CN108786420B - Exhaust treatment system with smoke plume takes off white function - Google Patents
Exhaust treatment system with smoke plume takes off white function Download PDFInfo
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- CN108786420B CN108786420B CN201810656073.4A CN201810656073A CN108786420B CN 108786420 B CN108786420 B CN 108786420B CN 201810656073 A CN201810656073 A CN 201810656073A CN 108786420 B CN108786420 B CN 108786420B
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- 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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
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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
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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Abstract
The invention provides a waste gas treatment system with a smoke plume whitening function, which comprises: the device comprises a gas distribution port, a combustion furnace, a ceramic filter, a bubbling bed gas filter, an absorber and a gas circulation pipeline, wherein a sub-control valve is arranged in the gas circulation pipeline, when the contents of sulfide and nitride in gas in the gas circulation pipeline are lower than preset values, the gas circulation pipeline sub-control valve is opened, the gas is discharged into the atmosphere, otherwise, the sub-control valve is closed, and the gas enters the combustion furnace again; the smoke condensation water separation heat exchange device is arranged between the first demister and the second demister, the smoke condensation water separation heat exchange device adopts a vertical arrangement mode, a cold source adopts low-temperature water of a plant circulating water system, water after heat exchange returns to a circulating water return system, and the content of water vapor in smoke is remarkably reduced after passing through the second demister, so that the effect of smoke plume whitening is achieved. The invention can realize three purposes of desulfurization, dust removal and whitening.
Description
Technical Field
The invention relates to the field of environment-friendly machinery, in particular to a waste gas treatment system with a smoke plume de-whitening function.
Background
The waste gas refers to toxic and harmful gas discharged by human in the production and living process. Especially chemical plants, steel plants, pharmaceutical plants, coking plants and oil refineries, etc., the discharged waste gas has large odor, seriously pollutes the environment and affects the human health.
The exhaust gas contains many kinds of pollutants, and the physical and chemical properties of the pollutants are very complex and the toxicity of the pollutants is different. The exhaust gas discharged from the fuel combustion contains sulfur dioxide, nitrogen oxides (NOx), hydrocarbons, smoke, and the like. The pollution of the atmosphere environment by exhaust gas is one of the most common and serious environmental problems in the world.
In the conventional process, desulfurization and dust removal are respectively completed in respective devices as independent unit operations, and the independent waste gas treatment process has high cost, wastes space and is complex in process, so that a waste gas treatment system with a smoke plume whitening function needs to be developed, and the two purposes of desulfurization and dust removal are achieved together. In addition, the flue gas carries excessive saturated vapor, the temperature of the flue gas is reduced in the discharging process, the water in the flue gas reaches a supersaturated state, and the vapor is condensed at the outlet of a chimney, so that a white smoke plume phenomenon is formed and needs to be treated.
Disclosure of Invention
In order to solve the above technical problems, the present invention provides an exhaust gas treatment system with a smoke plume whitening function.
The invention is realized by the following technical scheme:
an exhaust treatment system with a plume whitening function, the exhaust treatment system comprising: the device comprises a gas distribution port, a combustion furnace, a ceramic filter, a bubbling bed gas filter, an absorber and a gas circulation pipeline, wherein the gas distribution port is communicated with a first gas inlet of the combustion furnace, a gas outlet of the combustion furnace is communicated with a gas inlet of the ceramic filter through a first pipeline, a gas outlet of the ceramic filter is communicated with a gas inlet of the bubbling bed gas filter through a second pipeline, a gas outlet of the bubbling bed gas filter is communicated with a gas inlet of the absorber, a gas outlet of the absorber is communicated with a first circulation port of the gas circulation pipeline, and a second circulation port of the gas circulation pipeline is communicated with a second gas inlet of the combustion furnace;
the gas circulation pipeline is internally provided with a sub-control valve, when the contents of sulfide and nitride in the gas circulation pipeline are lower than preset values, the sub-control valve of the gas circulation pipeline is opened, the gas is discharged into the atmosphere, otherwise, the sub-control valve is closed, and the gas enters the combustion furnace again;
the smoke condensation water separation heat exchange device is arranged between the first demister and the second demister, the smoke condensation water separation heat exchange device adopts a vertical arrangement mode, a cold source adopts low-temperature water of a plant circulating water system, water after heat exchange returns to a circulating water return system, and the content of water vapor in smoke is remarkably reduced after the water vapor passes through the second demister, so that the effect of smoke plume whitening is achieved.
Further, a first diameter of a cross-section of a junction of the first conduit and the gas inlet of the ceramic filter is variable.
Further, a second diameter of a cross-section of a junction of the second conduit and the gas inlet of the bubbling bed gas filter is variable.
Further, a first air flow velocity detector is arranged inside the first pipeline, a second air flow velocity detector is arranged inside the second pipeline, the first air flow velocity detector and the second air flow velocity detection area are communicated with the controller, so that the controller controls the size of the first diameter according to the air flow velocity obtained by the first air flow velocity detector, and controls the size of the second diameter according to the air flow velocity obtained by the second air flow velocity detector.
Further, the airflow velocity at the first duct is greater than the airflow velocity at the second duct.
The invention has the following beneficial effects:
(1) the three purposes of desulfurization, dust removal and whitening can be realized;
(2) the full-automatic desulfurization and dust removal process can be accurately controlled, the degree of automation is high, the desulfurization efficiency is high, and the dust removal effect is good.
Drawings
FIG. 1 is a schematic view of an exhaust treatment system according to the present embodiment;
FIG. 2 is a schematic front view of a first pipeline provided in the present embodiment;
FIG. 3 is a schematic top view of the duct body provided in this embodiment in a fully deployed configuration;
FIG. 4 is a flow chart of a method for manufacturing a filtering portion of a first filter according to the present embodiment;
FIG. 5 is a flow chart of a method for manufacturing a filtering portion of a second filter according to the present embodiment;
FIG. 6 is a schematic view of a bubbling bed gas filter provided in the present embodiment;
fig. 7 is a flowchart of a method for obtaining the porous ceramic plate according to the present embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
An embodiment of the present invention provides a waste gas treatment system with a smoke plume whitening function, as shown in fig. 1, the waste gas treatment system includes: the device comprises a gas distribution port 1, a combustion furnace 2, a ceramic filter 3, a bubbling bed gas filter 4, an absorber 5 and a gas circulation pipeline 6, wherein the gas distribution port 1 is communicated with a first gas inlet 01 of the combustion furnace 2, a gas outlet of the combustion furnace 2 is communicated with a gas inlet of the ceramic filter 3 through a first pipeline 10, a gas outlet of the ceramic filter 3 is communicated with a gas inlet of the bubbling bed gas filter 4 through a second pipeline 20, a gas outlet of the bubbling bed gas filter 4 is communicated with a gas inlet of the absorber 5, a gas outlet of the absorber 5 is communicated with a first circulation port of the gas circulation pipeline 6, and a second circulation port of the gas circulation pipeline 6 is communicated with a second gas inlet 02 of the combustion furnace 2. And a sub-control valve is arranged in the gas circulation pipeline 6, when the contents of sulfide and nitride in the gas circulation pipeline are lower than preset values, the sub-control valve of the gas circulation pipeline is opened, the gas is discharged into the atmosphere, otherwise, the sub-control valve is closed, and the gas enters the combustion furnace 2 again.
Furthermore, a first demister and a second demister which are identical in structure are further arranged on a passage on which the sub-control valve is opened, a flue gas condensation water-separation heat exchange device is arranged between the first demister and the second demister, the flue gas condensation water-separation heat exchange device is vertically arranged, a cold source adopts low-temperature water of a plant area circulating water system, water after heat exchange returns to a circulating water return system, and the content of water vapor in flue gas is remarkably reduced after passing through the second demister, so that the effect of smoke plume whitening is achieved.
The first diameter of the cross-section at the junction of the first tube 10 and the gas inlet of the ceramic filter 3 is variable, as is the second diameter of the cross-section at the junction of the second tube 20 and the gas inlet of the bubbling bed gas filter 5. Specifically, a first air flow velocity detector is disposed inside the first duct 10, a second air flow velocity detector is disposed inside the second duct 20, and the first air flow velocity detector and the second air flow velocity detection region are communicated with a controller, so that the controller controls the size of the first diameter according to the air flow velocity acquired by the first air flow velocity detector, and controls the size of the second diameter according to the air flow velocity acquired by the second air flow velocity detector.
The diameter of the cross section of the junction of the first duct 10 with the gas outlet of the burner 2 is constant and the first diameter of the cross section of the junction of the first duct 10 with the gas inlet of said ceramic filter 3 is variable, so that the gas flow rate in the first duct can be adjusted by varying the volume of the first duct 10, and likewise the gas flow rate of the second duct 20 is also adjustable. It is emphasized that the embodiments of the present invention do not limit the specific structure of the first duct 10 and the second duct 20 that can achieve the above technical effects.
For convenience of describing a specific technical solution of the present application, the embodiment of the present invention provides a feasible structure of the first pipeline and the second pipeline, and the structure of the first pipeline and the structure of the second pipeline may be the same, and of course, the structure does not limit the protection scope of the present application.
Taking a first pipe as an example, as shown in fig. 2, the connection point of the first pipe 10 and the gas outlet of the combustion furnace 2 is a first end 100 of the first pipe 10, and the connection point of the first pipe 10 and the gas inlet of the ceramic filter 3 is a second end 200 of the first pipe 10. The first end portion 100 and the second end portion 200 are connected by a pipe body 300. As shown in fig. 3, the duct body 300 is composed of a plurality of sector brackets 301 and a flexible portion 302 connecting two adjacent sector brackets. The cross-sectional diameter of the second end portion 200 varies with the extent to which the sector supports 301 extend, and the provision of the flexible portion 302 between the two sector supports ensures that the variation in the cross-sectional diameter of the second end portion does not affect the tightness of the first conduit.
Specifically, taking a sector bracket as an example, the sector bracket is rotatably connected to the first end portion 100, the extension degree of the sector bracket is changed by rotating the connection portion of the sector bracket to the first end portion 100, an arc-shaped connection portion 201 is provided at the second end portion, and the arc-shaped connection portion 201 is matched with the extension track of the sector bracket, so that the sector bracket is always in contact with the second end portion 200 during the extension process, and the sealing performance of the first pipeline 10 is ensured.
In the actual exhaust gas treatment process, the ceramic filter 3 performs a preliminary dust-removal desulfurization filtering operation on the gas, and the bubbling bed gas filter 4 performs a further dust-removal desulfurization filtering operation. The air flow velocity at the first duct 10 should be greater than the air flow velocity at the second duct 20. The reason is that: the speed of gas in the ceramic filter passing through the ceramic filter is increased, the inertial collision effect is strengthened, and the dust removal efficiency is improved. And for the bubbling bed gas filter 4, the gas flow speed of the second pipeline is reduced, so that the time for the gas to stay in the dense-phase bubbling bed area is increased, and the dust removal efficiency is improved.
Specifically, the embodiment of the present invention further provides a specific structure of the ceramic filter 3, and the ceramic filter 3 is used for performing desulfurization and dust removal operations on gas.
The ceramic filter 3 is a double-layer filter composed of a first filter 31 and a second filter 32 connected to each other. The first filter 31 and the second filter 32 are both hemispherical filters, so that pressure difference generated by different flowing conditions of gas on a curved surface is facilitated, and the purpose of communication between the inside and the outside of the filters is achieved. The diameter of the first filter 31 is smaller than the diameter 32 of the second filter, and this is designed so that the second filter 32 is closer to the bubbling bed gas filter 4, and the velocity of the gas after passing through the second filter 32 having a larger diameter can be further reduced.
Specifically, as shown in fig. 4, the embodiment of the present invention provides a method for preparing the filtering portion of the first filter, including:
s101, mixing the first dedusting recovery material, the second dedusting recovery material and calcium hydroxide according to the proportion of 1:1: 5.
Specifically, the first dust removal recovery material and the second dust removal recovery material are products recovered in a gas dust removal process after coal combustion, and can be easily obtained in a common industrial process. The first dedusting recycle is required to have the content of alkali metals such as calcium oxide, magnesium oxide and the like as effective desulfurization components of more than 50 percent of the total mass. The second dedusting recycling material is required to have the content of ferric oxide and ferrous oxide more than 40%.
And S102, adding water into the mixture, mixing, and roasting for 2 hours.
The first dedusting recycling substance and the second dedusting recycling substance can be used as additives of calcium hydroxide to improve the utilization rate of desulfurization and the duration of desulfurization, and the composite metal oxide can be obtained by mixing with the calcium hydroxide and using the process of the embodiment of the invention, so that the pores of the desulfurizing agent are optimized, and the reaction speed and the utilization rate of calcium are improved.
S103, grinding the roasted mixture.
S104, pouring the obtained mixed powder into hemispherical Si3N4In the porous ceramic, the semi-spherical Si is continuously rotated and lightly vibrated3N4Porous ceramics of Si3N4The pores of the porous ceramic are filled with matrix powder.
Specifically, the Si3N4The porous ceramic has a pore size of 0.4mm or less.
S105, mixing Si3N4Placing the porous ceramic into a sintering furnace, preserving heat for 2 hours at 800 ℃ under the protection of nitrogen, and naturally cooling to room temperature to obtain the semi-spherical Si3N4As a filtering portion of the first filter.
Proved by experiments, the hemispherical Si obtained in the embodiment of the invention3N4Can play a role in desulfurization, and when the waste gas passes through the first filter, the semi-spherical Si3N4The particle diameter of the desulfurizer is matched with the current speed of the waste gas, so that the formation of a filter cake is facilitated, and the dust removal efficiency is improved.
Specifically, as shown in fig. 5, the embodiment of the present invention provides a method for preparing the filtering portion of the second filter, including:
s201, uniformly mixing vermiculite, diatomite, desulfurized ash, seashell mud, diammonium phosphate and magnesium-complexed 8-hydroxyquinoline.
Specifically, the mass ratio of the above materials may be set according to actual needs, and the embodiment of the present invention is not particularly limited.
S202, adding water into the mixture, pulping to obtain slurry, roasting for 2 hours, and putting the slurry into a crusher for crushing.
And S203, performing coarse grinding and fine grinding on the crushed mixture.
And S204, filling the mixture after fine grinding into a ball milling tank filled with helium for mixing for 12 hours, and taking out the grinding balls after the mixing is finished.
S205, pouring the obtained mixed powder into the hemispherical SiC porous ceramic, and filling the pores of the SiC porous ceramic with matrix powder by continuously rotating and slightly vibrating the hemispherical SiC porous ceramic.
Specifically, the SiC porous ceramic has a void particle size of 0.4mm or less.
S206, putting the SiC porous ceramic into a sintering furnace, preserving the heat for 2 hours at 1000 ℃ under the protection of nitrogen, and naturally cooling to room temperature to obtain a second filter part.
Tests prove that the second filter filtering part obtained in the embodiment of the invention can play a better role in dust removal and dust collection.
Specifically, embodiments of the present invention provide a bubbling bed gas filter.
As shown in fig. 6, a closed inner cavity 40 is arranged in the bubbling bed gas filter 4, and a plurality of filter plates 41 are horizontally arranged in the closed inner cavity 40. One side of the closed inner cavity 40 is communicated with the gas inlet of the bubbling bed gas filter, and the other side of the closed inner cavity is communicated with the absorber 5.
A plurality of sieve plates 42 are vertically arranged in the closed inner cavity 40, and the sieve plates 42 are arranged above the filter plates 41 and used for gathering flue gas.
The filter plate 41 in the closed inner cavity 40 is specifically a porous ceramic plate, and the porous ceramic plate has the following structure: the composite material comprises a framework formed by porous ceramics, wherein a porous nanometer space is formed in the framework, and polarized adsorption components, active slag particles and charcoal particles are contained in the nanometer space.
Specifically, as shown in fig. 7, the embodiment of the present invention provides a method for obtaining the porous ceramic plate:
s301, weighing the nanometer tourmaline powder subjected to heat treatment.
S302, adding water into the nano tourmaline powder, stirring, performing ultrasonic dispersion, adding a polytetrafluoroethylene emulsion, and stirring again.
S303, weighing sodium alginate, sodium carboxymethyl cellulose, active slag particles and charcoal particles, mixing the sodium alginate, the sodium carboxymethyl cellulose, the active slag particles and the charcoal particles with the liquid obtained in the previous step, and performing ultrasonic dispersion to obtain a mixed liquid;
s304, mixing Al2O3Immersing the mixed solution in a porous ceramic plate to obtain Al2O3And putting the porous ceramic plate into a sintering furnace, preserving the heat for 2 hours at 200 ℃ under the protection of nitrogen, and naturally cooling to room temperature.
S305. adding Al2O3The porous ceramic plate adopts a corona charging mode to carry out electret polarization and store electric charge.
The porous ceramic plate obtained by the embodiment of the invention can adsorb dust in smoke dust by using the electrostatic adsorption principle, thereby improving the dust filtering efficiency. Because the tourmaline is subjected to overheating treatment, when the temperature is reduced, the polarity of the surface of the tourmaline can be changed, and dust on the surface of the tourmaline can be separated from the porous ceramic plate to fall to the bottom of the closed inner cavity due to the repulsion of like charges, so that the dust can be collected conveniently.
Specifically, the absorber includes a concentration section and an absorption section.
The absorption section is used for absorbing SO in the flue gas2The formed ammonium sulfite solution flows automatically in the oxidation tank, air blown into the bottom of the oxidation tank is oxidized into ammonium sulfate solution, and part of the ammonium sulfate solution flows back to the concentration part.
The concentration section is used for pumping ammonium sulfate into a concentrated solution spraying layer through a concentration pump, so that the temperature of the flue gas is reduced, the concentration section is concentrated, and ammonium sulfate slurry with the solid content of 5% -15% is obtained.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (3)
1. The utility model provides a waste gas treatment system with smoke plume takes off white function which characterized in that:
the exhaust gas treatment system includes: the device comprises a gas distribution port, a combustion furnace, a ceramic filter, a bubbling bed gas filter, an absorber and a gas circulation pipeline, wherein the gas distribution port is communicated with a first gas inlet of the combustion furnace, a gas outlet of the combustion furnace is communicated with a gas inlet of the ceramic filter through a first pipeline, a gas outlet of the ceramic filter is communicated with a gas inlet of the bubbling bed gas filter through a second pipeline, a gas outlet of the bubbling bed gas filter is communicated with a gas inlet of the absorber, a gas outlet of the absorber is communicated with a first circulation port of the gas circulation pipeline, and a second circulation port of the gas circulation pipeline is communicated with a second gas inlet of the combustion furnace; a first diameter of a cross-section of a junction of the first conduit and a gas inlet of the ceramic filter is variable; a second diameter of a cross-section of a junction of the second conduit and the gas inlet of the bubbling bed gas filter is variable;
the gas circulation pipeline is internally provided with a sub-control valve, when the contents of sulfide and nitride in the gas circulation pipeline are lower than preset values, the sub-control valve of the gas circulation pipeline is opened, the gas is discharged into the atmosphere, otherwise, the sub-control valve is closed, and the gas enters the combustion furnace again;
a first demister and a second demister which are identical in structure are further arranged on a channel on which the sub-control valve is opened, a flue gas condensation water-separation heat exchange device is arranged between the first demister and the second demister, the flue gas condensation water-separation heat exchange device adopts a vertical arrangement mode, a cold source adopts low-temperature water of a plant circulating water system, the water after heat exchange returns to a circulating water return system, and the content of water vapor in flue gas is remarkably reduced after passing through the second demister, so that the effect of removing white smoke from smoke plume is achieved;
the joint of the first pipeline and a gas outlet of a combustion furnace is the first end part of the first pipeline, and the joint of the first pipeline and a gas inlet of the ceramic filter is the second end part of the first pipeline; the first end part and the second end part are connected through a pipeline body, the pipeline body is composed of a plurality of fan-shaped supports and flexible parts for connecting two adjacent fan-shaped supports, the fan-shaped supports are different in extension degree, the diameters of the cross sections of the second end parts are different, and the arrangement of the flexible parts between the two fan-shaped supports ensures that the diameters of the cross sections of the second end parts are different and the sealing performance of the first pipeline is not influenced; the fan-shaped support is rotatably connected with the first end part, the extension degree of the fan-shaped support is changed by rotating the connecting part of the fan-shaped support and the first end part, the second end part is provided with an arc-shaped connecting part, and the arc-shaped connecting part is matched with the extension track of the fan-shaped support, so that the fan-shaped support is always in contact with the second end part in the extension process, and the sealing property of the first pipeline is ensured;
the ceramic filter is a double-layer filter consisting of a first filter and a second filter which are connected with each other, the first filter and the second filter are both hemispherical filters, the diameter of the first filter is smaller than that of the second filter, and the speed of gas passing through the second filter with the larger diameter is further reduced;
a method of making the first filter filtration section comprising:
s101, mixing the first dust removal recovery material, the second dust removal recovery material and calcium hydroxide according to the proportion of 1:1: 5; the content of effective desulfurization components of calcium oxide and magnesium oxide in the first dedusting recycling object reaches more than 50 percent of the total mass; the content of ferric oxide and ferrous oxide in the second dedusting recycling material reaches more than 40 percent;
s102, adding water into the mixture, mixing, and roasting for 2 hours;
s103, filling the roasted mixture into a grinding machine for grinding;
s104, pouring the obtained mixed powder into hemispherical Si3N4 porous ceramic, and filling matrix powder into the pores of the Si3N4 porous ceramic by continuously rotating and lightly vibrating the hemispherical Si3N4 porous ceramic;
s105, putting the Si3N4 porous ceramic into a sintering furnace, preserving heat for 2 hours at 800 ℃ under the protection of nitrogen, naturally cooling to room temperature, and taking the obtained semi-spherical Si3N4 as a filtering part of a first filter;
a method of making the second filter filtration section comprising:
s201, uniformly mixing vermiculite, diatomite, desulfurized ash, seashell mud, diammonium phosphate and magnesium complexed 8-hydroxyquinoline;
s202, adding water into the mixture, pulping to prepare slurry, roasting for 2 hours, and putting the slurry into a crusher for crushing;
s203, carrying out coarse grinding and fine grinding on the crushed mixture;
s204, placing the mixture after fine grinding in a ball milling tank filled with helium for mixing for 12 hours, and taking out the grinding balls after the mixing is finished;
s205, pouring the obtained mixed powder into the hemispherical SiC porous ceramic, and filling matrix powder into pores of the SiC porous ceramic by continuously rotating and slightly vibrating the hemispherical SiC porous ceramic;
s206, putting the SiC porous ceramic into a sintering furnace, preserving heat for 2 hours at 1000 ℃ under the protection of nitrogen, and naturally cooling to room temperature to obtain a second filter part;
a closed inner cavity is formed in the bubbling bed gas filter, and a plurality of filter plates which are horizontally arranged are arranged in the closed inner cavity; one side of the closed inner cavity is communicated with a gas inlet of the bubbling bed gas filter, and the other side of the closed inner cavity is communicated with the absorber; a plurality of sieve plates which are vertically arranged are arranged in the closed inner cavity, and the sieve plates are arranged above the filter plates.
2. The exhaust gas treatment system with a smoke plume whitening function as claimed in claim 1, wherein:
the first pipeline is internally provided with a first air flow speed detector, the second pipeline is internally provided with a second air flow speed detector, the first air flow speed detector and the second air flow speed detector are communicated with a controller, the controller controls the size of the first diameter according to the air flow speed acquired by the first air flow speed detector, and controls the size of the second diameter according to the air flow speed acquired by the second air flow speed detector.
3. The exhaust gas treatment system with a smoke plume whitening function as claimed in claim 2, wherein:
the airflow velocity at the first duct is greater than the airflow velocity at the second duct.
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| CN105698199A (en) * | 2016-03-31 | 2016-06-22 | 山东金升有色集团有限公司 | Treatment device of dioxins atmospheric pollutants in high-temperature flue gas |
| CN205867920U (en) * | 2016-08-03 | 2017-01-11 | 国电科学技术研究院 | Novel coal fired power plant plume treatment system |
| CN206325385U (en) * | 2016-12-16 | 2017-07-14 | 刘春海 | Bubbling bed gas filtration tapping equipment |
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