Oxygen generation system capable of supplementing molecular sieves on line

Abstract

The utility model relates to molecular sieve oxygen generation, and particularly discloses an oxygen generation system capable of supplementing molecular sieves on line, which comprises an adsorption tank, a supplementing tank arranged above the adsorption tank, a supplementing pipe used for connecting the supplementing tank and the adsorption tank, a feeding pipe arranged at the upper end of the supplementing tank, and a pressurizing pipe used for connecting the adsorption tank and the supplementing tank, the first sealing valve is arranged on the feeding pipe, the second sealing valve is arranged on the supplementing pipe, and the third sealing valve is arranged on the pressurizing pipe. According to the oxygen generation system capable of supplementing the molecular sieve on line, the molecular sieve can be efficiently supplemented on line in real time.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of molecular sieve oxygen making, in particular to an oxygen making system with on-line molecular sieve supplement. BACKGROUND

[0002] Molecular sieve oxygen making machine is a kind of equipment for separating and preparing high-purity oxygen from air using the adsorption characteristics of molecular sieve. Its working principle is to compress air through a compression system, then cool it through a cooling system, remove impurities through a filtering system, and finally separate nitrogen and oxygen through a molecular sieve adsorption system to obtain high-purity oxygen.

[0003] During the whole process, molecular sieve will adsorb nitrogen, but the amount of nitrogen adsorbed by molecular sieve is limited, so saturated molecular sieve needs to be taken out for desorption. This process involves replacing or supplementing molecular sieve, which usually requires shutdown operation. This not only makes the operation cumbersome, but also affects the oxygen making efficiency. Therefore, a device capable of real-time supplement of molecular sieve is needed. UTILITY MODEL CONTENT

[0004] The utility model aims to provide an oxygen making system with on-line molecular sieve supplement, which can efficiently supplement molecular sieve in real time.

[0005] The utility model realizes the following technical scheme: the oxygen making system with on-line molecular sieve supplement of the utility model, including adsorption tank, supplement tank arranged above the adsorption tank, supplement pipe used to connect the supplement tank and the adsorption tank, feed pipe arranged on the upper end of the supplement tank, pressurizing pipe used to connect the adsorption tank and the supplement tank, first sealing valve arranged on the feed pipe, second sealing valve arranged on the supplement pipe, and third sealing valve arranged on the pressurizing pipe.

[0006] Further, a pressure relief valve is arranged on the supplement tank, and a manometer is arranged on the supplement tank.

[0007] Further, a first gate valve is arranged on the feed pipe, and the first gate valve is arranged above the first sealing valve; a second gate valve is arranged on the supplement pipe, and the second gate valve is arranged above the second sealing valve.

[0008] Further, a discharge device is arranged at the lower end of the adsorption tank; the discharge device includes a discharge pipe arranged inside the lower end of the adsorption tank, a storage tank arranged below the adsorption tank, a discharge pipe arranged at the lower end of the storage tank, a third gate valve arranged on the discharge pipe, a connecting pipe used to connect the discharge pipe and the storage tank, a plurality of discharge holes arranged on the side wall of the discharge pipe, and a fourth sealing valve arranged on the connecting pipe; the upper end of the discharge pipe is a closed end, and the diameter of the discharge hole is greater than the diameter of the molecular sieve.

[0009] Further, the lower end of the adsorption tank is a conical structure with a large upper end and a small lower end, a ring-shaped rubber ring is fixedly arranged on the inner wall of the lower end of the adsorption tank, and the outer wall of the discharge pipe abuts against the rubber ring; the storage tank is connected with a vibration motor.

[0010] Further, the fourth gate valve is arranged above the fourth sealing valve.

[0011] Further, the air inlet device further comprises an air inlet tank connected with one end of the air inlet pipe arranged in the adsorption tank, a plurality of air inlet holes are formed in the side wall of the air inlet tank, the diameter of the air inlet hole is smaller than the diameter of the molecular sieve, and both ends of the air inlet pipe are closed ends.

[0012] Further, the air inlet device further comprises an air inlet tank connected with one end of the air inlet pipe arranged in the adsorption tank, a plurality of air inlet holes are formed in the side wall of the air inlet tank, the diameter of the air inlet hole is smaller than the diameter of the molecular sieve, and both ends of the air inlet pipe are closed ends.

[0013] The technical scheme of the utility model has at least the following advantages and beneficial effects: the oxygen generating system of the utility model for on-line supplement of molecular sieve sends the compressed air from the outside into the adsorption tank during use, absorbs nitrogen, carbon dioxide and other gases in the air through the molecular sieve in the adsorption tank, and discharges oxygen through the exhaust pipe to achieve the purpose of oxygen generation. Since the molecular sieve at the lowermost part of the adsorption tank first contacts the air, this part of the molecular sieve will be consumed first, so it is necessary to supplement the molecular sieve. Before supplementing, the first sealing valve, the second sealing valve and the third sealing valve are all in the closed state. During supplementing, the first sealing valve is first opened, new molecular sieve is put into the supplementing tank through the feeding pipe, then the first sealing valve is closed, the third sealing valve is opened, the high-pressure gas in the adsorption tank slowly enters the supplementing tank, when the pressure in the supplementing tank is equal to that in the adsorption tank, the third sealing valve is closed, then the second sealing valve is opened, the molecular sieve in the supplementing tank is sent into the adsorption tank through the supplementing tank, and then the second sealing valve is closed. In this way, one round of supplementing operation of the molecular sieve is completed. The whole process can be operated on-line, does not affect the normal flow of gas in the adsorption tank, does not affect the oxygen generation process, has good overall sealing performance, does not cause gas leakage, etc., can effectively improve the updating efficiency of the molecular sieve, does not need to stop the machine to replace the molecular sieve, and can effectively improve the oxygen generation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The structure diagram of the oxygen generating system of the utility model for on-line supplement of molecular sieve is provided.

[0015] Figure 2 The structure diagram of the adsorption tank inside the utility model is provided.

[0016] Figure 3 The structure schematic diagram of the inside of the supplementary tank provided by the embodiment of the utility model;

[0017] Figure 4 The structure schematic diagram of the part of the discharging device provided by the embodiment of the utility model.

[0018] Icon: 11-adsorption tank, 12-exhaust pipe, 13-inlet device, 131-inlet pipe, 132-inlet tank, 133-inlet hole, 21-supplementary tank, 22-feeding pipe, 23-supplementary pipe, 24-first sealing valve, 25-second sealing valve, 26-first gate valve, 27-second gate valve, 28-pressurizing pipe, 29-third sealing valve, 210-pressure relief valve, 211-barometer, 30-discharging device, 31-discharging pipe, 32-discharging hole, 33-connecting pipe, 34-storage tank, 35-fourth sealing valve, 36-third gate valve, 37-fourth gate valve, 38-vibration motor, 39-rubber ring, 310-discharging pipe. DETAILED DESCRIPTION

[0019] EMBODIMENT

[0020] The following will be further explained in combination with specific embodiments, such as the accompanying drawings Figure 1 - the accompanying drawings Figure 4As shown, the oxygen generating system of the present embodiment is provided with an adsorption tank 11, a supplement tank 21 arranged above the adsorption tank 11, a supplement pipe 23 connecting the supplement tank 21 and the adsorption tank 11, a feeding pipe 22 arranged at the upper end of the supplement tank 21, a pressurizing pipe 28 connecting the adsorption tank 11 and the supplement tank 21, a first sealing valve 24 arranged on the feeding pipe 22, a second sealing valve 25 arranged on the supplement pipe 23, and a third sealing valve 29 arranged on the pressurizing pipe 28. In use, compressed air from outside is fed into the adsorption tank 11, and the nitrogen and carbon dioxide in the air are absorbed by the molecular sieve in the adsorption tank 11, and the oxygen is discharged through the exhaust pipe 12, so as to achieve the purpose of generating oxygen. Since the molecular sieve at the lowermost part of the adsorption tank 11 is first contacted with the air, the molecular sieve at the lowermost part of the adsorption tank 11 is consumed first, and therefore, the molecular sieve needs to be supplemented. Before the supplement, the first sealing valve 24, the second sealing valve 25 and the third sealing valve 29 are all closed. During the supplement, the first sealing valve 24 is first opened, and new molecular sieve is fed into the supplement tank 21 through the feeding pipe 22, then the first sealing valve 24 is closed, the third sealing valve 29 is opened, and the high-pressure gas in the adsorption tank 11 slowly enters the supplement tank 21. When the pressure in the supplement tank 21 is equal to the pressure in the adsorption tank 11, the third sealing valve 29 is closed, and then the second sealing valve 25 is opened, and the molecular sieve in the supplement tank 21 is fed into the adsorption tank 11 through the supplement pipe 23, and then the second sealing valve 25 is closed. In this way, one round of supplement of the molecular sieve is completed. The whole process can be operated on line, and will not affect the normal flow of the gas in the adsorption tank 11, and will not affect the oxygen generating process. The whole sealing performance is good, and gas leakage will not occur. The efficiency of the renewal of the molecular sieve can be effectively improved, and the molecular sieve does not need to be replaced during shutdown, and the oxygen generating efficiency can be effectively improved.

[0021] The supplement tank 21 in the present embodiment is provided with a pressure relief valve 210, and the supplement tank 21 is provided with a gas pressure gauge 211. Specifically, before the first sealing valve 24 is opened to feed new molecular sieve into the supplement tank 21, the high-pressure gas in the supplement tank 21 is discharged through the pressure relief valve 210.

[0022] The feeding pipe 22 in the present embodiment is provided with a first gate valve 26, and the first gate valve 26 is arranged above the first sealing valve 24. The supplement pipe 23 is provided with a second gate valve 27, and the second gate valve 27 is arranged above the second sealing valve 25. Specifically, the first sealing valve 24 and the second sealing valve 25 mainly play the role of gas sealing, and the first gate valve 26 and the second gate valve 27 are used to block the molecular sieve, so as to avoid the contact between the first sealing valve 24 and the second sealing valve 25 and the granular molecular sieve, and prevent the problem of poor sealing.

[0023] The lower end of the adsorption tank 11 in the embodiment is provided with a discharging device 30; the discharging device 30 comprises a discharging pipe 31 arranged inside the lower end of the adsorption tank 11, a storage tank 34 arranged below the adsorption tank 11, a discharging pipe 310 arranged at the lower end of the storage tank 34, a third gate valve 36 arranged on the discharging pipe, a connecting pipe 33 for connecting the discharging pipe 31 and the storage tank 34, a plurality of discharging holes 32 arranged on the side wall of the discharging pipe 31, and a fourth sealing valve 35 arranged on the connecting pipe 33; the upper end of the discharging pipe 31 is a closed end, and the diameter of the discharging hole 32 is greater than the diameter of the molecular sieve. Specifically, the molecular sieve at the lowermost end of the adsorption tank 11 enters the discharging pipe 31 through the discharging hole 32, and then enters the storage tank 34 through the connecting pipe 33 for temporary storage, and finally can be discharged through the discharging pipe 310.

[0024] The lower end of the adsorption tank 11 in the embodiment is a conical structure with a large upper end and a small lower end, and a ring-shaped rubber ring 39 is fixedly arranged on the inner wall of the lower end of the adsorption tank 11, and the outer wall of the discharging pipe 31 abuts against the rubber ring 39; the storage tank 34 is connected with a vibration motor 38. Specifically, the vibration motor 38 can cause the storage tank 34, the connecting pipe 33 and the discharging pipe 31 to vibrate slightly, which is more conducive to promoting the molecular sieve to enter the discharging pipe 31. Since the discharging pipe 31 and the adsorption tank 11 are sealed by the rubber ring 39, even if the discharging pipe 31 vibrates to a certain extent, a good sealing effect can still be ensured.

[0025] The connecting pipe 33 in the embodiment is provided with a fourth gate valve 37, and the fourth gate valve 37 is arranged above the fourth sealing valve 35. Specifically, the fourth gate valve 37 also serves to prevent the molecular sieve from directly contacting the fourth sealing valve 35.

[0026] The embodiment further comprises an air inlet device 13; the air inlet device 13 comprises an air inlet pipe 131 arranged in the adsorption tank 11, and an air compressor connected with the air inlet pipe 131; one end of the air inlet pipe 131 away from the air compressor is arranged at the lower end inside the adsorption tank 11. Specifically, the air is sent into the adsorption tank 11 through the air inlet pipe 131 after being compressed, filtered and cooled by the air compressor and other conventional treatments.

[0027] The air inlet device 13 in the embodiment further comprises an air inlet tank 132 connected with one end of the air inlet pipe 131 arranged in the adsorption tank 11, a plurality of air inlet holes 133 are arranged on the side wall of the air inlet tank 132, the diameter of the air inlet hole 133 is smaller than the diameter of the molecular sieve, and both ends of the air inlet pipe 131 are closed ends. Specifically, the air can enter the adsorption tank 11 more uniformly and dispersedly, and can better contact the molecular sieve.

[0028] In summary, the oxygen generating system of the present embodiment is used to send the compressed air from the outside into the adsorption tank 11, and the nitrogen and carbon dioxide in the air are absorbed by the molecular sieve in the adsorption tank 11, and the oxygen is discharged through the exhaust pipe 12, so as to achieve the purpose of generating oxygen. Since the molecular sieve at the bottom of the adsorption tank 11 first contacts the air, this part of the molecular sieve will be consumed first, so it is necessary to supplement the molecular sieve. Before the supplement, the first sealing valve 24, the second sealing valve 25 and the third sealing valve 29 are all in the closed state. When supplementing, the first sealing valve 24 is first opened, new molecular sieve is put into the supplement tank 21 through the feed pipe 22, then the first sealing valve 24 is closed, the third sealing valve 29 is opened, so that the high-pressure gas in the adsorption tank 11 slowly enters the supplement tank 21. When the supplement tank 21 and the adsorption tank 11 are at the same pressure, the third sealing valve 29 is closed, then the second sealing valve 25 is opened, the molecular sieve in the supplement tank 21 is sent into the adsorption tank 11 through the supplement tank 21, then the second sealing valve 25 is closed. Thus, one round of molecular sieve supplement operation is completed. The whole process can be operated online, will not affect the normal flow of gas in the adsorption tank 11, will not affect the oxygen generating process, and the overall sealing performance is good, will not produce gas leakage, etc. It can effectively improve the updating efficiency of the molecular sieve, does not need to stop replacing the molecular sieve, and can effectively improve the oxygen generating efficiency.

[0029] The above is only the preferred embodiment of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various changes 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 online oxygen generation system for replenishing molecular sieves, characterized in that: It includes an adsorption tank (11), a replenishment tank (21) located above the adsorption tank (11), a replenishment pipe (23) for connecting the replenishment tank (21) and the adsorption tank (11), a feed pipe (22) located at the upper end of the replenishment tank (21), a pressurization pipe (28) for connecting the adsorption tank (11) and the replenishment tank (21), a first sealing valve (24) located on the feed pipe (22), a second sealing valve (25) located on the replenishment pipe (23), and a third sealing valve (29) located on the pressurization pipe (28).

2. The online oxygen generation system for replenishing molecular sieves according to claim 1, characterized in that: The replenishment tank (21) is equipped with a pressure relief valve (210) and a barometer (211).

3. The online oxygen generation system for replenishing molecular sieves according to claim 1, characterized in that: The feed pipe (22) is provided with a first gate valve (26), which is located above the first sealing valve (24); The replenishment pipe (23) is provided with a second gate valve (27), which is located above the second sealing valve (25).

4. The online oxygen generation system for replenishing molecular sieves according to claim 1, characterized in that: The adsorption tank (11) is equipped with a discharge device (30) at its lower end; The discharge device (30) includes a discharge pipe (31) located inside the lower end of the adsorption tank (11), a storage tank (34) located below the adsorption tank (11), a discharge pipe (310) located at the lower end of the storage tank (34), a third gate valve (36) located on the discharge pipe, a connecting pipe (33) for connecting the discharge pipe (31) and the storage tank (34), a plurality of discharge holes (32) located on the side wall of the discharge pipe (31), and a fourth sealing valve (35) located on the connecting pipe (33). The upper end of the discharge pipe (31) is a closed end, and the diameter of the discharge hole (32) is larger than the diameter of the molecular sieve.

5. The online supplementary molecular sieve oxygen generation system according to claim 4, characterized in that: The lower end of the adsorption tank (11) is a conical structure with a larger upper end and a smaller lower end. An annular rubber ring (39) is fixedly provided on the inner wall of the lower end of the adsorption tank (11). The outer wall of the discharge pipe (31) abuts against the rubber ring (39). The storage tank (34) is connected to a vibration motor (38).

6. The online oxygen generation system for replenishing molecular sieves according to claim 4, characterized in that: The connecting pipe (33) is provided with a fourth gate valve (37), which is located above the fourth sealing valve (35).

7. The online oxygen generation system for replenishing molecular sieves according to claim 1, characterized in that: It also includes an air intake device (13); the air intake device (13) includes an air intake pipe (131) disposed in the adsorption tank (11) and an air compressor connected to the air intake pipe (131); the end of the air intake pipe (131) away from the air compressor is disposed at the lower end of the adsorption tank (11).

8. The online oxygen generation system for replenishing molecular sieves according to claim 7, characterized in that: The air intake device (13) also includes an air intake tank (132) connected to one end of the air intake pipe (131) located inside the adsorption tank (11). The side wall of the air intake tank (132) is provided with a plurality of air intake holes (133). The diameter of the air intake holes (133) is smaller than the diameter of the molecular sieve. Both ends of the air intake pipe (131) are closed ends.

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