CN210584318U - VOCs exhaust-gas treatment system - Google Patents
VOCs exhaust-gas treatment system Download PDFInfo
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- CN210584318U CN210584318U CN201921233329.7U CN201921233329U CN210584318U CN 210584318 U CN210584318 U CN 210584318U CN 201921233329 U CN201921233329 U CN 201921233329U CN 210584318 U CN210584318 U CN 210584318U
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Abstract
The utility model relates to a VOCs waste gas treatment system, which comprises a pretreatment device and an adsorption device, wherein the pretreatment device is sequentially communicated with a flue along the airflow direction; the pretreatment device comprises a first shell and a first partition board arranged in the first shell, the first partition board divides an inner cavity of the first shell into at least two first filter cavities, a filter element and two first pressure monitoring devices respectively positioned at two sides of the filter element are respectively arranged in each first filter cavity, and two ends of each first filter cavity are respectively provided with a first baffle door. This VOCs exhaust-gas treatment system can guarantee preprocessing device's filter effect and avoid it to produce the influence to later stage organic matter's adsorption effect to when realizing the clean emission of VOCs waste gas, improve economic nature.
Description
Technical Field
The utility model relates to a waste gas treatment technical field, concretely relates to VOCs exhaust-gas treatment system.
Background
The Volatile Organic Compounds (VOCs) are generally organic substances which are liquid at normal temperature and have a boiling point lower than 250 ℃, and are the most common pollutants discharged in the industries of petrochemical industry, pharmacy, printing, shoe making, paint spraying and the like. The VOCs mainly comprise organic substances such as hydrogen sulfide, thiols, ammonia, amines, nitro compounds, hydrocarbons, fatty acids, alcohols, phenols, esters, organic halogen derivatives and the like, are mostly toxic, inflammable and explosive, are main pollution sources for generating ozone pollution and photochemical pollution, are classified as the largest air pollution source except fine particles by the environmental protection department, and have serious toxic and harmful effects on human health as the environment is polluted when the VOCs are discharged. Facing increasingly severe environmental problems, continuously improved environmental awareness and serious resource shortage, the treatment of the VOCs waste gas is widely concerned and urgently needed to be solved.
VOCs waste gas treatment includes: source reduction, intermediate control and end treatment. At present, the tail end treatment is mainly used in China, and VOCs tail end treatment technologies can be divided into two types, wherein one type is a destructive method, such as an incineration method and a catalytic combustion method. Another type is non-destructive methods such as adsorption, absorption, condensation, membrane separation, and the like.
At present, the adsorption method is the most mature technology in China with the highest utilization rate, and especially the activated carbon adsorption technology is the most consistent with the current national conditions in China, namely VOCs waste gas firstly passes through a pretreatment device to remove dust particles and the like in the flue gas, and then passes through an adsorption bed to adsorb organic substances to obtain clean flue gas which is directly discharged.
Need filter the dust particle in the VOCs waste gas among the preprocessing device for filter in the preprocessing device takes place to block up easily, needs the system shutdown and carries out whole change to filtering piece when the part of filtering piece takes place to block up, and the economic nature is relatively poor, if not change then the great filter effect who influences preprocessing device of resistance influence later stage organic matter's adsorption effect even.
Therefore, how to provide a VOCs exhaust-gas treatment system, the filter effect that can guarantee preprocessing device avoids its adsorption effect to later stage organic matter to when realizing the clean emission of VOCs waste gas, improve the economic nature, be the technical problem that technical staff in the field need solve.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a VOCs exhaust-gas treatment system can guarantee that preprocessing device's filter effect avoids its adsorption effect to later stage organic matter to produce the influence to when realizing the clean emission of VOCs waste gas, improve the economic nature.
In order to solve the technical problem, the utility model provides a VOCs waste gas treatment system, which comprises a pretreatment device and an adsorption device, wherein the pretreatment device is sequentially communicated with a flue along the airflow direction; the pretreatment device comprises a first shell and a first partition board arranged in the first shell, the first partition board divides an inner cavity of the first shell into at least two first filter cavities, a filter element and two first pressure monitoring devices respectively positioned on two sides of the filter element are respectively arranged in each first filter cavity, and two ends of each first filter cavity are respectively provided with a first baffle door.
In the pretreatment device, the arrangement of the first partition plate can divide the inner cavity of the first shell into at least two mutually independent first filter cavities, VOCs waste gas enters each first filter cavity from the flue respectively and is filtered by the filter element in each first filter cavity, and the gas filtered by each first filter cavity is gathered again in the flue and is introduced into the adsorption device together. That is, each first filter chamber is separately communicated with the flue and forms an independent pretreatment unit.
Wherein, the both sides (towards the one side of air current upper reaches and towards the one side of air current low reaches) of the filter piece in every first filter chamber are equipped with a first pressure monitoring devices respectively for the pressure of the filter piece both sides in each first filter chamber of real-time supervision, when the pressure differential of the both sides of a certain filter piece reaches first default, explain this filter piece takes place to block up, need in time change it, at this moment, close the first baffle door at the both ends of this first filter chamber, make no gas flow in this first filter chamber, then change the filter piece in this first filter chamber, after the change is accomplished, open again the first baffle door at the both ends of this first filter chamber can.
When a certain first filter intracavity filter piece and take place to block up, can change this filter piece alone, need not to change the filter piece in all first filter intracavity simultaneously, economic nature is good to, when changing the filter piece in a first filter intracavity, other first filter chambeies need not stop work, can guarantee this VOCs exhaust-gas treatment system incessant operation, guarantee the treatment effeciency of VOCs waste gas. Simultaneously, whether should filter the piece and take place to block up through the pressure differential judgement of filtering a piece both sides to in time change the filter piece in each first filter chamber, can guarantee this preprocessing device's filtration efficiency, and then guarantee later stage adsorption equipment to organic substance's adsorption effect, in order to realize clean emission.
The integrated a plurality of preprocessing units of this preprocessing device can improve economic nature, guarantee this VOCs exhaust-gas treatment system's treatment effeciency under the unchangeable condition of the whole volume of system, flue structure.
Optionally, the adsorption device includes a second housing and a second partition board disposed in the second housing, the second partition board separates an inner cavity of the second housing into at least two second filter chambers, each of the filter chambers is respectively provided with an activated carbon adsorption bed and two second pressure monitoring devices disposed at two sides of the activated carbon adsorption bed, and two ends of the second filter chamber are respectively provided with a second partition board door.
Optionally, the desorption device further comprises an air inlet pipeline and an air outlet pipeline which are respectively communicated with the second filter cavities in a one-to-one correspondence manner, the air inlet pipeline can introduce desorption gas into the downstream direction of the airflow of the activated carbon adsorption bed, and the air outlet pipeline can discharge the desorption gas from the upstream direction of the airflow of the activated carbon adsorption bed; and third baffle doors are respectively arranged between the air inlet pipeline and the second filter cavity and between the exhaust pipeline and the second filter cavity.
In the pretreatment device, the arrangement of the first partition plate can divide the inner cavity of the first shell into at least two mutually independent first filter cavities, VOCs waste gas enters each first filter cavity from the flue respectively and is filtered by the filter element in each first filter cavity, and the gas filtered by each first filter cavity is gathered again in the flue and is introduced into the adsorption device together. That is, each first filter chamber is separately communicated with the flue and forms an independent pretreatment unit.
Wherein, the both sides (towards the one side of air current upper reaches and towards the one side of air current low reaches) of the filter piece in every first filter chamber are equipped with a first pressure monitoring devices respectively for the pressure of the filter piece both sides in each first filter chamber of real-time supervision, when the pressure differential of the both sides of a certain filter piece reaches first default, explain this filter piece takes place to block up, need in time change it, at this moment, close the first baffle door at the both ends of this first filter chamber, make no gas flow in this first filter chamber, then change the filter piece in this first filter chamber, after the change is accomplished, open again the first baffle door at the both ends of this first filter chamber can.
When a certain first filter intracavity filter piece and take place to block up, can change this filter piece alone, need not to change the filter piece in all first filter intracavity simultaneously, economic nature is good to, when changing the filter piece in a first filter intracavity, other first filter chambeies need not stop work, can guarantee this VOCs exhaust-gas treatment system incessant operation, guarantee the treatment effeciency of VOCs waste gas.
The integrated a plurality of preprocessing units of this preprocessing device can improve economic nature, guarantee this VOCs exhaust-gas treatment system's treatment effeciency under the unchangeable condition of the whole volume of system, flue structure.
Optionally, the first casing with the second casing all includes the tube-shape casing and two locates the horn type smoke box at tube-shape casing both ends, the big footpath end of horn type smoke box with the tube-shape casing intercommunication, the path end of horn type smoke box with the flue intercommunication.
Optionally, each of the first filtering cavities and each of the second filtering cavities are respectively provided with an air distribution plate, and the air distribution plate is arranged in the horn-shaped smoke box towards the upstream side of the air flow.
Optionally, the second filter chamber is provided with the uniform air distribution plate in the horn-shaped smoke box towards the downstream side of the air flow, and the uniform air distribution plate is located between the air inlet pipeline and the activated carbon adsorption bed.
Optionally, the pressure monitoring device further comprises an alarm device, and when the pressure difference between the two first pressure monitoring devices reaches a first preset value or the pressure difference between the two second pressure monitoring devices reaches a second preset value, the alarm device can send an alarm signal.
Optionally, the filter element includes a coarse filter layer and a fine filter layer sequentially arranged along the airflow direction, and the filter pores of the coarse filter layer are larger than those of the fine filter layer.
Optionally, the coarse filter layer and the fine filter layer are arranged in a wave shape or a zigzag shape.
Optionally, the number of the adsorption devices is at least two, and each of the adsorption devices is arranged in parallel.
Drawings
Fig. 1 is a schematic structural diagram of a VOCs waste gas treatment system according to an embodiment of the present invention;
FIG. 2 is a schematic view of the pretreatment apparatus of FIG. 1;
FIG. 3 is a schematic diagram of the adsorption and desorption devices of FIG. 1;
fig. 4 is a schematic view of the internal structure of the second filter chamber in fig. 3.
In the accompanying fig. 1-4, the reference numerals are illustrated as follows:
1-flue;
2-pretreatment device, 21-first shell, 22-first partition, 23-first filter chamber, 24-filter element, 241-coarse filter layer, 242-fine filter layer, 25-first pressure monitoring device, 26-first baffle door;
3-an adsorption device, 31-a second shell, 32-a second partition, 33-a second filter chamber, 34-an activated carbon adsorption bed, 35-a second pressure monitoring device, 36-a second partition door;
4-desorption device, 41-air inlet pipeline, 42-exhaust pipeline, 43-third baffle door;
51-cylindrical shell, 52-horn smoke box;
6-evenly distributing plates.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1-4, fig. 1 is a schematic structural diagram of a VOCs waste gas treatment system according to an embodiment of the present invention; FIG. 2 is a schematic view of the pretreatment apparatus of FIG. 1; FIG. 3 is a schematic diagram of the adsorption and desorption devices of FIG. 1; fig. 4 is a schematic view of the internal structure of the second filter chamber in fig. 3.
The embodiment of the utility model provides a VOCs exhaust-gas treatment system, it includes along the air current direction in proper order with 1 intercommunication pretreatment device 2 and adsorption equipment 3 that set up in the flue, wherein, VOCs waste gas is the inside waste gas that contains VOCs (volatile organic compounds, volatile organic pollutant), VOCs mainly includes hydrogen sulfide, the thiols class, ammonia, amines, nitro compound, hydrocarbons, fatty acids, alcohols, phenols, esters and organic halogen are organic matter such as derivatives, pretreatment equipment 2 is used for carrying out the preliminary treatment to VOCs waste gas, with granule in the filtering VOCs waste gas, the dust, adsorption equipment 3 is arranged in adsorbing the organic material in the VOCs waste gas after pretreatment equipment 2 filters. Specifically, the pretreatment device 2 includes a first housing 21 and a first partition 22 disposed in the first housing 21, the first partition 22 divides an inner cavity of the first housing 21 into at least two first filter cavities 23, each first filter cavity 23 is provided with a filter element 24 and two first pressure monitoring devices 25 disposed on two sides of the filter element 24, and first baffle doors 26 are disposed between two ends of the first filter cavities 23 and the flue 1.
The direction of the solid arrows in fig. 1-4 indicates the flow direction of the VOCs exhaust gas in the stack 1, i.e., the above-described flow direction.
In detail, in the pretreatment device 2, the first partition plate 22 is arranged to divide the inner cavity of the first housing 21 into at least two independent first filter chambers 23, the VOCs waste gas enters each first filter chamber 23 from the flue 1 and is filtered by the filter element 24 in each first filter chamber 23, and the gases filtered by each first filter chamber 23 are converged again in the flue 1 and are introduced into the adsorption device 3 together. That is, each of the first filtering chambers 23 is separately communicated with the flue 1, and forms an independent pretreatment unit.
Wherein, both sides (the side facing the upstream of the air flow and the side facing the downstream of the air flow) of the filtering element 24 in each first filtering chamber 23 are respectively provided with a first pressure monitoring device 25 for monitoring the pressures of both sides of the filtering element 24 in each first filtering chamber 23 in real time, when the pressure difference between both sides of one filtering element 24 reaches a first preset value, it indicates that the filtering element 24 is blocked and needs to be replaced in time, at this time, the first baffle doors 26 at both ends of the first filtering chamber 23 are closed, so that no air flows in the first filtering chamber 23, then the filtering element 24 in the first filtering chamber 23 is replaced, and after the replacement is completed, the first baffle doors 26 at both ends of the first filtering chamber 23 are opened again.
When the filtering piece 24 in one first filtering cavity 23 is blocked, the filtering piece 24 can be independently replaced without replacing the filtering pieces 24 in all the first filtering cavities 23 simultaneously, the economical efficiency is good, and when the filtering piece 24 in one first filtering cavity 23 is replaced, other first filtering cavities 23 do not need to stop working, the uninterrupted operation of the VOCs waste gas treatment system can be ensured, and the treatment efficiency of VOCs waste gas is ensured. Simultaneously, judge whether should filter the piece and take place to block up through the pressure differential of filtering 24 both sides to filter 24 in each first filter chamber 23 in time and change, can guarantee this preprocessing device 2's filtration efficiency, and then guarantee the adsorption efficiency of later stage adsorption equipment 3 to organic matter, in order to realize clean emission.
A plurality of integrated pretreatment unit of this preprocessing device 2 can improve economic nature, guarantee this VOCs exhaust-gas treatment system's treatment effeciency under the unchangeable condition of the whole volume of system, flue 1 structure.
In the above embodiment, the adsorption device 3 includes the second casing 31 and the second partition plate 32 disposed in the second casing 31, the second partition plate 32 divides the inner cavity of the second casing 31 into at least two second filter chambers 33, the activated carbon adsorption bed 34 and two second pressure monitoring devices 35 disposed on two sides of the activated carbon adsorption bed 34 are respectively disposed in each second filter chamber 33, and the two ends of the second filter chamber 33 are respectively provided with the second partition plate doors 36. That is, the structure of the inside of the adsorption apparatus 3 in the present embodiment is similar to the structure of the inside of the pretreatment apparatus 2, and the second filter chambers 33 are independent of each other and individually communicate with the flue 1.
The two second pressure monitoring devices 35 are respectively used for monitoring the pressures at two sides of the activated carbon adsorption bed 34, when the pressure difference between two sides of the activated carbon adsorption bed 34 in one second filter chamber 33 reaches a second preset value, it is described that the activated carbon adsorption bed 34 in the second filter chamber 33 is blocked, and it needs to be processed, at this time, the second baffle doors 36 at two ends of the second filter chamber 33 are closed, so that no gas flows in the second filter chamber 33, then the activated carbon adsorption bed 34 in the second filter chamber 33 is processed, and after the processing is completed, the second baffle doors 36 at two ends of the second filter chamber 33 are opened again.
In this embodiment, the activated carbon adsorption bed 34 in each second filter chamber 33 is similar to the filter member 24 in the first filter chamber 23, and can be treated independently, so that the economy is further improved, and the influence on the filtration of other second filter chambers 33 is avoided, i.e., when the activated carbon adsorption bed 34 in a certain second filter chamber 33 is treated, the system does not need to stop running, the uninterrupted operation of the VOCs waste gas treatment system is ensured, and the treatment efficiency is ensured.
In this embodiment, no requirement is made on the specific setting positions of the pressure monitoring devices (including the first pressure monitoring device 25 and the second pressure monitoring device 35), as shown in fig. 2, two pressure monitoring devices may be disposed at both ends of the filter cavity (the first filter cavity 23 or the second filter cavity 33), or as shown in fig. 3, two pressure monitoring devices may be disposed in the middle of the filter cavity, as long as it is ensured that the two pressure monitoring devices can monitor the flue gas pressures at both sides of the filter element 24/the activated carbon adsorption bed 34, respectively. Meanwhile, specific numerical values of the first preset value and the second preset value are not required, and can be set according to specific conditions.
In the above embodiment, the VOCs exhaust gas treatment system further includes a desorption device 4, the desorption device 4 includes an air inlet pipeline 41 and an exhaust pipeline 42 which are respectively communicated with the second filter cavities 33 in a one-to-one correspondence manner, the air inlet pipeline 41 can introduce desorption gas (such as clean gas like water vapor) into the downstream direction of the air flow of the activated carbon adsorption bed 34, and the exhaust pipeline 42 can discharge the desorption gas from the upstream direction of the air flow of the activated carbon adsorption bed 34; third baffle doors 43 are respectively arranged between the air inlet pipeline 41 and the second filter cavity 33 and between the exhaust pipeline 42 and the second filter cavity 33.
In detail, each second filter cavity 33 is correspondingly provided with an air inlet pipeline 41 and an exhaust pipeline 42, under normal conditions, the third baffle door 43 is closed, the second baffle door 36 is opened, the activated carbon adsorption bed 34 in the second filter cavity 33 is used for adsorbing the gas to be adsorbed (the gas filtered by the pretreatment device 1), when the activated carbon adsorption bed 34 in the second filter cavity 33 is blocked and the activated carbon adsorption bed 34 needs to be treated, the second baffle doors 36 at two ends of the second filter cavity 33 are closed and the third baffle door 43 is opened, the desorbed gas is introduced into the second filter cavity 33 through the air inlet pipeline 41, as shown by the direction of the dotted line arrow in fig. 3, the direction of the desorbed gas is the flow direction of the desorbed gas, which is opposite to the flow direction of the gas to be adsorbed, so as to blow off the organic substances adsorbed on the surface of the activated carbon adsorption bed 34 from the opposite direction and discharge the desorbed gas out of the second filter cavity 33 along the exhaust pipeline 42, the later desorption device 4 can retrieve the organic substance that is mingled with in the desorption gas to realize the purpose of resource recycle.
The desorption device 4 in this embodiment can desorb the activated carbon adsorption beds 34 in the second filter cavities 33 separately, and the system does not need to stop running, thereby ensuring the treatment efficiency. Of course, in this embodiment, the treatment on the activated carbon adsorption bed 34 may also be replaced, that is, when a certain activated carbon adsorption bed 34 is blocked, it is only necessary to directly replace the activated carbon adsorption bed 34, and the desorption device 4 is configured to switch between adsorption and desorption through the two second baffle doors 36 and the two third baffle doors 43, so that the structure is simple, the activated carbon adsorption bed 34 can be prevented from being replaced, the operation is simplified, and the activated carbon adsorption bed 34 can be recycled and has good economical efficiency, and meanwhile, organic substances adsorbed by the activated carbon adsorption bed 34 can be recovered, thereby realizing resource recycling.
In the above embodiment, as shown in fig. 2 and fig. 3, the first housing 21 and the second housing 31 have similar structures, and each of the first housing 21 and the second housing 31 includes a cylindrical housing 51 and two trumpet-shaped smoke boxes 52, and the two trumpet-shaped smoke boxes 52 are respectively disposed at two ends of the cylindrical housing 51, wherein the radial cross section of the cylindrical housing 51 may be square or circular, and the like, without specific limitation, the small diameter end of the trumpet-shaped smoke box 52 is communicated with the flue 1, and the large diameter end is communicated with the cylindrical housing 51, that is, both ends of the first housing 21 and both ends of the second housing 31 are tapered structures, so that when the VOCs exhaust gas enters the first housing 21 or the second housing 31 along the flue 1 for filtering, the cross-sectional area can be increased, the filtering areas of the pretreatment device 2 and the adsorption device 3 are increased, the resistance is reduced, and the filtering and adsorption effects are improved.
Furthermore, each first filter chamber 23 and each second filter chamber 33 are respectively provided with an air distribution plate 6, and the air distribution plate 6 is arranged in the trumpet-shaped smoke box 52 facing to the upstream side of the air flow. Wherein, the air current equipartition board 6 is the perforated plate that evenly is equipped with a plurality of holes, and the setting up of air current equipartition board 6 makes gas back in getting into horn type smoke box 52, avoids the cross-sectional area grow suddenly, leads to the unstable condition of air current in the filter chamber for the flue gas is stable when reaching to filter 24 or active carbon adsorption bed 34, and the inside smooth distribution uniformity of system is good, with the reduction to filtering 24 or active carbon adsorption bed 34's impact, prolongs its life.
In the above embodiment, the uniformly distributing plate 6 is also disposed in the trumpet-shaped smoke box 52 facing the downstream side of the airflow in the second filter cavity 33, that is, the uniformly distributing plate 6 is disposed in the trumpet-shaped smoke box 52 at both ends in the second filter cavity 33, wherein the uniformly distributing plate 6 at the upstream side of the airflow is used for stabilizing the gas to be adsorbed entering the second filter cavity 33, and the uniformly distributing plate 6 at the downstream side of the airflow is located between the air inlet pipeline 41 and the activated carbon adsorption bed 34 and is used for uniformly distributing the desorbed gas entering the second filter cavity 33, so that the desorbed gas can uniformly desorb the activated carbon adsorption bed 34, the impact of the desorbed gas on the activated carbon adsorption bed 34 can be avoided while the cleaning effect is achieved, and the service life of the desorbed gas is prolonged.
Specifically, the arrangement of the uniform distribution plate 6 may be one layer as shown in fig. 2, two layers as shown in fig. 3 and 4, or more layers, which is not limited herein, and may be specifically arranged according to the length of the trumpet-shaped smoke box 52.
In the above embodiment, the VOCs exhaust treatment system further includes an alarm device (not shown), which sends an alarm signal when the pressure difference between the two first pressure monitoring devices 25 reaches a first preset value or the pressure difference between the two second pressure monitoring devices 35 reaches a second preset value. Alternatively, in this embodiment, the pressure difference between the two pressure monitoring devices (the two first pressure monitoring devices 25 and the two second pressure monitoring devices 35) may be directly displayed through a display screen or the like, and an operator may take measures by monitoring the change of the pressure difference and if the change exceeds a preset value (the first preset value or the second preset value). And alarm device's setting can in time point out operating personnel, avoids because reasons such as operating personnel negligence lead to influencing the filter effect of system.
Specifically, the alarm signal may be at least one of a sound signal, a photoelectric signal, or a remote alarm message, and is not limited herein. How to send out an alarm signal when the pressure difference reaches a preset value is well known in the prior art, and for the sake of brevity, no further description is given here.
In the above embodiment, the filtering element 24 includes the coarse filtering layer 241 and the fine filtering layer 242 sequentially arranged along the airflow direction, that is, the filtering element 24 filters the VOCs waste gas through two layers, i.e., the coarse filtering layer 241 and the fine filtering layer 242, wherein the filtering holes of the coarse filtering layer 241 are larger than the filtering holes of the fine filtering layer 242, the coarse filtering layer 241 filters larger particles in the VOCs waste gas, and the fine filtering layer 242 filters smaller particles, so as to ensure that the particles in the VOCs waste gas are more sufficiently filtered, and prevent the particles from entering the adsorption device 3 to damage the activated carbon adsorption bed 34 and affect the adsorption effect and the service life thereof.
Compare in the scheme of the granule in filtering VOCs waste gas through the one deck, the setting of two-layer filter layer of coarse filtration layer 241 and fine filtration layer 242 can reduce the gas resistance in the first filter chamber 23, promotes the filter effect, simultaneously, can guarantee this and filter 24's life when guaranteeing fully to carry out filterable to the granule in the VOCs waste gas.
Further, the coarse filter layer 241 and the fine filter layer 242 are any one of a sponge and a cloth bag. Specifically, the coarse filtering layer 241 and the fine filtering layer 242 may be selected from sponges with different specifications, or may be selected from cloth bags with different specifications, or one of the sponges may be sponge and the other cloth bag may be cloth bag, which is not limited herein. Alternatively, in this embodiment, one of the coarse filtering layer 241 and the fine filtering layer 242 may be selected as other filtering materials such as a filter net, and the sponge and the cloth bag have better filtering effect, good stability and long service life compared with other filtering materials.
In the above embodiment, the coarse filtering layer 241 and the fine filtering layer 242 are both arranged in a wave shape or a zigzag shape, so that the filtering area of the filtering member 24 is large, and the filtering efficiency is improved.
In the above embodiment, the number of the adsorption devices 3 is at least two, and each adsorption device 3 is arranged in parallel, that is, the gas filtered by one pretreatment device 2 is respectively introduced into at least two adsorption devices 3 along the flue 1, and at least two second filter cavities 33 are arranged in each adsorption device 3 to adsorb organic matters in the gas to be adsorbed. Of course, in this embodiment, there is no requirement for the specific number of the adsorption devices 3, such as two, three or more, or one adsorption device may be provided, and the arrangement of at least two adsorption devices 3 can reduce the gas pressure in each adsorption device 3, thereby ensuring the filtering effect.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A VOCs waste gas treatment system is characterized by comprising a pretreatment device (2) and an adsorption device (3), wherein the pretreatment device (2) and the adsorption device are sequentially communicated with a flue (1) along the airflow direction;
the pretreatment device (2) comprises a first shell (21) and a first partition plate (22) arranged in the first shell (21), the first partition plate (22) divides an inner cavity of the first shell (21) into at least two first filter cavities (23), a filter element (24) and two first pressure monitoring devices (25) which are respectively positioned at two sides of the filter element (24) are respectively arranged in each first filter cavity (23), and two ends of each first filter cavity (23) are respectively provided with a first baffle door (26).
2. A VOCs waste gas treatment system as claimed in claim 1, wherein the adsorption device (3) comprises a second housing (31) and a second partition plate (32) disposed inside the second housing (31), the second partition plate (32) divides the inner cavity of the second housing (31) into at least two second filter chambers (33), each filter chamber is provided therein with an activated carbon adsorption bed (34) and two second pressure monitoring devices (35) disposed at two sides of the activated carbon adsorption bed (34), and two ends of the second filter chamber (33) are respectively provided with a second partition plate door (36).
3. A VOCs exhaust treatment system as claimed in claim 2, further comprising a desorption device (4), wherein the desorption device (4) comprises an inlet pipeline (41) and an outlet pipeline (42) which are respectively communicated with the second filter chambers (33) in a one-to-one correspondence manner, the inlet pipeline (41) can introduce desorption gas into the downstream direction of the activated carbon adsorption bed (34), and the outlet pipeline (42) can discharge the desorption gas from the upstream direction of the activated carbon adsorption bed (34);
and third baffle doors (43) are respectively arranged between the air inlet pipeline (41) and the second filtering cavity (33) and between the exhaust pipeline (42) and the second filtering cavity (33).
4. A VOCs exhaust treatment system as claimed in claim 3, wherein each of the first housing (21) and the second housing (31) comprises a cylindrical housing (51) and two trumpet-shaped smoke boxes (52) provided at both ends of the cylindrical housing (51), the large diameter end of the trumpet-shaped smoke box (52) communicates with the cylindrical housing (51), and the small diameter end of the trumpet-shaped smoke box (52) communicates with the smoke duct (1).
5. A VOCs waste gas treatment system according to claim 4, wherein each of the first filter chambers (23) and each of the second filter chambers (33) are provided with an air distribution plate (6), and the air distribution plate (6) is provided in the trumpet-shaped smoke box (52) facing the upstream side of the air flow.
6. A VOCs waste gas treatment system according to claim 5, wherein the trumpet-shaped smoke box (52) in the second filter chamber (33) towards the downstream side of the airflow is provided with the flow distribution plate (6), and the flow distribution plate (6) is positioned between the air inlet pipeline (41) and the activated carbon adsorption bed (34).
7. A VOCs exhaust treatment system according to any of claims 2-6 further comprising an alarm device capable of signaling an alarm when the pressure differential between two of the first pressure monitoring devices (25) reaches a first predetermined value or the pressure differential between two of the second pressure monitoring devices (35) reaches a second predetermined value.
8. A VOCs exhaust treatment system according to any of claims 1-6, wherein the filter element (24) comprises a coarse filter layer (241) and a fine filter layer (242) arranged in series along the airflow direction, the coarse filter layer (241) having larger filter openings than the fine filter layer (242).
9. A VOCs effluent treatment system as claimed in claim 8 wherein the coarse filter layer (241) and the fine filter layer (242) are both in a wave or zigzag arrangement.
10. A waste gas treatment system for VOCs according to any of claims 1-6, characterized in that the number of adsorption devices (3) is at least two and that each adsorption device (3) is arranged in parallel.
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| CN201921233329.7U CN210584318U (en) | 2019-07-31 | 2019-07-31 | VOCs exhaust-gas treatment system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113457366A (en) * | 2021-05-21 | 2021-10-01 | 苏州天迎蓝智能环保科技有限公司 | Waste gas treatment equipment |
| CN117101300A (en) * | 2023-08-25 | 2023-11-24 | 深圳市睿维盛环保科技有限公司 | VOCs exhaust treatment system |
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2019
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113457366A (en) * | 2021-05-21 | 2021-10-01 | 苏州天迎蓝智能环保科技有限公司 | Waste gas treatment equipment |
| CN117101300A (en) * | 2023-08-25 | 2023-11-24 | 深圳市睿维盛环保科技有限公司 | VOCs exhaust treatment system |
| CN117101300B (en) * | 2023-08-25 | 2024-05-24 | 深圳市睿维盛环保科技有限公司 | VOCs exhaust treatment system |
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