Low-temperature solidified substance storage tank

Abstract

The utility model discloses a low-temperature solidified substance storage tank which comprises a tank body, a storage cavity is formed in the tank body, a heater is arranged in the storage cavity, one end of the heater is an air inlet, the other end of the heater is an air outlet, and the air inlet is communicated with the air outlet. The air inlet and the air outlet both extend to the outside of the tank body, and the air inlet is communicated with a steam heat source; wherein the air inlet is higher than the air outlet. Two heaters are arranged in the storage cavity to heat the low-temperature solidified substance so as to ensure the flowability of the low-temperature solidified substance, for example, when the soybean phospholipid is stored, a steam heat source is introduced into the heaters, so that the stainless steel pipe is heated, and the outside of the stainless steel pipe is in contact with the soybean phospholipid, so that the soybean phospholipid is heated; heating of the soybean phospholipid is completed. When the soybean phospholipid is heated, the fluidity of the soybean phospholipid is gradually enhanced. In addition, the heater is obliquely arranged, so that condensate water in the heater can be discharged conveniently.

Description

Technical Field

[0001] The utility model belongs to the technical field of storage tanks, and particularly relates to a storage tank for cryogenic solidifying substances. Background Art

[0002] Cryogenic solidifying substances are usually in a solidified state or a viscous state at normal temperature. For example, liquid soybean phospholipid is a brown plastic or viscous liquid. At normal temperature, liquid soybean phospholipid has a uniform texture and poor fluidity, and is in a solid state at lower temperatures. Therefore, cryogenic solidifying substances at low temperature or normal temperature cannot be used for normal industrial production. Summary of the Utility Model

[0003] In order to solve the problem of poor fluidity of cryogenic solidifying substances during storage, the utility model discloses a storage tank for cryogenic solidifying substances, which comprises: a tank body with a storage cavity formed inside, a heater is arranged in the storage cavity, one end of the heater is an air inlet and the other end is an air outlet, and the air inlet is communicated with the air outlet; both the air inlet and the air outlet extend to the outside of the tank body, and the air inlet is communicated with a steam heat source; wherein, the air inlet is higher than the air outlet.

[0004] In some exemplary technical solutions, the heater is a bent pipe, the bent pipe is bent in a first plane, and each bent section of the bent pipe is in the first plane; the first plane is an inclined section in the storage cavity; the air inlet is located at a high position of the inclined section, and the air outlet is located at a low position of the inclined section.

[0005] In some exemplary technical solutions, the bent pipe is a multi-U-shaped pipe extending continuously in an S shape; each U-shaped pipe of the multi-U-shaped pipe is arranged in sequence along the direction from the air inlet to the air outlet, the straight sides of each U-shaped pipe are adjacent, and the edges of the arc bends of each U-shaped pipe are close to the inner side wall of the storage cavity; each U-shaped pipe in the multi-U-shaped pipe is in the first plane.

[0006] In some exemplary technical solutions, the air outlet is used for discharging steam and condensate.

[0007] In some examples, the openings of the air inlet and / or the air outlet are in a flared shape.

[0008] In some examples, the heater comprises a first heater and a second heater; the first heater and the second heater are arranged at intervals in a first direction in the storage cavity, the first heater is arranged above the second heater; both the first heater and the second heater are externally connected with the steam heat source, and at least one of the first heater and the second heater is introduced with the steam heat source.

[0009] In some examples, the tank body is further provided with a first temperature sensor and a second temperature sensor. The first temperature sensor at least partially extends into the storage cavity, and the second temperature sensor at least partially extends into the storage cavity. Among them, the first temperature sensor is arranged beside the first heater; the second temperature sensor is arranged beside the second heater.

[0010] In some examples, the storage cavity includes: an upper storage area, which includes the upper and lower areas of the first heater in the first direction. The first heater is used to heat the upper storage area, and the first temperature sensor is arranged in the upper storage area; a lower storage area, which includes the upper and lower areas of the second heater in the first direction. The second heater is used to heat the lower storage area, and the second temperature sensor is arranged in the lower storage area.

[0011] In some examples, the tank body is wrapped with a heat insulation layer, and a feed port and a discharge port communicating with the storage cavity are opened on the wall surface of the tank body.

[0012] In some examples, the lower end of the tank body is closed, and the upper end is provided with a conical top cover; the conical top cover is provided with a liquid level sensor, and the liquid level sensor at least partially extends into the storage cavity.

[0013] The effect is as follows:

[0014] Two heaters are arranged inside the storage cavity to heat the low-temperature solidifying substances to ensure the fluidity of the low-temperature solidifying substances. For example, when storing soybean phospholipid, the heater is a continuous U-shaped tube made of coiled stainless steel pipes welded together, and a support is installed below it. Steam heat source is introduced into the heater, so that the stainless steel pipes are heated up, and the outside of the stainless steel pipes contacts with the soybean phospholipid, thereby heating the soybean phospholipid. The soybean phospholipid is heated and its fluidity gradually increases. When it reaches 55°C, its fluidity can be used for industrial production. And, steam heat source is introduced into the heater, and the heater is arranged obliquely. By arranging the heater obliquely, it is beneficial to discharge the condensed water in the heater.

[0015] Other features and advantages of the present utility model will be described in the subsequent description, and, in part, will become apparent from the description, or will be understood by implementing the present utility model. The objectives and other advantages of the present utility model can be achieved and obtained through the structures pointed out in the description, claims and drawings. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 Shows a schematic structural diagram of a soybean phospholipid storage tank according to an embodiment of the present invention;

[0018] Figure 2 Shows a cross-sectional view of a soybean phospholipid storage tank according to an embodiment of the present invention;

[0019] Figure 3 Shows a cross-sectional view of a soybean phospholipid storage tank from another angle according to an embodiment of the present invention;

[0020] Figure 4 Shows a cross-sectional view of a soybean phospholipid storage tank from another angle according to an embodiment of the present invention.

[0021] In the drawings:

[0022] 100 - Tank body, 110 - Thermal insulation layer, 120 - Conical top cover, 130 - Storage tank base;

[0023] 200 - Storage cavity, 210 - Feed inlet, 212 - First bent pipe, 213 - Second bent pipe, 220 - Discharge outlet, 230 - Drain pipe, 240 - Flange manhole, 250 - Upper storage area, 260 - Lower storage area;

[0024] 330 - First heater, 331 - First air inlet, 332 - First air outlet, 333 - U-shaped pipe, 340 - Second heater, 341 - Second air inlet, 342 - Second air outlet;

[0025] 400 - Heater mounting frame, 410 - Lower bracket, 420 - Upper bracket, 430 - Vertical bracket;

[0026] 500 - Man ladder, 510 - Guardrail, 520 - Observation window, 530 - Liquid level sensor, 540 - Breather valve, 550 - Pressure sensor;

[0027] 610 - First temperature sensor, 620 - Second temperature sensor. Detailed implementation manners

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0029] During the storage process of cryogenic solidifying substances, due to their own properties, they will approach solidification or solidify at room temperature, resulting in poor fluidity. For example, lipid compounds, specifically phospholipids. To avoid the inability to use cryogenic solidifying substances after solidification, this embodiment discloses a storage tank for low-solidifying substances. For understanding in combination with Figures 1-4 it includes: a tank body 100 with a storage cavity 200 formed inside. A heater is provided in the storage cavity 200. One end of the heater is an air inlet, and the other end is an air outlet, and the air inlet is communicated with the air outlet; both the air inlet and the air outlet extend to the outside of the tank body 100, and the air inlet is communicated with a steam heat source; wherein, the air inlet is higher than the air outlet, and the steam and condensate are discharged from the air outlet.

[0030] Specifically, the heater is a steam heating pipe, and the steam heating pipe is suspended in the storage cavity 200. The specific structure of the heater can be described with reference to subsequent specific examples. It should be understood that the steam heating pipe can also be replaced by other devices for passing steam; in addition, the heat source can also be replaced by other substances with heat exchange performance. Such replacements are direct replacements by conventional means and do not require creative efforts from those skilled in the art. For example, steam can be replaced by high-temperature liquid, etc. It can be understood that using the heater in this embodiment to heat the cryogenic solidifying substance can ensure the fluidity of the cryogenic solidifying substance after being heated by the heater.

[0031] In some examples, the heater is a bent pipe, and the bent pipe is bent in a first plane, and each bent section of the bent pipe is in the first plane; for better illustration, the first plane can be combined with the examples of the first aspect in the subsequent part and in combination with Figure 4Understood, but the specific structure of the following-described first aspect example does not limit the present utility model. The first plane is an inclined section within the storage cavity 200. It is not difficult to understand that the steam heat source is introduced into the heater, the air inlet in the bent pipe is located at the high position of the inclined section, and the air outlet is located at the low position of the inclined section; thus, the condensate formed by cooling in the bent pipe will flow along the inclination direction of the inclined section. Specifically, since the bent pipe is in the first plane, the condensate will not accumulate in the bent pipe during the flowing process. The condensate will be discharged from the exhaust port, that is, the air outlet will discharge steam and condensate.

[0032] For better understanding, refer to the following Figures 1-4 to understand the first aspect example of this embodiment.

[0033] This example will be described in detail taking soybean phospholipid as an example. Soybean phospholipid is a kind of mixed phospholipid, which is composed of phosphatidylcholine (lecithin, abbreviated as PC, high grade is PPC), phosphatidylethanolamine (cephalin, abbreviated as PE), phosphatidylinositol (inositol phospholipid, abbreviated as PI), phosphatidylserine (serine phospholipid, abbreviated as PS), etc. The most typical ones are the first three. At normal temperature, liquid soybean phospholipid is in the form of brown plastic or viscous liquid, with uniform texture and poor fluidity. Even at lower temperatures, it is in a solid state and cannot be used for normal industrial production. The fluidity of soybean phospholipid is closely related to temperature. When the temperature rises, its fluidity increases. When it reaches 55 °C and above, the fluidity is good and normal industrial production can be carried out.

[0034] As Figure 1 shown, the low-temperature solidification product storage tank in this example is a soybean phospholipid storage tank. The tank body 100 includes a cylindrical heat insulation layer 110. The heat insulation layer 110 wraps the entire tank body 100 for heat insulation of the storage tank. The lower end of the tank body 100 is closed, and the upper end is provided with a conical top cover 120. A storage tank base 130 is also provided below the storage tank. The storage tank base 130 is installed on the ground, and the conical top cover 120 seals the upper end of the storage tank. The conical top cover 120 is connected to the heat insulation layer 110 to form the storage cavity 200. The storage cavity 200 is used for storing soybean phospholipid. In this example, refer to Figure 2 the shown structure of the storage cavity 200 for understanding.

[0035] The heater in this example includes a first heater 330 and a second heater 340. The first heater 330 is arranged above the second heater 340. Therefore, the first heater 330 and the second heater 340 are spaced apart in the first direction within the storage chamber 200. In this example, the first direction is the vertical direction, that is, the axis direction of the storage tank, and it can be different in different examples. When using the heater for heating, the first heater 330 and the second heater 340 can heat the soybean phospholipid in different regions to improve efficiency. It can be conceived without creative work that a third heater or even a fourth heater, etc., can also be arranged in the storage chamber 200 and spaced apart.

[0036] Both the first heater 330 and the second heater 340 are steam heater pipes. Specifically, in combination with Figure 3 the internal structure shown, the first heater 330 will be specifically described as an example.

[0037] In the example, the storage chamber 200 is used to store the soybean phospholipid. The first heater 330 and the second heater 340 heat the soybean phospholipid to 55°C - 70°C to ensure that the soybean phospholipid can maintain fluidity. Specifically, its own temperature can exceed 55°C - 70°C.

[0038] In the specific situation of this example, continue to refer to Figure 3 for understanding. The first heater 330 is: a multi-U-shaped tube 333 extending continuously in an S shape, which can specifically be a stainless steel metal tube. The first heater 330 is bent in the first plane, and the edges of the arc bends of each U-shaped tube are all close to the inner side wall of the storage chamber 200. Continue to refer to Figures 3-4 It can be seen that the U-shaped tubes of the multi-U-shaped tube are arranged in sequence from the air inlet to the air outlet direction. The straight sides of each U-shaped tube are adjacent, and the edges of the arc bends of each U-shaped tube are all close to the inner side wall of the storage chamber 200. Each of the U-shaped tubes in the multi-U-shaped tube is in the first plane.

[0039] It can be understood that a coiled tube body of the heater can fully provide a heating effect. Specifically, the multi-U-shaped tube 333 extending continuously in an S shape in this example is in full contact with the soybean phospholipid to be heated to improve the temperature transfer effect. The first heater 330 covers the inclined section of the storage chamber 200 where it is located, which is beneficial to ensuring full heating of the soybean phospholipid in the storage chamber 200.

[0040] In this example, the position of the first air inlet 331 is higher than that of the first air outlet 332, and the first heater 330 is inclined. Continue to combine with Figure 2In the shown structure, both ends of the first heater 330 extend to the outside of the tank body 100. The two ends of the first heater 330 are respectively a first air inlet 331 and a first air outlet 332. The first air inlet 331 is at a high position, and the first air outlet 332 is at a low position; the first air inlet 331 and / or the first air outlet 332 are in a flared shape.

[0041] Similarly, the second heater 340 extends out a second air inlet 341 and a second air outlet 342. The structure of the second heater 340 is basically the same as that of the first heater 330, and will not be elaborated here.

[0042] In this example, further referring to Figure 4 as shown, the inclined sections where the first heater 330 and the second heater 340 are located are parallel to each other.

[0043] Continuing to refer to Figure 4 for understanding, a heater mounting bracket 400 is further provided in the storage cavity 200. The heater mounting bracket 400 includes a lower bracket 410, an upper bracket 420, and a vertical bracket 430 with two ends respectively connecting the upper bracket 420 and the lower bracket 410. For better illustration, in combination with Figure 3 specifically described as follows.

[0044] Both ends of the upper bracket 420 are fixed on the inner side wall of the tank body 100. In some examples, the upper bracket 420 is inclined to fix the first heater 330. In Figure 3 the shown case, the upper bracket 420 is horizontally arranged. Specifically, Figure 3 in the shown example, there are three heater mounting brackets 400 arranged in parallel. At least part of the first heater 330 is placed on the upper bracket 420, at least part of the second heater 340 is placed on the lower bracket 410, and the vertical bracket 430 is a rectangular frame. In different examples, the first heater 330 and the second heater 340 can also be separated from the heater mounting bracket 400. When the water vapor condenses into water, the condensed water can flow out along the inclined direction of the first plane, that is, the first air outlet 332 is also used to release the condensed liquid in the pipeline of the first heater 330.

[0045] During operation, the liquid soybean phospholipid is conveyed from the feed port 210 into the storage chamber 200. When the liquid level reaches the upper limit height, the liquid feeding stops, and the filling of soybean phospholipid is completed. After the filling is completed, the temperature of the soybean phospholipid gradually decreases with the ambient temperature until it reaches room temperature. At this time, the soybean phospholipid is a brown viscous liquid with slightly fluidity. When the factory needs to use soybean phospholipid, high-temperature steam is introduced into the first inlet 331 of the first heater 330 and discharged from the first outlet 332. Similarly, high-temperature steam is also introduced into the second heater 340. Since both the first heater 330 and the second heater 340 are inclined, it is convenient for the water condensed from the water vapor to drain. High-temperature steam is introduced into the first heater 330 and the second heater 340 to keep the temperature of the soybean phospholipid between 55°C and 70°C.

[0046] In some examples, continuing to refer to Figure 1 the structure shown, an access ladder 500 is also provided outside the tank body 100. The access ladder 500 is located outside the tank body 100 and is used for construction and maintenance personnel to perform operations on the conical top of the storage tank. Specifically, the access ladder 500 is arranged along the outside of the tank body 100 and extends to the conical top cover 120. A guardrail 510 connected to the access ladder 500 as an integral structure is provided on the conical top cover 120. The guardrail 510 is a circular guardrail 510, and an observation window 520 for observing the internal situation of the storage chamber 200 is provided at the center of the guardrail 510. During use, during the storage process of the soybean phospholipid storage tank, it is necessary to go to the guardrail 510 at regular intervals to observe the storage situation of the storage tank through the observation window 520.

[0047] Based on the foregoing embodiments, further referring to Figure 3 to understand the second aspect example of this embodiment.

[0048] In this example, a plurality of through holes (not shown in the figure due to the occlusion of the temperature sensors and without affecting understanding) are also provided on the tank body 100. A temperature sensor is disposed through each through hole, and the temperature sensors are arranged along a first direction. Specifically, it includes a first temperature sensor 610 and a second temperature sensor 620 arranged in sequence. In this example, the first direction is the axial direction of the storage chamber 200, and it can be a different direction in different examples.

[0049] It can be understood in combination with Figure 1 and Figure 4 that the first temperature sensor 610 is disposed above the first heater 330, and the second temperature sensor 620 is disposed above the second heater 340. For better illustration, the area around the first heater 330 is defined as the upper storage area 250, and the area around the second heater 340 is defined as the lower storage area 260.

[0050] As can be seen from the foregoing content, the first heater 330 is used to heat the upper storage area 250, and the second heater 340 is used to heat the lower storage area 260; correspondingly, the first temperature sensor 610 is used to detect the temperature of the soy lecithin in the upper storage area 250, and the second temperature sensor 620 is used to detect the temperature of the soy lecithin in the lower storage area 260. Therefore, the user can obtain the temperature conditions in different areas of the storage cavity 200 according to the two temperature sensors, so as to judge whether the soy lecithin in the storage cavity 200 reaches the target temperature. And according to different situations, the first heater 330 and the second heater 340 can be separately connected to the steam heat source. Therefore, one of the pipelines corresponding to the first heater 330 and the second heater 340 can be opened alone to introduce high-temperature steam, or both pipelines can be opened simultaneously to introduce high-temperature steam. The arrangement of the two heaters in this example fully ensures the heating of the soy lecithin in the entire storage tank and improves the heating efficiency.

[0051] For example, the first heater 330 and the second heater 340 are separately connected to the steam heat source, and the user introduces the steam heat source into at least one of the first heater 330 and the second heater 340 according to the situation.

[0052] For another example, the first heater 330 and the second heater 340 are respectively connected with a check valve or share a check valve, and the user controls the check valve to introduce the steam heat source into at least one of the first heater 330 and the second heater 340 according to the situation.

[0053] Moreover, those skilled in the art can associate with the third temperature sensor based on the first temperature sensor 610 and the second temperature sensor 620, and similar solutions all fall within the protection scope of the present invention.

[0054] In some examples, continuing to refer to Figure 1 , a liquid level sensor 530 is further provided on the conical top cover 120, and the liquid level sensor 530 is used to determine the storage height of the soy lecithin in the storage cavity 200.

[0055] Based on the content disclosed in the foregoing examples, in some examples, a control system can also be used to control the working state of the soy lecithin storage tank.

[0056] For example, after the storage tank is processed, manufactured and installed, the soy lecithin liquid is input into the storage tank from the feed port 210, and the liquid level sensor 530 is used to detect the liquid level height in the storage cavity 200. When the storage upper limit height is reached, the liquid inlet is stopped, and the filling of the soy lecithin is completed.

[0057] For another example, when the factory needs to use soybean phospholipids, the temperature of the soybean phospholipids in the storage tank is determined by the first temperature sensor 610 and the second temperature sensor 620, and then the fluidity of the soybean phospholipids can be known.

[0058] Specifically, when first used, the soybean phospholipids are at room temperature. At this time, high-temperature steam needs to enter from the high position and exit from the low position of the first heater 330 respectively; and enter from the high position and exit from the low position of the second heater 340 respectively. As described above, the whole heater is arranged obliquely to facilitate the discharge of water when the water vapor condenses into water.

[0059] During operation, the first temperature detector and the second temperature detector detect the temperature of the soybean phospholipids simultaneously. When the detected temperature reaches 70 °C, the supply of high-temperature steam to the first heater 330 and / or the second heater 340 is turned off; when the detected temperature is lower than 55 °C, the first heater 330 and / or the second heater 340 is turned on again, and so on to ensure the supply of soybean phospholipids.

[0060] For another example, when the soybean phospholipids in the storage tank have been used for a certain period of time, when the liquid level sensor 530 determines that the internal storage amount in the storage cavity 200 reaches the lower limit and needs to be refilled, a prompt is given or the refilling process is automatically repeated.

[0061] Based on any of the foregoing examples, continue to combine Figures 1-4 to understand the embodiments of the third aspect.

[0062] In one example, the feed inlet 210 is provided on the side wall surface of the tank body 100. Specifically, a first flange is provided at the opening of the feed inlet 210, and the first flange is used to connect to an external pipeline. The feed inlet 210 extends into the storage cavity 200 with a first bent pipe 212 and a second bent pipe 213. In Figure 4 the structure shown, the first bent pipe 212 extends horizontally, and the first bent pipe 212 further extends downward in the vertical direction with a second bent pipe 213. A number of sub-through holes for discharging materials are provided on the wall surfaces of the first bent pipe 212 and the second bent pipe 213, and the soybean phospholipids are released into the storage cavity 200 through the number of sub-through holes.

[0063] In one example, the discharge port 220 is a pipe extending from the tank body 100. A second flange is provided at the opening of the discharge port 220. In some examples, a first cover is detachably fixed outside the second flange, and the first cover is used to close the discharge port 220.

[0064] In one example, a drain pipe 230 is further provided at the bottom of the storage tank. A second cover body is provided at the opening of the drain pipe 230. The second cover body is used to seal the drain pipe 230. The drain opening is arranged at the bottommost position of the storage tank for discharging the dirt inside the storage tank.

[0065] In one example, a flange manhole 240 is further provided on the tank body 100. The flange manhole 240 is provided with a third cover body. The flange manhole 240 is located at the bottom outside the tank body 100, facilitating construction and maintenance personnel to enter the storage tank for operation.

[0066] In one example, a breather valve 540 is further provided on the conical top cover 120. It can be understood that during the process of supplying soy lecithin, due to the decrease in liquid level, negative pressure will be generated inside the storage tank. At this time, the breather valve 540 can be communicated with the atmosphere to balance the pressure inside the storage tank, so that the storage tank always maintains an atmospheric pressure state.

[0067] In one example, the storage tank is an atmospheric storage tank, and a pressure sensor 550 is provided to monitor the pressure condition of the storage tank in real time.

[0068] Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A low-temperature solidifying substance storage tank, characterized in that, Comprising: A tank body (100) with a storage cavity (200) formed inside. A heater is provided in the storage cavity (200). One end of the heater is an air inlet, and the other end is an air outlet. The air inlet is communicated with the air outlet. Both the air inlet and the air outlet extend to the outside of the tank body (100), and the air inlet is communicated with a steam heat source. Wherein, the air inlet is higher than the air outlet.

2. The cryogenic solidifying substance storage tank according to claim 1, characterized in that: The heater is a bent pipe, and the bent pipe is bent in a first plane, and each bent section of the bent pipe is in the first plane. The first plane is an inclined section in the storage cavity (200). The air inlet is located at the high position of the inclined section, and the air outlet is located at the low position of the inclined section.

3. The low-temperature solidifying substance storage tank according to claim 2, characterized in that: The bent pipe is a multi-U-shaped pipe extending continuously in an S shape. Each U-shaped pipe (333) of the multi-U-shaped pipe is arranged in sequence along the direction from the air inlet to the air outlet. The straight sides of each U-shaped pipe (333) are adjacent, and the edges of the arc bends of each U-shaped pipe (333) are close to the inner side wall of the storage cavity (200). Each of the U-shaped pipes (333) in the multi-U-shaped pipe is in the first plane.

4. The cryogenic solidifying substance storage tank according to claim 2 or 3, characterized in that: The air outlet is used for discharging steam and condensate.

5. The cryogenic solidifying substance storage tank according to claim 1 or 2, characterized in that: The opening of the air inlet and / or the air outlet is in a flared shape.

6. The cryogenic solidifying substance storage tank according to claim 1 or 2, characterized in that: The heater includes a first heater (330) and a second heater (340). The first heater (330) and the second heater (340) are arranged at intervals in a first direction in the storage cavity (200), and the first heater (330) is arranged above the second heater (340). Both the first heater (330) and the second heater (340) are externally connected to the steam heat source, and at least one of the first heater (330) and the second heater (340) is introduced with the steam heat source.

7. The cryogenic solidifying substance storage tank according to claim 6, characterized in that: The tank body (100) is further provided with a first temperature sensor and a second temperature sensor. At least part of the first temperature sensor extends into the storage cavity (200), and at least part of the second temperature sensor extends into the storage cavity (200). Wherein, the first temperature sensor is arranged beside the first heater (330); the second temperature sensor is arranged beside the second heater (340).

8. The cryogenic solidifying substance storage tank according to claim 7, characterized in that: The storage cavity (200) includes: An upper storage area (250), the upper storage area (250) includes the upper area and the lower area of the first heater (330) in the first direction. The first heater (330) is used for heating the upper storage area (250), and the first temperature sensor is arranged in the upper storage area (250). A lower storage area (260), the lower storage area (260) includes the upper area and the lower area of the second heater (340) in the first direction. The second heater (340) is used for heating the lower storage area (260), and the second temperature sensor is arranged in the lower storage area (260).

9. The cryogenic solidifying substance storage tank according to claim 1 or 2, characterized in that: The tank body (100) is wrapped with a heat insulation layer (110), and a feed inlet (210) and a discharge outlet (220) communicating with the storage cavity (200) are formed on the wall surface of the tank body (100).

10. The cryogenic solidifying substance storage tank according to claim 1 or 2, characterized in that: The lower end of the tank body (100) is closed, and a conical top cover (120) is provided at the upper end; The conical top cover (120) is provided with a liquid level sensor (530), and at least part of the liquid level sensor (530) extends into the storage cavity (200).

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