CN110841401B - Exhaust gas treatment equipment - Google Patents
Exhaust gas treatment equipment Download PDFInfo
- Publication number
- CN110841401B CN110841401B CN201810946433.4A CN201810946433A CN110841401B CN 110841401 B CN110841401 B CN 110841401B CN 201810946433 A CN201810946433 A CN 201810946433A CN 110841401 B CN110841401 B CN 110841401B
- Authority
- CN
- China
- Prior art keywords
- filter screen
- water spraying
- exhaust gas
- air inlet
- shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- B01D50/60—Combinations of devices covered by groups B01D46/00 and B01D47/00
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Of Particles Using Liquids (AREA)
- Treating Waste Gases (AREA)
Abstract
The present disclosure provides an exhaust gas treatment apparatus, which includes a body, a filter screen, and a water spraying device. The body comprises a shell, and an air inlet and an air outlet which are respectively arranged at two opposite ends of the shell. The filter screen is arranged in the shell. The average thickness of the filter screen is 0.4 cm to 1.0 cm. The water spraying devices are arranged between the air inlet and the filter screen, wherein at least one water spraying device sprays water towards the filter screen so as to form a water film on the surface of the filter screen. The water film can effectively increase the removal efficiency of smaller particles and salt particles in the waste gas, and can greatly reduce the frequency of equipment maintenance.
Description
Technical Field
The present disclosure relates to an exhaust gas treatment device, and more particularly, to a wet exhaust gas treatment device.
Background
In industrial processes, large amounts of waste gases are inevitably produced at all times. If a large amount of exhaust gas is directly discharged into the atmosphere without any purification treatment, it will cause extensive effects on the ecosystem and the human environment. Therefore, it is necessary to actively develop an exhaust gas treatment apparatus to effectively remove harmful substances and particles from exhaust gas.
A conventional wet scrubber (also called scrubber) is a common waste gas treatment equipment, which uses liquid to remove particles or harmful gases. The greatest advantage of wet scrubbers is the simultaneous removal of both particulate and gaseous pollutants. Although wet scrubbers can have high dust removal efficiency, wet scrubbers often have problems of large pressure drop, high operation cost and wastewater treatment. Wet scrubbers are more widely used in waste gas treatment facilities for removing acid and alkali gases.
The dust removal principle of the conventional wet scrubber is to collect dust particles by contacting the dust particles with water droplets having a particle size of 50 μm to 500 μm, and then separate the water droplets containing the particles from the exhaust gas by gravity, inertia or centrifugal force, thereby achieving the purpose of removing dust. In general, wet scrubbers contact particles with water droplets through three mechanisms, namely, inertial impaction, direct entrapment, and brownian motion. Inertial impaction is an important collection mechanism for particles with an average particle size greater than 10 microns; the direct interception is used for complementing the particles with larger average particle size; the fine particles having a smaller average particle diameter may come into contact with the water droplets due to brownian motion and be collected. In the above mechanism, direct trapping can be easily achieved by a general dust remover, and for small particles which are difficult to remove, the small particles must be complemented by the mechanisms of inertial impact and brownian motion. However, the conventional wet scrubber has a poor effect of removing particles (PM2.5) having an average particle size of 2.5 μm or less.
A conventional wet scrubber for processing inorganic acid-base-containing gas is a scrubber tower, which absorbs and transports solutes in the gas into the liquid by gas-liquid two-phase contact. The conventional absorption scrubber includes a spray column (spray column), a plate absorption tower (plate absorber) and a packed tower (packed tower), among which the packed tower is most widely used. The conventional packed tower is a continuous operation equipment, and the washing liquid is usually recycled, and the problem of nozzle blockage and pipe diameter reduction caused by the accumulation of granular matters in long-term operation is that the maintenance of the packed tower is frequently performed to maintain the working efficiency.
In view of the foregoing, it is desirable to provide an exhaust gas treatment apparatus that can effectively remove particles with smaller average particle size and reduce the frequency of equipment maintenance.
Disclosure of Invention
One aspect of the present disclosure provides an exhaust gas treatment apparatus, which includes a body, a filter screen, and a water spraying device. The body comprises a shell, and an air inlet and an air outlet which are respectively arranged at two opposite ends of the shell. The inlet is tapered and the outlet is tapered in a direction from the inlet to the outlet. The filter screen is arranged in the shell. The average thickness of the filter screen is 0.4 cm to 1.0 cm. The water spraying device is arranged in the shell and is arranged between the air inlet and the filter screen. At least one water spraying device sprays water towards the filter screen.
Another aspect of the present disclosure is to provide an exhaust gas treatment device, which includes a body, a filter screen, a filling layer, a defogging layer, and a water spraying device. The body comprises a shell, and an air inlet and an air outlet which are arranged at two opposite ends of the shell. The inlet is tapered and the outlet is tapered in a direction from the inlet to the outlet. The filter screen is arranged in the shell. The average thickness of the filter screen is 0.4 cm to 1.0 cm. The filling layer is arranged between the air inlet and the filter screen. The defogging layer is arranged in the shell. The water spraying device is arranged on one side wall of the shell and is arranged between the air inlet and the filter screen. The water spray means sprays the liquid toward the packed bed.
Drawings
The aspects of the present disclosure are best understood from the following detailed description when read with the accompanying drawings. It is noted that, as is standard practice in the industry, many features are not drawn to scale. In fact, the dimensions of many of the features may be arbitrarily scaled for clarity of discussion.
FIG. 1 is a schematic cross-sectional view illustrating an exhaust gas treatment apparatus according to an embodiment of the present disclosure;
FIG. 2 is a schematic cross-sectional view illustrating an exhaust gas treatment apparatus according to another embodiment of the present disclosure;
FIG. 3 is a schematic cross-sectional view illustrating an exhaust gas treatment apparatus according to an embodiment of the present disclosure.
Detailed Description
The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. Specific examples of components and arrangements are described below to simplify the present disclosure. These are, of course, merely examples and are not intended to be limiting. For example, the description that a first feature is formed over or on a second feature encompasses embodiments in which the first and second features are in direct contact, as well as embodiments in which other features are formed between the first and second features such that the first and second features are not in direct contact. The dimensions of many of the features may be drawn on different scales to simplify and clarify the same. In addition, the present disclosure may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.
Spatially relative terms, such as "below," "… below," "lower," "upper," "higher," and the like, are used for ease of describing the relationship of elements or features to one another as illustrated in the figures. Spatially relative terms may encompass different orientations of the element in use or operation in addition to the orientation depicted in the figures. The device may be oriented in other ways (rotated 90 degrees or in other directions). The order of the following operations may vary. One or more additional operations may be performed between or after the following operations, and one or more of the following operations may be removable.
The present disclosure provides an exhaust gas treatment apparatus, wherein a filter screen is disposed in a housing, and a water spraying device sprays water toward the filter screen to form a water film on the surface of the filter screen. The water film is used to reduce the pores on the surface of the filter screen, so as to increase the adsorption efficiency of the filter screen on the fine particles in the waste gas, especially the better trapping efficiency on salts. In addition, because the particles in the waste gas are blocked by the water film, and the liquid adsorbing the particles continuously flows due to gravity sedimentation, the filter screen cannot be blocked. Therefore, the present disclosure increases the removal efficiency of smaller particles and salt particles in the exhaust gas through the filter screen with the water film, and can greatly reduce the frequency of equipment maintenance.
Referring to fig. 1, a schematic cross-sectional view of an exhaust treatment apparatus 100 according to an embodiment of the disclosure is shown. The exhaust treatment device 100 is horizontally disposed. The exhaust gas treatment apparatus 100 includes a body 110, a filter 120, and a water spray device 130. The body includes a housing 112, an inlet port 114, and an outlet port 116. An inlet port 114 and an outlet port 116 are provided at opposite ends of the housing 112, respectively. Along the direction from the inlet 114 to the outlet 116, the inlet 114 is gradually opened, and the outlet 116 is gradually reduced, i.e. the pipe diameter of the housing 112 is larger than that of the inlet 114 and the outlet 116, and the extreme ends of the inlet 114 and the outlet 116 are the minimum pipe diameter. The filter screen 120 and the water spraying device 130 are disposed in the housing 112, wherein the water spraying device 130 is closer to the air inlet 114 than the filter screen 120. It should be added that the filter screen 120 may not be disposed in the exhaust port 116, and the arrangement of the filter screen 120 may cause the pressure difference between the air inlet and the exhaust port to rise greatly due to the small pipe diameter of the exhaust port 116, thereby affecting the performance of the air draft equipment connected to the rear end.
Part of the water spraying means 130a sprays water in a direction 132 toward the filter 120 so that a water film is formed on the surface of the filter. In some embodiments, a portion of the water spray device 130b may be selectively positioned to spray the liquid in a direction 134 opposite to the direction of the water spray device 130a, which is primarily used to contact the particulates in the exhaust gas with the water droplets to be more easily trapped. In some embodiments, the liquid sprayed by the water spray device 130 may comprise one of water, an acidic aqueous solution, a basic aqueous solution, or any combination thereof. The liquid for the water spray 130 is selected based on the characteristics of the treated exhaust gas.
In some embodiments, the filter screen 120 is a nonwoven fabric-containing screen. For example, the material of the non-woven fabric filter screen may be cotton, wool, hemp, silk, polyester (polyester), nylon, acryl, rayon (rayon), orlon (orlon), kaemion (cashmion), acryl (acryl), toralon (toraylon), exlan, nylon (dynel), furila (veral), polypropylene (polypropylene), etc. Generally, a filter with a larger average pore size cannot trap smaller particles, however, if a filter with a smaller average pore size is used, the pressure difference during the operation of the exhaust gas treatment device 100 is larger, and the energy consumption of the air extraction device connected to the rear end of the exhaust gas treatment device 100 is larger. In some embodiments, the filter screen 120 is a non-woven primary and/or secondary screen with a larger average pore size and an average thickness of 0.4 cm to 1.0 cm. In one embodiment, the filter screen 120 is 3M grit-free cloth of snake melon. When a water film is formed on the surface of the filter screen 120, the surface of the filter screen 120 may have smaller pores to trap smaller particles. Furthermore, in some embodiments, the waste gas includes salts generated in the manufacturing process, and the characteristics of the filter 120 with a water film and the salts being easily soluble in water can be utilized to make the salt particles absorbed or trapped by the water film, thereby preventing the chimney from discharging a large amount of white smoke and reducing the light-proof rate.
In some embodiments, the exhaust treatment device 100 may optionally include a filler layer (not shown) within the housing 112. The packing layer may be disposed, for example, between the gas inlet 114 and the water spray device 130 (or the water spray device 130 b). In one embodiment, the packing layer comprises a plurality of raschig rings (raschig rings). In one embodiment, the raschig rings of the fill layer can be filled, for example, in a random stack. Because the raschig rings have high surface area, the filling of the multi-layer raschig rings is helpful for intercepting particles and water vapor in the waste gas. The filling layer is mainly used for intercepting medium-sized particles, and the medium-sized particles in the exhaust gas are trapped by the filling layer mainly due to the inertia effect. The packing layer can further increase the particle-trapping area of the raschig rings by the liquid sprayed from the water spray device 130 b. However, smaller particles (e.g., 1 micron to 2.5 microns) tend to flash through the packed layer and not be trapped due to less inertial effects.
In other embodiments, a defogging layer (not shown) may be optionally disposed in the housing 112. The defogging layer may be disposed between the air inlet 114 and the filter screen 120, or between the filter screen 120 and the air outlet 116. The demisting layer comprises a plurality of raschig rings and/or corrugated plates, and generally speaking, the raschig rings of the demisting layer are smaller than those of the filling layer. If the demister is disposed between the filter screen 120 and the air inlet 114, the demister can trap larger particles; if the demister is disposed between the filter screen 120 and the exhaust port 116, it is mainly used to filter the liquid in the exhaust gas.
In some embodiments, a drainage unit (not shown) may be optionally disposed below the body 110 and communicated with the housing 112. The liquid is discharged from the exhaust gas treatment device 100 through the water discharge unit. The discharged liquid may be recycled through the water quality and returned to the water spray 130, or used for other applications.
In some embodiments, the exhaust treatment apparatus 100 may be disposed between the back end of all processes and the stack to remove particles and salts from the exhaust before the exhaust is exhausted through the stack. In other embodiments, the exhaust gas treatment apparatus 100 may be disposed at the rear end of each process to reduce the frequency of cleaning the air pipes.
Referring to FIG. 2, a schematic cross-sectional view of an exhaust treatment apparatus 200 according to another embodiment of the present disclosure is shown. The exhaust treatment device 200 has a similar configuration to the exhaust treatment device 100, except that the exhaust treatment device 200 is vertically disposed. The horizontal type exhaust gas treatment apparatus 100 or the vertical type exhaust gas treatment apparatus 200 may be selected according to the requirement or the spatial configuration.
The exhaust gas treatment apparatus 200 includes a body 210, a filter 220, and a water spray device 230. The body 210 includes a housing 212, an inlet port 214 and an outlet port 216 at opposite ends of the housing 212, respectively. Exhaust gas is blown upward from below through the inlet 214 to the outlet 216. The inlet 214 is tapered from bottom to top, and the outlet 216 is tapered from bottom to top. The partial water spraying device 230a sprays water toward the filter screen 220 in a direction 232 so that a water film is formed on the surface of the filter screen 220. In some embodiments, a portion of the water spray 230b may also be selectively arranged to spray the liquid in the direction 234. It is supplementary to explain, filter screen 220 can not set up in gas vent 216, because gas vent 216 pipe diameter is less, then the setting of filter screen 220 probably leads to the pressure differential between air inlet and the gas vent to rise by a wide margin, and then influences the efficiency of the exhaust equipment of rear end connection.
In some embodiments, filter screen 220 comprises a nonwoven screen. For example, the material of the non-woven fabric filter screen may be cotton, wool, hemp, silk, polyester (polyester), nylon, acryl, rayon (rayon), orlon (orlon), cassmilon (cassmilon), acryl (acryl), terra (toraylon), icoron (elan), nylon (dynel), furel (veral), polypropylene (polypropylene), etc. Generally, a filter with a larger average pore size cannot trap smaller particles, however, if a filter with a smaller average pore size is used, the pressure difference during the operation of the exhaust gas treatment device 200 is larger, and the energy consumption of the air extraction device connected to the upper end of the exhaust gas treatment device 200 is larger. In some embodiments, the filter screen 220 is a non-woven primary and/or secondary screen with a larger average pore size and an average thickness of 0.4 cm to 1.0 cm. In one embodiment, the filter screen 220 is 3M grit-free cloth of snake melon. When a water film is formed on the surface of the filter screen 220, the surface of the filter screen 220 has smaller pores to trap smaller particles. Furthermore, in some embodiments, the filter screen 220 with the water film can absorb and remove the salt particles, thereby preventing the chimney from discharging a large amount of white smoke, and reducing the light-proof rate.
In some embodiments, the exhaust treatment device 200 may optionally include a filler layer (not shown) within the housing 212. The filling layer may be disposed, for example, below the water spray device 230 (or the water spray device 230 b). In one embodiment, the packing layer comprises a plurality of raschig rings. In one embodiment, the raschig rings of the fill layer can be filled using, for example, random stacking. Because the raschig rings have high surface area, the multi-layer raschig rings are filled, and the particulate and the steam in the waste gas can be intercepted. The filling layer is mainly used for intercepting medium-sized particles, and the medium-sized particles in the exhaust gas are trapped by the filling layer mainly due to the inertia effect. The packing layer can further increase the particle-trapping area of the raschig rings by the liquid sprayed from the water spray 230 b. However, smaller particles (e.g., 1 micron to 2.5 microns) tend to flash through the packed layer and not be trapped due to less inertial effects.
In other embodiments, a defogging layer (not shown) may be optionally disposed in the housing 212. The defogging layer may be disposed above the filter screen 220 or below the filter screen 220. The demisting layer comprises a plurality of raschig rings and/or corrugated plates, and generally speaking, the raschig rings of the demisting layer are smaller than those of the filling layer. If the defogging layer is arranged below the filter screen 220, the defogging layer can capture larger particles; if the mist removing layer is disposed above the filter screen 220, it is mainly used to filter the liquid in the exhaust gas.
In some embodiments, the exhaust treatment device 200 may also optionally include a drainage unit at the lower end of the air inlet 214 to drain the liquid flowing down. The discharged liquid may be recycled through the water quality and returned to the water spray 230, or used for other applications.
In some embodiments, the exhaust treatment apparatus 200 may be disposed between the back end of all processes and the stack to remove particles and salts from the exhaust generated by the processes before the exhaust is discharged through the stack. In other embodiments, the exhaust gas treatment apparatus 200 may be disposed at the rear end of each process to reduce the frequency of cleaning the air pipes.
Referring to FIG. 3, a schematic cross-sectional view of an exhaust treatment apparatus 300 according to an embodiment of the disclosure is shown. In some embodiments, the exhaust treatment device 300 is horizontally disposed. The exhaust gas treatment apparatus 300 includes a body 310, a filter 320, a water spraying device 330, a filling layer 340, and a defogging layer 350. The body 310 includes a housing 312, and an inlet 314 and an outlet 316 at opposite ends of the housing 312. Along the direction from inlet 314 to outlet 316, inlet 314 is flared and outlet 316 is tapered. The filter screen 320, the water spraying device 330, the filling layer 340 and the defogging layer 350 are disposed in the housing 312. In some embodiments, a first filling layer 340a and a second filling layer 340b are disposed on two sides of the first defogging layer 350a, wherein the second filling layer 340b is disposed between the first defogging layer 350a and the second defogging layer 350 b. In some embodiments, filter 320 comprises a first filter 320a and/or a second filter 320b, wherein first filter 320a is disposed between first packed bed 340a and first defogging layer 350a, and second filter 320b is disposed between second packed bed 340b and second defogging layer 350 b. However, the filter screen 320 may be selectively disposed at any position of the housing 310, and the disclosure is not limited thereto.
In some embodiments, the packed layer 340 and the defogging layer 350 comprise raschig rings, wherein the defogging layer 350 may further comprise corrugated plates. Since the exhaust gas may contain acidic and alkaline particles or gases and the exhaust gas may have a high temperature, the raschig ring should be made of a material that is resistant to acid, alkali and high temperature. Both the filling layer 340 and the defogging layer 350 may comprise raschig rings having any shape, such as plum blossom type, double star type, sea urchin type, double cross type, crown type, and any combination thereof, and may be filled by, for example, random stacking. In one example, the packing layer 340 has a stacking density that is less than the stacking density of the defogging layer 350 to intercept different sizes of particles.
In some embodiments, the filter screen 320 is a nonwoven screen. For example, the material of the non-woven fabric filter screen may be cotton, wool, hemp, silk, polyester (polyester), nylon, acryl, rayon (rayon), orlon (orlon), kaemion (cashmion), acryl (acryl), toralon (toraylon), exlan, nylon (dynel), furila (veral), polypropylene (polypropylene), etc. Generally, a filter with a larger average pore size cannot trap smaller particles, however, if a filter with a smaller average pore size is used, the pressure difference during the operation of the exhaust gas treatment device 300 is larger, and the energy consumption of the air extraction device connected to the upper end of the exhaust gas treatment device 300 is larger. In some embodiments, the filter screen 320 is a non-woven primary and/or secondary screen with a larger average pore size and an average thickness of 0.4 cm to 1.0 cm. In one embodiment, the filter screen 320 is 3M grit-free cloth of snake melon. When a water film is formed on the surface of the filter screen 320, the surface of the filter screen 320 has smaller pores to trap smaller particles. Furthermore, in some embodiments, the filter 320 with a water film can absorb and remove the salt particles, thereby preventing the chimney from discharging a large amount of white smoke and reducing the light-blocking rate.
The water spraying device 330 is disposed on the sidewall of the housing 312. In some embodiments, the first water spraying device 330a is disposed above the first filling layer 340a to spray the first filling layer 340a with liquid; the second water spraying device 330b is disposed above the second packed layer 340b to spray the liquid onto the second packed layer 340 b. In some embodiments, a third water spraying device 330c may be selectively disposed above the second filter 320b to spray the liquid onto the second filter 320b to form a water film on the surface of the second filter 320 b. It should be noted that, even if the third water spraying device 330c is not disposed above the second filter 320b, the liquid sprayed by the second water spraying device 320b is adsorbed onto the second filter 320b along with the direction of the air flow, and a water film is formed on the second filter 320 b. In some embodiments, the liquid sprayed by the water spray 330 comprises water, an acidic solution, a basic solution, and any combination thereof.
In some embodiments, the exhaust gas treatment apparatus 300 may be disposed between the back end of all processes and the stack, so that the exhaust gas generated by the processes is subjected to the removal of particles and salt-like particles before being discharged through the stack. In other embodiments, the exhaust gas treatment apparatus 300 may be disposed at the rear end of each process to reduce the frequency of cleaning the air duct.
In some embodiments, the exhaust treatment device 300 may perform two-stage exhaust treatment, such as treating alkaline exhaust gas before treating acidic exhaust gas. The acidic solution is sprayed through the first water spray device 330a to wash and trap the alkaline gas and particles with the first packed layer 340 a. Then, an alkaline solution is sprayed through the second water spraying device 330b to wash and trap the acid gas and the fine particles by the second packed layer 340 b. Then, the salt particles generated by acid-base neutralization can be dissolved in the water sprayed by the third water spraying device 330c or captured by the water film on the surface of the filter screen 320, thereby preventing the chimney from discharging a large amount of white smoke and reducing the light-tight rate.
The demister 350 can be used to trap larger particles in the exhaust gas and also can be used to filter out liquid or moisture in the exhaust gas. The first defogging layer 350a disposed between the first filling layer 340a and the second filling layer 340b filters particles and liquid generated in the first filling layer 340a, and the second defogging layer 350b disposed between the filter screen 320 and the exhaust port 316 is used to filter excess gas or moisture, so as to prevent the exhaust gas from containing a large amount of liquid. The location and number of the defogging layers 350 are shown in fig. 3 for illustration only and are not intended to limit the present disclosure. In fact, the exhaust gas treatment device 300 may be provided with any number of defogging layers 350, and the defogging layers 350 may be disposed in any position of the housing 312, however, the defogging layers 350 are not suitable for being disposed in the air inlet 314 or the air outlet 316, and the installation of the defogging layers 350 may cause the pressure difference between the air inlet 314 and the air outlet 316 to rise due to the small pipe diameters of the air inlet 314 and the air outlet 316. In some embodiments, the defogging layer 350 may be obliquely disposed or vertically disposed.
The water spraying device 330 is disposed between the air inlet 314 and the filter screen 320, that is, the filter screen 320 is disposed under the water spraying device 330 (e.g., the third water spraying device 330c) closest to the air outlet 316, and the water is sprayed to the filter screen 320 by the water spraying device 330. In some embodiments, the filtering net 320 may be disposed obliquely or vertically, and the oblique disposition may enable the liquid sprayed by the water spraying device 330 to be attached to the surface of the filtering net 320 in cooperation with the air flow direction. It should be noted that the filter screen 320 may not be disposed in the exhaust port 316, and the arrangement of the filter screen 320 may cause the pressure difference between the air inlet 314 and the exhaust port 316 to greatly increase due to the small pipe diameter of the exhaust port 316, thereby affecting the performance of the air draft device connected to the rear end.
In some embodiments, the exhaust treatment device 300 may optionally include a drain unit 360 disposed below the body 310 and in communication with the housing 312. The liquid sprayed by the water spray device 330 is collected by the drainage unit 360, and after water quality circulation, the liquid is returned to the water spray device 330 again, or used for other applications.
In one embodiment, the exhaust gas contains particlesThe concentration of microparticles with a diameter of more than 10 microns in the air inlet is 4400 mu g/Nm 3 After the waste gas treatment equipment disclosed by the invention is used, the concentration of the waste gas at the exhaust port can be reduced to 1000 mu g/Nm 3 (ii) a The concentration of particulates having a particle size of 2.5 microns to 10 microns in the exhaust gas may be from 450 μ g/Nm 3 Down to 150. mu.g/Nm 3 (ii) a The concentration of particulates having a particle size of 1 micron to 2.5 microns in the exhaust gas may be from 750 μ g/Nm 3 Down to 150. mu.g/Nm 3 (ii) a The concentration of particulates having a particle size of 0.1 to 1 micron in the exhaust gas may be from 3400 μ g/Nm 3 Reduced to 1100. mu.g/Nm 3 。
In other words, according to the concentration of the exhaust gas at the inlet and the outlet of the exhaust gas treatment device, the exhaust gas treatment device of the present disclosure can achieve 77% removal efficiency of particles with a particle size of greater than 10 microns, about 67% removal efficiency of particles with a particle size of 2.5 microns to 10 microns, about 80% removal efficiency of particles with a particle size of 1 micron to 2.5 microns, and 71% removal efficiency of particles with a particle size of 0.1 micron to 1 micron.
By applying the waste gas treatment equipment disclosed by the invention, salt particles with smaller particle sizes can be greatly removed through the water film formed on the surface of the filter screen. Therefore, the white smoke emission can be greatly reduced, and the light-tight rate can be greatly reduced. In addition, the filter screen is not easy to be blocked by particles, so that the frequency of equipment maintenance can be effectively reduced.
The various embodiments provide a number of advantages over the prior art. It is understood that not all advantages need be discussed herein, that no advantages are applicable to all embodiments, and that other embodiments may provide different advantages.
According to some embodiments of the present disclosure, an exhaust gas treatment device is provided. The waste gas treatment equipment comprises a body, a filter screen and a water spraying device. The body comprises a shell, and an air inlet and an air outlet which are respectively arranged at two opposite ends of the shell. The inlet is tapered and the outlet is tapered in a direction from the inlet to the outlet. The filter screen is arranged in the shell. The average thickness of the filter screen is 0.4 cm to 1.0 cm. The water spraying device is arranged in the shell and between the air inlet and the filter screen, and at least one water spraying device sprays water towards the filter screen.
In some embodiments, the exhaust gas treatment apparatus further includes a filler layer disposed in the housing, and the filler layer is disposed between the water spraying device and the air inlet.
In some embodiments, the above-described exhaust treatment device further comprises a defogging layer disposed within the housing.
In some embodiments, the filter mesh comprises a nonwoven fabric filter mesh.
In some embodiments, the above-mentioned exhaust gas treatment device is horizontally or vertically disposed.
According to other embodiments of the present disclosure, an exhaust treatment device is provided. The waste gas treatment equipment comprises a body, a filter screen, a filling layer, a demisting layer and a water spraying device. The body comprises a shell, and an air inlet and an air outlet which are arranged at two opposite ends of the shell. The inlet is gradually opened and the outlet is gradually reduced along the direction from the inlet to the outlet. The filter screen is arranged in the shell. The average thickness of the filter screen is 0.4 cm to 1.0 cm. The filling layer is arranged between the air inlet and the filter screen. The defogging layer is arranged in the shell. The water spraying device is arranged on one side wall of the shell and between the air inlet and the filter screen, and the water spraying device sprays liquid towards the filling layer.
In some embodiments, the filter mesh comprises a nonwoven fabric filter mesh.
In some embodiments, the mist removing layer and the filter screen are disposed obliquely or vertically.
In some embodiments, the liquid comprises water, an acidic solution, a basic solution, and any combination thereof.
In some embodiments, the filling layer and the defogging layer each include a plurality of raschig rings.
These and other features of many embodiments are described in order to provide a better understanding of the aspects of the present disclosure. Those skilled in the art should appreciate that they may readily use the present disclosure as a basis for designing or modifying other processes and structures for carrying out the same purposes and/or achieving the same advantages of the embodiments introduced herein. Those skilled in the art should also realize that such equivalent constructions do not depart from the spirit and scope of the present disclosure, and that they may make various changes, substitutions, and alterations herein without departing from the spirit and scope of the present disclosure.
Claims (9)
1. An exhaust gas treatment device, comprising:
the body comprises a shell, an air inlet and an air outlet, wherein the air inlet and the air outlet are respectively arranged at two opposite ends of the shell, and the air inlet is gradually opened and the air outlet is gradually reduced along the direction from the air inlet to the air outlet;
a filter screen disposed in the housing, wherein the filter screen is a non-woven filter screen, and an average thickness of the filter screen is 0.4 cm to 1.0 cm; and
and a plurality of water spraying devices arranged in the shell and between the air inlet and the filter screen, wherein the plurality of water spraying devices comprise a plurality of first water spraying devices arranged to spray water towards the filter screen so as to form a layer of water film on the surface of the filter screen, the plurality of water spraying devices comprise a plurality of second water spraying devices arranged to spray water towards the air inlet, and the plurality of first water spraying devices and the plurality of second water spraying devices are seen from the air inlet to the air outlet, and at least one of the plurality of first water spraying devices is positioned between two adjacent ones of the plurality of second water spraying devices.
2. The exhaust treatment device of claim 1, further comprising a plurality of packing layers disposed within the housing and between the plurality of water injection devices and the air inlet.
3. The exhaust gas treatment device of claim 1, further comprising a plurality of demisting layers disposed within the housing.
4. The exhaust gas treatment device of claim 1, wherein the exhaust gas treatment device is horizontally or vertically disposed.
5. An exhaust gas treatment device, comprising:
the body comprises a shell, an air inlet and an air outlet, wherein the air inlet and the air outlet are arranged at two opposite ends of the shell, and the air inlet is gradually opened and the air outlet is gradually reduced along the direction from the air inlet to the air outlet;
a first filter screen disposed within the housing, wherein an average thickness of the filter screen is 0.4 cm to 1.0 cm;
the first filling layers are arranged between the air inlet and the first filter screen;
the first defogging layer is arranged in the shell and is arranged between the exhaust port and the first filter screen;
a plurality of first water spraying devices arranged on one side wall of the shell, wherein the plurality of first water spraying devices are arranged between the air inlet and the first filter screen when viewed from top, and the plurality of first water spraying devices are arranged to spray a first liquid towards the plurality of first filling layers;
a second filter screen arranged in the shell and between the exhaust port and the first demisting layer;
the second filling layers are arranged in the shell and are arranged between the first defogging layers and the second filter screen;
the second defogging layer is arranged in the shell and is arranged between the air outlet and the second filter screen;
a plurality of second water spraying devices arranged on the side wall of the shell, wherein the plurality of second water spraying devices are arranged between the exhaust port and the first demisting layer when viewed from top, and the plurality of second water spraying devices are arranged to spray a second liquid towards the plurality of second filling layers; and
and the third water spraying device is arranged on the side wall of the shell, at least part of the third water spraying device is arranged between the plurality of second filling layers and the second filter screen when viewed from top, and the third water spraying device is arranged to directly spray a third liquid towards the second filter screen.
6. The exhaust gas treatment apparatus of claim 5, wherein the first filter and the second filter comprise nonwoven fabric filters.
7. The exhaust gas treatment apparatus according to claim 5, wherein the first demister layer, the second demister layer, the first filter and the second filter are disposed obliquely or vertically.
8. The exhaust gas treatment device of claim 5, wherein the first liquid, the second liquid, and the third liquid comprise water, an acidic solution, a basic solution, and any combination thereof.
9. The exhaust gas treatment device of claim 5, wherein the first packed beds, the second packed beds, the first demister layer, and the second demister layer each comprise a plurality of raschig rings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810946433.4A CN110841401B (en) | 2018-08-20 | 2018-08-20 | Exhaust gas treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810946433.4A CN110841401B (en) | 2018-08-20 | 2018-08-20 | Exhaust gas treatment equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110841401A CN110841401A (en) | 2020-02-28 |
| CN110841401B true CN110841401B (en) | 2022-09-06 |
Family
ID=69595554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810946433.4A Active CN110841401B (en) | 2018-08-20 | 2018-08-20 | Exhaust gas treatment equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110841401B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205287963U (en) * | 2015-12-08 | 2016-06-08 | 中昕实业有限公司 | Contamination gas filtration equipment |
| CN205379770U (en) * | 2016-02-04 | 2016-07-13 | 长安大学 | Dual boot formula air purification device |
| CN205730637U (en) * | 2016-06-23 | 2016-11-30 | 上海盛剑环境系统科技有限公司 | Gas treatment equipment |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100818309B1 (en) * | 2006-08-18 | 2008-03-31 | 신도건공 주식회사 | Method and apparatus for demisting NOx from exhaust gas using reactors installed in lateral sequence |
| CN201625483U (en) * | 2010-03-30 | 2010-11-10 | 东莞市台盛机械设备有限公司 | Structure of horizontal washing tower |
| CN202762265U (en) * | 2012-08-14 | 2013-03-06 | 淄博金河风机有限公司 | Wet dust removal fan |
| CN204121962U (en) * | 2014-10-20 | 2015-01-28 | 晃谊科技股份有限公司 | Horizontal gas cleaning plant |
| CN206082024U (en) * | 2016-08-26 | 2017-04-12 | 吴江市兆舜玻璃钢制品有限公司 | Horizontal washing tower |
| CN206934997U (en) * | 2017-04-25 | 2018-01-30 | 佛山市本立环保科技有限公司 | A kind of Horizental showering tower apparatus |
| CN207056218U (en) * | 2017-06-21 | 2018-03-02 | 北京柯美瑞环保科技有限公司 | Multistage aerosol wash mill |
| CN108176200A (en) * | 2018-02-28 | 2018-06-19 | 苏州顶裕节能设备有限公司 | A kind of mist of chromic acid efficient process equipment |
-
2018
- 2018-08-20 CN CN201810946433.4A patent/CN110841401B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205287963U (en) * | 2015-12-08 | 2016-06-08 | 中昕实业有限公司 | Contamination gas filtration equipment |
| CN205379770U (en) * | 2016-02-04 | 2016-07-13 | 长安大学 | Dual boot formula air purification device |
| CN205730637U (en) * | 2016-06-23 | 2016-11-30 | 上海盛剑环境系统科技有限公司 | Gas treatment equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110841401A (en) | 2020-02-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100948052B1 (en) | System for removing noxious substances from industrial gases | |
| US7708803B2 (en) | Method and apparatus for the enhanced removal of aerosols from a gas stream | |
| KR101172708B1 (en) | wet type gas scrubber | |
| JP3035624B2 (en) | Exhaust gas treatment method and apparatus | |
| KR101898890B1 (en) | Filter Assembly for Horizontal Wet Scrubber and Method of Structuring Thereof | |
| CN104307345A (en) | Soot desulfurization deduster | |
| CN204543874U (en) | A kind of house exhaust dust arrester | |
| CN104587783B (en) | A kind of house exhaust dust arrester | |
| KR101726299B1 (en) | Filter Assembly for Horizontal Wet Scrubber and Method of Structuring Thereof | |
| CN110841401B (en) | Exhaust gas treatment equipment | |
| RU2465037C1 (en) | Fibrous filter | |
| CN206572625U (en) | Electrostatic spray is combined wet filter system | |
| KR200425748Y1 (en) | Water layer generating structure of impinjet scrubber | |
| CN110496485A (en) | A kind of rotation pipe wet scrubber | |
| TWI718404B (en) | Flue gas treatment equipment | |
| KR102589114B1 (en) | Hazardous Exhaust Gas Wet Purification device | |
| EP0853971A1 (en) | Apparatus and method for wet type simultaneous decontaminating and dust-removing gas treatment | |
| CN212327766U (en) | Double-circulation washing tower | |
| KR102135145B1 (en) | A dust treatment system with water and oil mist during textile dyeing process | |
| JP2004202306A (en) | Air cleaner | |
| CN209952474U (en) | Liquid washing air purifier | |
| CN207722485U (en) | A kind of efficient baffling collision type mist eliminator of self-cleaning | |
| KR20010099472A (en) | Waste heat recovering type absorber and system for eliminating harmful material and recovering waste heat of exhaust gas thereof | |
| CN111921302A (en) | Double-circulation washing tower | |
| TWI699234B (en) | Device for capturing particles |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |