Liquid oxygen vaporizer

Abstract

The utility model discloses a liquid oxygen vaporizer which comprises a tank body, a liquid inlet, a gas outlet, a heat exchange assembly, a circulating water assembly, a steam heating assembly, a temperature monitoring assembly and a safety assembly, the top of the tank body is provided with the liquid inlet and the gas outlet, the heat exchange assembly is arranged in the tank body and connected with the liquid inlet and the gas outlet, and the temperature monitoring assembly is arranged in the tank body. The steam heating assembly extends to the bottom of the inner wall of the tank from the top of the tank, the circulating water assembly is communicated with the inner wall of the tank, and a temperature monitoring assembly and a safety assembly are arranged on the tank. The vaporizer has the advantages of being reasonable in structure, safe, reliable, even in heating and high in vaporizing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment, specifically to a liquid oxygen vaporizer. Background Technology

[0002] At room temperature and high pressure, the mass of the same volume of liquid oxygen is approximately 270-300 times greater than that under standard conditions. This significantly increases the storage and transportation capacity of liquid oxygen, and more importantly, makes its utilization more convenient and flexible. Compressed liquid oxygen is widely used in medical and industrial production fields.

[0003] In scenarios where oxygen is needed, such as hospital collaborations and businesses, liquefied oxygen needs to be vaporized into a gas at room temperature for use.

[0004] Liquid oxygen vaporizers come in several types, including ambient air vaporizers and heated vaporizers. Ambient air vaporizers utilize natural air convection to heat the cryogenic liquid in the heat exchange tubes, causing it to completely evaporate into gas. This type requires no additional energy consumption and has environmental advantages. Its structure mainly consists of star-shaped finned heat pipes, liquid-gas flow pipes, supports, and a base, using corrosion-resistant materials to ensure long-term stable operation. However, ambient air vaporizers are highly dependent on ambient temperature and have low efficiency.

[0005] Existing heated vaporizers also suffer from the following drawbacks: low liquid oxygen vaporization efficiency and uneven heating temperature. Summary of the Invention

[0006] In order to solve the above problems, the purpose of this utility model is to provide a liquid oxygen vaporizer with reasonable structure, safety and reliability, uniform heating and high vaporization efficiency.

[0007] According to one aspect of this utility model, a liquid oxygen vaporizer is provided, comprising: a tank, a liquid inlet, an outlet, a heat exchange component, a circulating water component, a steam heating component, a temperature monitoring component, and a safety component. The tank has a liquid inlet and an outlet at its top. The heat exchange component is disposed within the tank and connects to the liquid inlet and outlet. The steam heating component extends from the top of the tank to the bottom of the inner wall of the tank. The circulating water component communicates with the inner wall of the tank. The temperature monitoring component and the safety component are mounted on the tank. The heat exchange component enables efficient liquid oxygen vaporization; the combination of the circulating water component and the steam heating component ensures more uniform heating within the tank; the temperature monitoring component monitors the temperature at different locations within the tank; and the safety component prevents excessive pressure within the tank.

[0008] In some embodiments, the heat exchange assembly includes: a first connecting pipe, a first circulation pipe, a second connecting pipe, a second circulation pipe, a first vaporization section, and a second vaporization section. One end of the first connecting pipe is connected to a liquid inlet, and the other end of the first connecting pipe is connected to the first circulation pipe. The bottom of the second connecting pipe is connected to the second circulation pipe. The first circulation pipe is located below the inner wall of the tank, and the second circulation pipe is located above the first circulation pipe. The bottom of the first vaporization section is connected to the first circulation pipe, and the top of the first vaporization section is connected to the second circulation pipe. The bottom of the second vaporization section is connected to the first circulation pipe, and the top of the second vaporization section is connected to the second circulation pipe. By circulating liquid oxygen through the first and second vaporization sections, the vaporization efficiency of liquid oxygen is improved, while maximizing the utilization of the heating medium.

[0009] In some embodiments, the first vaporization section includes a plurality of vaporization tubes connected to the first circulation pipe and the second circulation pipe. The presence of multiple vaporization tubes ensures sufficient contact area with the heating medium, thereby improving the vaporization efficiency of liquid oxygen.

[0010] In some embodiments, the structure of the first vaporization section is the same as that of the second vaporization section.

[0011] In some embodiments, the circulating water assembly includes a circulating water inlet, a circulating water outlet, and a water pump. Both the circulating water inlet and outlet are located on the outer wall of the tank and communicate with the interior of the tank. The water pump is connected to the circulating water inlet and outlet via pipes, with the circulating water outlet located above the circulating water outlet. Controlling the water flow controls the heating temperature, resulting in more uniform heating.

[0012] In some embodiments, the steam heating assembly includes a steam port, a third connecting pipe, and a steam outlet. The steam port is located between the liquid inlet and the air outlet and is connected to an external air source. The top of the third connecting pipe communicates with the steam port, and the bottom of the third connecting pipe is connected to the steam outlet. At least two steam outlets are provided, and the steam outlets are located below the first circulation pipe. By releasing steam from the bottom of the tank to heat the circulating water, it is convenient to heat the circulating water that first enters the tank, and multiple steam outlets facilitate uniform heating.

[0013] In some embodiments, the temperature monitoring component includes a first temperature sensor, a second temperature sensor, and a thermometer. Both the first and second temperature sensors are disposed on the outer wall of the tank and communicate with the interior of the tank. The first temperature sensor is located at the bottom of the tank, the second temperature sensor is located at the top of the tank, and the thermometer is disposed on the outer wall of the tank, positioned between the first and second temperature sensors. By placing temperature sensors and thermometers at different locations within the tank, it is convenient to monitor the temperature at different locations inside the tank.

[0014] In some embodiments, the safety components include: a vent pipe, an overflow port, a first level gauge, and a second level gauge. The vent pipe is located at the top of the tank, and the overflow port is located above the side wall of the tank. Both the first and second level gauges are located above the outer wall of the tank, with the second level gauge positioned above the first level gauge. The two level gauges facilitate monitoring of the liquid level inside the tank, while the overflow port and vent pipe prevent excessive pressure within the tank.

[0015] In some embodiments, a manhole communicating with the outside is provided at the bottom of the tank, and a drain outlet and a sewage outlet communicating with the inside of the tank are provided at the bottom of the outer wall of the tank. The manhole facilitates inspection and maintenance of the inside of the tank.

[0016] This invention features a reasonable structure, high safety and reliability, uniform heating, and high vaporization efficiency. It achieves efficient liquid oxygen vaporization through a heat exchange component, and the combination of a circulating water component and a steam heating component ensures more uniform heating within the tank. A temperature monitoring component allows for monitoring the temperature at different locations within the tank, and a safety component prevents excessive pressure within the tank. By circulating liquid oxygen through the first and second vaporization sections, the vaporization efficiency is improved while maximizing the utilization of the heating medium. Multiple vaporization pipes ensure sufficient contact area with the heating medium, further enhancing vaporization efficiency. Water flow control ensures more uniform heating by regulating the heating temperature. Steam released from the bottom of the tank heats the circulating water, facilitating heating of the water entering the tank initially, and multiple steam outlets ensure uniform heating. Temperature sensors and thermometers at different locations within the tank facilitate temperature monitoring. Two level gauges monitor the liquid level within the tank, and an overflow port and vent pipe prevent excessive pressure within the tank. A manhole facilitates maintenance and repair within the tank. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a liquid oxygen vaporizer according to the present invention;

[0018] Figure 2 This is a top view of a liquid oxygen vaporizer according to the present invention. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, it should be noted that these embodiments are not intended to limit the present invention. Equivalent transformations or substitutions in function, method or structure made by those skilled in the art based on these embodiments are all within the protection scope of the present invention.

[0020] In the description of this utility model, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two components. They can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the terms according to the specific circumstances.

[0021] like Figure 1 and Figure 2 As shown, the liquid oxygen vaporizer of this utility model includes: a tank body 1, a liquid inlet 2, an outlet 3, a heat exchange assembly 4, a circulating water assembly 5, a steam heating assembly 6, a temperature monitoring assembly 7, and a safety assembly 8. The top of the tank body 1 has the liquid inlet 2 and the outlet 3. The heat exchange assembly 4 is disposed inside the tank body 1 and connects the liquid inlet 2 and the outlet 3. The steam heating assembly 6 extends from the top of the tank body 1 to the bottom of the inner wall of the tank body 1. The circulating water assembly 5 communicates with the inner wall of the tank body 1. The temperature monitoring assembly 7 and the safety assembly 8 are installed on the tank body 1. The heat exchange assembly 4 achieves efficient liquid oxygen vaporization. The cooperation between the circulating water assembly 5 and the steam heating assembly 6 makes the heating inside the tank body 1 more uniform. The temperature monitoring assembly 7 can monitor the temperature at different locations inside the tank body 1. The safety assembly 8 prevents excessive pressure inside the tank body 1.

[0022] The heat exchange assembly 4 includes: a first connecting pipe 41, a first circulation pipe 42, a second connecting pipe 43, a second circulation pipe 44, a first vaporization section 45, and a second vaporization section 46. One end of the first connecting pipe 41 is connected to the liquid inlet 2, and the other end of the first connecting pipe 41 is connected to the first circulation pipe 42. The bottom of the second connecting pipe 43 is connected to the second circulation pipe 44. The first circulation pipe 42 is located below the inner wall of the tank 1, and the second circulation pipe 44 is located above the first circulation pipe 42. The bottom of the first vaporization section 45 is connected to the first circulation pipe 42, and the top of the first vaporization section 45 is connected to the second circulation pipe 44. The bottom of the second vaporization section 46 is connected to the first circulation pipe 42, and the top of the second vaporization section 46 is connected to the second circulation pipe 44. By circulating liquid oxygen through the first vaporization section 45 and the second vaporization section 46, the vaporization efficiency of liquid oxygen is improved, while maximizing the utilization of the heating medium.

[0023] During implementation, the outer wall of the first connecting pipe 41 is equipped with an outer shell, and the outer shell is filled with heat-insulating material. Because the first connecting pipe 41 is in a heated medium, after liquid oxygen enters the first connecting pipe 41, it expands rapidly after heating. Therefore, the oxygen needs to expand and be expelled after entering the first circulation pipe 42, the first vaporization section 45, and the second vaporization section 46 to prevent excessive pressure inside the first connecting pipe 41. Therefore, the outer shell and the heat-insulating material inside the outer shell need to cover the entire length from the liquid inlet 2 to the first circulation pipe 42.

[0024] The first vaporization section 45 includes a plurality of vaporization pipes 47 connected to the first circulation pipe 42 and the second circulation pipe 44. The plurality of vaporization pipes 47 ensures sufficient contact area with the heating medium, thereby improving the vaporization efficiency of liquid oxygen.

[0025] The structure of the first vaporization section 45 is the same as that of the second vaporization section 46.

[0026] In the specific implementation process, liquid oxygen flows in from the inlet 2, enters the bottom of the first vaporization section 45 and the second vaporization section 46 respectively through the first connecting pipe 41 and the first circulation pipe 42, and vaporizes under the action of the circulating water heated by steam. The gas enters the outlet 3 through the second circulation pipe 44.

[0027] The circulating water assembly 5 includes a circulating water inlet 51, a circulating water outlet 52, and a water pump 53. Both the circulating water inlet 51 and the circulating water outlet 52 are located on the outer wall of the tank 1 and communicate with the interior of the tank 1. The water pump 53 is connected to the circulating water inlet 51 and the circulating water outlet 52 via pipes. The circulating water outlet 52 is located above the circulating water outlet. Controlling the water flow controls the heating temperature and ensures more uniform heating.

[0028] The steam heating assembly 6 includes a steam port 61, a third connecting pipe 62, and a steam outlet 63. The steam port 61 is located between the liquid inlet 2 and the air outlet 3 and is connected to an external air source. The top of the third connecting pipe 62 communicates with the steam port 61, and the bottom of the third connecting pipe 62 is connected to the steam outlet 63. At least two steam outlets 63 are provided, and they are located below the first circulation pipe 42. By releasing steam from the bottom of the tank 1 to heat the circulating water, it is convenient to heat the circulating water that first enters the tank 1. Multiple steam outlets 63 facilitate uniform heating. The third connecting pipe 62 at the bottom of the steam port 61 is located in the middle of the tank 1 and also heats the circulating water during steam transport.

[0029] The temperature monitoring component 7 includes a first temperature sensor 71, a second temperature sensor 72, and a thermometer 73. Both the first temperature sensor 71 and the second temperature sensor 72 are disposed on the outer wall of the tank 1 and communicate with the interior of the tank 1. The first temperature sensor 71 is located below the tank 1, and the second temperature sensor 72 is located above the tank 1. The thermometer 73 is disposed on the outer wall of the tank 1, positioned between the first temperature sensor 71 and the second temperature sensor 72. By placing the temperature sensors and thermometer 73 at different locations within the tank 1, it is convenient to monitor the temperature at different locations inside the tank 1.

[0030] Safety component 8 includes: a vent pipe 81, an overflow port 82, a first level gauge 83, and a second level gauge 84. The vent pipe 81 is located at the top of the tank body 1, and the overflow port 82 is located above the side wall of the tank body 1. Both the first level gauge 83 and the second level gauge 84 are located above the outer wall of the tank body 1, with the second level gauge 84 positioned above the first level gauge 83. The two level gauges facilitate monitoring of the liquid level inside the tank body 1, while the overflow port 82 and the vent pipe 81 prevent excessive pressure inside the tank body 1.

[0031] A manhole 9 communicating with the outside is provided at the bottom of the tank body 1, and a drain outlet 10 and a sewage outlet 11 communicating with the inside of the tank body 1 are provided at the bottom of the outer wall of the tank body 1. The manhole 9 facilitates the inspection and maintenance of the inside of the tank body 1.

[0032] The following precautions should be taken during processing or use:

[0033] 1. All evaporation pipes must be degreased. The degreasing of the pipe cavity shall be carried out in accordance with the relevant provisions and evaluation rules of JB / T6896-2007 "Surface Cleanliness of Air Separation Equipment". The surface grease residue rate of oil-sensitive parts shall be <125mg / m2.

[0034] 2. Stainless steel surface pickling and passivation treatment;

[0035] 3. After all work is completed, the cavity is purged with dry nitrogen, then filled with 0.01 MPa of nitrogen for protection, and finally the port is sealed with a blind flange.

[0036] 4. Steam consumption is approximately ~5 tons / hour, steam pressure is 0.4 MPa(G), adjust according to actual operating conditions. 5. A safety discharge device is installed in the external piping system of this equipment. The heat exchange unit should be fixed with appropriate supports.

[0037] 6. All butt welds in the pipe section of this equipment must undergo 100% radiographic inspection, achieving Grade 1 qualification; fillet welds must undergo surface dye penetrant inspection, achieving Grade 1 qualification. Specific procedures shall be in accordance with the relevant provisions of NB / T47013-2015.

[0038] 7. The pipe opening orientation is shown in the top view; the lifting lugs are only for lifting empty tanks.

[0039] 8. Class A, B, and D weld joints must be fully penetrated, and the shape of fillet welds should have a smooth, rounded transition;

[0040] 9. This equipment shall be electrostatically grounded, with a grounding resistance of less than or equal to 10 ohms;

[0041] 10. To prevent oxygen ion corrosion of evaporation pipes, the oxygen ion content in the water used for the equipment should be less than 25 mg / L;

[0042] 11. Circulating water pump 53DN80 (IP54), flow rate 50Nm3 / h, head 12.5m, voltage 380V, power 3kw, first-class energy efficiency;

[0043] 12. This equipment shall be inspected periodically in accordance with the requirements of TSG 21-2016 "Safety Technical Supervision Regulations for Stationary Pressure Vessels". If the corrosion level reaches the specified value in advance during the use of the equipment, it shall be stopped immediately.

[0044] The above descriptions are merely some embodiments of this utility model. It should be noted that those skilled in the art can make other modifications and improvements without departing from the inventive concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A liquid oxygen vaporizer, characterized in that, include: The tank includes a liquid inlet, an air outlet, a heat exchange component, a circulating water component, a steam heating component, a temperature monitoring component, and a safety component. The top of the tank has a liquid inlet and an air outlet. The heat exchange component is located inside the tank and is connected to the liquid inlet and the air outlet. The steam heating component extends from the top of the tank to the bottom of the inner wall of the tank. The circulating water component is connected to the inner wall of the tank. The temperature monitoring component and the safety component are installed on the tank.

2. The liquid oxygen vaporizer according to claim 1, characterized in that, The heat exchange assembly includes: a first connecting pipe, a first circulation pipe, a second connecting pipe, a second circulation pipe, a first vaporization section, and a second vaporization section. One end of the first connecting pipe is connected to the liquid inlet, and the other end of the first connecting pipe is connected to the first circulation pipe. The bottom of the second connecting pipe is connected to the second circulation pipe. The first circulation pipe is located below the inner wall of the tank, and the second circulation pipe is located above the first circulation pipe. The bottom of the first vaporization section is connected to the first circulation pipe, and the top of the first vaporization section is connected to the second circulation pipe. The bottom of the second vaporization section is connected to the first circulation pipe, and the top of the second vaporization section is connected to the second circulation pipe.

3. A liquid oxygen vaporizer according to claim 2, characterized in that, The first vaporization section includes a plurality of vaporization pipes that are connected to the first circulation pipe and the second circulation pipe.

4. A liquid oxygen vaporizer according to claim 3, characterized in that, The structure of the first vaporization section is the same as that of the second vaporization section.

5. A liquid oxygen vaporizer according to claim 4, characterized in that, The circulating water assembly includes a circulating water inlet, a circulating water outlet, and a water pump. The circulating water inlet and the circulating water outlet are both located on the outer wall of the tank and are connected to the inside of the tank. The water pump is connected to the circulating water inlet and the circulating water outlet through a pipe. The circulating water outlet is located above the circulating water.

6. A liquid oxygen vaporizer according to claim 5, characterized in that, The steam heating assembly includes a steam port, a third connecting pipe, and a steam outlet. The steam port is located between the liquid inlet and the air outlet and is connected to an external air source. The top of the third connecting pipe is connected to the steam port, and the bottom of the third connecting pipe is connected to the steam outlet. There are at least two steam outlets, and the steam outlets are located below the first circulation pipe.

7. A liquid oxygen vaporizer according to claim 6, characterized in that, The temperature monitoring component includes a first temperature sensor, a second temperature sensor, and a thermometer. Both the first and second temperature sensors are disposed on the outer wall of the tank and communicate with the inside of the tank. The first temperature sensor is disposed at the bottom of the tank, the second temperature sensor is disposed at the top of the tank, and the thermometer is disposed on the outer wall of the tank and located between the first and second temperature sensors.

8. A liquid oxygen vaporizer according to claim 7, characterized in that, The safety components include: a vent pipe, an overflow port, a first level gauge, and a second level gauge. The vent pipe is provided on the top of the tank, and the overflow port is provided on the upper side wall of the tank. The first level gauge and the second level gauge are both located on the upper side wall of the tank, with the second level gauge located above the first level gauge.

9. A liquid oxygen vaporizer according to any one of claims 1-8, characterized in that, A manhole communicating with the outside is provided at the bottom of the tank, and a drain outlet and a sewage outlet communicating with the inside of the tank are provided at the bottom of the outer wall of the tank.

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