CN216367406U - VOC exhaust treatment device - Google Patents

Abstract

The utility model discloses a VOC waste gas treatment device, and belongs to the technical field of VOC waste gas treatment. The temperature and humidity feedback regulation system comprises an intelligent control cabinet, a temperature and humidity measurement module and a regulation module, wherein the temperature and humidity measurement module and the regulation module are electrically connected with the intelligent control cabinet and are arranged on an air inlet pipe; the VOC degradation box body is used for carrying out photocatalytic degradation on VOC waste gas; the ozone degradation box is used for secondary degradation of VOC waste gas and degradation of ozone generated during degradation of the VOC waste gas. The device provided by the utility model can effectively degrade VOC waste gas, has high catalytic rate and conversion efficiency, does not contain ozone after treatment, and does not cause secondary pollution to the atmosphere.

Description

VOC exhaust treatment device

Technical Field

The utility model belongs to the technical field of VOC waste gas treatment, and particularly relates to a VOC waste gas treatment device.

Background

The atmosphere contains more Volatile Organic Compounds (VOC), which not only threatens the life and health of human body, but also forms photochemical smog with nitrogen oxides in the atmosphere under the action of sunlight to cause secondary pollution to the environment. Therefore, in a factory which is relatively easy to generate volatile organic compounds, an exhaust gas treatment device is used for treating the exhaust gas before the exhaust gas is discharged.

The photocatalytic oxidation degradation of volatile organic compounds is used as a green and environment-friendly treatment method, and the main working principle is as follows: under the excitation of photon energy, electrons transit from a valence band to the position of a conduction band to form photo-generated electrons in the conduction band and photo-generated holes in the valence band, and oxygen and water molecules are excited into free radicals with strong oxidizing capability such as superoxide radicals, hydroxyl free radicals and the like by utilizing the reduction performance of the oxidation of electron-hole pairs, so that volatile organic compounds in the environment are degraded.

The existing VOC waste gas treatment equipment based on a photocatalysis method mainly comprises a light source-ultraviolet lamp tube, a catalytic plate air inlet, an air outlet and a gas passing hole which is vertical to the catalytic plate. The waste gas containing volatile organic compounds enters from the gas inlet, the volatile organic compounds react with the catalytic plate excited by the light source, and the treated waste gas is discharged from the gas outlet. Two problems exist in such a device, namely, because of the existence of the channel through which the airflow can directly pass, the contact area of the exhaust gas and the catalytic plate and the residence time of the exhaust gas on the catalytic plate are greatly reduced according to the flow characteristics of the fluid; secondly, in order to improve the activity of the catalyst, the current photocatalytic oxidation device usually selects an ultraviolet lamp tube with a smaller wavelength, such as an ozone type ultraviolet lamp tube with a wavelength of 185nm, and because ozone generated by the ozone type ultraviolet lamp tube cannot be completely consumed in the photocatalytic oxidation process, the emission of ozone-containing tail gas to the environment can cause secondary pollution.

Through search, the Chinese patent application numbers are: 201810606821.8, filing date: 6, 13 months in 2018, the name of the utility model is: a waste gas treatment device for particle Volatile Organic Compounds (VOCs). The waste gas treatment device disclosed in the application comprises a waste gas cylinder shell, an air inlet, an air outlet, a connecting flange, a filtering section, a temperature and humidity control section, a control device, a photocatalytic oxidation section, a sensor, a heating rod, a humidifier, a high-energy ultraviolet lamp, an impurity discharge hole, a filter screen and a support, wherein the waste gas cylinder shell is arranged on the upper part of the support; the air inlet is arranged at the left end of the waste gas cylinder shell; the air outlet is arranged at the right end of the waste gas cylinder shell; the connecting flanges are respectively arranged at the outer ends of the air inlet and the air outlet; the filtering section is arranged on the left side of the temperature and humidity control section. This application is through setting up controlling means, sensor, heating rod, humidifier and high energy ultraviolet lamp for improve exhaust-gas treatment's intelligent degree, help improving catalytic reaction rate and conversion efficiency, make the gas of handling obtain abundant oxidation in next stage. However, when the high-energy ultraviolet lamp is used for carrying out photocatalytic treatment on the VOCs waste gas, the waste gas treatment device of the application still inevitably generates ozone, and the generated ozone is not treated by related treatment equipment, so that secondary pollution is very easily caused.

For another example, the chinese patent application No. is: 201720931753.3, filing date: 7, 28 months in 2017, the name of the utility model is: a microwave electrodeless photooxidation, plasma and photocatalysis combined waste gas treatment system. The abatement system of this application includes a housing, the housing including an air inlet and an air outlet; a filtering module, a low-temperature plasma module, a photo-oxidation module, a microwave stepless pipe module, a photo-catalysis module and an ozone elimination module are sequentially arranged between the air inlet and the air outlet, the air inlet is provided with a temperature and humidity sensor detection module, and the air outlet is provided with a VOC (volatile organic compound) detection unit; and a temperature adjusting device is also arranged between the filtering module and the low-temperature plasma module. This application has increased the ozone elimination module on conventional exhaust-gas treatment module's basis, can eliminate the ozone that produces among the photocatalysis process, has solved the secondary pollution problem that leads to by ozone production that administers the device existence in the first application effectively. However, each module of the application is installed in a housing (equivalent to an exhaust gas treatment cylinder), and when a certain module needs to be cleaned or fails, the maintenance and the replacement are inconvenient, and the treatment system has more modules for treating exhaust gas, and the manufacturing cost is relatively high, so that the industrial popularization and the use are difficult.

SUMMERY OF THE UTILITY MODEL

1. Problems to be solved

The utility model aims to overcome the defects that the prior VOC waste gas treatment equipment has low catalytic efficiency and relatively poor treatment effect when used for treating industrial tail gas, and ozone is easily generated in the treatment process to cause secondary pollution to the atmosphere, and provides a VOC waste gas treatment device. The technical scheme of the utility model can effectively solve the problems, remarkably improve the catalytic reaction rate and the conversion efficiency, has simple structure and low manufacturing cost, and is suitable for industrial popularization and use.

2. Technical scheme

In order to solve the problems, the technical scheme adopted by the utility model is as follows:

the VOC waste gas treatment device comprises a temperature and humidity feedback regulation system, a VOC degradation box body and an ozone degradation box body, wherein the temperature and humidity feedback regulation system comprises an intelligent control cabinet, a temperature and humidity measurement module and a temperature and humidity regulation module, the temperature and humidity measurement module is respectively installed at the front end and the tail end of an air inlet pipe, is electrically connected with the intelligent control cabinet and is used for detecting the temperature and humidity of waste gas at the front end and the tail end of the air inlet pipe; the temperature and humidity adjusting module is arranged on an air inlet pipe between the two temperature and humidity measuring modules, is electrically connected with the intelligent control cabinet and is used for adjusting the temperature and humidity of the waste gas in the air inlet pipe; the air inlet of the VOC degradation box body is connected with the tail end of the air inlet pipe, the air outlet of the VOC degradation box body is connected with the air inlet of the ozone degradation box body through an air conveying pipe, and the VOC degradation box body is used for carrying out photocatalytic degradation on VOC waste gas; the ozone degradation box is used for secondary degradation of VOC waste gas and degradation of ozone generated during degradation of the VOC waste gas.

Furthermore, the top and the bottom of the VOC degradation box body are processed into conical structures, an air distribution plate is arranged at an air inlet at the bottom of the VOC degradation box body, and an ozone type ultraviolet lamp tube and a photocatalyst are arranged in an inner cavity of the VOC degradation box body; the integral appearance of the ozone degradation box body is the same as that of the VOC degradation box body, an air distribution plate is arranged at an air inlet at the bottom of the ozone degradation box body, and an ozone-free ultraviolet lamp tube and a photocatalyst are arranged in an inner cavity of the ozone degradation box body.

The framework and the cloth bag are respectively arranged at the top of the VOC degradation box body and the top of the ozone degradation box body and used for installing the ozone type ultraviolet lamp tube, the ozone-free type ultraviolet lamp tube and the cloth bag; the cloth bag is used for packaging the photocatalyst.

Furthermore, the ozone type ultraviolet lamp tube and the ozone-free type ultraviolet lamp tube respectively comprise a plurality of tubes which are respectively and correspondingly arranged on the framework in the VOC degradation box body and the ozone degradation box body; the cloth bag also comprises a plurality of independent bag bodies, and each cloth bag and the catalyst are positioned between two adjacent ultraviolet lamp tubes.

Furthermore, the cloth bag is an activated carbon fiber cloth bag which is of a strip-shaped structure and is distributed along the length direction of the ultraviolet lamp tube.

Furthermore, the temperature and humidity measuring module comprises a temperature detecting element and a humidity detecting element, and the temperature and humidity adjusting module comprises a heating pipe and a humidifying pipe.

Furthermore, the temperature detection element adopts a thermometer, and the humidity detection element adopts a hygrometer.

Furthermore, a resistance wire and a fixing plate are arranged in the heating pipe, the fixing plate is symmetrically arranged on the upper side and the lower side of the heating pipe, and the resistance wire is arranged on the fixing plate.

Furthermore, a water tank and an ultrasonic atomizer are arranged in the humidifying pipe, and the ultrasonic atomizer is arranged on the upper portion of the water tank through a mounting plate.

Furthermore, a resistance wire is arranged in the water tank and used for heating water in the water tank.

3. Advantageous effects

Compared with the prior art, the utility model has the beneficial effects that:

(1) the VOC waste gas treatment device comprises a temperature and humidity feedback regulation system, a VOC degradation box body and an ozone degradation box body, and the whole structure of the device is optimally designed, so that on one hand, the temperature and humidity feedback regulation system is arranged on the gas inlet pipe, the temperature and humidity of waste gas can be controlled, a proper treatment working condition is provided for the subsequent waste gas degradation, and the catalytic degradation effect is improved. On the other hand, the intake pipe loops through the VOC degradation box, and gas delivery pipe links to each other with the ozone degradation box, through the setting of two independent degradation boxes, can effectively guarantee the degradation effect to VOC waste gas, not only can carry out secondary catalytic degradation to waste gas, but also can degrade the ozone that once degrades the in-process and produce, has improved catalytic reaction rate and conversion efficiency greatly, makes the rapid degradation of pollutants.

(2) According to the VOC waste gas treatment device, the structure of the degradation box body, the type, the number and the distribution of the ultraviolet lamps and the contact mode of the photocatalyst and the ultraviolet lamps are designed, so that the catalytic degradation effect can be effectively ensured, and the catalytic rate is improved. Meanwhile, the air distribution plates 9 are arranged in the degradation box body, so that waste gas entering the degradation box body for treatment can be guided conveniently, the waste gas can uniformly enter the degradation box body for treatment, the reaction speed is increased, and the treatment capacity of the equipment is effectively enhanced.

(3) According to the VOC waste gas treatment device, the temperature and humidity feedback regulation system comprises the intelligent control cabinet, the temperature and humidity measurement modules and the temperature and humidity regulation modules, the temperature and humidity measurement modules are arranged in two groups and are respectively arranged at the front end and the rear end of the air inlet pipe, so that feedback regulation of heating and humidifying waste gas is realized, control over the subsequent catalytic degradation reaction working conditions is further guaranteed, intelligent control over the temperature and humidity of the waste gas is effectively realized, and the device is simple to operate and low in maintenance cost.

Drawings

Fig. 1 is a schematic view of the overall structure of the VOC exhaust gas treatment device of the present invention.

In the figure:

1. an intelligent control cabinet; 2. a thermometer; 3. a hygrometer; 4. a resistance wire; 5. a fixing plate; 6. a water tank; 7. an ultrasonic atomizer; 8. mounting a plate; 9. a wind distribution plate; 10. a cloth bag of activated carbon fiber; 11. an ultraviolet lamp; 12. and (3) a framework.

Detailed Description

The utility model is further described with reference to specific examples.

Example 1

As shown in fig. 1, the VOC exhaust treatment device of this embodiment includes humiture feedback control system, VOC degradation box and ozone degradation box, humiture feedback control system wholly locates on the waste gas intake pipe for adjust and control the temperature and the humidity of waste gas, and it specifically includes intelligent control cabinet 1, temperature and humidity measurement module and temperature and humidity control module. Temperature and humidity measurement module includes two sets ofly, locates the front end and the tail end of intake pipe respectively, and it mainly includes temperature detect element and humidity detection element, temperature detect element can adopt thermometer 2, and humidity detection element can adopt hygrometer 3, and thermometer 2 and hygrometer 3 equally divide respectively with intelligent control cabinet 1 electric connection for after detecting the temperature and the humidity of waste gas, handle in feeding back the detected signal to intelligent control cabinet 1.

The temperature and humidity adjusting module is located between the two sets of temperature and humidity measuring modules and arranged in the middle of the air inlet pipe, and comprises a heating pipe and a humidifying pipe which are connected with the air inlet pipe, and the heating pipe and the humidifying pipe are electrically connected with the intelligent control cabinet 1 respectively. Before carrying out exhaust-gas treatment, thermometer 2 among the first set of temperature and humidity measurement module of exhaust-gas inlet pipe front end measures the temperature of waste gas, handle temperature data transmission to intelligent control cabinet 1, by if the temperature is less than the settlement temperature, then heat by the control module drive heating pipe among the intelligent control cabinet 1, the drive humidifying pipe carries out the humidification, and simultaneously, intelligent control cabinet 1 still can be through temperature and humidity data that temperature and humidity measurement module measured, the degree of heating is controlled through the mode of control heating pipe, and is corresponding, also can control the degree of humidification through the mode of control humidifying pipe. In addition, more preferably, the tail part of the air inlet pipe is also provided with a group of temperature and humidity measurement modules, so that the temperature and the humidity of the gas in the air inlet pipe can be simultaneously fed back to the intelligent control cabinet 1, the temperature and humidity regulation modules can be subjected to feedback regulation according to feedback data, closed-loop control is realized, the automation degree of heating and humidifying control of waste gas is improved, the temperature and the humidity of the waste gas in the air inlet pipe are regulated, and the subsequent photocatalytic degradation treatment of VOC is facilitated. It should be noted that the intelligent control cabinet 1 adopted in the present invention can adopt any existing control processor, and its main function is to process the data detected by the temperature and humidity detection module, and control the temperature and humidity adjustment module to work according to the data, and at the same time, can also perform feedback adjustment on the temperature and humidity adjustment module according to the temperature and humidity data measured twice (for example, a greenhouse control system provided in patent application No. 202120665736.6 can be adopted).

The VOC degradation box is internally provided with an ultraviolet lamp 11 and a photocatalyst, the bottom and the top of the VOC degradation box are processed into conical structures, a conical air inlet at the bottom is connected with the tail end of an exhaust pipe, a conical air outlet at the top is connected with an air inlet at the bottom of the ozone degradation box through an air conveying pipe, the structure of the ozone degradation box is basically the same as that of the VOC degradation box, the main difference is that the lamp tubes of the ultraviolet lamp 11 are different in specific selection, the ultraviolet lamp 11 in the VOC degradation box is an ozone type ultraviolet VOC lamp tube which can efficiently degrade waste gas, the ultraviolet lamp 11 in the ozone degradation box is an ozone-free type ultraviolet lamp tube, the ultraviolet lamp 11 in the VOC degradation box is irradiated and decomposed by weak ultraviolet light to generate strong oxidative free radicals to degrade incompletely-degraded micromolecular organic matters in the VOC degradation box, the VOC degradation effect is further improved, and the ozone generated in the degradation process is eliminated, effectively avoiding secondary pollution to the atmosphere. During the use, the industrial exhaust that contains VOC gets into the intake pipe, temperature and humidity measurement module detects the temperature and the humidity of tail gas, will detect data transmission to intelligent control cabinet 1 in, and then control temperature and humidity control module carries out work, heat and/or humidification treatment to tail gas, the waste gas after the processing continues to transmit to second group temperature and humidity measurement module department, to the temperature of waste gas, humidity data secondary acquisition, and with data feedback to intelligent control cabinet 1 come to carry out feedback control to temperature and humidity control module's work. Waste gas gets into in the VOC degradation box, it filters to carry out first round degradation under the catalytic action of shining and photocatalyst of ultraviolet lamp 11, waste gas after VOC degradation box processing passes through gas delivery pipe and gets into the ozone degradation box, ultraviolet lamp 11 at the non-ozone type shines down carries out second round degradation, and simultaneously, and degrade the ozone that produces when degrading first round, thereby guarantee not only do not contain VOC waste gas from ozone degradation box top gas vent combustion gas at last, also do not contain ozone, satisfy the exhaust emission index. Through before degrading VOC waste gas, through the setting of humiture feedback control system, can provide suitable reaction condition for the subsequent photocatalytic degradation of waste gas to be favorable to improving catalytic efficiency and effect.

Example 2

As shown in fig. 1, the structure of the VOC exhaust gas treatment device of this embodiment is basically the same as that of embodiment 1, and the main differences are: the top and the bottom of the VOC degradation box body and the ozone degradation box body are processed into conical structures, and the air distribution plate 9 is arranged at the air inlet at the bottom. The ultraviolet lamp 11 and the photocatalyst are arranged in the degradation box body and used for degrading waste gas, wherein the ultraviolet lamp 11 arranged in the VOC degradation box body is an ozone type ultraviolet lamp tube, so that the activity of the catalyst can be effectively ensured, the degradation effect and efficiency are improved, and the treatment cost is saved; for further degradation waste gas and handle the ozone that degradation VOC waste gas self produced in the VOC degradation box, ultraviolet lamp 11 in the ozone degradation box chooses for use no ozone type ultraviolet fluorescent tube, through selecting 11 kinds of ultraviolet lamp to the different grade type, can make the VOC waste gas take place catalytic degradation under the shining of strong ultraviolet light, tail gas after the catalytic degradation gets into in the ozone degradation box by secondary filter, simultaneously, utilize weak ultraviolet irradiation to decompose by the ozone that produces in the VOC degradation box, the complete micromolecular organic matter in the interior defence Xinjiang street of VOC degradation box is further degraded to the free radical of the strong oxidizing property of production, compared with current traditional VOC tail gas processing apparatus, the degradation is more complete more thoroughly, the waste gas after the processing discharges and does not contain ozone, can not cause secondary pollution to the atmosphere.

More optimally, the top of the VOC degradation box body and the top of the ozone degradation box body are also provided with a framework 12, the ultraviolet lamp 11 comprises a plurality of identical lamp tubes, and the lamp tubes are arranged in the degradation box body (comprising the VOC degradation box body and the ozone degradation box body) and are arranged on the framework 12. Photocatalyst adopts the sack to pack, and the sack includes a plurality of independent bag bodies, and every sack is hung on skeleton 12, is the bar structure and distributes along 11 length direction of ultraviolet lamp, designs through the contact form to 11 quantity of ultraviolet lamp and distribution, catalyst and ultraviolet lamp 11 to can improve waste gas and photocatalyst's area of contact, guarantee the catalytic degradation effect, and is further, the sack adopts activated carbon fiber sack 10, can also play the filtration to dust particulate matter, can also effectively adsorb other foul smell in the waste gas, thereby improves the degradation treatment effect of waste gas.

Example 3

As shown in fig. 1, the structure of the VOC exhaust gas treatment device of this embodiment is basically the same as that of embodiment 2, and the main differences are: a resistance wire 4 and a fixing plate 5 are arranged in the heating pipe, the fixing plate 5 is symmetrically arranged on the upper side and the lower side of the heating pipe, and the resistance wire 4 is arranged on the fixing plate 5. The heating pipe is arranged on the air inlet pipe, when heating is needed, the resistance wire 4 is controlled to work and generate heat, and waste gas enters the heating pipe from the air inlet pipe to be heated.

Be equipped with water tank 6 and ultrasonic atomizer 7 in the humidifying pipe, ultrasonic atomizer 7 passes through mounting panel 8 and locates 6 upper portions of water tank. When needing to carry out humidification treatment to waste gas, atomize through ultrasonic atomization ware 7 with the water in the water tank, waste gas can carry the water smoke when humidifying the pipe to the humidity control to waste gas has been realized. More optimally, the humidifying pipe is also internally provided with a heating resistance wire 4, so that the temperature of water vapor can be controlled during humidification, and the appropriate heating is also beneficial to rapid volatilization of water, thereby rapidly realizing the humidifying effect on waste gas.

The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the utility model, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the utility model.

Claims (10)

1. The utility model provides a VOC exhaust treatment device which characterized in that: the system comprises a temperature and humidity feedback adjusting system, a VOC degradation box body and an ozone degradation box body, wherein the temperature and humidity feedback adjusting system comprises an intelligent control cabinet (1), a temperature and humidity measuring module and a temperature and humidity adjusting module, the temperature and humidity measuring module is respectively installed at the front end and the tail end of an air inlet pipe, is electrically connected with the intelligent control cabinet (1), and is used for detecting the temperature and humidity of waste gas at the front end and the tail end of the air inlet pipe; the temperature and humidity adjusting module is arranged on an air inlet pipe between the two temperature and humidity measuring modules, is electrically connected with the intelligent control cabinet (1), and is used for adjusting the temperature and humidity of waste gas in the air inlet pipe; the air inlet of the VOC degradation box body is connected with the tail end of the air inlet pipe, the air outlet of the VOC degradation box body is connected with the air inlet of the ozone degradation box body through an air conveying pipe, and the VOC degradation box body is used for carrying out photocatalytic degradation on VOC waste gas; the ozone degradation box is used for secondary degradation of VOC waste gas and degradation of ozone generated during degradation of the VOC waste gas.

2. A VOC exhaust treatment device according to claim 1, wherein: the top and the bottom of the VOC degradation box body are processed into conical structures, an air distribution plate (9) is arranged at an air inlet at the bottom of the VOC degradation box body, and an ozone type ultraviolet lamp tube and a photocatalyst are arranged in an inner cavity of the VOC degradation box body; the integral appearance of the ozone degradation box body is the same as that of the VOC degradation box body, an air distribution plate (9) is arranged at an air inlet at the bottom of the ozone degradation box body, and an ozone-free ultraviolet lamp tube and a photocatalyst are arranged in an inner cavity of the ozone degradation box body.

3. A VOC exhaust treatment device according to claim 2, wherein: the framework (12) is respectively arranged at the top of the VOC degradation box body and the top of the ozone degradation box body and is used for installing an ozone type ultraviolet lamp tube, an ozone-free type ultraviolet lamp tube and a cloth bag; the cloth bag is used for packaging the photocatalyst.

4. A VOC exhaust treatment device according to claim 3, wherein: the ozone type ultraviolet lamp tubes and the ozone-free type ultraviolet lamp tubes are respectively and correspondingly arranged on the VOC degradation box body and a framework (12) in the ozone degradation box body; the cloth bag also comprises a plurality of independent bag bodies, and each cloth bag and the catalyst are positioned between two adjacent ultraviolet lamp tubes.

5. A VOC exhaust gas treatment device as claimed in claim 4, wherein: the cloth bag is an activated carbon fiber cloth bag (10) which is of a strip-shaped structure and is distributed along the length direction of the ultraviolet lamp tube.

6. A VOC exhaust gas treatment device as claimed in any one of claims 1-5, wherein: the temperature and humidity measuring module comprises a temperature detecting element and a humidity detecting element, and the temperature and humidity adjusting module comprises a heating pipe and a humidifying pipe.

7. A VOC exhaust gas treatment device as claimed in claim 6, wherein: the temperature detection element adopts a thermometer (2), and the humidity detection element adopts a hygrometer (3).

8. A VOC exhaust gas treatment device as claimed in claim 6, wherein: a resistance wire (4) and a fixing plate (5) are arranged in the heating pipe, the fixing plate (5) is symmetrically arranged on the upper side and the lower side of the heating pipe, and the resistance wire (4) is arranged on the fixing plate (5).

9. A VOC exhaust gas treatment device as claimed in claim 6, wherein: be equipped with water tank (6) and ultrasonic nebulizer (7) in the humidifying pipe, ultrasonic nebulizer (7) are located water tank (6) upper portion through mounting panel (8).

10. A VOC exhaust treatment device according to claim 9, wherein: and a resistance wire (4) is also arranged in the water tank (6) and is used for heating the water in the water tank (6).

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