Ozone recovery system

Abstract

The present invention provides an ozone recovery and utilization system, which includes: a tail gas destroyer, a tail gas collection tank, a tail gas purification device and an ozone generator; the tail gas destroyer is connected to the tail gas collection tank and the tail gas purification device, the tail gas purification device purifies the gas from the tail gas destroyer, and a secondary utilization loop is formed between the tail gas purification device and the tail gas collection tank, and the tail gas purification device is also connected to the downstream ozone generator. The present invention can recycle ozone, which first destroys the ozone, catalytically reduces the ozone to oxygen, and then performs cooling, pressurization, removal of harmful impurities and other processes to purify the oxygen to meet the requirements of the ozone generator, and then mixes it with fresh oxygen to enter the ozone generator to prepare ozone, so as to achieve recycling.

Description

Technical Field

[0001] The invention relates to the technical field of tail gas treatment, and in particular to an ozone recovery and utilization system. Background Art

[0002] In industrial production and life, a lot of industrial and domestic wastewater is generated. At present, the industrial and domestic wastewater generated needs to be treated physically, chemically and biologically through corresponding water treatment processes. In the water treatment process, one of the steps is to catalyze the wastewater through ozone. However, the actual utilization rate of ozone in the actual process is low, which results in a large waste. Therefore, it is necessary to propose further solutions to the above problems. Summary of the invention

[0003] The purpose of the present invention is to provide an ozone recovery and utilization system to overcome the deficiencies in the prior art.

[0004] To achieve the above-mentioned purpose, the present invention provides an ozone recovery and utilization system, which includes: an exhaust gas destroyer, an exhaust gas collection tank, an exhaust gas purification device and an ozone generator;

[0005] The exhaust gas destroyer passes through the exhaust gas collecting tank and the exhaust gas purification device, the exhaust gas purification device purifies the gas from the exhaust gas destroyer, and a secondary utilization loop is formed between the exhaust gas purification device and the exhaust gas collecting tank. The exhaust gas purification device is also connected to the ozone generator downstream.

[0006] As an improvement of the ozone recovery and utilization system of the present invention, the bottom of the tail gas collection tank is connected to the integrated drainer via a control valve.

[0007] As an improvement of the ozone recovery and utilization system of the present invention, the tail gas purification device includes: a heat exchange and pressurization unit, a filtration and absorption unit, and an oxygen purification unit;

[0008] The heat exchange and pressurization unit, the filtering and absorbing unit and the oxygen purification unit are sequentially arranged between the tail gas collecting tank and the ozone generator, and the oxygen purification unit is also connected to the tail gas collecting tank through a pipeline.

[0009] As an improvement of the ozone recovery and utilization system of the present invention, the ozone recovery and utilization system further includes a circulating cooling water delivery pipeline of the heat exchange and pressurization unit.

[0010] As an improvement of the ozone recovery and utilization system of the present invention, the heat exchange and pressurization unit comprises: a heat exchanger, an oxygen compressor and a condenser;

[0011] The heat exchanger, oxygen compressor and condenser are arranged in sequence between the tail gas collecting tank and the filtering and absorbing unit, and the oxygen compressor and condenser are also connected to the tail gas collecting tank through a pipeline.

[0012] As an improvement of the ozone recovery and utilization system of the present invention, a frequency converter is further provided between the tail gas collection tank and the oxygen compressor.

[0013] As an improvement of the ozone recovery and utilization system of the present invention, the filtering and absorption unit comprises: a filter group and a harmful gas absorption tower;

[0014] The filter group includes a plurality of filters arranged in series, and the plurality of filters are respectively connected to the outlet end at the bottom of the tail gas collection tank through pipelines.

[0015] As an improvement of the ozone recovery and utilization system of the present invention, the oxygen purification unit includes: a moisture removal adsorption tower and / or a purification adsorption tower.

[0016] As an improvement of the ozone recovery and utilization system of the present invention, the ozone recovery and utilization system further includes a pure gas buffer tank disposed between the tail gas purification device and the ozone generator.

[0017] As an improvement of the ozone recovery and utilization system of the present invention, the ozone recovery and utilization system further comprises an electrical control device, and each valve in the ozone recovery and utilization system is controlled by the electrical control device.

[0018] Compared with the prior art, the present invention has the following beneficial effects: the present invention can recycle ozone by first destroying the ozone, catalytically reducing the ozone to convert it into oxygen, and then performing processes such as cooling, pressurizing, and removing harmful impurities to purify the oxygen to conditions that meet the requirements of the ozone generator, and then mixing it with fresh oxygen to enter the ozone generator to prepare ozone for recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of an ozone recovery and utilization system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0021] The present invention is described in detail below in conjunction with various embodiments, but it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in the field based on these embodiments are all within the scope of protection of the present invention.

[0022] like Figure 1 As shown, an embodiment of the present invention provides an ozone recovery and utilization system, which includes: a tail gas destroyer 10, a tail gas collection tank 20, a tail gas purification device 30 and an ozone generator 40.

[0023] The tail gas destroyer 10 is used to destroy ozone and catalytically reduce ozone into oxygen. Specifically, a temperature rise unit and a catalytic unit are built into the tail gas destroyer 10. Among them, the temperature rise unit is used to heat the ozone tail gas and increase the temperature of the ozone tail gas to avoid affecting the catalyst. The catalytic unit is used to catalyze the ozone tail gas after the temperature rise, so that it is decomposed into oxygen under the action of the corresponding catalyst. The tail gas destroyer 10 is connected to the tail gas purification device 30 via the tail gas collection tank 20. The tail gas purification device 30 is also connected to the downstream ozone generator 40.

[0024] The tail gas collecting tank 20 is used to collect the destroyed tail gas. At the same time, the bottom of the tail gas collecting tank 20 is connected to the integrated drainer 50 through a control valve.

[0025] The exhaust gas purification device 30 purifies the gas from the exhaust gas destroyer 10 , and a secondary utilization loop is formed between the exhaust gas purification device 30 and the exhaust gas collecting tank 20 .

[0026] Specifically, the tail gas purification device 30 includes: a heat exchange and pressurization unit 31, a filter and absorption unit 32, and an oxygen purification unit 33. The heat exchange and pressurization unit 31, the filter and absorption unit 32, and the oxygen purification unit 33 are sequentially arranged between the tail gas collection tank 20 and the ozone generator 40.

[0027] The heat exchange and pressurization unit 31 is used to achieve cooling, pressurization and other treatments. The heat exchange and pressurization unit 31 includes: a heat exchanger 311, an oxygen compressor 312 and a condenser 313. Among them, the heat exchanger 311, the oxygen compressor 312 and the condenser 313 are sequentially arranged between the tail gas collection tank 20 and the filter absorption unit 32. The heat exchanger 311 and the condenser 313 both have an inlet and an outlet for circulating cooling water. Accordingly, the ozone recovery and utilization system also includes a circulating cooling water delivery pipeline 60 for the heat exchanger 311 and the condenser 313.

[0028] In addition, in order to facilitate the control of the working frequency of the oxygen compressor 312, a frequency converter 70 is also provided between the tail gas collection tank 20 and the oxygen compressor 312. The oxygen compressor 312 and the condenser 313 are also connected to the tail gas collection tank 20 through a pipeline 80, thus forming a secondary utilization loop between the tail gas purification device 30 and the tail gas collection tank 20.

[0029] The heat exchanger 311 , the oxygen compressor 312 and the condenser 313 may be existing products. Those skilled in the art may select products of corresponding models according to their needs and apply them in combination in this embodiment.

[0030] The filtering and absorbing unit 32 is used to remove harmful impurities in the tail gas. The filtering and absorbing unit 32 includes: a filter group 321 and a harmful gas absorption tower 322. Among them, the filter group 321 includes a plurality of filters arranged in series, and the plurality of filters are respectively connected to the outlet end at the bottom of the tail gas collection tank 20 through pipelines. The harmful gas absorption tower 322 is filled with fillers that can absorb harmful gases, so that the two-stage purification of the filter group 321 and the harmful gas absorption tower 322 is conducive to removing harmful impurities in the tail gas. The selection of fillers in the above-mentioned filter group 321 and the harmful gas absorption tower 322 can be selected according to the actual situation of harmful impurities in the tail gas.

[0031] The oxygen purification unit 33 is used to purify oxygen to meet the requirements of the ozone generator, so that it can be mixed with fresh oxygen later to enter the ozone generator to prepare ozone. Specifically, the oxygen purification unit 33 includes: a moisture removal adsorption tower and / or a purification adsorption tower. The number and combination of moisture removal adsorption towers and purification adsorption towers can be set as needed. Among them, the moisture removal adsorption tower can further remove the moisture contained in the oxygen, and the purification adsorption tower can further purify the oxygen through its filler.

[0032] In addition, the ozone recovery and utilization system also includes a pure gas buffer tank 90 disposed between the tail gas purification device 30 and the ozone generator 40, and the pure gas buffer tank 90 can be used to temporarily store excess pure gas, thereby balancing the gas pressure in the system. Furthermore, a filter 100 is also disposed between the pure gas buffer tank and the ozone generator 40. Thus, after passing through the filter 90, pure gas that meets the requirements can be sent to the downstream ozone generator 40, and gas that does not meet the requirements can be directly discharged to meet the standards.

[0033] In order to control the on-off of the pipelines in the system, the ozone recovery and utilization system further includes an electrical control device 110 , and each valve on the pipelines in the ozone recovery and utilization system can be controlled by the electrical control device 110 .

[0034] In summary, the present invention can recycle ozone by first destroying the ozone and catalytically reducing the ozone to convert it into oxygen. Then, the ozone is cooled, pressurized, and harmful impurities are removed to purify the oxygen to meet the requirements of the ozone generator. The oxygen is then mixed with fresh oxygen and fed into the ozone generator to prepare ozone for recycling.

[0035] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0036] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An ozone recovery and utilization system, characterized in that: The ozone recovery and utilization system comprises: an exhaust gas destroyer, an exhaust gas collection tank, an exhaust gas purification device and an ozone generator; The exhaust gas destroyer is connected to the exhaust gas purification device via the exhaust gas collecting tank, the exhaust gas purification device purifies the gas from the exhaust gas destroyer, and a secondary utilization loop is formed between the exhaust gas purification device and the exhaust gas collecting tank, and the exhaust gas purification device is also connected to the ozone generator downstream; The tail gas destroyer is used to destroy ozone and catalytically reduce ozone into oxygen. The tail gas destroyer is equipped with a temperature rise unit and a catalytic unit. The temperature rise unit is used to heat the ozone tail gas to increase the temperature of the ozone tail gas to avoid affecting the catalyst. The catalytic unit is used to catalyze the ozone tail gas after the temperature rise, so that it is decomposed into oxygen under the action of the corresponding catalyst. The filtering and absorbing unit is used to remove harmful impurities in the tail gas, and the filtering and absorbing unit comprises: a filter group and a harmful gas absorption tower, the filter group comprises a plurality of filters arranged in series, and the plurality of filters are respectively connected to the outlet end at the bottom of the tail gas collection tank through pipelines, and the harmful gas absorption tower is filled with fillers capable of absorbing harmful gases, so that the two-stage purification of the filter group and the harmful gas absorption tower is conducive to removing harmful impurities in the tail gas; The tail gas purification device comprises: a heat exchange and pressurization unit, a filtration and absorption unit, and an oxygen purification unit; The heat exchange and pressurization unit, the filtration and absorption unit, and the oxygen purification unit are sequentially arranged between the tail gas collection tank and the ozone generator, and the oxygen purification unit is also connected to the tail gas collection tank through a pipeline; The heat exchange and pressurization unit comprises: a heat exchanger, an oxygen compressor and a condenser; The heat exchanger, oxygen compressor and condenser are sequentially arranged between the tail gas collection tank and the filtering and absorbing unit; The ozone recovery and utilization system further comprises a pure gas buffer tank disposed between the tail gas purification device and the ozone generator, and a filter is further disposed between the pure gas buffer tank and the ozone generator; The oxygen compressor and the condenser are also connected to the tail gas collection tank via a pipeline, thus forming a secondary utilization loop between the tail gas purification device and the tail gas collection tank.

2. The ozone recovery and utilization system according to claim 1, characterized in that: The bottom of the tail gas collection tank is connected to the integrated sewage discharger via a control valve.

3. The ozone recovery and utilization system according to claim 1, characterized in that: The ozone recovery and utilization system also includes a circulating cooling water delivery pipeline of the heat exchange and pressurization unit.

4. The ozone recovery and utilization system according to claim 1, characterized in that: The oxygen compressor and the condenser are also connected to the tail gas collecting tank via a pipeline.

5. The ozone recovery and utilization system according to claim 1, characterized in that: A frequency converter is also arranged between the tail gas collecting tank and the oxygen compressor.

6. The ozone recovery and utilization system according to claim 1, characterized in that: The filtering and absorbing unit comprises: a filter group and a harmful gas absorption tower; The filter group includes a plurality of filters arranged in series, and the plurality of filters are respectively connected to the outlet end at the bottom of the tail gas collection tank through pipelines.

7. The ozone recovery and utilization system according to claim 1, characterized in that: The oxygen purification unit comprises: a moisture removal adsorption tower and / or a purification adsorption tower.

8. The ozone recovery and utilization system according to claim 1, characterized in that: The ozone recovery and utilization system also includes an electrical control device, and each valve in the ozone recovery and utilization system is controlled by the electrical control device.

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