CN215326939U

CN215326939U - Air oxygen sweeps formula ozone separation pressure swing adsorption system in turn

Info

Publication number: CN215326939U
Application number: CN202121492277.2U
Authority: CN
Inventors: 石伟; 王杰; 张文静
Original assignee: Everbright Water Technology Development Nanjing Co ltd
Current assignee: Everbright Water Technology Development Nanjing Co ltd
Priority date: 2021-07-01
Filing date: 2021-07-01
Publication date: 2021-12-28
Anticipated expiration: 2031-07-01

Abstract

The utility model discloses an air and oxygen alternative purging type ozone separation pressure swing adsorption system, and belongs to the technical field of ozone separation. The device comprises an air inlet pipeline, N groups of adsorption towers, an oxygen purging pipeline and an air outlet pipeline; the air inlet pipeline is used for introducing mixed gas containing ozone; each adsorption tower comprises an adsorption tower port I and an adsorption tower port II; the port I of the adsorption tower is connected with an air inlet pipeline, and a valve is arranged on the connected pipeline; n is more than or equal to 1; each group of the adsorption towers at least comprises an adsorption tower A and an adsorption tower B; the port I of the adsorption tower A is connected with an air inlet pipeline, and the port II of the adsorption tower A is connected with the port II of the adsorption tower B through an oxygen purging pipeline; and the port I of the adsorption tower B is connected with an air outlet pipeline, and a vacuum pump is arranged on the air outlet pipeline. The utility model can recover more than 65% of oxygen and increase the concentration of the produced ozone to more than 50%.

Description

Air oxygen sweeps formula ozone separation pressure swing adsorption system in turn

Technical Field

The utility model belongs to the technical field of ozone separation, and particularly relates to an air and oxygen alternative purging type ozone separation pressure swing adsorption system.

Background

The ozone oxidation technology is widely applied to drinking water, municipal sewage, industrial wastewater treatment, food processing, marine product processing and the like due to the advantages of strong oxidizability, high reaction speed, no secondary pollution under normal conditions and the like, and the installed capacity is larger and larger. The ozone is generally prepared by a high-frequency discharge method, and in order to improve the discharge efficiency and prolong the service life of an ozone generator, the oxygen concentration is generally required to be more than 95 percent, and the dew point temperature is required to be lower than minus 60 ℃. Liquid oxygen with the concentration of 99.9 percent prepared by a cryogenic method or oxygen with the concentration of about 93 percent prepared by an on-site PSA and VPSA method is generally adopted as raw material gas of the ozone generator in industry. But is limited by the existing ozone generation technology, the effective utilization rate of oxygen is only about 10%, about 90% of oxygen and ozone enter the rear-end dissolved air together, the oxygen cost is greatly increased, and the air dissolving difficulty is increased.

Upon retrieval, chinese patent invention 201680091548.9 discloses a method for separating ozone from a mixture of oxygen and ozone by feeding the mixture to at least one adsorption bed containing an adsorbent material for adsorbing ozone; the adsorption bed may be one of four adsorption beds in a continuous adsorption cycle, producing ozone by recycling unadsorbed oxygen to an ozone generator with supplemental oxygen or using it as a purge gas; an external purge gas is used to desorb ozone into the consumer process; with four beds, most of the time, two beds are in adsorption mode while the other two beds are in regeneration/production mode. Although this patent can utilize unadsorbed oxygen and supplementary oxygen to sweep the ozone in the adsorption tower once more, owing to do not adopt vacuum desorption, can't improve ozone concentration, sweep that gaseous quantity is great, and the ozone separation system in this patent is different at the different stages retrieval and utilization oxygen volumes of a cycle in addition, need carry out more meticulous regulation to the oxygen compressor, and ozone concentration fluctuates greatly.

Also, for example, chinese patent 201710659064.6 discloses a three-tower vacuum pressure swing adsorption oxygen generation system, where a corresponding product gas transition tank is provided corresponding to each adsorption tower, the front-stage high-oxygen-concentration portion of the product gas produced in each adsorption oxygen generation process of the adsorption tower enters a product gas buffer tank as the product gas of the oxygen generation system, the rear-stage low-oxygen-concentration portion resides in the product gas transition tank according to the gradient of the oxygen concentration produced by the adsorption tower, and when the corresponding adsorption tower is shifted to the step of increasing the pressure of the product gas, the product gas is used as the pressure-increasing gas to increase the pressure of the reflux adsorption tower. The patent utilizes the product gas in the oxygen production process as the product of the oxygen production system, improves the oxygen concentration of the product gas, the use efficiency of the adsorbent and the oxygen recovery rate of the system, but does not mention ozone and can not be applied to an ozone generation system to prepare high-concentration ozone mixed gas.

Therefore, there is a need to design an ozone generating system or method with high oxygen utilization rate and high ozone concentration in the generated gas.

SUMMERY OF THE UTILITY MODEL

1. Problems to be solved

Aiming at the problems of low oxygen utilization rate, low ozone concentration in produced gas and large ozone concentration fluctuation of an ozone generation system or method in the prior art, the utility model provides an air-oxygen alternative purging type ozone separation pressure swing adsorption system; through reasonably arranging the oxygen purging pipeline and the connection relation between the oxygen purging pipeline and other pipelines and the adsorption tower connected with the oxygen purging pipeline, the problems of low oxygen utilization rate, low ozone concentration in generated gas and large ozone concentration fluctuation are effectively solved.

Technical scheme

In order to solve the problems, the technical scheme adopted by the utility model is as follows:

the utility model relates to an air-oxygen alternative purging type ozone separation pressure swing adsorption system which comprises an air inlet pipeline, N groups of adsorption towers, an oxygen purging pipeline and an air outlet pipeline; the air inlet pipeline is used for introducing mixed gas containing ozone; each adsorption tower comprises an adsorption tower port I and an adsorption tower port II; the port I of the adsorption tower is connected with an air inlet pipeline, and a valve is arranged on the connected pipeline; n is more than or equal to 1; each group of the adsorption towers at least comprises an adsorption tower A and an adsorption tower B; the port I of the adsorption tower A is connected with an air inlet pipeline, and the port II of the adsorption tower A is connected with the port II of the adsorption tower B through an oxygen purging pipeline; the adsorption tower port I of the adsorption tower B is connected with an air outlet pipeline, a vacuum pump is arranged on the air outlet pipeline, and the adsorption tower port II of the adsorption tower B is connected with an air pipeline; the vacuum pump of the present invention is different from the vacuum pump used in the conventional ozone separation system, and includes a water ring vacuum pump or a jet pump.

Preferably, said N = 3; the adsorption tower comprises a first adsorption tower, a second adsorption tower, a third adsorption tower, a fourth adsorption tower, a fifth adsorption tower and a sixth adsorption tower.

Preferably, an air outlet valve and a vacuum pump are arranged on the air outlet pipeline; the gas outlet pipeline is respectively connected with a first adsorption tower port I, a second adsorption tower port I, a third adsorption tower port I, a fourth adsorption tower port I, a fifth adsorption tower port I and a sixth adsorption tower port I, and a first adsorption tower valve II, a second adsorption tower valve II, a third adsorption tower valve II, a fourth adsorption tower valve II, a fifth adsorption tower valve II and a sixth adsorption tower valve II are respectively arranged on the connected pipelines.

Preferably, an air inlet valve is arranged on the air inlet pipeline; the air inlet pipeline is respectively connected with a first adsorption tower port I, a second adsorption tower port I, a third adsorption tower port I, a fourth adsorption tower port I, a fifth adsorption tower port I and a sixth adsorption tower port I, and a first adsorption tower valve I, a second adsorption tower valve I, a third adsorption tower valve I, a fourth adsorption tower valve I, a fifth adsorption tower valve I and a sixth adsorption tower valve I are respectively arranged on the connected pipelines.

Preferably, the first adsorption tower port II is connected with the second adsorption tower port II through a first oxygen purging pipeline, the third adsorption tower port II is connected with the fourth adsorption tower port II through a second oxygen purging pipeline, and the fifth adsorption tower port II is connected with the sixth adsorption tower port II through a third oxygen purging pipeline; the first oxygen purging pipeline is provided with a first purging valve, the second oxygen purging pipeline is provided with a second purging valve, and the third oxygen purging pipeline is provided with a third purging valve.

Preferably, the device further comprises an exhaust pipeline; the exhaust pipeline is respectively connected with a first adsorption tower port II, a second adsorption tower port II, a third adsorption tower port II, a fourth adsorption tower port II, a fifth adsorption tower port II and a sixth adsorption tower port II, and a first adsorption tower valve III, a second adsorption tower valve III, a third adsorption tower valve III, a fourth adsorption tower valve III, a fifth adsorption tower valve III and a sixth adsorption tower valve III are respectively arranged on the connected pipelines;

preferably, the air inlet end of the air pipeline is an air inlet end; the air pipeline is provided with an air compressor, and the air compressor is used for pumping air into the ozone separation pressure swing adsorption system; the air pipeline is respectively connected with the first adsorption tower port II, the second adsorption tower port II, the third adsorption tower port II, the fourth adsorption tower port II, the fifth adsorption tower port II and the sixth adsorption tower port II, and a first adsorption tower valve IV, a second adsorption tower valve IV, a third adsorption tower valve IV, a fourth adsorption tower valve IV, a fifth adsorption tower valve IV and a sixth adsorption tower valve IV are respectively arranged on the connected pipelines. The ozone separation system can also avoid the influence of the nitrogen gas remained in the adsorption tower by air purging on the concentration of the recycled oxygen gas, and the nitrogen gas remained by the air purging can be discharged from the air outlet pipeline together with the high-concentration ozone by the oxygen purging for the rear end, thereby not only solving the problem of nitrogen gas residue, but also ensuring the concentration of the ozone gas.

Preferably, the device also comprises a liquid oxygen tank and an ozone generator; the liquid oxygen tank comprises a liquid oxygen output end; the ozone generator comprises a generator input end and a generator output end, the generator input end is connected with the liquid oxygen output end through the gasifier, and the generator output end is connected with the air inlet pipeline; and the port II of the adsorption tower is connected with the input end of the generator, and an oxygen compressor is arranged on a pipeline connected with the port II of the adsorption tower.

Preferably, the device also comprises a standby pipeline, wherein the standby pipeline connects the air inlet pipeline with the air outlet pipeline, and a standby valve is arranged on the standby pipeline; and the air outlet end of the air outlet pipeline is provided with a main air outlet valve.

The utility model relates to an ozone separation pressure swing adsorption method, which is based on an air-oxygen alternative purging type ozone separation pressure swing adsorption system, and performs cycle operation on each group of adsorption towers, wherein each cycle in the cycle operation comprises an operation I, an operation II, an operation III and an operation IV; the operation I comprises the following steps: introducing the mixed gas containing ozone into an adsorption tower A from an adsorption tower port I through an air inlet pipeline, and adsorbing the ozone in the mixed gas; meanwhile, air is introduced into the adsorption tower B from the port II of the adsorption tower through an air pipeline to purge the ozone adsorption saturated molecular sieve in the adsorption tower B, and the purged outlet air is discharged for use through an air outlet pipeline; the operation II comprises the following steps: the adsorption tower A continues to operate the adsorption operation in the step I, the outlet gas is introduced into the adsorption tower B from the port II of the adsorption tower through an oxygen purging pipeline, the ozone and the air in the adsorption tower B are purged, and the purged outlet gas is discharged for use through an outlet gas pipeline; the operation III comprises the following steps: introducing the mixed gas containing ozone into an adsorption tower B from an adsorption tower port I through an air inlet pipeline, and adsorbing the ozone in the mixed gas; simultaneously, air is introduced into the adsorption tower A from the port II of the adsorption tower through an air pipeline to purge the ozone adsorption saturated molecular sieve in the adsorption tower A, and the purged outlet air is discharged for use through an air outlet pipeline; the operation IV is as follows: the adsorption tower B continues to operate the adsorption operation in the step III, the outlet gas is introduced into the adsorption tower A from the port II of the adsorption tower through an oxygen purging pipeline, the ozone and the air in the adsorption tower A are purged, and the purged outlet gas is discharged for use through an outlet gas pipeline; the operation sequence of each adsorption tower in a single circulation is the same; and the operation II and the operation IV are carried out for the same time. The utility model can match the circulating operation of each group of adsorption towers in the ozone generation system, so that the adsorption towers are in seamless connection with the ozone separation pressure swing adsorption system, and the oxygen generated in the adsorption process of other adsorption towers can be continuously utilized to purge the ozone in the target adsorption tower, thereby continuously generating high-concentration ozone mixed gas for the rear end to use.

Preferably, the number of the adsorption towers is 6; the cycle of each cycle operation is T =2 min-6 min, and operation I with the time of T/3, operation II with the time of T/6, operation III with the time of T/3 and operation IV with the time of T/6 are sequentially carried out in each cycle according to the time sequence; the starting time of the single cycle operation of each group of adsorption towers is delayed by T/6 relative to that of the previous group of adsorption towers.

Preferably, the adsorption tower A comprises a first adsorption tower, and the adsorption tower B comprises a second adsorption tower; the single-cycle specific operation steps of the first adsorption tower and the second adsorption tower are as follows:

(1) opening a first adsorption tower valve I, a first adsorption tower valve III, a second adsorption tower valve II and a second adsorption tower valve IV, closing the rest valves of the first adsorption tower and the second adsorption tower and a first purge valve, and performing operation I;

(2) opening a first adsorption tower valve I, a second adsorption tower valve II and a first purge valve, closing the other valves of the first adsorption tower and the second adsorption tower, and performing operation II;

(3) opening a second adsorption tower valve I, a second adsorption tower valve III, a first adsorption tower valve II and a first adsorption tower valve IV, closing the rest valves of the first adsorption tower and the second adsorption tower and a first purge valve, and performing operation III;

(4) and opening a second adsorption tower valve I, a first adsorption tower valve II and a first purge valve, closing the rest valves of the first adsorption tower and the second adsorption tower, and performing operation IV. Taking the first adsorption tower and the second adsorption tower as an example, the operation steps of the rest of the adsorption towers are similar, and the main difference is that the specific valves for opening and closing the rest of the adsorption towers are different, and the specific valves for opening and closing the rest of the adsorption towers correspond to the positions of the valves of the first adsorption tower and the second adsorption tower, for example: the first adsorption tower valve II corresponds to the third adsorption tower valve II and the fifth adsorption tower valve II, and the second adsorption tower valve II corresponds to the fourth adsorption tower valve II and the sixth adsorption tower valve II.

3. Advantageous effects

Compared with the prior art, the utility model has the beneficial effects that:

(1) the utility model relates to an air-oxygen alternative purging type ozone separation pressure swing adsorption system, which comprises an air inlet pipeline, 3N groups of adsorption towers, an oxygen purging pipeline and an air outlet pipeline; the air inlet pipeline is used for introducing mixed gas containing ozone; each adsorption tower comprises an adsorption tower port I and an adsorption tower port II; the port I of the adsorption tower is connected with an air inlet pipeline, and a valve is arranged on the connected pipeline; n is more than or equal to 1; each group of the adsorption towers at least comprises an adsorption tower A and an adsorption tower B; the port I of the adsorption tower A is connected with an air inlet pipeline, and the port II of the adsorption tower A is connected with the port II of the adsorption tower B through an oxygen purging pipeline; the adsorption tower port I of the adsorption tower B is connected with an air outlet pipeline, a vacuum pump is arranged on the air outlet pipeline, and the adsorption tower port II of the adsorption tower B is connected with an air pipeline; through the arrangement, the adsorption tower connected with the air inlet pipeline can adsorb the introduced ozone-containing mixed gas, the adsorbed ozone can be stored in the adsorption tower, when the adsorption tower B finishes adsorption and needs to desorb the ozone, oxygen generated in the adsorption process of the adsorption tower A can be used for purging ozone in the adsorption tower B through an oxygen purging pipeline, meanwhile, a vacuum pump on an air outlet pipeline is used for performing negative pressure desorption on the ozone in the adsorption tower B, the vacuum pump of the utility model can ensure that the temperature of the desorbed ozone is almost unchanged, avoid the decomposition of the ozone, thereby discharging the high-concentration ozone mixed gas which is blown out from the gas outlet pipeline for the rear end to use, effectively improving the ozone concentration in the produced gas of the ozone separation pressure swing adsorption system, in addition, the oxygen purging can also purge the air and discharge the residual nitrogen in the adsorption tower, so as to improve the concentration of the recycled oxygen; therefore, the ozone generating system can utilize the oxygen generated by other adsorption towers to blow the adsorption tower needing to desorb the ozone, and simultaneously utilize the vacuum pump to desorb the ozone in the adsorption tower, so that the oxygen can be finally recovered by more than 65 percent under the combined action of the oxygen and the ozone, the concentration of the produced ozone is improved to more than 50 percent, the gas dissolving cost is saved, and the efficiency is improved.

Drawings

FIG. 1 is a schematic diagram I of an ozone separation pressure swing adsorption system of the present invention;

FIG. 2 is a schematic diagram II of an ozone separation pressure swing adsorption system of the present invention;

FIG. 3 is a view showing the state of each adsorption column in the present invention.

In the figure:

100. a first adsorption tower; 101. a first adsorption tower port I; 102. a first adsorption tower port II; 110. a first adsorption tower valve I; 120. a first adsorption tower valve II; 130. a first adsorption tower valve III; 140. a first adsorption tower valve IV;

200. a second adsorption column; 201. a second adsorption tower port I; 202. a second adsorption tower port II; 210. a second adsorption tower valve I; 220. a second adsorption tower valve II; 230. a second adsorption tower valve III; 240. a second adsorption tower valve IV;

300. a third adsorption column; 301. a third adsorption tower port I; 302. a third adsorption tower port II; 310. a third adsorption tower valve I; 320. a third adsorption tower valve II; 330. a third adsorption tower valve III; 340. a third adsorption tower valve IV;

400. a fourth adsorption column; 401. a fourth adsorption tower port I; 402. a fourth adsorption tower port II; 410. a fourth adsorption tower valve I; 420. a fourth adsorption tower valve II; 430. a fourth adsorption tower valve III; 440. a fourth adsorption tower valve IV;

500. a fifth adsorption column; 501. a fifth adsorption tower port I; 502. a fifth adsorption tower port II; 510. a fifth adsorption tower valve I; 520. a fifth adsorption tower valve II; 530. a fifth adsorption tower valve III; 540. a fifth adsorption tower valve IV;

600. a sixth adsorption column; 601. a sixth adsorption tower port I; 602. a sixth adsorption tower port II; 610. a sixth adsorption tower valve I; 620. a sixth adsorption tower valve II; 630. a sixth adsorption tower valve III; 640. a sixth adsorption tower valve IV;

710. a first oxygen purge line; 711. a first purge valve; 720. a second oxygen purge line; 721. a second purge valve; 730. a third oxygen purge line; 731. a third purge valve;

810. a liquid oxygen tank; 811. a liquid oxygen output end; 820. an ozone generator; 821. a generator input; 822. a generator output; 830. an oxygen compressor;

910. an air intake line; 911. an intake valve; 920. an air outlet pipeline; 921. a vacuum pump; 922. an air outlet valve; 923. a main gas outlet valve; 930. a standby pipeline; 931. a standby valve; 940. an exhaust line; 950. an air line; 951. an air compressor; 952. an air inlet port.

Detailed Description

The following detailed description of exemplary embodiments of the utility model refers to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration exemplary embodiments in which the utility model may be practiced, and in which features of the utility model are identified by reference numerals. The following more detailed description of the embodiments of the utility model is not intended to limit the scope of the utility model, as claimed, but is presented for purposes of illustration only and not limitation to describe the features and characteristics of the utility model, to set forth the best mode of carrying out the utility model, and to sufficiently enable one skilled in the art to practice the utility model. It will, however, be understood that various modifications and changes may be made without departing from the scope of the utility model as defined in the appended claims. The detailed description and drawings are to be regarded as illustrative rather than restrictive, and any such modifications and variations are intended to be included within the scope of the present invention as described herein. Furthermore, the background is intended to be illustrative of the state of the art as developed and the meaning of the present technology and is not intended to limit the scope of the utility model or the application and field of application of the utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model; as used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The utility model is further described with reference to specific examples.

Example 1

As shown in fig. 1-2, the present embodiment provides an air-oxygen alternative purging type ozone separation pressure swing adsorption system, which includes an air pipeline 950, an exhaust pipeline 940, an air inlet pipeline 910, 3 groups of adsorption towers, an oxygen purging pipeline, and an air outlet pipeline 920; the air inlet pipeline 910 is used for introducing mixed gas containing ozone; each adsorption tower comprises an adsorption tower port I and an adsorption tower port II; the port I of the adsorption tower is connected with an air inlet pipeline 910, and a valve is arranged on the connected pipeline; each group of the adsorption towers at least comprises an adsorption tower A and an adsorption tower B; the port I of the adsorption tower A is connected with an air inlet pipeline 910, the port II of the adsorption tower A is connected with the port II of the adsorption tower B through an oxygen purging pipeline, and the port I of the adsorption tower B is connected with an air outlet pipeline 920; the adsorption towers include a first adsorption tower 100, a second adsorption tower 200, a third adsorption tower 300, a fourth adsorption tower 400, a fifth adsorption tower 500, and a sixth adsorption tower 600. In this embodiment, each adsorption tower, the pipeline, and the valve are made of 316L material resistant to ozone corrosion, and a special molecular sieve capable of selectively adsorbing ozone is filled in the adsorption tower, and the molecular sieve has high stability and does not react with ozone and oxygen.

It should be noted that the adsorption column a and the adsorption column B in this embodiment refer to the classification of adsorption columns having different connection modes or operation modes at a certain time, and do not mean that the adsorption column a is always the adsorption column a at any time; for example, as shown in FIG. 3, in the time period of 0T/6, the adsorption tower A comprises a first adsorption tower 100, the adsorption tower B comprises a second adsorption tower 200, and in the time period of 3T/6T, the adsorption tower A comprises the second adsorption tower 200, and the adsorption tower B comprises the first adsorption tower 100; the situation of the adsorption towers of the other groups is analogized.

In this embodiment, an air outlet valve 922 and a vacuum pump 921 are disposed on the air outlet pipeline 920, and the vacuum pump 921 in this embodiment is a water ring vacuum pump; the discharged gas pipeline 920 is respectively connected with a first adsorption tower port I101, a second adsorption tower port I201, a third adsorption tower port I301, a fourth adsorption tower port I401, a fifth adsorption tower port I501 and a sixth adsorption tower port I601, and the connected pipelines are respectively provided with a first adsorption tower valve II 120, a second adsorption tower valve II 220, a third adsorption tower valve II 320, a fourth adsorption tower valve II 420, a fifth adsorption tower valve II 520 and a sixth adsorption tower valve II 620.

An air inlet valve 911 is arranged on the air inlet pipeline 910; the air inlet pipeline 910 is respectively connected with a first adsorption tower port I101, a second adsorption tower port I201, a third adsorption tower port I301, a fourth adsorption tower port I401, a fifth adsorption tower port I501 and a sixth adsorption tower port I601, and the connected pipelines are respectively provided with a first adsorption tower valve I110, a second adsorption tower valve I210, a third adsorption tower valve I310, a fourth adsorption tower valve I410, a fifth adsorption tower valve I510 and a sixth adsorption tower valve I610.

The first adsorption tower port II 102 is connected with a second adsorption tower port II 202 through a first oxygen purging pipeline 710, the third adsorption tower port II 302 is connected with a fourth adsorption tower port II 402 through a second oxygen purging pipeline 720, and the fifth adsorption tower port II 502 is connected with a sixth adsorption tower port II 602 through a third oxygen purging pipeline 730; the first oxygen purging pipeline 710 is provided with a first purging valve 711, the second oxygen purging pipeline 720 is provided with a second purging valve 721, and the third oxygen purging pipeline 730 is provided with a third purging valve 731.

The exhaust pipeline 940 is respectively connected with the first adsorption tower port II 102, the second adsorption tower port II 202, the third adsorption tower port II 302, the fourth adsorption tower port II 402, the fifth adsorption tower port II 502 and the sixth adsorption tower port II 602, and the connected pipelines are respectively provided with a first adsorption tower valve III 130, a second adsorption tower valve III 230, a third adsorption tower valve III 330, a fourth adsorption tower valve III 430, a fifth adsorption tower valve III 530 and a sixth adsorption tower valve III 630;

the air inlet end of the air pipeline 950 is an air inlet end 952, and in addition, the desorption air is filtered, dedusted and dried before entering the adsorption tower, and the dew point temperature reaches below-65 ℃; an air compressor 951 is arranged on the air pipeline 950, and the air compressor 951 is used for pumping air into the ozone generation system; the air pipeline 950 is respectively connected with the first adsorption tower port II 102, the second adsorption tower port II 202, the third adsorption tower port II 302, the fourth adsorption tower port II 402, the fifth adsorption tower port II 502 and the sixth adsorption tower port II 602, and the connected pipelines are respectively provided with a first adsorption tower valve IV 140, a second adsorption tower valve IV 240, a third adsorption tower valve IV 340, a fourth adsorption tower valve IV 440, a fifth adsorption tower valve IV 540 and a sixth adsorption tower valve IV 640.

Also comprises a liquid oxygen tank 810 and an ozone generator 820; the liquid oxygen tank 810 comprises a liquid oxygen output 811; the ozone generator 820 comprises a generator input end 821 and a generator output end 822, the generator input end 821 is connected with the liquid oxygen output end 811, and the generator output end 822 is connected with the air inlet pipeline 910; the port II of the adsorption tower is connected with the input end 821 of the generator, an oxygen compressor 830 is arranged on a connected pipeline, and an ozone destructor and an emergency discharge pipeline are arranged in front of the oxygen compressor 830; the system also comprises a standby pipeline 930, wherein the standby pipeline 930 connects the air inlet pipeline 910 with the air outlet pipeline 920, and a standby valve 931 is arranged on the standby pipeline 930; a main gas outlet valve 923 is arranged at the gas outlet end of the gas outlet pipeline 920; the standby pipeline 930 can cut out the adsorption tower at any time when the system needs to be maintained, so that the original liquid oxygen system is recovered, and the continuous output of ozone is ensured.

The present embodiment also provides an ozone separation pressure swing adsorption method, based on the air-oxygen alternating purging type ozone separation pressure swing adsorption system described in the present embodiment, each group of adsorption towers is cyclically operated, as shown in fig. 3, a cycle of each cyclic operation is T =4 min; each cycle in the cycle operation comprises an operation I, an operation II, an operation III and an operation IV; here, taking the first adsorption tower 100 as an example:

(1) operation I: opening a first adsorption tower valve I110, a first adsorption tower valve III 130, a second adsorption tower valve II 220 and a second adsorption tower valve IV 240, closing the other valves of the first adsorption tower 100 and the second adsorption tower 200 and a first purge valve 711, introducing the mixed gas containing ozone into an adsorption tower A from an adsorption tower port I through an air inlet pipeline 910, and adsorbing the ozone in the mixed gas; meanwhile, air is introduced into the adsorption tower B from the port II of the adsorption tower through an air pipeline 950 to purge the ozone adsorption saturated molecular sieve in the adsorption tower B, and the purged air is discharged for use through an air outlet pipeline 920; the running time is T/3;

(2) and operation II: opening a first adsorption tower valve I110, a second adsorption tower valve II 220 and a first purging valve 711, closing the rest valves of the first adsorption tower 100 and the second adsorption tower 200, continuing the adsorption operation in the adsorption tower A, introducing the outlet gas into an adsorption tower B from an adsorption tower port II through an oxygen purging pipeline, purging ozone and air in the adsorption tower B, and discharging the purged outlet gas through an outlet gas pipeline 920 for use; the running time is T/6;

(3) operation III: opening a second adsorption tower valve I210, a second adsorption tower valve III 230, a first adsorption tower valve II 120 and a first adsorption tower valve IV 140, closing the other valves of the first adsorption tower 100 and the second adsorption tower 200 and a first purge valve 711, introducing the mixed gas containing ozone into an adsorption tower B from an adsorption tower port I through an air inlet pipeline 910, and adsorbing the ozone in the mixed gas; meanwhile, air is introduced into the adsorption tower A from the port II of the adsorption tower through an air pipeline 950 to purge the ozone adsorption saturated molecular sieve in the adsorption tower A, and the purged air is discharged for use through an air outlet pipeline 920; the running time is T/3;

(4) operation IV: opening a second adsorption tower valve I210, a first adsorption tower valve II 120 and a first purging valve 711, closing the rest valves of the first adsorption tower 100 and the second adsorption tower 200, continuing the adsorption operation in the operation III of the adsorption tower B, introducing the outlet gas into the adsorption tower A from an adsorption tower port II through an oxygen purging pipeline, purging ozone and air in the adsorption tower A, and discharging the purged outlet gas through an outlet gas pipeline 920 for use; the running time is T/6;

the operation sequence of each adsorption tower in a single circulation is the same; and the operation II and the operation IV are carried out for the same time.

The steps (1) to (4) are only taken as an example of the first adsorption tower 100 and the second adsorption tower 200, the operation flows of the other groups of adsorption towers are similar, and the operation sequence of each adsorption tower in a single cycle is the same; the time of the operation II is the same as that of the operation IV; the main difference is that the start time of the single cycle operation of each group of adsorption columns is delayed by T/6 relative to the last adsorption column. Therefore, if the operation time of each group of adsorption towers is compared, each group of adsorption towers comprises operations I-IV, except that the later group of adsorption towers is delayed by T/6 relative to the former group of adsorption towers, in the embodiment, the third adsorption tower (300) and the fourth adsorption tower (400) are the later group of adsorption towers of the first adsorption tower (100) and the second adsorption tower (200), and the rest are similar, and the delay T/6 is understood as delay T/6+ nT or advance by 5T/6+ nT, and n is any integer; if the running states of 6 adsorption towers at a certain moment are compared, it can be seen that the adsorption towers are operated II and operated IV at any moment, which shows that oxygen generated by purging of other adsorption towers operated II is used for purging the target adsorption tower at any moment, so that the operation IV of the target adsorption tower is used for generating ozone mixed gas with higher concentration, and therefore, the whole time axis is traversed, and continuous oxygen purging is realized to generate high-concentration ozone.

More specifically, although exemplary embodiments of the utility model have been described herein, the utility model is not limited to these embodiments, but includes any and all embodiments modified, omitted, combined, e.g., between various embodiments, adapted and/or substituted, as would be recognized by those skilled in the art from the foregoing detailed description. The limitations in the claims are to be interpreted broadly based the language employed in the claims and not limited to examples described in the foregoing detailed description or during the prosecution of the application, which examples are to be construed as non-exclusive. Any steps recited in any method or process claims may be executed in any order and are not limited to the order presented in the claims. The scope of the utility model should, therefore, be determined only by the appended claims and their legal equivalents, rather than by the descriptions and examples given above.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control. When a concentration, temperature, time, or other value or parameter is expressed as a range, preferred range, or as a range defined by a list of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. For example, a range of 1 to 50 should be understood to include any number, combination of numbers, or subrange selected from 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, or 50, and all fractional values between the above integers, e.g., 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, and 1.9. With respect to sub-ranges, specifically consider "nested sub-ranges" that extend from any endpoint within the range. For example, nested sub-ranges of exemplary ranges 1-50 may include 1-10, 1-20, 1-30, and 1-40 in one direction, or 50-40, 50-30, 50-20, and 50-10 in another direction.

Claims

1. An air-oxygen alternative purging type ozone separation pressure swing adsorption system is characterized by comprising an air inlet pipeline (910), N groups of adsorption towers, an oxygen purging pipeline, an air pipeline (950) and an air outlet pipeline (920); the air inlet pipeline (910) is used for introducing mixed gas containing ozone; each adsorption tower comprises an adsorption tower port I and an adsorption tower port II; the port I of the adsorption tower is connected with an air inlet pipeline (910), and a valve is arranged on the connected pipeline; n is more than or equal to 1;

each group of the adsorption towers at least comprises an adsorption tower A and an adsorption tower B; the port I of the adsorption tower A is connected with an air inlet pipeline (910), and the port II of the adsorption tower A is connected with the port II of the adsorption tower B through an oxygen purging pipeline; adsorption tower B's adsorption tower port I links to each other with gas outlet pipe way (920), be equipped with vacuum pump (921) on gas outlet pipe way (920), adsorption tower B's adsorption tower port II links to each other with air pipeline (950).

2. The air-oxygen alternating purge ozone separation pressure swing adsorption system of claim 1, wherein N-3; the adsorption tower comprises a first adsorption tower (100), a second adsorption tower (200), a third adsorption tower (300), a fourth adsorption tower (400), a fifth adsorption tower (500) and a sixth adsorption tower (600).

3. The air-oxygen alternating purging type ozone separation pressure swing adsorption system of claim 2, wherein an air outlet valve (922) is arranged on the air outlet pipeline (920); the gas outlet pipeline (920) is respectively connected with a first adsorption tower port I (101), a second adsorption tower port I (201), a third adsorption tower port I (301), a fourth adsorption tower port I (401), a fifth adsorption tower port I (501) and a sixth adsorption tower port I (601), and the connected pipelines are respectively provided with a first adsorption tower valve II (120), a second adsorption tower valve II (220), a third adsorption tower valve II (320), a fourth adsorption tower valve II (420), a fifth adsorption tower valve II (520) and a sixth adsorption tower valve II (620).

4. The air-oxygen alternating purging type ozone separation pressure swing adsorption system according to claim 2, wherein an air inlet valve (911) is arranged on the air inlet pipeline (910); the air inlet pipeline (910) is respectively connected with the first adsorption tower port I (101), the second adsorption tower port I (201), the third adsorption tower port I (301), the fourth adsorption tower port I (401), the fifth adsorption tower port I (501) and the sixth adsorption tower port I (601), and the connected pipelines are respectively provided with a first adsorption tower valve I (110), a second adsorption tower valve I (210), a third adsorption tower valve I (310), a fourth adsorption tower valve I (410), a fifth adsorption tower valve I (510) and a sixth adsorption tower valve I (610).

5. The air-oxygen alternating purging type ozone separation pressure swing adsorption system of claim 2, wherein the first adsorption tower port II (102) is connected with the second adsorption tower port II (202) through a first oxygen purging pipeline (710), the third adsorption tower port II (302) is connected with the fourth adsorption tower port II (402) through a second oxygen purging pipeline (720), and the fifth adsorption tower port II (502) is connected with the sixth adsorption tower port II (602) through a third oxygen purging pipeline (730); a first purging valve (711) is arranged on the first oxygen purging pipeline (710), a second purging valve (721) is arranged on the second oxygen purging pipeline (720), and a third purging valve (731) is arranged on the third oxygen purging pipeline (730).

6. An air-oxygen alternating purge ozone separation pressure swing adsorption system according to claim 1, further comprising a vent line (940); the exhaust pipeline (940) is respectively connected with the first adsorption tower port II (102), the second adsorption tower port II (202), the third adsorption tower port II (302), the fourth adsorption tower port II (402), the fifth adsorption tower port II (502) and the sixth adsorption tower port II (602), and the connected pipelines are respectively provided with a first adsorption tower valve III (130), a second adsorption tower valve III (230), a third adsorption tower valve III (330), a fourth adsorption tower valve III (430), a fifth adsorption tower valve III (530) and a sixth adsorption tower valve III (630).

7. An air-oxygen alternating purge ozone separation pressure swing adsorption system as claimed in claim 1 wherein the air inlet end of the air line (950) is an air inlet end (952); and an air compressor (951) is arranged on the air pipeline (950), and the air compressor (951) is used for pumping air into the ozone separation pressure swing adsorption system.

8. The air-oxygen alternating purging type ozone separation pressure swing adsorption system as claimed in claim 7, wherein the air pipeline (950) is connected to the first adsorption tower port II (102), the second adsorption tower port II (202), the third adsorption tower port II (302), the fourth adsorption tower port II (402), the fifth adsorption tower port II (502), and the sixth adsorption tower port II (602), and the connected pipelines are provided with the first adsorption tower valve IV (140), the second adsorption tower valve IV (240), the third adsorption tower valve IV (340), the fourth adsorption tower valve IV (440), the fifth adsorption tower valve IV (540), and the sixth adsorption tower valve IV (640), respectively.

9. An air-oxygen alternating purging type ozone separation pressure swing adsorption system according to any one of claims 1 to 8, characterized by further comprising a liquid oxygen tank (810) and an ozone generator (820); the liquid oxygen tank (810) comprises a liquid oxygen output end (811); the ozone generator (820) comprises a generator input end (821) and a generator output end (822), the generator input end (821) is connected with the liquid oxygen output end (811) through the gasifier, and the generator output end (822) is connected with the air inlet pipeline (910); and the port II of the adsorption tower is connected with the input end (821) of the generator, and an oxygen compressor (830) is arranged on a connected pipeline.

10. An air-oxygen alternating purging type ozone separation pressure swing adsorption system according to claim 9, further comprising a backup pipeline (930), wherein the backup pipeline (930) connects the inlet pipeline (910) and the outlet pipeline (920), and a backup valve (931) is disposed on the backup pipeline (930); the gas outlet end of the gas outlet pipeline (920) is provided with a main gas outlet valve (923).