A distillation device for preparing high-purity carbon dioxide

Abstract

The present invention provides a distillation device for preparing high-purity carbon dioxide, which belongs to the technical field of carbon dioxide preparation. A distillation device for preparing high-purity carbon dioxide in the present application comprises: the distillation device comprises: a distillation tower, a desulfurization mechanism, a storage tank, a first delivery pipe and a second delivery pipe. The separation assembly comprises a fixed plate, a support plate, a separation plate, and a steam pipe. The fixed plate is arranged on the inner surface of the distillation tower, the upper surface of the fixed plate is provided with a support plate, the top of the support plate is provided with a separation plate, and the steam pipe is arranged at the bottom of the distillation tower. The distillation device for preparing high-purity carbon dioxide in the present application can control the distillation temperature and multiple distillations to obtain carbon dioxide with higher concentration, thereby solving the problem of low purity of the distilled carbon dioxide.

Description

Technical Field

[0001] The invention belongs to the technical field of carbon dioxide preparation, and in particular relates to a distillation device for preparing high-purity carbon dioxide. Background Art

[0002] Carbon dioxide is a carbon oxide. Distillation is a separation process that uses the different volatilities of the components in a mixture to separate them. Distillation equipment is widely used in the treatment of carbon dioxide gas.

[0003] The distillation device currently used is composed of a material tank, an evaporator, a distillation tower, a conveying pipe, a heat exchanger and a storage tank. The material is conveyed to the inside of the material tank through the feed port, and then conveyed to the inside of the evaporator through the conveying pipe. The evaporator conveys the steam to the inside of the distillation tower through the conveying pipe, and then the steam is filtered through the distillation tower. The steam inside the distillation tower is cooled by the conveying pipe through the heat exchanger and then conveyed to the storage tank.

[0004] A Chinese patent with publication number CN115089989A discloses "a distillation and purification device for preparing high-purity carbon dioxide". The device includes a box, a distillation mechanism and a transmission pipe. The distillation mechanism is arranged at intervals on one side of the box, one end of the transmission pipe is connected to the distillation mechanism, and the other end is connected to the box. It also includes an adsorption mechanism, which is movably installed in the box. The adsorption mechanism is used to adsorb impurities in carbon dioxide gas. After long-term preparation, the present invention pulls the sealing plate upward to open the through-port, then takes out the adsorption plate, and puts in a new adsorption plate, loosens the sealing plate to seal the through-port, so as to facilitate the replacement of the adsorption plate and improve the adsorption effect. The spring elongation is increased so that the extrusion plate presses the adsorption plate, so as to stabilize the adsorption plate and prevent the gas from flowing out of the gap.

[0005] However, there are still some problems with the above distillation device: when the existing distillation device is working, it can usually only distill the carbon dioxide once, and a single distillation cannot completely distill the carbon dioxide, so that the concentration of the distilled carbon dioxide is low, thereby resulting in a low purity of the distilled carbon dioxide. Summary of the invention

[0006] The present invention provides a distillation device for preparing high-purity carbon dioxide. By arranging a temperature control component and a separation component, the distillation temperature can be controlled and multiple distillations can be performed to obtain carbon dioxide with higher concentration, thereby solving the problem of low purity of the distilled carbon dioxide.

[0007] The present invention provides a distillation device for preparing high-purity carbon dioxide, comprising: a distillation tower, a desulfurization mechanism, a storage tank, a first delivery pipe and a second delivery pipe;

[0008] The distillation tower includes a temperature control component and a separation component, the temperature control component includes a temperature controller, a first temperature control plate, a first wire box, a second temperature control plate, and a second wire box, the temperature controller is arranged on one side of the outer surface of the distillation tower, the first temperature control plate is arranged on the bottom of the inner side of the distillation tower, one end of the first wire box is fixed on one side of the first temperature control plate, and the other end is fixed on one side of the temperature controller, the second temperature control plate is arranged on the top of the inner side of the distillation tower, one end of the second wire box is fixed on one side of the second temperature control plate, and the other end is fixed on the other side of the temperature controller;

[0009] The separation assembly includes a fixed plate, a separation component, and a steam pipe. The fixed plate is arranged on the inner surface of the distillation tower. The upper surface of the fixed plate is provided with several layers of separation components arranged in a vertical direction. Each layer of the separation component includes a support plate and a separation plate. The separation plate is arranged at the top of the support plate, and the steam pipe is arranged at the bottom of the distillation tower.

[0010] Optionally, the desulfurization mechanism includes a desulfurization layer arranged inside, the desulfurization layer is divided into three layers, each layer is a honeycomb structure composed of a number of regular hexagonal single rooms, with the room openings facing one side and arranged symmetrically back to back.

[0011] Optionally, one end of the first delivery pipe is connected to one end of the desulfurization mechanism, and the other end is connected to the top of the distillation tower; one end of the second delivery pipe is connected to the other end of the desulfurization mechanism, and the other end is connected to the top of the storage tank.

[0012] Optionally, a through hole is provided inside the fixing plate for allowing steam to pass through and move upward.

[0013] Optionally, a separation groove is provided inside the separation plate, and the separation groove is a vertical cylindrical groove body that can be used to fill fillers.

[0014] Optionally, a first supporting base is further provided at the bottom of the distillation tower.

[0015] Optionally, a control panel is also provided on the outer surface of the distillation tower.

[0016] Optionally, a reflux pipe is also provided at the bottom of the distillation tower.

[0017] Optionally, a second support base is provided at the bottom of the storage tank; and a liquid level display is provided on the outer surface of the storage tank.

[0018] Optionally, an output tube is provided at the bottom end of the liquid level display.

[0019] Due to the adoption of the above technical solution, the beneficial effects of the present invention include at least one of the following:

[0020] 1. The distillation device for preparing high-purity carbon dioxide provided by the present invention controls the stability of the temperature inside the distillation tower by setting a temperature control component, thereby ensuring the purity of the carbon dioxide distillation;

[0021] 2. The distillation device for preparing high-purity carbon dioxide provided by the present invention is provided with a separation component, and steam is transported to the interior of a distillation tower through a steam pipe. The steam moves upward through the through hole, and then the low-boiling substances in the steam are separated through the separation groove inside the separation plate. The separated low-boiling substances then fall back to the bottom of the distillation tower through the separation groove, and flow back to the heater through the steam pipe to evaporate again. The low-boiling substances are separated multiple times through the separation groove, so that the distillation obtains carbon dioxide with a higher concentration, thereby making the distilled carbon dioxide with a higher purity;

[0022] 3. The distillation device for preparing high-purity carbon dioxide provided by the present invention improves the bottom stability of the distillation tower and the storage tank by providing the first support base and the second support base;

[0023] 4. The distillation device for preparing high-purity carbon dioxide provided by the present invention desulfurizes steam by setting a desulfurization mechanism, thereby improving the purity of carbon dioxide. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0025] Figure 1 This is a schematic diagram of the structure of a distillation device for preparing high-purity carbon dioxide according to an embodiment of the present application;

[0026] Figure 2 Schematic diagram of the cross-sectional structure of a distillation device for preparing high-purity carbon dioxide according to an embodiment of the present application;

[0027] Figure 3 This is a schematic diagram of the internal structure of a distillation device for preparing high-purity carbon dioxide according to an embodiment of the present application;

[0028] Figure 4 for Figure 2 The enlarged structural diagram at A in the middle;

[0029] Figure 5 for Figure 2 Enlarged structural diagram at B in the middle.

[0030] List of parts and reference numerals:

[0031] 1-distillation tower, 2-control panel, 3-first support seat, 4-reflux pipe, 5-temperature controller, 6-first wire box, 7-first temperature control plate, 8-second wire box, 9-second temperature control plate, 10-fixed plate, 11-through hole, 12-support plate, 13-separation plate, 14-separation tank, 15-first delivery pipe, 16-desulfurization mechanism, 17-desulfurization layer, 18-second delivery pipe, 19-storage tank, 20-liquid level display, 21-second support seat, 22-output pipe, 23-steam pipe. DETAILED DESCRIPTION

[0032] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in an exemplary manner in conjunction with the accompanying drawings.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0034] In addition, in the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0037] Example 1: A distillation device for preparing high-purity carbon dioxide

[0038] like Figure 1-Figure 5 As shown, an embodiment of the present application discloses a distillation device for preparing high-purity carbon dioxide, including: a distillation tower 1, a desulfurization mechanism 16, a storage tank 19, a first delivery pipe 15 and a second delivery pipe 18.

[0039] Specifically, the tower body of the distillation tower 1 is made of 304 or 316 stainless steel, which has good pressure resistance and corrosion resistance. The interior of the distillation tower 1 is made of surface-treated carbon steel, which can withstand internal pressure.

[0040] The distillation tower 1 includes a temperature control component and a separation component. The temperature control component includes a temperature controller 5, a first temperature control plate 7, a first wire box 6, a second temperature control plate 9, and a second wire box 8. The temperature controller 5 is arranged on one side of the outer surface of the distillation tower 1, the first temperature control plate 7 is arranged at the bottom of the inner side of the distillation tower 1, one end of the first wire box 6 is fixed on one side of the first temperature control plate 7, and the other end is fixed on one side of the temperature controller 5, the second temperature control plate 9 is arranged at the top of the inner side of the distillation tower 1, one end of the second wire box 8 is fixed on one side of the second temperature control plate 9, and the other end is fixed on the other side of the temperature controller 5.

[0041] The separation assembly includes a fixed plate 10, a separation member, and a steam pipe 23. The fixed plate 10 is arranged on the inner surface of the distillation tower 1. The upper surface of the fixed plate 10 is provided with several layers of separation members arranged in the vertical direction. Each layer of separation members includes several support plates 12 and separation plates 13. The separation plates 13 are arranged on the top of several support plates 12. The support plates 12 in each layer of separation members are arranged at equal distances, and the support plates 12 in the separation members of two adjacent layers are arranged in a staggered manner, that is, the position of each layer of support plates is different from that of the previous layer. Such a structure can prevent steam agglomeration, does not block the moving direction of steam, and makes steam separation more thorough. The steam pipe 23 is arranged at the bottom of the distillation tower 1.

[0042] By setting up temperature control components and separation components, the distillation temperature can be controlled and multiple distillations can be performed to obtain carbon dioxide with a higher concentration, thereby solving the problem of low purity of the distilled carbon dioxide.

[0043] As an embodiment, the desulfurization mechanism 16 includes a desulfurization layer 17 disposed inside.

[0044] Specifically, the desulfurization layer 17 is used to desulfurize steam. There are three layers in total. Each layer is a honeycomb structure composed of a number of regular hexagonal single rooms, with the room openings facing one side and arranged symmetrically back to back. The material of the desulfurization layer 17 includes γ-alumina or titanium oxide, activated carbon and molecular sieve, wherein the specific surface area of ​​the activated carbon is greater than 1000m 2 / g, the molecular sieve is aluminosilicate molecular sieve, and the activated carbon and molecular sieve are loaded into γ-alumina or titanium oxide at a mass percentage of 10-20%. The desulfurization layer 17 has excellent adsorption performance and selectivity, can adsorb trace amounts of hydrogen sulfide, sulfur dioxide and other sulfides in carbon dioxide, but does not adsorb carbon dioxide molecules, and has a good desulfurization effect.

[0045] As an embodiment, one end of the first delivery pipe 15 is connected to one end of the desulfurization mechanism 16, and the other end is connected to the top of the distillation tower 1; one end of the second delivery pipe 18 is connected to the other end of the desulfurization mechanism 16, and the other end is connected to the top of the storage tank 19.

[0046] Specifically, the other end of the first delivery pipe 15 is fixed to the top of the distillation tower 1, and the desulfurization mechanism 16 is fixed to one end of the first delivery pipe 15, so that the first delivery pipe 15 delivers the steam filtered inside the distillation tower 1 to the desulfurization mechanism 16. One end of the second delivery pipe 18 is connected to the other end of the desulfurization mechanism 16, and the other end is fixed to the top of the storage tank 19, so as to deliver the desulfurized steam to the storage tank 19.

[0047] As an implementation manner, a through hole 11 is disposed inside the fixing plate 10 .

[0048] Specifically, the number of through holes 11 is determined according to the actual distillation volume, and the through holes 11 are used to allow the steam to move upward.

[0049] As an implementation manner, a separation groove 14 is provided inside the separation plate 13 .

[0050] Specifically, the separation tank 14 is a vertical cylindrical tank body, which is convenient for loading fillers. The tank body of the separation tank 14 is made of stainless steel, which is pressure-resistant and corrosion-resistant. The thickness of the separation tank 14 is determined according to actual conditions to ensure sufficient mechanical strength. The interior of the separation tank 14 is filled with carbon deposit microsphere fillers, with a diameter of 3-5mm and a VOID ratio of 0.5-0.7. The microspheres are made of activated carbon with a specific surface area of ​​>1000m 2The separation tank 14 can make full use of the adsorption function of the activated carbon filler to separate the low-boiling substances in the steam, and the separated low-boiling substances fall back to the bottom of the distillation tower 1 through the separation tank 14.

[0051] As an implementation mode, a first support base 3 is further provided at the bottom of the distillation tower 1 .

[0052] Specifically, the first support base 3 is welded to the bottom of the distillation tower 1 to improve the stability of the distillation tower 1 .

[0053] As an embodiment, a control panel 2 is also provided on the outer surface of the distillation tower 1 .

[0054] Specifically, the control panel 2 can be used to set the temperature inside the distillation tower 1. When the temperature inside the distillation tower 1 deviates from the set temperature, the control panel can also automatically control the first temperature control plate 7 and the second temperature control plate 9 to keep the internal temperature of the distillation tower 1 constant within the set temperature range.

[0055] As an embodiment, a reflux pipe 4 is further provided at the bottom of the distillation tower 1 .

[0056] Specifically, the reflux pipe 4 is fixed to the bottom of the distillation tower 1 through a fixing member, and is used for the reflux pipe 4 to transport steam to the inside of the distillation tower 1 .

[0057] As an embodiment, a second support seat 21 is disposed at the bottom of the storage tank 19. A liquid level indicator 20 is disposed on the outer surface of the storage tank 19.

[0058] Specifically, the second support base 21 is welded to the bottom of the storage tank 19 to improve the stability of the storage tank 19. The liquid level display 20 is used to monitor the storage volume of the storage tank 19.

[0059] As an implementation manner, an output tube 22 is disposed at the bottom end of the liquid level display 20 .

[0060] Specifically, the output pipe 22 is fixed to the inside of the bottom end of the storage tank 19 through a fixing member, so that the output pipe 22 can discharge the high-purity carbon dioxide inside the storage tank 19.

[0061] The operation process of the distillation device of the present application is: the first temperature control plate 7 is fixed at the bottom end of the distillation tower 1, and the second temperature control plate 9 is fixed at the top of the distillation tower 1, and then the first temperature control plate 7 is controlled by the temperature controller 5 outside the distillation tower 1 through the first wire box 6, and then the second temperature control plate 9 is controlled by the second wire box 8, so that the first temperature control plate 7 and the second temperature control plate 9 control the inside of the distillation tower 1 at a stable temperature. Then, the steam is transported to the interior of the distillation tower 1 through the steam pipe 23, the steam moves upward through the through hole 11, and then the low-boiling substances in the steam are separated through the separation groove 14 inside the separation plate 13, and then the separated low-boiling substances fall back to the bottom of the distillation tower 1 through the separation groove 14, and flow back to the heater through the steam pipe 23 to evaporate again. The low-boiling substances are separated multiple times through the separation groove 14, so that distillation obtains carbon dioxide with a higher concentration, and then the distilled steam is transported to the interior of the desulfurization mechanism 16 through the first delivery pipe 15. After the steam is desulfurized by the desulfurization layer 17, it is transported to the storage tank 19 through the second delivery pipe 18 for storage.

[0062] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A distillation device for preparing high-purity carbon dioxide, characterized in that: The distillation device comprises: a distillation tower, a desulfurization mechanism, a storage tank, a first delivery pipe and a second delivery pipe; The distillation tower includes a temperature control component and a separation component, the temperature control component includes a temperature controller, a first temperature control plate, a first wire box, a second temperature control plate, and a second wire box, the temperature controller is arranged on one side of the outer surface of the distillation tower, the first temperature control plate is arranged on the bottom of the inner side of the distillation tower, one end of the first wire box is fixed on one side of the first temperature control plate, and the other end is fixed on one side of the temperature controller, the second temperature control plate is arranged on the top of the inner side of the distillation tower, one end of the second wire box is fixed on one side of the second temperature control plate, and the other end is fixed on the other side of the temperature controller; The separation assembly comprises a fixed plate, a separation member, and a steam pipe, wherein the fixed plate is arranged on the inner surface of the distillation tower, and the upper surface of the fixed plate is provided with a plurality of layers of separation members arranged in a vertical direction, wherein each layer of the separation members comprises a support plate and a separation plate, and the separation plate is arranged on the top of the support plate, and the support plates in each layer of the separation members are arranged at equal distances, and the support plates in the separation members of two adjacent layers are arranged in a staggered manner, and the steam pipe is arranged at the bottom of the distillation tower; The desulfurization mechanism includes a desulfurization layer arranged inside, and the desulfurization layer is divided into three layers, each layer is a honeycomb structure composed of a number of regular hexagonal single rooms, the room openings facing one side, and arranged symmetrically back to back; the material of the desulfurization layer includes γ-alumina, activated carbon, molecular sieve or includes titanium oxide, activated carbon, molecular sieve; the specific surface area of ​​the activated carbon is greater than 1000m 2 / g, the molecular sieve is an aluminosilicate molecular sieve, and the activated carbon and the molecular sieve are loaded into γ-alumina or titanium oxide at a mass percentage of 10-20%; The fixing plate is provided with through holes inside for allowing steam to pass through and move upward; The separation plate is provided with a separation tank inside, which is a vertical cylindrical tank body for filling fillers; the separation tank is filled with carbon deposit microsphere fillers, the microsphere diameter is 3-5mm, the VOID ratio is 0.5-0.7, the microsphere is made of activated carbon material, and the specific surface area is>1000m 2 / g; A reflux pipe is also provided at the bottom of the distillation tower.

2. A distillation device for preparing high-purity carbon dioxide according to claim 1, characterized in that: One end of the first delivery pipe is connected to one end of the desulfurization mechanism, and the other end is connected to the top of the distillation tower; one end of the second delivery pipe is connected to the other end of the desulfurization mechanism, and the other end is connected to the top of the storage tank.

3. A distillation device for preparing high-purity carbon dioxide according to claim 1, characterized in that: A first supporting base is also provided at the bottom of the distillation tower.

4. A distillation device for preparing high-purity carbon dioxide according to claim 3, characterized in that: The outer surface of the distillation tower is also provided with a control panel.

5. A distillation device for preparing high-purity carbon dioxide according to claim 1, characterized in that: A second support seat is arranged at the bottom of the storage tank; and a liquid level display is arranged on the outer surface of the storage tank.

6. A distillation device for preparing high-purity carbon dioxide according to claim 5, characterized in that: An output pipe is arranged at the bottom end of the liquid level display.

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