Energy-saving air separation molecular sieve system

Abstract

The utility model provides an energy-saving air separation molecular sieve system, and relates to the technical field of air separation devices.The energy-saving air separation molecular sieve system comprises a plurality of molecular sieves, an air inlet section, an air outlet section, a regeneration gas inlet section and a regeneration gas outlet section, the air inlet section and the regeneration gas outlet section are connected with the first pipe fitting through a second pipe fitting so as to be communicated with the same ends of the molecular sieves, and the air outlet section and the regeneration gas inlet section are connected with the first pipe fitting through a third pipe fitting so as to be communicated with the same ends of the molecular sieves; the molecular sieve device is simple in structure and reasonable in design, and the molecular sieves are arranged and communicated with one another, so that the molecular sieves can run in parallel, the resistance is greatly reduced, the energy consumption is effectively reduced, and the energy-saving effect is realized.

Description

Technical Field

[0001] The present application relates to the technical field of air separation devices, and in particular to an energy-saving air separation molecular sieve system. Background Art

[0002] An air separation unit is a device used to separate and purify different gases in the air. During operation, the main energy-consuming equipment is the air compressor, whose exhaust needs to reach a certain pressure. In addition to ensuring the normal operation of the distillation process, this pressure also needs to overcome the resistance of various equipment and pipelines. The resistance of the molecular sieve part is relatively high. The industry has been committed to continuously reducing the resistance of the molecular sieve. The resistance of the radial flow molecular sieve can reach about 3KPa, but its application in large air separation units is not ideal. At present, horizontal molecular sieves are still the main ones.

[0003] Therefore, research on energy saving and consumption reduction of traditional horizontal molecular sieves is particularly important. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide an energy-saving air separation molecular sieve system, which can solve the technical problems of large operating resistance and high operating energy consumption of the air separation molecular sieve.

[0005] An embodiment of the present application provides an energy-saving air separation molecular sieve system, comprising a plurality of molecular sieves, an air inlet section, an air outlet section, a regeneration gas inlet section and a regeneration gas outlet section, wherein the plurality of molecular sieves are interconnected via a first pipe fitting to achieve parallel operation, the air inlet section and the regeneration gas outlet section are connected to the first pipe fitting via a second pipe fitting to be connected to the same end of the plurality of molecular sieves, and the air outlet section and the regeneration gas inlet section are connected to the first pipe fitting via a third pipe fitting to be connected to the same end of the plurality of molecular sieves.

[0006] Furthermore, the first pipe member is also provided with a plurality of butterfly valves and a plurality of stop valves, and the plurality of butterfly valves and the plurality of stop valves are respectively arranged in one-to-one correspondence with the plurality of molecular sieves.

[0007] Furthermore, bypass pipes for installing the stop valves are respectively provided at positions on the first pipe member corresponding to the plurality of butterfly valves.

[0008] Furthermore, the number of the molecular sieves is set to three.

[0009] Furthermore, check valves are respectively provided at the positions where the air outlet section and the regeneration gas outlet section are connected to the plurality of molecular sieves.

[0010] Furthermore, the first tube members are provided in two groups, the two groups of the first tube members are respectively provided at two ends of a plurality of the molecular sieves, and each group of the first tube members is composed of a plurality of pipes.

[0011] Beneficial effects of the utility model:

[0012] The energy-saving air separation molecular sieve system provided by the utility model comprises a plurality of molecular sieves, an air inlet section, an air outlet section, a regeneration gas inlet section and a regeneration gas outlet section. The plurality of molecular sieves are interconnected through a first pipe fitting to realize parallel operation. The air inlet section and the regeneration gas outlet section are connected to the first pipe fitting through a second pipe fitting to be connected to the same end of the plurality of molecular sieves. The air outlet section and the regeneration gas inlet section are connected to the first pipe fitting through a third pipe fitting to be connected to the same end of the plurality of molecular sieves. The utility model has a simple structure and a reasonable design. By arranging a plurality of molecular sieves and interconnecting the plurality of molecular sieves, the plurality of molecular sieves can be operated in parallel, thereby greatly reducing resistance, effectively reducing energy consumption and realizing energy-saving effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the structure of the molecular sieve of the present utility model.

[0016] The reference numerals are:

[0017] Molecular sieve 1, air inlet section 2, air outlet section 3, regeneration gas inlet section 4, regeneration gas outlet section 5, first pipe fitting 6, butterfly valve 61, stop valve 62, bypass pipe 63, second pipe fitting 7, third pipe fitting 8, check valve 9. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0020] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0021] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0022] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0023] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0024] See also Figure 1-Figure 2As shown, the energy-saving air separation molecular sieve 1 system described in this embodiment includes a plurality of molecular sieves 1, an air inlet section 2, an air outlet section 3, a regeneration gas inlet section 4 and a regeneration gas outlet section 5. The plurality of molecular sieves 1 are interconnected through a first pipe fitting 6 to realize parallel operation. The air inlet section 2 and the regeneration gas outlet section 5 are connected to the first pipe fitting 6 through a second pipe fitting 7 to be connected to the same end of the plurality of molecular sieves 1. The air outlet section 3 and the regeneration gas inlet section 4 are connected to the first pipe fitting 6 through a third pipe fitting 8 to be connected to the same end of the plurality of molecular sieves 1.

[0025] The present embodiment has a simple structure and a reasonable design. By setting a plurality of molecular sieves 1 and interconnecting the molecular sieves 1, they can be operated in parallel, thereby greatly reducing resistance, effectively reducing energy consumption, and achieving energy-saving effects. At the same time, redundant equipment is provided for the molecular sieve 1 system to improve the reliability of the device. If a molecular sieve 1 is found to be faulty, the faulty molecular sieve 1 can be isolated for maintenance without causing the system to be shut down for a long time, thereby improving practicality.

[0026] In some embodiments, a plurality of butterfly valves 61 and a plurality of stop valves 62 are further provided on the first pipe member 6 , and the plurality of butterfly valves 61 and the plurality of stop valves 62 are respectively provided corresponding to the plurality of molecular sieves 1 .

[0027] In this embodiment, the butterfly valve 61 and the stop valve 62 are used to facilitate independent on / off control of a single molecular sieve 1 and the air inlet section 2, the air outlet section 3, the regeneration gas inlet section 4 and the regeneration gas outlet section 5. The structure is simple and the regulation is precise and convenient.

[0028] Specifically, bypass pipes 63 for installing the stop valves 62 are respectively provided at positions on the first pipe member 6 corresponding to the plurality of butterfly valves 61 .

[0029] In this embodiment, the bypass pipe 63 is provided to facilitate the installation of the stop valve 62, and the structure is simple and the on-off regulation is convenient.

[0030] In some embodiments, the number of the molecular sieves 1 is set to three.

[0031] In this embodiment, such an arrangement enables the two molecular sieves 1 to be in parallel, reducing resistance and improving operational reliability. If one of them needs to be restarted or overhauled, it can be replaced with a spare one, so that it can be isolated for overhaul without stopping the vehicle, which is highly practical.

[0032] In some embodiments, check valves 9 are respectively provided at the positions where the air outlet section 3 and the regeneration gas outlet section 5 are connected to the molecular sieves 1 .

[0033] In this embodiment, a check valve 9 is added to the stop valve 62 to disconnect the molecular sieve 1 in time when a failure occurs, so as to avoid affecting the change of the gas source pressure, thereby ensuring the stable operation of the entire air separation system.

[0034] In some embodiments, the first tube member 6 is provided in two groups, the two groups of the first tube member 6 are respectively provided at two ends of a plurality of the molecular sieves 1, and each group of the first tube member 6 is composed of a plurality of pipes.

[0035] In this embodiment, it is specifically shown that the first pipe member 6 is composed of multiple pipes, and the first pipe member 6 is provided with two groups so as to respectively connect the two ends of a plurality of molecular sieves 1. The structure design is simple, and it is convenient to install valves and perform joint regulation.

[0036] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An energy-saving air separation molecular sieve system, characterized in that: It includes a plurality of molecular sieves, an air inlet section, an air outlet section, a regeneration gas inlet section and a regeneration gas outlet section. The plurality of molecular sieves are interconnected through a first pipe fitting to realize parallel operation. The air inlet section and the regeneration gas outlet section are connected to the first pipe fitting through a second pipe fitting to be connected to the same end of the plurality of molecular sieves. The air outlet section and the regeneration gas inlet section are connected to the first pipe fitting through a third pipe fitting to be connected to the same end of the plurality of molecular sieves.

2. The energy-saving air separation molecular sieve system according to claim 1 is characterized in that: The first pipe member is also provided with a plurality of butterfly valves and a plurality of stop valves, and the plurality of butterfly valves and the plurality of stop valves are respectively arranged corresponding to the plurality of molecular sieves.

3. The energy-saving air separation molecular sieve system according to claim 2 is characterized in that: Positions on the first pipe member corresponding to the plurality of butterfly valves are respectively provided with bypass pipes for installing the stop valves.

4. The energy-saving air separation molecular sieve system according to claim 1, characterized in that: The number of the molecular sieves is set to three.

5. The energy-saving air separation molecular sieve system according to claim 1 is characterized in that: The positions where the air outlet section and the regeneration gas outlet section are connected to the plurality of molecular sieves are respectively provided with check valves.

6. The energy-saving air separation molecular sieve system according to claim 1, characterized in that: The first tube members are provided in two groups, the two groups of the first tube members are respectively arranged at the two ends of a plurality of the molecular sieves, and each group of the first tube members is composed of a plurality of pipelines.

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