CN114560444A - Oxygen recovery system and recovery method for ozone oxidation device - Google Patents
Oxygen recovery system and recovery method for ozone oxidation device Download PDFInfo
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- CN114560444A CN114560444A CN202210117566.7A CN202210117566A CN114560444A CN 114560444 A CN114560444 A CN 114560444A CN 202210117566 A CN202210117566 A CN 202210117566A CN 114560444 A CN114560444 A CN 114560444A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/10—Preparation of ozone
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/02—Preparation of oxygen
- C01B13/0203—Preparation of oxygen from inorganic compounds
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/02—Preparation of oxygen
- C01B13/0229—Purification or separation processes
- C01B13/0288—Combined chemical and physical processing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention relates to the technical field of chemical industry environmental protection, in particular to an oxygen recovery system for an ozone oxidation device. Liquid oxygen in the system is vaporized by a vaporizer and then enters an ozone generator, and the ozone generator discharges the vaporized liquid oxygen to form ozone and oxygen mixed gas; then enters an ozone oxidizer; mixing the oxygen tail gas containing a small amount of ozone discharged from the top of the ozone oxidizer with dry oxygen dried and adsorbed by a dry adsorber, and then introducing the mixture into an ozone destructor, wherein under the action of a catalyst, ozone in the tail gas is decomposed into oxygen; the tail gas passing through the ozone destructor is pressurized by a compressor and then enters a drying adsorber for secondary drying; the dried ozone destructor tail gas is mixed with the clean oxygen of the drying absorber and then enters the ozone generator to start the next cycle. The invention can reduce the consumption of oxygen in the existing ozone oxidizer, improve the utilization rate of the oxygen, improve the destruction rate of ozone and reduce the pollution of ozone emission to the environment.
Description
Technical Field
The invention relates to the technical field of chemical industry, in particular to an oxygen recovery system and a recovery method for an ozone oxidation device.
Background
Ozone oxidation is widely applied to the fields of drinking water, municipal wastewater, industrial sewage, printing and dyeing wastewater, industrial oxidation and the like as an efficient and green water treatment technology. The existing ozone oxidation system generally comprises a liquid oxygen vaporizer, an ozone generator, an ozone oxidizer and a tail gas destructor, and has the following problems in operation: the tail gas out of the ozone oxidizer enters an ozone destructor, and the running effect of the ozone destructor is generally poor due to various reasons; 2. the tail gas from the ozone oxidizer is directly discharged to the atmosphere after being destroyed by the tail gas, which not only causes the waste of oxygen resources, but also can cause the destruction to the environment because the ozone destructor has poor effect, so that the discharged tail gas contains ozone. 3. Because oxygen is not recovered, the operation cost of a factory is high, and the profitability is reduced.
Disclosure of the invention
In order to achieve the purpose, the invention provides the following technical scheme:
an oxygen recovery system for an ozonation device comprising:
the device comprises a vaporizer, an ozone generator, an ozone oxidizer, an ozone destructor, a compressor, a drying adsorber A and a drying adsorber B;
the system is characterized in that liquid oxygen in the system is vaporized through a vaporizer, the vaporizer is communicated with an ozone generator, and the ozone generator is connected with the ozone oxidizer; the liquid oxygen is vaporized by a vaporizer and then enters an ozone generator, and the ozone generator generates a mixed gas of ozone and oxygen; the mixed gas of ozone and oxygen enters an ozone oxidizer; mixing the oxygen tail gas containing a small amount of ozone discharged from the top of the ozone oxidizer with the dry oxygen adsorbed in the two-stage dry air of the dry adsorber A and the dry adsorber B, and then feeding the mixture into an ozone destructor, wherein the small amount of ozone in the tail gas is decomposed into oxygen under the action of a catalyst; the tail gas passing through the ozone destructor is pressurized by a compressor and then enters a drying adsorber A and a drying adsorber B for secondary drying, and moisture and other impurities are removed under the action of a drying adsorbent; and mixing the dried tail gas of the ozone destructor, the dry adsorber A and the dry adsorber B with the clean oxygen regenerated and adsorbed from the air, and then entering an ozone generator to start the next cycle.
The invention also provides a recovery method of the oxygen recovery system for the ozone oxidation device, which comprises the following steps:
s1, vaporizing the liquid oxygen by a vaporizer and then feeding the liquid oxygen into an ozone generator;
s2, generating a mixed gas of ozone and oxygen by an ozone generator;
s3, the mixed gas of ozone and oxygen enters an ozone oxidizer;
s4, mixing the oxygen tail gas containing ozone discharged from the top of the ozone oxidizer with the dry oxygen absorbed in the two-stage dry air of the dry absorber, and then feeding the mixture into an ozone destructor, wherein the ozone in the tail gas is decomposed into oxygen under the action of a catalyst;
s5, pressurizing the tail gas passing through the ozone destructor by a compressor, then entering a drying adsorber for secondary drying, and removing moisture and other impurities under the action of a drying adsorbent;
and S6, mixing the tail gas of the dried ozone destructor and the clean oxygen regenerated and adsorbed by the drying adsorber from the air, and feeding the mixture serving as a supplementary oxygen source into an ozone generator to regenerate the mixed gas of ozone and oxygen.
Furthermore, the oxygen recovery system also comprises a heating regenerator, and clean oxygen of external air enters the drying adsorber A and the drying adsorber B for adsorption drying after passing through the heating regenerator.
Furthermore, the concentration of the mixed oxygen entering the ozone generator is not lower than 90 percent, the dew point is not lower than minus 60 ℃, and the mixed oxygen does not contain organic gas.
Furthermore, the ozone oxidizer is closed, and the operating pressure is in the range of 0-50 kPaG.
Furthermore, a defoaming and dewatering facility is arranged before the tail gas out of the ozone oxidizer enters the ozone destructor.
Further, the relative humidity of the tail gas entering the ozone destructor is not greater than 80%.
Further, the outlet pressure of the compressor is not less than 0.15 MPaG.
Further, the drying adsorber a and the drying adsorber B are connected in parallel.
Compared with the prior art, the beneficial effects of the invention are that: 1. according to the invention, the oxygen after drying and adsorption is mixed with the tail gas of the ozone oxidizer, so that the water content of the tail gas is reduced, the running time of the ozone destructor is longer, and the effect is better.
2. The invention purifies the tail gas of the ozone oxidation device by various adsorbents, pressurizes the tail gas by the compressor, recycles the oxygen after reaction in the ozone oxidation process, and re-enters the ozone generator as an oxygen supplement gas source, thereby reducing the production cost of ozone and improving the utilization rate of the oxygen.
3. The invention ensures the effective operation of other adsorption devices when the single adsorption dryer is regenerated by the combination of the double (multiple) adsorption dryers, thereby ensuring the continuous operation of the device.
Drawings
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is a schematic system structure according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a conventional system of comparative example 1.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention and the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention.
Example 1
As shown in fig. 1, an oxygen recovery system for an ozone oxidation apparatus of the present embodiment includes:
the device comprises a vaporizer, an ozone generator, an ozone oxidizer, an ozone destructor, a compressor, a drying adsorber A and a drying adsorber B;
the liquid oxygen in the system is vaporized through a vaporizer, the vaporizer is communicated with an ozone generator, and the ozone generator is connected with the ozone oxidizer; the liquid oxygen is vaporized by a vaporizer and then enters an ozone generator, and the ozone generator generates a mixed gas of ozone and oxygen; the mixed gas of ozone and oxygen enters an ozone oxidizer; mixing the oxygen tail gas containing a small amount of ozone discharged from the top of the ozone oxidizer with the dry oxygen adsorbed in the two-stage dry air of the dry adsorber A and the dry adsorber B, and then feeding the mixture into an ozone destructor, wherein the small amount of ozone in the tail gas is decomposed into oxygen under the action of a catalyst; the tail gas passing through the ozone destructor is pressurized by a compressor and then enters a drying adsorber A and a drying adsorber B for secondary drying, and moisture and other impurities are removed under the action of a drying adsorbent; and mixing the dried tail gas of the ozone destructor, the dry adsorber A and the dry adsorber B with the clean oxygen regenerated and adsorbed from the air, and then entering an ozone generator to start the next cycle.
The oxygen recovery system also comprises a heating regenerator, and clean oxygen of external air enters the drying adsorber A and the drying adsorber B for adsorption drying after passing through the heating regenerator.
Specifically, the concentration of the mixed oxygen entering the ozone generator is not lower than 90%, the dew point is not lower than-60 ℃, and the mixed oxygen does not contain organic gas. The ozone oxidizer is closed, and the operating pressure range is 0-50 kPaG. The tail gas out of the ozone oxidizer is provided with a defoaming and dewatering facility before entering the ozone destructor. The relative humidity of the tail gas entering the ozone destructor is not more than 80%. The outlet pressure of the compressor is not less than 0.15 MPaG. The drying adsorber A and the drying adsorber B are connected in parallel.
During specific work, liquid oxygen is vaporized by a vaporizer and then enters an ozone generator, and the ozone generator discharges the vaporized liquid oxygen to form ozone and oxygen mixed gas; the mixed gas of ozone and oxygen enters an ozone oxidizer; mixing the oxygen tail gas containing a small amount of ozone discharged from the top of the ozone oxidizer with the dry oxygen from the two-stage drying adsorption of the drying adsorber A and the drying adsorber B, then entering an ozone destructor, and decomposing the ozone in the tail gas into oxygen under the action of a catalyst; the tail gas passing through the ozone destructor is pressurized by a compressor and then enters a drying adsorber A and a drying adsorber B for secondary drying, and moisture and other impurities are removed under the action of a drying adsorbent; and mixing the tail gas of the dried ozone destructor with the clean oxygen of the drying absorber A and the drying absorber B, and then entering the ozone generator to start the next cycle.
According to the invention, the oxygen after drying and adsorption is mixed with the tail gas of the ozone oxidizer, so that the water content of the tail gas is reduced, the running time of the ozone destructor is longer, and the effect is better.
The tail gas of the ozone oxidation device is purified through various adsorbents, the tail gas is pressurized through a compressor, and oxygen reacted in the ozone oxidation process is recycled and used as an oxygen supplement gas source to enter the ozone generator again, so that the production cost of ozone is reduced, and the oxygen utilization rate is improved.
The combination of the double (multiple) adsorption dryers ensures the effective operation of other adsorption devices during the regeneration of the single adsorption dryer, thereby ensuring the continuous operation of the device.
And an oxygen content detector and a flowmeter are arranged in a pipeline behind the drying adsorber and in front of the ozone generator. When the oxygen content does not reach the standard, the gas passes through the drying adsorber again for purification until the purity requirement required by the gas entering the ozone generator is met.
The invention recycles the oxygen reacted in the ozone consumption process through the combination of the compressor and the adsorption dryer, and the oxygen is used as an oxygen supplement gas source to enter the ozone generator again, thereby reducing the production cost of ozone and improving the utilization rate of oxygen.
Example 2
The embodiment provides a recovery method of an oxygen recovery system for an ozone oxidation device, which comprises the following steps:
s1, vaporizing the liquid oxygen by a vaporizer and then feeding the vaporized liquid oxygen into an ozone generator;
s2, generating a mixed gas of ozone and oxygen by an ozone generator;
s3, the mixed gas of ozone and oxygen enters an ozone oxidizer;
s4, mixing the oxygen tail gas containing ozone discharged from the top of the ozone oxidizer with the dry oxygen absorbed in the two-stage dry air of the dry absorber, and then feeding the mixture into an ozone destructor, wherein the ozone in the tail gas is decomposed into oxygen under the action of a catalyst;
s5, pressurizing the tail gas passing through the ozone destructor by a compressor, then entering a drying adsorber for secondary drying, and removing moisture and other impurities under the action of a drying adsorbent;
and S6, mixing the dried tail gas of the ozone destructor with the clean oxygen regenerated and adsorbed from the air by the drying adsorber, and feeding the mixture as a supplementary oxygen source into the ozone generator to regenerate the mixed gas of ozone and oxygen.
Comparative example 1
As shown in FIG. 2, the flow of the ozone generating device of the prior art of this embodiment is
The liquid oxygen is vaporized by a vaporizer and then enters an ozone generator, the ozone generator generates mixed gas of ozone and oxygen, the mixed gas is discharged into a heater through an oxidation tower, the mixed gas enters an ozone destructor after being heated, the ozone in the tail gas is decomposed into oxygen under the action of a catalyst, and the residual gas and the oxygen are directly discharged into the atmosphere.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the present invention as defined in the accompanying claims.
Claims (9)
1. An oxygen recovery system for an ozonation device comprising:
the device comprises a vaporizer, an ozone generator, an ozone oxidizer, an ozone destructor, a compressor, a drying adsorber A and a drying adsorber B;
the system is characterized in that liquid oxygen in the system is vaporized through a vaporizer, the vaporizer is communicated with an ozone generator, and the ozone generator is connected with an ozone oxidizer; the liquid oxygen is vaporized by the vaporizer and then enters the ozone generator, and the ozone generator generates mixed gas of ozone and oxygen; the mixed gas of the ozone and the oxygen enters an ozone oxidizer; mixing oxygen tail gas containing a small amount of ozone discharged from the top of the ozone oxidizer with dry oxygen adsorbed from two-stage dry air of a dry adsorber A and a dry adsorber B, and then feeding the mixture into an ozone destructor, wherein the small amount of ozone in the tail gas is decomposed into oxygen under the action of a catalyst; the tail gas passing through the ozone destructor is pressurized by a compressor and then enters a drying adsorber A and a drying adsorber B for secondary drying, and moisture and other impurities are removed under the action of a drying adsorbent; and mixing the dried tail gas of the ozone destructor, the dry adsorber A and the dry adsorber B with the clean oxygen regenerated and adsorbed from the air, and then entering an ozone generator to start the next cycle.
2. A method of recovering an oxygen recovery system for an ozone oxidation unit, comprising the steps of:
s1, vaporizing the liquid oxygen by a vaporizer and then feeding the liquid oxygen into an ozone generator;
s2, generating a mixed gas of ozone and oxygen by an ozone generator;
s3, the mixed gas of ozone and oxygen enters an ozone oxidizer;
s4, mixing the oxygen tail gas containing ozone discharged from the top of the ozone oxidizer with the dry oxygen absorbed in the two-stage dry air of the dry absorber, and then feeding the mixture into an ozone destructor, wherein the ozone in the tail gas is decomposed into oxygen under the action of a catalyst;
s5, pressurizing the tail gas passing through the ozone destructor by a compressor, then entering a drying adsorber for secondary drying, and removing moisture and other impurities under the action of a drying adsorbent;
and S6, mixing the dried tail gas of the ozone destructor with the clean oxygen regenerated and adsorbed from the air by the drying adsorber, and feeding the mixture as a supplementary oxygen source into the ozone generator to regenerate the mixed gas of ozone and oxygen.
3. The oxygen recovery system for an ozonation device according to claim 1, further comprising a heating regenerator, wherein clean oxygen of outside air passes through the heating regenerator and enters the dry adsorber a and the dry adsorber B for adsorption drying.
4. The oxygen recovery system for an ozonation device according to claim 1, wherein the concentration of the mixed oxygen entering the ozone generator is not lower than 90%, the dew point is not lower than-60 ℃, and no organic gas is contained.
5. The oxygen recovery system for an ozonation device of claim 1, wherein the ozonator is closed, operating at a pressure in the range of 0-50 kPaG.
6. The oxygen recovery system for an ozone oxidation unit as claimed in claim 1, wherein the tail gas exiting the ozone oxidation unit is provided with a de-foaming and de-watering facility before entering the ozone destructor.
7. The oxygen recovery system for an ozone oxidation unit as claimed in claim 1, wherein the relative humidity of the off-gas entering the ozone destructor is no greater than 80%.
8. The oxygen recovery system for an ozonation device of claim 1, wherein an outlet pressure of the compressor is not less than 0.15 MPaG.
9. The oxygen recovery system for an ozonation device of claim 1, wherein the dry adsorber a and the dry adsorber B are connected in parallel.
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| CN202210117566.7A CN114560444A (en) | 2022-02-08 | 2022-02-08 | Oxygen recovery system and recovery method for ozone oxidation device |
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| CN202210117566.7A CN114560444A (en) | 2022-02-08 | 2022-02-08 | Oxygen recovery system and recovery method for ozone oxidation device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0262449A2 (en) * | 1986-09-27 | 1988-04-06 | Ozonia AG | Process for producing ozone |
| US20040028576A1 (en) * | 2002-04-25 | 2004-02-12 | The Boc Group Inc. | Ozone production processes |
| CN102049177A (en) * | 2009-11-02 | 2011-05-11 | 上海一鸣过滤技术有限公司 | Deep drying process with compressed air |
| CN106145047A (en) * | 2015-03-26 | 2016-11-23 | 苏州清然环保科技有限公司 | The system and method that ozone preparation and circulation of tail gas utilize |
| CN106865736A (en) * | 2015-12-11 | 2017-06-20 | 中国石油天然气股份有限公司 | A kind of processing method and processing device of industrial wastewater |
| CN107720927A (en) * | 2017-10-17 | 2018-02-23 | 上海市政工程设计研究总院（集团）有限公司 | A kind of catalytic ozonation and comprehensive utilization system for tail-gas |
-
2022
- 2022-02-08 CN CN202210117566.7A patent/CN114560444A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0262449A2 (en) * | 1986-09-27 | 1988-04-06 | Ozonia AG | Process for producing ozone |
| US20040028576A1 (en) * | 2002-04-25 | 2004-02-12 | The Boc Group Inc. | Ozone production processes |
| CN102049177A (en) * | 2009-11-02 | 2011-05-11 | 上海一鸣过滤技术有限公司 | Deep drying process with compressed air |
| CN106145047A (en) * | 2015-03-26 | 2016-11-23 | 苏州清然环保科技有限公司 | The system and method that ozone preparation and circulation of tail gas utilize |
| CN106865736A (en) * | 2015-12-11 | 2017-06-20 | 中国石油天然气股份有限公司 | A kind of processing method and processing device of industrial wastewater |
| CN107720927A (en) * | 2017-10-17 | 2018-02-23 | 上海市政工程设计研究总院（集团）有限公司 | A kind of catalytic ozonation and comprehensive utilization system for tail-gas |
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Effective date of registration: 20221110 Address after: 230000 in the high tech Industrial Development Zone, No. 669, Changjiang West Road, Hefei City, Anhui Province Applicant after: EAST CHINA ENGINEERING SCIENCE AND TECHNOLOGY Co.,Ltd. Applicant after: CHINA NATIONAL CHEMICAL ENGINEERING Co.,Ltd. Address before: 230000 in the high tech Industrial Development Zone, No. 669, Changjiang West Road, Hefei City, Anhui Province Applicant before: EAST CHINA ENGINEERING SCIENCE AND TECHNOLOGY Co.,Ltd. |