CN109045918B - Air purification and wet flue gas dehumidification device - Google Patents

Air purification and wet flue gas dehumidification device Download PDF

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Publication number
CN109045918B
CN109045918B CN201811093414.8A CN201811093414A CN109045918B CN 109045918 B CN109045918 B CN 109045918B CN 201811093414 A CN201811093414 A CN 201811093414A CN 109045918 B CN109045918 B CN 109045918B
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China
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unit
stripping
flue gas
wet flue
bin
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CN201811093414.8A
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CN109045918A (en
Inventor
刘毅
孟晓东
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Beijing Yiliu Fluid Technology Co ltd
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Beijing Yiliu Fluid Technology Co ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D50/00Combinations of methods or devices for separating particles from gases or vapours
    • B01D50/10Combinations of devices covered by groups B01D45/00, B01D46/00 and B01D47/00
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/002Separation 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 by condensation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/06Polluted air

Abstract

The invention discloses an air purification and wet flue gas dehumidification device, wherein wet flue gas firstly enters a spray mixing unit, is sprayed by a spray head, is cooled and is fully mixed with spray water mist, the mixed wet flue gas enters a high-speed stripping unit, the centrifugal force of pure air is small, the pure air is blocked by a stripping inner bin rotating at a high speed and is directly discharged by an exhaust channel, partial air and fog drops pass through the stripping inner bin and are thrown to the inner wall of a stripping outer bin to form water flow flowing down, partial fine fog drops and the air form air flow with higher moisture content and enter a condensation dehumidification unit, water in the air is analyzed to form water film and water flow, the wet flue gas still containing partial fine liquid drops is finally introduced into an inertia separation unit to be separated, the treated pure air is discharged through the exhaust channel, and the whole process of wet flue gas dehumidification and air purification is completed. The wind resistance of the whole purification and dehumidification process is low, the requirements of high-speed flow and high throughput wet flue gas treatment are met, and the wet flue gas is dehumidified while air is purified.

Description

Air purification and wet flue gas dehumidification device
Technical Field
The invention relates to the technical field of air purification, in particular to an air purification and wet flue gas dehumidification device.
Background
In recent years, the problem of air pollution has become serious, and there are many kinds of existing air purification technologies, for example, a filtration technology, a washing tower, a water film fresh air technology, an inertial separation dust removal technology represented by cyclone dust removal, and the like. The inertial separation technology of cyclone dust collection is to utilize the high-speed motion mechanism of fluid to complete air purification, and other purification technologies can actively or passively realize air purification operation under the condition of reducing flow speed. Filtration technology relies on the effects of interception, inertia, diffusion, gravity, static electricity, etc. of the filter media to trap and adsorb suspended particles, allowing pure air to pass through, but filtration technology passively increases the wind resistance, improving air purification efficiency and accuracy at the expense of decreasing air flow rate. The technology for purifying combustion tail gas, chemical industry and indoor air by using washing tower and water film technology is characterized by that in the washing tower a high-position atomizing spray head can be used for downward spraying, the washing water flow can be downward flowed along the filler under the action of gravity and can be reversely flowed along the air which is upward flowed to increase the contact chance of them, and the water flow can be used for adsorbing and removing impurity component in the air, but the air flow speed can not be too high, so that the washing water can be removed by air flow, so that the diameter of washing tower can be expanded, and the air flow speed can be actively reduced. The cyclone dust removal mechanism is that dust-containing airflow makes rotary motion, dust particles are separated from the airflow and collected on the wall of the cyclone dust removal device by means of centrifugal force, and then the dust particles fall into an ash bucket by means of gravity.
High-temperature flue gas is also one of the important reasons for causing haze, and wet flue gas generally refers to industrial waste gas containing water vapor and liquid particles and discharged in large quantities, for example, flue gas containing a large quantity of desulfurization and denitrification solutions and having high moisture content after wet desulfurization and denitrification of coal-fired flue gas, and wet flue gas has the characteristics of large saturated moisture content, high temperature and complex components, and waste gas discharged from a chimney and formed after wet desulfurization and denitrification can form striking white plume in the sky, which is caused by the fact that the flue gas contains a large quantity of saturated desulfurization and denitrification solutions, and the solutions diffuse in the air to form long diffusion plume-shaped white flue gas flow, and the white plume carries considerable desulfurization and denitrification solutions, and a large quantity of solid fine particles which are difficult to find by naked eyes are scattered along with wind after water vapor disappears. The air purification device in the prior art can not give consideration to the whitening treatment of wet flue gas when purifying air particles.
Therefore, how to change the current situation that a common purification device cannot give consideration to both high-temperature wet flue gas and large-flow multi-component polluted air treatment in the prior art is a problem to be solved urgently by technical personnel in the field.
Disclosure of Invention
The invention aims to provide an air purification and wet flue gas dehumidification device, which solves the problems in the prior art, enables a purification device to dehumidify high-temperature wet flue gas and can purify large-flow multi-component polluted air.
In order to achieve the purpose, the invention provides the following scheme: the invention provides an air purification and wet flue gas dehumidification device, which comprises a spray mixing unit and a high-speed stripping unit which are communicated, wherein the spray mixing unit is communicated with an inlet pipeline, a spray head is arranged in the spray mixing unit, the spray mixing unit can spray and cool introduced wet flue gas, and the high-speed stripping unit is connected with an exhaust channel; the high-speed stripping unit comprises a stripping outer bin and a stripping inner bin, the stripping outer bin is sleeved outside the stripping inner bin, a gap is formed between the stripping outer bin and the stripping inner bin, a filter medium is arranged on the side wall of the stripping inner bin, the stripping inner bin can rotate, and the spraying and mixing unit and the exhaust channel are communicated with an inner cavity of the stripping inner bin;
the device comprises a stripping outer bin, a stripping inner bin, a condensation dehumidification unit, an inertia separation unit and an exhaust channel, wherein a gap between the stripping outer bin and the stripping inner bin is communicated with the condensation dehumidification unit, the condensation dehumidification unit can condense moisture in flue gas, the condensation dehumidification unit is connected with the inertia separation unit, the inertia separation unit can separate liquid drops in the wet flue gas, and an outlet of the inertia separation unit is communicated with the exhaust channel.
Preferably, the air purification and wet flue gas dehumidification device further comprises a secondary stripping unit, an outlet of the exhaust channel is communicated with the secondary stripping unit, and the secondary stripping unit and the high-speed stripping unit are identical in structure.
Preferably, the air purification and wet flue gas dehumidification device further comprises a secondary inertia separation unit, an outlet of the exhaust channel is communicated with the secondary inertia separation unit, and the secondary inertia separation unit and the inertia separation unit are identical in structure.
Preferably, an inlet induced draft fan is arranged at the inlet pipeline, and an air vacuum pump is arranged at the exhaust channel.
Preferably, the air purification and wet flue gas dehumidification device further comprises a confluence tank, and the high-speed stripping unit, the condensation dehumidification unit and the inertia separation unit are respectively communicated with the confluence tank.
Preferably, the filter medium is a porous material.
Preferably, the high-speed stripping unit is communicated with the top of the condensation and dehumidification unit, the bottom of the condensation and dehumidification unit is communicated with the inertia separation unit, a plurality of condensation pipes are arranged in the condensation and dehumidification unit, and gaps are formed among the condensation pipes.
Preferably, the spray head is an atomizing spray head which is communicated with an external water source.
Compared with the prior art, the invention has the following technical effects: the air purification and wet flue gas dehumidification device comprises a spraying mixing unit and a high-speed stripping unit which are communicated, wherein the spraying mixing unit is communicated with an inlet pipeline, a spray head is arranged in the spraying mixing unit, the spraying mixing unit can spray and cool introduced wet flue gas, and the high-speed stripping unit is connected with an exhaust channel; the high-speed stripping unit comprises a stripping outer bin and a stripping inner bin, the stripping outer bin is sleeved outside the stripping inner bin, a gap is formed between the stripping outer bin and the stripping inner bin, a filter medium is arranged on the side wall of the stripping inner bin, the stripping inner bin can rotate, and the spraying and mixing unit and the exhaust channel are communicated with an inner cavity of the stripping inner bin; the gap between the stripping outer bin and the stripping inner bin is communicated with a condensation dehumidification unit, the condensation dehumidification unit can condense moisture in the flue gas, the condensation dehumidification unit is connected with an inertia separation unit, the inertia separation unit can separate liquid drops in the wet flue gas, and an outlet of the inertia separation unit is communicated with an exhaust channel. The wet flue gas firstly enters the spraying mixing unit, is cooled after being sprayed by the spray head and is fully mixed with the spraying water mist, the mixed wet flue gas enters the high-speed stripping unit, the centrifugal force of pure air is small, the pure air is blocked by the stripping inner bin rotating at a high speed and is directly discharged by the exhaust channel, partial air and mist drops pass through the stripping inner bin and are thrown to the inner wall of the stripping outer bin to form water flow, partial fine mist drops and air form air flow with higher moisture content and enter the condensation dehumidifying unit, water in the air is analyzed to form water film and water flow, the wet flue gas still containing partial fine liquid drops is finally guided into the inertia separating unit to be separated, the treated pure air is discharged through the exhaust channel, and the whole process of wet flue gas dehumidification and air purification is completed. The wind resistance of the whole purification and dehumidification process is low, the requirements of high-speed flow and high throughput wet flue gas treatment are met, and the wet flue gas is dehumidified while air is purified.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic diagram of the overall structure of the air purification and wet flue gas dehumidification device of the present invention;
FIG. 2 is a schematic diagram of the overall structure of another embodiment of the air purification and wet flue gas dehumidification device of the present invention;
FIG. 3 is a schematic view of the overall structure of another embodiment of the air purification and wet flue gas dehumidification device of the present invention;
fig. 4 is a schematic view of the overall structure of the air purification and wet flue gas dehumidification device of the present invention for improving the dust removal efficiency.
Wherein, 1 is the mixing unit that sprays, 2 is the high-speed unit of peeling off, 3 is the condensation dehumidification unit, 4 are the inertia separation unit, 5 are the import draught fan, 6 are exhaust passage, 7 are peeling off interior storehouse, 8 are peeling off outer storehouse, 9 are air vacuum pump, 10 are the pond of converging, 11 are the secondary unit of peeling off, 12 are the secondary inertia separation unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide an air purification and wet flue gas dehumidification device, which solves the problems in the prior art, enables a purification device to dehumidify high-temperature wet flue gas and can purify large-flow multi-component polluted air.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1-4, fig. 1 is a schematic diagram of an overall structure of an air purification and wet flue gas dehumidification device of the present invention, fig. 2 is a schematic diagram of an overall structure of another embodiment of the air purification and wet flue gas dehumidification device of the present invention, fig. 3 is a schematic diagram of an overall structure of another embodiment of the air purification and wet flue gas dehumidification device of the present invention, and fig. 4 is a schematic diagram of an overall structure of the air purification and wet flue gas dehumidification device of the present invention when the dust removal efficiency is improved.
The invention provides an air purification and wet flue gas dehumidification device, which comprises a spray mixing unit 1 and a high-speed stripping unit 2 which are communicated, wherein the spray mixing unit 1 is communicated with an inlet pipeline, a spray head is arranged in the spray mixing unit 1, the spray mixing unit 1 can spray and cool introduced wet flue gas, and the high-speed stripping unit 2 is connected with an exhaust passage 6; the high-speed stripping unit 2 comprises a stripping inner bin 8, a stripping outer bin 8 and a stripping inner bin 7, the stripping inner bin 8 is sleeved outside the stripping inner bin 7, a gap is formed between the stripping inner bin 8 and the stripping outer bin 7, a filter medium is arranged on the side wall of the stripping inner bin 7, the stripping inner bin 7 can rotate, and the spraying and mixing unit 1 and the exhaust channel 6 are communicated with the inner cavity of the stripping inner bin 7; the gap between the stripping inner and outer bins 8 and the stripping inner bin 7 is communicated with the condensation dehumidification unit 3, the condensation dehumidification unit 3 can condense moisture in the flue gas, the condensation dehumidification unit 3 is connected with the inertia separation unit 4, the inertia separation unit 4 can separate liquid drops in the wet flue gas, and the outlet of the inertia separation unit 4 is communicated with the exhaust channel 6.
Wet flue gas firstly leads into a spraying and mixing unit 1, is cooled after being sprayed by a spray head and is fully mixed with spraying water mist, the mixed wet flue gas enters a high-speed stripping unit 2, the centrifugal force of pure air is small, the pure air is blocked by a stripping inner bin 7 rotating at a high speed and is directly discharged by an exhaust passage 6, partial air and mist drops pass through a filter medium of the stripping inner bin 7 and are thrown to the inner wall of a stripping inner bin 8 to form water flow, partial fine mist drops and the air form air flow with higher moisture content, the air flow enters a condensation and dehumidification unit 3, water in the air is analyzed to form water film and water flow, the wet flue gas still containing partial fine liquid drops is finally led into an inertia separation unit 4 to be separated, the treated pure air is discharged through the exhaust passage 6, and the whole process of wet flue gas dehumidification and air purification is completed. The wind resistance of the whole purification and dehumidification process is low, the requirements of high-speed flow and high throughput wet flue gas treatment are met, and the wet flue gas is dehumidified while air is purified. It should be noted here that the inertial separation unit 4 is an inertial separation machine in the prior art, and the separation of fine liquid droplets is completed by the operation of separating particles from the gas flow when the gas flow changes direction sharply or collides with a baffle or the like, so the detailed structure of the inertial separation unit 4 is not described here.
In other embodiments of the present invention, in order to further improve the air purification and wet flue gas whitening efficiency, the air purification and wet flue gas dehumidification device further includes a secondary stripping unit 11, an outlet of the exhaust channel 6 is communicated with the secondary stripping unit 11, the secondary drying treatment can be performed on the air guided out from the exhaust channel 6, the untreated clean liquid droplets and particle pollutants are further separated, and the clean air is discharged, and the secondary stripping unit 11 and the high-speed stripping unit 2 have the same structure.
In another embodiment of the present invention, also in order to further improve the air purification and wet flue gas whitening efficiency, the air purification and wet flue gas dehumidification device further includes a secondary inertia separation unit 12, an outlet of the exhaust channel 6 is communicated with the secondary inertia separation unit 12, secondary inertia separation is performed on the air led out from the exhaust channel 6, a cyclone separation machine can be used to further separate liquid droplets and particulate pollutants which are not processed to be clean, and the secondary inertia separation unit 12 and the inertia separation unit 4 have the same structure, so as to improve the purification degree.
It should be noted that, part of the fine mist and the air led out through the high-speed stripping unit 2 form an air stream with a higher moisture content, and may also be led into the inertial separation unit 4 first, because the moisture content is higher, the size of the liquid droplets is increased compared with the original solid particles, and the liquid droplets are easy to adhere to the solid particles to form a film, so that the efficiency of the inertial separation unit 4 is greatly improved, which is beneficial to inhibiting the secondary precipitation of the solid particles and enhancing the air purification efficiency, specifically refer to fig. 4.
Specifically, an inlet draught fan 5 is arranged at the inlet pipeline, an air vacuum pump 9 is arranged at the exhaust channel 6, and the air is guided by the draught fan and the negative pressure generated by the air vacuum pump 9, so that the wet flue gas flows smoothly.
More specifically, the air purification and wet flue gas dehumidification device further comprises a confluence tank 10, the high-speed stripping unit 2, the condensation dehumidification unit 3 and the inertia separation unit 4 are respectively communicated with the confluence tank 10, mixed water flowing out of the high-speed stripping unit 2, the condensation dehumidification unit 3 and the inertia separation unit 4 is collected in the confluence tank 10, a part of mixed liquid collected in the confluence tank 10 can be reused as spray water after being subjected to cooling treatment, and the rest of mixed liquid is discharged outwards.
In the present embodiment, the filter medium is a porous material with a large specific surface area, and the porous material is a prior art and will not be described in detail herein.
Further, high-speed stripping unit 2 is linked together with the top of condensation dehumidification unit 3, and the bottom of condensation dehumidification unit 3 is linked together with inertial separation unit 4, sets up many condenser pipes in the condensation dehumidification unit 3, has the clearance between the condenser pipe.
The spray head is an atomizing spray head which is communicated with an external water source. The contact degree of atomizing shower nozzle reinforcing spraying water smoke and gas and particulate matter improves cooling efficiency.
The high-temperature wet flue gas is subjected to a spraying and mixing unit 1, a high-speed stripping unit 2, a condensation and dehumidification unit 3 and an inertia separation unit 4. The introduced wet flue gas firstly enters the spraying and mixing unit 1 under the action of the induced draft fan, is cooled and is fully mixed with the spraying water mist; the mixed wet flue gas is introduced into the high-speed stripping unit 2, the centrifugal force of the pure air is small, the pure air is blocked by the filter medium rotating at high speed and is directly discharged to the upper exhaust channel 6, fog drops and part of the air pass through the filter medium of the stripping inner bin 7 and are thrown to the inner side wall of the stripping inner bin 8 to form downstream water flow, part of fine fog drops and the air form air flow with higher moisture content, the air flow is introduced into the condensation dehumidification unit 3 under the negative pressure action of the air vacuum pump 9, and moisture in the air is separated out under the cooling action of the cooling pipe to form water films and downstream water flow; the wet flue gas still containing part of fine liquid drops is finally guided into an inertia separation unit 4 for separation, the treated pure air is converged with the pure air of the high-speed stripping unit 2 through an exhaust channel 6, so that the whole wet flue gas stripping and whitening process is completed, and the spray water and the mixed water obtained by wet flue gas whitening and converged from the outflow ports at the lower parts of the units are concentrated in a confluence tank 10.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims (7)

1. The utility model provides an air purification and wet flue gas dehydrating unit which characterized in that: the device comprises a spraying mixing unit and a high-speed stripping unit which are communicated, wherein the spraying mixing unit is communicated with an inlet pipeline, a spray head is arranged in the spraying mixing unit, the spraying mixing unit can spray and cool introduced wet flue gas, and the high-speed stripping unit is connected with an exhaust passage; the high-speed stripping unit comprises a stripping outer bin and a stripping inner bin, the stripping outer bin is sleeved outside the stripping inner bin, a gap is formed between the stripping outer bin and the stripping inner bin, a filter medium is arranged on the side wall of the stripping inner bin, the stripping inner bin can rotate, and the spraying and mixing unit and the exhaust channel are communicated with an inner cavity of the stripping inner bin;
the gap between the stripping outer bin and the stripping inner bin is communicated with a condensation dehumidification unit, the condensation dehumidification unit can condense moisture in the flue gas, the condensation dehumidification unit is connected with an inertia separation unit, the inertia separation unit can separate liquid drops in the wet flue gas, and an outlet of the inertia separation unit is communicated with the exhaust channel;
the high-speed peeling machine further comprises a secondary peeling unit, an outlet of the exhaust channel is communicated with the secondary peeling unit, and the secondary peeling unit and the high-speed peeling unit are identical in structure.
2. The air purification and wet flue gas dehumidification device of claim 1, wherein: the secondary inertia separation unit is communicated with an outlet of the exhaust channel, and the secondary inertia separation unit and the inertia separation unit are identical in structure.
3. The air purification and wet flue gas dehumidification device of claim 1, wherein: an inlet induced draft fan is arranged at the inlet pipeline, and an air vacuum pump is arranged at the exhaust passage.
4. The air purification and wet flue gas dehumidification device of claim 1, wherein: the high-speed stripping unit, the condensation and dehumidification unit and the inertia separation unit are respectively communicated with the confluence tank.
5. The air purification and wet flue gas dehumidification device of claim 1, wherein: the filter medium is made of porous materials.
6. The air purification and wet flue gas dehumidification device of claim 1, wherein: the high-speed stripping unit is communicated with the top of the condensation dehumidifying unit, the bottom of the condensation dehumidifying unit is communicated with the inertia separating unit, a plurality of condensing pipes are arranged in the condensation dehumidifying unit, and gaps are reserved among the condensing pipes.
7. The air purification and wet flue gas dehumidification device of claim 1, wherein: the spray head is an atomizing spray head which is communicated with an external water source.
CN201811093414.8A 2018-09-19 2018-09-19 Air purification and wet flue gas dehumidification device Active CN109045918B (en)

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CN111569578A (en) * 2020-05-27 2020-08-25 刘毅 Fog stripping fan and dynamic demisting system

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US4110088A (en) * 1976-06-18 1978-08-29 Cold David M Apparatus and method for removal of pollutants from flue gas
CN2552584Y (en) * 2001-12-18 2003-05-28 周明连 Tubular purifier
JP2004337694A (en) * 2003-05-14 2004-12-02 Takayoshi Imai Dehumidification apparatus
NO330124B1 (en) * 2009-06-11 2011-02-21 Ntnu Tech Transfer As A separator for a gas / liquid stream
CN102580408B (en) * 2012-03-20 2014-03-26 杨东进 Active centrifugal gas-liquid separation device
CN204447666U (en) * 2015-02-05 2015-07-08 陈相荣 A kind of smoke condensation device with dust-removal and desulfurizing denitration function
CN105107352A (en) * 2015-07-21 2015-12-02 无锡翱翔环保机械有限公司 Wet two-stage cyclone desulfurization tower

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