CN112546860A - VOCs waste gas pretreatment device and pretreatment method - Google Patents
VOCs waste gas pretreatment device and pretreatment method Download PDFInfo
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- CN112546860A CN112546860A CN202011591987.0A CN202011591987A CN112546860A CN 112546860 A CN112546860 A CN 112546860A CN 202011591987 A CN202011591987 A CN 202011591987A CN 112546860 A CN112546860 A CN 112546860A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8678—Removing components of undefined structure
- B01D53/8687—Organic components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/30—Controlling by gas-analysis apparatus
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/093—Cleaning containers, e.g. tanks by the force of jets or sprays
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
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Abstract
本发明公开了一种VOCs废气预处理装置及预处理方法，涉及废气净化处理设备技术领域。本发明包括废气光催化氧化分解设备、预处理壳体和第一废气输送管道。本发明通过混合驱动电机、螺旋叶片、废气导流板和分隔网之间的相互配合，增加了废气在装置中流动的行程，同时使得废气与预处理液充分接触，使得废气中的颗粒物分离更加彻底，提高了装置的颗粒物分离效果,通过箱式离心风机、气体监测仪、储液箱、第一液位调节水泵和第二液位调节水泵之间的相互配合，使得装置可以调节预处理后的废气的湿度，便于光催化氧化设备对VOCs废气的分解，通过冲洗水泵和冲洗水嘴之间的相互配合，使得装置可以对内部进行清洗，避免残留的颗粒物腐蚀装置。
The invention discloses a VOCs waste gas pretreatment device and a pretreatment method, and relates to the technical field of waste gas purification treatment equipment. The invention includes exhaust gas photocatalytic oxidation and decomposition equipment, a pretreatment shell and a first exhaust gas conveying pipeline. The invention increases the stroke of the exhaust gas flowing in the device through the cooperation between the hybrid drive motor, the helical blade, the exhaust gas guide plate and the separation net, and at the same time makes the exhaust gas and the pretreatment liquid fully contact, so that the separation of particulate matter in the exhaust gas is more efficient. Thoroughly, the particle separation effect of the device is improved. Through the cooperation between the box-type centrifugal fan, the gas monitor, the liquid storage tank, the first liquid level adjustment water pump and the second liquid level adjustment water pump, the device can adjust the pretreatment. The high humidity of the exhaust gas is convenient for the photocatalytic oxidation equipment to decompose the VOCs exhaust gas. Through the cooperation between the flushing water pump and the flushing nozzle, the device can clean the interior to avoid residual particulate matter from corroding the device.
Description
Technical Field
The invention belongs to the technical field of waste gas purification treatment equipment, and particularly relates to a VOCs waste gas pretreatment device and a pretreatment method.
Background
VOCs are a general term for volatile organic compounds, and mainly include non-methane total hydrocarbons (alkanes, alkenes, alkynes, aromatics), oxygen-containing organic compounds (aldehydes, ketones, alcohols, ethers, etc.), halogenated hydrocarbons, nitrogen-containing compounds, sulfur-containing compounds, and the like. VOCs can be volatilized and have active properties, so that the VOCs can participate in atmospheric photochemical reaction to generate harmful substances, and great harm is caused to the environment and human beings.
There are two sources of VOCs, namely natural sources and artificial sources, and the artificial sources are mainly industrial emission and domestic emission. The life emission approaches mainly include automobile exhaust, home decoration, straw combustion, kitchen oil smoke and the like; more than half of the sources are also industrial emissions. The industries discharging more VOCs include petrochemical industry, packaging printing, pharmacy, automobile spraying and the like.
The technologies for treating the waste gas containing VOCs also have many technologies, mainly including adsorption, catalytic combustion, biological treatment, photocatalytic oxidation technology, electrocatalytic oxidation technology, supercritical water oxidation technology, plasma technology, ultrasonic oxidation technology, microwave radiation technology and high-voltage pulse discharge technology, wherein the photocatalytic oxidation technology has purification capability on almost all pollutants.
VOCs waste gas is because of containing the particulate matter etc, need the preliminary treatment then get into subsequent treatment technology, the particulate matter that the preprocessing device in to VOCs waste gas that sprays is utilized to carry out the preliminary treatment mostly among the prior art, however, waste gas is shorter in the stroke that sprays the preprocessing device and flow among the current device, waste gas and pretreatment liquid contact are abundant inadequately, make the particulate matter separation thoroughly inadequately, the particulate matter separation effect of device has been reduced, and the humidity of waste gas behind the current device can't adjust the preliminary treatment, the photocatalytic oxidation equipment of being not convenient for is administered the decomposition of VOCs waste gas.
Disclosure of Invention
The invention aims to provide a VOCs waste gas pretreatment device, which solves the existing problems: the stroke that waste gas flowed in spraying preprocessing device is shorter among the current device, and waste gas and pretreatment liquid contact are abundant inadequately for particulate matter separation is thorough inadequately, has reduced the particulate matter separation effect of device.
In order to solve the technical problems, the invention is realized by the following technical scheme:
in one aspect, the invention provides a VOCs waste gas pretreatment device, which comprises a waste gas photocatalytic oxidation decomposition device, a pretreatment shell and a first waste gas conveying pipeline, the pretreatment shell is positioned at one end of the waste gas photocatalytic oxidation decomposition equipment, the first waste gas conveying pipeline is fixed between the waste gas photocatalytic oxidation decomposition equipment and the pretreatment shell, a driving cavity and a waste gas pretreatment cavity are sequentially arranged in the pretreatment shell from the bottom to the top, a hybrid driving motor is fixed in the driving cavity, a driving bevel gear is fixed at the output end of the hybrid driving motor, the bottom of the driving conical gear is provided with a driven conical gear, the interior of the driven conical gear is welded and connected with a central shaft rod, the pretreatment shell is rotatably connected with a central shaft rod, and the top of the central shaft rod and the inside of the waste gas pretreatment cavity are connected with helical blades in a welding manner;
a plurality of waste gas guide plates are obliquely fixed in the waste gas pretreatment cavity from the top to the bottom, two adjacent waste gas guide plates are fixed in opposite directions, and a separation net is fixed in each waste gas guide plate;
a box-type centrifugal fan is arranged at one end of the pretreatment shell, which is far away from the photocatalytic oxidation decomposition equipment for the waste gas, a second waste gas conveying pipeline is fixed at one end of the box-type centrifugal fan, and a third waste gas conveying pipeline is fixed between the pretreatment shell and the box-type centrifugal fan;
and a gas monitor is fixed at the top of the first waste gas conveying pipeline.
Further, the driving bevel gear and the driven bevel gear are in meshed connection.
Further, the preconditioning shell and the central shaft are rotationally coupled by ball bearings.
Furthermore, the inclination angle range of the waste gas guide plate is 10-50 degrees.
Furthermore, a plurality of supporting feet are uniformly distributed and fixed at the bottom of the pretreatment shell.
Furthermore, the bottom of the supporting bottom foot is connected with a non-slip mat through bonding, and a plurality of non-slip lines are uniformly distributed at the bottom of the non-slip mat.
Furthermore, one side of preliminary treatment casing is provided with the liquid reserve tank, the top of liquid reserve tank has been seted up and has been annotated the liquid hole and wash the liquid hole of taking out, the outage has been seted up to the one end of liquid reserve tank, the both sides of liquid reserve tank are provided with first liquid level control hole and second liquid level control hole respectively.
Further, the lower end of the outer side of the pretreatment shell is provided with a liquid level adjusting water injection hole and a liquid level adjusting water drainage hole, a first liquid level regulating water pump and a second liquid level regulating water pump are respectively arranged at the two ends of the liquid storage tank, the input end of the first liquid level adjusting water pump is connected with the liquid level adjusting drain hole through a water pipe, and the output end of the first liquid level adjusting water pump is connected with the first liquid level adjusting hole through a water pipe, the input end of the second liquid level regulating water pump is connected with the second liquid level regulating hole through a water pipe, the output end of the second liquid level regulating water pump is connected with the liquid level regulating water injection hole through a water pipe, the top of the liquid storage tank is fixed with a controller, and the hybrid driving motor and the controller, the box type centrifugal fan and the controller, the gas monitor and the controller, the first liquid level adjusting water pump and the controller, and the second liquid level adjusting water pump and the controller are electrically connected through leads.
Further, the top of liquid reserve tank is fixed with wash water pump, just controller and wash water pump pass through wire electric connection, wash water pump's input and wash the drawing liquid hole and also be connected through the water pipe, the bottom of exhaust gas guide plate all is fixed with a plurality of washing water injection well choke, just wash water injection well choke and wash water pump's output and also be connected through the water pipe, a plurality of blowholes have been seted up to the outside equipartition of preliminary treatment casing, just the blowhole is located the top of the lower one end of exhaust gas guide plate, the inside of blowhole all is fixed with the blowoff valve.
On the other hand, the invention also provides a VOCs waste gas pretreatment method, which comprises the following steps:
s1: electrically connecting the device with an external power supply, and connecting one end of a second waste gas conveying pipeline with a VOCs waste gas discharge port;
s2: injecting pretreatment liquid into the liquid storage tank through the liquid injection hole, and starting a second liquid level regulating water pump through the controller to inject the pretreatment liquid into the pretreatment shell;
s3: starting a centrifugal fan inside the box type centrifugal fan through a controller, so that VOCs waste gas enters the inside of the pretreatment shell;
s4: the mixing driving motor is started through the controller, so that the helical blades rotate, the waste gas and the pretreatment liquid are fully mixed, the waste gas gradually floats upwards along the waste gas guide plate, and particulate matters in the waste gas are precipitated inside the pretreatment shell;
the separated waste gas enters the inside of the waste gas photocatalytic oxidation decomposition equipment through a first waste gas conveying pipeline for decomposition and oxidation, and when the pretreated waste gas flows through a gas monitor, the gas monitor monitors the humidity in the waste gas in real time;
s5: when the humidity of the waste gas exceeds the range of 30-65%, the controller controls the first liquid level adjusting water pump to start, so that the pretreatment liquid in the pretreatment shell is conveyed into the liquid storage tank, and meanwhile, the controller controls the box type centrifugal fan to improve the flow of the waste gas;
when the relative humidity of the waste gas is lower than the range of 30-65%, the gas monitor transmits a signal to the controller, the controller controls the second liquid level adjusting water pump to start, the pretreatment liquid in the liquid storage tank is conveyed to the interior of the pretreatment shell, and meanwhile, the controller controls the box type centrifugal fan to reduce the flow of the waste gas;
s6: when the particulate matter of gathering is depositd to the inside of preliminary treatment casing when needs wash, to the inside injection washing liquid of liquid reserve tank, open the blowoff valve, start the washing water pump through the controller, and then wash the particulate matter of gathering to waste gas guide plate surface deposit.
The invention has the following beneficial effects:
according to the invention, through the mutual matching of the hybrid driving motor and the helical blade, the waste gas is fully contacted with the pretreatment liquid, and the particle separation effect of the device is improved.
According to the invention, through the mutual cooperation of the box-type centrifugal fan, the gas monitor, the liquid storage tank, the first liquid level regulating water pump and the second liquid level regulating water pump, the device can regulate the humidity of the pretreated waste gas, and the decomposition of the VOCs waste gas by the photocatalytic oxidation equipment is facilitated.
The device can clean the inside by matching the flushing water pump and the flushing water nozzle, so that the device is prevented from being corroded by residual particles.
According to the invention, through the mutual matching between the exhaust gas guide plate and the separation net, the flow stroke in the exhaust gas recharging device is increased, so that the particulate matters in the exhaust gas are more thoroughly separated.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention as a whole;
FIG. 2 is a rear view of the overall structure of the present invention;
FIG. 3 is a left side view of the overall structure of the present invention;
FIG. 4 is a schematic view of the interior of the preconditioning tank;
FIG. 5 is an enlarged view of a portion of FIG. 4 at A;
FIG. 6 is a partial enlarged view of the portion B in FIG. 4;
FIG. 7 is a schematic view of the overall structure of the reservoir;
FIG. 8 is a left side view of the overall structure of the reservoir;
FIG. 9 is a schematic view of an assembly of an exhaust baffle and a separation screen;
fig. 10 is a schematic view of the structure of the separation net.
In the drawings, the components represented by the respective reference numerals are listed below:
1. the waste gas photocatalysis oxidation decomposition equipment; 2. pretreating the shell; 3. a first exhaust gas delivery conduit; 4. a drive chamber; 5. an exhaust gas pretreatment chamber; 6. a hybrid drive motor; 7. a driving bevel gear; 8. a driven bevel gear; 9. a central shaft; 10. a helical blade; 11. an exhaust gas baffle; 12. a separation net; 13. a box-type centrifugal fan; 14. a second exhaust gas delivery conduit; 15. a third waste gas conveying pipeline; 16. a gas monitor; 17. a liquid storage tank; 18. a liquid injection hole; 19. flushing the liquid pumping hole; 20. a drain hole; 21. a first liquid level regulating hole; 22. a second liquid level adjustment hole; 23. a first liquid level regulating water pump; 24. a second level regulating water pump; 25. a controller; 26. a water pump is flushed; 27. flushing a water nozzle; 28. a blowoff valve; 29. supporting the feet.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
the embodiment discloses a VOCs exhaust gas pretreatment device.
As shown in fig. 1 to 5, the apparatus includes an exhaust gas photocatalytic oxidation decomposition device 1, a pretreatment housing 2, and a first exhaust gas transport pipe 3, the pretreatment housing 2 being located at one end of the exhaust gas photocatalytic oxidation decomposition device 1, the first exhaust gas transport pipe 3 being fixed between the exhaust gas photocatalytic oxidation decomposition device 1 and the pretreatment housing 2.
Here, drive chamber 4 and exhaust gas preliminary treatment chamber 5 have been seted up from bottom to top in proper order to the inside of preliminary treatment casing 2, the inside of drive chamber 4 is fixed with hybrid drive motor 6, hybrid drive motor 6's output is fixed with initiative conical gear 7, the bottom of initiative conical gear 7 is connected with driven conical gear 8 through the meshing, driven conical gear 8's inside welded connection has central shaft 9, and preliminary treatment casing 2 and central shaft 9 rotate through ball bearing and connect, the top of central shaft 9 and the inside welded connection who is located exhaust gas preliminary treatment chamber 5 have helical blade 10.
As shown in fig. 4, 9 and 10, a plurality of exhaust gas guide plates 11 are obliquely fixed inside the exhaust gas pretreatment chamber 5 from top to bottom, two adjacent exhaust gas guide plates 11 are fixed in opposite directions, and a separation net 12 is fixed inside each exhaust gas guide plate 11.
Here, the inclination angle of the exhaust gas baffle 11 ranges from 10 to 50 degrees.
Herein, a plurality of supporting feet 29 are uniformly distributed and fixed at the bottom of the pretreatment shell 2, the bottom of the supporting feet 29 is connected with a non-slip mat through bonding, and a plurality of non-slip lines are uniformly distributed and arranged at the bottom of the non-slip mat.
As shown in fig. 1-3, a box-type centrifugal fan 13 is disposed at one end of the pretreatment housing 2 away from the photocatalytic oxidation decomposition device 1 for exhaust gas, a second exhaust gas conveying pipeline 14 is fixed at one end of the box-type centrifugal fan 13, and a third exhaust gas conveying pipeline 15 is fixed between the pretreatment housing 2 and the box-type centrifugal fan 13.
A gas monitor 16 is fixed on the top of the first exhaust gas conveying pipeline 3.
Here, the gas monitor 16 is preferably a LY804-SF6 gas monitor manufactured by Shenzhen industries, Inc.
As shown in fig. 7 and 8, a liquid storage tank 17 is disposed on one side of the pretreatment housing 2, a liquid injection hole 18 and a liquid flushing and pumping hole 19 are disposed on the top of the liquid storage tank 17, a liquid discharge hole 20 is disposed on one end of the liquid storage tank 17, and a first liquid level adjusting hole 21 and a second liquid level adjusting hole 22 are disposed on two sides of the liquid storage tank 17 respectively.
As shown in fig. 1-3, 7, and 8, a liquid level regulation water injection hole and a liquid level regulation water drain hole are formed at the lower end of the outer side of the pretreatment housing 2, a first liquid level regulation water pump 23 and a second liquid level regulation water pump 24 are respectively arranged at two ends of the liquid storage tank 17, an input end of the first liquid level regulation water pump 23 is connected with the liquid level regulation water drain hole through a water pipe, an output end of the first liquid level regulation water pump 23 is connected with the first liquid level regulation hole 21 through a water pipe, an input end of the second liquid level regulation water pump 24 is connected with the second liquid level regulation hole 22 through a water pipe, an output end of the second liquid level regulation water pump 24 is connected with the liquid level regulation water injection hole through a water pipe, a controller 25 is fixed at the top of the liquid storage tank 17, and a wire is arranged between the first liquid level regulation water pump 23 and the controller 25, the box-type centrifugal fan 13 and the controller 25, the gas monitor 16 and the controller 25, the first liquid level regulation water pump And (6) electrically connecting.
Here, the controller 25 is of the SC-200 universal type.
As shown in fig. 1-4 and 6, a washing water pump 26 is fixed at the top of the liquid storage tank 17, the controller 25 is electrically connected with the washing water pump 26 through a conducting wire, the input end of the washing water pump 26 is connected with the washing liquid pumping hole 19 through a water pipe, a plurality of washing water nozzles 27 are fixed at the bottom of the exhaust gas guide plate 11, the output ends of the washing water nozzles 27 and the washing water pump 26 are connected through a water pipe, a plurality of sewage discharging holes are uniformly distributed at the outer side of the pretreatment shell 2, the sewage discharging holes are located at the top of the lower end of the exhaust gas guide plate 11, a sewage discharging valve 28 is fixed inside the sewage discharging holes, and the cleaning of the particles precipitated and gathered inside the pretreatment shell 2 is.
Example two:
the embodiment discloses a pretreatment method adopting the VOCs waste gas pretreatment device.
Specifically, the method comprises the following steps:
the first step is as follows: electrically connecting the device with an external power supply, and connecting one end of a second waste gas conveying pipeline 14 with a VOCs waste gas discharge port;
the second step is that: injecting pretreatment liquid into the liquid storage tank 17 through the liquid injection hole 18, starting the second liquid level adjusting water pump 24 through the controller 25, so that the second liquid level adjusting water pump 24 operates, and injecting the pretreatment liquid in the liquid storage tank 17 into the pretreatment shell 2 through the operation of the second liquid level adjusting water pump 24;
the third step: starting a centrifugal fan inside the box-type centrifugal fan 13 through the controller 25 to enable the box-type centrifugal fan 13 to operate, and enabling the VOCs waste gas to sequentially enter the interior of the pretreatment shell 2 through the second waste gas conveying pipeline 14, the box-type centrifugal fan 13 and the third waste gas conveying pipeline 15 through the operation of the box-type centrifugal fan 13;
the fourth step: the hybrid driving motor 6 is started through the controller 25, so that the output end of the hybrid driving motor 6 rotates, the hybrid driving motor 6 drives the driving bevel gear 7 to rotate through the fixed connection of the hybrid driving motor 6 and the driving bevel gear 7, the driving bevel gear 7 drives the driven bevel gear 8 to rotate through the meshed connection of the driving bevel gear 7 and the driven bevel gear 8, the driven bevel gear 8 drives the central shaft 9 to rotate through the welded connection of the driven bevel gear 8 and the central shaft 9, the central shaft 9 drives the helical blade 10 to rotate through the welded connection of the central shaft 9 and the helical blade 10, further the waste gas entering the interior of the pretreatment shell 2 is stirred, the waste gas and the pretreatment liquid are fully mixed, and the waste gas can gradually float upwards along the waste gas guide plate 11 because the waste gas guide plate 11 is obliquely fixed, in the floating process, when the waste gas passes through the separation net 12, the waste gas is separated by the grids in the separation net 12, so that bubbles with larger volume are avoided, and further, the particulate matters in the waste gas are precipitated in the pretreatment shell 2, so that the device has better separation effect on the particulate matters in the waste gas;
the separated waste gas enters the waste gas photocatalytic oxidation decomposition equipment 1 through the first waste gas conveying pipeline 3 for decomposition and oxidation, and when the pretreated waste gas flows through the gas monitor 16, the gas monitor 16 monitors the humidity in the waste gas in real time;
the fifth step: when the humidity of the waste gas exceeds the range of 30-65%, the gas monitor 16 transmits a signal to the controller 25, the controller 25 controls the first liquid level adjusting water pump 23 to start, so that the first liquid level adjusting water pump 23 operates, the pretreatment liquid in the pretreatment shell 2 is conveyed to the liquid storage tank 17 through the operation of the first liquid level adjusting water pump 23, the liquid level of the pretreatment liquid in the pretreatment shell 2 is reduced, the contact time of the waste gas and the pretreatment liquid is shortened, and meanwhile, the controller 25 controls the box type centrifugal fan 13 to improve the flow of the waste gas, so that the relative humidity of the waste gas is reduced;
when the relative humidity of the waste gas is lower than the range of 30-65%, the gas monitor 16 transmits a signal to the controller 25, the controller 25 controls the second liquid level adjustment water pump 24 to be started, so that the second liquid level adjustment water pump 24 operates, the pretreatment liquid in the liquid storage tank 17 is conveyed to the interior of the pretreatment shell 2 through the operation of the second liquid level adjustment water pump 24, the liquid level of the pretreatment liquid in the pretreatment shell 2 is increased, the contact time of the waste gas and the pretreatment liquid is prolonged, and meanwhile, the controller 25 controls the box-type centrifugal fan 13 to reduce the flow of the waste gas, so that the relative humidity of the waste gas is increased;
and a sixth step: when the particulate matter of gathering is depositd to pretreatment housing 2 inside to needs washes, to the inside injection washing liquid of liquid reserve tank 17, open blowoff valve 28, start washing water pump 26 through controller 25, make washing water pump 26 operation, through washing water pump 26's operation, make the inside washing liquid of liquid reserve tank 17 spray to 11 surfaces of exhaust gas guide plate through washing water injection well choke 27, and then wash the particulate matter of gathering is depositd to 11 surfaces of exhaust gas guide plate, and then discharge the device outside through blowoff valve 28.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. The utility model provides a VOCs waste gas preprocessing device, includes waste gas photocatalysis oxidation decomposition equipment (1), preliminary treatment casing (2) and first waste gas pipeline (3), preliminary treatment casing (2) are located the one end of waste gas photocatalysis oxidation decomposition equipment (1), first waste gas pipeline (3) are fixed in between waste gas photocatalysis oxidation decomposition equipment (1) and preliminary treatment casing (2), its characterized in that, drive chamber (4) and waste gas preliminary treatment chamber (5) have been seted up in proper order to the top from the bottom in the inside of preliminary treatment casing (2), the inside of drive chamber (4) is fixed with hybrid drive motor (6), the output of hybrid drive motor (6) is fixed with initiative conical gear (7), the bottom of initiative conical gear (7) is equipped with driven conical gear (8), the inside welding of driven conical gear (8) is connected with central axostylus axostyle (9), the pretreatment shell (2) is rotationally connected with a central shaft lever (9), and a helical blade (10) is welded and connected to the top of the central shaft lever (9) and positioned inside the waste gas pretreatment cavity (5);
a plurality of waste gas guide plates (11) are obliquely fixed in the waste gas pretreatment cavity (5) from the top to the bottom, two adjacent waste gas guide plates (11) are fixed in opposite directions, and a separation net (12) is fixed in each waste gas guide plate (11);
a box-type centrifugal fan (13) is arranged at one end, far away from the waste gas photocatalytic oxidation decomposition device (1), of the pretreatment shell (2), a second waste gas conveying pipeline (14) is fixed at one end of the box-type centrifugal fan (13), and a third waste gas conveying pipeline (15) is fixed between the pretreatment shell (2) and the box-type centrifugal fan (13);
and a gas monitor (16) is fixed at the top of the first waste gas conveying pipeline (3).
2. A VOCs exhaust gas pretreatment device in accordance with claim 1, wherein said driving bevel gear (7) and driven bevel gear (8) are in meshing engagement.
3. A VOCs exhaust gas pretreatment device in accordance with claim 1, wherein the pretreatment housing (2) and the central shaft (9) are rotatably coupled by ball bearings.
4. A voc exhaust gas pretreatment device according to claim 1, wherein the exhaust baffle (11) is inclined at an angle ranging from 10 to 50 degrees.
5. A device for pretreating exhaust gases of VOCs according to claim 1, wherein a plurality of support feet (29) are uniformly fixed on the bottom of the pretreatment housing (2).
6. A VOCs exhaust gas pretreatment device according to claim 5, characterized in that the bottom of the support feet (29) is connected with a non-slip mat through bonding, and the bottom of the non-slip mat is uniformly provided with a plurality of non-slip lines.
7. A waste gas pretreatment device for VOCs (volatile organic compounds) according to claim 1, wherein a liquid storage tank (17) is disposed at one side of the pretreatment housing (2), a liquid injection hole (18) and a flushing liquid extraction hole (19) are disposed at the top of the liquid storage tank (17), a liquid discharge hole (20) is disposed at one end of the liquid storage tank (17), and a first liquid level adjusting hole (21) and a second liquid level adjusting hole (22) are disposed at two sides of the liquid storage tank (17), respectively.
8. The VOCs waste gas pretreatment device of claim 7, wherein a liquid level regulation water injection hole and a liquid level regulation water discharge hole are formed at the lower end of the outer side of the pretreatment housing (2), a first liquid level regulation water pump (23) and a second liquid level regulation water pump (24) are respectively arranged at the two ends of the liquid storage tank (17), the input end of the first liquid level regulation water pump (23) is connected with the liquid level regulation water discharge hole through a water pipe, the output end of the first liquid level regulation water pump (23) is connected with the first liquid level regulation hole (21) through a water pipe, the input end of the second liquid level regulation water pump (24) is connected with the second liquid level regulation hole (22) through a water pipe, the output end of the second liquid level regulation water pump (24) is connected with the liquid level regulation water injection hole through a water pipe, a controller (25) is fixed at the top of the liquid storage tank (17), and the hybrid driving motor (6) and the controller (25), the box-type centrifugal fan (13) and the controller (25), the gas monitor (16) and the controller (25), the first liquid level adjusting water pump (23) and the controller (25), and the second liquid level adjusting water pump (24) and the controller (25) are electrically connected through leads.
9. The VOCs waste gas pretreatment device of claim 8, wherein a rinse water pump (26) is fixed on the top of the liquid storage tank (17), the controller (25) and the rinse water pump (26) are electrically connected through a wire, the input end of the rinse water pump (26) is connected with the rinse liquid extraction hole (19) through a water pipe, a plurality of rinse water nozzles (27) are fixed on the bottom of the waste gas guide plate (11), the output ends of the rinse water nozzles (27) and the rinse water pump (26) are connected through a water pipe, a plurality of sewage discharge holes are uniformly formed in the outer side of the pretreatment shell (2), the sewage discharge holes are located on the top of the lower end of the waste gas guide plate (11), and a sewage discharge valve (28) is fixed inside each sewage discharge hole.
10. A pretreatment method using the apparatus for pretreating exhaust gases of VOCs according to any one of claims 1 to 9, comprising the steps of:
s1: electrically connecting the device with an external power supply, and connecting one end of a second waste gas conveying pipeline (14) with a VOCs waste gas discharge port;
s2: pre-treatment liquid is injected into the liquid storage tank (17) through the liquid injection hole (18), and a second liquid level adjusting water pump (24) is started through a controller (25), so that the pre-treatment liquid in the liquid storage tank (17) is injected into the pre-treatment shell (2);
s3: starting a centrifugal fan inside the box type centrifugal fan (13) through a controller (25) to enable VOCs waste gas to enter the pretreatment shell (2);
s4: the mixing driving motor (6) is started through the controller (25), so that the helical blade (10) rotates, the waste gas and the pretreatment liquid are fully mixed, the waste gas gradually floats upwards along the waste gas guide plate (11), and then particulate matters in the waste gas are precipitated inside the pretreatment shell (2);
the separated waste gas enters the inside of the waste gas photocatalytic oxidation decomposition equipment (1) through a first waste gas conveying pipeline (3) for decomposition and oxidation, and when the pretreated waste gas flows through a gas monitor (16), the gas monitor (16) monitors the humidity in the waste gas in real time;
s5: when the humidity of the waste gas exceeds the range of 30-65%, the controller (25) controls the first liquid level adjusting water pump (23) to be started, the pretreatment liquid in the pretreatment shell (2) is conveyed to the liquid storage tank (17), and meanwhile, the controller (25) controls the box type centrifugal fan (13) to improve the flow rate of the waste gas;
when the relative humidity of the waste gas is lower than the range of 30-65%, the gas monitor (16) transmits a signal to the controller (25), the controller (25) controls the second liquid level adjusting water pump (24) to start, the pretreatment liquid in the liquid storage tank (17) is conveyed to the interior of the pretreatment shell (2), and meanwhile, the controller (25) controls the box type centrifugal fan (13) to reduce the flow of the waste gas;
s6: when the particulate matter of gathering is depositd to preliminary treatment casing (2) inside to needs washes, to the inside injection washing liquid of liquid reserve tank (17), opens blowoff valve (28), starts washing water pump (26) through controller (25), and then washes the particulate matter of gathering to waste gas guide plate (11) surface deposit.
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