CN219252222U - Organic waste gas purifying device - Google Patents
Organic waste gas purifying device Download PDFInfo
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- CN219252222U CN219252222U CN202223520015.XU CN202223520015U CN219252222U CN 219252222 U CN219252222 U CN 219252222U CN 202223520015 U CN202223520015 U CN 202223520015U CN 219252222 U CN219252222 U CN 219252222U
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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
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- 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 utility model provides a purifying device of organic waste gas, comprising a static pressure filtering device, a photocatalysis purifying tower, an adsorption device, a circulation photocatalysis device and an exhaust chimney which are connected in sequence; the adsorption device comprises at least two resin adsorption tanks which are arranged in parallel, and an exhaust gas inlet and an exhaust gas outlet of the resin adsorption tanks are respectively connected to an air outlet of the photocatalytic purification tower and an exhaust chimney through pipelines; the circulating photocatalytic device comprises a heat exchange system, a photocatalytic desorption tower and a desorption fan, wherein the heat exchange system is used for carrying out cold and heat exchange on a resin adsorption tank, a circulating gas inlet and a circulating gas outlet are further formed in the resin adsorption tank, the desorption fan is arranged between an air outlet of the photocatalytic desorption tower and the circulating gas inlet, and the circulating gas outlet is connected with an air inlet of the photocatalytic desorption tower and an exhaust chimney in a switching mode. The purification device is used for purifying the organic waste gas, and has the advantages of low energy consumption, high waste gas treatment efficiency and safe operation.
Description
Technical Field
The utility model belongs to the technical field of waste gas purifying devices, and particularly relates to a purifying device for organic waste gas.
Background
In the production operation process of the spraying place, inflammable, explosive, poisonous and harmful waste gas is generated from raw materials to finished products; the thinner used in the paint is usually composed of several solvents, typically benzene, aldehydes, ketones and alcohols, such as benzene, toluene, cyclohexanone, ethyl acetate, acetic acid, butyl acetate, xylene and the like, so that the solvents have great harm to human bodies, and the human bodies can be damaged by blood, lymph, chronic poisoning and the like due to long-term contact of toxic and harmful substances.
In the prior art, a plurality of treatment methods exist in the waste gas in the spraying industry, such as a water washing method, but the method has little effect on water-insoluble nonpolar organic matters by using the water washing method, and can not effectively absorb and treat the organic matters in the waste gas; the RCO regenerative catalytic combustion method requires an exhaust gas having a high organic matter content and a clear exhaust gas composition. However, the performance of the selective catalyst tends to be lowered due to the complex components in the exhaust gas, the operation and investment costs of the exhaust gas with low energy and large air volume are quite high, and the risk of the exhaust gas with unstable exhaust gas concentration exists. The plasma method has a certain effect on low-concentration and easily-degradable pollutants, but has a poor effect on refractory organic matters such as benzene, lipid and the like. RTO regenerative combustion method: the RTO heat accumulating burning process is to heat tail gas to 760-850 deg.c to produce carbon dioxide and water, burn waste gas, store heat in the heat accumulator via heat exchange, and transfer heat to low temperature waste gas via heat exchange to preheat. The heat accumulating combustion method has low energy consumption and high purifying efficiency, but the incinerator and the heat accumulator have higher cost and higher investment cost. The active carbon adsorption method is more commonly used, but the active carbon adsorption effect of the method for large-molecular organic matters or larger dust solution in the waste gas is reduced, and the method needs to be replaced frequently and has low operation economy. Although the prior art also has the advantages of reducing the replacement frequency of the activated carbon by recycling the activated carbon, the regeneration of the activated carbon has certain difficulty, needs higher temperature for heating, has more ash and has potential safety hazard.
Therefore, it is highly desirable to design a safe, efficient and low cost organic waste gas purifying device.
Disclosure of Invention
The utility model aims at the problems and provides a purifying device for organic waste gas, which is used for effectively treating the organic waste gas in the spraying industry.
The technical scheme of the utility model is as follows: the organic waste gas purifying device comprises a static pressure filtering device, a photocatalysis purifying tower, an adsorption device, a circulation photocatalysis device and an exhaust chimney which are connected through pipelines, wherein valves are arranged on the pipelines connecting all the parts; wherein, the liquid crystal display device comprises a liquid crystal display device,
the static pressure filtering device, the photocatalytic purification tower and the adsorption device are sequentially connected, the adsorption device comprises at least two resin adsorption tanks which are arranged in parallel, and an exhaust gas inlet and an exhaust gas outlet of the resin adsorption tanks are respectively connected to an air outlet of the photocatalytic purification tower and an exhaust chimney through pipelines;
the circulating photocatalytic device comprises a heat exchange system, a photocatalytic desorption tower and a desorption fan, wherein the heat exchange system is used for carrying out cold and heat exchange on the resin adsorption tank, a circulating gas inlet and a circulating gas outlet are further formed in the resin adsorption tank, the desorption fan is arranged between the gas outlet of the photocatalytic desorption tower and the circulating gas inlet, and the circulating gas outlet is connected with the gas inlet of the photocatalytic desorption tower and an exhaust chimney in a switching mode. The circulating photocatalytic device is used for desorbing and decomposing organic waste gas adsorbed by the resin in the resin adsorption tank and is used for reusing the resin adsorption tank.
The utility model further provides that the heat exchange system comprises a fresh air heat exchanger for preheating and condensing air, and the fresh air heat exchanger is connected to the air inlet of the photocatalytic desorption tower.
The utility model is further arranged that the heat exchange system comprises a steam pipeline and a condensate recovery pipeline which are connected with the resin adsorption tank and a fan which is connected with the air inlet of the photocatalytic desorption tower, and the upper part and the lower part of the resin adsorption tank are respectively provided with a hot steam inlet and a condensate outlet.
The utility model further provides that the circulating photocatalytic device further comprises a nitrogen purging system, wherein the nitrogen purging system is used for purging the resin adsorption tank with nitrogen, the adsorption resin tank is correspondingly provided with a nitrogen inlet, and purged nitrogen is discharged through an exhaust gas outlet of the resin adsorption tank.
The utility model further provides that a coarse and medium-efficiency filter is arranged in the static pressure filter device.
The utility model is further arranged that the photocatalysis purification tower and the photocatalysis desorption tower comprise a tower body, a plurality of groups of photoreaction modules arranged in the tower body and a cleaning module; wherein, the liquid crystal display device comprises a liquid crystal display device,
the left end and the right end of the tower body are respectively provided with an air inlet and an air outlet, the bottom of the tower body is provided with a liquid outlet, and the photoreaction modules are arranged at intervals along the gas flow direction in the tower body; the cleaning module comprises a plurality of spraying pipelines arranged between the adjacent photoreaction modules, a cleaning water tank and a water pump which are arranged on the outer side of the tower body, and a plurality of cleaning spray heads are arranged on each spraying pipeline at intervals; and the water in the cleaning water tank is conveyed into each spraying pipeline through a pipeline under the action of a water pump and is sprayed out through the cleaning spray heads.
The utility model further provides that the photoreaction module comprises an ultraviolet lamp and a photocatalyst layer.
The utility model further provides that a heat insulation material is arranged outside the tower body of the photocatalytic desorption tower.
The utility model is further characterized in that the resin adsorption tank is internally provided with large-aperture adsorption resin for adsorbing organic matters which are not completely degraded by the photocatalytic purification device.
The utility model is further provided that the middle part in the resin adsorption tank is provided with a tube array, and the tube array is filled with large-aperture adsorption resin; the waste gas inlet and the circulating gas inlet are formed in the lower portion of the resin adsorption tank, and the waste gas outlet and the circulating gas outlet are formed in the upper portion of the resin adsorption tank.
The utility model is further provided that a main fan is arranged at the air inlet of the exhaust chimney, and a VOCs detector is arranged at the outlet close to the exhaust chimney; the VOCs detector and O are also arranged on the pipeline connected with the circulating gas outlet of the resin adsorption tank and the photocatalytic desorption tower 3 And a detector.
Compared with the prior art, the utility model has the following beneficial effects: (1) The device combines physical adsorption and chemical reaction to carry out waste gas purification treatment so as to carry out low cost and high efficiency treatment on waste gas. (2) The device of the utility model realizes the recycling of the resin adsorption tank by adopting the resin adsorption tank and matching with the circulating photocatalysis device. (3) When the heat exchange system is used for cyclic desorption, fresh air heated by heat exchange is provided for photocatalysis to improve ozone content, so that the aim of improving desorption efficiency is fulfilled, and the heat exchange system can be used for cooling and dehumidifying the activated carbon after photocatalytic desorption. (4) The photocatalysis purification tower and the photocatalysis desorption tower have self-cleaning and cleaning functions, so that the service life of the device is prolonged.
Drawings
Fig. 1 is a schematic view of the structure of the purification apparatus described in embodiment 1.
Fig. 2 is a schematic structural view of a photocatalytic purification tower.
Fig. 3 is a schematic structural view of the purification apparatus described in example 2.
The device comprises a static pressure filter device, a photocatalytic purification tower, a tower body, a 211, an air inlet of the purification tower, a 212, an air outlet of the purification tower, a 213, a liquid outlet, a 22, a photoreaction module, a 23, a cleaning module, a 231, a spray pipeline, a 232, a cleaning spray head, a 233, a cleaning water tank, a 234, a water pump, a3, a resin adsorption tank, a 31, an exhaust gas inlet, a 32, an exhaust gas outlet, a 33, a circulating gas inlet, a 34, a circulating gas outlet, a 35, a tube array, a 36, a hot steam inlet, a 37, a condensate outlet, a 38 and a nitrogen air inlet, wherein the static pressure filter device is arranged in the device; 4. the circulating photocatalysis device 41, the fresh air heat exchanger 42, the photocatalysis desorption tower 43, the desorption fan 5, the exhaust chimney 6, the main fan 7, the VOCs detector 8, O 3 Detector 9, fan, 10, second fan.
Detailed Description
The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.
Example 1
Referring to fig. 1 and 2, the utility model provides a purifying device for organic waste gas, which comprises a static pressure filtering device 1, a photocatalysis purifying tower 2, an adsorption device, a circulating photocatalysis device 4 and an exhaust chimney 5 which are connected through pipelines, wherein valves are arranged on the pipelines connecting all parts; wherein, the liquid crystal display device comprises a liquid crystal display device,
the static pressure filtering device 1, the photocatalytic purification tower 2 and the adsorption device are sequentially connected, the adsorption device comprises at least two resin adsorption tanks 3 which are mutually connected in parallel, and an exhaust gas inlet 31 and an exhaust gas outlet 32 of the resin adsorption tanks 3 are respectively connected to an air outlet of the photocatalytic purification tower 2 and an exhaust chimney 5 in a pipeline manner;
the circulating photocatalytic device 4 comprises a heat exchange system, a photocatalytic desorption tower 42 and a desorption fan 43 which are connected through pipelines, the heat exchange system is used for carrying out cold and heat exchange on the resin adsorption tank 3, the resin adsorption tank 3 is further provided with a circulating gas inlet 33 and a circulating gas outlet 34, the desorption fan 43 is arranged between the gas outlet of the photocatalytic desorption tower 42 and the circulating gas inlet 33, and the circulating gas outlet 34 is connected with the gas inlet of the photocatalytic desorption tower 42 and the exhaust chimney 5 in a switching mode. In this embodiment, the circulation gas outlet 34 is switched to connect the gas inlet of the photocatalytic desorption tower 42 and the exhaust stack 5 by controlling the D1 valve and the F2 valve.
In this embodiment, the heat exchange system includes a fresh air heat exchanger 41 for preheating and condensing the transported air, and the fresh air heat exchanger 41 is connected to the air inlet of the photocatalytic desorption tower 42.
In this embodiment, a coarse and medium-efficiency filter is installed in the static pressure filter device 1, and coarse and medium-efficiency filter cotton is installed in the coarse and medium-efficiency filter for physically adsorbing macromolecular polymers and dust in the organic waste gas.
In this embodiment, the photocatalytic purification tower 2 includes a tower body 21, a plurality of groups of photoreaction modules 22 disposed in the tower body 21, and a cleaning module 23; wherein, the liquid crystal display device comprises a liquid crystal display device,
the left and right ends of the tower body 21 are respectively provided with an air inlet 211 and an air outlet 212, and the bottom ends of the tower body 21 are respectively provided with a liquid outlet 213; the photoreaction modules 22 are arranged at intervals along the gas flow direction inside the tower body 21, and the photoreaction modules 22 comprise ultraviolet lamps and photocatalyst layers;
the cleaning module 23 includes a plurality of groups of spray pipes 231 disposed between two adjacent groups of photoreaction modules 22, a plurality of cleaning nozzles 232 are installed on the spray pipes 231 at intervals, an inlet pipe of the spray pipe 231 is connected to a cleaning water tank 233 disposed outside the tower body 21, under the action of a power device water pump 234, water in the cleaning water tank 233 is conveyed into each spray pipe 231 through a pipe and is sprayed out through the cleaning nozzles 232, and the final cleaning liquid flows out through the liquid outlet 213 and is recycled. In order to avoid that polymers or dust generated during the photocatalytic process affect the photon generation amount, the photoreaction module 22 needs to be periodically cleaned after a period of use by using the cleaning module 23. The air inlet of the photocatalytic purification tower 2 is also connected with a fan 9, after the cleaning is finished, the fan 9 is started, the A1 valve and the A2 valve are opened, and the water of the ultraviolet lamp in the photoreaction module 22 is dried by cold air for subsequent efficient use.
The photocatalytic purification tower 2 has the function of combining the generated shortwaves with a photocatalyst to form active substances, and carrying out photocatalytic and photo-oxidation reactions on the active substances and organic waste gas to generate carbon dioxide and water, so that the organic waste gas is treated.
In this embodiment, the adsorption module includes 3 groups of resin adsorption tanks 3 arranged in parallel, a tube array 35 is installed in the middle part in each resin adsorption tank 3, and a large-aperture adsorption resin is filled in the tube array 35; the exhaust gas inlet 31 and the exhaust gas outlet 32 are respectively arranged at the bottom and the top of the resin adsorption tank 3, and the circulating gas inlet 33 and the circulating gas outlet 34 are arranged at the lower part and the upper part of the resin adsorption tank 3. The communication pipelines of the exhaust gas inlet 31 and the photocatalytic purification tower 2 on the 3 groups of resin adsorption tanks 3 are respectively provided with an A1 valve, a B1 valve and a C1 valve, and the communication pipelines of the exhaust gas outlet 32 and the exhaust chimney 5 are respectively provided with an A2 valve, a B2 valve and a C2 valve, so as to control the adsorption of the resin adsorption tanks 3 on organic exhaust gas; the communication pipeline of the circulating gas inlet 33 and the desorption fan 42 is respectively provided with an A3 valve, a B3 valve and a C3 valve, and the pipeline of the circulating gas outlet 34 is respectively provided with an A4 valve, a B4 valve and a C4 valve, which are used for controlling the desorption and decomposition of the organic waste gas adsorbed in the resin adsorption tank 3. The 3 groups of resin adsorption tanks 3 can be used respectively, after one resin adsorption tank is adsorbed and saturated, the connecting pipeline of the resin adsorption tank and the exhaust chimney 5 can be closed, the other resin adsorption pipeline is opened, and the circulating photocatalytic device 4 is used for regenerating the resin adsorption tank with the adsorbed and saturated.
In this embodiment, the photocatalytic desorption tower 42 has the same structure as the photocatalytic purification tower 2, and includes a tower body, a plurality of groups of photoreaction modules arranged in the tower body at intervals, and a cleaning module.
Further, a thermal insulation material is further disposed on the body of the photocatalytic desorption tower 42. Specifically, the outside of the body of the photocatalytic desorption tower 42 is insulated with aluminum silicate and is wrapped with aluminum plates.
Likewise, in order to avoid that the polymer or dust generated during the photocatalytic process affects the photon generation amount, it is necessary to periodically clean the photoreaction module using the cleaning module of the photocatalytic desorption tower 42 after a period of use. After cleaning, the fresh air heat exchanger 41 and the desorption fan 43 are started, the valves F1, A3 and A4 and the valve F2 are opened, the valve D1 is closed, and the water of the ultraviolet lamp in the photoreaction module is dried by cold air for the next photocatalytic desorption.
The photocatalytic desorption tower 42 is used for introducing undegraded organic waste gas desorbed from the resin adsorption tank 3 into the photocatalytic desorption tower 42, performing photocatalytic and photo-oxidation reactions to generate carbon dioxide and water, blowing hot air into the fresh air heat exchanger 41 for heating the environment in the resin adsorption tank, accelerating the temperature rise of VOCs, and finally removing organic matters in the large-aperture adsorption resin after a period of circulating photocatalytic and desorption processes, thereby realizing the recycling of the resin adsorption tank 3. The desorption fan 43 is used for desorbing the saturated large-aperture adsorption resin, and is connected with the photocatalytic desorption tower 42 in series to achieve the ventilation quantity of cyclic desorption degradation.
Further, the pipeline that the recycle gas outlet 34 of the resin adsorption tank 3 and the photocatalytic desorption tower 42 are connected is provided with a VOCs detector 7 and an ozone detector 8, the VOCs detector 7 is used for detecting the treatment effect of the recycle gas, and when the ozone concentration is reduced or belongs to negative pressure, the valve F1 is required to be opened for pressure relief or increasing the oxygen content. The outlet position of the exhaust chimney 5 is also provided with a VOCs detector 7 for detecting whether the exhaust gas to be discharged reaches the standard.
Further, a main fan 6 is further arranged on an inlet pipeline of the exhaust chimney 5, and standard exhaust gas is discharged into the chimney.
When the purification device is used for treating the organic waste gas, the organic waste gas to be treated is firstly treated by the static pressure filtering device 1, and macromolecular polymers and dust in the organic waste gas are removed by physical adsorption. The waste gas discharged from the static pressure filter device 1 enters the photocatalysis purification tower 2, and the organic waste gas is subjected to photocatalysis and photooxidation reaction under the action of an ultraviolet lamp and a photocatalyst to generate carbon dioxide and water. The organic waste gas which is not purified after being treated by the photocatalytic purification tower 2 enters the resin adsorption tank 3 again to be adsorbed by the large-aperture adsorption resin, and when the outlet concentration reaches the maximum value of the emission standard, the other standby resin adsorption tank is started to continue to adsorb; the saturated resin adsorption tank is used for analyzing and degrading organic matters adsorbed by the large-aperture adsorption resin through the photocatalytic desorption tower 42, and circulating photocatalysis is used for blowing out the organic matters from the large-aperture adsorption resin, so that the large-aperture adsorption resin is regenerated for the next adsorption.
The process of circulating photocatalysis by using the photocatalysis desorption tower comprises the following steps: the photocatalytic desorption tower 5 is characterized in that the temperature is kept inside the photocatalytic desorption tower 42 by switching the valve of the large-aperture adsorption resin area, and under the condition of controlling the contact time, circulating gas reaches the temperature rising circulation, the saturated large-aperture adsorption resin is adsorbed, VOCs are desorbed through the temperature rising, the shortwave generated by the ultraviolet lamp and the photocatalyst are combined to form active substances to be subjected to photocatalysis and photooxidation reaction with the desorbed VOCs to generate carbon dioxide and water, all the VOCs in the large-aperture adsorption resin are desorbed and degraded through multiple times of circulation, the ultraviolet lamp and the switching valve are closed, the desorption fan 43 and the valves F1 and F2 are opened, the loop valve D1 is closed, the aim of reducing the temperature and the humidity of the large-aperture adsorption resin is fulfilled, and the water and the heat are discharged to a chimney. The desorption fan 43 carries out temperature-rising photodegradation desorption and desorption on the large-aperture adsorption resin by switching a fresh air valve, a butterfly valve connected with a photocatalytic adsorption tower and a butterfly valve of a resin adsorption tank, and carries out temperature-reducing and dehumidifying measures on the large-aperture adsorption resin after the desorption and the desorption by cleaning and blowing the ultraviolet lamp.
The purification performance test was performed using the purification apparatus described in this example.
Specific test conditions: weather is sunny, and the temperature is 18 ℃;
the device comprises a photocatalytic desorption tower, a photocatalytic desorption tower and a control system, wherein the parameter specification of the photocatalytic desorption tower is 1100 x 1000mm, 40 ultraviolet lamps with 185nm wavelength are arranged in 800 model, an inlet and outlet pipeline DN250 is arranged, and the wind speed of an air pipe is 11.32m/s; an adsorption device, the wind speed converted into a stainless steel box body (specification: 1000 x 1190 x 740 mm) is 0.5m/s; resin filling amount 0.2m 3 Weighing 110kg. The measured air quantity is 2000m 3 And/h. The xylene solvent was used as a pollution source, the adsorption time was 22 hours, and the data of the inlet and outlet concentration, the treatment efficiency and the adsorption amount of the purification apparatus were measured as shown in Table 1 below.
Table 1 purification performance test
As can be seen from the above table, the adsorption inlet concentration is 110mg/m 3 . After 22h of adsorption, 110kg of resin adsorbed 6.59kg of xylene. The outlet efficiency can reach 68%. After the adsorption is stopped, a desorption fan is turned on, a valve corresponding to the circulating photocatalytic device is turned on, an ultraviolet lamp of the photocatalytic desorption tower is turned on, circulating photocatalysis is started, and the change conditions of circulating temperature and circulating VOC concentration are observed. Wherein the air quantity of the desorption fan is 500m 3 And/h, the residence time of the photocatalytic desorption tower is 7.5s, and the section wind speed of the resin during desorption is 0.13m/s. The test data are shown in table 2 below.
Table 2 cycle photocatalytic performance detection
As can be seen from the above table, the temperature was increased from 20℃at room temperature to 57℃at maximum, and the concentration was not decreased. And closing an ultraviolet lamp of the photocatalytic desorption tower, and opening a fresh air valve to cool the resin equipment to normal temperature for re-adsorption. The adsorption is carried out again for 22 hours, the initial adsorption efficiency can still be maintained to 99 percent, and the efficiency can reach 66.3 percent when the adsorption is carried out for 22 hours. The adsorption-desorption experiment is repeated for 10 times, and the treatment efficiency is at least 64% after 22 hours of adsorption. Has better repeatability.
Example 2
The main difference compared to example 1 is the difference in the photocatalytic cycle device. As shown in fig. 3, the circulating photocatalytic device 4 includes a heat exchange system, a photocatalytic desorption tower 42 and a desorption fan 43 connected by pipes, the heat exchange system is used for performing cold-heat exchange on the resin adsorption tank 3, the resin adsorption tank 3 is further provided with a circulating gas inlet 33 and a circulating gas outlet 34, the desorption fan 43 is disposed between the gas outlet of the photocatalytic desorption tower 42 and the circulating gas inlet 33, and the circulating gas outlet 34 is connected to the gas inlet of the photocatalytic desorption tower 42 and the exhaust chimney 5 in a switching manner. In this embodiment, the circulation gas outlet 34 is switched to connect the gas inlet of the photocatalytic desorption tower 42 and the exhaust stack 5 by controlling the D1 valve and the F2 valve.
In this embodiment, the heat exchange system includes a hot steam line and a condensate recovery line connected to the resin adsorption tank, and a second fan 10 connected to the photocatalytic desorption tower, and correspondingly, the upper and lower parts of the resin adsorption tank 3 are respectively provided with a hot steam inlet 36 and a condensate outlet 37.
The circulating photocatalytic device further comprises a nitrogen purging system, wherein the nitrogen purging system is used for purging the resin adsorption tank with nitrogen, the adsorption resin tank is correspondingly provided with a nitrogen inlet 38, and purged nitrogen is discharged through a circulating gas outlet 34 of the resin adsorption tank 3.
In this example, as in example 1, when the outlet concentration reaches the maximum value of the discharge standard, another spare resin adsorption tank is opened to continue adsorption; and the resin adsorption tank which is adsorbed and saturated is used for analyzing and degrading organic matters adsorbed by the large-aperture adsorption resin through the photocatalytic desorption tower, and circulating photocatalysis is used for blowing out the organic matters from the large-aperture adsorption resin, so that the large-aperture adsorption resin is regenerated and used for next adsorption.
The process of circulating photocatalysis using the photocatalytic desorption tower described in example 2 is: and hot steam is introduced into the resin adsorption tank through a hot steam inlet 36 to heat the large-aperture adsorption resin, so that the temperature of VOCs in the resin adsorption tank is increased, desorption is accelerated, the VOCs are discharged to the photocatalytic desorption tower through the circulating gas outlet for photocatalytic treatment, and condensate in the resin adsorption tank 3 is discharged through a condensate outlet 37 at the lower part for collection. The degradation condition of circulating gas is judged through the VOCs detector, VOCs in the large-aperture adsorption resin are completely desorbed and degraded through multiple times of circulation, then the ultraviolet lamp and the valve between the circulating gas outlet and the photocatalytic desorption tower are closed, the second fan 10, the valves F1, A3, A4 and the valve F2 are opened, the loop valve D1 is closed, the purpose of reducing the temperature and the humidity of the large-aperture adsorption resin is achieved, and moisture and heat are discharged to a chimney.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the utility model as defined by the appended claims and their equivalents.
Claims (10)
1. The organic waste gas purifying device is characterized by comprising a static pressure filtering device, a photocatalysis purifying tower, an adsorption device, a circulating photocatalysis device and an exhaust chimney which are connected through pipelines, wherein valves are arranged on the pipelines connecting the parts; wherein, the liquid crystal display device comprises a liquid crystal display device,
the static pressure filtering device, the photocatalytic purification tower and the adsorption device are sequentially connected, the adsorption device comprises at least two resin adsorption tanks which are arranged in parallel, and an exhaust gas inlet and an exhaust gas outlet of the resin adsorption tanks are respectively connected to an air outlet of the photocatalytic purification tower and an exhaust chimney through pipelines;
the circulating photocatalytic device comprises a heat exchange system, a photocatalytic desorption tower and a desorption fan, wherein the heat exchange system is used for carrying out cold and heat exchange on the resin adsorption tank, a circulating gas inlet and a circulating gas outlet are further formed in the resin adsorption tank, the desorption fan is arranged between the gas outlet of the photocatalytic desorption tower and the circulating gas inlet, and the circulating gas outlet is connected with the gas inlet of the photocatalytic desorption tower and an exhaust chimney in a switching mode.
2. An organic waste gas purifying device according to claim 1, wherein the heat exchange system comprises a fresh air heat exchanger for preheating and condensing air, the fresh air heat exchanger being connected to the air inlet of the photocatalytic desorption tower.
3. The apparatus according to claim 1, wherein the heat exchanging system comprises a steam line and a condensate recovery line connected to the resin adsorption tank, and a blower connected to the inlet of the photocatalytic desorption tower, and the upper and lower parts of the resin adsorption tank are respectively provided with a hot steam inlet and a condensate outlet.
4. The device for purifying organic waste gas according to claim 1, wherein the circulating photocatalytic device further comprises a nitrogen purging system for purging the resin adsorption tank with nitrogen, the resin adsorption tank is correspondingly provided with a nitrogen inlet, and purged nitrogen is discharged through a circulating gas outlet of the resin adsorption tank.
5. The apparatus according to claim 1, wherein a coarse and medium-efficiency filter is installed in the static pressure filter apparatus.
6. The device for purifying organic waste gas according to claim 1, wherein the photocatalytic purifying tower and the photocatalytic desorbing tower each comprise a tower body, a plurality of groups of photoreaction modules arranged in the tower body, and a cleaning module; wherein, the liquid crystal display device comprises a liquid crystal display device,
the left end and the right end of the tower body are respectively provided with an air inlet and an air outlet, the bottom of the tower body is provided with a liquid outlet, and the photoreaction modules are arranged at intervals along the gas flow direction in the tower body; the cleaning module comprises a plurality of spraying pipelines arranged between the adjacent photoreaction modules, a cleaning water tank and a water pump which are arranged on the outer side of the tower body, and a plurality of cleaning spray heads are arranged on each spraying pipeline at intervals; and the water in the cleaning water tank is conveyed into each spraying pipeline through a pipeline under the action of a water pump and is sprayed out through the cleaning spray heads.
7. The apparatus according to claim 6, wherein the photoreaction module comprises an ultraviolet lamp and a photocatalyst layer.
8. The apparatus according to claim 1, wherein the resin adsorption tank is filled with a large-pore-size adsorption resin for adsorbing organic matters which are not completely degraded by the photocatalytic purification tower.
9. The apparatus according to claim 8, wherein the middle parts in the resin adsorption tanks are provided with a tube array, and the tube array is filled with a large-aperture adsorption resin; the waste gas inlet and the circulating gas inlet of the resin adsorption tank are formed in the lower portion of the resin adsorption tank, and the waste gas outlet and the circulating gas outlet are formed in the upper portion of the resin adsorption tank.
10. The device for purifying organic waste gas according to claim 1, wherein a main fan is installed at an air inlet of the exhaust chimney, and a VOCs detector is installed near an outlet of the exhaust chimney; the VOCs detector and O are also arranged on the pipeline connected with the circulating gas outlet of the resin adsorption tank and the photocatalytic desorption tower 3 And a detector.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223520015.XU CN219252222U (en) | 2022-12-28 | 2022-12-28 | Organic waste gas purifying device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223520015.XU CN219252222U (en) | 2022-12-28 | 2022-12-28 | Organic waste gas purifying device |
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| CN219252222U true CN219252222U (en) | 2023-06-27 |
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| CN202223520015.XU Active CN219252222U (en) | 2022-12-28 | 2022-12-28 | Organic waste gas purifying device |
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