Oxygen generating device and ozone preparation system saving regenerated gas amount

Abstract

The utility model belongs to the technical field of oxygen production equipment, provide an oxygen production device and ozone preparation system of saving regenerative gas quantity, oxygen production device of saving regenerative gas quantity includes installation base, is fixedly installed with first adsorption drying tower, second adsorption drying tower, first oxygen production adsorption tower and second oxygen production adsorption tower on installation base, first adsorption drying tower is communicated with oxygen production intake manifold through first air inlet branch pipe, is communicated with exhaust port through first exhaust branch pipe, is communicated with first oxygen production adsorption tower through first inter-tower gas conveying pipe, second adsorption drying tower is communicated with oxygen production intake manifold through second air inlet branch pipe, is communicated with exhaust port through second exhaust branch pipe, is communicated with second oxygen production adsorption tower through second inter-tower gas conveying pipe, first oxygen production adsorption tower is communicated with second oxygen production adsorption tower through oxygen conveying pipe, and oxygen conveying pipe still has oxygen production exhaust manifold that communicates, the utility model discloses compact structure, small, has saved regenerative exhaust volume, and operating energy consumption and investment cost greatly reduce.

Description

Technical Field

[0001] This utility model relates to the field of oxygen production equipment technology, and in particular to an oxygen production device and ozone preparation system that saves regeneration gas volume. Background Technology

[0002] With my country's economic development and increasing emphasis on environmental protection, ozone applications are gaining popularity across various industries. Due to its green and environmentally friendly nature and lack of secondary pollution, it is widely used in disinfection, medical treatment, air and water purification, food preservation, industrial wastewater treatment, and agriculture. Its high efficiency and environmental friendliness have driven innovation in multiple industries. Specifically, ozone decomposes organic pollutants (such as pesticides and heavy metals) in water through its strong oxidizing properties, killing bacteria and viruses. It is commonly used in water treatment plants and swimming pools for disinfection, leaving the treated water odorless and free of chemical residues. Ozone can also decompose toxic substances (such as cyanide and phenol) in industrial wastewater, improving water safety. In industrial or hospital environments, ozone can rapidly degrade formaldehyde and odors, and inactivate pathogenic microorganisms in the air.

[0003] Most industrial methods for ozone production involve using an ozone generator to discharge compressed air (or oxygen) with high voltage electricity. The gas source for the ozone generator is usually prepared using a pressure swing adsorption (PSA) oxygen generation process through a gas source treatment system. The power consumption of the gas source treatment system accounts for about 50% of the entire ozone production system, and the energy consumption of the adsorption dryer and the PSA oxygen generator in the gas source treatment system accounts for about 13%-15% of the energy consumption of the gas source treatment system, while the cost accounts for about 40%-50%.

[0004] The moisture content of the gas source is crucial for ensuring the normal operation of the ozone generator. GB / T37894-2019 "Technical Requirements for Ozone Generators for Water Treatment" requires that the dew point of the gas source for pressure swing adsorption (PSA) oxygen generation with a capacity of ≥1 m³ / h be ≤-60℃. Therefore, the adsorption dryer in the PSA oxygen generation system for ozone preparation is a key device to ensure the dew point of the gas source. The adsorption dryer in the PSA oxygen generation system generally uses a non-thermal adsorption drying process, and its regeneration gas consumption is generally 13-15% of its rated processing capacity.

[0005] Currently, the gas source treatment section of a conventional pressure swing adsorption (PSA) oxygen generation system includes a heatless adsorption dryer 1, an air storage tank 2, a PSA oxygen generator 3, and an oxygen storage tank 4 connected in sequence, such as... Figure 1 As shown, compressed air is dried by a heatless adsorption dryer 1 and then temporarily stored in an air storage tank 2. Afterward, it enters a pressure swing adsorption oxygen generator 3 for nitrogen adsorption, and the resulting oxygen is temporarily stored in an oxygen storage tank 4. Figure 2As shown, the heatless adsorption dryer 1 includes two adsorption drying towers. The two adsorption drying towers work in a cycle and switch at regular intervals according to a certain working cycle. When one adsorption drying tower is working, the other adsorption drying tower is regenerated. The regeneration of the adsorption drying tower is achieved by backflushing the adsorbent with the finished compressed air from the pressure swing adsorption oxygen generation system. When the adsorption drying tower is working, part of the dried finished gas produced flows to the air storage tank, and part flows to the other adsorption drying tower for backflushing the adsorbent. The regenerated gas after backflushing is directly discharged into the air. The pressure swing adsorption oxygen generator 3 includes two oxygen-generating adsorption towers. The two oxygen-generating adsorption towers work in a cycle and switch at regular intervals according to a certain working cycle. When one oxygen-generating adsorption tower is working, the other oxygen-generating adsorption tower is regenerated. When the oxygen-generating adsorption tower is working, part of the oxygen produced flows to the oxygen storage tank 4, and part flows to the other oxygen-generating adsorption tower for backflushing the molecular sieve. The regenerated gas after backflushing is directly discharged into the air.

[0006] Although the aforementioned pressure swing adsorption oxygen generation system can produce the gas source required for an ozone generator, it has gradually been found to have the following drawbacks during use: (1) The heatless adsorption dryer and the pressure swing adsorption oxygen generator use the finished gas generated during their respective operation for regeneration, and the regeneration exhaust gas is directly discharged, which makes the operating energy consumption of the pressure swing adsorption oxygen generator system high. (2) The working cycle of the heatless adsorption dryer is 5-10 times that of the pressure swing adsorption oxygen generator in the same system. Therefore, the adsorption drying tower of the heatless adsorption dryer not only contains a lot of adsorption desiccant, but also has a large volume and high cost. (3) The heatless adsorption dryer and the pressure swing adsorption oxygen generator are two independent devices, and the heatless adsorption dryer is equipped with a separate control system. This further increases the footprint and investment cost of the pressure swing adsorption oxygen generator system. Utility Model Content

[0007] In order to overcome the shortcomings of the prior art as mentioned above, in-depth research was conducted, and after a great deal of creative work, this utility model was completed.

[0008] Specifically, the technical problem to be solved by this utility model is to provide an oxygen generation device and ozone preparation system that saves regeneration gas, so as to solve the technical problems of high energy consumption, large equipment footprint and high investment cost of the current pressure swing adsorption oxygen generation system.

[0009] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: An oxygen production device that saves regenerated gas includes a mounting base on which a first adsorption drying tower, a second adsorption drying tower, a first oxygen production adsorption tower, and a second oxygen production adsorption tower are fixedly mounted. The first adsorption drying tower is connected to the oxygen production air intake main pipe through the first air intake branch pipe, the first adsorption drying tower is connected to the exhaust port through the first exhaust branch pipe, and the first adsorption drying tower is connected to the first oxygen production adsorption tower through the first inter-tower air supply pipe. The second adsorption drying tower is connected to the oxygen production air intake main pipe through the second air intake branch pipe, the second adsorption drying tower is connected to the exhaust port through the second exhaust branch pipe, and the second adsorption drying tower is connected to the second oxygen production adsorption tower through the second inter-tower air supply pipe. The first oxygen-generating adsorption tower is connected to the second oxygen-generating adsorption tower through an oxygen supply pipeline, and the oxygen supply pipeline is also connected to an oxygen-generating outlet main pipe. At least one pneumatic valve is provided on the first air inlet branch pipe, the second air inlet branch pipe, the first exhaust branch pipe, the second exhaust branch pipe, and the oxygen supply pipeline. A check valve and a manual valve are provided on the main oxygen supply pipe.

[0010] As an improved technical solution, a first pneumatic valve is provided on the first intake branch pipe, a second pneumatic valve is provided on the second intake branch pipe, a third pneumatic valve is provided on the first exhaust branch pipe, and a fourth pneumatic valve is provided on the second exhaust branch pipe. The oxygen supply pipeline includes a first oxygen supply branch pipe and a second oxygen supply branch pipe that are connected to each other. The first oxygen-generating adsorption tower is connected to the second oxygen-generating adsorption tower through the first oxygen supply branch pipe and the second oxygen supply branch pipe. The first oxygen-generating adsorption tower is connected to the oxygen-generating gas outlet main pipe through the first oxygen supply branch pipe. The second oxygen-generating adsorption tower is connected to the oxygen-generating gas outlet main pipe through the second oxygen supply branch pipe. A fifth pneumatic valve is provided on the first oxygen supply branch pipe, and a sixth pneumatic valve is provided on the second oxygen supply branch pipe.

[0011] As an improved technical solution, a pressure equalization pipeline is also provided between the first adsorption drying tower and the second adsorption drying tower. The first adsorption drying tower is connected to the second adsorption drying tower through the pressure equalization pipeline, and at least one pneumatic valve is provided on the pressure equalization pipeline.

[0012] As an improved technical solution, a gas connection pipe is provided between the pressure equalization pipe and the oxygen delivery pipe, and the pressure equalization pipe is connected to the oxygen delivery pipe through the gas connection pipe.

[0013] As an improved technical solution, the pressure equalization pipeline includes a first pressure equalization branch pipe and a second pressure equalization branch pipe connected in series. The first adsorption drying tower is connected to the second adsorption drying tower through the first pressure equalization branch pipe and the second pressure equalization branch pipe. A seventh pneumatic valve is provided on the first pressure equalization branch pipe, and an eighth pneumatic valve is provided on the second pressure equalization branch pipe. One end of the gas connection pipe that connects to the oxygen delivery pipe is located between the fifth pneumatic valve and the sixth pneumatic valve, and the other end of the gas connection pipe that connects to the pressure equalization pipe is located between the seventh pneumatic valve and the eighth pneumatic valve.

[0014] As an improved technical solution, it also includes an air storage tank and an oxygen storage tank. The air outlet of the air storage tank is connected to one end of the oxygen inlet main pipe, the other end of the oxygen inlet main pipe is connected to the first inlet branch pipe and the second inlet branch pipe, one end of the oxygen outlet main pipe is connected to the oxygen delivery pipeline, and the other end of the oxygen outlet main pipe is connected to the air inlet of the oxygen storage tank.

[0015] As an improved technical solution, the air storage tank is equipped with a first vent valve, a first pressure relief valve and a first pressure gauge, the first oxygen adsorption tower is equipped with a second pressure gauge, the second oxygen adsorption tower is equipped with a third pressure gauge, and the oxygen storage tank is equipped with a second vent valve, a second pressure relief valve and a fourth pressure gauge.

[0016] This utility model also discloses an ozone preparation system, including the oxygen generation device for saving regeneration gas as described above, and further including an air compressor, a compressed gas storage tank, a first filter, a freeze dryer, a second filter, an air storage tank, an oxygen storage tank, a third filter, and an ozone generator. The compressed gas storage tank is located downstream of and connected to the air compressor. The first filter is located downstream of and connected to the compressed gas storage tank. The freeze dryer is located downstream of and connected to the first filter. The second filter is located downstream of and connected to the freeze dryer. The air storage tank is located downstream of and connected to the second filter. The outlet of the air storage tank is connected to the oxygen generation inlet main pipe. The inlet of the oxygen storage tank is connected to the oxygen generation outlet main pipe. The third filter is located downstream of and connected to the oxygen storage tank. The ozone generator is located downstream of and connected to the third filter.

[0017] As an improved technical solution, the air outlet of the air compressor is connected to the air inlet of the compressed air storage tank. Two first filters are provided, connected in parallel and series. The air outlet of the compressed air storage tank is connected to the air inlet of one of the first filters, and the air outlet of the other first filter is connected to the air inlet of the freeze dryer. The air outlet of the freeze dryer is connected to the air inlet of the second filter, and the air outlet of the second filter is connected to the air inlet of the air storage tank. Two third filters are provided, connected in parallel and series. The air outlet of the oxygen storage tank is connected to the air inlet of one of the third filters, and the air outlet of the other third filter is connected to the air inlet of the ozone generator.

[0018] After adopting the above technical solution, the beneficial effects of this utility model are: (1) The oxygen production device that saves regeneration gas has a compact structure and small size. The first adsorption drying tower and the first oxygen production adsorption tower are combined into a preparation group, and the second adsorption drying tower and the second oxygen production adsorption tower are combined into another preparation group. The two preparation groups are switched at a certain working cycle. When one preparation group is working, the other preparation group is regenerating, and the working cycles of the adsorption drying tower and the oxygen production adsorption tower are consistent. During operation, compressed air first enters the first adsorption drying tower for moisture adsorption. Then, the dried compressed air, after being processed in the first adsorption drying tower, enters the first oxygen-generating adsorption tower. In the first oxygen-generating adsorption tower, nitrogen in the dried compressed air is adsorbed by molecular sieves, thus producing oxygen. The produced oxygen is delivered through one main outlet pipe and then first enters the second oxygen-generating adsorption tower to backflush the saturated nitrogen, regenerating the second oxygen-generating adsorption tower. Then, it enters the second adsorption drying tower to backflush the saturated moisture, regenerating the second adsorption drying tower. Finally, it is discharged through the exhaust port. When the first adsorption drying tower and the first oxygen-generating adsorption tower complete one cycle, the second adsorption drying tower and the second oxygen-generating adsorption tower also complete their regeneration. Afterward, the system switches to operate the second adsorption drying tower and the second oxygen-generating adsorption tower, while simultaneously regenerating the first adsorption drying tower and the first oxygen-generating adsorption tower, and this process is repeated.

[0019] This oxygen production device, which saves regeneration gas, enables online oxygen production. Furthermore, the regeneration exhaust gas from the oxygen production adsorption tower is used to regenerate the adsorbent desiccant in the adsorption drying tower. In other words, the gas used for regenerating the adsorbent desiccant in the adsorption drying tower is the drying exhaust gas discharged from the oxygen production adsorption tower. Compared to the traditional method of using finished gas to regenerate the adsorption drying tower and then directly discharging the regeneration exhaust gas, this device achieves the reuse of the regeneration exhaust gas from the oxygen production adsorption tower, saving regeneration exhaust gas volume. Under the condition of a fixed oxygen demand, the operating energy consumption of the device is greatly reduced. In addition, this oxygen production device, which saves regeneration gas, uses a single control system. Simultaneously, the working cycles of the adsorption drying tower and the oxygen production adsorption tower are synchronized, which greatly reduces the amount and volume of adsorbent desiccant filled in the first and second adsorption drying towers, thereby significantly reducing the footprint and investment cost of the device, making it highly practical.

[0020] (2) The ozone preparation system, due to the oxygen generation device that saves regeneration gas volume, realizes the effective reuse of the dry waste gas discharged from the oxygen adsorption tower, reduces the gas volume required for the device to be processed, and saves 13%-15% of the system gas volume. Not only is the energy consumption of the oxygen generation device greatly reduced, but the exhaust volume of the air compressor is also reduced by 13%-15%. Thus, the energy consumption of the air compressor is also greatly reduced. Alternatively, a small-sized, low-energy-consumption air compressor can be selected. Compared with traditional ozone preparation equipment, the ozone preparation system has greatly reduced energy consumption and occupies a smaller area, with lower investment and operating costs, while producing the same amount of ozone. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0022] Figure 1 This is a process flow diagram of the gas source treatment section in an existing pressure swing adsorption oxygen generation system. Figure 2 This is a flowchart of the pipeline connection for the gas source treatment section of an existing pressure swing adsorption oxygen generation system. Figure 3 This is a process flow diagram of the oxygen generation device for saving regenerated gas according to this utility model; Figure 4 This is a schematic diagram of the assembly and installation structure of the adsorption drying tower and the oxygen production adsorption tower of this utility model; Figure 5 This is a pipeline connection flowchart of the oxygen generation device for saving regeneration gas according to this utility model; Figure 6This is a process flow diagram of the ozone preparation system of this utility model; Attached reference numerals: 1-Heatless adsorption dryer; 2-Air storage tank; 3-Pressure swing adsorption oxygen generator; 4-Oxygen storage tank; 5- Mounting base; 6- First adsorption drying tower; 7- Second adsorption drying tower; 8- First oxygen-generating adsorption tower; 9- Second oxygen-generating adsorption tower; 10-Oxygen production main intake pipe; 11-First intake branch pipe; 12-First exhaust branch pipe; 13-First inter-tower gas supply pipeline; 14-Second intake branch pipe; 15-Second exhaust branch pipe; 16-Second inter-tower gas supply pipeline; 17-First oxygen supply branch pipe; 18-Second oxygen supply branch pipe; 19-Oxygen production main outlet pipe; 20-First pneumatic valve; 21-Second pneumatic valve; 22-Third pneumatic valve; 23-Fourth pneumatic valve; 24-Fifth pneumatic valve; 25-Sixth pneumatic valve; 26-Check valve; 27-Manual valve; 28-First equalizing branch pipe; 29-Second equalizing branch pipe; 30-Gas connection pipeline; 31-Seventh pneumatic valve; 32-Eighth pneumatic valve; 33-First vent valve; 34-Pressure relief valve; 35-First pressure gauge; 36-Second pressure gauge; 37-Third pressure gauge; 38-Second vent valve; 39-Fourth pressure gauge; 40-Air compressor; 41-Compressed gas storage tank; 42-First filter; 43-Refrigerated dryer; 44-Second filter; 45-Third filter; 46-Ozone generator. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0025] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0026] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0027] like Figures 3 to 5 As shown in the figure, this embodiment provides an oxygen generation device that saves regeneration gas, including a mounting base 5. A first adsorption-drying tower 6, a second adsorption-drying tower 7, a first oxygen-generating adsorption tower 8, and a second oxygen-generating adsorption tower 9 are fixedly mounted on the mounting base 5. The first adsorption-drying tower 6 is connected to the oxygen-generating main inlet pipe 10 via a first inlet branch pipe 11, and is connected to the exhaust port via a first exhaust branch pipe 12. The first adsorption-drying tower 6 is also connected to the first oxygen-generating adsorption tower 8 via a first inter-tower gas supply pipe 13. The second adsorption-drying tower... 7 is connected to the oxygen inlet main pipe 10 through the second inlet branch pipe 14, and the second adsorption drying tower 7 is connected to the exhaust port through the second exhaust branch pipe 15. The second adsorption drying tower 7 is also connected to the second oxygen adsorption tower 9 through the second inter-tower gas supply pipe 16. The first oxygen adsorption tower 8 is connected to the second oxygen adsorption tower 9 through the oxygen supply pipe, and the oxygen supply pipe is also connected to the oxygen outlet main pipe 19. At least one pneumatic valve is provided on the first inlet branch pipe 11, the second inlet branch pipe 14, the first exhaust branch pipe 12, the second exhaust branch pipe 15 and the oxygen supply pipe.

[0028] The oxygen production device that saves regeneration gas volume combines the first adsorption drying tower 6 and the first oxygen production adsorption tower 8 into one preparation group, and the second adsorption drying tower 7 and the second oxygen production adsorption tower 9 into another preparation group. The two preparation groups are switched at regular intervals according to a certain working cycle. When one preparation group is working, the other preparation group is regenerating, and the working cycles of the adsorption drying tower and the oxygen production adsorption tower are consistent. In operation, compressed air first enters the first adsorption drying tower 6 for moisture adsorption treatment. Then, the dried compressed air after treatment in the first adsorption drying tower 6 enters the first oxygen-generating adsorption tower 8. In the first oxygen-generating adsorption tower 8, nitrogen in the dried compressed air is adsorbed by molecular sieves, thus producing oxygen. The produced oxygen is delivered through one channel to the oxygen outlet manifold 19 and the other channel first enters the second oxygen-generating adsorption tower 9 to backflush the saturated nitrogen, thus regenerating the second oxygen-generating adsorption tower 9. Then, it enters the second adsorption drying tower 7 to backflush the saturated moisture, thus regenerating the second adsorption drying tower 7. Finally, it is discharged through the exhaust port. When the first adsorption drying tower 6 and the first oxygen-generating adsorption tower 8 complete one cycle, the second adsorption drying tower 7 and the second oxygen-generating adsorption tower 9 also complete regeneration. After that, the operation switches to the second adsorption drying tower 7 and the second oxygen-generating adsorption tower 9, while simultaneously regenerating the first adsorption drying tower 6 and the first oxygen-generating adsorption tower 8. This process is repeated.

[0029] In some embodiments, a first pneumatic valve 20 is provided on the first intake branch pipe 11, a second pneumatic valve 21 is provided on the second intake branch pipe 14, a third pneumatic valve 22 is provided on the first exhaust branch pipe 12, and a fourth pneumatic valve 23 is provided on the second exhaust branch pipe 15; the oxygen supply pipeline includes a first oxygen supply branch pipe 17 and a second oxygen supply branch pipe 18 connected to each other, the first oxygen-generating adsorption tower 8 is connected to the second oxygen-generating adsorption tower 9 through the first oxygen supply branch pipe 17 and the second oxygen supply branch pipe 18, the first oxygen-generating adsorption tower 8 is connected to the oxygen-generating outlet main pipe 19 through the first oxygen supply branch pipe 17, the second oxygen-generating adsorption tower 9 is connected to the oxygen-generating outlet main pipe 19 through the second oxygen supply branch pipe 18, and a fifth pneumatic valve 24 is provided on the first oxygen supply branch pipe 17, and a sixth pneumatic valve 25 is provided on the second oxygen supply branch pipe 18.

[0030] When the first adsorption drying tower 6 and the first oxygen-generating adsorption tower 8 are operating, and the second adsorption drying tower 7 and the second oxygen-generating adsorption tower 9 are regenerating, the first pneumatic valve 20, the fourth pneumatic valve 23, the fifth pneumatic valve 24, and the sixth pneumatic valve 25 are opened, and the second pneumatic valve 21 and the third pneumatic valve 22 are closed. Compressed air enters the first intake branch pipe 11 through the oxygen-generating main pipe 10, and is then transported to the first adsorption drying tower 6. After moisture adsorption treatment in the first adsorption drying tower 6, the dried compressed air is transported from the first adsorption drying tower 6 to the first oxygen-generating adsorption tower 8 through the first inter-tower air supply pipe 13, where it is dried. Nitrogen in the compressed air is adsorbed by the molecular sieve. The finished gas is discharged from the first oxygen-generating adsorption tower 8 and enters the first oxygen supply branch pipe 17. Then, it is divided into two paths: one path enters the oxygen-generating outlet main pipe 19, and the other path enters the second oxygen supply branch pipe 18. The second oxygen supply branch pipe 18 transports the gas to the second oxygen-generating adsorption tower 9, where the nitrogen saturated by adsorption is backflushed. The dry exhaust gas discharged from the second oxygen-generating adsorption tower 9 is transported to the second adsorption drying tower 7 through the second inter-tower air supply pipe 16, where the water saturated by adsorption in the second adsorption drying tower 7 is backflushed. Finally, the regenerated exhaust gas enters the second exhaust branch pipe 15 and is discharged from the exhaust port.

[0031] After reaching the set working cycle, the two preparation groups switch between working and regeneration states. Specifically, the second adsorption drying tower 7 and the second oxygen-generating adsorption tower 9 operate, while the first adsorption drying tower 6 and the first oxygen-generating adsorption tower 8 are regenerated. At this time, the second pneumatic valve 21, the third pneumatic valve 22, the fifth pneumatic valve 24, and the sixth pneumatic valve 25 are opened, while the first pneumatic valve 20 and the fourth pneumatic valve 23 are closed. Compressed air from the oxygen-generating main inlet pipe 10 enters the second inlet branch pipe 14 and is then transported to the second adsorption drying tower 7. After moisture adsorption treatment in the second adsorption drying tower 7, the dried compressed air is transported from the second adsorption drying tower 7 to the second oxygen-generating adsorption tower 8 through the second inter-tower air supply pipe 16. In the second oxygen-generating adsorption tower 9, nitrogen in the compressed air is adsorbed by a molecular sieve. The finished gas is discharged from the second oxygen-generating adsorption tower 9 and enters the second oxygen supply branch pipe 18. Then, it is divided into two paths: one path enters the oxygen-generating outlet main pipe 19, and the other path enters the first oxygen supply branch pipe 17. The first oxygen supply branch pipe 17 transports the gas to the first oxygen-generating adsorption tower 8, where the nitrogen saturated by adsorption is backflushed. The dried exhaust gas discharged from the first oxygen-generating adsorption tower 8 is transported to the first adsorption drying tower 6 through the first inter-tower air supply pipe 13, where the water saturated by adsorption in the first adsorption drying tower 6 is backflushed. Finally, the regenerated exhaust gas enters the first exhaust branch pipe 12 and is discharged from the exhaust port.

[0032] In some embodiments, the oxygen supply main pipe 19 is provided with a check valve 26 and a manual valve 27. The manual valve 27 controls the opening and closing of the oxygen supply main pipe 19, and the check valve 26 prevents oxygen from flowing back into the oxygen supply main pipe 19.

[0033] In some embodiments, a pressure equalization pipeline is further provided between the first adsorption drying tower 6 and the second adsorption drying tower 7. The first adsorption drying tower 6 is connected to the second adsorption drying tower 7 through the pressure equalization pipeline, and at least one pneumatic valve is provided on the pressure equalization pipeline. During the intermittent transition between the working and regeneration states of the two preparation groups, the pressure equalization pipeline can transport the residual finished product gas from the adsorption drying tower and oxygen-generating adsorption tower that have just finished working to the adsorption drying tower and oxygen-generating adsorption tower that have just finished regeneration and are ready to start working.

[0034] In some embodiments, a gas connection pipe 30 is provided between the pressure equalization pipe and the oxygen delivery pipe, and the pressure equalization pipe is connected to the oxygen delivery pipe through the gas connection pipe 30.

[0035] In some embodiments, the pressure equalization pipeline includes a first pressure equalization branch pipe 28 and a second pressure equalization branch pipe 29 connected to each other. The first adsorption drying tower 6 is connected to the second adsorption drying tower 7 through the first pressure equalization branch pipe 28 and the second pressure equalization branch pipe 29. A seventh pneumatic valve 31 is provided on the first pressure equalization branch pipe 28, and an eighth pneumatic valve 32 is provided on the second pressure equalization branch pipe 29. One end of the gas path connecting pipe 30 connected to the oxygen supply pipeline is located between the fifth pneumatic valve 24 and the sixth pneumatic valve 25, and the other end of the gas path connecting pipe 30 connected to the pressure equalization pipeline is located between the seventh pneumatic valve 31 and the eighth pneumatic valve 32.

[0036] At the same time as the adsorption cycle of the first adsorption drying tower 6 and the first oxygen-generating adsorption tower 8 ends, the regeneration cycle of the second adsorption drying tower 7 and the second oxygen-generating adsorption tower 9 also ends. At this point, the first pneumatic valve 20, the second pneumatic valve 21, the third pneumatic valve 22, and the fourth pneumatic valve 23 are closed, while the fifth pneumatic valve 24, the sixth pneumatic valve 25, the seventh pneumatic valve 31, and the eighth pneumatic valve 32 are opened. The remaining finished gas in the first adsorption drying tower 6 and the first oxygen-generating adsorption tower 8 enters the second adsorption drying tower 7 and the second oxygen-generating adsorption tower 9 through the equalization pipeline, the oxygen supply pipeline, and the gas connection pipeline 30, causing the pressure in the second adsorption drying tower 7 and the second oxygen-generating adsorption tower 9 to increase. Then, the second adsorption drying tower 7 and the second oxygen-generating adsorption tower 9 enter their adsorption cycle, and the first adsorption drying tower 6 and the first oxygen-generating adsorption tower 8 enter their regeneration cycle. When the second... When the adsorption cycle of adsorption drying tower 7 and the second oxygen-generating adsorption tower 9 ends, the regeneration cycle of the first adsorption drying tower 6 and the first oxygen-generating adsorption tower 8 also ends. The first pneumatic valve 20, the second pneumatic valve 21, the third pneumatic valve 22, and the fourth pneumatic valve 23 are closed, while the fifth pneumatic valve 24, the sixth pneumatic valve 25, the seventh pneumatic valve 31, and the eighth pneumatic valve 32 are opened. The remaining finished gas in the second adsorption drying tower 7 and the second oxygen-generating adsorption tower 9 enters the first adsorption drying tower 6 and the first oxygen-generating adsorption tower 8 through the equalization pipeline, the oxygen supply pipeline, and the gas connection pipeline 30, causing the first adsorption drying tower 6 and the first oxygen-generating adsorption tower 8 to be pressurized. After that, the first adsorption drying tower 6 and the first oxygen-generating adsorption tower 8 re-enter the adsorption cycle, and the second adsorption drying tower 7 and the second oxygen-generating adsorption tower 9 re-enter the regeneration cycle, and so on.

[0037] In some embodiments, the oxygen generation device that saves regeneration gas further includes an air storage tank 2 and an oxygen storage tank 4. The outlet of the air storage tank 2 is connected to one end of the oxygen generation inlet main pipe 10, and the other end of the oxygen generation inlet main pipe 10 is connected to the first inlet branch pipe 11 and the second inlet branch pipe 14. One end of the oxygen generation outlet main pipe 19 is connected to the oxygen delivery pipeline, and the other end of the oxygen generation outlet main pipe 19 is connected to the inlet of the oxygen storage tank 4. The air storage tank 2 delivers compressed air to the adsorption drying tower through the oxygen generation inlet main pipe 10, and the finished gas is delivered to the oxygen storage tank 4 for temporary storage through the oxygen generation outlet main pipe 19.

[0038] In some embodiments, the air storage tank 2 is equipped with a first vent valve 33, a pressure relief valve 34, and a first pressure gauge 35; the first oxygen adsorption tower 8 is equipped with a second pressure gauge 36; the second oxygen adsorption tower 9 is equipped with a third pressure gauge 37; and the oxygen storage tank 4 is equipped with a second vent valve 38 and a fourth pressure gauge 39. The vent valve can empty the air storage tank 2 and the oxygen storage tank 4 when they are not in use. The pressure relief valve 34 can reduce the pressure of the air storage tank 2 when the pressure is too high. The pressure gauges can realize real-time pressure detection of the air storage tank 2, the first oxygen adsorption tower 8, the second oxygen adsorption tower 9, and the oxygen storage tank 4.

[0039] Based on the above structure, this oxygen production device that saves regeneration gas is compact and small in size, enabling online oxygen production. Furthermore, it utilizes the regeneration exhaust gas from the oxygen production adsorption tower for the regeneration of the adsorption-drying tower. In other words, the gas used for regenerating the adsorption-drying tower is the drying exhaust gas discharged from the oxygen production adsorption tower. Compared to the traditional method of directly discharging the regeneration exhaust gas after regenerating the adsorption-drying tower with finished gas, this device achieves the reuse of the regeneration exhaust gas from the oxygen production adsorption tower, saving regeneration exhaust gas volume. Under the condition of a fixed oxygen demand, the device's operating energy consumption is significantly reduced. In addition, this oxygen production device that saves regeneration gas employs a single control system. Simultaneously, the working cycles of the adsorption-drying tower and the oxygen production adsorption tower are synchronized, greatly reducing the amount and volume of adsorption-drying agent filled in the first adsorption-drying tower 6 and the second adsorption-drying tower 7. This significantly reduces the device's footprint and investment cost, making it highly practical.

[0040] like Figures 3 to 6 As shown in the figure, this embodiment also discloses an ozone production system, including the oxygen generation device for saving regeneration gas as described above, and further including an air compressor 40, a compressed gas storage tank 41, a first filter 42, a freeze dryer 43, a second filter 44, an air storage tank 2, an oxygen storage tank 4, a third filter 45, and an ozone generator 46. The compressed gas storage tank 41 is located downstream of the air compressor 40 and is connected to the air compressor 40. The first filter 42 is located downstream of the compressed gas storage tank 41 and is connected to the compressed gas storage tank 41. The freeze dryer 43... 3 is located downstream of and connected to the first filter 42; the second filter 44 is located downstream of and connected to the freeze dryer 43; the air tank 2 is located downstream of and connected to the second filter 44; the outlet of the air tank 2 is connected to the oxygen inlet main pipe 10; the inlet of the oxygen tank 4 is connected to the oxygen outlet main pipe 19; the third filter 45 is located downstream of and connected to the oxygen tank 4; and the ozone generator 46 is located downstream of and connected to the third filter 45.

[0041] The air outlet of the air compressor 40 is connected to the air inlet of the compressed air storage tank 41. There are two first filters 42, which are connected in parallel and series. The air outlet of the compressed air storage tank 41 is connected to the air inlet of one of the first filters 42, and the air outlet of the other first filter 42 is connected to the air inlet of the freeze dryer 43. The air outlet of the freeze dryer 43 is connected to the air inlet of the second filter 44, and the air outlet of the second filter 44 is connected to the air inlet of the air storage tank 2. There are two third filters 45, which are connected in parallel and series. The air outlet of the oxygen storage tank 4 is connected to the air inlet of one of the third filters 45, and the air outlet of the other third filter 45 is connected to the air inlet of the ozone generator 46.

[0042] In this ozone generation system, the air compressor 40 generates compressed air, which is then temporarily stored in a compressed air storage tank 41. The compressed air then enters a first filter 42 for primary and secondary filtration. Afterward, it enters a freeze dryer 43 for moisture removal, and then a second filter 44 for tertiary filtration. After passing through the second filter 44, the compressed air enters an air storage tank 2 for temporary storage. From the air storage tank 2, it enters an oxygen generator to produce oxygen. The produced oxygen is then temporarily stored in an oxygen storage tank 4, and subsequently enters a third filter 45 for quaternary and quinary filtration. Finally, the oxygen is delivered to an ozone generator 46, where ozone is generated.

[0043] Based on the above structure, this ozone preparation system effectively reuses the dried waste gas discharged from the oxygen adsorption tower by saving regeneration gas volume, thereby reducing the amount of gas required for the device and saving 13%-15% of the system's gas volume. This not only significantly reduces the energy consumption of the oxygen generator but also reduces the exhaust volume of the air compressor 40 by 13%-15%, thus greatly reducing the energy consumption of the air compressor 40. Alternatively, a smaller, lower-energy-consumption air compressor 40 can be selected. Compared to traditional ozone preparation equipment, this ozone preparation system significantly reduces energy consumption while producing the same amount of ozone, and also occupies a smaller area, resulting in lower investment and operating costs.

[0044] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. Furthermore, it should be understood that after reading the technical description of this utility model, those skilled in the art can make various alterations, modifications, and / or variations to this utility model, and all such equivalent forms also fall within the scope of protection defined by the appended claims.

Claims

1. An oxygen generation device that saves regeneration gas, characterized in that, Includes a mounting base, on which a first adsorption drying tower, a second adsorption drying tower, a first oxygen-generating adsorption tower, and a second oxygen-generating adsorption tower are fixedly mounted; The first adsorption drying tower is connected to the oxygen production air intake main pipe through the first air intake branch pipe, the first adsorption drying tower is connected to the exhaust port through the first exhaust branch pipe, and the first adsorption drying tower is connected to the first oxygen production adsorption tower through the first inter-tower air supply pipe. The second adsorption drying tower is connected to the oxygen production air intake main pipe through the second air intake branch pipe, the second adsorption drying tower is connected to the exhaust port through the second exhaust branch pipe, and the second adsorption drying tower is connected to the second oxygen production adsorption tower through the second inter-tower air supply pipe. The first oxygen-generating adsorption tower is connected to the second oxygen-generating adsorption tower through an oxygen supply pipeline, and the oxygen supply pipeline is also connected to an oxygen-generating outlet main pipe. At least one pneumatic valve is provided on the first air intake branch pipe, the second air intake branch pipe, the first exhaust branch pipe, the second exhaust branch pipe, and the oxygen supply pipeline. A check valve and a manual valve are provided on the main oxygen supply pipe.

2. The oxygen generator for saving regeneration gas volume according to claim 1, characterized in that, The first intake branch pipe is equipped with a first pneumatic valve, the second intake branch pipe is equipped with a second pneumatic valve, the first exhaust branch pipe is equipped with a third pneumatic valve, and the second exhaust branch pipe is equipped with a fourth pneumatic valve. The oxygen supply pipeline includes a first oxygen supply branch pipe and a second oxygen supply branch pipe that are connected to each other. The first oxygen-generating adsorption tower is connected to the second oxygen-generating adsorption tower through the first oxygen supply branch pipe and the second oxygen supply branch pipe. The first oxygen-generating adsorption tower is connected to the oxygen-generating gas outlet main pipe through the first oxygen supply branch pipe. The second oxygen-generating adsorption tower is connected to the oxygen-generating gas outlet main pipe through the second oxygen supply branch pipe. A fifth pneumatic valve is provided on the first oxygen supply branch pipe, and a sixth pneumatic valve is provided on the second oxygen supply branch pipe.

3. The oxygen generator for saving regeneration gas volume according to claim 2, characterized in that, A pressure equalization pipeline is also provided between the first adsorption drying tower and the second adsorption drying tower. The first adsorption drying tower is connected to the second adsorption drying tower through the pressure equalization pipeline, and at least one pneumatic valve is provided on the pressure equalization pipeline.

4. The oxygen generator for saving regeneration gas volume according to claim 3, characterized in that, A gas connection pipe is provided between the pressure equalization pipe and the oxygen delivery pipe, and the pressure equalization pipe is connected to the oxygen delivery pipe through the gas connection pipe.

5. The oxygen generator for saving regeneration gas volume according to claim 4, characterized in that, The pressure equalization pipeline includes a first pressure equalization branch pipe and a second pressure equalization branch pipe that are connected to each other. The first adsorption drying tower is connected to the second adsorption drying tower through the first pressure equalization branch pipe and the second pressure equalization branch pipe. A seventh pneumatic valve is provided on the first pressure equalization branch pipe and an eighth pneumatic valve is provided on the second pressure equalization branch pipe. One end of the gas connection pipe that connects to the oxygen delivery pipe is located between the fifth pneumatic valve and the sixth pneumatic valve, and the other end of the gas connection pipe that connects to the pressure equalization pipe is located between the seventh pneumatic valve and the eighth pneumatic valve.

6. The oxygen generation device for saving regeneration gas volume according to any one of claims 1-5, characterized in that, It also includes an air storage tank and an oxygen storage tank. The air outlet of the air storage tank is connected to one end of the oxygen inlet main pipe, and the other end of the oxygen inlet main pipe is connected to the first inlet branch pipe and the second inlet branch pipe. One end of the oxygen outlet main pipe is connected to the oxygen delivery pipeline, and the other end of the oxygen outlet main pipe is connected to the air inlet of the oxygen storage tank.

7. The oxygen generator for saving regeneration gas volume according to claim 6, characterized in that, The air storage tank is equipped with a first vent valve, a first pressure relief valve and a first pressure gauge; the first oxygen adsorption tower is equipped with a second pressure gauge; the second oxygen adsorption tower is equipped with a third pressure gauge; and the oxygen storage tank is equipped with a second vent valve, a second pressure relief valve and a fourth pressure gauge.

8. An ozone generation system, characterized in that, The oxygen generation device for saving regenerated gas as described in claim 1 further includes an air compressor, a compressed gas storage tank, a first filter, a refrigerated dryer, a second filter, an air storage tank, an oxygen storage tank, a third filter, and an ozone generator. The compressed gas storage tank is located downstream of and connected to the air compressor. The first filter is located downstream of and connected to the compressed gas storage tank. The refrigerated dryer is located downstream of and connected to the first filter. The second filter is located downstream of and connected to the refrigerated dryer. The air storage tank is located downstream of and connected to the second filter. The outlet of the air storage tank is connected to the oxygen generation inlet main pipe. The inlet of the oxygen storage tank is connected to the oxygen generation outlet main pipe. The third filter is located downstream of and connected to the oxygen storage tank. The ozone generator is located downstream of and connected to the third filter.

9. The ozone generation system according to claim 8, characterized in that, The air compressor outlet is connected to the compressed air tank inlet. Two first filters are provided, connected in parallel and series. The compressed air tank outlet is connected to the inlet of one of the first filters, and the outlet of the other first filter is connected to the inlet of the freeze dryer. The freeze dryer outlet is connected to the inlet of the second filter, and the outlet of the second filter is connected to the inlet of the air tank. Two third filters are provided, connected in parallel and series. The oxygen tank outlet is connected to the inlet of one of the third filters, and the outlet of the other third filter is connected to the inlet of the ozone generator.

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