Disclosure of Invention
The invention aims to provide an ozone recycling system which overcomes the defects in the prior art.
In order to achieve the aim, the invention provides an ozone recycling system, which comprises a tail gas destructor, a tail gas collecting tank, a tail gas purifying device and an ozone generator;
The tail gas destructor passes through the tail gas collecting tank and the tail gas purifying device, the tail gas purifying device is used for purifying gas from the tail gas destructor, a secondary utilization loop is formed between the tail gas purifying device and the tail gas collecting tank, and the tail gas purifying device is further connected with the downstream ozone generator.
As an improvement of the ozone recycling system, the bottom of the tail gas collecting tank is connected with the integrated blowdown device through a control valve.
As an improvement of the ozone recycling system, the tail gas purifying device comprises a heat exchange pressurizing unit, a filtering and absorbing unit and an oxygen purifying unit;
the heat exchange pressurizing unit, the filtering and absorbing unit and the oxygen purifying unit are sequentially arranged between the tail gas collecting tank and the ozone generator, and the oxygen purifying unit is further connected to the tail gas collecting tank through a pipeline.
As an improvement of the ozone recycling system, the ozone recycling system also comprises a circulating cooling water conveying pipeline of the heat exchange pressurizing unit.
As an improvement of the ozone recycling system, the heat exchange pressurizing unit comprises a heat exchanger, an oxygen compressor and a condenser;
The heat exchanger, the oxygen compressor and the condenser are sequentially arranged between the tail gas collecting tank and the filtering and absorbing unit, and the oxygen compressor is connected with the tail gas collecting tank through a pipeline.
As an improvement of the ozone recycling system, a frequency converter is arranged between the tail gas collecting tank and the oxygen compressor.
As an improvement of the ozone recycling system, the filtering and absorbing unit comprises a filter group and a harmful gas absorbing tower;
The filter group comprises a plurality of filters which are arranged in series, and the filters are respectively connected to the outlet end of the bottom of the tail gas collecting tank through pipelines.
As an improvement of the ozone recycling system, the oxygen purifying unit comprises a moisture removal adsorption tower and/or a purification adsorption tower.
As an improvement of the ozone recycling system, the ozone recycling system also comprises a pure gas buffer tank arranged between the tail gas purifying device and the ozone generator.
As an improvement of the ozone recycling system, the ozone recycling system also comprises an electrical control device, and each valve in the ozone recycling system is controlled by the electrical control device.
Compared with the prior art, the invention has the beneficial effects that the ozone can be recycled, ozone is firstly destroyed, the ozone is catalytically reduced into oxygen, then processes such as cooling, pressurizing, removing harmful impurities and the like are carried out, the oxygen is purified to meet the requirements of an ozone generator, and then the oxygen is mixed with fresh oxygen to enter the ozone generator for preparing ozone, so that the ozone can be recycled.
Detailed Description
The present invention will be described in detail with reference to the following embodiments, but it should be understood that these embodiments are not limiting, and functional, method, or structural equivalents and alternatives thereof by those skilled in the art are within the scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides an ozone recycling system, which includes an exhaust gas destructor 10, an exhaust gas collection tank 20, an exhaust gas purifying device 30, and an ozone generator 40.
The exhaust gas destructor 10 is used to destroy ozone and catalytically reduce the ozone to oxygen. Specifically, the exhaust gas destructor 10 has a temperature rising unit and a catalytic unit built therein. The temperature rising unit is used for heating the ozone tail gas and increasing the temperature of the ozone tail gas so as to avoid affecting the catalyst. The catalytic unit is used for catalyzing the ozone tail gas after temperature rise, so that the ozone tail gas is decomposed into oxygen under the action of the corresponding catalyst. The exhaust gas destructor 10 is connected to an exhaust gas purifying device 30 via an exhaust gas collecting tank 20. The exhaust gas purification device 30 is also connected to a downstream ozone generator 40.
The exhaust gas collection tank 20 is used for collecting the destroyed exhaust gas. Meanwhile, the bottom of the exhaust gas collection tank 20 is connected with the integrated blowdown device 50 through a control valve.
The exhaust gas purifying device 30 purifies the gas from the exhaust gas destructor 10, and a secondary utilization circuit is formed between the exhaust gas purifying device 30 and the exhaust gas collecting tank 20.
Specifically, the exhaust gas purifying device 30 includes a heat exchange pressurizing unit 31, a filtering and absorbing unit 32, and an oxygen purifying unit 33. Wherein, the heat exchanging and pressurizing unit 31, the filtering and absorbing unit 32 and the oxygen purifying unit 33 are sequentially arranged between the tail gas collecting tank 20 and the ozone generator 40.
The heat exchanging and pressurizing unit 31 is used for realizing cooling, pressurizing and other treatments. The heat exchanging and pressurizing unit 31 includes a heat exchanger 311, an oxygen compressor 312, and a condenser 313. Among them, a heat exchanger 311, an oxygen compressor 312, and a condenser 313 are sequentially disposed between the exhaust gas collection tank 20 and the filtration and absorption unit 32. The heat exchanger 311 and the condenser 313 each have an inlet and an outlet for circulating cooling water. Correspondingly, the ozone recycling system also comprises a circulating cooling water conveying pipeline 60 of the heat exchanger 311 and the condenser 313.
In addition, in order to facilitate control of the operating frequency of the oxygen compressor 312, a frequency converter 70 is also provided between the exhaust gas collection tank 20 and the oxygen compressor 312. The oxygen compressor 312 and the condenser 313 are also connected to the exhaust gas collection tank 20 through a pipe 80, thus forming a secondary usage loop between the exhaust gas purification device 30 and the exhaust gas collection tank 20.
The heat exchanger 311, the oxygen compressor 312 and the condenser 313 may be conventional products, and those skilled in the art may select corresponding types of products according to the needs and apply the products to the present embodiment.
The filter absorber unit 32 is used to remove harmful impurities from the exhaust gas. The filtering and absorbing unit 32 includes a filter group 321 and a harmful gas absorbing tower 322. Wherein, the filter group 321 comprises a plurality of filters arranged in series, and the plurality of filters are respectively connected to the outlet end of the bottom of the exhaust gas collecting tank 20 through pipelines. The harmful gas absorption tower 322 is filled with a filler capable of absorbing harmful gas, so that the two-stage purification of the filter group 321 and the harmful gas absorption tower 322 is beneficial to removing harmful impurities in tail gas. The selection of the packing in the filter unit 321 and the harmful gas absorber 322 may be selected according to the actual situation of the harmful impurities in the exhaust gas.
The oxygen purification unit 33 is used for purifying the oxygen to meet the requirements of the ozone generator, so that the oxygen can be conveniently mixed with fresh oxygen again to enter the ozone generator for preparing ozone. Specifically, the oxygen purification unit 33 includes a moisture removal adsorption tower and/or a purification adsorption tower, and the number and combination of the moisture removal adsorption tower and the purification adsorption tower may be set as needed. The water removal adsorption tower can further remove water contained in the oxygen, and the purification adsorption tower can further purify the oxygen through the filler of the purification adsorption tower.
In addition, the ozone recycling system further includes a pure gas buffer tank 90 disposed between the exhaust gas purifying 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 air pressure in the system. Further, a filter 100 is provided between the pure gas buffer tank and the ozone generator 40. Thus, through the filter 90, the desired clean gas may be fed to the downstream ozone generator 40 and the undesired gas may be vented directly to standard.
In order to control the on-off of the pipelines in the system, the ozone recycling system further comprises an electrical control device 110, and each valve on the pipeline in the ozone recycling system can be controlled by the electrical control device 110.
In summary, the invention can recycle the ozone, firstly, the ozone is destroyed, the ozone is catalytically reduced into oxygen, then the processes of cooling, pressurizing, removing harmful impurities and the like are carried out, the oxygen is purified to meet the requirements of an ozone generator, and then the oxygen is mixed with fresh oxygen to enter the ozone generator for preparing the ozone, thereby realizing the recycling.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.