Low-temperature nitrogen energy recycling device

Abstract

The utility model relates to the technical field of nitrogen recovery, in particular to a low-temperature nitrogen energy recycling device which comprises a nitrogen treatment box, a spiral pipe communicated with a low-temperature nitrogen pipe is fixedly installed in an inner cavity of the nitrogen treatment box, and a cooling mechanism for circularly cooling nitrogen is arranged in the inner cavity of the nitrogen treatment box. Low-temperature nitrogen enters the inner cavity of the spiral pipe by opening the valve on the air inlet pipe, meanwhile, a power source of the water pump is connected, normal-temperature water forms a water curtain through the water distribution plate and the water distribution nozzles, the normal-temperature water is cooled through heat exchange between the water curtain and the low-temperature nitrogen, and energy recycling is achieved; the normal-temperature water enters the water collecting hopper after being changed into low-temperature cooling water, the low-temperature cooling water in the water collecting hopper returns to the water curtain through the water pump and continues to be cooled through the low-temperature nitrogen, energy recovery can be well conducted on the low-temperature nitrogen through multiple times of circulating heat exchange, and then the energy recovery efficiency of the low-temperature nitrogen can be improved to the maximum degree.

Description

Technical Field

[0001] The utility model relates to the technical field of nitrogen recovery, in particular to a low-temperature nitrogen energy recovery and reuse device. Background Art

[0002] Cryogenic nitrogen is produced by the gasification of liquid nitrogen. In industry, cryogenic nitrogen is an important raw material for synthesizing ammonia, preparing nitric acid and fertilizers. It can also be used as a protective gas for foods such as grains, canned foods and fruits.

[0003] When liquid nitrogen is used in the industrial sector, a large amount of low-temperature nitrogen will be generated. In the prior art, there is a utility model patent with a publication (announcement) number of CN219640023U and a name of a low-temperature nitrogen recovery device, which includes a tank body, a partition is installed in the middle of the inner cavity of the tank body, and a first water storage tank and a second water storage tank are respectively arranged on the upper and lower sides of the partition. An air outlet pipe is installed on one side of the surface of the tank body, and a recovery mechanism is installed at the output end of the air outlet pipe. The utility model uses low-temperature nitrogen to cool down hot water, and the cooled hot water can be used for bathing or other places, and the collected low-temperature nitrogen can be used as food protection gas or for inflating automobile tires.

[0004] The device of this patent allows low-temperature nitrogen to enter the inner cavity of the curved pipe, so that the curved pipe is quickly cooled down, and then the hot water in the inner cavity of the second water storage tank is cooled down. Although the device of this patent can use low-temperature nitrogen to cool down the hot water, it is not convenient to cool down the low-temperature nitrogen well by only performing heat exchange through curved pipes, which is easy to cause energy loss. Utility Model Content

[0005] The utility model aims to provide a low-temperature nitrogen energy recovery and reuse device.

[0006] The technical problem solved by the utility model is that the existing equipment only uses curved pipes to perform heat exchange, which is inconvenient to cool the low-temperature nitrogen well, and thus easily causes energy loss.

[0007] The utility model can be implemented through the following technical scheme: a low-temperature nitrogen energy recovery and reuse device, including a nitrogen treatment box, the inner cavity of the nitrogen treatment box is fixedly installed with a spiral tube connected to the low-temperature nitrogen pipe, the spiral tube is a copper tube, and the arrangement of the spiral tube facilitates cooling of normal temperature water; the inner cavity of the nitrogen treatment box is provided with a cooling mechanism for cooling the nitrogen circulation, the cooling mechanism comprises a heat preservation water tank fixedly connected to the bottom end of the nitrogen treatment box, a water distribution plate is fixedly installed on the inner wall of the nitrogen treatment box, a plurality of uniformly distributed water distribution nozzles are fixedly installed at the bottom end of the water distribution plate, the water distribution plate and the plurality of uniformly distributed water distribution nozzles are arranged to facilitate the introduction of normal temperature water to form a water curtain, and the water curtain facilitates energy recovery of the low-temperature nitrogen in the inner cavity of the spiral tube, wherein the water curtain heat exchange area is about 40 square meters, and the heat preservation water tank is connected to the water distribution plate through a water pump.

[0008] The further technical improvement of the utility model is that: a circulating water temporary storage tank is opened in the inner cavity of the thermal insulation water tank, and a water collecting hopper connected with the circulating water temporary storage tank in the inner cavity of the thermal insulation water tank is fixedly installed at the bottom of the inner wall of the nitrogen treatment box.

[0009] A further technical improvement of the utility model is that: the inner cavity of the thermal insulation water tank is further provided with a normal temperature water tank connected to a water pump, and the liquid in the inner cavity of the circulating water temporary storage tank and the liquid in the inner cavity of the normal temperature water tank are separated by an electromagnetic valve. By utilizing the electromagnetic valve to separate the liquid in the inner cavity of the circulating water temporary storage tank and the liquid in the inner cavity of the normal temperature water tank, it is avoided that the processing speed of the low-temperature nitrogen is delayed due to uneven mixing of normal temperature water and low-temperature cooling water.

[0010] A further technical improvement of the utility model is that a floating plate is slidably connected to the inner wall of the normal temperature water tank, and a trigger switch electrically connected to the electromagnetic valve and the water pump is fixedly installed on the inner wall of the normal temperature water tank and above and below the floating plate. As the normal temperature water in the normal temperature water tank in the inner cavity of the thermal insulation water tank is continuously used, the liquid level in the inner cavity will continue to drop, and the floating plate will drop synchronously with the liquid level until the floating plate contacts the trigger switch. Since the trigger switch electromagnetic valve and the water pump are electrically connected to the trigger switch, at this time, the trigger switch will first cut off the power supply of the water pump, and then make the circulating water temporarily closed through the electromagnetic valve. The cooling water in the inner cavity of the storage tank enters the normal temperature water tank. As the low-temperature cooling water continues to enter, the float plate will rise synchronously with the liquid level until the float plate contacts the trigger switch. Since the trigger switch solenoid valve and water pump are electrically connected to the trigger switch, at this time, the trigger switch will cause the solenoid valve to close the circulating water temporary storage tank and turn on the power of the water pump. The water pump is driven to cool the liquid in the inner cavity of the normal temperature water tank again, and after cooling, it enters the inner cavity of the circulating water temporary storage tank. The low-temperature nitrogen is cooled reciprocally, which is beneficial to maximize the energy recovery efficiency of the low-temperature nitrogen and reduce energy loss.

[0011] A further technical improvement of the utility model is that a sealing door is hinged on the front of the nitrogen treatment box, a sealing mechanism for closing the sealing door is provided in the inner cavity of the nitrogen treatment box, the sealing mechanism includes a sealing strip fixedly connected to the sealing door, and a sealing groove matched with the sealing strip is provided in the inner cavity of the nitrogen treatment box. The provision of the sealing door facilitates the user to maintain the components in the inner cavity of the nitrogen treatment box, thereby facilitating the extension of the overall service life of the equipment.

[0012] A further technical improvement of the utility model is that: a first magnetic strip is embedded in the inner cavity of the sealing strip, and a second magnetic strip with a magnetic property opposite to that of the first magnetic strip is fixedly installed on the inner wall of the sealing groove. When there is no need to maintain the components in the inner cavity of the nitrogen treatment box, the sealing strip on the sealing door will enter the sealing groove in the inner cavity of the nitrogen treatment box by closing the sealing door, and the first magnetic strip in the sealing strip and the second magnetic strip on the inner wall of the sealing groove are arranged in coordination to facilitate filling of the gap between the nitrogen treatment box and the sealing door, thereby facilitating the closure of the nitrogen treatment box and facilitating subsequent use of the equipment.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The utility model opens the valve on the air inlet pipe to allow the low-temperature nitrogen to enter the inner cavity of the spiral tube through the air inlet pipe. At the same time, the power of the water pump is turned on, so that the normal-temperature water in the inner cavity of the normal-temperature water tank passes through the water distribution plate and the water distribution nozzle to form a water curtain. The normal-temperature water is cooled by the heat exchange between the water curtain and the low-temperature nitrogen in the spiral tube, and energy recovery and reuse are achieved. After the normal-temperature water becomes low-temperature cooling water, it enters the water collecting bucket. The low-temperature cooling water in the water collecting bucket returns to the water curtain through the water pump and continues to be cooled by the low-temperature nitrogen. Through multiple cycles of heat exchange, it is convenient to recover the energy of the low-temperature nitrogen, which is beneficial to maximize the energy recovery efficiency of the low-temperature nitrogen and reduce energy loss.

[0015] 2. A sealing door is hinged on the front of the nitrogen treatment box of the utility model, and a sealing mechanism for closing the sealing door is provided in the inner cavity of the nitrogen treatment box. The setting of the sealing door facilitates the user to maintain the components in the inner cavity of the nitrogen treatment box, thereby facilitating the extension of the overall service life of the equipment; when no maintenance is required, the sealing door is closed, and the sealing strip on the sealing door enters the sealing groove in the inner cavity of the nitrogen treatment box, and the first magnetic strip in the sealing strip and the second magnetic strip on the inner wall of the sealing groove are provided in coordination to facilitate the filling of the gap between the nitrogen treatment box and the sealing door, thereby facilitating the sealing of the nitrogen treatment box and facilitating the subsequent use of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0019] Figure 3 For this utility model Figure 1 A partial enlarged view of the middle A;

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the spiral tube of the utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the sealing door of the utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the nitrogen treatment box of the utility model when the sealing door is not installed.

[0023] In the figure:

[0024] 1. Nitrogen treatment box; 11. Spiral tube; 12. Inlet pipe; 13. Exhaust pipe; 14. Guide ramp; 15. Sealing door; 151. Sealing strip; 152. First magnetic strip; 153. Sealing groove; 154. Second magnetic strip;

[0025] 2. Insulated water tank; 21. Circulating water temporary storage tank; 22. Normal temperature water tank; 23. Solenoid valve; 24. Water pump; 25. Connecting pipe; 26. Water pipe; 27. Water distribution plate; 28. Water distribution nozzle; 29. ​​Water collecting bucket; 210. Filter plate; 211. Sliding groove; 212. Sliding block; 213. Floating plate; 214. Trigger switch; 215. Drain pipe; 216. Temperature indicator. DETAILED DESCRIPTION

[0026] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0027] See also Figure 1-6As shown, this embodiment provides a technical solution, a low-temperature nitrogen energy recovery and reuse device, including an insulated water tank 2, a nitrogen treatment box 1 is fixedly installed on the top of the insulated water tank 2, a spiral tube 11 is fixedly installed in the inner cavity of the nitrogen treatment box 1 through a fixing rod, an air inlet pipe 12 connected to one end of the spiral tube 11 is fixedly installed on the side wall of the nitrogen treatment box 1, the air inlet pipe 12 is connected to the low-temperature nitrogen pipe, and an exhaust pipe 13 connected to the other end of the spiral tube 11 is fixedly installed on the top of the nitrogen treatment box 1. Valves are arranged on the air inlet pipe 12 and the exhaust pipe 13, and the arrangement of the valves facilitates The inlet and outlet of low-temperature nitrogen is artificially controlled; a water distribution plate 27 is fixedly installed on the top of the inner wall of the nitrogen treatment box 1, and a plurality of evenly distributed water distribution nozzles 28 are fixedly installed on the bottom end of the water distribution plate 27. The water distribution plate 27 and the plurality of evenly distributed water distribution nozzles 28 are arranged to facilitate the introduction of normal temperature water to form a water curtain, and the energy of the low-temperature nitrogen in the inner cavity of the spiral tube 11 is conveniently recovered through the water curtain; a water pump 24 is fixedly installed on the side wall of the insulated water tank 2, and a water pipe 26 is connected to the water outlet end of the water pump 24, and the water pipe 26 passes through the insulated water tank 2 and extends to the inner cavity of the insulated water tank 2 to be connected with the water distribution plate 27.

[0028] The top ends of the two inner side walls of the nitrogen treatment box 1 are symmetrically fixed with guide inclined plates 14 , which are used to guide the water curtain so that the water curtain can recover energy from the low-temperature nitrogen in the inner cavity of the spiral tube 11 .

[0029] The inner cavity of the insulated water tank 2 is provided with a circulating water temporary storage tank 21 and a normal temperature water tank 22. A water collecting bucket 29 is fixedly installed at the bottom of the inner wall of the nitrogen treatment box 1. A filter plate 210 is slidably connected between the two inner side walls of the water collecting bucket 29. The filter plate 210 is used to filter the cooling water after cooling to prevent the cooling water from clogging the water pump 24. In addition, the filter plate 210 and the water collecting bucket 29 are detachably connected. Through the detachable connection between the two, it is convenient for the user to clean the filter plate 210. The bottom end of the water collecting bucket 29 is connected to the circulating water temporary storage tank 21 in the inner cavity of the insulated water tank 2.

[0030] The liquid in the inner cavity of the circulating water temporary storage tank 21 and the liquid in the inner cavity of the normal temperature water tank 22 are separated by an electromagnetic valve 23. A sliding groove 211 is provided on the inner wall of the normal temperature water tank 22. A sliding block 212 is slidably connected to the inner wall of the sliding groove 211. A floating plate 213 slidably connected to the inner wall of the normal temperature water tank 22 is fixedly connected on the side of the sliding block 212 away from the sliding groove 211. A trigger switch 214 electrically connected to the electromagnetic valve 23 is fixedly installed on the top and bottom of the inner wall of the sliding groove 211. The trigger switch 214 is also electrically connected to the water pump 24. A connecting pipe 25 is connected to the water inlet end of the water pump 24, and the connecting pipe 25 is connected to the normal temperature water tank 22 in the inner cavity of the thermal insulation water tank 2.

[0031] A drain pipe 215 connected to the normal temperature water tank 22 in the inner cavity of the thermal insulation water tank 2 is fixedly installed at the bottom end of the thermal insulation water tank 2. A valve is provided on the drain pipe 215, and the valve is convenient for the user to control the opening and closing of the drain pipe 215.

[0032] At least one temperature indicator 216 for indicating the temperature is arranged on the front of the thermal insulation water tank 2 .

[0033] A sealing door 15 is hinged on the front of the nitrogen treatment box 1, and a sealing strip 151 is fixedly installed on one side of the sealing door 15 close to the inner cavity of the nitrogen treatment box 1. The inner cavity of the nitrogen treatment box 1 is provided with a sealing groove 153 matching the sealing strip 151, and a first magnetic strip 152 is embedded in the inner cavity of the sealing strip 151, and a second magnetic strip 154 ​​with opposite magnetic properties to the first magnetic strip 152 is fixedly installed on the inner wall of the sealing groove 153.

[0034] When the utility model is in use, the valve on the air inlet pipe 12 is opened to allow the low-temperature nitrogen to enter the inner cavity of the spiral tube 11 through the air inlet pipe 12. At the same time, the power supply of the water pump 24 is turned on, so that the normal-temperature water in the inner cavity of the normal-temperature water tank 22 passes through the water distribution plate 27 and the water distribution nozzle 28 to form a water curtain. The normal-temperature water is cooled by the heat exchange between the water curtain and the low-temperature nitrogen in the spiral tube 11, thereby realizing energy recovery and reuse.

[0035] After being cooled, the normal temperature water enters the water collecting bucket 29. The filter plate 210 arranged in the inner cavity of the water collecting bucket 29 facilitates filtering of the cooling water. After filtering, the cooling water enters the circulating water temporary storage tank 21 in the inner cavity of the thermal insulation water tank 2. As the normal temperature water in the normal temperature water tank 22 in the inner cavity of the thermal insulation water tank 2 is continuously used, the liquid level in its inner cavity will continue to drop, and the floating plate 213 will drop synchronously with the liquid level until the floating plate 213 contacts the trigger switch 214. Since the electromagnetic valve 23 and the water pump 24 of the trigger switch 214 are electrically connected to the trigger switch 214, at this time, the trigger switch 214 will first cut off the power supply of the water pump 24, and then allow the cooling water in the inner cavity of the circulating water temporary storage tank 21 to enter the normal temperature water tank 22 through the electromagnetic valve 23. As the low-temperature cooling water continues to enter the floating plate 213, it will rise synchronously with the liquid level until the floating plate 213 contacts the trigger switch 214. Since the solenoid valve 23 and the water pump 24 of the trigger switch 214 are electrically connected to the trigger switch 214, at this time, the trigger switch 214 will cause the solenoid valve 23 to close the circulating water temporary storage tank 21 and turn on the power of the water pump 24. The liquid in the inner cavity of the normal temperature water tank 22 is cooled again by the drive of the water pump 24. After cooling, it enters the inner cavity of the circulating water temporary storage tank 21, and repeats this process until the temperature of the cooling water reaches 8 degrees Celsius. After reaching 8 degrees Celsius, it can be conveniently used by the staff through the drain pipe 215. The low-temperature nitrogen becomes normal temperature nitrogen after passing through the water curtain and is discharged into the atmosphere through the exhaust pipe 13.

[0036] The utility model separates the liquid in the inner cavity of the circulating water temporary storage tank 21 from the liquid in the inner cavity of the normal temperature water tank 22 by using the electromagnetic valve 23, thereby avoiding delaying the processing speed of the low temperature nitrogen due to uneven mixing of the normal temperature water and the low temperature cooling water.

[0037] When the spiral tube 11 needs to be maintained or the filter plate 210 needs to be cleaned, the maintenance can be performed through the sealing door 15 . After the maintenance, the nitrogen treatment box 1 can be sealed by closing the sealing door 15 .

[0038] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A low-temperature nitrogen energy recovery and reuse device, comprising a nitrogen treatment box (1), characterized in that: The inner cavity of the nitrogen treatment box (1) is fixedly mounted with a spiral tube (11) connected to a low-temperature nitrogen pipe. The inner cavity of the nitrogen treatment box (1) is provided with a cooling mechanism for cooling the nitrogen circulation. The cooling mechanism comprises a heat preservation water tank (2) fixedly connected to the bottom end of the nitrogen treatment box (1). A water distribution plate (27) is fixedly mounted on the inner wall of the nitrogen treatment box (1). A plurality of evenly distributed water distribution nozzles (18) are fixedly mounted at the bottom end of the water distribution plate (27). The heat preservation water tank (2) is connected to the water distribution plate (27) via a water pump (24).

2. A low-temperature nitrogen energy recovery and reuse device according to claim 1, characterized in that: The inner cavity of the thermal insulation water tank (2) is provided with a circulating water temporary storage tank (21), and the bottom of the inner wall of the nitrogen treatment box (1) is fixedly installed with a water collecting hopper (29) which is in communication with the circulating water temporary storage tank (21) in the inner cavity of the thermal insulation water tank (2).

3. A low-temperature nitrogen energy recovery and reuse device according to claim 2, characterized in that: The inner cavity of the heat-insulating water tank (2) is also provided with a normal-temperature water tank (22) connected to a water pump (24), and the liquid in the inner cavity of the circulating water temporary storage tank (21) and the liquid in the inner cavity of the normal-temperature water tank (22) are separated by a solenoid valve (23).

4. The low-temperature nitrogen energy recovery and reuse device according to claim 3 is characterized in that: The inner wall of the normal temperature water tank (22) is slidably connected to a floating plate (213), and a trigger switch (214) electrically connected to the electromagnetic valve (23) and the water pump (24) is fixedly installed on the inner wall of the normal temperature water tank (22) and above and below the floating plate (213).

5. The low-temperature nitrogen energy recovery and reuse device according to claim 1, characterized in that: The front of the nitrogen treatment box (1) is hinged with a sealing door (15); the inner cavity of the nitrogen treatment box (1) is provided with a sealing mechanism for closing the sealing door (15); the sealing mechanism comprises a sealing strip (151) fixedly connected to the sealing door (15); and the inner cavity of the nitrogen treatment box (1) is provided with a sealing groove (153) matched with the sealing strip (151).

6. The low-temperature nitrogen energy recovery and reuse device according to claim 5, characterized in that: A first magnetic strip (152) is embedded in the inner cavity of the sealing strip (151), and a second magnetic strip (154) having a magnetic property opposite to that of the first magnetic strip (152) is fixedly mounted on the inner wall of the sealing groove (153).

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