Energy-saving recovery device and method for liquid nitrogen storage tank

Abstract

The invention discloses an energy-saving recovery device and method for a liquid nitrogen storage tank, and relates to the technical field of gas industry, the energy-saving recovery device comprises a tank body, and the tank body is provided with a gas inlet pipe and a gas outlet pipe; the supporting plate is fixedly mounted in the tank body, and a groove is formed in the top of the supporting plate; the cover plate is arranged at the top of the tank body, and the cover plate is fixedly connected with the tank body through screws; the aluminum plate is fixedly installed at the bottom of the cover plate, and the aluminum plate is arranged to be in an arc shape; the heating round pipe is fixedly mounted on the surface of the aluminum plate, and the heating round pipe is used for heating gas; the hollow plate is fixedly mounted at the bottom of the aluminum plate; the nitrogen is uniformly heated through the aluminum plate, and the low-temperature nitrogen is prevented from condensing ice crystals in pores of the filter plate, so that the efficient permeability and the filtering performance of the filter plate are maintained.

Description

Technical Field

[0001] The present invention relates to the technical field of gas industry, and particularly to an energy-saving recovery device and method for a liquid nitrogen storage tank. Background Art

[0002] An energy-saving recovery device for a liquid nitrogen storage tank is a system used to reduce liquid nitrogen evaporation loss and recover cold energy. By optimizing the adiabatic design, recovering the volatilized nitrogen, or utilizing the remaining cold, the operating cost can be reduced and the energy efficiency can be improved.

[0003] The patent with the patent publication number CN221846583U relates to a liquid nitrogen and liquid oxygen gas recovery and reuse device, including a tank body and two storage tanks. One side of the upper end inside the tank body is provided with two chutes, and sliders are slidably connected inside the two chutes. A filter plate is fixedly connected between the two sliders. In the middle of the upper end inside the tank body, a second air inlet pipe is provided. In this patent, when the device is in use, the waste gas entering the inside of the tank body is filtered by the provided filter plate, so that the filter plate can effectively separate and capture impurities in the waste gas, such as solid particles, liquid droplets, and grease, etc., thereby preventing these impurities from entering the inside of the recovery device, protecting the integrity of the device and equipment, and prolonging the service life of the equipment. At the same time, the filter plate can also reduce the influence of these impurities on the condensation and separation processes, and improve the overall efficiency of the recovery device.

[0004] In the above patent, the overall recovery efficiency is improved. By using a filter plate to filter the waste gas entering the inside of the tank body, the filter plate can effectively separate and capture impurities in the waste gas, thereby improving the recovery efficiency. However, when recovering liquid nitrogen, since the temperature of nitrogen gas is relatively low after liquid nitrogen vaporizes into nitrogen gas, when the nitrogen gas passes through the filter plate, ice crystals will form in the pores of the filter plate. As the filtration continues, these ice crystals will accumulate and cause the pores of the filter plate to be blocked. In the long run, the filtration effect of the filter plate will be affected, thereby reducing the overall recovery efficiency, and more frequent maintenance or replacement of the filter plate is required, increasing the maintenance cost of the equipment. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides an energy-saving recovery device and method for a liquid nitrogen storage tank, solving the problems raised in the above background art.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A liquid nitrogen storage tank energy-saving recovery device, comprising: a tank body, an intake pipe and an outlet pipe are arranged on the tank body; a support plate, the support plate is fixedly installed inside the tank body, and a groove is opened at the top of the support plate; a cover plate, the cover plate is arranged on the top of the tank body, and the cover plate is fixedly connected to the tank body by screws; an aluminum plate, the aluminum plate is fixedly installed at the bottom of the cover plate, and the shape of the aluminum plate is set to be arc-shaped; a heating circular tube, the heating circular tube is fixedly installed on the surface of the aluminum plate, the heating circular tube is used to heat the gas, start the heating circular tube, and the heating circular tube increases the temperature inside the tank body through heat conduction and evenly transfers the heat to the aluminum plate; a hollow plate, the hollow plate is fixedly installed at the bottom of the aluminum plate, and an arc-shaped chute is opened on the surface of the hollow plate; a filter plate, the filter plate is arranged on the top of the hollow plate, a stainless steel sintered filter screen is arranged on the inner wall of the filter plate, the filter plate is used to filter the gas, and the fully heated nitrogen moves downward to contact the filter plate, and the filter plate efficiently intercepts the particulate matter in the nitrogen.

[0007] According to the above technical solution, a movable plate is slidably installed on the top of the hollow plate, a telescopic frame is slidably installed inside the movable plate, a first spring is arranged between the telescopic frame and the movable plate, a roller is rotatably penetrated through the inner wall of the telescopic frame, the movable plate moves in the arc-shaped chute, and the movable plate is pushed to move to the other side along the arc-shaped chute, and the movement of the movable plate drives the telescopic frame to move synchronously.

[0008] According to the above technical solution, the bottom of the hollow plate contacts the top of the support plate, the filter plate contacts the concave surface of the aluminum plate, the roller contacts the circumferential surface of the filter plate, the roller moves towards the movable plate under the resistance of the aluminum plate, the roller disengages from the filter plate and drives the telescopic frame to move.

[0009] According to the above technical solution, a protection device for improving the sealing performance and a closing device for preventing gas backflow are arranged on the support plate; the protection device includes a hollow tube, a cylindrical rod, a second spring, a carrying frame and a sealing ring, the downward movement of the cylindrical rod stretches the second spring, and the deformed second spring rebounds to drive the cylindrical rod to reset. The hollow tube is fixedly installed at the bottom of the support plate, the cylindrical rod slides through the inner and outer walls of the hollow tube, the cylindrical rod slides through the groove of the support plate, the second spring is arranged between the cylindrical rod and the hollow tube, the carrying frame is fixedly installed at the top of the cylindrical rod, the sealing ring is arranged at the top of the carrying frame, the carrying frame contacts the inner wall of the groove, the sealing ring contacts the bottom of the hollow plate, and when the hollow plate moves downward, the hollow plate contacts and pushes the sealing ring downward.

[0010] According to the above technical solution, a sleeve is fixedly installed on the circumferential surface of the cylindrical rod. When the cylindrical rod moves, it drives the carrying frame and the sleeve to move upward synchronously. A rubber block is fixedly installed on the circumferential surface of the hollow tube, and the sleeve contacts the circumferential surface of the hollow tube.

[0011] According to the above technical solution, a rectangular groove is formed on the circumferential surface of the sleeve, and a number of rectangular blocks are arranged on the rectangular groove. The rectangular blocks on the sleeve are intermittently in contact with the rubber block, generating intermittent friction, and the frictional resistance acts on the cylindrical rod.

[0012] According to the above technical solution, the closing device includes two connecting frames, a C-shaped plate, a linkage rod, a triangular frame and a sealing plate. When the C-shaped plate moves, it drives the triangular frame to move upward, and when the triangular frame moves, it drives the sealing plate to move upward. The two connecting frames are fixedly installed at the bottom of the support plate. The C-shaped plate is slidably installed between the two connecting frames. The linkage rod is fixedly installed on the side of the C-shaped plate close to the cylindrical rod, and the linkage rod is fixedly connected to the cylindrical rod. When the cylindrical rod moves upward, the cylindrical rod drives the linkage rod to move upward. The triangular frame is fixedly installed at the bottom of the C-shaped plate, and the sealing plate is fixedly installed on the side of the triangular frame away from the C-shaped plate, and the sealing plate contacts the inner wall of the tank body.

[0013] According to the above technical solution, a T-shaped rod slidably penetrates through the surface of the connecting frame. A third spring is arranged between the T-shaped rod and the connecting frame. A pressing plate is fixedly installed on the side of the T-shaped rod close to the C-shaped plate. Bevels are formed on both sides of the C-shaped plate close to the pressing plate. An arc surface is formed at the bottom of the pressing plate. When the bevel surface contacts the arc surface, the continuous movement of the C-shaped plate forces the pressing plate to horizontally move in the direction of the linkage rod.

[0014] A recovery method of a liquid nitrogen storage tank energy-saving recovery device uses the above-mentioned liquid nitrogen storage tank energy-saving recovery device, and includes the following steps:

[0015] Step 1: The operator starts the heating round tube. The heating round tube improves the temperature inside the tank body through heat conduction and evenly transfers the heat to the aluminum plate.

[0016] Step 2: Connect the liquid nitrogen storage tank to the intake pipe of the tank body. After the liquid nitrogen in the storage tank undergoes heat exchange, it gradually vaporizes into nitrogen.

[0017] Step 3: Nitrogen enters the inside of the tank body through the intake pipe. The aluminum plate evenly heats the contacted nitrogen. After being fully heated, the nitrogen moves downward and contacts the filter plate.

[0018] Step 4: The filter plate efficiently intercepts the particulate matter in the nitrogen, separates the particulate matter from the nitrogen, and the filtered nitrogen is then discharged from the outlet pipe.

[0019] The present invention provides a liquid nitrogen storage tank energy-saving recovery device, which has the following beneficial effects:

[0020] (1) For this energy-saving recovery device of the liquid nitrogen storage tank, the filter plate filters out impurities in the low-temperature nitrogen, which can prevent the impurities in the contaminated nitrogen from affecting subsequent storage and use. After the movable plate reaches the preset position, the operator can directly remove the filter plate. By quickly adjusting the movable plate, the rollers are in close contact with the filter plate to prevent the filter plate from shifting, and quickly disengaging during maintenance, shortening the maintenance time. At the same time, the aluminum plate uniformly heats the contacted nitrogen. By uniformly heating the nitrogen through the aluminum plate, it prevents ice crystals from condensing in the pores of the filter plate, thereby maintaining the high efficiency permeability and filtering performance of the filter plate.

[0021] (2) For this energy-saving recovery device of the liquid nitrogen storage tank, the sealing ring moves to exert a continuous thrust on the bottom of the hollow plate. By applying a continuous thrust on the hollow plate, it prevents the hollow plate from tilting and colliding with the tank body when it moves upward, thus ensuring the safety of maintenance. At the same time, under the action of pressure, the sealing ring is in close fit with the hollow plate. By dynamically fitting the sealing ring with the hollow plate, it ensures that the hollow plate is correctly docked with the sealing ring during installation, preventing unfiltered nitrogen from escaping, thereby ensuring the filtering effect.

[0022] (3) For this energy-saving recovery device of the liquid nitrogen storage tank, the sealing plate is in close fit with the outlet pipe to form a complete seal. The sealing plate is automatically controlled by the lifting of the cylindrical rod without manual intervention. When an operation error occurs, it prevents the filtered nitrogen from leaking and causing recovery waste. At the same time, the pressing plate exerts a continuous pressure on the C-shaped plate. By exerting a continuous pressure on the C-shaped plate, it ensures that the C-shaped plate can be firmly in the preset position, which helps to improve the stability of the contact between the sealing plate and the outlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 is a schematic diagram of the internal structure of the tank body of the present invention;

[0025] Figure 3 is a schematic diagram of the position structure of the tank body and the support plate of the present invention;

[0026] Figure 4 is a schematic diagram of the position structure of the hollow plate of the present invention;

[0027] Figure 5 is a schematic diagram of the position structure of the hollow plate and the movable plate of the present invention;

[0028] Figure 6 For the present invention Figure 5 is an enlarged schematic diagram of part A in;

[0029] Figure 7 is a schematic diagram of the arc-shaped chute structure of the present invention;

[0030] Figure 8 For the present invention Figure 7 Schematic enlarged structure diagram at position B in the present invention;

[0031] Figure 9 Schematic structure diagram of the mounting frame and sealing ring of the present invention;

[0032] Figure 10 Schematic internal structure diagram of the hollow tube of the present invention.

[0033] In the figure: 1, tank body; 2, support plate; 3, cover plate; 4, aluminum plate; 5, heating round tube; 6, hollow plate; 7, filter plate; 8, movable plate; 9, telescopic frame; 10, first spring; 11, roller; 111, hollow tube; 112, cylindrical rod; 113, second spring; 114, mounting frame; 115, sealing ring; 116, sleeve; 117, rubber block; 121, connecting frame; 122, C-shaped plate; 123, linkage rod; 124, triangular frame; 125, sealing plate; 126, T-shaped rod; 127, third spring; 128, pressing plate. Specific embodiments

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] Please refer to Figures 1-8 , an embodiment of the present invention is: a nitrogen liquid storage tank energy-saving recovery device, including: a tank body 1, an intake pipe and an outlet pipe are arranged on the tank body 1; a support plate 2, the support plate 2 is fixedly installed inside the tank body 1, and a groove is opened at the top of the support plate 2; a cover plate 3, the cover plate 3 is arranged on the top of the tank body 1, and the cover plate 3 is fixedly connected to the tank body 1 by screws; an aluminum plate 4, the aluminum plate 4 is fixedly installed at the bottom of the cover plate 3, and the shape of the aluminum plate 4 is set to be arc-shaped; a heating round tube 5, the heating round tube 5 is fixedly installed on the surface of the aluminum plate 4, and the heating round tube 5 is used for heating gas; a hollow plate 6, the hollow plate 6 is fixedly installed at the bottom of the aluminum plate 4, and an arc-shaped chute is opened on the surface of the hollow plate 6; a filter plate 7, the filter plate 7 is arranged on the top of the hollow plate 6, a stainless steel sintered filter screen is arranged on the inner wall of the filter plate 7, and the filter plate 7 is used for filtering gas. The nitrogen is uniformly heated by the aluminum plate 4 to prevent low-temperature nitrogen from condensing ice crystals in the pores of the filter plate 7, thereby maintaining the high-efficiency permeability and filtering performance of the filter plate 7.

[0036] A movable plate 8 is slidably mounted on the top of the hollow plate 6. A telescopic frame 9 is slidably mounted inside the movable plate 8. A first spring 10 is arranged between the telescopic frame 9 and the movable plate 8. A roller 11 is rotatably penetrated through the inner wall of the telescopic frame 9. The movable plate 8 moves in the arc-shaped chute. By quickly adjusting the movable plate 8, the roller 11 is in close contact with the filter plate 7, preventing the filter plate 7 from shifting. During maintenance, it can be quickly disengaged, shortening the maintenance time.

[0037] The bottom of the hollow plate 6 contacts the top of the support plate 2. The filter plate 7 contacts the concave surface of the aluminum plate 4. The roller 11 contacts the circumferential surface of the filter plate 7. Through the stable contact between the roller 11 and the filter plate 7, it is ensured that when the filter plate 7 is in the tank body 1, it will not shift due to the vibration during work.

[0038] A recovery method of a liquid nitrogen storage tank energy-saving recovery device, using the above-mentioned liquid nitrogen storage tank energy-saving recovery device, includes the following steps:

[0039] Step 1: The operator starts the heating circular tube 5. The heating circular tube 5 increases the temperature inside the tank body 1 through heat conduction and evenly transfers the heat to the aluminum plate 4.

[0040] Step 2: Connect the liquid nitrogen storage tank to the intake pipe of the tank body 1. After the liquid nitrogen in the storage tank undergoes heat exchange, it gradually vaporizes into nitrogen.

[0041] Step 3: Nitrogen enters the inside of the tank body 1 through the intake pipe. The aluminum plate 4 evenly heats the nitrogen in contact. After being fully heated, the nitrogen moves downward and contacts the filter plate 7.

[0042] Step 4: The filter plate 7 efficiently intercepts the particulate matter in the nitrogen, separates the particulate matter from the nitrogen, and the filtered nitrogen is then discharged from the outlet pipe.

[0043] During the operation of this embodiment, the operator starts the heating circular tube 5. The heating circular tube 5 increases the temperature inside the tank body 1 through heat conduction and evenly transfers the heat to the aluminum plate 4. Subsequently, the liquid nitrogen storage tank is docked with the intake pipe of the tank body 1. After heat exchange, the liquid nitrogen in the storage tank gradually vaporizes into nitrogen gas. The nitrogen gas enters the inside of the tank body 1 through the intake pipe. The aluminum plate 4 evenly heats the contacted nitrogen gas to ensure that the temperature of the nitrogen gas rises. The fully heated nitrogen gas moves downward and contacts the filter plate 7. The filter plate 7 efficiently intercepts the particulate matter in the nitrogen gas and separates the particulate matter from the nitrogen gas. The filtered nitrogen gas is then discharged from the outlet pipe, completing the energy-saving recovery process of the liquid nitrogen. By evenly heating the nitrogen gas with the aluminum plate 4, it prevents the condensation of ice crystals in the pores of the filter plate 7 by the low-temperature nitrogen gas, thereby maintaining the high-efficiency permeability and filtration performance of the filter plate 7. During maintenance, the operator removes the screws on the cover plate 3 to release its connection with the tank body 1, and then uses a mechanical device to vertically lift the cover plate 3 upward. The movement of the cover plate 3 drives the aluminum plate 4 to move upward. The movement of the aluminum plate 4 drives the heating circular tube 5 and the hollow plate 6 to move upward synchronously. The movement of the hollow plate 6 causes it to disengage from the support plate 2 and drives the filter plate 7 to move upward until it is separated from the tank body 1. At this time, the operator pushes the movable plate 8 to move along the arc-shaped chute to the other side. The movement of the movable plate 8 drives the telescopic frame 9 to move synchronously. The movement of the telescopic frame 9 drives the roller 11 to move synchronously. The movement of the roller 11 rubs against the filter plate 7, causing the roller 11 to rotate. When the roller 11 contacts the aluminum plate 4, it moves in the direction of the movable plate 8 due to the resistance of the aluminum plate 4. The roller 11 disengages from the filter plate 7 and drives the telescopic frame 9 to move, causing the telescopic frame 9 to squeeze the first spring 10. The reverse elastic force of the first spring 10 causes the roller 11 to closely adhere to the aluminum plate 4. When the movable plate 8 reaches the preset position, the operator can directly remove the filter plate 7 for replacement or maintenance. By quickly adjusting the movable plate 8, the roller 11 is closely contacted with the filter plate 7 to prevent the filter plate 7 from shifting and quickly disengaging during maintenance, shortening the maintenance time.

[0044] Please refer to Figures 1-10 Based on the above embodiment, in another embodiment of the present invention, a protective device for improving the sealing performance and a closing device for preventing gas backflow are provided on the support plate 2; the protective device includes a hollow tube 111, a cylindrical rod 112, a second spring 113, a carrying frame 114, and a sealing ring 115. The hollow tube 111 is fixedly installed at the bottom of the support plate 2. The cylindrical rod 112 slides through the inner and outer walls of the hollow tube 111. The cylindrical rod 112 slides through the groove of the support plate 2. The second spring 113 is arranged between the cylindrical rod 112 and the hollow tube 111. The carrying frame 114 is fixedly installed at the top of the cylindrical rod 112. The sealing ring 115 is arranged at the top of the carrying frame 114. The carrying frame 114 contacts the inner wall of the groove. The sealing ring 115 contacts the bottom of the hollow plate 6. By applying a continuous thrust to the hollow plate 6, it prevents the hollow plate 6 from tilting and colliding with the tank body 1 when moving upward, thereby ensuring the safety of maintenance.

[0045] A sleeve 116 is fixedly installed on the circumferential surface of the cylindrical rod 112, and a rubber block 117 is fixedly installed on the circumferential surface of the hollow tube 111. The sleeve 116 contacts the circumferential surface of the hollow tube 111, and is dynamically attached to the hollow plate 6 through the sealing ring 115 to ensure that the hollow plate 6 is correctly docked with the sealing ring 115 during installation, preventing unfiltered nitrogen from escaping, thereby ensuring the filtering effect.

[0046] Rectangular grooves are formed on the circumferential surface of the sleeve 116, and a number of rectangular blocks are arranged on the rectangular grooves. Through the intermittent friction between the rectangular blocks and the rubber block 117, it is ensured that the cylindrical rod 112 can move smoothly.

[0047] The closing device includes two connecting frames 121, a C-shaped plate 122, a linkage rod 123, a triangular frame 124 and a sealing plate 125. The two connecting frames 121 are fixedly installed at the bottom of the support plate 2. The C-shaped plate 122 is slidably installed between the two connecting frames 121. The linkage rod 123 is fixedly installed on the side of the C-shaped plate 122 close to the cylindrical rod 112. The linkage rod 123 is fixedly connected to the cylindrical rod 112. The triangular frame 124 is fixedly installed at the bottom of the C-shaped plate 122. The sealing plate 125 is fixedly installed on the side of the triangular frame 124 away from the C-shaped plate 122. The sealing plate 125 contacts the inner wall of the tank body 1. The sealing plate 125 is automatically controlled by the lifting of the cylindrical rod 112 without manual intervention, preventing the filtered nitrogen from leaking and causing waste of recovery when an operation error occurs.

[0048] A T-shaped rod 126 slidably penetrates through the surface of the connecting frame 121. A third spring 127 is arranged between the T-shaped rod 126 and the connecting frame 121. A pressing plate 128 is fixedly installed on the side of the T-shaped rod 126 close to the C-shaped plate 122. Inclined surfaces are formed on both sides of the C-shaped plate 122 close to the pressing plate 128, and an arc surface is formed at the bottom of the pressing plate 128. By applying a continuous pressure to the C-shaped plate 122 through the pressing plate 128, it is ensured that the C-shaped plate 122 can be firmly in the preset position, which helps to improve the stability of the contact between the sealing plate 125 and the air outlet pipe.

[0049] During the operation of this embodiment, when the hollow plate 6 moves upward, the pressure exerted on the sealing ring 115 gradually decreases, and the stretched second spring 113 begins to rebound. The restoring force of the second spring 113 pushes the cylindrical rod 112 upward. The movement of the cylindrical rod 112 drives the carrying frame 114 and the sleeve 116 to move upward synchronously. The upward movement of the carrying frame 114 causes it to disengage from the groove and drives the sealing ring 115 to move upward. The movement of the sealing ring 115 exerts a continuous thrust on the bottom of the hollow plate 6, and the hollow plate 6 rises steadily under the action of the thrust. When the hollow plate 6 moves up to the preset height, its bottom disengages from the sealing ring 115. At the same time, the sleeve 116 moves upward, and the rectangular block on the sleeve 116 intermittently contacts the rubber block 117, generating intermittent friction. The frictional resistance acts on the cylindrical rod 112, which can suppress the vibration when the cylindrical rod 112 moves and enhance the movement stability of the hollow plate 6. By applying a continuous thrust to the hollow plate 6, it is prevented that the hollow plate 6 tilts and collides with the tank body 1 when moving upward, thus ensuring the safety of maintenance. When the hollow plate 6 moves downward, the hollow plate 6 contacts and pushes the sealing ring 115 downward. The movement of the sealing ring 115 drives the carrying frame 114 to move downward. The movement of the carrying frame 114 drives the cylindrical rod 112 to move downward. The movement of the cylindrical rod 112 stretches the second spring 113 and drives the sleeve 116 to move downward synchronously. The movement of the sleeve 116 repeats the above movement, making the rectangular block and the rubber block 117 have intermittent friction to ensure smooth movement until the carrying frame 114 contacts the groove. The support plate 2 provides support for the carrying frame 114, and the sealing ring 115 remains in close contact with the hollow plate 6 under the action of pressure to ensure sealing. By dynamically fitting the sealing ring 115 to the hollow plate 6, it is ensured that the hollow plate 6 is correctly docked with the sealing ring 115 during installation, preventing unfiltered nitrogen from escaping, thus ensuring the filtering effect;

[0050] When cylindrical rod 112 moves upward, cylindrical rod 112 drives linkage rod 123 to move upward, linkage rod 123 moves and drives C-shaped plate 122 to move upward, C-shaped plate 122 moves and drives tripod 124 to move upward, tripod 124 moves and drives sealing plate 125 to move upward, makes it fit closely with the outlet pipe of tank body 1, forms complete seal, and prevents nitrogen backflow. When cylindrical rod 112 moves downward, linkage rod 123 moves accordingly and drives C-shaped plate 122 to reset, C-shaped plate 122 moves and drives tripod 124 to reset, tripod 124 moves and drives sealing plate 125 to move down to its initial position, releases the blockage of outlet pipe, and restores normal discharge of nitrogen. Sealing plate 125 is automatically controlled by the lifting and lowering of cylindrical rod 112, without manual intervention, to prevent leakage of filtered nitrogen and waste of recycling when operation fails. The third spring 127 rebounds and drives the T-shaped rod 126 and the pressure plate 128 to move to the initial position, and applies continuous pressure to the C-shaped plate 122 through the pressure plate 128, ensuring that the C-shaped plate 122 can be firmly in the preset position, which helps to improve the stability of the contact between the sealing plate 125 and the air outlet pipe.

[0051] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An energy-saving recovery device for a liquid nitrogen storage tank, characterized in that, For efficiently separating particulate matter in nitrogen, including: A tank body (1) with an intake pipe and an outlet pipe provided thereon; A support plate (2) fixedly installed inside the tank body (1), and a groove is formed at the top of the support plate (2); A cover plate (3) provided on the top of the tank body (1), and the cover plate (3) is fixedly connected to the tank body (1) by screws; An aluminum plate (4) fixedly installed at the bottom of the cover plate (3), and the shape of the aluminum plate (4) is arc-shaped; A heating round tube (5) fixedly installed on the surface of the aluminum plate (4), and the heating round tube (5) is used for heating the gas; A hollow plate (6) fixedly installed at the bottom of the aluminum plate (4), and an arc-shaped sliding groove is formed on the surface of the hollow plate (6); A filter plate (7) provided on the top of the hollow plate (6), a stainless steel sintered filter screen is provided on the inner wall of the filter plate (7), and the filter plate (7) is used for filtering the gas.

2. The energy-saving recovery device for a liquid nitrogen storage tank according to claim 1, characterized in that: A movable plate (8) is slidably installed on the top of the hollow plate (6), a telescopic frame (9) is slidably installed inside the movable plate (8), a first spring (10) is provided between the telescopic frame (9) and the movable plate (8), a roller (11) is rotatably penetrated through the inner wall of the telescopic frame (9), and the movable plate (8) moves in the arc-shaped sliding groove; Among them, a protection device for improving the sealing performance and a closing device for preventing gas backflow are provided on the support plate (2).

3. An energy-saving recovery device for a liquid nitrogen storage tank according to claim 2, characterized in that: The bottom of the hollow plate (6) contacts the top of the support plate (2), the filter plate (7) contacts the concave surface of the aluminum plate (4), and the roller (11) contacts the circumferential surface of the filter plate (7).

4. The energy-saving recovery device for a liquid nitrogen storage tank according to claim 3, wherein: The protection device includes a hollow tube (111), a cylindrical rod (112), a second spring (113), a carrying frame (114) and a sealing ring (115). The hollow tube (111) is fixedly installed at the bottom of the support plate (2), the cylindrical rod (112) slides through the inner and outer walls of the hollow tube (111), the cylindrical rod (112) slides through the groove of the support plate (2), the second spring (113) is provided between the cylindrical rod (112) and the hollow tube (111), the carrying frame (114) is fixedly installed at the top of the cylindrical rod (112), the sealing ring (115) is provided at the top of the carrying frame (114), the carrying frame (114) contacts the inner wall of the groove, and the sealing ring (115) contacts the bottom of the hollow plate (6).

5. The energy-saving recovery device for a liquid nitrogen storage tank according to claim 4, characterized in that: A sleeve (116) is fixedly installed on the circumferential surface of the cylindrical rod (112), a rubber block (117) is fixedly installed on the circumferential surface of the hollow tube (111), and the sleeve (116) contacts the circumferential surface of the hollow tube (111).

6. The energy-saving recovery device for a liquid nitrogen storage tank according to claim 5, characterized in that: A rectangular groove is formed on the circumferential surface of the sleeve (116), and a plurality of rectangular blocks are provided on the rectangular groove.

7. An energy-saving recovery device for a liquid nitrogen storage tank according to claim 6, characterized in that: The closing device includes two connecting frames (121), a C-shaped plate (122), a linkage rod (123), a triangular frame (124) and a sealing plate (125). The two connecting frames (121) are fixedly installed at the bottom of the support plate (2). The C-shaped plate (122) is slidably installed between the two connecting frames (121). The linkage rod (123) is fixedly installed on the side of the C-shaped plate (122) close to the cylindrical rod (112). The linkage rod (123) is fixedly connected to the cylindrical rod (112). The triangular frame (124) is fixedly installed at the bottom of the C-shaped plate (122). The sealing plate (125) is fixedly installed on the side of the triangular frame (124) away from the C-shaped plate (122). The sealing plate (125) contacts the inner wall of the tank body (1).

8. An energy-saving recovery device for a liquid nitrogen storage tank according to claim 7, characterized in that: A T-shaped rod (126) slidably penetrates through the surface of the connecting frame (121). A third spring (127) is arranged between the T-shaped rod (126) and the connecting frame (121). A pressing plate (128) is fixedly installed on the side of the T-shaped rod (126) close to the C-shaped plate (122). Slopes are formed on both sides of the C-shaped plate (122) close to the pressing plate (128). An arc surface is formed at the bottom of the pressing plate (128).

9. A recovery method for an energy-saving recovery device of a liquid nitrogen storage tank, using the energy-saving recovery device of a liquid nitrogen storage tank described in claim 8, characterized in that, It includes the following steps: Step 1: The operator starts the heating circular tube (5). The heating circular tube (5) increases the temperature inside the tank body (1) through heat conduction and evenly transfers the heat to the aluminum plate (4). Step 2: The liquid nitrogen storage tank is docked with the intake pipe of the tank body (1). After heat exchange, the liquid nitrogen in the storage tank gradually vaporizes into nitrogen gas. Step 3: The nitrogen gas enters the inside of the tank body (1) through the intake pipe. The aluminum plate (4) evenly heats the contacted nitrogen gas. After being fully heated, the nitrogen gas moves downward and contacts the filter plate (7). Step 4: The filter plate (7) efficiently intercepts the particulate matter in the nitrogen gas, separates the particulate matter from the nitrogen gas, and the filtered nitrogen gas is then discharged from the outlet pipe.

Images