CN210964631U - Get rid of VOCs's high-efficient absorption photocatalysis reaction module that can regenerate - Google Patents
Get rid of VOCs's high-efficient absorption photocatalysis reaction module that can regenerate Download PDFInfo
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- CN210964631U CN210964631U CN201921179791.3U CN201921179791U CN210964631U CN 210964631 U CN210964631 U CN 210964631U CN 201921179791 U CN201921179791 U CN 201921179791U CN 210964631 U CN210964631 U CN 210964631U
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Abstract
The utility model discloses a high-efficiency reproducible absorption photocatalytic reaction module for removing VOCs, which comprises a plurality of groups of waste gas purification pipeline units, wherein the plurality of groups of waste gas purification pipeline units have the same structure and are arranged in parallel; the single-group waste gas purification unit comprises a gas inlet end negative pressure device, a gas inlet valve, a waste gas purification unit, a gas outlet valve and a gas outlet end negative pressure device which are sequentially connected with one another along the waste gas direction through a pipeline; an additive feeding device is connected to a pipeline between the waste gas purification unit and the gas outlet valve through a branch pipe, and the additive feeding device is used for feeding additives into the waste gas purification unit so as to improve the regeneration efficiency of the photocatalytic regeneration adsorbent; the branch pipe is connected with a regulating valve in series; and the air inlet end of the first air inlet end negative pressure device on each group of waste gas purification pipeline units is provided with an air inlet branch pipe, and the plurality of air inlet branch pipes are connected with the waste gas pipe through an air inlet main pipe.
Description
Technical Field
The utility model relates to an air purification technical field specifically is a get rid of VOCs's high-efficient absorption photocatalysis reaction module that can regenerate.
Background
With the continuous development of society and economy in China, the atmospheric pollution is more serious. At present, the treatment of Volatile Organic Compounds (VOCs) becomes the core content of the treatment of atmospheric pollution in three major areas in China. VOCs are a generic term for any organic compound having a boiling point below 250 ℃ at atmospheric pressure, or all organic compounds that have a saturated vapor pressure above 133.32Pa at room temperature (25 ℃) and are emitted into the air as gaseous molecules. The environment-friendly efficient organic fertilizer has great harm to the environment and human health, has multiple environmental effects, and can react with sulfur dioxide, nitrogen oxide, particulate matters and other oxidants in the atmosphere to generate secondary pollutants such as ozone, photochemical smog and the like; and most VOCs are biologically toxic, some of which also have a triproducive effect. The development of efficient and stable VOCs purification equipment has important practical significance. At present, the main treatment methods for VOCs include adsorption methods, solvent absorption methods, photocatalytic methods, low-temperature plasma methods, catalytic oxidation methods, incineration methods, biological treatment methods, and the like. The method has the problems of single purification object, low degradation efficiency, easy adsorption saturation, secondary pollution generation and the like when being used singly, and part of equipment occupies a large area and has high investment. The adsorption technology and the photocatalysis technology are combined, the respective advantages can be exerted by utilizing the synergistic effect of the adsorbent and the photocatalyst, the air can be rapidly purified in a synergistic manner, and the problems can be better solved.
The adsorption-photocatalysis method is that a photocatalyst is loaded on an adsorbent base material in a certain form, and the prepared immobilized complex can degrade gas-phase organic matters under the irradiation of light with a certain wavelength; at the same timeThe photocatalyst can continuously decompose and finally mineralize the pollutants adsorbed by the adsorbent base material into CO2And H2And O, the in-situ regeneration of the adsorbent base material is realized, the problems that the adsorption material is easy to reach saturation adsorption and is inactivated and secondary pollution is possibly caused during desorption regeneration are solved, and in addition, the photocatalytic material is fixed on the adsorbent base material, so that the operation is simple, the photocatalytic material can be continuously used and is convenient to recycle.
CN208431874U discloses a low-concentration formaldehyde air purifier, which adopts the combination of multiple technologies of activated carbon adsorption, photocatalytic degradation and low-temperature plasma. The air is absorbed by the active carbon filter screen and is degraded by photocatalysis, so that pollutants such as dust, formaldehyde and the like and bacteria are effectively removed. The addition of the permanent magnet increases the energy of electrons, can generate more plasmas, thereby improving the efficiency of removing harmful gases, and particularly has remarkable effect on removing pollutants such as low-concentration formaldehyde and the like.
CN205095654U discloses a compound absorption photocatalysis device, including shell, air inlet, absorption unit, ultraviolet lamp, explosion-proof lamp shade and metal screen panel, the shell top is equipped with the gas outlet, and the bottom is equipped with the air inlet, and inside is equipped with absorbs unit and ultraviolet lamp, metal screen panel cover is outside explosion-proof lamp shade, the even coating in metal screen panel surface has titanium dioxide.
CN203829903U discloses an openable curtain type adsorption-photocatalytic reactor for treating organic waste gas, wherein a multistage openable adsorption photocatalytic curtain is vertically installed in a reactor box body along an airflow direction, and is installed on the inner wall of the box body through a curtain fixing device, meanwhile, a plurality of ultraviolet lamp tubes are fixed on the inner wall of the box body through lamp tube cards, and a circuit board is arranged outside the box body and can control the opening and closing of ultraviolet lamps; the openable adsorption photocatalysis curtain is connected and fixed with the curtain shaft and controlled by a stepping motor, so that the curtain can be opened and closed. After the organic waste gas enters the reactor, the organic waste gas is adsorbed and enriched by utilizing the high adsorbability of the activated carbon fibers, after the waste gas passes through the first-stage curtain for a period of time, the stepping motor is started to enable the first-stage curtain to move for 90 degrees, the ultraviolet lamp on the inner wall is started, organic matters enriched on the activated carbon fibers are subjected to photocatalytic reaction through the irradiation of ultraviolet light, the organic matters are oxidized and degraded, and meanwhile, the activated carbon fibers are regenerated.
The prior art does not load the photocatalyst to the adsorbent, and the adsorption area and the photocatalytic area are separated, so that the photocatalytic efficiency is low, and the adsorbent is easy to deactivate; the adsorbent regeneration time is long, the regeneration efficiency is low, the occupied area of equipment is large, and the energy consumption is high.
SUMMERY OF THE UTILITY MODEL
To the technical problem, the utility model provides a get rid of VOCs's high-efficient absorption photocatalysis reaction module of regenerating can realize the high-efficient normal position regeneration of the adsorbent of load photocatalyst. On one hand, the photocatalyst is loaded on the adsorbent, so that the VOCs degrading capacity and the recycling possibility are improved, on the other hand, part of the treated clean air is internally circulated, and the photocatalytic regeneration of the adsorbent is enhanced through an ozone generating device or a hydrogen peroxide atomizing device or a gas drying device, so that the interference of moisture on the regeneration effect is reduced, and the efficient in-situ regeneration of the photocatalyst-loaded adsorbent is realized.
In order to realize the technical purpose, the utility model adopts the following technical scheme:
a high-efficiency regenerable adsorption photocatalytic reaction module for removing VOCs comprises: the multiple groups of waste gas purification pipeline units have the same structure and are arranged in parallel;
the single-group waste gas purification unit comprises a gas inlet end negative pressure device, a gas inlet valve, a waste gas purification unit, a gas outlet valve and a gas outlet end negative pressure device which are sequentially connected with one another along the waste gas direction through a pipeline;
the exhaust gas purification unit comprises a reactor body, an adsorbent filled in the reactor body and loaded with a photocatalyst, and an ultraviolet generator arranged outside the reactor body;
an additive feeding device is connected to a pipeline between the waste gas purification unit and the gas outlet valve through a branch pipe, and the additive feeding device is used for feeding additives into the waste gas purification unit so as to improve the regeneration efficiency of the photocatalytic regeneration adsorbent; the branch pipe is connected with an adjusting valve for adjusting and controlling the addition amount of the additive in series;
and the air inlet end of the first air inlet end negative pressure device on each group of waste gas purification pipeline units is provided with an air inlet branch pipe, and the plurality of air inlet branch pipes are connected with the waste gas pipe through an air inlet main pipe.
The photocatalyst is nano titanium dioxide.
The adsorbent is one of coal-based activated carbon, activated carbon fiber and zeolite molecular sieve.
And negative pressure control units for regulating negative pressure are respectively arranged on the air inlet end negative pressure device and the air outlet end negative pressure device.
And the air inlet end negative pressure device and the air outlet end negative pressure device are fans.
The regulating valve is an electric regulating valve.
Has the advantages that:
the utility model discloses utilize the adsorbing material that the solidification has the photocatalyst to adsorb and degrade VOCs, furthest has utilized the adsorption efficiency of adsorbent and the photocatalytic ability of photocatalyst, and the partial VOCs of photocatalytic degradation when adsorbing VOCs has increased the contact probability of photocatalyst and VOCs with the adsorption characteristic of adsorbent, has strengthened the efficiency of photocatalytic degradation VOCs; the photocatalyst continuously degrades VOCs into CO2And H2And O, the deactivation time of the adsorbent is prolonged to a certain extent.
Further, the clean treated air is mixed with O3Or H2O2Or the desiccant is mixed and then internally circulated for regenerating the deactivated catalyst and the adsorbent, the addition of a small amount of oxidant can enhance the capability of the photocatalyst for treating the desorbed VOCs, and the addition of a small amount of desiccant can reduce competitive adsorption between water vapor and target pollutants to a certain extent, thereby increasing the photocatalytic activity of the catalyst, ensuring the regeneration efficiency and shortening the regeneration time of the adsorbent and the photocatalyst.
Furthermore, the utility model discloses the size is controllable, and concrete throughput is controllable, is applicable to the VOCs and administers the field, also can regard as pretreatment module or finally purify module and other technical antithetical couplets.
Drawings
FIG. 1 is a schematic structural diagram of the high-efficiency regenerable adsorption photocatalytic reaction module for removing VOCs of the present invention;
wherein, 1-a first waste gas purification unit, 2-a second waste gas purification unit, 111-a first air inlet end negative pressure device, 3-a first air inlet end negative pressure device control unit, 4-a first air inlet valve, 5-an ultraviolet lamp tube, 6-a first regulating valve, 7-a first additive feeding device, 8-a first air outlet valve, 9-a first air outlet end negative pressure device control unit, 10-an exhaust gas chamber, 11-an exhaust gas inlet perforated plate, 112-a first air outlet end negative pressure device, 211-a second air inlet end negative pressure device, 23-a second air inlet end negative pressure device control unit, 24-a second air inlet valve, 26-a second regulating valve, 27-a second additive feeding device, 28-a second air outlet valve, 29-a second air outlet end negative pressure device control unit, 212-second outlet negative pressure device, 21-clean air outlet perforated plate, 20-clean air chamber.
Detailed Description
For better understanding of the present invention, the following embodiments are provided to further explain the present invention, but the present invention is not limited to the following embodiments.
A high-efficiency regenerable adsorption photocatalytic reaction module for removing VOCs comprises: the multiple groups of waste gas purification pipeline units have the same structure and are arranged in parallel;
the single-group waste gas purification unit comprises a gas inlet end negative pressure device, a gas inlet valve, a waste gas purification unit, a gas outlet valve and a gas outlet end negative pressure device which are sequentially connected with one another along the waste gas direction through a pipeline;
the exhaust gas purification unit comprises a reactor body, an adsorbent filled in the reactor body and loaded with a photocatalyst, and an ultraviolet generator arranged outside the reactor body;
an additive feeding device is connected to a pipeline between the waste gas purification unit and the gas outlet valve through a branch pipe, and the additive feeding device is used for feeding additives into the waste gas purification unit so as to improve the regeneration efficiency of the photocatalytic regeneration adsorbent; the branch pipe is connected with an adjusting valve for adjusting and controlling the addition amount of the additive in series;
and the air inlet end of the first air inlet end negative pressure device on each group of waste gas purification pipeline units is provided with an air inlet branch pipe, and the plurality of air inlet branch pipes are connected with the waste gas pipe through an air inlet main pipe.
Get rid of VOCs's high-efficient reproducible absorption photocatalytic reaction module's operating method, when having a set of purification waste gas in the multiunit exhaust purification pipeline unit, have at least another set of exhaust purification pipeline unit to carry out the regeneration of adsorbent.
The module includes two sets of exhaust purification pipeline units, is first exhaust purification pipeline unit and second exhaust purification pipeline unit respectively, wherein, first exhaust purification pipeline unit includes: the first exhaust purification unit comprises a first air inlet end negative pressure device 111, a first air inlet valve 4, a first exhaust purification unit 1, a first air outlet valve 8, a first air outlet end negative pressure device 112, a first regulating valve 6 and a first additive feeding device 7.
The second exhaust gas purification pipe unit includes: a second intake end negative pressure device 211, a second intake valve 24, a second exhaust gas purification unit 2, a second outlet valve 28, a second outlet end negative pressure device 212, a second regulating valve 26, and a second additive feeding device 27.
The utility model relates to a get rid of VOCs's high-efficient reproducible absorption photocatalytic reaction module's working method is:
the first air inlet end negative pressure device is opened, the direction of air flow in the first air inlet end negative pressure device is consistent with the direction of waste gas entering, the waste gas enters the first waste gas purification unit through the first air inlet valve, the waste gas is adsorbed and degraded in a photocatalysis cooperation mode through irradiation of the ultraviolet light generator, the processed clean air is discharged through the first air outlet valve, at the moment, the first adjusting valve is closed, the first air outlet valve is opened, the first air outlet end negative pressure device is closed, and the first waste gas purification unit performs the function of waste gas purification;
meanwhile, the second air outlet end negative pressure device is opened, the direction of air flow in the second air outlet end negative pressure device is opposite to the direction of waste gas entering, the negative pressure of the air flow is smaller than that of the air inlet end negative pressure device, the second regulating valve is opened, the additive feeding device is mixed with clean air passing through the second air outlet valve through the second regulating valve and enters the second waste gas purification unit, the adsorbent and the photocatalyst are regenerated under the irradiation of the ultraviolet light generator, at the moment, the second air inlet valve is opened, the second air inlet end negative pressure device is closed, the second waste gas purification unit executes the photocatalytic regeneration function of the adsorbent, and the regenerated waste gas is mixed with the original waste gas and then enters the first waste gas purification unit again for treatment;
after a certain time, the functions of the two exhaust gas purification units are exchanged, and the operation steps are the same as described above.
Example 1
As shown in fig. 1, a high-efficiency reproducible absorption photocatalytic reaction module for removing VOCs,
1. the two groups of purification units are respectively composed of two square reactors made of quartz glass, and the reactors are filled with nano TiO2The coal-based activated carbon is characterized in that 4 ultraviolet lamp tubes with the wavelength of 254nm are arranged between the square reactors in total;
2. the first air inlet end negative pressure device control unit 3 controls the first air inlet end negative pressure device 111 to be opened, the second air inlet end negative pressure device control unit 23 controls the second air inlet end negative pressure device 211 to be closed, waste gas enters the first purification unit, under the synergistic action of adsorption and photocatalysis, the formaldehyde removal rate is over 90 percent, the first regulating valve 6 is closed, the first air outlet end negative pressure device control unit 9 controls the first air outlet end negative pressure device 112 to be closed, the second air outlet end negative pressure device control unit 29 controls the second air outlet end negative pressure device 212 to be closed, the second air outlet valve 28 is closed, the second regulating valve 26 is closed, and the second air inlet end negative pressure device control unit 23 controls the second air inlet end negative pressure device to be closed;
3. after the operation is carried out for a period of time, the second purification unit is started according to the mode to execute the gas purification function; at this time, the first air inlet end negative pressure device control unit 3 controls the first fan 111 to be closed, the first air outlet end negative pressure device control unit 9 controls the first air outlet end negative pressure device 112 to be opened, a certain amount of clean air is extracted, the first adjusting valve 6 is opened, the ozone generator 7 generates ozone and the clean air to be mixed and enter the first purification unit, and the adsorbent and the photocatalyst are regenerated.
4. And continuing to operate for a period of time, repeating the operation process, executing the purification function by the first purification unit, and executing the regeneration function of the adsorbent and the catalyst by the second purification unit. In the treatment process, the treatment effect on formaldehyde is better, the regeneration effect of the catalyst and the adsorbent is good, and the catalyst can continuously run for a longer time.
Example 2
Get rid of VOCs's high-efficient absorption photocatalysis reaction module that can regenerate
1. Two groups of purification units in example 1 were added to four square reactors made of ordinary glass, and the reactors were filled with loaded nano-TiO2The coal-based activated carbon is formed by installing 10 ultraviolet lamp tubes with 365nm in total between all square reactors,
2. air with the formaldehyde content of 1.0ppm is introduced into the reaction module at the flow rate of 5m L/min, the whole high-efficiency reproducible absorption photocatalytic reaction module is operated according to the operation mode of example 1, the formaldehyde removal rate is over 95 percent, the regeneration effect of the catalyst and the adsorbent is good, and the operation can be continued for a long time.
Example 3
Get rid of VOCs's high-efficient absorption photocatalysis reaction module that can regenerate
1. The arrangement of the square reactor of the purification unit and the ultraviolet lamp tube in the reaction module is the same as that of example 2, and the square reactor is filled with nano TiO load2The zeolite molecular sieve of (1).
2. When the first purification unit executes the purification function, the module operation mode is the same as that of example 1, and the removal rate of benzene, toluene and xylene is more than 95%;
3. after operating for a period of time, the second purification unit performs the gas purification function in the same manner as in example 1; at this time, the first purification unit regenerates the adsorbent and the photocatalyst, the first air inlet end negative pressure device control unit 3 controls the first fan 111 to be closed, the first air outlet end negative pressure device control unit 9 controls the first air outlet end negative pressure device 112 to be opened, a certain amount of clean air is extracted, the first regulating valve 6 is opened, and the hydrogen peroxide atomizer 7 generates hydrogen peroxide with a certain concentration to be mixed with the clean air and enter the first purification unit to regenerate the adsorbent and the photocatalyst.
4. And continuing to operate for a period of time, repeating the operation process, executing the purification function by the first purification unit, and executing the regeneration function of the adsorbent and the catalyst by the second purification unit. In the treatment process, the treatment effect on benzene, toluene and xylene is good, the removal rate is more than 95%, the regeneration effect of the catalyst and the adsorbent is good, and the catalyst and the adsorbent can continuously run for a long time.
Claims (7)
1. The utility model provides a get rid of VOCs's high-efficient absorption photocatalysis reaction module that regenerates which characterized in that includes: the multiple groups of waste gas purification pipeline units have the same structure and are arranged in parallel;
the single-group waste gas purification unit comprises a gas inlet end negative pressure device, a gas inlet valve, a waste gas purification unit, a gas outlet valve and a gas outlet end negative pressure device which are sequentially connected with one another along the waste gas direction through a pipeline;
the exhaust gas purification unit comprises a reactor body, an adsorbent filled in the reactor body and loaded with a photocatalyst, and an ultraviolet generator arranged outside the reactor body;
an additive feeding device is connected to a pipeline between the waste gas purification unit and the gas outlet valve through a branch pipe, and the additive feeding device is used for feeding additives into the waste gas purification unit so as to improve the regeneration efficiency of the photocatalytic regeneration adsorbent; the branch pipe is connected with an adjusting valve for adjusting and controlling the addition amount of the additive in series;
and the air inlet end of the first air inlet end negative pressure device on each group of waste gas purification pipeline units is provided with an air inlet branch pipe, and the plurality of air inlet branch pipes are connected with the waste gas pipe through an air inlet main pipe.
2. The high efficiency renewable adsorption photocatalytic reaction module for removing VOCs according to claim 1, wherein the photocatalyst is nano titanium dioxide.
3. The efficient renewable adsorption photocatalytic reaction module for removing VOCs as claimed in claim 1, wherein the adsorbent is one of coal-based activated carbon, activated carbon fiber and zeolite molecular sieve.
4. The high efficiency regenerable adsorbent photocatalytic reaction module for removing VOCs of claim 1, wherein the additive is O3Or H2O2Or a desiccant.
5. The high-efficiency renewable adsorption photocatalytic reaction module for removing VOCs according to claim 1, wherein negative pressure control units for regulating negative pressure are respectively arranged on the air inlet end negative pressure device and the air outlet end negative pressure device.
6. The high-efficiency renewable adsorption photocatalytic reaction module for removing VOCs according to claim 1, wherein the inlet end negative pressure device and the outlet end negative pressure device are fans.
7. The high efficiency regenerable adsorbent photocatalytic reaction module for removing VOCs as claimed in claim 1, wherein said regulating valve is an electric regulating valve.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110302667A (en) * | 2019-07-25 | 2019-10-08 | 江苏中科睿赛环境工程有限公司 | A kind of efficient renewable adsorption photochemical catalysis reaction module and its working method removing VOCs |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110302667A (en) * | 2019-07-25 | 2019-10-08 | 江苏中科睿赛环境工程有限公司 | A kind of efficient renewable adsorption photochemical catalysis reaction module and its working method removing VOCs |
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