Anti-freezing anti-corrosion auxiliary device for breather valve system of oil storage tank

Abstract

The utility model provides an oil storage tank breather valve system anti-freezing anti-corrosion auxiliary device which comprises a shell, an air inlet, an air outlet and a heat exchange assembly, the upper end of the shell is provided with an upper scavenging port, a breather valve system is communicated with the shell through the upper scavenging port, the lower end of the shell is provided with a lower scavenging port, and the air inlet is communicated with the air outlet through the lower scavenging port. The oil storage tank is communicated with the shell through the lower scavenging port; the heat exchange assembly is arranged in the shell, and the heat exchange assembly communicates with the air inlet and the air outlet. According to the device, the temperature of gas in the oil storage tank passing through the device is reduced, water vapor in the oil storage tank is reduced, condensation and freezing blockage of the water vapor at the fire-retardant net and the breather valve are avoided, and normal operation of the oil storage tank in a low-temperature environment in winter is ensured. And the inner surface of the shell and the surface of the heat exchange assembly are subjected to surface nickel-base alloy plating treatment, so that the corrosion resistance is improved, and the service life of the device is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of petrochemical storage and transportation safety equipment, in particular to a corrosion-resistant auxiliary device for antifreezing a breathing valve system of an oil storage tank. Background Art

[0002] The breathing valve system of the oil storage tank is a key component to ensure the safety of the oil storage system and is widely used in the oil industry. Usually, the breathing valve system of the oil storage tank includes a breathing valve and a flame arrester. The breathing valve is used to adjust the pressure inside the storage tank, and the flame arrester is used to prevent external flames from entering the storage tank and prevent fires or explosions caused by internal flammable gases or liquids. However, during the low temperature period in winter, since the gas in the oil storage tank contains moisture, it is easy to condense and freeze in the small gap between the metal corrugated steel belt in the flame arrester and between the valve core and the valve seat of the breathing valve in a low temperature environment, thereby blocking the fire arrester net and the breathing valve, causing the breathing valve system to lose its function of adjusting the pressure of the oil storage tank, and then causing the tank to be deflated or burst.

[0003] Therefore, a corrosion-resistant auxiliary device for antifreezing of an oil storage tank breathing valve system is needed. Utility Model Content

[0004] The utility model aims to provide an anti-freezing corrosion-resistant auxiliary device for an oil storage tank breathing valve system, which can improve the anti-freezing performance of the oil storage tank breathing valve system and ensure the normal operation of the oil storage tank in a low temperature environment in winter.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A corrosion-resistant auxiliary device for antifreezing a breathing valve system of an oil storage tank, the device comprising a shell, an air inlet, an air outlet and a heat exchange component, wherein an upper air exchange port is provided at the upper end of the shell, and the breathing valve system is connected to the shell through the upper air exchange port, and a lower air exchange port is provided at the lower end of the shell, and the oil storage tank is connected to the shell through the lower air exchange port; the heat exchange component is provided inside the shell, and the heat exchange component is connected to both the air inlet and the air outlet.

[0007] Furthermore, in the above-mentioned corrosion-resistant auxiliary device for antifreeze of the oil tank breathing valve system, the heat exchange assembly includes a first air collecting plate, a second air collecting plate and a heat exchange tube, the first air collecting plate is located above the second air collecting plate, the air inlet is connected to the first air collecting plate through the ventilation tube, the air outlet is connected to the second air collecting plate through the ventilation tube, and the first air collecting plate and the second air collecting plate are connected through a plurality of heat exchange tubes.

[0008] Furthermore, in the above-mentioned corrosion-resistant auxiliary device for antifreeze of the oil storage tank breathing valve system, the heat exchange components are provided in plurality, the air inlets are provided in plurality, and the air outlets are provided in plurality, and each heat exchange component corresponds to one air inlet and one air outlet; the heat exchange component is provided with one or more of the first air collecting plates, the cross-section of the first air collecting plates is fan-shaped, and the cross-section of the whole formed by the combination of all the first air collecting plates is circular, the ventilation pipe includes a ventilation straight pipe and a ventilation bend pipe, and the air inlet is connected to one of the first air collecting plates through a ventilation straight pipe or a ventilation bend pipe.

[0009] Furthermore, in the above-mentioned corrosion-resistant auxiliary device for antifreeze of the oil tank breathing valve system, the heat exchange component is provided with one or more second air collecting plates, the cross-section of the second air collecting plates is fan-shaped, and the cross-section of the whole formed by the combination of all the second air collecting plates is circular; the number of the first air collecting plates and the second air collecting plates in one heat exchange component is the same; the air outlet is connected to one of the second air collecting plates through a straight ventilation pipe or a curved ventilation pipe.

[0010] Furthermore, in the above-mentioned corrosion-resistant auxiliary device for antifreeze of the oil storage tank breathing valve system, the opening end of the air inlet faces upward, and a non-powered wind hood is provided at the upper end of the air inlet; the opening end of the air outlet faces downward.

[0011] Furthermore, in the above-mentioned corrosion-resistant auxiliary device for antifreeze of the oil storage tank breathing valve system, the heat exchange tube is a copper tube, and several of the heat exchange tubes are evenly distributed between the first gas collecting plate and the second gas collecting plate, and the distance between the axes of two adjacent heat exchange tubes is 30mm to 40mm.

[0012] Furthermore, in the above-mentioned corrosion-resistant auxiliary device for antifreeze of the oil storage tank breathing valve system, the shell is composed of an upper cylinder and a lower cylinder, and the lower end of the upper cylinder is connected to the upper end of the lower cylinder.

[0013] Furthermore, in the above-mentioned corrosion-resistant auxiliary device for antifreeze of the oil storage tank breathing valve system, the upper end of the upper cylinder shrinks toward the central axis of the shell to form the upper ventilation port, and the upper end of the upper ventilation port is connected to the breathing valve system through a flange; the lower end of the lower cylinder shrinks toward the central axis of the shell to form the lower ventilation port, and the lower end of the lower ventilation port is connected to the outlet pipe of the oil storage tank through a flange.

[0014] Furthermore, in the above-mentioned corrosion-resistant auxiliary device for antifreeze of the oil storage tank breathing valve system, the heat exchange component also includes two horizontal spoilers, a spiral spoiler and a connecting column; the two horizontal spoilers are respectively arranged at the two ends of the connecting column, and the connecting column is vertically arranged in the shell; one horizontal spoiler is located above the first air collecting plate and close to the upper air exchange port, and the other horizontal spoiler is located below the second air collecting plate and close to the lower air exchange port; the spiral spoiler is connected to the connecting column and is located between the two horizontal spoilers. The spiral spoiler is arranged in a spiral shape, the lower end of the spiral spoiler is connected to the second air collecting plate, the upper end of the spiral spoiler is connected to the first air collecting plate, and the spiral pitch angle of the spiral spoiler is 5°~10°; a plurality of through holes for the heat exchange tubes to pass through are arranged on the spiral spoiler; the connecting column is composed of an upper column and a lower column, and the lower end of the upper column is connected to the upper end of the lower column; the spiral spoiler is composed of an upper plate and a lower plate, the upper plate is connected to the upper column, and the lower plate is connected to the lower column.

[0015] Furthermore, in the above-mentioned corrosion-resistant auxiliary device for antifreeze of the oil tank breathing valve system, the heat exchange component also includes a fixed plate and a bracket, the two ends of the fixed plate are connected to the shell, and the middle part of the fixed plate is connected to the horizontal spoiler located above the connecting column; the two ends of the bracket are connected to the shell, and the middle part of the bracket is connected to the horizontal spoiler located below the connecting column; the inner surface of the shell and the surface of the heat exchange component are both plated with an electroplating layer, the electroplating layer is a nickel-based alloy, and the thickness of the electroplating layer is 30μm to 50μm.

[0016] It can be seen from the analysis that the utility model discloses a corrosion-resistant auxiliary device for antifreeze of the breathing valve system of an oil storage tank. The device effectively utilizes the cold air from the outside through the built-in heat exchange component. The cold air from the outside reduces the temperature of the gas inside the oil storage tank and reduces the water vapor therein, thereby avoiding the condensation and freezing of water vapor at the fire barrier net and the breathing valve, improving the corrosion and antifreeze performance of the breathing valve system of the oil storage tank, and ensuring the normal operation of the oil storage tank in the low temperature environment in winter. The horizontal spoiler and the spiral spoiler increase the heat exchange area between the gas and the heat exchange tube by guiding the flow direction of the airflow, reduce the dead angle in the gas flow, maintain a more uniform flow rate, and thus improve the heat exchange efficiency. The inner surface of the shell and the surface of the heat exchange component are treated with a nickel-based alloy plating to improve their corrosion resistance and effectively increase the service life of the device. The air inlet is provided with an unpowered wind hood to achieve cooling of the heat exchange component by relying on natural wind ventilation without the need for external energy input, thereby reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. Among them:

[0018] Figure 1 This is a schematic structural diagram of an embodiment of the utility model assembled with an oil storage tank.

[0019] Figure 2 It is a three-dimensional structural schematic diagram of an embodiment of the utility model.

[0020] Figure 3 It is a schematic cross-sectional structure diagram of an embodiment of the utility model.

[0021] Figure 4 It is a schematic diagram of the internal structure of an embodiment of the utility model.

[0022] Figure 5 The figure is a schematic diagram of the three-dimensional structure of a horizontal spoiler and a spiral spoiler according to an embodiment of the present invention.

[0023] Figure 6 This is a diagram of the heat transfer performance of a structure evaluated by the Nusselt number Nu according to an embodiment of the present invention.

[0024] Figure 7 This is a pressure drop performance diagram of a resistance coefficient f evaluation structure according to an embodiment of the present invention.

[0025] Figure 8 This is a comprehensive performance diagram of the comprehensive performance evaluation coefficient η of an embodiment of the utility model, which takes the plateless structure as the standard evaluation structure.

[0026] Fig. 9 This is a cross-sectional temperature distribution diagram of an embodiment of the present utility model.

[0027] Fig.10 This is a temperature distribution diagram of the air outlet of an embodiment of the present utility model.

[0028] Explanation of the reference numerals: 1 breathing valve; 2 fire-blocking net; 3 oil storage tank; 4 shell; 5 upper cylinder; 6 lower cylinder; 7 air inlet; 8 air outlet; 9 upper ventilation port; 10 lower ventilation port; 11 first air collecting plate; 12 second air collecting plate; 13 heat exchange pipe; 14 ventilation pipe; 15 ventilation straight pipe; 16 ventilation elbow; 17 horizontal spoiler; 18 spiral spoiler; 19 connecting column; 20 through hole; 21 upper column; 22 lower column; 23 upper plate; 24 lower plate; 25 fixing plate; 26 bracket. DETAILED DESCRIPTION

[0029] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present invention and does not limit the present invention. In fact, it will be clear to those skilled in the art that modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as a part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desired that the present invention includes such modifications and variations within the scope of the appended claims and their equivalents.

[0030] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. The terms "connected", "connected" and "set" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components; they can be wired electrical connections, radio connections, or wireless communication signal connections. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0031] One or more examples of the utility model are shown in the attached drawings. The detailed description uses numbers and letters to refer to the features in the drawings. Similar or similar marks in the drawings and descriptions have been used to refer to similar or similar parts of the utility model. As used herein, the terms "first", "second", and "third" etc. are used interchangeably to distinguish one component from another, and are not intended to indicate the position or importance of individual components.

[0032] like Figures 1 to 10 As shown, according to an embodiment of the utility model, a corrosion-resistant auxiliary device for antifreeze of a breathing valve system of an oil storage tank is provided, such as Figure 1As shown, the device includes a shell 4, an air inlet 7, an air outlet 8 and a heat exchange component, wherein an upper air exchange port 9 is provided at the upper end of the shell 4, and the breathing valve system (including the breathing valve 1 and the fire-blocking net 2) is connected to the shell 4 through the upper air exchange port 9, and a lower air exchange port 10 is provided at the lower end of the shell 4, and the oil storage tank 3 is connected to the shell 4 through the lower air exchange port 10; the heat exchange component is arranged inside the shell 4, and the heat exchange component is connected to both the air inlet 7 and the air outlet 8. Cold air from the outside enters the heat exchange component through the air inlet 7 and flows out of the heat exchange component through the air outlet 8. The cold air from the outside flows through the heat exchange component to reduce the temperature of the exhaust gas of the oil storage tank 3, condense the water vapor in the exhaust gas of the oil storage tank 3, reduce the moisture reaching the fire-blocking net 2 and the breathing valve 1 of the breathing valve system, and thus avoid condensation and freezing of water vapor at the fire-blocking net 2 and the breathing valve 1, improve the antifreeze performance of the breathing valve system of the oil storage tank 3, and ensure the normal operation of the oil storage tank 3 in the low temperature environment in winter.

[0033] Furthermore, if Figure 2 and Figure 3 As shown, the heat exchange assembly includes a first air collecting plate 11, a second air collecting plate 12 and a heat exchange tube 13. The first air collecting plate 11 is located above the second air collecting plate 12. The air inlet 7 is connected to the first air collecting plate 11 through a vent pipe 14, and the air outlet 8 is connected to the second air collecting plate 12 through a vent pipe 14. The first air collecting plate 11 and the second air collecting plate 12 are connected through a plurality of heat exchange tubes 13. The cold air from the outside flows into the plurality of heat exchange tubes 13 through the air inlet 7 and the first air collecting plate 11 in turn, and then is collected through the second air collecting plate 12 and discharged from the air outlet 8. Such a configuration increases the heat exchange area between the heat exchange tube 13 and the gas in the shell 4, improves the condensation effect of water vapor in the gas in the shell 4, and ensures the normal operation of the oil storage tank 3 in the low temperature environment in winter.

[0034] Further, the heat exchange assembly is provided with multiple air inlets 7, multiple air outlets 8, and each heat exchange assembly corresponds to one air inlet 7 and one air outlet 8; the heat exchange assembly is provided with one or more first air collecting plates 11, the cross section of the first air collecting plates 11 is fan-shaped, and the cross section of the whole formed by the combination of all the first air collecting plates 11 is circular; the ventilation pipe 14 includes a ventilation straight pipe 15 and a ventilation elbow 16, and the air inlet 7 is connected to one first air collecting plate 11 through a ventilation straight pipe 15 or a ventilation elbow 16. The heat exchange assembly is provided with one or more second air collecting plates 12, the cross section of the second air collecting plates 12 is fan-shaped, and the cross section of the whole formed by the combination of all the second air collecting plates 12 is circular; the number of first air collecting plates 11 and second air collecting plates 12 in one heat exchange assembly is the same; the air outlet 8 is connected to one second air collecting plate 12 through a ventilation straight pipe 15 or a ventilation elbow 16.

[0035] like Figure 3 and Figure 4As shown, in one embodiment of the utility model, two heat exchange assemblies are provided, and the two heat exchange assemblies are symmetrically arranged on the left and right. Each heat exchange assembly is connected to an air inlet 7 and an air outlet 8. The heat exchange assembly is provided with three first air collecting plates 11, wherein one first air collecting plate 11 is connected to the air inlet 7 through a ventilation straight pipe 15, and the other two first air collecting plates 11 are connected to the air inlet 7 through a ventilation elbow 16 respectively. The heat exchange assembly is provided with three second air collecting plates 12, wherein one second air collecting plate 12 is connected to the air outlet 8 through a ventilation straight pipe 15, and the other two second air collecting plates 12 are connected to the air outlet 8 through a ventilation elbow 16 respectively. The two air inlets 7 are symmetrical on the left and right, and the two air outlets 8 are symmetrical on the left and right. The heat exchange assembly adopts a symmetrical structure with the left and right parts completely isolated, which enhances the overall structural stability and heat exchange efficiency of the device.

[0036] In another embodiment of the utility model, four heat exchange components are provided, and the heat exchange components are provided with four air inlets 7 and four air outlets 8. The four air inlets 7 are respectively oriented in the four directions of the front, back, left and right of the shell 4, and the four air outlets 8 are respectively oriented in the four directions of the front, back, left and right of the shell 4. Such an arrangement can ensure that wind from all directions can enter the heat exchange component.

[0037] Furthermore, the opening end of the air inlet 7 faces upward, and a non-powered hood is provided at the upper end of the air inlet 7; the opening end of the air outlet 8 faces downward. Such an arrangement enables cooling of the heat exchange component by relying solely on natural wind ventilation, without the need for external energy input, thereby reducing costs.

[0038] Furthermore, the heat exchange tube 13 is a copper tube, and a plurality of heat exchange tubes 13 are evenly distributed between the first gas collecting plate 11 and the second gas collecting plate 12, and the distance between the axes of two adjacent heat exchange tubes 13 is 30 mm to 40 mm. Such an arrangement can increase the heat exchange area between the heat exchange tube 13 and the gas in the shell 4 without affecting the gas flow in the shell 4, and ensure the condensation effect of the water vapor in the exhaust gas of the oil storage tank 3. In one embodiment of the utility model, the outer diameter of the heat exchange tube 13 is 15 mm and the inner diameter is 11 mm.

[0039] Furthermore, the shell 4 is a cylindrical structure as a whole, and the shell 4 is composed of an upper cylinder 5 and a lower cylinder 6, and the lower end of the upper cylinder 5 is connected to the upper end of the lower cylinder 6. Such an arrangement can facilitate the assembly of the device.

[0040] Furthermore, the upper end of the upper cylinder 5 shrinks toward the central axis of the shell 4 to form an upper ventilation port 9, and the upper end of the upper ventilation port 9 is connected to the breathing valve system through a flange; the lower end of the lower cylinder 6 shrinks toward the central axis of the shell 4 to form a lower ventilation port 10, and the lower end of the lower ventilation port 10 is connected to the outlet pipe of the oil storage tank through a flange.

[0041] Furthermore, if Figure 5 As shown, the heat exchange assembly also includes two horizontal spoilers 17, a spiral spoiler 18 and a connecting column 19; the two horizontal spoilers 17 are respectively arranged at both ends of the connecting column 19, and the connecting column 19 is vertically arranged in the shell 4; one horizontal spoiler 17 is located above the first air collecting plate 11 and close to the upper air exchange port 9, and the other horizontal spoiler 17 is located below the second air collecting plate 12 and close to the lower air exchange port 10; the spiral spoiler 18 is connected to the connecting column 19 and is located between the two horizontal spoilers 17, and the spiral spoiler 18 is arranged in a spiral shape, the lower end of the spiral spoiler 18 is connected to the second air collecting plate 12, and the upper end of the spiral spoiler 18 is connected to the first An air collecting plate 11 is connected, the spiral rise angle of the spiral spoiler 18 is 5°~10°, preferably, the spiral rise angle of the spiral spoiler 18 is 7.95°, such an arrangement can make the heat exchange component have better comprehensive heat exchange performance; the spiral spoiler 18 is provided with a plurality of through holes 20 for the heat exchange tube 13 to pass through; the connecting column 19 is composed of an upper column 21 and a lower column 22, and the lower end of the upper column 21 is connected to the upper end of the lower column 22; the spiral spoiler 18 is composed of an upper plate 23 and a lower plate 24, the upper plate 23 is connected to the upper column 21, and the lower plate 24 is connected to the lower column 22, such an arrangement can facilitate the installation and disassembly of the device. The horizontal spoiler 17 and the spiral spoiler 18 play a guiding role for the gas in the shell 4. The spiral spoiler 18 causes the gas in the shell 4 to rise or fall along the spiral spoiler 18, thereby increasing the heat exchange area between the gas and the heat exchange tube 13, reducing dead angles in the gas flow, maintaining a more uniform flow rate, and thus improving the heat exchange efficiency.

[0042] In one embodiment of the present invention, Fig. 9 As shown, when the hot fluid in the oil storage tank 3 flows to the second spiral circle of the spiral spoiler 18 from bottom to top, the temperature of most of the hot fluid has dropped to below 0°C, and the temperature in the local area even reaches about -10°C. In this process, the water vapor in the gas generated by the oil storage tank 3 will liquefy and flow back into the oil storage tank along the spiral structure of the spiral spoiler 18. Since the toxic substances in the oil storage tank 3 will cause environmental pollution when discharged into the atmosphere through the breathing valve 1, the above-mentioned design of the utility model not only effectively avoids the toxic substances from being discharged into the atmosphere through the breathing valve 1, but also prevents the freezing and blocking caused by excessive water vapor when the hot fluid flows to the flame arrester and the breathing valve 1. By finely controlling the temperature distribution and fluid flow direction, the device effectively improves the safety and environmental protection performance of the oil storage tank.

[0043] like Fig.10 As shown in the figure, when analyzing the temperature distribution at the outlet of the device, it is observed that the temperature at the outlet drops below 0°C, and the temperature at the upper edge area is relatively high. Because the upper edge is close to the outlet of the spiral spoiler, the fluid flow rate here is faster, resulting in a slower temperature drop.

[0044] Furthermore, the heat exchange assembly also includes a fixing plate 25 and a bracket 26, the two ends of the fixing plate 25 are connected to the shell 4, the middle part of the fixing plate 25 is connected to the horizontal spoiler 17 located above the connecting column 19, and the fixing plate 25 is used to fix the horizontal spoiler 17 located above the connecting column 19; the two ends of the bracket 26 are connected to the shell 4, the middle part of the bracket 26 is connected to the horizontal spoiler 17 located below the connecting column 19, and the bracket 26 is used to provide fixed support for the horizontal spoiler 17 and the spiral spoiler 18 to improve the stability of the heat exchange assembly; the inner surface of the shell 4 and the surface of the heat exchange assembly are both plated with an electroplating layer, the electroplating layer is a nickel-based alloy, and the thickness of the electroplating layer is 30μm to 50μm. Since the gases generated by chemical products such as petroleum or natural gas in the oil storage tank 3 are corrosive, the shell 4, the first gas collecting plate 11, the second gas collecting plate 12, the heat exchange tube 13, the horizontal spoiler 17 and the spiral spoiler 18 are surface-plated with nickel-based alloy to enhance the corrosion resistance of the device and effectively improve the service life of the device.

[0045] The device is suitable for large liquid storage facilities operating in cold environments, such as storage tanks for petroleum, chemical products and other flammable liquids. These tanks require an effective breathing system to control the pressure difference between the inside and outside of the tank, while preventing external fire sources from igniting flammable gases in the tank through the breathing system.

[0046] Example 1

[0047] In this embodiment, the device has a spiral plate structure, and is provided with two bilaterally symmetrical heat exchange components. The outer diameter of the heat exchange tube 13 is 15 mm, the inner diameter is 11 mm, the distance between the axes of two adjacent heat exchange tubes 13 is 30 mm, and the heat exchange component is provided with a spiral spoiler 18, and the spiral angle of the spiral spoiler 18 is 7.95°. After the oil storage tank 3 is installed with the device, the relationship between the Reynolds number and the air flow velocity of the air inlet 7 is shown in Table 1. The numerical simulation results show that after the hot fluid flows through the device, the temperature at the outlet of the air outlet 8 will drop below 0°C, the specific average outlet temperature is -6.159°C, and the average outlet gas velocity is 17.096m / s.

[0048] Table 1 Relationship between Reynolds number and air velocity at air inlet 7

[0049]

[0050] As shown in Table 1, the Reynolds number is proportional to the flow velocity. The greater the flow velocity, the greater the Reynolds number. The spiral spoiler with a spiral rise angle of 7.95° has better comprehensive performance under high Reynolds numbers of the fluid (the fluid exhibits laminar flow at low Reynolds numbers and turbulent flow at high Reynolds numbers).

[0051] Comparative Example 1

[0052] In this comparative example, the device has a structure without a spiral plate. Except that the heat exchange component is not provided with a spiral spoiler 18, other structures are consistent with those of Example 1.

[0053] Comparing Example 1 with Comparative Example 1, the Nusselt number Nu was used to evaluate the heat transfer performance of the structure. Figure 6 As shown, the resistance coefficient f evaluates the pressure drop performance of the structure as Figure 7 The comprehensive performance evaluation coefficient η is based on the plateless structure (no spiral plate structure) to evaluate the comprehensive performance of the structure. Figure 8 The temperature distribution of the device cross section is shown in 9, and the temperature distribution of the air outlet 8 is shown in Fig.10 shown.

[0054] From Table 1, Figure 6-Figure 10 It can be seen that the spiral plate structure performs better in heat transfer effect, but is accompanied by greater resistance; the heat transfer performance of the spiral plate structure shows a trend of first decreasing and then increasing with the increase of Reynolds number. Under high flow rate medium conditions, the spiral plate structure shows better comprehensive performance.

[0055] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0056] An anti-corrosion auxiliary device for antifreeze of an oil storage tank breathing valve system. The device effectively utilizes cold air from the outside through a built-in heat exchange component. The outside cold air reduces the temperature of the gas inside the oil storage tank 3 and reduces the water vapor therein, thereby preventing the condensation and freezing of water vapor at the fire-blocking net 2 and the breathing valve 1, thereby improving the corrosion and anti-freeze performance of the breathing valve system of the oil storage tank 3 and ensuring the normal operation of the oil storage tank 3 in a low temperature environment in winter.

[0057] The horizontal spoiler 17 and the spiral spoiler 18 increase the heat exchange area between the gas and the heat exchange tube 13 by guiding the flow direction of the airflow, reduce the dead angle in the gas flow, maintain a more uniform flow rate, and thus improve the heat exchange efficiency. The inner surface of the shell 4 and the surface of the heat exchange component are plated with a nickel-based alloy to improve their corrosion resistance and effectively increase the service life of the device.

[0058] The air inlet 7 is provided with an unpowered hood to achieve cooling of the heat exchange component by natural wind ventilation without the need for external energy input, thereby reducing costs.

[0059] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A corrosion-resistant auxiliary device for antifreeze of a breathing valve system of an oil storage tank, characterized in that: The device comprises a housing, an air inlet, an air outlet and a heat exchange component, wherein: The upper end of the shell is provided with an upper ventilation port, and the breathing valve system is communicated with the shell through the upper ventilation port; the lower end of the shell is provided with a lower ventilation port, and the oil storage tank is communicated with the shell through the lower ventilation port; The heat exchange component is arranged inside the shell, and the heat exchange component is communicated with both the air inlet and the air outlet.

2. The anti-freezing corrosion auxiliary device for the oil tank breathing valve system according to claim 1 is characterized in that: The heat exchange assembly includes a first air collecting plate, a second air collecting plate and a heat exchange tube. The first air collecting plate is located above the second air collecting plate. The air inlet is connected to the first air collecting plate through a ventilation tube. The air outlet is connected to the second air collecting plate through a ventilation tube. The first air collecting plate and the second air collecting plate are connected through a plurality of heat exchange tubes.

3. The anti-freezing corrosion auxiliary device for the oil tank breathing valve system according to claim 2 is characterized in that: There are multiple heat exchange components, multiple air inlets, and multiple air outlets, and each heat exchange component corresponds to one air inlet and one air outlet; The heat exchange assembly is provided with one or more first gas collecting plates, the cross section of the first gas collecting plates is fan-shaped, and the cross section of the whole formed by the combination of all the first gas collecting plates is circular. The ventilation pipe comprises a ventilation straight pipe and a ventilation elbow, and the air inlet is connected to one of the first air collecting plates through one of the ventilation straight pipes or one of the ventilation elbows.

4. The anti-freezing corrosion auxiliary device for the oil tank breathing valve system according to claim 3 is characterized in that: The heat exchange assembly is provided with one or more second gas collecting plates, the cross section of the second gas collecting plates is fan-shaped, and the cross section of the whole formed by the combination of all the second gas collecting plates is circular; The number of the first gas collecting plates and the number of the second gas collecting plates in one heat exchange assembly are the same; The air outlet is communicated with the second air collecting plate through a straight ventilation pipe or a curved ventilation pipe.

5. The anti-freezing corrosion auxiliary device for the oil tank breathing valve system according to claim 1 is characterized in that: The opening end of the air inlet faces upward, and a non-powered hood is provided at the upper end of the air inlet; The opening end of the air outlet faces downward.

6. The anti-freezing corrosion auxiliary device for the oil tank breathing valve system according to claim 2 is characterized in that: The heat exchange tubes are copper tubes, and a plurality of the heat exchange tubes are evenly distributed between the first gas collecting plate and the second gas collecting plate, and the distance between the axes of two adjacent heat exchange tubes is 30 mm to 40 mm.

7. The anti-freezing corrosion auxiliary device for the oil tank breathing valve system according to claim 1 is characterized in that: The shell is composed of an upper cylinder and a lower cylinder, and the lower end of the upper cylinder is connected to the upper end of the lower cylinder.

8. The anti-freezing corrosion auxiliary device for the oil tank breathing valve system according to claim 7 is characterized in that: The upper end of the upper cylinder shrinks toward the central axis of the shell to form the upper ventilation port, and the upper end of the upper ventilation port is connected to the breathing valve system through a flange; The lower end of the lower cylinder shrinks toward the central axis of the shell to form the lower ventilation port, and the lower end of the lower ventilation port is connected to the air outlet pipe of the oil storage tank through a flange.

9. The anti-freezing corrosion auxiliary device for the oil tank breathing valve system according to claim 2 is characterized in that: The heat exchange assembly also includes two horizontal spoilers, a spiral spoiler and a connecting column; The two horizontal spoilers are respectively arranged at two ends of a connecting column, and the connecting column is vertically arranged in the shell; One horizontal spoiler is located above the first air collecting plate and close to the upper air exchange port, and another horizontal spoiler is located below the second air collecting plate and close to the lower air exchange port; The spiral spoiler is connected to the connecting column and is located between the two horizontal spoilers. The spiral spoiler is arranged in a spiral shape. The lower end of the spiral spoiler is connected to the second air collecting plate, and the upper end of the spiral spoiler is connected to the first air collecting plate. The spiral rise angle of the spiral spoiler is 5° to 10°. The spiral spoiler is provided with a plurality of through holes for the heat exchange tubes to pass through; The connecting column is composed of an upper column and a lower column, and the lower end of the upper column is connected to the upper end of the lower column; The spiral spoiler is composed of an upper plate and a lower plate, wherein the upper plate is connected to the upper column, and the lower plate is connected to the lower column.

10. The anti-freezing corrosion auxiliary device for the oil tank breathing valve system according to claim 9 is characterized in that: The heat exchange assembly further includes a fixing plate and a bracket, wherein both ends of the fixing plate are connected to the shell, and the middle portion of the fixing plate is connected to the horizontal spoiler located above the connecting column; Both ends of the bracket are connected to the shell, and the middle part of the bracket is connected to the horizontal spoiler located below the connecting column; The inner surface of the shell and the surface of the heat exchange component are both plated with an electroplating layer, the electroplating layer is a nickel-based alloy, and the thickness of the electroplating layer is 30 μm to 50 μm.

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