Small high-purity carbon dioxide rectification device

Abstract

The utility model relates to the technical field of carbon dioxide purification, and discloses a small high-purity carbon dioxide rectification device which comprises a collecting cavity, the upper portion of the collecting cavity is connected with a reboiling cavity, a spiral disc is arranged in the reboiling cavity, the upper portion of the reboiling cavity is connected with a liquid feeding assembly through a flow guide pipe, and the liquid feeding assembly comprises a pressure relief cavity and a vortex cavity. A low-temperature high-pressure carbon dioxide stock solution enters the vortex cavity through the pressure relief cavity to form a vortex-shaped steam-water mixture, the upper portion of the liquid feeding assembly is connected with a condensation assembly through a flow guide pipe, and a light boiling substance absorption assembly is arranged below the condensation assembly. According to the small-sized high-purity carbon dioxide rectification device, through the arrangement of the liquid feeding assembly, the device can realize rectification of carbon dioxide without external heating, meanwhile, more impurities can be separated at normal temperature and normal pressure, rectification is realized through the cooperation of a flow guide pipe and a reboiling cavity, and the production cost of the device is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon dioxide purification, in particular to a small-sized high-purity carbon dioxide distillation device. Background Art

[0002] A distillation tower (packed tower) is a tower-type gas-liquid contact device for distillation. By utilizing the different volatilities of the components in the mixture, that is, the different vapor pressures of the components at the same temperature, the light components (low-boiling substances) in the liquid phase are transferred to the gas phase, while the heavy components (high-boiling substances) in the gas phase are transferred to the liquid phase, thereby achieving the purpose of separation.

[0003] At present, the distillation and purification of high-purity carbon dioxide requires a distillation tower body, a reboiler, a reflux cooler, and supporting refrigeration liquefaction, reboiler pressurization and other devices. There are many supporting public works before and after. The overall cost is high, and it can only be used after 10,000 tons or more. If you need to produce 1,000 tons of high-purity carbon dioxide annually, the tower is tall and occupies a large area. Utility Model Content

[0004] (I) Technical problems solved: In view of the shortcomings of the prior art, the present invention provides a small-scale high-purity carbon dioxide distillation device, which has the function of atmospheric pressure distillation, requires fewer supporting facilities, and does not require external pressurization. It solves the problem that the overall facilities of general carbon dioxide distillation devices are relatively large, the cost is high, and the operation requires relatively high costs.

[0005] (II) Technical solution: In order to achieve the above-mentioned purpose of having atmospheric distillation, requiring fewer supporting facilities and no need for external pressurization, the utility model provides the following technical solution: a small-scale high-purity carbon dioxide distillation device, including a collecting chamber, the collecting chamber is connected to a reboiling chamber at the top, a spiral disk is arranged in the reboiling chamber, the reboiling chamber is connected to a liquid delivery component at the top through a guide tube, the liquid delivery component includes a pressure relief chamber and a vortex chamber, low-temperature and high-pressure carbon dioxide raw liquid enters the vortex chamber through the pressure relief chamber to form a vortex-shaped soda-water mixture, the liquid delivery component is connected to a condensation component at the top through a guide tube, and a light-boiling substance absorption component is arranged at the bottom of the condensation component.

[0006] Preferably, the vortex chamber includes a connecting cylinder connected to the guide pipe, a vortex groove is arranged above the connecting cylinder, a guide vane is arranged in the vortex groove, and the guide vane has oblique guide grooves equidistantly arranged in the circumferential direction of the guide vane.

[0007] Preferably, the pressure relief chamber includes a central cylinder, a liquid inlet baffle is arranged around the periphery of the central cylinder, the liquid inlet baffle and the central cylinder mutually form a pressure relief groove, an oblique liquid inlet hole is arranged on the circumferential wall surface of the liquid inlet baffle, a liquid inlet chamber is arranged around the liquid inlet baffle, and a liquid inlet channel is arranged on the liquid inlet chamber.

[0008] Preferably, the collecting chamber extends upward to the inside of the reboiling chamber, the spiral disk is spirally arranged on the outer wall of the collecting chamber inside the reboiling chamber, a liquid inlet hole is arranged on the wall surface of the collecting chamber inside the reboiling chamber, and a reboiled material guide channel is arranged on the top of the collecting chamber.

[0009] Preferably, a reboiled material discharge channel is provided on the flow guide pipe connecting the reboiler chamber and the liquid delivery assembly.

[0010] Preferably, a liquid outlet channel is provided on the collecting chamber.

[0011] Preferably, a multi-layer activated carbon absorption plate is provided in the light-boiling material absorption component.

[0012] (III) Beneficial effects: Compared with the prior art, the utility model provides a small-scale high-purity carbon dioxide distillation device, which has the following beneficial effects:

[0013] 1. A small-scale high-purity carbon dioxide distillation device, which passes liquid carbon dioxide into a pressure relief component, and forms a preliminary vortex while releasing the pressure of the liquid carbon dioxide through the liquid inlet channel and the oblique guide groove in the pressure relief component, and further forms a vortex fluid through the vortex chamber, so that the impurities with lower density in the liquid carbon dioxide can move to the periphery of the vortex fluid more quickly, and because of the pressure release and heat release, the angular velocity of the center of the vortex fluid is the largest, and energy is released to the periphery through friction with the peripheral fluid, so that the fluid energy in the center of the vortex fluid is rapidly reduced to form carbon dioxide with higher purity, and the peripheral fluid is heated to the boiling point due to heat absorption and becomes a light boiling product, which is discharged upward, and the arrangement of the liquid delivery component enables the device to realize the distillation of carbon dioxide without external heating, and at the same time, more impurities can be separated at normal temperature and pressure, and distillation is realized by the guide tube in combination with the reboiling chamber, thereby reducing the production cost of the device and making up for the problem of high production cost of small-scale carbon dioxide distillation device.

[0014] 2. This small-scale high-purity carbon dioxide distillation device, through the use of a reboiling chamber in conjunction with a spiral disk, enables the device to further remove impurities from the purified carbon dioxide liquid. At the same time, through the light-boiling substance absorption component arranged under the condenser, the discharged light-boiling substances can be further absorbed, thereby reducing the degree of light-boiling substance pollution discharged into the air and reducing environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of a small-scale high-purity carbon dioxide distillation device in the utility model;

[0016] Figure 2 This is a cross-sectional view of a small-scale high-purity carbon dioxide distillation device in the utility model;

[0017] Figure 3 This is a front view of a small-scale high-purity carbon dioxide distillation device in the utility model;

[0018] Figure 4 It is a schematic diagram of the three-dimensional structure of a vortex chamber of a small-scale high-purity carbon dioxide distillation device in the utility model;

[0019] Figure 5 The utility model is a schematic diagram of the three-dimensional structure of a pressure release chamber of a small-scale high-purity carbon dioxide distillation device.

[0020] In the figure: 1-collecting chamber, 2-reboiling chamber, 3-guide pipe, 4-liquid delivery assembly, 5-condensation assembly, 6-light boiling material absorption assembly, 7-spiral disk, 8-reboiling material discharge channel, 11-reboiling material guide channel, 12-liquid outlet channel, 41-vortex chamber, 42-pressure release chamber, 411-connecting cylinder, 412-guide plate, 413-oblique guide groove, 421-center cylinder, 422-liquid inlet baffle, 423-oblique liquid inlet hole, 424-liquid inlet chamber, 425-liquid inlet channel. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-5 A small-scale high-purity carbon dioxide distillation device comprises a collecting chamber 1, wherein the collecting chamber 1 is connected to a reboiling chamber 2 at the top, the collecting chamber 1 extends upward to the inside of the reboiling chamber 2, the spiral disk 7 is spirally arranged on the outer wall of the collecting chamber 1 inside the reboiling chamber 2, a liquid inlet hole is arranged on the wall surface of the collecting chamber 1 inside the reboiling chamber 2, and a reboiled material guide channel 11 is arranged on the top of the collecting chamber 1.

[0023] By extending the collection chamber 1 upwardly to the inside of the reboiling chamber 2, the flow of liquid can be better controlled and the separation effect can be improved. The arrangement of the spiral disc 7 can increase the fluidity of the liquid inside the reboiling cavity 2 , further improving the separation effect. The arrangement of the liquid inlet holes allows the liquid to enter the collection chamber 1 more evenly, thereby making the separation effect more stable. The arrangement of the reboiling material flow channel 11 can better control the flow of the reboiling material, making the operation of the entire device more convenient and safe.

[0024] A spiral disk 7 is arranged in the reboiling chamber 2, and the reboiling chamber 2 is connected to the liquid delivery component 4 through the guide pipe 3 above. The liquid delivery component 4 includes a pressure relief chamber 42 and a vortex chamber 41. The vortex chamber 41 includes a connecting cylinder 411 connected to the guide pipe 3, a vortex groove is arranged above the connecting cylinder 411, and a guide plate 412 is arranged in the vortex groove. The guide plate 412 has oblique guide grooves 413 equidistantly arranged in the circumferential direction.

[0025] The flow guide tube 3 is connected to the liquid delivery component 4, so that the liquid can enter the reboiling chamber 2 more evenly. The liquid delivery component 4 includes a pressure relief chamber 42 and a vortex chamber 41. The pressure relief chamber 42 can release the pressure generated when the liquid enters the vortex chamber 41, so that the liquid can enter the vortex chamber 41 more stably. The structure can make the liquid produce a stable vortex effect after entering the vortex chamber 41, increase the fluidity of the liquid inside the reboiling chamber 2, and further improve the separation effect.

[0026] The pressure relief chamber 42 includes a central cylinder 421, and a liquid inlet baffle 422 is arranged on the periphery of the central cylinder 421. The liquid inlet baffle 422 and the central cylinder 421 mutually surround a pressure relief groove, so that the liquid releases pressure in the pressure relief groove before entering the vortex chamber 41, so that the liquid can enter the vortex chamber 41 more stably. The circumferential wall surface of the liquid inlet baffle 422 is provided with an oblique liquid inlet hole 423. This structure can make the liquid enter the pressure relief groove more evenly, so that the operation of the entire device is more stable. A liquid inlet chamber 424 is arranged on the periphery of the liquid inlet baffle 422, and a liquid inlet chamber 424 is arranged on the periphery of the liquid inlet baffle 422. A liquid inlet channel 425 is arranged on the liquid inlet chamber 424. This structure can make it easier for the liquid to enter the pressure relief chamber 42 from the liquid inlet chamber 424.

[0027] The low-temperature and high-pressure carbon dioxide stock liquid enters the vortex chamber 41 through the pressure relief chamber 42 to form a vortex-shaped soda-water mixture. When the liquid enters the vortex chamber 41 through the pressure relief chamber 42, due to the effect of the oblique liquid inlet hole 423 and the liquid inlet baffle 422 provided in the pressure relief chamber 42, the liquid will first release the pressure and evenly distribute it before entering the vortex chamber 41. After entering the vortex chamber 41, the liquid will form a rotating flow under the joint action of the central cylinder 421 and the liquid inlet baffle 422, producing a stable vortex effect. The formation of this vortex-shaped soda-water mixture can further improve the separation effect of the carbon dioxide stock liquid, making the separation of carbon dioxide and other substances more thorough. At the same time, this structure can also make the operation of the entire device more convenient and safe, and is suitable for a variety of fields, such as gas separation, purification, etc.

[0028] The top of the liquid delivery component 4 is connected to the condensation component 5 through the guide pipe 3, and the bottom of the condensation component 5 is provided with a light-boiling material absorption component 6. The guide pipe 3 connecting the reboiling chamber 2 and the liquid delivery component 4 is provided with a reboiling material discharge channel 8. The collecting chamber 1 is provided with a liquid outlet channel 12. The light-boiling material absorption component 6 is provided with a multi-layer activated carbon absorption plate.

[0029] The top of the liquid delivery component 4 is connected to the condensation component 5 through the guide pipe 3. This structure allows the liquid delivered from the liquid delivery component 4 to enter the condensation component 5 more stably, thereby better controlling the flow of the liquid. A light-boiling-substance absorption component 6 is arranged below the condensation component 5. This structure allows the gas condensed from the condensation component 5 to enter the light-boiling-substance absorption component 6 more conveniently, thereby carrying out the next step of processing.

[0030] A reboiled material discharge channel 8 is provided on the flow guide pipe 3 connecting the reboiler chamber 2 and the liquid delivery assembly 4. This structure allows the reboiled material to be discharged more conveniently, thereby making the operation of the entire device safer and more convenient. A liquid outlet channel 12 is provided on the collection chamber 1. This structure allows the liquid to be discharged from the collection chamber 1 more conveniently, thereby better controlling the flow of the liquid.

[0031] The light-boiling-material absorption component 6 is provided with multiple layers of activated carbon absorption plates. This structure can make the absorption effect of the light-boiling-material absorption component 6 more stable and efficient, thereby better processing the gas condensed from the condensation component 5 .

[0032] Working Principle: Low temperature and high pressure liquid carbon dioxide releases heat when the pressure is released. When the liquid carbon dioxide enters the pressure release chamber 42, its pressure decreases, the movement speed of the molecules increases, the average distance between the molecules also increases, the internal energy of the liquid will be converted into the kinetic energy and thermal energy of the gas, and then through the vortex groove, the liquid carbon dioxide forms a vortex fluid. The light-boiling substances in the liquid carbon dioxide that releases energy move to the periphery of the vortex due to their low density, and absorb the released heat and transform into a gaseous state. Since the rotation angular velocities in different radii of the vortex fluid are different, the rotation angular velocity of the vortex fluid located in the center is the largest, and the friction with the vortex fluid at its periphery further reduces its energy and heat, and the temperature of the light-boiling substances with low density at the periphery is further increased, and the conversion is completely converted into a gaseous state, and moves to the condensation component 5 through the guide pipe 3, while the high-purity carbon dioxide in the center of the vortex flows to the reboiling chamber 2 through the guide pipe 3. By introducing air into the reboiling chamber 2, the vortex carbon dioxide with a low temperature absorbs energy and its temperature increases, so that its residual impurities are further converted into light-boiling substances and discharged from the light-boiling substance discharge channel above, and the final carbon dioxide is collected by the collection chamber 1 below. Moreover, the boiling point difference between light boiling substances and carbon dioxide under normal pressure is the largest, so impurities can be removed completely and the product quality is better.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0034] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A small-scale high-purity carbon dioxide distillation device, comprising a collecting chamber (1), characterized in that: The collecting chamber (1) is connected to the reboiling chamber (2) at the top, a spiral disk (7) is arranged in the reboiling chamber (2), the reboiling chamber (2) is connected to the liquid delivery component (4) at the top through a flow guide pipe (3), the liquid delivery component (4) comprises a pressure relief chamber (42) and a vortex chamber (41), low-temperature and high-pressure carbon dioxide raw liquid enters the vortex chamber (41) through the pressure relief chamber (42) to form a vortex-shaped soda-water mixture, the liquid delivery component (4) is connected to the condensation component (5) at the top through the flow guide pipe (3), and a light-boiling substance absorption component (6) is arranged below the condensation component (5).

2. A small-scale high-purity carbon dioxide distillation device according to claim 1, characterized in that: The vortex chamber (41) comprises a connecting cylinder (411) connected to the guide pipe (3), a vortex groove is arranged above the connecting cylinder (411), a guide plate (412) is arranged in the vortex groove, and the guide plate (412) is provided with oblique guide grooves (413) equidistantly arranged in the circumferential direction.

3. A small-scale high-purity carbon dioxide distillation device according to claim 1, characterized in that: The pressure relief chamber (42) comprises a central cylinder (421), a liquid inlet baffle (422) is arranged on the periphery of the central cylinder (421), the liquid inlet baffle (422) and the central cylinder (421) mutually enclose a pressure relief groove, an oblique liquid inlet hole (423) is arranged on the circumferential wall surface of the liquid inlet baffle (422), a liquid inlet chamber (424) is arranged on the periphery of the liquid inlet baffle (422), and a liquid inlet channel (425) is arranged on the liquid inlet chamber (424).

4. A small-scale high-purity carbon dioxide distillation device according to claim 1, characterized in that: The collecting chamber (1) extends upward to the interior of the reboiling chamber (2); the spiral disk (7) is spirally arranged on the outer wall of the collecting chamber (1) inside the reboiling chamber (2); a liquid inlet hole is arranged on the wall surface of the collecting chamber (1) inside the reboiling chamber (2); and a reboiled material guide channel (11) is arranged on the top of the collecting chamber (1).

5. A small-scale high-purity carbon dioxide distillation device according to claim 1, characterized in that: A reboiled material discharge channel (8) is provided on the flow guide pipe (3) connecting the reboiler chamber (2) and the liquid delivery assembly (4).

6. A small-scale high-purity carbon dioxide distillation device according to claim 1, characterized in that: The collection chamber (1) is provided with a liquid outlet channel (12).

7. A small-scale high-purity carbon dioxide distillation device according to claim 1, characterized in that: A plurality of layers of activated carbon absorption plates are arranged in the light-boiling material absorption component (6).

Images