Symmetrical mixed flow oxygen-nitrogen separation production machine

Abstract

The utility model discloses a kind of symmetry mixed flow oxygen-nitrogen separation preparation machines, including supporting mechanism, supporting mechanism is respectively fixed with adsorption tower one and adsorption tower two, the zeolite molecular sieve is uniformly arranged in adsorption tower one and adsorption tower two inside, the top of adsorption tower one and the top of adsorption tower two are respectively fixed with connecting pipe one and connecting pipe two by flange, and connecting pipe one end is fixed with solenoid valve seven, connecting pipe two end is fixed with solenoid valve one, the bottom outer wall of adsorption tower one and the bottom outer wall of adsorption tower two are respectively fixed with connecting pipe four and connecting pipe three by flange, connecting pipe four end is fixed with pressure regulating valve one. The utility model uses double adsorption tower symmetry design, the timing switching of solenoid valve group is accurately controlled by controller, make two towers alternately carry out pressurized adsorption oxygen production and decompression desorption nitrogen discharge cycle, when one tower is in adsorption separation stage, another tower synchronously carries out regeneration, ensure the continuous, stable output of oxygen and nitrogen.

Description

Technical Field

[0001] This utility model relates to the field of oxygen and nitrogen separation and production technology, and in particular to a symmetrical mixed flow oxygen and nitrogen separation and production machine. Background Technology

[0002] Air separation technology is one of the fundamental processes in modern industry. Its core objective is to efficiently and economically produce high-purity oxygen, nitrogen, and other gaseous products from ambient air. With the continuous growth of market demand, traditional air separation methods mainly include cryogenic distillation and membrane separation. Although these air separation methods can produce extremely high-purity gases, they require huge equipment investment, have long start-up times, and high energy consumption. Membrane separation is simple to operate and easy to use, but the purity of the product gas is relatively low, and the cost of membrane materials is high, which limits its application scope. In contrast, pressure swing adsorption (PSA) based on the selective adsorption of zeolite molecular sieves has become the preferred technology for small and medium-sized gas applications due to its simple process, quick start-up and shutdown, relatively low energy consumption, and high degree of automation. Its basic principle is to take advantage of the fact that the adsorption capacity of zeolite molecular sieves for nitrogen is much greater than that for oxygen. Under pressure, nitrogen is adsorbed to obtain oxygen-enriched gas. Then, by depressurizing, the adsorbed nitrogen is desorbed, realizing the regeneration of the molecular sieve and obtaining nitrogen-enriched gas. However, traditional single adsorption towers have an inherent intermittent defect, that is, the adsorption tower cannot produce product gas at the same time during desorption and regeneration, resulting in discontinuous gas supply and limiting production efficiency. Therefore, developing an oxygen-nitrogen separation device with a reasonable structural design that can continuously and stably output high-purity gas is of great significance for improving the technical level and economic benefits of air separation. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a symmetrical mixed flow oxygen and nitrogen separation and production machine.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A symmetrical mixed flow oxygen and nitrogen separation and production machine includes a support mechanism, on which adsorption tower one and adsorption tower two are fixed respectively. Zeolite molecular sieves are installed inside both adsorption tower one and adsorption tower two. Connecting pipe one and connecting pipe two are respectively fixed to the top of adsorption tower one and adsorption tower two via flanges. A solenoid valve seven is fixed to one end of connecting pipe one, and a solenoid valve one is fixed to one end of connecting pipe two. Connecting pipe four and connecting pipe three are respectively fixed to the bottom outer walls of adsorption tower one and adsorption tower two via flanges. A pressure regulating valve one is fixed to one end of connecting pipe four, and a pressure regulating valve is fixed to one end of connecting pipe three. A three-way pipe one is fixed to one end of both pressure regulating valve one and pressure regulating valve three. Solenoid valve four and solenoid valve six are respectively fixed to one end of each three-way pipe one.

[0005] As a further improvement of this utility model: an oxygen delivery pipe is fixed between the four solenoid valves and the six solenoid valves, and a nitrogen delivery pipe is fixed at the other end of the three-way pipe.

[0006] As a further improvement of this utility model, pressure gauges are installed on the sides of both adsorption tower one and adsorption tower two.

[0007] As a further improvement of this utility model, the solenoid valve one and the solenoid valve seven are connected by an air delivery pipe.

[0008] As a further embodiment of this utility model: the oxygen delivery pipe includes a connecting pipe three, a solenoid valve five, and a three-way pipe two. The two ends of the three-way pipe two are fixedly connected to solenoid valve four and solenoid valve six respectively, and the solenoid valve five is fixed between the connecting pipe three and the three-way pipe two.

[0009] As a further embodiment of this utility model: the nitrogen delivery pipe includes a solenoid valve eight and a solenoid valve nine. The solenoid valve eight and the solenoid valve nine are respectively fixed to one end of two three-way pipes one, and a three-way pipe three is fixed between the solenoid valve eight and the solenoid valve nine. A solenoid valve three is fixed to one end of the three-way pipe three, and a connecting pipe two is fixed to the end of the solenoid valve three away from the three-way pipe three.

[0010] As a further embodiment of this utility model: the support mechanism includes a support base and a fixing plate. The fixing plate is welded to the top outer wall of the support base, and the two fixing plates are welded and fixed to the sides of adsorption tower one and adsorption tower two, respectively.

[0011] As a further embodiment of this utility model: an installation plate is welded between the first adsorption tower and the second adsorption tower, and a controller is installed on the top outer wall of the installation plate.

[0012] Compared with the prior art, this utility model provides a symmetrical mixed flow oxygen and nitrogen separation and production machine, which has the following beneficial effects: 1. The dual adsorption tower symmetrical design is adopted. The timing switching of the solenoid valve group is precisely controlled by the controller, so that the two towers alternately perform the cycle of pressurized adsorption to produce oxygen and depressurized desorption to remove nitrogen. When one tower (such as adsorption tower one) is in the adsorption separation stage, the other tower (adsorption tower two) is regenerated simultaneously, which ensures the continuous and stable output of oxygen and nitrogen, eliminates the production interruption of the single tower system, and greatly improves the production efficiency of the equipment and the stability of gas supply.

[0013] 2. Utilizing the highly selective adsorption characteristics of zeolite molecular sieves for nitrogen, nitrogen is preferentially adsorbed under high pressure to obtain high-purity oxygen. The symmetrical flow channel design, along with the coordination of components such as the three-way pipe and pressure regulating valve, optimizes the pressure change process within the tower, making the adsorption and desorption processes more complete and efficient.

[0014] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model has a simple structure and is easy to operate. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a symmetrical mixed flow oxygen and nitrogen separation and production machine proposed in this utility model; Figure 2 This is a schematic diagram of the back structure of a symmetrical mixed flow oxygen and nitrogen separation and production machine proposed in this utility model; Figure 3 This is a schematic diagram of the conveying pipe of a symmetrical mixed flow oxygen-nitrogen separation and production machine proposed in this utility model; Figure 4 This is a schematic diagram of the conveying pipe of a symmetrical mixed flow oxygen-nitrogen separation and production machine proposed in this utility model.

[0016] In the diagram: Support base 1; Fixing plate 2; Adsorption tower 1 3; Connecting pipe 1 4; Butt pipe 1 5; T-pipe 6; Solenoid valve 1 7; Connecting pipe 2 8; Adsorption tower 2 9; Connecting pipe 3 10; T-pipe 1 11; Connecting pipe 4 12; Controller 13; Solenoid valve 2 14; Pressure gauge 15; Butt pipe 2 16; Solenoid valve 3 17; Solenoid valve 4 18; Pressure regulating valve 19; Butt pipe 3 20; Solenoid valve 5 21; T-pipe 2 22; Pressure regulating valve 1 23; Solenoid valve 6 24; Solenoid valve 7 25; Mounting plate 26; Solenoid valve 8 27; Solenoid valve 9 28; T-pipe 3 29. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] A symmetrical mixed flow oxygen and nitrogen separation and production machine, such as Figures 1 to 4As shown, the system includes a support mechanism on which adsorption tower 3 and adsorption tower 9 are fixed. Pressure gauges 15 are installed on the sides of both adsorption towers 3 and 9. Zeolite molecular sieves are installed inside both adsorption towers 3 and 9. Connecting pipe 4 and connecting pipe 8 are fixed to the tops of adsorption tower 3 and 9 respectively via flanges. A solenoid valve 7 25 is fixed to one end of connecting pipe 4, and a solenoid valve 7 is fixed to one end of connecting pipe 8. The solenoid valves 7 and 8 are connected via an air supply pipe. The bottom outer walls of adsorption tower 13 and adsorption tower 29 are respectively fixed with connecting pipe 4 12 and connecting pipe 3 10 via flanges. One end of connecting pipe 4 12 is fixed with pressure regulating valve 1 23, and one end of connecting pipe 3 10 is fixed with pressure regulating valve 19. One end of each pressure regulating valve 1 23 and pressure regulating valve 19 is fixed with a three-way pipe 11. One end of each of the two three-way pipes 11 is fixed with solenoid valve 4 18 and solenoid valve 6 24, and an oxygen delivery pipe is fixed between solenoid valve 4 18 and solenoid valve 6 24. The other end of the three-way pipe 11 is fixed with a nitrogen delivery pipe. When it is necessary to separate oxygen and nitrogen in the air, the air is first pretreated. The specific pretreatment method is as follows: First, the air is filtered and purified. The air passes through the filter to remove dust, grease, bacteria and other impurities. Then, the ambient air is filtered and drawn into the machine by an industrial compressor for compression and cooling. After the industrial compressor compresses the air, it is cooled by a cooling device. The filter is preferably a HEPA filter, the industrial compressor is preferably a screw or reciprocating compressor, and the cooling device is preferably an air-cooled or water-cooled heat exchanger for cooling. The working principle and structure of the HEPA filter, screw or reciprocating compressor, and air-cooled or water-cooled heat exchanger are existing technologies and will not be described in detail here. After air pretreatment, it is transported through air delivery pipes. Before delivery, solenoid valves 1-7 and 4-18 are closed, while solenoid valves 6-24 and 7-25 are opened. After the air is transported through the pipes, because solenoid valve 1-7 is closed, the air can only be transported through solenoid valve 7-25. The air is then transported to the adsorption tower 3 through solenoid valve 7-25 and connecting pipe 1-4. Simultaneously, connecting pipe 4-12 is used to regulate the internal pressure of adsorption tower 3, increasing the internal pressure. Under high pressure, adsorption tower 3 is equipped with... The zeolite molecular sieve has a strong adsorption capacity for nitrogen in the air. Under high pressure, the zeolite molecular sieve will adsorb a large amount of nitrogen in the air, accounting for about 78%, while oxygen accounts for about 21%. Other gases such as argon are not easily adsorbed and thus pass through the zeolite molecular sieve. The gas that passes through the zeolite molecular sieve is high-concentration oxygen, usually up to 93% ± 3%. This oxygen is finally discharged through the oxygen delivery pipe after passing through the pressure regulating valve 23 and the solenoid valve 24. The exhaust end of the oxygen delivery pipe can be equipped with a gas storage tank (not shown), and the oxygen can be stored in the gas storage tank. When the oxygen supply is completed and the nitrogen adsorbed in adsorption tower 3 needs to be desorbed, open solenoid valve 7 and solenoid valve 4 18, and close solenoid valve 6 24 and solenoid valve 7 25. At this time, the zeolite molecular sieve in adsorption tower 2 9 will perform a series of nitrogen adsorption operations on the air, thereby ensuring that the oxygen supply pipe can continuously store the high concentration of oxygen after separation. When the nitrogen adsorbed by the zeolite molecular sieve in adsorption tower 3 is desorbed, the pressure regulating valve 23 will be used to reduce the pressure inside adsorption tower 3 so that the adsorbed nitrogen is desorbed and then transported to the nitrogen supply pipe through the three-way pipe 11. Similarly, a second gas storage tank can be installed at the output end of the nitrogen supply pipe to store nitrogen. By alternating the operation of adsorption tower 3 and adsorption tower 9, one adsorbs and the other desorbs, a continuous output of oxygen is achieved.

[0019] The oxygen delivery pipe fitting includes a connecting pipe 5, a three-way pipe 6, and a solenoid valve 14. The two ends of the three-way pipe 6, which are on the same straight line, are fixedly connected to the solenoid valve 7 and the solenoid valve 25, respectively. The other end of the three-way pipe 6 is fixedly connected to the solenoid valve 14, and the input end of the solenoid valve 14 is fixedly connected to the connecting pipe 5. When air is being transported, solenoid valve 725 is connected to the output end of the cooling equipment. When solenoid valve 214 is opened, the pre-treated air is transported through the three-way pipe 6 to solenoid valve 17 or solenoid valve 725.

[0020] The oxygen delivery pipe fitting includes a connecting pipe 3 20, a solenoid valve 5 21, and a three-way pipe 22. The two ends of the three-way pipe 22 are fixedly connected to the solenoid valve 4 18 and the solenoid valve 6 24 respectively. The solenoid valve 5 21 is fixed between the connecting pipe 3 20 and the three-way pipe 22. When oxygen is output, the connecting pipe 320 and the oxygen storage tank are connected and fixed. When the solenoid valve 521 is opened, oxygen is delivered through the connecting pipe 320 to the storage tank for storage. The nitrogen delivery pipe includes a solenoid valve 27 and a solenoid valve 28. The solenoid valve 27 and the solenoid valve 28 are respectively fixed to one end of two three-way pipes 11, and a three-way pipe 29 is fixed between the solenoid valve 27 and the solenoid valve 28. A solenoid valve 17 is fixed to one end of the three-way pipe 29, and a connecting pipe 2 16 is fixed to the end of the solenoid valve 17 away from the three-way pipe 29. When nitrogen is output, the connecting pipe 2 16 and the nitrogen storage tank are connected and fixed, so that nitrogen is delivered to the nitrogen storage tank through the three-way pipe 1 11, solenoid valve 3 17, solenoid valve 8 27 or solenoid valve 9 28 and connecting pipe 2 16.

[0021] The support mechanism includes a support base 1 and a fixing plate 2. The fixing plate 2 is welded to the top outer wall of the support base 1, and the two fixing plates 2 are respectively welded and fixed to the sides of the adsorption tower 3 and the adsorption tower 9. The adsorption tower 3 and adsorption tower 9 can be supported and fixed by the support base 1 and the fixing plate 2.

[0022] An installation plate 26 is welded between the adsorption tower 3 and the adsorption tower 9, and a controller 13 is installed on the top outer wall of the installation plate 26. The controller 13 automatically controls the opening, closing and switching of solenoid valves 7 to 25 through a preset program, and monitors the data of pressure gauge 15, thereby precisely regulating the pressurized adsorption and depressurized desorption processes of the two adsorption towers, and realizing the automatic, continuous and alternating operation of oxygen and nitrogen separation and output.

[0023] Working principle: Pretreated air that has been filtered, compressed and cooled is alternately pumped into two adsorption towers 3 and 9, which are equipped with zeolite molecular sieves. Under high pressure, the molecular sieves preferentially adsorb nitrogen in the air, allowing oxygen to pass through and be output from the oxygen delivery pipe. When adsorption tower 3 is in the adsorption and oxygen production stage, adsorption tower 9 depressurizes the nitrogen adsorbed by the zeolite molecular sieve and discharges it from the nitrogen delivery pipe.

[0024] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A symmetrical mixed flow oxygen and nitrogen separation and production machine, comprising a support mechanism, characterized in that, Adsorption tower one (3) and adsorption tower two (9) are fixed on the support structure respectively. Both adsorption tower one (3) and adsorption tower two (9) are equipped with zeolite molecular sieves. Connecting pipe one (4) and connecting pipe two (8) are fixed to the top of adsorption tower one (3) and the top of adsorption tower two (9) respectively through flanges. Solenoid valve seven (25) is fixed to one end of connecting pipe one (4), and solenoid valve one (7) is fixed to one end of connecting pipe two (8). The bottom of adsorption tower one (3) The outer wall and the bottom outer wall of the adsorption tower 2 (9) are respectively fixed with connecting pipe 4 (12) and connecting pipe 3 (10) by flanges. One end of connecting pipe 4 (12) is fixed with pressure regulating valve 1 (23), and one end of connecting pipe 3 (10) is fixed with pressure regulating valve (19). One end of pressure regulating valve 1 (23) and pressure regulating valve (19) is fixed with three-way pipe 1 (11). One end of each of the two three-way pipes 1 (11) is fixed with solenoid valve 4 (18) and solenoid valve 6 (24).

2. The symmetrical mixed flow oxygen and nitrogen separation and production machine according to claim 1, characterized in that, An oxygen delivery pipe is fixed between the four (18) and six (24) solenoid valves, and a nitrogen delivery pipe is fixed at the other end of the three-way pipe (11).

3. The symmetrical mixed flow oxygen and nitrogen separation and production machine according to claim 2, characterized in that, Pressure gauges (15) are installed on the sides of both adsorption tower one (3) and adsorption tower two (9).

4. The symmetrical mixed flow oxygen and nitrogen separation and production machine according to claim 3, characterized in that, The solenoid valve 1 (7) and solenoid valve 7 (25) are connected by an air delivery pipe.

5. The symmetrical mixed flow oxygen and nitrogen separation and production machine according to claim 4, characterized in that, The oxygen delivery pipe includes a connecting pipe three (20), a solenoid valve five (21) and a three-way pipe two (22). The two ends of the three-way pipe two (22) are fixedly connected to the solenoid valve four (18) and the solenoid valve six (24) respectively. The solenoid valve five (21) is fixed between the connecting pipe three (20) and the three-way pipe two (22).

6. The symmetrical mixed flow oxygen and nitrogen separation and production machine according to claim 5, characterized in that, The nitrogen delivery pipe includes a solenoid valve eight (27) and a solenoid valve nine (28). The solenoid valve eight (27) and the solenoid valve nine (28) are respectively fixed to one end of two three-way pipes one (11), and a three-way pipe three (29) is fixed between the solenoid valve eight (27) and the solenoid valve nine (28). A solenoid valve three (17) is fixed to one end of the three-way pipe three (29), and a connecting pipe two (16) is fixed to the end of the solenoid valve three (17) away from the three-way pipe three (29).

7. The symmetrical mixed flow oxygen and nitrogen separation and production machine according to claim 1, characterized in that, The support mechanism includes a support base (1) and a fixing plate (2). The fixing plate (2) is welded to the top outer wall of the support base (1). The two fixing plates (2) are welded and fixed to the sides of the adsorption tower one (3) and the adsorption tower two (9), respectively.

8. The symmetrical mixed flow oxygen and nitrogen separation and production machine according to claim 7, characterized in that, An installation plate (26) is welded between the first adsorption tower (3) and the second adsorption tower (9), and a controller (13) is installed on the top outer wall of the installation plate (26).

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