A kind of air separation residual liquid evaporation device

Abstract

The utility model provides a kind of air separation residual liquid evaporation device, including base, evaporation cylinder, steam communication pipe and low-temperature residual liquid communication pipe, the evaporation cylinder lower end is vertically arranged on the base upper end, the outlet end of the steam communication pipe is vertically arranged in the evaporation cylinder lower end inside, the low-temperature residual liquid communication pipe is transversely arranged in the evaporation cylinder side and the outlet end of the low-temperature residual liquid communication pipe is located above the outlet end of the steam communication pipe, the evaporation cylinder upper end side is also provided with horizontal support. The utility model is simple in structure, is used with air separation cold box, can make low-temperature residual liquid flow into the device and then be evaporated by high-temperature steam quickly and then be safely discharged into atmosphere, so it can avoid damage to personnel, equipment and surrounding environment.

Description

Technical Field

[0001] This utility model relates to the field of air separation equipment, and in particular to an air separation residual liquid evaporation device. Background Technology

[0002] Air separation units cool air to a liquefied state through deep freezing, and then separate them using distillation columns by utilizing the boiling characteristics of different gases at different temperatures. The cold box is the core component of the air separation unit, where air undergoes distillation separation and liquefaction. The lowest temperature of the cryogenic liquid medium (liquid oxygen, liquid nitrogen, liquid argon, etc.) inside a conventional air separation cold box can reach -196℃. During shutdown maintenance or when products fail to meet standards and need to be discharged, directly releasing the cryogenic liquid onto the ground will cause the following problems: Low-temperature injury: Low-temperature liquids will boil and vaporize rapidly at room temperature, and the temperature is extremely low. If handled improperly, it may cause frostbite to personnel and equipment.

[0003] Environmental impact: The discharge of cryogenic liquids may cause a drop in the temperature of the surrounding environment, affecting the ambient temperature, and in particular, may cause adverse effects such as freezing and cracking of the ground and cold box foundation.

[0004] Safety regulations: Cryogenic liquids should be handled and stored in accordance with relevant safety regulations. Direct discharge onto the ground may pose safety risks.

[0005] Equipment damage: Because the cold box shell is made of carbon steel, low-temperature liquids may cause the cold box panels to freeze and crack.

[0006] Safety risks: The liquid oxygen regeneration process creates an oxygen-rich environment, increasing the risk of fire and explosion. Liquid nitrogen and liquid argon, on the other hand, may pose a risk of asphyxiation. Utility Model Content

[0007] To address the problem that residual liquid cannot be directly discharged in existing technologies, this invention provides an air separation residual liquid evaporation device that enables the safe and rapid evaporation and safe discharge of low-temperature residual liquid.

[0008] This utility model provides an air separation residual liquid evaporation device, including a base, an evaporation cylinder, a steam connecting pipe and a low-temperature residual liquid connecting pipe. The lower end of the evaporation cylinder is vertically placed on the upper end of the base. The outlet end of the steam connecting pipe is vertically placed inside the lower end of the evaporation cylinder. The low-temperature residual liquid connecting pipe is horizontally placed on one side of the evaporation cylinder and the outlet end of the low-temperature residual liquid connecting pipe is located above the outlet end of the steam connecting pipe. A horizontal support is also provided on one side of the upper end of the evaporation cylinder.

[0009] As a further improvement of this utility model, the outlet end of the steam connecting pipe is an hourglass structure.

[0010] As a further improvement of this utility model, the diameter of the low-temperature residual liquid connecting pipe gradually decreases from the inlet end to the outlet end.

[0011] As a further improvement of this utility model, the evaporation cylinder includes a bottom conical section, a lower expansion section and a middle straight section connected in sequence. The outlet end of the steam connecting pipe and the outlet end of the low temperature residual liquid connecting pipe are both located in the bottom conical section. The diameter of the lower expansion section gradually increases from the bottom conical section to the middle straight section. One end of the horizontal support is connected to the upper part of the middle straight section.

[0012] As a further improvement of this utility model, the evaporation cylinder also includes an upper curved cylinder section located at the upper end of the intermediate straight cylinder section.

[0013] As a further improvement of this utility model, the air separation residual liquid evaporation device also includes an aluminum flange, a steel wire protective net and a steel flange. The aluminum flange is welded to the upper end face of the upper curved section. The steel flange is connected to the aluminum flange by multiple bolts. The steel wire protective net is sandwiched between the steel flange and the aluminum flange.

[0014] As a further improvement of this utility model, an annular connecting rib is provided between the inner wall of the bottom conical section and the outer wall of the steam connecting pipe.

[0015] As a further improvement of this utility model, the inlet end of the low-temperature residual liquid connecting pipe is provided with a connecting flange that communicates with the residual liquid discharge pipe.

[0016] As a further improvement of this utility model, the steam connecting pipe has an L-shaped structure and is laid at the lower end of the ground.

[0017] As a further improvement of this utility model, the evaporation cylinder is an aluminum alloy cylinder.

[0018] The beneficial effects of this utility model are: This utility model has a simple structure and is used in conjunction with an air separation cold box. It can allow low-temperature residual liquid to flow into the device and then be rapidly evaporated by high-temperature steam before being safely discharged into the atmosphere, thus avoiding damage to personnel, equipment and the surrounding environment. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the overall structure of an air separation residual liquid evaporation device according to this utility model; Figure 2 This is a schematic diagram of the top structure of an air separation residual liquid evaporation device according to the present invention; Figure 3 yes Figure 1 Sectional view at point AA; Figure 4This is a reference diagram showing the usage status of an air separation residual liquid evaporation device according to this utility model; Figure 5 yes Figure 4 Enlarged view of point B in the middle.

[0020] Reference numerals: 1-Base; 2-Evaporator cylinder; 21-Bottom conical section; 22-Lower expansion section; 23-Middle straight section; 24-Upper curved section; 25-Aluminum flange; 26-Steel flange; 27-Steel wire mesh; 3-Steam connecting pipe; 31-Outlet end of steam connecting pipe; 4-Low-temperature residual liquid connecting pipe; 41-Outlet end of low-temperature residual liquid connecting pipe; 42-Connecting flange; 5-Horizontal support; 6-Annular connecting stiffener; 7-Residual liquid discharge pipe; 8-Air separation cold box. Detailed Implementation

[0021] In the description of this utility model, it should be understood that if there are descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientation or positional relationship, the orientation description may be based on the orientation or positional relationship shown in the accompanying drawings. This is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0022] In the description of this utility model, if there is a description of quantity, "several" means one or more, "more than" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the number itself, while "above," "below," "within," etc. are understood to include the number itself. If there is a description of "first" or "second," it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0023] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0024] like Figures 1 to 5As shown, this utility model discloses an air separation residual liquid evaporation device, including a base 1, an evaporation cylinder 2, a steam connecting pipe 3, and a low-temperature residual liquid connecting pipe 4. The lower end of the evaporation cylinder 2 is vertically placed on the upper end of the base 1, which is laid on the ground and provides the main gravity support. The steam connecting pipe 3 is laid on the lower end of the ground and its outlet end is vertically placed inside the lower end of the evaporation cylinder 2, so that the high-temperature steam generated is blown upward from the lower end of the evaporation cylinder 2. The low-temperature residual liquid connecting pipe 4 is horizontally placed on one side of the evaporation cylinder 2, and its outlet end 41 is located above the outlet end 31 of the steam connecting pipe. The low-temperature residual liquid can flow into the evaporation cylinder 2 through the low-temperature residual liquid connecting pipe 4 and flow down to the outlet end 31 of the steam connecting pipe, which can ensure that the low-temperature residual liquid and the high-temperature steam have sufficient contact and heat exchange, so that the low-temperature residual liquid is evaporated and discharged. A horizontal support 5 is also provided on one side of the upper end of the evaporation cylinder 2 for horizontal support to fix the evaporation cylinder 2 to one side of the air separation cold box 8.

[0025] In this invention, the outlet end 31 of the steam connecting pipe is an hourglass structure. When high-temperature steam passes through the pipe section of the hourglass structure, a "narrow tube effect" is generated, which increases the steam flow rate and thus increases the heat exchange efficiency between the steam and the low-temperature residual liquid.

[0026] In this invention, the diameter of the low-temperature residual liquid connecting pipe 4 gradually decreases from the inlet end to the outlet end, which increases the liquid flow rate and produces a jetting effect, enabling the low-temperature residual liquid to be accelerated into the outlet end 31 of the steam connecting pipe, further increasing the heat exchange efficiency and improving the evaporation and discharge efficiency.

[0027] In this invention, the evaporator cylinder 2 includes a bottom conical section 21, a lower expansion section 22, and a middle straight section 23 connected in sequence. The outlet end 31 of the steam connecting pipe and the outlet end 41 of the low-temperature residual liquid connecting pipe are both located inside the bottom conical section 21. The diameter of the lower expansion section 22 gradually increases from the bottom conical section 21 to the middle straight section 23. The lower expansion section 22 can reduce the steam velocity, increase the mixing and heat exchange time between the high-temperature steam and the low-temperature liquid, thereby increasing the heat exchange vaporization efficiency and reducing the noise generated by fluid flow to a certain extent. One end of the horizontal support 5 is connected to the upper part of the middle straight section 23 for easy fixing and to ensure the horizontal stability of the steam cylinder.

[0028] In this invention, the evaporator cylinder 2 also includes an upper curved cylinder section 24 located at the upper end of the middle straight cylinder section 23, which can adjust the gas emission direction so that the gas emission direction is away from the operating platform, thus avoiding impact on pedestrians.

[0029] In this invention, the air separation residual liquid evaporation device further includes an aluminum flange 25, a steel wire mesh 27, and a steel flange 26. The aluminum flange 25 is welded to the upper end face of the upper curved section 24. The steel flange 26 is connected to the aluminum flange 25 by multiple bolts. The steel wire mesh 27 is sandwiched between the steel flange 26 and the aluminum flange 25. This design prevents birds and other objects from falling into the device.

[0030] In this invention, an annular connecting rib 6 is provided between the inner wall of the bottom conical section 21 and the outer wall of the steam connecting pipe 3. This enhances the structural stability of the entire device.

[0031] In this invention, the inlet end of the low-temperature residual liquid connecting pipe 4 is provided with a connecting flange 42 that communicates with the residual liquid discharge pipe 7.

[0032] In this invention, the steam connecting pipe 3 has an L-shaped structure and is laid at the lower end of the ground to reduce the installation height of the device, so that the outlet end of the low-temperature residual liquid is lower than the height of the cold box residual liquid discharge pipe 7, thereby ensuring that the low-temperature residual liquid can flow smoothly into the air separation residual liquid evaporation device for evaporation and discharge.

[0033] In this invention, the evaporation cylinder 2 is an aluminum alloy cylinder. The aluminum alloy cylinder is not only resistant to low temperatures but also lightweight, which makes it easy to arrange the base 1. Thus, the base 1 does not need to be driven into deep piles and can be directly set on a hardened and flat ground.

[0034] The overall height of the air separation residue evaporator should ensure that the exhaust gases can be safely and effectively released into the atmosphere, minimizing the impact on the surrounding environment and personnel. The diameter of the evaporator is determined based on the amount of residue discharged from the air separation unit.

[0035] This utility model has a simple structure and is used in conjunction with the air separation cold box 8. It allows low-temperature residual liquid to flow into the device and then be rapidly evaporated by high-temperature steam before being safely discharged into the atmosphere, thus avoiding damage to personnel, equipment and the surrounding environment.

[0036] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. An air separation residue evaporation device, characterized in that: The device includes a base, an evaporator cylinder, a steam connecting pipe, and a low-temperature residual liquid connecting pipe. The lower end of the evaporator cylinder is vertically placed on the upper end of the base. The outlet end of the steam connecting pipe is vertically placed inside the lower end of the evaporator cylinder. The low-temperature residual liquid connecting pipe is horizontally placed on one side of the evaporator cylinder, and the outlet end of the low-temperature residual liquid connecting pipe is located above the outlet end of the steam connecting pipe. A horizontal support is also provided on one side of the upper end of the evaporator cylinder.

2. The air separation residue evaporation device according to claim 1, characterized in that: The outlet end of the steam connecting pipe has an hourglass structure.

3. The air separation residue evaporation device according to claim 2, characterized in that: The diameter of the low-temperature residual liquid connecting pipe gradually decreases from the inlet end to the outlet end.

4. The air separation residue evaporation device according to claim 3, characterized in that: The evaporation cylinder includes a bottom conical section, a lower expansion section, and a middle straight section connected in sequence. The outlet end of the steam connecting pipe and the outlet end of the low-temperature residual liquid connecting pipe are both located inside the bottom conical section. The diameter of the lower expansion section gradually increases from the bottom conical section to the middle straight section. One end of the horizontal support is connected to the upper part of the middle straight section.

5. The air separation residue evaporation device according to claim 4, characterized in that: The evaporator cylinder also includes an upper curved section located at the upper end of the intermediate straight section.

6. The air separation residue evaporation apparatus according to claim 5, characterized in that: The air separation residual liquid evaporation device also includes an aluminum flange, a steel wire protective net, and a steel flange. The aluminum flange is welded to the upper end face of the upper curved section. The steel flange is connected to the aluminum flange by multiple bolts. The steel wire protective net is sandwiched between the steel flange and the aluminum flange.

7. The air separation residue evaporation apparatus according to claim 6, characterized in that: An annular connecting rib is provided between the inner wall of the bottom conical section and the outer wall of the steam connecting pipe.

8. The air separation residue evaporation apparatus according to claim 1, characterized in that: The inlet end of the low-temperature residual liquid connecting pipe is provided with a connecting flange that connects to the residual liquid discharge pipe.

9. The air separation residue evaporation apparatus according to claim 1, characterized in that: The steam connecting pipe has an L-shaped structure and is laid at the lower end of the ground.

10. The air separation residue evaporation apparatus according to claim 1, characterized in that: The evaporation cylinder is made of aluminum alloy.

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