) comprises a mounting plate (21), a fixing ring plate (22) and a fastener (23); the mounting plate (21) is arranged on the closing block (14), the fixing ring plate (22) is arranged on the outer peripheral wall of the tower body (1), and the fastener (23) is penetrated through the mounting plate (21) and the fixing ring plate (22) to fix the mounting plate (21) and the fixing ring plate (22) in connection.

3. A flue gas cooling tower according to claim 1, characterized in that: The tower body (1) and the air supply pipe (12) are both covered with a cooling jacket (3) on the outside, and a water flow space (31) for water flow to pass through is reserved between the outer peripheral walls of the tower body (1) and the air supply pipe (12) and the inner peripheral wall of the cooling jacket (3); one end of the cooling jacket (3) is connected to a water inlet pipe (32) for inputting cooling water, and the other end of the cooling jacket (3) is connected to a water outlet pipe (33) for conveying cooling water.

4. A flue gas cooling tower according to claim 3, characterized in that: The inner side wall of the cooling jacket (3) is provided with a guide plate (34) for limiting the direction of water flow, and the guide plate (34) is extended in a spiral shape along the length direction of the cooling jacket (3).

5. A flue gas cooling tower according to claim 3, characterized in that: An air inlet pipe (15) for connecting to the air supply pipe (12) is provided on the side wall of the tower body (1) facing the air supply pipe (12); a docking sleeve (4) is provided on the air supply pipe (12) and the air inlet pipe (15) together; and a clearance space (41) is reserved between the air inlet pipe (15), the air supply pipe (12) and the docking sleeve (4) for thermal expansion and deformation at the connection between the air inlet pipe (15) and the air supply pipe (12); a sealing component (5) for sealing the docking sleeve (4) is provided between the air supply pipe (12) and the air inlet pipe (15); and a cooling component (6) is provided on the docking sleeve (4) for cooling the docking sleeve (4).

6. A flue gas cooling tower according to claim 5, characterized in that: The sealing assembly (5) comprises a positioning ring plate (51) and a sealing ring (52); the positioning ring plate (51) is arranged at the ends of the air intake pipe (15) and the air supply pipe (12) facing each other, the docking sleeve (4) is located between the two groups of positioning ring plates (51), and the sealing ring (52) is tightly arranged between the docking sleeve (4) and each group of positioning ring plates (51).

7. A flue gas cooling tower according to claim 5, characterized in that: The cooling component (6) comprises a spray plate (61), a water supply pipe (62), a water collecting tank (63) and a drainage pipe (64); the spray plate (61) is arranged on the top of the docking sleeve (4), the water supply pipe (62) is connected to the spray plate (61), the water collecting tank (63) is arranged at the bottom of the docking sleeve (4) for collecting cooling water, the drainage pipe (64) is arranged on the water collecting tank (63), and a drainage port (631) for connecting to the drainage pipe (64) is opened through the bottom of the water collecting tank (63).

8. A flue gas cooling tower according to claim 7, characterized in that: The ends of the water outlet pipe (33) and the drain pipe (64) are connected to an exchange box (7), and a power pump (71) is connected to the exchange box (7). The output end of the power pump (71) is connected to the water supply pipe (62) and the water inlet pipe (32), and a heat conduction pipe (72) for conveying heat conduction oil is penetrated inside the exchange box (7).

9. A flue gas cooling tower according to claim 7, characterized in that: The water collecting trough (63) is provided with a water storage tank (8) covering the heating sleeve, the water storage tank (8) is provided with a guide sleeve (81) inside, a connecting rod (82) is slidably penetrated inside the guide sleeve (81), a sealing ball (83) for sealing the drain pipe (64) is provided at the end of the connecting rod (82), and a buoyancy block (84) is provided at the other end of the connecting rod (82); and when the cooling water inside the water storage tank (8) submerges at least half of the docking sleeve (4), the buoyancy block (84) pulls the sealing ball (83) away from the drain pipe (64) by its own buoyancy.

10. A cooling process for a flue gas cooling tower according to any one of claims 1 to 9, characterized in that: The steps include: Installation: The closing block (14) is placed at the installation opening (13), and the fastening assembly (2) fastens the closing block (14) and the tower body (1); Spraying; the installation block fixes the spray head (11) at the installation opening (13), and the spray head (11) sprays and cools the flue gas transported to the inside of the tower body (1) by the air supply pipe (12); Disassembly: The fastening assembly (2) is disassembled to enable the closing block (14) to drive the shower head (11) to quickly detach from the installation opening (13).

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