Carbon dioxide storage tank with condensation function

Abstract

The utility model provides a carbon dioxide storage tank with a condensation function, which relates to the field of carbon dioxide condensation and comprises a storage unit, a recovery unit and a condensation unit, the storage unit comprises a tank body, the tank body is used for storing liquid carbon dioxide, and the recovery unit is used for recovering carbon dioxide gas. The condensation unit condenses and liquefies the recovered carbon dioxide gas, under the action of the storage unit, the liquefied carbon dioxide can be stored, meanwhile, the carbon dioxide is conveyed into the tank body through the recovery unit, the back pressure of the recovery end of the recovery unit is reduced, the load of a recovery pump in the recovery unit is reduced, and the recovery efficiency is improved. The device is simple in structure and low in cost, the occupied area of the device is reduced, the system is simple and easy to operate, finally, under the action of the condensation unit, carbon dioxide gas liquefaction is promoted, cold insulation of the tank body is achieved, and the condensation unit and a cold insulation device on the outer surface of the tank body are combined into a whole, so that the complexity of the system is reduced.

Description

Technical Field

[0001] The utility model relates to the field of carbon dioxide condensation, in particular to a carbon dioxide storage tank with a condensation function. Background Art

[0002] The condenser is a component of the refrigeration system that is used to cool and convert gas or steam into a liquid state. It is a heat exchanger that removes heat from the gas or steam through contact with a condensing medium (such as cold water or coolant) to condense it into a liquid. The working principle of the condenser is based on the principles of heat conduction and heat exchange. When the hot gas or steam passes through the condenser, the condensing medium enters from the bottom of the condenser, contacts with the hot gas or steam, and absorbs heat, which causes the condensing medium to heat up, while the hot gas or steam cools and condenses into a liquid. The condenser is a heat exchange device commonly used in various medical, chemical, and food equipment, and plays an extremely important role in the heat exchange system. At the same time, the condenser also plays an important role in many fields, such as air conditioning systems, refrigeration equipment, chemical processes, petroleum refining, etc. Through the use of the condenser, hot gas or steam can be converted into liquid, energy transfer and recovery can be achieved, and the efficiency and performance of the system can be improved.

[0003] In the supercritical carbon dioxide anhydrous dyeing system, carbon dioxide needs to be recovered after dyeing is completed. When carbon dioxide is recovered, the remaining gaseous carbon dioxide in the dyeing kettle needs to be pumped into a storage tank through a compressor for storage. The carbon dioxide needs to be cooled and liquefied by a condenser before it can enter the storage tank. A condenser needs to be installed on the pipeline. In order to keep the medium in the storage tank liquid, the storage tank is generally equipped with a water-cooling jacket for cold preservation. The outside of the tank body is equipped with a cooling jacket, and the coil for recovering gas is not set inside the jacket, resulting in a large size of the entire equipment, a large footprint, high cost, and a complex system that is difficult to operate, which is not conducive to actual production and processing. Utility Model Content

[0004] The purpose of the utility model is to provide a carbon dioxide storage tank with a condensation function to alleviate the technical problems in the prior art such as large equipment size, complex structure, space occupation and high energy consumption, and to improve the condensation effect of the equipment and the collection efficiency after condensation is completed to meet the needs of actual production and processing.

[0005] The utility model provides a carbon dioxide storage tank with a condensing function, comprising:

[0006] Storage unit, recovery unit, condensation unit;

[0007] The storage unit comprises a tank body, and the tank body is used to store liquid carbon dioxide;

[0008] The recovery unit is used to recover carbon dioxide gas, and the recovery unit is distributed on the outer surface of the tank body;

[0009] The condensing unit condenses and liquefies the recovered carbon dioxide gas. The condensing unit is located on the outer surface of the tank body, and the recovery unit is wrapped inside the condensing unit.

[0010] In an alternative embodiment,

[0011] The tank body is a vertical pressure vessel.

[0012] In an alternative embodiment,

[0013] The recovery unit comprises a coil, the coil is located on the outer surface of the tank body, and the coil is spirally coiled around the outer side of the tank body. The two end ports of the coil are respectively fixedly connected and equipped with a coil input end and a coil output end.

[0014] In an alternative embodiment,

[0015] The condensing unit comprises a jacket, which is fixedly sleeved on the outer surface of the tank body, and the coil is wrapped by the jacket on its inner side, and the two end ports of the jacket are respectively fixedly connected and equipped with a condenser inlet and a condenser outlet.

[0016] In an alternative embodiment,

[0017] The condenser inlet is located at the lower end of the jacket, the condenser outlet is located at the upper end of the jacket, and the condenser outlet is relatively distributed with respect to the condenser inlet.

[0018] In an alternative embodiment,

[0019] The interior of the jacket is filled with a condensing medium, and the condensing medium flows from bottom to top in the interior of the jacket.

[0020] In an alternative embodiment,

[0021] The coil input end is located at the top edge of the jacket, and the coil input end extends from the jacket, and the coil output end passes through the bottom of the jacket;

[0022] The coil output end is in a fishhook shape, and one end of the coil output end away from the coil extends into the bottom of the tank body, and the tank body is fixedly connected with the coil.

[0023] In an alternative embodiment,

[0024] The proximal end section and the distal end section of the spiral coil are the inner wall and the outer wall of the coil respectively, and the outer wall and the inner wall of the coil do not contact the inner wall of the jacket.

[0025] In an alternative embodiment,

[0026] The outer surface of the coil is fixedly equipped with heat dissipation fins.

[0027] In an alternative embodiment,

[0028] The coiled pipe is an internally threaded pipe.

[0029] Compared with the prior art, the beneficial effects of the utility model are:

[0030] The utility model provides a carbon dioxide storage tank with a condensing function, which can store liquefied carbon dioxide under the action of a storage unit; at the same time, the carbon dioxide is transported to the inside of the tank body through a recovery unit, thereby reducing the back pressure at the recovery end of the recovery unit, reducing the load of a recovery pump in the recovery unit, reducing the footprint of the equipment, and having a low cost, and the system is simple and easy to operate; finally, under the action of the condensing unit, the carbon dioxide gas is liquefied and the cold preservation of the tank body is achieved, and the complexity of the system is reduced by combining the condensing unit with the cold preservation device on the outer surface of the tank body. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 A schematic diagram of the structure of a carbon dioxide storage tank with a condensing function provided in an embodiment of the utility model;

[0033] Figure 2 The embodiment of the utility model provides Figure 1 Enlarged view of point A in the middle.

[0034] Icon: 1-tank body; 2-jacket; 3-coil; 4-condenser inlet; 5-condenser outlet; 6-coil input end; 7-coil output end; 8-condensing medium; 9-coil outer wall; 10-coil inner wall. DETAILED DESCRIPTION

[0035] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

[0036] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0039] Example 1

[0040] See also Figure 1 — Figure 2 , this embodiment provides a carbon dioxide storage tank structure with a condensing function, including:

[0041] Storage unit, recovery unit, condensation unit;

[0042] The storage unit comprises a tank body 1, and the tank body 1 is used to store liquid carbon dioxide;

[0043] The recovery unit is used to recover carbon dioxide gas, and the recovery unit is distributed on the outer surface of the tank body 1;

[0044] The condensing unit condenses and liquefies the recovered carbon dioxide gas. The condensing unit is located on the outer surface of the tank body 1, and the recovery unit is wrapped inside the condensing unit.

[0045] The present embodiment provides a carbon dioxide storage tank with a condensing function, which can store liquefied carbon dioxide under the action of a storage unit; at the same time, the carbon dioxide is transported to the interior of the tank body 1 through a recovery unit, thereby reducing the back pressure at the recovery end of the recovery unit, reducing the load of the recovery pump in the recovery unit, reducing the footprint of the equipment, and having a low cost, and the system is simple and easy to operate; finally, under the action of the condensing unit, the carbon dioxide gas is liquefied and the tank body 1 is kept cold, and the complexity of the system is reduced by combining the condensing unit with the cold-keeping device on the outer surface of the tank body 1.

[0046] On the basis of the above-mentioned embodiment, the tank body 1 of the carbon dioxide storage tank with condensation function provided in this embodiment is a vertical pressure vessel;

[0047] Tank 1 provides uniform pressure distribution by eliminating stress points in horizontal and square tanks. This pressure distribution is greater than that of horizontal tanks, which helps them accommodate larger quantities of product. For liquids, Tank 1 can place the bottom of the cylinder directly on a solid, flat surface, providing better stress distribution.

[0048] The recovery unit includes a coil 3, which is located on the outer surface of the tank body 1 and is spirally wound around the outer side of the tank body 1. The two end ports of the coil 3 are respectively fixedly connected and equipped with a coil input end 6 and a coil output end 7.

[0049] The coil 3 in the recovery unit collects carbon dioxide, wherein the carbon dioxide enters from the coil input end 6 and flows along the inside of the coil 3 from the top end of the jacket 2 to the bottom end of the jacket 2 .

[0050] The coil output end 7 is in a fishhook shape, and one end of the coil output end 7 away from the coil 3 extends into the bottom of the tank body 1, and the tank body 1 and the coil 3 are fixedly connected;

[0051] The coil output end 7 is in the shape of a fishhook, which enables the coil output end 7 to enter the interior of the tank 1 .

[0052] The proximal end section and the distal end section of the spiral coil 3 are the inner wall 10 and the outer wall 9 of the coil respectively, and the outer wall 9 and the inner wall 10 of the coil do not contact the inner wall of the jacket 2;

[0053] The carbon dioxide inside the coil 3 is liquefied by the condensing unit, and the heat of the carbon dioxide is absorbed, thereby achieving the purpose of cooling the carbon dioxide and liquefying it.

[0054] The condensing unit comprises a jacket 2, which is fixedly mounted on the outer surface of the tank body 1, and the coil 3 is wrapped inside by the jacket 2, and the two end ports of the jacket 2 are respectively fixedly connected and equipped with a condenser inlet 4 and a condenser outlet 5;

[0055] The condensing medium 8 injected into the jacket 2 has a cooling effect on the tank body 1. The purpose of the cold-keeping tank body 1 is to keep the condensed liquid carbon dioxide in a low temperature state to prevent it from evaporating and heating up again. The outside of the jacket 2 is provided with insulation material, which can effectively reduce the conduction and radiation of heat. The condensed liquid carbon dioxide will be introduced into the cold-keeping tank body 1. The cold-keeping tank body 1 will reduce the conduction and radiation of heat as much as possible to keep the liquid carbon dioxide in a low temperature state, which helps to prevent the liquid carbon dioxide from evaporating and heating up again, and ensure the durability and efficiency of the condensation effect.

[0056] The condenser inlet 4 is located at the lower end of the jacket 2, and the condenser outlet 5 is located at the upper end of the jacket 2, and the condenser outlet 5 is relatively distributed with the condenser inlet 4;

[0057] After entering the condenser inlet 4, the condensing medium 8 in the condensing unit contacts the inside of the jacket 2 and the outer surface of the coil 3. At this time, the condensing medium 8 liquefies the carbon dioxide inside the coil 3 through countercurrent heat exchange.

[0058] The interior of the jacket 2 is filled with a condensing medium 8, and the condensing medium 8 flows from bottom to top in the interior of the jacket 2;

[0059] The condensing medium 8 flows from bottom to top inside the jacket 2. Under the action of heat conduction, the condensing medium 8 absorbs heat and gradually heats up. At the same time, the carbon dioxide in the jacket 2 cools and condenses into liquid. Such a countercurrent heat exchange process helps to reduce the temperature of the carbon dioxide that finally enters the cold-keeping tank body 1; avoids insufficient condensation and improves the performance and stability of the condensing unit; gravity helps the carbon dioxide liquid flow downward, which can reduce the dependence on the recovery pump, thereby reducing energy consumption and maintenance costs.

[0060] Working principle:

[0061] The staff checks that the condenser is in good working condition and ensures that it can operate normally, and then opens the supply valve of the condensing medium 8 to allow the condensing medium 8 to flow through the condenser, and then opens the supply valve of the gaseous carbon dioxide and starts the carbon dioxide recovery pump to allow the gaseous carbon dioxide to enter the condenser. The supply valve of the condensing medium 8 is opened first to ensure that the carbon dioxide does not enter the interior of the tank 1 without being condensed.

[0062] Gaseous carbon dioxide enters the interior of the coil 3 from the coil input end 6, and cools the carbon dioxide inside the coil 3 through the jacket 2 and the condensing medium 8 in the condensing unit. The carbon dioxide inside the coil 3 transfers heat to the outer surface of the coil 3, and then transfers heat through the contact between the outer surface of the coil 3 and the condensing medium 8. Finally, the heat of the carbon dioxide is transferred to the condensing medium 8. The above process is achieved by heat conduction and heat convection. With the injection of the condensing medium 8, the condensing medium 8 cools the carbon dioxide from the lower end of the jacket 2 to the upper end of the jacket 2. The position of the condensing medium 8 entering and exiting the jacket 2 ensures the uniformity of the cooling of the coil 3, effectively avoiding insufficient cooling of the carbon dioxide due to heat conduction, and local overheating or insufficient condensation of the condensing unit due to uneven distribution of the condensing medium 8.

[0063] At the same time, the jacket 2 wrapped around the outer surface of the tank body 1 plays a role in keeping the tank body 1 cold, and keeps the condensed liquid carbon dioxide at a low temperature.

[0064] The carbon dioxide gas is condensed by the condensing medium 8 and becomes liquid carbon dioxide. The liquid carbon dioxide enters the interior of the tank body 1 through the coil output end 7 and is stored inside the tank body 1 .

[0065] Example 2

[0066] See also Figure 1 , recorded in this embodiment is another implementation of the coil 3:

[0067] The outer surface of the coil 3 is fixedly equipped with heat dissipation fins to improve the cooling efficiency of the carbon dioxide.

[0068] In this embodiment:

[0069] By assembling annular fins on the outer surface of the coil 3, the heat dissipation area of ​​the outer surface of the coil 3 is increased, and the heat exchange efficiency is improved. The material of the fins is aluminum alloy or copper alloy, so that the rapid cooling of carbon dioxide is achieved. During the flow of carbon dioxide, heat will be transferred to the condensing medium 8 through heat conduction, convection and radiation. The fins on the outer surface of the coil 3 can greatly increase the area of ​​the outer surface of the coil 3, improve the heat exchange efficiency, and thus improve the cooling efficiency of carbon dioxide.

[0070] Example 3

[0071] See also Figure 1 , recorded in this embodiment is another implementation of the coil 3:

[0072] The coil 3 is an internally threaded tube.

[0073] In this embodiment:

[0074] The heat transfer efficiency is improved by increasing the inner surface area of ​​the coil 3, and the material of the internal threaded tube is stainless steel. The change in its internal structure not only increases the contact area between the carbon dioxide and the inner surface of the coil 3, but also prolongs the cooling time of the carbon dioxide in the coil 3, so that the carbon dioxide is fully cooled. At the same time, the use of the internal threaded tube improves the fluid dynamics of the carbon dioxide inside the coil 3, reduces the heat transfer thermal resistance, and thus improves the cooling efficiency of the carbon dioxide.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A carbon dioxide storage tank with condensation function, characterized in that: include: Storage unit, recovery unit, condensation unit; The storage unit comprises a tank body (1), and the tank body (1) is used to store liquid carbon dioxide; The recovery unit is used to recover carbon dioxide gas, and the recovery unit is distributed on the outer surface of the tank body (1); The condensing unit condenses and liquefies the recovered carbon dioxide gas. The condensing unit is located on the outer surface of the tank body (1), and the recovery unit is wrapped inside the condensing unit.

2. A carbon dioxide storage tank with condensation function according to claim 1, characterized in that: The tank body (1) is a vertical pressure vessel.

3. A carbon dioxide storage tank with condensation function according to claim 2, characterized in that: The recovery unit comprises a coil (3), the coil (3) being located on the outer surface of the tank body (1), and the coil (3) being spirally wound around the outer side of the tank body (1), and the two end ports of the coil (3) being respectively fixedly connected and equipped with a coil input end (6) and a coil output end (7).

4. A carbon dioxide storage tank with condensation function according to claim 3, characterized in that: The condensing unit comprises a jacket (2), the jacket (2) being fixedly mounted on the outer surface of the tank body (1), and the coil (3) being wrapped by the jacket (2) on its inner side, and the two end ports of the jacket (2) being fixedly connected and equipped with a condenser inlet (4) and a condenser outlet (5) respectively.

5. A carbon dioxide storage tank with condensation function according to claim 4, characterized in that: The condenser inlet (4) is located at the lower end of the jacket (2), the condenser outlet (5) is located at the upper end of the jacket (2), and the condenser outlet (5) and the condenser inlet (4) are arranged relative to each other.

6. A carbon dioxide storage tank with condensation function according to claim 4, characterized in that: The interior of the jacket (2) is filled with a condensing medium (8), and the condensing medium (8) flows from bottom to top inside the jacket (2).

7. A carbon dioxide storage tank with condensation function according to claim 4, characterized in that: The coil input end (6) is located at the top edge of the jacket (2), and the coil input end (6) extends from the jacket (2), and the coil output end (7) passes through the bottom of the jacket (2); The coil output end (7) is in the shape of a fishhook, and one end of the coil output end (7) away from the coil (3) extends into the bottom of the tank body (1), and the tank body (1) and the coil (3) are fixedly connected.

8. The carbon dioxide storage tank with condensation function according to claim 4, characterized in that: The proximal end section and the distal end section of the spiral coil (3) are the inner wall (10) and the outer wall (9) of the coil respectively, and the outer wall (9) and the inner wall (10) of the coil do not contact the inner wall of the jacket (2).

9. The carbon dioxide storage tank with condensation function according to claim 3, characterized in that: The outer surface of the coil (3) is fixedly equipped with heat dissipation fins.

10. The carbon dioxide storage tank with condensation function according to claim 3, characterized in that: The coiled pipe (3) is an internally threaded pipe.

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