Air cooler, air cooler system and delayed coking system

Abstract

The utility model relates to the technical field of heat exchange equipment, and discloses an air cooler, an air cooler system and a delayed coking system.The air cooler comprises a shell, a finned tube set, a heating tube, a draught fan and a shutter, an air inlet is formed in the bottom of the shell, an air outlet is formed in the top of the shell, the finned tube set is arranged in the shell and comprises a tube body and fins, the tube body is an oval tube, and the fins are arranged in the tube body. The fin is arranged on the outer wall of the tube body, the finned tube set is located between the air inlet and the air outlet, the heating tube is arranged in the shell, the heating tube is located below the finned tube set, the fan is arranged in the shell, the fan is located below the heating tube, and the shutters are arranged at the air inlet and the air outlet. When the coke tower is in an intermittent state, the shutters are closed, the heating pipes are started to generate heat to preserve heat of the finned tube set, and the finned tube set is prevented from being blocked due to oil gas medium solidification caused by low temperature in winter.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange equipment, in particular to an air cooler, an air cooler system and a delayed coking system. Background Art

[0002] Air cooler is a device that uses ambient air as the cooling medium and passes across the outer wall of the finned tube to cool or condense the high-temperature process fluid in the tube. It is widely used in industrial production such as petrochemical, coal chemical, and thermal power plants.

[0003] The air cooler usually includes a fin tube group and a fan. When the air cooler is working, the bottom fan blows air from bottom to top, and the air enters from the bottom of the air cooler to cool the fin tube group.

[0004] In coal coking production, due to the particularity of the intermittent operation of the coke tower in the delayed coking system, the venting system is also operated intermittently. With the large steam blowing and coke cooling operations in the coke tower, the temperature of the coke gradually decreases, and the composition, temperature and flow rate of the oil-gas mixture entering the venting tower are constantly changing. In addition to a large amount of water vapor, fuel gas and light component oil, the oil-gas mixture also contains some heavy distillate oil and a certain amount of coke powder. The high-temperature oil-gas mixture is transported to the fin tube group for cooling.

[0005] In the prior art, the oil-gas mixture can easily adhere to the inner wall of the air-cooling tube bundle of the finned tube group, causing wax hanging on the air-cooling tube bundle and blockage. Especially in winter, if the temperature in the air cooler is too low, the air-cooling tube bundle will freeze or even crack, making it impossible for the air cooler to operate normally. Utility Model Content

[0006] In view of this, the utility model provides an air cooler, an air cooler system and a delayed coking system to solve the problem in the prior art that the temperature in the air cooler is too low in winter, which easily causes the air cooling tube bundle to freeze or even crack, making the air cooler unable to operate normally.

[0007] In the first aspect, the utility model provides an air cooler, including a shell, a fin tube group, a heating tube, a fan and a shutter. An air inlet is provided at the bottom of the shell, an air outlet is provided at the top of the shell, the fin tube group is arranged in the shell, the fin tube group includes a tube body and fins, the tube body is an elliptical tube, the fins are arranged on the outer wall of the tube body, the fin tube group is located between the air inlet and the air outlet, the heating tube is arranged in the shell, the heating tube is located below the fin tube group, the fan is arranged in the shell, the fan is located below the heating tube, and the shutters are arranged at the air inlet and the air outlet.

[0008] Beneficial effects: The utility model arranges a heating tube in the shell. In the cold winter, when the coke tower is in an intermittent state, the shutters are closed and the heating tubes are started to generate heat to insulate the fin tube group, thereby preventing the fin tube group from being blocked due to solidification of the oil and gas medium caused by the low temperature in winter. At the same time, the air volume passing through the fin tube group can be adjusted by adjusting the opening of the shutters in different seasons to achieve the best cooling effect on the fin tube group.

[0009] In an optional embodiment, the fin tube group further includes two tube boxes and a mounting frame, a plurality of tube bodies are arranged in parallel, two ends of the plurality of tube bodies are respectively connected to the tube boxes, and the tube boxes are arranged on the mounting frame.

[0010] Beneficial effects: The utility model combines a plurality of parallel pipe bodies into an aggregate through a pipe box, which is used to distribute and guide the fluid, thereby realizing cooling of the fluid in each pipe body and improving the cooling efficiency.

[0011] In an optional embodiment, the major axes or minor axes of adjacent tubes are arranged in a staggered manner.

[0012] Beneficial effects: The utility model intensifies the disturbance of the fluid in the tube body, destroys the boundary layer of the fluid on the outer wall of the tube body, strengthens the heat transfer intensity of the fluid on the outer wall of the tube body, and plays a role in energy saving and consumption reduction by staggered arrangement of the long axes or short axes of adjacent tube bodies.

[0013] In an optional embodiment, the major axes or minor axes of adjacent tubes are arranged vertically.

[0014] Beneficial effects: The utility model increases the gap between the outer walls of adjacent tube bodies by arranging the long axes or short axes of adjacent tube bodies vertically, so that more airflow can pass through the gap, thereby improving the cooling efficiency.

[0015] In an optional embodiment, the fins are vertically or spirally arranged on the outer wall of the tube body.

[0016] Beneficial effects: The utility model increases the contact area between the fins and the air by vertically or spirally arranging the fins on the outer wall of the tube body, thereby further improving the efficiency of heat exchange.

[0017] In an optional embodiment, the heating tubes are arranged in a "snake" shape.

[0018] Beneficial effect: The utility model arranges the heating tubes in a "snake" shape, which can increase the distance between the heating tubes, thereby improving the heat exchange effect, and can quickly generate sufficient heat in the shell in the cold winter.

[0019] In an optional embodiment, the fan includes a fan blade and a first driver, the first driver is fixedly installed inside the shell, and the fan blade is installed at the dynamic driving end of the first driver.

[0020] In an optional embodiment, the shutter includes a bracket, blades, a connecting rod and a second driver, the bracket is fixedly mounted at the air inlet and the air outlet, a plurality of blades are movably mounted on the bracket, the connecting rod is movably connected to the plurality of blades, the second driver is connected to the connecting rod, and the second driver is suitable for being connected to a controller signal.

[0021] Beneficial effect: The utility model arranges a driver on the shutters. In the cold winter, when the coke drum is in an intermittent state, the driver can be controlled by a controller signal to close the shutters, thereby maintaining the temperature inside the shell and preventing the pipe body from freezing or cracking.

[0022] In a second aspect, the utility model further provides an air cooler system, including a venting tower, a controller and the above-mentioned air cooler, wherein the venting tower is connected to the fin tube group, the controller is connected to the venting tower signal, and the controller is connected to the shutter signal.

[0023] In a third aspect, the utility model also provides a delayed coking system, including at least two coking towers and the above-mentioned air cooler system, wherein a controller is connected to the coking tower signals and is suitable for controlling the coking towers to operate alternately, and a venting tower is connected to the coking tower.

[0024] Beneficial effects: Since the air cooler system and the delayed coking system adopt the air cooler in the utility model, they have the same beneficial effects as the air cooler, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 This is a front view of an air cooler according to an embodiment of the utility model;

[0027] Figure 2 This is an axial cross-sectional view of a tube body in an air cooler according to an embodiment of the utility model;

[0028] Figure 3 This is a radial cross-sectional view of a tube body in an air cooler according to an embodiment of the utility model;

[0029] Figure 4 This is a front view of a fin tube group in an air cooler according to an embodiment of the utility model;

[0030] Figure 5 for Figure 4 Sectional view along the AA direction;

[0031] Figure 6 A side view of a shutter in an air cooler according to an embodiment of the utility model;

[0032] Figure 7 The utility model is a top view of a heating tube in an air cooler according to an embodiment of the utility model.

[0033] Description of reference numerals:

[0034] 1. Shell; 101. Air inlet; 102. Air outlet;

[0035] 2. Fin tube group; 201. tube body; 202. fin; 203. tube box; 204. mounting frame;

[0036] 3. Heating tube;

[0037] 4. fan; 401. fan blade; 402. first driver;

[0038] 5. Venetian blinds; 501. bracket; 502. blades; 503. connecting rod. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0040] Combine the following Figures 1 to 7 , describing an embodiment of the utility model.

[0041] According to an embodiment of the present utility model, on the one hand, as Figures 1 to 7 As shown, an air cooler is provided, including a shell 1, a fin tube group 2, a heating tube 3, a fan 4 and a shutter 5. The shell 1 is provided with an air inlet 101 at the bottom, and an air outlet 102 is provided at the top of the shell 1. The fin tube group 2 is arranged in the shell 1, and the fin tube group 2 includes a tube body 201 and fins 202. The tube body 201 is an elliptical tube, and the fins 202 are arranged on the outer wall of the tube body 201. The fin tube group 2 is located between the air inlet 101 and the air outlet 102. The heating tube 3 is arranged in the shell 1, and the heating tube 3 is located below the fin tube group 2. The fan 4 is arranged in the shell 1, and the fan 4 is located below the heating tube 3. The shutter 5 is arranged at the air inlet 101 and the air outlet 102.

[0042] Specifically, the housing 1 is not specifically limited in this embodiment. To meet the actual situation, the housing 1 in this embodiment adopts a rectangular structure, with an air inlet 101 at the bottom of the housing 1 and an air outlet 102 at the top of the housing 1. In other embodiments, the housing 1 can also be set to other shapes according to actual conditions.

[0043] In this embodiment, the fin tube group 2 is arranged inside the shell 1, and one end of the fin tube group 2 is connected to the venting tower, which is used to transport the high-temperature oil-gas mixture in the venting tower to the tube body 201 in the fin tube group 2, and exchange heat with the air in the environment through the tube body 201 and the fins 202 on the outer wall of the tube body 201, thereby reducing the temperature of the oil-gas mixture.

[0044] In this embodiment, Figure 2 and Figure 5 As shown, the cross section of the tube body 201 of the fin tube group 2 is elliptical. Compared with the tube body 201 with a circular cross section, the heat transfer effect of the elliptical tube is improved. For a circular tube with the same circumference, since the flow cross-sectional area of ​​the elliptical tube is smaller than that of the circular tube, if the flow rate remains unchanged, the disturbance is strengthened, and the convective heat transfer in the tube is enhanced. For the situation outside the tube body 201, from the perspective of the position of the fluid separation point and the development of the boundary layer, the average heat transfer effect outside the elliptical tube is always better than that of the circular tube. Since the ellipse is similar to a streamline, the resistance of the fluid when it sweeps outward is small, and the flow rate can be increased while allowing the same flow resistance, so the external heat transfer can also be enhanced. Under the same flow area, the heat transfer perimeter of the elliptical tube is long, and the heat exchange area is correspondingly increased. The structure also allows for a more compact arrangement, which increases the heat transfer per unit volume.

[0045] In this embodiment, the material of the fin tube group 2 is not specifically limited. To improve the heat exchange efficiency, the material of the fin tube group 2 in this embodiment can be copper or aluminum.

[0046] In this embodiment, the fan 4 is arranged inside the shell 1 near the bottom air inlet 101, the heating tube 3 is arranged inside the shell 1 above the fan 4, the fin tube group 2 is arranged inside the shell 1 above the heating tube 3, and shutters 5 are respectively installed at the air inlet 101 and the air outlet 102.

[0047] The utility model arranges a heating tube 3 in a shell 1. In the cold winter, when the coke drum is in an intermittent state, the shutter 5 is closed and the heating tube 3 is started to generate heat to keep the fin tube group 2 warm, so as to prevent the fin tube group 2 from being blocked due to the solidification of the oil and gas medium caused by the low temperature in winter. At the same time, the air volume passing through the fin tube group 2 can be adjusted by adjusting the opening of the shutter 5 in different seasons, so as to achieve the best cooling effect on the fin tube group 2.

[0048] In one embodiment, Figure 4As shown, the fin tube group 2 further includes two tube boxes 203 and a mounting frame 204 , a plurality of tube bodies 201 are arranged in parallel, two ends of the plurality of tube bodies 201 are respectively connected to the tube boxes 203 , and the tube boxes 203 are arranged on the mounting frame 204 .

[0049] Specifically, in this embodiment, a plurality of tube bodies 201 in the fin tube group 2 are arranged horizontally in parallel, and both ends of the tube body 201 are respectively connected to the tube box 203, one of the tube boxes 203 is connected to the vent tower, and is used to transport the high-temperature oil-gas mixture in the vent tower to the tube body 201, and another tube box 203 is provided with an outlet for outputting the cooled oil-gas mixture product. The tube box 203 is arranged on a mounting frame 204, and the mounting frame 204 is installed inside the housing 1.

[0050] In this embodiment, a tube sheet is provided in the tube box 203, and the tube body 201 and the tube sheet can be connected by expansion welding.

[0051] The utility model combines a plurality of parallel tube bodies 201 into a collection through a tube box 203 for distributing and guiding fluid, thereby realizing cooling of the fluid in each tube body 201 and improving the cooling efficiency.

[0052] In one embodiment, Figure 5 As shown, the major axes or minor axes of adjacent tubes 201 are arranged alternately.

[0053] Specifically, in this embodiment, the axial cross-section of the tube body 201 is elliptical, and the major axes or minor axes of the ellipses on the cross-sections of adjacent tube bodies 201 are arranged in a staggered manner, so that there is a larger gap between adjacent tube bodies 201.

[0054] The utility model strengthens the disturbance of the fluid in the tube body 201 by staggering the long axes or short axes of adjacent tube bodies 201, destroys the boundary layer of the fluid on the outer wall of the tube body 201, strengthens the heat transfer intensity of the fluid on the outer wall of the tube body 201, and plays a role in energy saving and consumption reduction.

[0055] In one embodiment, Figure 5 As shown, the major axes or minor axes of adjacent tubes 201 are arranged vertically.

[0056] Specifically, in this embodiment, the axial cross-section of the tube body 201 is elliptical, and the major axis or minor axis of the ellipse on adjacent tube body 201 cross-sections is arranged vertically, that is, one tube body 201 cross-section is vertically arranged along the major axis direction, and the major axis of the adjacent tube body 201 cross-section is arranged horizontally.

[0057] The utility model arranges the long axes or short axes of adjacent tube bodies 201 vertically, thereby increasing the gap between the outer walls of adjacent tube bodies 201, so that more airflow can pass through the gap, thereby improving the cooling efficiency.

[0058] In one embodiment, Figure 2 and Figure 3 As shown, the fins 202 are vertically or spirally arranged on the outer wall of the tube body 201 .

[0059] Specifically, in this embodiment, the fin 202 is vertically or spirally arranged on the outer wall of the tube body 201. The fin 202 can be "L" shaped, and a bending portion is provided at one end of the fin 202. The bending portion is continuously spirally wound on the outer surface of the tube body 201 under the action of tension. This form of fin 202 has a simple structure and low manufacturing cost. The fin 202 can also be "LL" shaped. On the basis of the "L" shape, the bending portion of the fin 202 completely covers the outer surface of the tube body 201. This type of fin The 202 type can ensure better corrosion resistance; the fin 202 can also adopt the "KL" type. Before the fin 202 is continuously wound on the surface of the tube body 201, the outer surface of the tube body 201 is knurled. When the fin 202 is wound on the tube body 201, the fin 202 is knurled at the bent part to strengthen the combination of the tube body 201 and the fin 202. This type of fin 202 has better heat transfer characteristics than the "L" type and "LL" type fin 202.

[0060] The utility model increases the contact area between the fins 202 and the air by vertically or spirally arranging the fins 202 on the outer wall of the tube body 201, thereby further improving the heat exchange efficiency.

[0061] In one embodiment, Figure 7 As shown, the heating tubes 3 are arranged in a "snake" shape.

[0062] Specifically, the heating tubes 3 in the related art mostly adopt a spiral coil structure. In this embodiment, the heating tubes 3 are arranged in an "S"-shaped "snake" shape, so that the distance between the heating tubes 3 in this embodiment is more than three times larger than the coil spacing in the related art.

[0063] In this embodiment, the heating tube 3 can be a steam tube, and high-temperature steam is passed into the heating tube 3.

[0064] The utility model arranges the heating tubes 3 in a "snake" shape, which can increase the distance between the heating tubes 3, thereby improving the heat exchange effect, and can quickly generate sufficient heat in the shell 1 in cold winter.

[0065] In one embodiment, Figure 1 As shown, the fan 4 includes a fan blade 401 and a first driver 402 . The first driver 402 is fixedly installed inside the housing 1 , and the fan blade 401 is installed at the dynamic driving end of the first driver 402 .

[0066] Specifically, in this embodiment, the fan 4 adopts an axial flow fan 4, the air flow direction is in the same direction as the axis of the fan blade 401, the first driver 402 adopts a motor, and the fan blade 401 is installed on the driving end of the motor. When the motor drives the fan blade 401 to rotate, the air in the external environment is blown into the shell 1 from the air inlet 101 at the bottom of the shell 1, and is discharged from the air outlet 102 at the top of the shell 1 after heat exchange through the fin tube group 2.

[0067] In one embodiment, Figure 6 As shown, the shutter 5 includes a bracket 501, blades 502, a connecting rod 503 and a second driver. The bracket 501 is fixedly installed at the air inlet 101 and the air outlet 102. A plurality of blades 502 are movably installed on the bracket 501. The connecting rod 503 is movably connected to the plurality of blades 502. The second driver is connected to the connecting rod 503, and the second driver is suitable for being connected to a controller signal.

[0068] Specifically, in this embodiment, two brackets 501 are respectively fixedly installed at the air inlet 101 and the air outlet 102 of the shell 1, and multiple blades 502 are arranged in parallel. Both ends of the blades 502 are hinged to the mounting frame 204, and the connecting rod 503 is hinged to the multiple blades 502. The opening between the multiple blades 502 can be controlled by pulling the connecting rod 503 by the second driver, thereby achieving different air inlet and outlet volumes. At the same time, the air volume passing through the fin tube group 2 can be adjusted by adjusting the opening of the shutter 5 in different seasons to achieve the best cooling effect on the fin tube group 2.

[0069] The utility model sets a driver on the shutter 5. In the cold winter, when the coke drum is in an intermittent state, the driver can be controlled by a controller signal to close the shutter 5, thereby maintaining the temperature in the shell 1 and preventing the pipe body 201 from freezing or cracking.

[0070] According to an embodiment of the utility model, on the other hand, an air cooler system is also provided, including a venting tower, a controller and the above-mentioned air cooler, the venting tower is connected to the fin tube group 2, the controller is connected to the venting tower signal, and the controller is connected to the shutter 5 signal.

[0071] According to an embodiment of the utility model, on the other hand, a delayed coking system is provided, comprising at least two coking towers and the above-mentioned air cooler system, wherein a controller is connected to the coking tower signals and is suitable for controlling the coking towers to operate alternately, and a venting tower is connected to the coking tower.

[0072] Specifically, in this embodiment, the coking tower is used for coking coal, and the controller controls the two coking towers to work alternately. When one coking tower is coking, the other coking tower is cooling. During this process, the coking tower is blown with large steam to transport the oil-gas mixture from the coking tower to the venting tower. The venting tower is connected to the air cooler, and the high-temperature oil-gas mixture is then transported to the air cooler for cooling.

[0073] When the coke tower in the delayed coking system is in intermittent operation, the air cooler system is also in intermittent operation. When the coke tower is in large steam blowing and coke cooling operation, the temperature of coke gradually decreases, and the composition, temperature and flow rate of the oil-gas mixture entering the venting tower are constantly changing. In addition to containing a large amount of water vapor, fuel gas and light component oil, it also contains some heavy fraction oil and a certain amount of coke powder, which are easy to adhere to the inner wall of the fin tube group 2, causing wax hanging and blockage on the inner wall of the fin tube group 2. Therefore, the air cooler fin tube group 2 at the top of the venting tower is very prone to flow deviation, and the load of the air cooler is constantly changing during operation.

[0074] In winter, when the air cooler stops working, the controller timely adjusts the opening and closing of the shutter 5 so that the heat generated by the heating tube 3 is accumulated inside the shell 1, which can prevent the fin tube group 2 from freezing and cracking, thereby ensuring the normal operation of the air cooler. When the air cooler is started again, the controller controls the shutter 5 to open, so that the air inlet 101 and the air outlet 102 can normally enter and exhaust air. Since the shell 1 always maintains a high temperature when the air cooler stops working, the fin tube group 2 is not affected by freezing and cracking, and heat exchange can be carried out quickly, thereby improving the heat exchange efficiency.

[0075] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. An air cooler, characterized in that: include: A shell (1), wherein an air inlet (101) is provided at the bottom of the shell (1), and an air outlet (102) is provided at the top of the shell (1); A fin tube group (2), the fin tube group (2) being arranged in the shell (1), the fin tube group (2) comprising a tube body (201) and fins (202), the tube body (201) being an elliptical tube, the fins (202) being arranged on the outer wall of the tube body (201), and the fin tube group (2) being located between the air inlet (101) and the air outlet (102); A heating tube (3), wherein the heating tube (3) is arranged in the shell (1), and the heating tube (3) is located below the fin tube group (2); A fan (4), the fan (4) being arranged in the housing (1), and the fan (4) being located below the heating tube (3); A louver (5), wherein the louver (5) is arranged at the air inlet (101) and the air outlet (102).

2. The air cooler according to claim 1, characterized in that: The fin tube assembly (2) further comprises: Two pipe boxes (203), a plurality of pipe bodies (201) are arranged in parallel, and two ends of the plurality of pipe bodies (201) are respectively connected to the pipe boxes (203); A mounting frame (204), wherein the pipe box (203) is arranged on the mounting frame (204).

3. The air cooler according to claim 2, characterized in that: The major axes or minor axes of adjacent tubes (201) are arranged in a staggered manner.

4. The air cooler according to claim 3, characterized in that: The major axes or minor axes of adjacent tubes (201) are arranged vertically.

5. The air cooler according to claim 1, characterized in that: The fins (202) are arranged vertically or spirally on the outer wall of the tube body (201).

6. The air cooler according to claim 1, characterized in that: The heating tubes (3) are arranged in a "snake" shape.

7. The air cooler according to claim 1, characterized in that: The fan (4) comprises: Fan blade (401); A first driver (402), wherein the first driver (402) is fixedly mounted inside the housing (1), and the fan blade (401) is mounted at a driving end of the first driver (402).

8. The air cooler according to claim 1, characterized in that: The shutter (5) comprises: A bracket (501), the bracket (501) being fixedly mounted at the air inlet (101) and the air outlet (102); Blades (502), a plurality of blades (502) are movably mounted on the bracket (501); A connecting rod (503), wherein the connecting rod (503) is movably connected to the plurality of blades (502); A second driver is connected to the connecting rod (503), and the second driver is suitable for being connected to a controller signal.

9. An air cooler system, characterized in that: include: A venting tower, the venting tower is connected to the fin tube group (2); A controller, the controller being connected to the vent tower signal; The air cooler according to any one of claims 1 to 8, wherein the controller is connected to the shutter (5) by signal.

10. A delayed coking system, characterized in that: include: At least two coking towers, the controller is connected to the coking towers by signals and is suitable for controlling the coking towers to operate alternately; In the air cooler system of claim 9, the vent tower is connected to the coking tower.

Images