CN110841427A - Flue gas desulfurization and denitrification device for factory - Google Patents
Flue gas desulfurization and denitrification device for factory Download PDFInfo
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- CN110841427A CN110841427A CN201911331661.1A CN201911331661A CN110841427A CN 110841427 A CN110841427 A CN 110841427A CN 201911331661 A CN201911331661 A CN 201911331661A CN 110841427 A CN110841427 A CN 110841427A
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- flue gas
- liquid
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 239000003546 flue gas Substances 0.000 title claims abstract description 56
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 41
- 230000023556 desulfurization Effects 0.000 title claims abstract description 41
- 238000010521 absorption reaction Methods 0.000 claims abstract description 197
- 239000007788 liquid Substances 0.000 claims abstract description 170
- 239000007789 gas Substances 0.000 claims abstract description 36
- 238000001914 filtration Methods 0.000 claims abstract description 16
- 230000001502 supplementing effect Effects 0.000 claims description 27
- 238000007789 sealing Methods 0.000 claims description 26
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 21
- 239000012530 fluid Substances 0.000 claims description 18
- 238000001802 infusion Methods 0.000 claims description 16
- 230000007246 mechanism Effects 0.000 claims description 14
- 238000007599 discharging Methods 0.000 claims description 12
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 11
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 11
- 239000000835 fiber Substances 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 238000003860 storage Methods 0.000 claims description 9
- 239000004677 Nylon Substances 0.000 claims description 8
- 229920001778 nylon Polymers 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000009826 distribution Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 24
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 239000013589 supplement Substances 0.000 abstract description 2
- 239000006096 absorbing agent Substances 0.000 abstract 1
- 238000001179 sorption measurement Methods 0.000 description 7
- 239000002250 absorbent Substances 0.000 description 5
- 230000002745 absorbent Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000010079 rubber tapping Methods 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- UKLNMMHNWFDKNT-UHFFFAOYSA-M sodium chlorite Chemical compound [Na+].[O-]Cl=O UKLNMMHNWFDKNT-UHFFFAOYSA-M 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Images
Classifications
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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
- B01D53/14—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 by absorption
- B01D53/1456—Removing acid components
- B01D53/1481—Removing sulfur dioxide or sulfur trioxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
- B01D46/12—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
- B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
-
- 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
- B01D53/14—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 by absorption
-
- 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
- B01D53/14—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 by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a factory flue gas desulfurization and denitrification device which comprises an air inlet fan, a first shell, a second shell and a filtering device, wherein the air inlet fan, the first shell, the second shell and the filtering device are sequentially connected through a pipeline; a rotating shaft is rotatably arranged in the first shell along the horizontal direction, at least one absorption disc is fixedly connected to the rotating shaft, absorption liquid is contained in the first shell, and a part of the absorption disc is immersed in the absorption liquid; a drive impeller coaxial with the absorber disc is rotatably disposed within the second housing. According to the invention, the absorption disc rotates, the porous structure of the absorption disc is continuously immersed into the absorption liquid to supplement new absorption liquid for the absorption disc, and when the flue gas penetrates through the absorption disc, the flue gas is fully reacted with the absorption liquid in the absorption disc, so that the contact effect of the flue gas and the absorption liquid can be improved, and the desulfurization and denitrification effects are improved; the invention utilizes the power of the gas exhausted from the first shell to drive the driving impeller to rotate, thereby driving the absorption disc to rotate, and the self exhaust is used as a power source, thereby reducing a driving motor and reducing the energy consumption.
Description
Technical Field
The invention relates to the field of waste gas treatment, in particular to a factory flue gas desulfurization and denitrification device.
Background
At present, the rapid development of industrialization inevitably produces a large amount of industrial waste gas, which not only affects the normal production of the factory, but also causes serious pollution to the environment, so how to effectively reduce the pollution caused by the industrial waste gas becomes a problem which needs to be solved urgently at present. Such as steel industry, thermal power plant, etc., can produce a large amount of SO2、SO3、NOXPollutants are a great air pollution source and can be discharged only through desulfurization and denitrification treatment. In the existing desulfurization and denitrification treatment process, the wet process which adopts absorption liquid to react with flue gas to perform desulfurization and denitrification is generally applied, wherein the adopted absorption liquid needs to have a removal effect on sulfur and nitrate, so that desulfurization and denitrification can be performed simultaneously.
When the absorption liquid is reacted with the flue gas to perform desulfurization and denitrification, one of the important factors of the desulfurization and denitrification effect is whether the flue gas is in sufficient contact with the absorption liquid. The conventional method is to adopt a treatment tower to realize the contact reaction of the flue gas and the absorption liquid by a countercurrent contact mode of the flue gas upstream and the absorption liquid downstream. The contact effect of the flue gas and the absorption liquid mainly depends on whether the flue gas flows upwards, whether the absorption liquid flows downwards uniformly, whether the amount of the absorption liquid flowing downwards is enough, and the like. Therefore, a large amount of absorption liquid is required to be sprayed downwards continuously, so that the problems that the waste of the absorption liquid is large or the contact between the flue gas and the absorption liquid is still insufficient in a conventional mode, the desulfurization and denitrification effects are affected and the like easily exist. Therefore, a more reliable desulfurization and denitrification scheme is needed.
Disclosure of Invention
The invention aims to solve the technical problem of providing a factory flue gas desulfurization and denitrification device aiming at the defects in the prior art.
In order to solve the technical problems, the invention adopts the technical scheme that: a factory flue gas desulfurization and denitrification device comprises an air inlet fan, a first shell, a second shell and a filtering device which are sequentially connected through a pipeline;
a rotating shaft is rotatably arranged in the first shell along the horizontal direction, at least one absorption disc is fixedly connected to the rotating shaft, absorption liquid is contained in the first shell, and a part of the absorption disc is immersed in the absorption liquid;
the second shell is internally and rotatably provided with a driving impeller coaxial with the absorption disc, the first air outlet of the first shell is communicated with the second air inlet of the second shell through a first air transmission pipeline, so that the driving impeller is driven to rotate by the air discharged from the first shell, and the absorption disc coaxial with the driving impeller is driven to rotate.
Preferably, the first shell is cylindrical, and the central axis of the first shell coincides with the axis of the rotating shaft; the peripheral side wall of the first shell protrudes outwards to form annular containing cavities the number of which is the same as that of the absorbing discs, and the absorbing discs are rotatably arranged in the annular containing cavities.
Preferably, the absorption disc comprises an absorption disc body, disc-shaped support nets arranged on two side surfaces of the absorption disc body, and a shaft hole opened in the middle of the absorption disc body for the rotating shaft to pass through;
the diameters of the two disc-shaped supporting nets are larger than that of the absorption disc body, an annular groove is formed between the periphery of the two disc-shaped supporting nets and the peripheral side wall of the absorption disc body, a plurality of ejector rods fixedly connected with the peripheral side wall of the absorption disc body are arranged in the annular groove in an annular array mode, and the outer ends of the ejector rods extend out of the annular groove; the absorption disc body is internally provided with a porous structure.
Preferably, the outer end of the ejector pin has an arc-shaped guide surface.
Preferably, the upper part of the first shell is provided with an automatic liquid supplementing box fixedly connected with the outer wall of the annular accommodating cavity, absorption liquid is contained in the automatic liquid supplementing box, and an automatic liquid discharging mechanism is arranged in the automatic liquid supplementing box.
Preferably, a bottom plate of the automatic liquid replenishing box is provided with a liquid replenishing hole communicated with the annular accommodating cavity, and the automatic liquid discharging mechanism comprises a sleeve rod fixedly connected with a top plate of the automatic liquid replenishing box, an inner rod telescopically inserted in the sleeve rod from bottom to top, a sealing ball fixedly connected at the bottom end of the inner rod, and a pressure spring sleeved on the periphery of the inner rod and clamped between the sleeve rod and the sealing ball;
the diameter of the sealing ball is larger than the diameters of the inner rod and the liquid supplementing hole; when no external force is applied, the lower end of the sealing ball is pressed against the fluid infusion hole, so that the fluid infusion hole is sealed.
Preferably, a liquid storage tank for storing absorption liquid is further arranged on the first shell, and the liquid storage tank is communicated with the automatic liquid supplementing box through a liquid supplementing pipeline.
Preferably, the second shell is provided with a second air inlet and a second air outlet, and the second air outlet is communicated with a third air inlet at the lower end of the filtering device through a second air transmission pipeline;
the filtering device comprises a shell, a conical gas distribution cylinder arranged in the shell and communicated with the third gas inlet, a fan-shaped filtering layer arranged in the shell and above the conical gas distribution cylinder, and a third gas outlet arranged at the upper end of the shell.
Preferably, fan-shaped filter layer includes activated carbon layer, nylon layer and the PTFE fibrous layer that sets gradually by supreme down, just activated carbon layer and PTFE fibrous layer's upper and lower surface all be provided with the arc support filter plate of the inner wall rigid coupling of shell.
Preferably, a first air inlet is arranged on the side portion of the first shell, an air inlet pipe is arranged on the first air inlet, and an air inlet fan is arranged on the air inlet pipe.
The invention has the beneficial effects that:
according to the factory flue gas desulfurization and denitration device, the absorption disc rotates, the porous structure of the absorption disc is continuously immersed into the absorption liquid, new absorption liquid is supplemented for the absorption disc, and when the flue gas penetrates through the absorption disc, the flue gas is fully reacted with the absorption liquid in the absorption disc, so that the contact effect of the flue gas and the absorption liquid can be improved, and the desulfurization and denitration effect is improved;
the driving impeller is driven to rotate by the power of the gas exhausted from the first shell, so that the absorption disc is driven to rotate, and the exhaust of the absorption disc is used as a power source, so that a driving motor is reduced, and the energy consumption is reduced;
according to the invention, by arranging the automatic liquid discharging mechanism, the absorption liquid contained in the automatic liquid supplementing box can automatically flow out at intervals by utilizing the rotation of the absorption disc, and enters the first shell, the absorption liquid flowing out of the automatic liquid supplementing box drops into the annular groove, enters the absorption disc and then flows downwards along the inside of the absorption disc, so that the absorption disc can be filled with the absorption liquid all the time, the absorption disc can be continuously supplemented with the absorption liquid from the upper part, the flue gas is fully contacted with the absorption liquid, and the desulfurization and denitrification effects are further improved;
according to the invention, the active carbon layer, the nylon layer and the PTFE fiber layer are stacked, and the fan-shaped structure is adopted, so that the flue gas can be further effectively filtered, and the finally discharged gas can meet the discharge requirement.
Drawings
FIG. 1 is a schematic structural diagram of a plant flue gas desulfurization and denitrification apparatus according to the present invention;
FIG. 2 is a front view of the first housing of the present invention;
FIG. 3 is a side view of the first housing of the present invention;
FIG. 4 is a schematic cross-sectional view in the radial direction of an absorbent disk of the present invention;
FIG. 5 is a schematic cross-sectional view of an absorbent disk of the present invention in an axial direction;
FIG. 6 is a schematic structural view of the liquid replenishing hole opened by the cooperation of the push rod and the automatic liquid discharging mechanism;
FIG. 7 is a partially enlarged schematic view of the ejector pin and the automatic tapping mechanism of the present invention;
FIG. 8 is a schematic structural view of the ejector rod and the automatic tapping mechanism in cooperation when the fluid infusion hole is sealed;
FIG. 9 is a schematic structural diagram of a second housing according to the present invention;
fig. 10 is a schematic structural view of the filter device of the present invention.
Description of reference numerals:
1-an air inlet fan;
2-a first housing; 20 — a first air inlet; 21 — a first air outlet; 22-a rotating shaft; 23-an absorbent disc; 24-an annular containment chamber; 25-liquid inlet; 26-liquid discharge port; 27-an air inlet pipe; 28-a first gas transmission pipeline; 230 — an absorbent disc body 230; 231-disc-shaped support net; 232-axle hole; 233-ring groove; 234-mandril; 235-an arc-shaped guide surface;
3-a second housing; 30-driving the impeller; 31 — a second inlet; 32-a second air outlet; 33-a second gas transmission pipeline;
4-a filtering device; 40-a housing; 41-third air inlet; 42-third outlet; 43-conical gas cylinder; 44-a fan filter layer; 440 — an activated carbon layer; 441-a nylon layer; 442-a PTFE fibre layer; 443-arc support filter plate;
5, an automatic liquid replenishing box; 50-automatic tapping mechanism; 51-a base plate; 52-a top plate; 53-fluid infusion hole; 500-loop bar; 501, an inner rod; 502-sealing ball; 503-pressure spring;
6, a liquid storage tank; 60-fluid infusion pipeline;
7 — a first support;
8-second support.
Detailed Description
The present invention is further described in detail below with reference to examples so that those skilled in the art can practice the invention with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
As shown in fig. 1 to 10, the plant flue gas desulfurization and denitrification apparatus of the present embodiment includes an air inlet fan 1, a first casing 2, a second casing 3, and a filtering device 4, which are connected in sequence through a pipeline;
a rotating shaft 22 is rotatably arranged in the first shell 2 along the horizontal direction, at least one absorption disc 23 is fixedly connected to the rotating shaft 22, absorption liquid is contained in the first shell 2, and a part of the absorption disc 23 is immersed in the absorption liquid;
the second housing 3 is rotatably provided therein with a driving impeller 30 coaxial with the absorbing discs 23, and the first air outlet 21 of the first housing 2 is communicated with the second air inlet 31 of the second housing 3 through a first air duct 28, so that the driving impeller 30 is driven to rotate by the air discharged from the first housing 2, thereby driving the absorbing discs 23 coaxial with the driving impeller 30 to rotate.
The first air inlet 20 is arranged on the side portion of the first shell 2, the air inlet pipe 27 is arranged on the first air inlet 20, and the air inlet fan 1 is arranged on the air inlet pipe 27.
The plant flue gas desulfurization and denitration device is arranged at the exhaust end of a plant flue gas discharge system and is used for performing desulfurization and denitration treatment on plant flue gas. The invention mainly carries out desulfurization and denitrification through the reaction of the absorption liquid and the flue gas, and finally, the absorption liquid is further filtered by the filtering device 4 so as to ensure that the discharged gas meets the emission standard. Wherein, the absorption liquid is selected from conventional products, and the absorption liquid capable of simultaneously desulfurizing and denitrating is selected, such as calcium hydroxide slurry, NaClO2/NaClO composite absorption liquid or other conventional absorption liquids capable of simultaneously desulfurizing and denitrating.
In the present invention, the absorption plate 23 itself is a porous structure that is permeable to the smoke gas that can pass through the absorption plate 23. Utilize the power of the gaseous drive impeller 30 of first casing 2 exhaust to rotate to drive and absorb dish 23 and rotate, when absorbing dish 23 and rotating, absorb the incessant absorption liquid that immerses in of dish 23 bottom, for absorbing dish 23 replenishment new absorption liquid, when the flue gas sees through absorbing dish 23, fully react with the absorption liquid of absorbing the inside of dish 23, realize SOx/NOx control. Exhaust through self is as the power supply, has reduced a driving motor, has reduced the energy consumption, and incessantly rotation through absorbing disc 23 has improved SOx/NOx control's effect again simultaneously.
The flue gas of the factory enters the first shell 2 under the action of the air inlet fan 1, sequentially passes through the absorption discs 23 from left to right, is subjected to desulfurization and denitrification through reaction with absorption liquid, and then enters the second shell 3 to drive the driving impeller 30 to rotate; the gas discharged from the second housing 3 enters the filtering device 4 again, and is discharged after being further filtered.
Specifically, in the present embodiment, referring to fig. 1 to 9, the first housing 2 has a cylindrical shape, and the central axis thereof coincides with the axis of the rotating shaft 22; the outer peripheral side wall of the first housing 2 is projected outward to form annular accommodating chambers 24 in the same number as the number of the absorption disks 23, and the absorption disks 23 are rotatably disposed in the annular accommodating chambers 24. The number of the absorption disk 23 and the annular accommodation chamber 24 is 3 in this embodiment.
The adsorption tray 23 includes an adsorption tray 23 body 230, tray-shaped support nets 231 provided on both side surfaces of the adsorption tray 23 body 230, and a shaft hole 232 opened in the middle of the adsorption tray 23 body 230 through which the rotation shaft 22 passes; the rotation shaft 22 is rotatably connected to both the first casing 2 and the second casing 3, and the absorption disk 23 and the driving impeller 30 are fixed to the rotation shaft 22. The disc-shaped support screen 231 can enhance the mechanical strength of the body 230 of the absorption tray 23, allowing the passage of fumes. Can be made of corrosion-resistant metal or hard plastic.
The diameters of the two disk-shaped supporting nets 231 are larger than the diameter of the absorption disk 23 body 230, a ring-shaped groove 233 is formed between the outer periphery of the two disk-shaped supporting nets 231 and the outer peripheral side wall of the absorption disk 23 body 230, a plurality of push rods 234 fixedly connected with the outer peripheral side wall of the absorption disk 23 body 230 are arranged in the ring-shaped array in the ring-shaped groove 233, and the outer ends of the push rods 234 extend out of the ring-shaped groove 233. The diameter of the two disk-shaped supporting nets 231 is smaller than the outer diameter of the annular accommodating chamber 24 and larger than the inner diameter of the first housing 2, so that the amount of flue gas which directly flows through the gap between the absorption disk 23 and the first housing 2 without passing through the absorption disk 23 can be greatly reduced; while also ensuring that the absorption disk 23 can rotate freely in the annular accommodation chamber 24. The absorption disc 23 body 230 is provided with a porous structure inside, so that the smoke can pass through the absorption disc 23 body 230, and the absorption disc 23 body 230 has a good absorption effect on the absorption liquid, so that the absorption disc 23 body 230 can be filled with the absorption liquid. In this embodiment, the absorption disk 23 body 230 is made of carbon fiber, and has densely distributed micropores inside, so that the flue gas can pass through the disk-shaped support net 231 and the absorption disk 23 body 230.
Further, the outer end of the ejector pin 234 has an arc-shaped guide surface 235.
The upper part of the first shell 2 is provided with an automatic liquid supplementing box 5 fixedly connected with the outer wall of the annular accommodating cavity 24, the automatic liquid supplementing box 5 is filled with absorption liquid, and the automatic liquid discharging mechanism 50 is arranged in the automatic liquid supplementing box 5. A bottom plate 51 of the automatic liquid supplementing box 5 is provided with a liquid supplementing hole 53 communicated with the annular accommodating cavity 24, and the automatic liquid discharging mechanism 50 comprises a sleeve rod 500 fixedly connected with a top plate 52 of the automatic liquid supplementing box 5, an inner rod 501 telescopically inserted in the sleeve rod 500 from bottom to top, a sealing ball 502 fixedly connected at the bottom end of the inner rod 501 and a pressure spring 503 sleeved on the periphery of the inner rod 501 and clamped between the sleeve rod 500 and the sealing ball 502; the diameter of the sealing ball 502 is larger than the diameters of the inner rod 501 and the fluid infusion hole 53, and the diameter of the fluid infusion hole 53 is preferably 1/2-3/4 of the diameter of the sealing ball 502; when no external force is applied, the lower end of the sealing ball 502 is pressed against the fluid infusion hole 53, so that the fluid infusion hole 53 is sealed. When external force acts, the sealing ball 502 moves upwards by the external force to compress the pressure spring 503, the inner rod 501 moves upwards relative to the sleeve rod 500, the sealing ball 502 is separated from the liquid supplementing hole 53, the liquid supplementing hole 53 is opened, and absorption liquid can flow downwards through the liquid supplementing hole 53 and enter the first shell 2. The loop bar 500 is used for guiding the inner rod 501 and limiting the inner rod 501 to slide only up and down.
When the absorption liquid is reacted with the flue gas to perform desulfurization and denitrification, one of the important factors of the desulfurization and denitrification effect is whether the flue gas is fully contacted with the absorption liquid. The conventional method is to adopt a treatment tower to realize the contact reaction of the flue gas and the absorption liquid by a countercurrent contact mode of the flue gas upstream and the absorption liquid downstream. The contact effect of the flue gas and the absorption liquid mainly depends on whether the flue gas is uniform in upward flow, whether the absorption liquid is uniform in downward flow and whether the amount of the absorption liquid in downward flow is enough. Therefore, it is usually necessary to ensure that a large amount of absorption liquid is continuously sprayed downwards, and the air intake of the flue gas is also greatly limited. Therefore, the problems that absorption liquid is wasted greatly, energy consumption for transporting the absorption liquid is high (the absorption liquid is generally conveyed and sprayed continuously through a pump), contact between flue gas and the absorption liquid is still insufficient, and the desulfurization and denitrification effects are affected exist in a conventional mode. The invention can well solve the problem that the contact between the smoke and the absorption liquid is still insufficient.
In the invention, the absorption disc 23 continuously rotates, so that the absorption disc 23 can continuously absorb the absorption liquid at the lower part of the first shell 2, and the absorption disc 23 is continuously supplemented with the absorption liquid from the lower part, thereby ensuring the amount of the absorption liquid in the absorption disc 23 and ensuring the desulfurization and denitrification effects. According to the invention, the automatic liquid discharging mechanism 50 is further arranged, and the rotation of the absorption disc 23 is utilized to enable the absorption liquid contained in the automatic liquid supplementing box 5 to automatically flow out at intervals, the absorption liquid enters the first shell 2, the absorption liquid flowing out of the automatic liquid supplementing box 5 drops into the annular groove 233, enters the absorption disc 23 and then flows downwards along the inside of the absorption disc 23, so that the absorption disc 23 can be further filled with the absorption liquid all the time, the absorption liquid can be continuously supplemented to the absorption disc 23 from the upper part, the flue gas is fully contacted with the absorption liquid, and the desulfurization and denitrification effects are further improved. Since the liquid level of the absorption liquid in the first casing 2 is limited and the liquid level preferably does not contaminate the rotary shaft 22, the absorption pan 23 is only partially immersed in the absorption liquid, the absorption liquid replenished from the lower side of the absorption pan 23 is limited, and the amount of the absorption liquid in the absorption pan 23 can be secured by adding one time of the absorption liquid replenishment to the upper side.
Specifically, the gas discharged from the first gas outlet 21 of the first housing 2 drives the driving impeller 30 to rotate, and drives the absorption disk 23 to rotate through the rotating shaft 22, and different areas on the periphery of the absorption disk 23 are continuously immersed in the absorption liquid to supplement the absorption liquid for the absorption disk 23. The outer end of the push rod 234 extends out of the annular groove 233, and when the absorption disk 23 rotates, the outer end of the push rod 234 can contact the sealing ball 502 and can not contact the bottom plate 51 of the automatic liquid replenishing box 5. Referring to fig. 6 and 7, when the absorption disk 23, the arc-shaped guide surface 235 at the outer end of the push rod 234 contacts the bottom of the sealing ball 502, the inner rod 501 moves linearly upward under the guiding action of the sleeve rod 500 along with the rotation of the push rod 234, the compression spring 503 is pressed, the sealing ball 502 is separated from the fluid infusion hole 53, the fluid infusion hole 53 is opened, the absorption liquid flows downward through the fluid infusion hole 53 and enters the first housing 2, the absorption liquid drops into the annular groove 233, enters the absorption disk 23 and then flows downward along the inside of the absorption disk 23, and the absorption liquid is automatically replenished to the absorption disk 23. Referring to fig. 8, when the push rod 234 continues to rotate over the sealing ball 502, under the downward elastic force of the compression spring 503, the inner rod 501 drives the sealing ball 502 to move downward, and presses against the fluid infusion hole 53, so that the fluid infusion hole 53 is sealed, and the absorption liquid is prevented from flowing out continuously. The automatic liquid discharging mechanism 50 can automatically and intermittently open the liquid replenishing holes 53 to replenish the absorption plate 23 with the absorption liquid from the upper part, so that the absorption plate 23 can be ensured to be filled with the absorption liquid, and the waste of the absorption liquid caused by continuous liquid replenishing can be prevented. By increasing the number of the jack pins 234, the amount of the absorption liquid replenished from above can be adjusted: the larger the amount, the larger the amount of the absorbent liquid to be replenished.
And when the air intake quantity is larger, the gas quantity discharged from the first casing 2 is larger, the rotating speed of the driving impeller 30 is larger, the absorption disc 23 rotates and increases, the absorption liquid quantity sucked from the lower part of the absorption disc 23 is increased, the absorption liquid in the upper flow of the automatic liquid discharging mechanism 50 is increased (after the rotating speed of the absorption disc 23 is increased, the interval of opening the liquid supplementing holes 53 each time is shortened), the effect of supplementing the absorption liquid by the absorption disc 23 is enhanced, and finally the desulfurization and denitrification effects of the absorption disc 23 on the flue gas can be synchronously enhanced. Therefore, the air inlet load can be automatically adapted to the change of the air inlet load within a certain range: the larger the air inflow is, the stronger the effect of the absorption disc 23 for supplementing the absorption liquid is, and the desulfurization and denitrification effects can be ensured; when the intake air amount is decreased, the absorption liquid supplied to the absorption pan 23 is decreased, and the consumption of the absorption liquid can be reduced.
The arc-shaped guide surface 235 at the outer end of the ejector rod 234 enables the ejector rod 234 to be in contact with the sealing ball 502 through an arc surface, so that the ejector rod 234 can be favorable for pushing the sealing ball 502 to move upwards, and the phenomenon that the movement is blocked is avoided.
The sealing ball 502 is preferably a sphere with certain elasticity, or an elastic sealing member is disposed on the sealing ball 502 or the fluid replenishing hole 53, so that the sealing ball 502 can have a good sealing effect when being pressed on the fluid replenishing hole 53, and leakage is prevented.
It should be understood that, in the present invention, the components in contact with the absorption liquid should preferably be made of corrosion-resistant material to ensure the use of the device.
The first shell 2 is also provided with a liquid storage tank 6 for storing absorption liquid, and the liquid storage tank 6 is communicated with the automatic liquid supplementing box 5 through a liquid supplementing pipeline 60. The automatic liquid replenishing box 5 is filled with absorption liquid all the time, and when the absorption liquid flows out of the automatic liquid replenishing box 5, the absorption liquid in the liquid storage tank 6 automatically flows into the automatic liquid replenishing box 5 through self-flow. The absorption liquid in the liquid storage tank 6 can be replenished by a pump. The reservoir 6 is mounted on the first housing 2 by a second bracket 8. The first and second housings 2 and 3 may be disposed on the ground by a first bracket 7.
In addition, the first housing 2 is also provided with a liquid inlet 25 and a liquid outlet 26 for replenishing and discharging the absorption liquid.
In another embodiment, referring to fig. 10, further, the second casing 3 is provided with a second air inlet 31 and a second air outlet 32, and the second air outlet 32 is communicated with a third air inlet 41 at the lower end of the filtering device 4 through a second air transmission pipeline 33; the filter device 4 includes a housing 40, a conical gas cylinder 43 disposed in the housing 40 and communicating with the third gas inlet 41, a fan-shaped filter layer 44 disposed in the housing 40 above the conical gas cylinder 43, and a third gas outlet 42 disposed at an upper end of the housing 40. The fan-shaped filter layer 44 includes an activated carbon layer 440, a nylon layer 441, and a PTFE fiber layer 442, which are sequentially disposed from bottom to top, and the upper and lower surfaces of the activated carbon layer 440 and the PTFE fiber layer 442 are both provided with arc-shaped support filter plates 443 fixed to the inner wall of the housing 40. After the flue gas is treated by the first shell 2, the flue gas is further filtered by sequentially passing through the activated carbon layer 440, the nylon layer 441 and the PTFE fiber layer 442 from bottom to top, so that the finally discharged gas can meet the emission requirement.
Wherein, the conical gas cylinder 43 can uniformly and fully guide the entering gas to the lower part of the fan-shaped filter layer 44, and the arc-shaped support filter plate 443 has the support function to form the fan-shaped filter layer 44 structure. The fan-shaped filter layer 44 can increase the contact area of the filter layer and the gas, and improve the filtering effect. The activated carbon layer 440 has a good adsorption effect, the nylon layer 441 has a good adsorption effect and can enhance mechanical properties, and the PTFE fiber layer 442 has excellent adsorption properties and good mechanical properties. Through the activated carbon layer 440, the nylon layer 441 and the PTFE fiber layer 442 that the range upon range of setting to adopt fan-shaped structure, can further effectively filter the flue gas, guarantee that the gas of final emission can satisfy the emission requirement.
While embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields of application of the invention, and further modifications may readily be effected by those skilled in the art, so that the invention is not limited to the specific details without departing from the general concept defined by the claims and the scope of equivalents.
Claims (10)
1. A factory flue gas desulfurization and denitrification device is characterized by comprising an air inlet fan, a first shell, a second shell and a filtering device which are sequentially connected through a pipeline;
a rotating shaft is rotatably arranged in the first shell along the horizontal direction, at least one absorption disc is fixedly connected to the rotating shaft, absorption liquid is contained in the first shell, and a part of the absorption disc is immersed in the absorption liquid;
the second shell is internally and rotatably provided with a driving impeller coaxial with the absorption disc, the first air outlet of the first shell is communicated with the second air inlet of the second shell through a first air transmission pipeline, so that the driving impeller is driven to rotate by the air discharged from the first shell, and the absorption disc coaxial with the driving impeller is driven to rotate.
2. The plant flue gas desulfurization and denitrification device according to claim 1, wherein the first housing has a cylindrical shape, and the central axis of the first housing coincides with the axis of the rotating shaft; the peripheral side wall of the first shell protrudes outwards to form annular containing cavities the number of which is the same as that of the absorbing discs, and the absorbing discs are rotatably arranged in the annular containing cavities.
3. The plant flue gas desulfurization and denitrification device according to claim 2, wherein the absorption disc comprises an absorption disc body, disc-shaped support nets arranged on two side surfaces of the absorption disc body, and a shaft hole opened in the middle of the absorption disc body for the rotating shaft to pass through;
the diameters of the two disc-shaped supporting nets are larger than that of the absorption disc body, an annular groove is formed between the periphery of the two disc-shaped supporting nets and the peripheral side wall of the absorption disc body, a plurality of ejector rods fixedly connected with the peripheral side wall of the absorption disc body are arranged in the annular groove in an annular array mode, and the outer ends of the ejector rods extend out of the annular groove; the absorption disc body is internally provided with a porous structure.
4. The plant flue gas desulfurization and denitrification apparatus according to claim 3, wherein the outer end of the ejector rod has an arc-shaped guide surface.
5. The plant flue gas desulfurization and denitrification device according to claim 2, wherein an automatic liquid replenishing box fixedly connected with the outer wall of the annular accommodating cavity is arranged at the upper part of the first shell, absorption liquid is contained in the automatic liquid replenishing box, and an automatic liquid discharging mechanism is arranged in the automatic liquid replenishing box.
6. The factory flue gas desulfurization and denitrification device according to claim 5, wherein a bottom plate of the automatic liquid replenishing box is provided with a liquid replenishing hole communicated with the annular accommodating cavity, the automatic liquid discharging mechanism comprises a loop bar fixedly connected with a top plate of the automatic liquid replenishing box, an inner rod telescopically inserted in the loop bar from bottom to top, a seal ball fixedly connected at the bottom end of the inner rod, and a pressure spring sleeved on the periphery of the inner rod and clamped between the loop bar and the seal ball;
the diameter of the sealing ball is larger than the diameters of the inner rod and the liquid supplementing hole; when no external force is applied, the lower end of the sealing ball is pressed against the fluid infusion hole, so that the fluid infusion hole is sealed.
7. The plant flue gas desulfurization and denitrification device according to claim 1, wherein a liquid storage tank for storing absorption liquid is further arranged on the first shell, and the liquid storage tank is communicated with the automatic liquid supplementing box through a liquid supplementing pipeline.
8. The plant flue gas desulfurization and denitrification device according to claim 1, wherein the second casing is provided with a second gas inlet and a second gas outlet, and the second gas outlet is communicated with a third gas inlet at the lower end of the filtering device through a second gas transmission pipeline;
the filtering device comprises a shell, a conical gas distribution cylinder arranged in the shell and communicated with the third gas inlet, a fan-shaped filtering layer arranged in the shell and above the conical gas distribution cylinder, and a third gas outlet arranged at the upper end of the shell.
9. The factory flue gas desulfurization and denitrification device according to claim 8, wherein the fan-shaped filter layer comprises an activated carbon layer, a nylon layer and a PTFE fiber layer which are sequentially arranged from bottom to top, and arc-shaped support filter plates fixedly connected with the inner wall of the shell are arranged on the upper surface and the lower surface of the activated carbon layer and the upper surface and the lower surface of the PTFE fiber layer respectively.
10. The plant flue gas desulfurization and denitrification device according to claim 1, wherein a first air inlet is formed in a side portion of the first housing, an air inlet pipe is arranged on the first air inlet, and an air inlet fan is arranged on the air inlet pipe.
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